Moderna and Merck Announce mRNA-4157 (V940) in Combination With KEYTRUDA(R) (pembrolizumab) Demonstrated a Statistically Significant and Clinically Meaningful Improvement in Distant Metastasis-Free Survival in Patients with High-Risk Stage III/IV Melanoma Following Complete Resection Versus KEYTRUDA

On June 5, 2023 Moderna, Inc. (NASDAQ:MRNA), a biotechnology company pioneering messenger RNA (mRNA) therapeutics and vaccines, and Merck (NYSE:MRK), known as MSD outside of the United States and Canada, reported distant metastasis-free survival (DMFS) results from the Phase 2b randomized KEYNOTE-942/mRNA-4157-P201 study, a clinical trial evaluating mRNA-4157 (V940), an investigational individualized neoantigen therapy (INT), in combination with KEYTRUDA, Merck’s anti-PD-1 therapy, in patients with resected high-risk melanoma (stage III/IV) (Press release, Moderna Therapeutics, JUN 5, 2023, View Source [SID1234632487]). In the overall intention-to-treat (ITT) population, adjuvant treatment with mRNA-4157 (V940) in combination with KEYTRUDA demonstrated a statistically significant and clinically meaningful improvement in DMFS, a key secondary endpoint of the study, compared with KEYTRUDA alone and reduced the risk of developing distant metastasis or death by 65% (HR=0.347 [95% CI, 0.145-0.828]); one-sided p value=0.0063). The secondary endpoint of DMFS, defined as the time from the first dose of KEYTRUDA until the date of first distant recurrence or death from any cause, was pre-specified for statistical testing following the positive primary endpoint of recurrence-free survival (RFS). These late-breaking data are being presented for the first time today at 5:00 p.m. ET during an oral abstract session at the 2023 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting (abstract #LBA9503).

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"We are excited to be sharing these results with the oncology community and thrilled to see such an exceptional result in distant melanoma recurrence or death. Patients who experience metastases at distant sites typically have worse survival outcomes and a poor prognosis, thus these results showing a reduction in the risk of distant recurrence underscore the potential of neoantigen therapy," said Kyle Holen, M.D. Moderna’s Senior Vice President and Head of Development, Therapeutics and Oncology. "These results add to the emerging picture of how individualized neoantigen therapy may transform melanoma treatment and the promise it may hold for other types of cancer. Together with Merck, we are rapidly advancing our efforts to move this forward for patients."

"Patients with stage III and IV melanoma can be at high risk of having their cancer recur or metastasize to other sites," said Dr. Eric H. Rubin, senior vice president, global clinical development, Merck Research Laboratories. "These new DMFS results build upon the positive recurrence-free survival data previously observed from this Phase 2b study, and we look forward to working with Moderna to initiate a Phase 3 study in melanoma later this year."

Based on data from KEYNOTE-942/mRNA-4157-P201, the U.S. Food and Drug Administration and European Medicines Agency granted Breakthrough Therapy Designation and the Priority Medicines (PRIME) scheme, respectively, for mRNA-4157 (V940) in combination with KEYTRUDA for the adjuvant treatment of patients with high-risk melanoma following complete resection. The companies recently announced the first presentation of the study’s primary endpoint, RFS, from the Phase 2 KEYNOTE-942/mRNA-4157-P201 trial in April 2023 at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting.

Adverse events reported with mRNA-4157 (V940) in KEYNOTE-942 were consistent with those previously observed in a Phase 1 clinical trial. The safety profile of KEYTRUDA was consistent with findings from previous studies. The number of patients reporting treatment related Grade ≥ 3 adverse events were similar between the arms (25% vs 18%, respectively). The most common adverse events of any grade attributed to either mRNA-4157 (V940) or the combination of mRNA-4157 (V940) and KEYTRUDA were fatigue (60.6%), injection site pain (55.8%) and chills (50.0%).

Exploratory Subgroup Analysis Evaluating Minimal Residual Disease by ctDNA

Data from an exploratory subgroup analysis of KEYNOTE-942/mRNA-4157-P201 (Abstract #LBA9515) evaluating minimal residual disease (MRD) by circulating tumor DNA (ctDNA) as a biomarker of RFS in resected high-risk melanoma patients treated with mRNA-4157 (V940) in combination with KEYTRUDA were also presented. For ctDNA assessments, tumor core biopsies and matched whole-blood samples were subjected to whole-exome sequencing to identify patient-specific somatic variants. The personalized amplicon-based next-generation sequencing assay from NeoGenomics (RaDaR) was used to select up to 48 variants most suitable for MRD detection and analysis of ctDNA in baseline plasma samples. The ctDNA-evaluable population (n=125) across both study arms was representative of the total ITT population (n=157). The majority of ctDNA-evaluable patients were ctDNA-negative at baseline (88.0%, n=110/125), compared to ctDNA-positive patients at baseline (12.0%, n=15/125). In ctDNA-negative patients at baseline, RFS was higher with mRNA-4157 (V940) in combination with KEYTRUDA (n=77) versus KEYTRUDA monotherapy (n=33), representing a 78% reduction in recurrence or death (HR=0.225 [95% CI 0.095-0.531]). A similar trend was observed for ctDNA-positive patients (n=13 for the combination arm; n=2 for KEYTRUDA only) at baseline. However, the small sample size of the ctDNA subgroups limits the interpretation of these results. The association between MRD patterns and mRNA-4157 (V940) treatment effect will be further explored in upcoming planned studies.

About mRNA-4157 (V940)

mRNA-4157 (V940) is a novel investigational messenger ribonucleic acid (mRNA)-based individualized neoantigen therapy1 consisting of a single synthetic mRNA coding for up to 34 neoantigens that is designed and produced based on the unique mutational signature of the DNA sequence of the patient’s tumor. Upon administration into the body, the algorithmically derived and RNA-encoded neoantigen sequences are endogenously translated and undergo natural cellular antigen processing and presentation, a key step in adaptive immunity.

Individualized neoantigen therapies are designed to prime the immune system so that a patient can generate an antitumor response specific to their tumor mutation signature. mRNA-4157 (V940) is designed to stimulate an immune response by generating specific T cell responses based on the unique mutational signature of a patient’s tumor. KEYTRUDA is an immunotherapy that works by increasing the ability of the body’s immune system to help detect and fight tumor cells. Based on early clinical studies, combining mRNA-4157 (V940) with KEYTRUDA may potentially provide an additive benefit and enhance T cell-mediated destruction of tumor cells.

About KEYNOTE-942/mRNA-4157-P201 (NCT03897881)

KEYNOTE-942 is an ongoing randomized, open-label Phase 2b trial that enrolled 157 patients with high-risk stage III/IV melanoma. Following complete surgical resection, patients were randomized 2:1 (stratified by stage) to receive mRNA-4157 (V940) (1 mg every three weeks for nine doses) and KEYTRUDA (200 mg every three weeks up to 18 cycles [for approximately one year]) versus KEYTRUDA alone for approximately one year until disease recurrence or unacceptable toxicity. The primary endpoint is RFS, defined as the time from first dose of KEYTRUDA until the date of first recurrence (local, regional, or distant metastasis), a new primary melanoma, or death from any cause in the intention-to-treat population. Secondary endpoints include DMFS and safety, and exploratory endpoints include distribution of TMB expression in baseline tumor samples across study arms and their association with the primary RFS endpoint.

Key eligibility criteria for the trial included: patients with resectable cutaneous melanoma metastatic to a lymph node and at high risk of recurrence, patients with complete resection within 13 weeks prior to the first dose of KEYTRUDA, patients were disease free at study entry (after surgery) with no loco-regional relapse or distant metastasis and no clinical evidence of brain metastases, patients had a formalin fixed paraffin embedded (FFPE) tumor sample available suitable for sequencing, Eastern Cooperative Oncology Group (ECOG) Performance Status 0 or 1 and patients with normal organ and marrow function reported at screening.

About melanoma

Melanoma, the most serious form of skin cancer, is characterized by the uncontrolled growth of pigment-producing cells. The rates of melanoma have been rising over the past few decades, with nearly 325,000 new cases diagnosed worldwide in 2020. In the U.S., skin cancer is one of the most common types of cancer diagnosed, and melanoma accounts for a large majority of skin cancer deaths. It is estimated there will be nearly 100,000 new cases of melanoma diagnosed and almost 8,000 deaths resulting from the disease in the U.S. in 2023. The five-year survival rates are estimated to be approximately 60.3% for stage III and 16.2% for stage IV.

About KEYTRUDA (pembrolizumab) injection, 100 mg

KEYTRUDA is an anti-programmed death receptor-1 (PD-1) therapy that works by increasing the ability of the body’s immune system to help detect and fight tumor cells. KEYTRUDA is a humanized monoclonal antibody that blocks the interaction between PD-1 and its ligands, PD-L1 and PD-L2, thereby activating T lymphocytes which may affect both tumor cells and healthy cells.

Merck has the industry’s largest immuno-oncology clinical research program. There are currently more than 1,600 trials studying KEYTRUDA across a wide variety of cancers and treatment settings. The KEYTRUDA clinical program seeks to understand the role of KEYTRUDA across cancers and the factors that may predict a patient’s likelihood of benefitting from treatment with KEYTRUDA, including exploring several different biomarkers.

Selected KEYTRUDA (pembrolizumab) Indications in the U.S.

Melanoma

KEYTRUDA is indicated for the treatment of patients with unresectable or metastatic melanoma.

KEYTRUDA is indicated for the adjuvant treatment of adult and pediatric (12 years and older) patients with stage IIB, IIC, or III melanoma following complete resection.

See additional selected indications for KEYTRUDA in the U.S. after the Selected Important Safety Information

Selected Important Safety Information for KEYTRUDA

Severe and Fatal Immune-Mediated Adverse Reactions

KEYTRUDA is a monoclonal antibody that belongs to a class of drugs that bind to either the PD-1 or the PD-L1, blocking the PD-1/PD-L1 pathway, thereby removing inhibition of the immune response, potentially breaking peripheral tolerance and inducing immune-mediated adverse reactions. Immune-mediated adverse reactions, which may be severe or fatal, can occur in any organ system or tissue, can affect more than one body system simultaneously, and can occur at any time after starting treatment or after discontinuation of treatment. Important immune-mediated adverse reactions listed here may not include all possible severe and fatal immune-mediated adverse reactions.

Monitor patients closely for symptoms and signs that may be clinical manifestations of underlying immune-mediated adverse reactions. Early identification and management are essential to ensure safe use of anti-PD-1/PD-L1 treatments. Evaluate liver enzymes, creatinine, and thyroid function at baseline and periodically during treatment. For patients with TNBC treated with KEYTRUDA in the neoadjuvant setting, monitor blood cortisol at baseline, prior to surgery, and as clinically indicated. In cases of suspected immune-mediated adverse reactions, initiate appropriate workup to exclude alternative etiologies, including infection. Institute medical management promptly, including specialty consultation as appropriate.

Withhold or permanently discontinue KEYTRUDA depending on severity of the immune-mediated adverse reaction. In general, if KEYTRUDA requires interruption or discontinuation, administer systemic corticosteroid therapy (1 to 2 mg/kg/day prednisone or equivalent) until improvement to Grade 1 or less. Upon improvement to Grade 1 or less, initiate corticosteroid taper and continue to taper over at least 1 month. Consider administration of other systemic immunosuppressants in patients whose adverse reactions are not controlled with corticosteroid therapy.

Immune-Mediated Pneumonitis

KEYTRUDA can cause immune-mediated pneumonitis. The incidence is higher in patients who have received prior thoracic radiation. Immune-mediated pneumonitis occurred in 3.4% (94/2799) of patients receiving KEYTRUDA, including fatal (0.1%), Grade 4 (0.3%), Grade 3 (0.9%), and Grade 2 (1.3%) reactions. Systemic corticosteroids were required in 67% (63/94) of patients. Pneumonitis led to permanent discontinuation of KEYTRUDA in 1.3% (36) and withholding in 0.9% (26) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, 23% had recurrence. Pneumonitis resolved in 59% of the 94 patients.

Pneumonitis occurred in 8% (31/389) of adult patients with cHL receiving KEYTRUDA as a single agent, including Grades 3-4 in 2.3% of patients. Patients received high-dose corticosteroids for a median duration of 10 days (range: 2 days to 53 months). Pneumonitis rates were similar in patients with and without prior thoracic radiation. Pneumonitis led to discontinuation of KEYTRUDA in 5.4% (21) of patients. Of the patients who developed pneumonitis, 42% interrupted KEYTRUDA, 68% discontinued KEYTRUDA, and 77% had resolution.

Pneumonitis occurred in 41 (7%) patients, including fatal (0.2%), Grade 4 (0.3%), and Grade 3 (1%) adverse reactions. In adult patients who received adjuvant therapy for NSCLC, patients received high-dose corticosteroids for a median duration of 10 days (range: 1 day to 2.3 months). Pneumonitis led to discontinuation of KEYTRUDA in 26 (4.5%) of patients. Of the patients who developed pneumonitis, 54% interrupted KEYTRUDA, 63% discontinued KEYTRUDA, and 71% had resolution.

Immune-Mediated Colitis

KEYTRUDA can cause immune-mediated colitis, which may present with diarrhea. Cytomegalovirus infection/reactivation has been reported in patients with corticosteroid-refractory immune-mediated colitis. In cases of corticosteroid-refractory colitis, consider repeating infectious workup to exclude alternative etiologies. Immune-mediated colitis occurred in 1.7% (48/2799) of patients receiving KEYTRUDA, including Grade 4 (<0.1%), Grade 3 (1.1%), and Grade 2 (0.4%) reactions. Systemic corticosteroids were required in 69% (33/48); additional immunosuppressant therapy was required in 4.2% of patients. Colitis led to permanent discontinuation of KEYTRUDA in 0.5% (15) and withholding in 0.5% (13) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, 23% had recurrence. Colitis resolved in 85% of the 48 patients.

Hepatotoxicity and Immune-Mediated Hepatitis

KEYTRUDA as a Single Agent

KEYTRUDA can cause immune-mediated hepatitis. Immune-mediated hepatitis occurred in 0.7% (19/2799) of patients receiving KEYTRUDA, including Grade 4 (<0.1%), Grade 3 (0.4%), and Grade 2 (0.1%) reactions. Systemic corticosteroids were required in 68% (13/19) of patients; additional immunosuppressant therapy was required in 11% of patients. Hepatitis led to permanent discontinuation of KEYTRUDA in 0.2% (6) and withholding in 0.3% (9) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, none had recurrence. Hepatitis resolved in 79% of the 19 patients.

KEYTRUDA With Axitinib

KEYTRUDA in combination with axitinib can cause hepatic toxicity. Monitor liver enzymes before initiation of and periodically throughout treatment. Consider monitoring more frequently as compared to when the drugs are administered as single agents. For elevated liver enzymes, interrupt KEYTRUDA and axitinib, and consider administering corticosteroids as needed. With the combination of KEYTRUDA and axitinib, Grades 3 and 4 increased alanine aminotransferase (ALT) (20%) and increased aspartate aminotransferase (AST) (13%) were seen at a higher frequency compared to KEYTRUDA alone. Fifty-nine percent of the patients with increased ALT received systemic corticosteroids. In patients with ALT ≥3 times upper limit of normal (ULN) (Grades 2-4, n=116), ALT resolved to Grades 0-1 in 94%. Among the 92 patients who were rechallenged with either KEYTRUDA (n=3) or axitinib (n=34) administered as a single agent or with both (n=55), recurrence of ALT ≥3 times ULN was observed in 1 patient receiving KEYTRUDA, 16 patients receiving axitinib, and 24 patients receiving both. All patients with a recurrence of ALT ≥3 ULN subsequently recovered from the event.

Immune-Mediated Endocrinopathies

Adrenal Insufficiency

KEYTRUDA can cause primary or secondary adrenal insufficiency. For Grade 2 or higher, initiate symptomatic treatment, including hormone replacement as clinically indicated. Withhold KEYTRUDA depending on severity. Adrenal insufficiency occurred in 0.8% (22/2799) of patients receiving KEYTRUDA, including Grade 4 (<0.1%), Grade 3 (0.3%), and Grade 2 (0.3%) reactions. Systemic corticosteroids were required in 77% (17/22) of patients; of these, the majority remained on systemic corticosteroids. Adrenal insufficiency led to permanent discontinuation of KEYTRUDA in <0.1% (1) and withholding in 0.3% (8) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement.

Hypophysitis

KEYTRUDA can cause immune-mediated hypophysitis. Hypophysitis can present with acute symptoms associated with mass effect such as headache, photophobia, or visual field defects. Hypophysitis can cause hypopituitarism. Initiate hormone replacement as indicated. Withhold or permanently discontinue KEYTRUDA depending on severity. Hypophysitis occurred in 0.6% (17/2799) of patients receiving KEYTRUDA, including Grade 4 (<0.1%), Grade 3 (0.3%), and Grade 2 (0.2%) reactions. Systemic corticosteroids were required in 94% (16/17) of patients; of these, the majority remained on systemic corticosteroids. Hypophysitis led to permanent discontinuation of KEYTRUDA in 0.1% (4) and withholding in 0.3% (7) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement.

Thyroid Disorders

KEYTRUDA can cause immune-mediated thyroid disorders. Thyroiditis can present with or without endocrinopathy. Hypothyroidism can follow hyperthyroidism. Initiate hormone replacement for hypothyroidism or institute medical management of hyperthyroidism as clinically indicated. Withhold or permanently discontinue KEYTRUDA depending on severity. Thyroiditis occurred in 0.6% (16/2799) of patients receiving KEYTRUDA, including Grade 2 (0.3%). None discontinued, but KEYTRUDA was withheld in <0.1% (1) of patients.

Hyperthyroidism occurred in 3.4% (96/2799) of patients receiving KEYTRUDA, including Grade 3 (0.1%) and Grade 2 (0.8%). It led to permanent discontinuation of KEYTRUDA in <0.1% (2) and withholding in 0.3% (7) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement. Hypothyroidism occurred in 8% (237/2799) of patients receiving KEYTRUDA, including Grade 3 (0.1%) and Grade 2 (6.2%). It led to permanent discontinuation of KEYTRUDA in <0.1% (1) and withholding in 0.5% (14) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement. The majority of patients with hypothyroidism required long-term thyroid hormone replacement. The incidence of new or worsening hypothyroidism was higher in 1185 patients with HNSCC, occurring in 16% of patients receiving KEYTRUDA as a single agent or in combination with platinum and FU, including Grade 3 (0.3%) hypothyroidism. The incidence of new or worsening hypothyroidism was higher in 389 adult patients with cHL (17%) receiving KEYTRUDA as a single agent, including Grade 1 (6.2%) and Grade 2 (10.8%) hypothyroidism. The incidence of new or worsening hyperthyroidism was higher in 580 patients with resected NSCLC, occurring in 11% of patients receiving KEYTRUDA as a single agent as adjuvant treatment, including Grade 3 (0.2%) hyperthyroidism. The incidence of new or worsening hypothyroidism was higher in 580 patients with resected NSCLC, occurring in 22% of patients receiving KEYTRUDA as a single agent as adjuvant treatment (KEYNOTE-091), including Grade 3 (0.3%) hypothyroidism.

Type 1 Diabetes Mellitus (DM), Which Can Present With Diabetic Ketoacidosis

Monitor patients for hyperglycemia or other signs and symptoms of diabetes. Initiate treatment with insulin as clinically indicated. Withhold KEYTRUDA depending on severity. Type 1 DM occurred in 0.2% (6/2799) of patients receiving KEYTRUDA. It led to permanent discontinuation in <0.1% (1) and withholding of KEYTRUDA in <0.1% (1) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement.

Immune-Mediated Nephritis With Renal Dysfunction

KEYTRUDA can cause immune-mediated nephritis. Immune-mediated nephritis occurred in 0.3% (9/2799) of patients receiving KEYTRUDA, including Grade 4 (<0.1%), Grade 3 (0.1%), and Grade 2 (0.1%) reactions. Systemic corticosteroids were required in 89% (8/9) of patients. Nephritis led to permanent discontinuation of KEYTRUDA in 0.1% (3) and withholding in 0.1% (3) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, none had recurrence. Nephritis resolved in 56% of the 9 patients.

Immune-Mediated Dermatologic Adverse Reactions

KEYTRUDA can cause immune-mediated rash or dermatitis. Exfoliative dermatitis, including Stevens-Johnson syndrome, drug rash with eosinophilia and systemic symptoms, and toxic epidermal necrolysis, has occurred with anti-PD-1/PD-L1 treatments. Topical emollients and/or topical corticosteroids may be adequate to treat mild to moderate nonexfoliative rashes. Withhold or permanently discontinue KEYTRUDA depending on severity. Immune-mediated dermatologic adverse reactions occurred in 1.4% (38/2799) of patients receiving KEYTRUDA, including Grade 3 (1%) and Grade 2 (0.1%) reactions. Systemic corticosteroids were required in 40% (15/38) of patients. These reactions led to permanent discontinuation in 0.1% (2) and withholding of KEYTRUDA in 0.6% (16) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, 6% had recurrence. The reactions resolved in 79% of the 38 patients.

Other Immune-Mediated Adverse Reactions

The following clinically significant immune-mediated adverse reactions occurred at an incidence of <1% (unless otherwise noted) in patients who received KEYTRUDA or were reported with the use of other anti-PD-1/PD-L1 treatments. Severe or fatal cases have been reported for some of these adverse reactions. Cardiac/Vascular: Myocarditis, pericarditis, vasculitis; Nervous System: Meningitis, encephalitis, myelitis and demyelination, myasthenic syndrome/myasthenia gravis (including exacerbation), Guillain-Barré syndrome, nerve paresis, autoimmune neuropathy; Ocular: Uveitis, iritis and other ocular inflammatory toxicities can occur. Some cases can be associated with retinal detachment. Various grades of visual impairment, including blindness, can occur. If uveitis occurs in combination with other immune-mediated adverse reactions, consider a Vogt-Koyanagi-Harada-like syndrome, as this may require treatment with systemic steroids to reduce the risk of permanent vision loss; Gastrointestinal: Pancreatitis, to include increases in serum amylase and lipase levels, gastritis, duodenitis; Musculoskeletal and Connective Tissue: Myositis/polymyositis, rhabdomyolysis (and associated sequelae, including renal failure), arthritis (1.5%), polymyalgia rheumatica; Endocrine: Hypoparathyroidism; Hematologic/Immune: Hemolytic anemia, aplastic anemia, hemophagocytic lymphohistiocytosis, systemic inflammatory response syndrome, histiocytic necrotizing lymphadenitis (Kikuchi lymphadenitis), sarcoidosis, immune thrombocytopenic purpura, solid organ transplant rejection.

Infusion-Related Reactions

KEYTRUDA can cause severe or life-threatening infusion-related reactions, including hypersensitivity and anaphylaxis, which have been reported in 0.2% of 2799 patients receiving KEYTRUDA. Monitor for signs and symptoms of infusion-related reactions. Interrupt or slow the rate of infusion for Grade 1 or Grade 2 reactions. For Grade 3 or Grade 4 reactions, stop infusion and permanently discontinue KEYTRUDA.

Complications of Allogeneic Hematopoietic Stem Cell Transplantation (HSCT)

Fatal and other serious complications can occur in patients who receive allogeneic HSCT before or after anti-PD-1/PD-L1 treatments. Transplant-related complications include hyperacute graft-versus-host disease (GVHD), acute and chronic GVHD, hepatic veno-occlusive disease after reduced intensity conditioning, and steroid-requiring febrile syndrome (without an identified infectious cause). These complications may occur despite intervening therapy between anti-PD-1/PD-L1 treatment and allogeneic HSCT. Follow patients closely for evidence of these complications and intervene promptly. Consider the benefit vs risks of using anti-PD-1/PD-L1 treatments prior to or after an allogeneic HSCT.

Increased Mortality in Patients With Multiple Myeloma

In trials in patients with multiple myeloma, the addition of KEYTRUDA to a thalidomide analogue plus dexamethasone resulted in increased mortality. Treatment of these patients with an anti-PD-1/PD-L1 treatment in this combination is not recommended outside of controlled trials.

Embryofetal Toxicity

Based on its mechanism of action, KEYTRUDA can cause fetal harm when administered to a pregnant woman. Advise women of this potential risk. In females of reproductive potential, verify pregnancy status prior to initiating KEYTRUDA and advise them to use effective contraception during treatment and for 4 months after the last dose.

Adverse Reactions

In KEYNOTE-006, KEYTRUDA was discontinued due to adverse reactions in 9% of 555 patients with advanced melanoma; adverse reactions leading to permanent discontinuation in more than one patient were colitis (1.4%), autoimmune hepatitis (0.7%), allergic reaction (0.4%), polyneuropathy (0.4%), and cardiac failure (0.4%). The most common adverse reactions (≥20%) with KEYTRUDA were fatigue (28%), diarrhea (26%), rash (24%), and nausea (21%).

In KEYNOTE-054, when KEYTRUDA was administered as a single agent to patients with stage III melanoma, KEYTRUDA was permanently discontinued due to adverse reactions in 14% of 509 patients; the most common (≥1%) were pneumonitis (1.4%), colitis (1.2%), and diarrhea (1%). Serious adverse reactions occurred in 25% of patients receiving KEYTRUDA. The most common adverse reaction (≥20%) with KEYTRUDA was diarrhea (28%). In KEYNOTE-716, when KEYTRUDA was administered as a single agent to patients with stage IIB or IIC melanoma, adverse reactions occurring in patients with stage IIB or IIC melanoma were similar to those occurring in 1011 patients with stage III melanoma from KEYNOTE-054.

In KEYNOTE-189, when KEYTRUDA was administered with pemetrexed and platinum chemotherapy in metastatic nonsquamous NSCLC, KEYTRUDA was discontinued due to adverse reactions in 20% of 405 patients. The most common adverse reactions resulting in permanent discontinuation of KEYTRUDA were pneumonitis (3%) and acute kidney injury (2%). The most common adverse reactions (≥20%) with KEYTRUDA were nausea (56%), fatigue (56%), constipation (35%), diarrhea (31%), decreased appetite (28%), rash (25%), vomiting (24%), cough (21%), dyspnea (21%), and pyrexia (20%).

In KEYNOTE-407, when KEYTRUDA was administered with carboplatin and either paclitaxel or paclitaxel protein-bound in metastatic squamous NSCLC, KEYTRUDA was discontinued due to adverse reactions in 15% of 101 patients. The most frequent serious adverse reactions reported in at least 2% of patients were febrile neutropenia, pneumonia, and urinary tract infection. Adverse reactions observed in KEYNOTE-407 were similar to those observed in KEYNOTE-189 with the exception that increased incidences of alopecia (47% vs 36%) and peripheral neuropathy (31% vs 25%) were observed in the KEYTRUDA and chemotherapy arm compared to the placebo and chemotherapy arm in KEYNOTE-407.

In KEYNOTE-042, KEYTRUDA was discontinued due to adverse reactions in 19% of 636 patients with advanced NSCLC; the most common were pneumonitis (3%), death due to unknown cause (1.6%), and pneumonia (1.4%). The most frequent serious adverse reactions reported in at least 2% of patients were pneumonia (7%), pneumonitis (3.9%), pulmonary embolism (2.4%), and pleural effusion (2.2%). The most common adverse reaction (≥20%) was fatigue (25%).

In KEYNOTE-010, KEYTRUDA monotherapy was discontinued due to adverse reactions in 8% of 682 patients with metastatic NSCLC; the most common was pneumonitis (1.8%). The most common adverse reactions (≥20%) were decreased appetite (25%), fatigue (25%), dyspnea (23%), and nausea (20%).

Adverse reactions observed in KEYNOTE-091 were generally similar to those occurring in other patients with NSCLC receiving KEYTRUDA as a single agent, with the exception of hypothyroidism (22%), hyperthyroidism (11%), and pneumonitis (7%). Two fatal reactions of myocarditis occurred.

In KEYNOTE-048, KEYTRUDA monotherapy was discontinued due to adverse events in 12% of 300 patients with HNSCC; the most common adverse reactions leading to permanent discontinuation were sepsis (1.7%) and pneumonia (1.3%). The most common adverse reactions (≥20%) were fatigue (33%), constipation (20%), and rash (20%).

In KEYNOTE-048, when KEYTRUDA was administered in combination with platinum (cisplatin or carboplatin) and FU chemotherapy, KEYTRUDA was discontinued due to adverse reactions in 16% of 276 patients with HNSCC. The most common adverse reactions resulting in permanent discontinuation of KEYTRUDA were pneumonia (2.5%), pneumonitis (1.8%), and septic shock (1.4%). The most common adverse reactions (≥20%) were nausea (51%), fatigue (49%), constipation (37%), vomiting (32%), mucosal inflammation (31%), diarrhea (29%), decreased appetite (29%), stomatitis (26%), and cough (22%).

In KEYNOTE-012, KEYTRUDA was discontinued due to adverse reactions in 17% of 192 patients with HNSCC. Serious adverse reactions occurred in 45% of patients. The most frequent serious adverse reactions reported in at least 2% of patients were pneumonia, dyspnea, confusional state, vomiting, pleural effusion, and respiratory failure. The most common adverse reactions (≥20%) were fatigue, decreased appetite, and dyspnea. Adverse reactions occurring in patients with HNSCC were generally similar to those occurring in patients with melanoma or NSCLC who received KEYTRUDA as a monotherapy, with the exception of increased incidences of facial edema and new or worsening hypothyroidism.

In KEYNOTE-204, KEYTRUDA was discontinued due to adverse reactions in 14% of 148 patients with cHL. Serious adverse reactions occurred in 30% of patients receiving KEYTRUDA; those ≥1% were pneumonitis, pneumonia, pyrexia, myocarditis, acute kidney injury, febrile neutropenia, and sepsis. Three patients died from causes other than disease progression: 2 from complications after allogeneic HSCT and 1 from unknown cause. The most common adverse reactions (≥20%) were upper respiratory tract infection (41%), musculoskeletal pain (32%), diarrhea (22%), and pyrexia, fatigue, rash, and cough (20% each).

In KEYNOTE-087, KEYTRUDA was discontinued due to adverse reactions in 5% of 210 patients with cHL. Serious adverse reactions occurred in 16% of patients; those ≥1% were pneumonia, pneumonitis, pyrexia, dyspnea, GVHD, and herpes zoster. Two patients died from causes other than disease progression: 1 from GVHD after subsequent allogeneic HSCT and 1 from septic shock. The most common adverse reactions (≥20%) were fatigue (26%), pyrexia (24%), cough (24%), musculoskeletal pain (21%), diarrhea (20%), and rash (20%).

In KEYNOTE-170, KEYTRUDA was discontinued due to adverse reactions in 8% of 53 patients with PMBCL. Serious adverse reactions occurred in 26% of patients and included arrhythmia (4%), cardiac tamponade (2%), myocardial infarction (2%), pericardial effusion (2%), and pericarditis (2%). Six (11%) patients died within 30 days of start of treatment. The most common adverse reactions (≥20%) were musculoskeletal pain (30%), upper respiratory tract infection and pyrexia (28% each), cough (26%), fatigue (23%), and dyspnea (21%).

In KEYNOTE-869, when KEYTRUDA was administered in combination with enfortumab vedotin to patients with locally advanced or mUC and who are not eligible for cisplatin-based chemotherapy (n=121), fatal adverse reactions occurred in 5% of patients, including sepsis (1.6%), bullous dermatitis (0.8%), myasthenia gravis (0.8%), and pneumonitis (0.8%). Serious adverse reactions occurred in 50% of patients receiving KEYTRUDA in combination with enfortumab vedotin; the serious adverse reactions in ≥2% of patients were acute kidney injury (7%), urinary tract infection (7%), urosepsis (5%), hematuria (3.3%), pneumonia (3.3%), pneumonitis (3.3%), sepsis (3.3%), anemia (2.5%), diarrhea (2.5%), hypotension (2.5%), myasthenia gravis (2.5%), myositis (2.5%), and urinary retention (2.5%). Permanent discontinuation of KEYTRUDA occurred in 32% of patients. The most common adverse reactions (≥2%) resulting in permanent discontinuation of KEYTRUDA were pneumonitis (5%), peripheral neuropathy (5%), rash (3.3%), and myasthenia gravis (2.5%). The most common adverse reactions (≥20%) occurring in patients treated with KEYTRUDA in combination with enfortumab vedotin were rash (71%), peripheral neuropathy (65%), fatigue (60%), alopecia (52%), weight loss (48%), diarrhea (45%), pruritus (40%), decreased appetite (38%), nausea (36%), dysgeusia (35%), urinary tract infection (30%), constipation (27%), peripheral edema (26%), dry eye (25%), dizziness (23%), arthralgia (23%), and dry skin (21%).

In KEYNOTE-052, KEYTRUDA was discontinued due to adverse reactions in 11% of 370 patients with locally advanced or mUC. Serious adverse reactions occurred in 42% of patients; those ≥2% were urinary tract infection, hematuria, acute kidney injury, pneumonia, and urosepsis. The most common adverse reactions (≥20%) were fatigue (38%), musculoskeletal pain (24%), decreased appetite (22%), constipation (21%), rash (21%), and diarrhea (20%).

In KEYNOTE-045, KEYTRUDA was discontinued due to adverse reactions in 8% of 266 patients with locally advanced or mUC. The most common adverse reaction resulting in permanent discontinuation of KEYTRUDA was pneumonitis (1.9%). Serious adverse reactions occurred in 39% of KEYTRUDA-treated patients; those ≥2% were urinary tract infection, pneumonia, anemia, and pneumonitis. The most common adverse reactions (≥20%) in patients who received KEYTRUDA were fatigue (38%), musculoskeletal pain (32%), pruritus (23%), decreased appetite (21%), nausea (21%), and rash (20%).

In KEYNOTE-057, KEYTRUDA was discontinued due to adverse reactions in 11% of 148 patients with high-risk NMIBC. The most common adverse reaction resulting in permanent discontinuation of KEYTRUDA was pneumonitis (1.4%). Serious adverse reactions occurred in 28% of patients; those ≥2% were pneumonia (3%), cardiac ischemia (2%), colitis (2%), pulmonary embolism (2%), sepsis (2%), and urinary tract infection (2%). The most common adverse reactions (≥20%) were fatigue (29%), diarrhea (24%), and rash (24%).

Adverse reactions occurring in patients with MSI-H or dMMR CRC were similar to those occurring in patients with melanoma or NSCLC who received KEYTRUDA as a monotherapy.

In KEYNOTE-158 and KEYNOTE-164, adverse reactions occurring in patients with MSI-H or dMMR cancer were similar to those occurring in patients with other solid tumors who received KEYTRUDA as a single agent.

In KEYNOTE-811, when KEYTRUDA was administered in combination with trastuzumab, fluoropyrimidine- and platinum-containing chemotherapy, KEYTRUDA was discontinued due to adverse reactions in 6% of 217 patients with locally advanced unresectable or metastatic HER2+ gastric or GEJ adenocarcinoma. The most common adverse reaction resulting in permanent discontinuation was pneumonitis (1.4%). In the KEYTRUDA arm versus placebo, there was a difference of ≥5% incidence between patients treated with KEYTRUDA versus standard of care for diarrhea (53% vs 44%) and nausea (49% vs 44%).

The most common adverse reactions (reported in ≥20%) in patients receiving KEYTRUDA in combination with chemotherapy were fatigue/asthenia, nausea, constipation, diarrhea, decreased appetite, rash, vomiting, cough, dyspnea, pyrexia, alopecia, peripheral neuropathy, mucosal inflammation, stomatitis, headache, weight loss, abdominal pain, arthralgia, myalgia, and insomnia.

In KEYNOTE-590, when KEYTRUDA was administered with cisplatin and fluorouracil to patients with metastatic or locally advanced esophageal or GEJ (tumors with epicenter 1 to 5 centimeters above the GEJ) carcinoma who were not candidates for surgical resection or definitive chemoradiation, KEYTRUDA was discontinued due to adverse reactions in 15% of 370 patients. The most common adverse reactions resulting in permanent discontinuation of KEYTRUDA (≥1%) were pneumonitis (1.6%), acute kidney injury (1.1%), and pneumonia (1.1%). The most common adverse reactions (≥20%) with KEYTRUDA in combination with chemotherapy were nausea (67%), fatigue (57%), decreased appetite (44%), constipation (40%), diarrhea (36%), vomiting (34%), stomatitis (27%), and weight loss (24%).

Adverse reactions occurring in patients with esophageal cancer who received KEYTRUDA as a monotherapy were similar to those occurring in patients with melanoma or NSCLC who received KEYTRUDA as a monotherapy.

In KEYNOTE-826, when KEYTRUDA was administered in combination with paclitaxel and cisplatin or paclitaxel and carboplatin, with or without bevacizumab (n=307), to patients with persistent, recurrent, or first-line metastatic cervical cancer regardless of tumor PD-L1 expression who had not been treated with chemotherapy except when used concurrently as a radio-sensitizing agent, fatal adverse reactions occurred in 4.6% of patients, including 3 cases of hemorrhage, 2 cases each of sepsis and due to unknown causes, and 1 case each of acute myocardial infarction, autoimmune encephalitis, cardiac arrest, cerebrovascular accident, femur fracture with perioperative pulmonary embolus, intestinal perforation, and pelvic infection. Serious adverse reactions occurred in 50% of patients receiving KEYTRUDA in combination with chemotherapy with or without bevacizumab; those ≥3% were febrile neutropenia (6.8%), urinary tract infection (5.2%), anemia (4.6%), and acute kidney injury and sepsis (3.3% each).

KEYTRUDA was discontinued in 15% of patients due to adverse reactions. The most common adverse reaction resulting in permanent discontinuation (≥1%) was colitis (1%).

For patients treated with KEYTRUDA, chemotherapy, and bevacizumab (n=196), the most common adverse reactions (≥20%) were peripheral neuropathy (62%), alopecia (58%), anemia (55%), fatigue/asthenia (53%), nausea and neutropenia (41% each), diarrhea (39%), hypertension and thrombocytopenia (35% each), constipation and arthralgia (31% each), vomiting (30%), urinary tract infection (27%), rash (26%), leukopenia (24%), hypothyroidism (22%), and decreased appetite (21%).

For patients treated with KEYTRUDA in combination with chemotherapy with or without bevacizumab, the most common adverse reactions (≥20%) were peripheral neuropathy (58%), alopecia (56%), fatigue (47%), nausea (40%), diarrhea (36%), constipation (28%), arthralgia (27%), vomiting (26%), hypertension and urinary tract infection (24% each), and rash (22%).

In KEYNOTE-158, KEYTRUDA was discontinued due to adverse reactions in 8% of 98 patients with previously treated recurrent or metastatic cervical cancer. Serious adverse reactions occurred in 39% of patients receiving KEYTRUDA; the most frequent included anemia (7%), fistula, hemorrhage, and infections [except urinary tract infections] (4.1% each). The most common adverse reactions (≥20%) were fatigue (43%), musculoskeletal pain (27%), diarrhea (23%), pain and abdominal pain (22% each), and decreased appetite (21%).

Adverse reactions occurring in patients with HCC were generally similar to those in patients with melanoma or NSCLC who received KEYTRUDA as a monotherapy, with the exception of increased incidences of ascites (8% Grades 3-4) and immune-mediated hepatitis (2.9%). Laboratory abnormalities (Grades 3-4) that occurred at a higher incidence were elevated AST (20%), ALT (9%), and hyperbilirubinemia (10%).

Among the 50 patients with MCC enrolled in study KEYNOTE-017, adverse reactions occurring in patients with MCC were generally similar to those occurring in patients with melanoma or NSCLC who received KEYTRUDA as a monotherapy. Laboratory abnormalities (Grades 3-4) that occurred at a higher incidence were elevated AST (11%) and hyperglycemia (19%).

In KEYNOTE-426, when KEYTRUDA was administered in combination with axitinib, fatal adverse reactions occurred in 3.3% of 429 patients. Serious adverse reactions occurred in 40% of patients, the most frequent (≥1%) were hepatotoxicity (7%), diarrhea (4.2%), acute kidney injury (2.3%), dehydration (1%), and pneumonitis (1%). Permanent discontinuation due to an adverse reaction occurred in 31% of patients; KEYTRUDA only (13%), axitinib only (13%), and the combination (8%); the most common were hepatotoxicity (13%), diarrhea/colitis (1.9%), acute kidney injury (1.6%), and cerebrovascular accident (1.2%). The most common adverse reactions (≥20%) were diarrhea (56%), fatigue/asthenia (52%), hypertension (48%), hepatotoxicity (39%), hypothyroidism (35%), decreased appetite (30%), palmar-plantar erythrodysesthesia (28%), nausea (28%), stomatitis/mucosal inflammation (27%), dysphonia (25%), rash (25%), cough (21%), and constipation (21%).

In KEYNOTE-564, when KEYTRUDA was administered as a single agent for the adjuvant treatment of renal cell carcinoma, serious adverse reactions occurred in 20% of patients receiving KEYTRUDA; the serious adverse reactions (≥1%) were acute kidney injury, adrenal insufficiency, pneumonia, colitis, and diabetic ketoacidosis (1% each). Fatal adverse reactions occurred in 0.2% including 1 case of pneumonia. Discontinuation of KEYTRUDA due to adverse reactions occurred in 21% of 488 patients; the most common (≥1%) were increased ALT (1.6%), colitis (1%), and adrenal insufficiency (1%). The most common adverse reactions (≥20%) were musculoskeletal pain (41%), fatigue (40%), rash (30%), diarrhea (27%), pruritus (23%), and hypothyroidism (21%).

Adverse reactions occurring in patients with MSI-H or dMMR endometrial carcinoma who received KEYTRUDA as a single agent were similar to those occurring in patients with melanoma or NSCLC who received KEYTRUDA as a single agent.

Adverse reactions occurring in patients with TMB-H cancer were similar to those occurring in patients with other solid tumors who received KEYTRUDA as a single agent.

Adverse reactions occurring in patients with recurrent or metastatic cSCC or locally advanced cSCC were similar to those occurring in patients with melanoma or NSCLC who received KEYTRUDA as a monotherapy.

In KEYNOTE-522, when KEYTRUDA was administered with neoadjuvant chemotherapy (carboplatin and paclitaxel followed by doxorubicin or epirubicin and cyclophosphamide) followed by surgery and continued adjuvant treatment with KEYTRUDA as a single agent (n=778) to patients with newly diagnosed, previously untreated, high-risk early-stage TNBC, fatal adverse reactions occurred in 0.9% of patients, including 1 each of adrenal crisis, autoimmune encephalitis, hepatitis, pneumonia, pneumonitis, pulmonary embolism, and sepsis in association with multiple organ dysfunction syndrome and myocardial infarction. Serious adverse reactions occurred in 44% of patients receiving KEYTRUDA; those ≥2% were febrile neutropenia (15%), pyrexia (3.7%), anemia (2.6%), and neutropenia (2.2%). KEYTRUDA was discontinued in 20% of patients due to adverse reactions. The most common reactions (≥1%) resulting in permanent discontinuation were increased ALT (2.7%), increased AST (1.5%), and rash (1%). The most common adverse reactions (≥20%) in patients receiving KEYTRUDA were fatigue (70%), nausea (67%), alopecia (61%), rash (52%), constipation (42%), diarrhea and peripheral neuropathy (41% each), stomatitis (34%), vomiting (31%), headache (30%), arthralgia (29%), pyrexia (28%), cough (26%), abdominal pain (24%), decreased appetite (23%), insomnia (21%), and myalgia (20%).

In KEYNOTE-355, when KEYTRUDA and chemotherapy (paclitaxel, paclitaxel protein-bound, or gemcitabine and carboplatin) were administered to patients with locally recurrent unresectable or metastatic TNBC who had not been previously treated with chemotherapy in the metastatic setting (n=596), fatal adverse reactions occurred in 2.5% of patients, including cardio-respiratory arrest (0.7%) and septic shock (0.3%). Serious adverse reactions occurred in 30% of patients receiving KEYTRUDA in combination with chemotherapy; the serious reactions in ≥2% were pneumonia (2.9%), anemia (2.2%), and thrombocytopenia (2%). KEYTRUDA was discontinued in 11% of patients due to adverse reactions. The most common reactions resulting in permanent discontinuation (≥1%) were increased ALT (2.2%), increased AST (1.5%), and pneumonitis (1.2%). The most common adverse reactions (≥20%) in patients receiving KEYTRUDA in combination with chemotherapy were fatigue (48%), nausea (44%), alopecia (34%), diarrhea and constipation (28% each), vomiting and rash (26% each), cough (23%), decreased appetite (21%), and headache (20%).

Lactation

Because of the potential for serious adverse reactions in breastfed children, advise women not to breastfeed during treatment and for 4 months after the last dose.

Pediatric Use

In KEYNOTE-051, 173 pediatric patients (65 pediatric patients aged 6 months to younger than 12 years and 108 pediatric patients aged 12 years to 17 years) were administered KEYTRUDA 2 mg/kg every 3 weeks. The median duration of exposure was 2.1 months (range: 1 day to 25 months).

Adverse reactions that occurred at a ≥10% higher rate in pediatric patients when compared to adults were pyrexia (33%), leukopenia (31%), vomiting (29%), neutropenia (28%), headache (25%), abdominal pain (23%), thrombocytopenia (22%), anemia (17%), decreased lymphocyte count (13%), and decreased white blood cell count (11%).

Additional Indications for KEYTRUDA in the U.S.

Non-Small Cell Lung Cancer

KEYTRUDA, in combination with pemetrexed and platinum chemotherapy, is indicated for the first-line treatment of patients with metastatic nonsquamous non-small cell lung cancer (NSCLC), with no EGFR or ALK genomic tumor aberrations.

KEYTRUDA, in combination with carboplatin and either paclitaxel or paclitaxel protein-bound, is indicated for the first-line treatment of patients with metastatic squamous NSCLC.

KEYTRUDA, as a single agent, is indicated for the first-line treatment of patients with NSCLC expressing PD-L1 [tumor proportion score (TPS) ≥1%] as determined by an FDA-approved test, with no EGFR or ALK genomic tumor aberrations, and is:

stage III where patients are not candidates for surgical resection or definitive chemoradiation, or
metastatic.
KEYTRUDA, as a single agent, is indicated for the treatment of patients with metastatic NSCLC whose tumors express PD-L1 (TPS ≥1%) as determined by an FDA-approved test, with disease progression on or after platinum-containing chemotherapy. Patients with EGFR or ALK genomic tumor aberrations should have disease progression on FDA-approved therapy for these aberrations prior to receiving KEYTRUDA.

KEYTRUDA, as a single agent, is indicated as adjuvant treatment following resection and platinum-based chemotherapy for adult patients with stage IB (T2a ≥4 cm), II, or IIIA NSCLC.

Head and Neck Squamous Cell Cancer

KEYTRUDA, in combination with platinum and fluorouracil (FU), is indicated for the first-line treatment of patients with metastatic or with unresectable, recurrent head and neck squamous cell carcinoma (HNSCC).

KEYTRUDA, as a single agent, is indicated for the first-line treatment of patients with metastatic or with unresectable, recurrent HNSCC whose tumors express PD-L1 [Combined Positive Score (CPS) ≥1] as determined by an FDA-approved test.

KEYTRUDA, as a single agent, is indicated for the treatment of patients with recurrent or metastatic HNSCC with disease progression on or after platinum-containing chemotherapy.

Classical Hodgkin Lymphoma

KEYTRUDA is indicated for the treatment of adult patients with relapsed or refractory classical Hodgkin lymphoma (cHL).

KEYTRUDA is indicated for the treatment of pediatric patients with refractory cHL, or cHL that has relapsed after 2 or more lines of therapy.

Primary Mediastinal Large B-Cell Lymphoma

KEYTRUDA is indicated for the treatment of adult and pediatric patients with refractory primary mediastinal large B-cell lymphoma (PMBCL), or who have relapsed after 2 or more prior lines of therapy. KEYTRUDA is not recommended for treatment of patients with PMBCL who require urgent cytoreductive therapy.

Urothelial Carcinoma

KEYTRUDA, in combination with enfortumab vedotin, is indicated for the treatment of adult patients with locally advanced or metastatic urothelial carcinoma (mUC) who are not eligible for cisplatin-containing chemotherapy.

This indication is approved under accelerated approval based on tumor response rate and durability of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the confirmatory trials.

KEYTRUDA, as a single agent, is indicated for the treatment of patients with locally advanced or metastatic urothelial carcinoma (mUC):

who are not eligible for any platinum-containing chemotherapy, or
who have disease progression during or following platinum-containing chemotherapy or within 12 months of neoadjuvant or adjuvant treatment with platinum-containing chemotherapy.
KEYTRUDA, as a single agent, is indicated for the treatment of patients with Bacillus Calmette-Guerin (BCG)-unresponsive, high-risk, non-muscle invasive bladder cancer (NMIBC) with carcinoma in situ (CIS) with or without papillary tumors who are ineligible for or have elected not to undergo cystectomy.

Microsatellite Instability-High or Mismatch Repair Deficient Cancer

KEYTRUDA is indicated for the treatment of adult and pediatric patients with unresectable or metastatic microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) solid tumors, as determined by an FDA-approved test, that have progressed following prior treatment and who have no satisfactory alternative treatment options.

Microsatellite Instability-High or Mismatch Repair Deficient Colorectal Cancer

KEYTRUDA is indicated for the treatment of patients with unresectable or metastatic MSI-H or dMMR colorectal cancer (CRC) as determined by an FDA-approved test.

Gastric Cancer

KEYTRUDA, in combination with trastuzumab, fluoropyrimidine- and platinum-containing chemotherapy, is indicated for the first-line treatment of patients with locally advanced unresectable or metastatic HER2-positive gastric or gastroesophageal junction (GEJ) adenocarcinoma.

This indication is approved under accelerated approval based on tumor response rate and durability of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the confirmatory trials.

Esophageal Cancer

KEYTRUDA is indicated for the treatment of patients with locally advanced or metastatic esophageal or gastroesophageal junction (GEJ) (tumors with epicenter 1 to 5 centimeters above the GEJ) carcinoma that is not amenable to surgical resection or definitive chemoradiation either:

in combination with platinum- and fluoropyrimidine-based chemotherapy, or
as a single agent after one or more prior lines of systemic therapy for patients with tumors of squamous cell histology that express PD-L1 (CPS ≥10) as determined by an FDA-approved test.
Cervical Cancer

KEYTRUDA, in combination with chemotherapy, with or without bevacizumab, is indicated for the treatment of patients with persistent, recurrent, or metastatic cervical cancer whose tumors express PD-L1 (CPS ≥1) as determined by an FDA-approved test.

KEYTRUDA, as a single agent, is indicated for the treatment of patients with recurrent or metastatic cervical cancer with disease progression on or after chemotherapy whose tumors express PD-L1 (CPS ≥1) as determined by an FDA-approved test.

Hepatocellular Carcinoma

KEYTRUDA is indicated for the treatment of patients with hepatocellular carcinoma (HCC) who have been previously treated with sorafenib. This indication is approved under accelerated approval based on tumor response rate and durability of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the confirmatory trials.

Merkel Cell Carcinoma

KEYTRUDA is indicated for the treatment of adult and pediatric patients with recurrent locally advanced or metastatic Merkel cell carcinoma (MCC). This indication is approved under accelerated approval based on tumor response rate and durability of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the confirmatory trials.

Renal Cell Carcinoma

KEYTRUDA, in combination with axitinib, is indicated for the first-line treatment of adult patients with advanced renal cell carcinoma (RCC).

KEYTRUDA is indicated for the adjuvant treatment of patients with RCC at intermediate-high or high risk of recurrence following nephrectomy, or following nephrectomy and resection of metastatic lesions.

Endometrial Carcinoma

KEYTRUDA, as a single agent, is indicated for the treatment of patients with advanced endometrial carcinoma that is MSI-H or dMMR, as determined by an FDA-approved test, who have disease progression following prior systemic therapy in any setting and are not candidates for curative surgery or radiation.

Tumor Mutational Burden-High Cancer

KEYTRUDA is indicated for the treatment of adult and pediatric patients with unresectable or metastatic tumor mutational burden-high (TMB-H) [≥10 mutations/megabase] solid tumors, as determined by an FDA-approved test, that have progressed following prior treatment and who have no satisfactory alternative treatment options. This indication is approved under accelerated approval based on tumor response rate and durability of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the confirmatory trials. The safety and effectiveness of KEYTRUDA in pediatric patients with TMB-H central nervous system cancers have not been established.

Cutaneous Squamous Cell Carcinoma

KEYTRUDA is indicated for the treatment of patients with recurrent or metastatic cutaneous squamous cell carcinoma (cSCC) or locally advanced cSCC that is not curable by surgery or radiation.

Triple-Negative Breast Cancer

KEYTRUDA is indicated for the treatment of patients with high-risk early-stage triple-negative breast cancer (TNBC) in combination with chemotherapy as neoadjuvant treatment, and then continued as a single agent as adjuvant treatment after surgery.

KEYTRUDA, in combination with chemotherapy, is indicated for the treatment of patients with locally recurrent unresectable or metastatic TNBC whose tumors express PD-L1 (CPS ≥10) as determined by an FDA-approved test.

Enhertu demonstrated clinically meaningful and durable responses in patients across multiple HER2-expressing advanced solid tumours

On June 5, 2023 Astrazeneca reported Positive results from an interim analysis of the ongoing DESTINY-PanTumor02 Phase II trial showed that Enhertu (trastuzumab deruxtecan) demonstrated clinically meaningful and durable responses across a broad range of HER2-expressing advanced solid tumours in previously treated patients (Press release, AstraZeneca, JUN 5, 2023, View Source [SID1234632486]).

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These results will be presented today as a late-breaking oral presentation at the 2023 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting (abstract #LBA3000).

Enhertu is a specifically engineered HER2-directed antibody drug conjugate (ADC) being jointly developed and commercialised by AstraZeneca and Daiichi Sankyo.

In the trial, previously treated patients (2 median prior lines of therapy) with HER2-expressing advanced solid tumours including either biliary tract, bladder, cervical, endometrial, ovarian and pancreatic cancers or other tumours treated with Enhertu showed a confirmed objective response rate (ORR) of 37.1%, as assessed by investigator at an interim analysis. A greater response was observed in patients with the highest level of HER2 expression (immunohistochemistry (IHC) 3+), where Enhertu demonstrated a confirmed ORR of 61.3% as confirmed by central testing. A complete response (CR) was observed in 15 (5.6%) patients in the overall trial population, with 84 (31.5%) partial responses (PR) observed, and 123 (46.1%) patients achieving stable disease. The disease control rate (DCR) in the overall trial population was 68.2%, as assessed by investigator.

Nearly half (49.6%) of all patients in DESTINY-PanTumor02 who achieved a response remained in response at one year. Median duration of response (DoR) was 11.8 months (95% confidence interval [CI] 9.8-NE) in the overall trial population and 22.1 months (CI 9.3-NE) in patients with IHC 3+ expression.

Funda Meric-Bernstam, MD, Chair of the Department of Investigational Cancer Therapeutics at The University of Texas MD Anderson Cancer Center, US and principal investigator for the trial, said: "The DESTINY-PanTumor02 data showed encouraging and durable response rates across a broad range of HER2-expressing solid tumours where there are currently no approved HER2-targeted treatments. Based on these results, Enhertu has the potential to benefit specific patients with HER2-expressing advanced disease who currently have limited options and may face a poor prognosis."

Cristian Massacesi, Chief Medical Officer and Oncology Chief Development Officer, AstraZeneca, said: "While HER2 is an established biomarker in breast, gastric, lung and colorectal cancers, data from the DESTINY-PanTumor02 trial validate HER2 as an actionable biomarker across a broad range of tumour types. Enhertu is the first treatment to demonstrate broad activity across HER2-expressing solid tumours where there are currently no approved HER2-directed therapies. These data will support our ongoing conversations with global health authorities as we look to bring Enhertu to as many patients as possible."

Mark Rutstein, MD, Global Head, Oncology Development, Daiichi Sankyo, said: "Nearly half of patients who achieved a response with Enhertu as a late-line treatment for HER2-expressing advanced solid tumours in DESTINY-PanTumor02 remained in response at one year, demonstrating the potential of this important medicine to provide benefit to patients with hard-to-treat cancers in need of new options. The results further reinforce the important role of antibody drug conjugates like Enhertu to provide potential new solutions to advance current standards of care in areas of high unmet need and improve the outcomes of patients."

Summary of results: DESTINY-PanTumor02

Efficacy Measure

Cervical

Endometrial

Ovarian

BTC

Pancreatic

Bladder

Otheri

All Patients

All IHC Expression Levelsii

(n)

40

40

40

41

25

41

40

267

Confirmed ORR (%)

50.0%

57.5%

45.0%

22.0%

4.0%

39.0%

30.0%

37.1%

Complete response (%)

5.0%

17.5%

10.0%

2.4%

0%

2.4%

0%

5.6%

Partial response (%)

45.0%

40.0%

35.0%

19.5%

4.0%

36.6%

30.0%

31.5%

Stable disease (%)

30.0%

32.5%

35.0%

61.0%

68.0%

43.9%

60.0%

46.1%

Progressive disease (%)

17.5%

10.0%

17.5%

17.1%

28.0%

17.1%

7.5%

15.7%

Not evaluable (%)

2.5%

0%

2.5%

0%

0%

0%

2.5%

1.1%

DCRiii at 12 weeks (%)

67.5%

80.0%

70.0%

65.9%

36.0%

70.7%

75.0%

68.2%

Median DoR (months) (95% CI)

9.8

(4.2-NE)

NR

(9.9-NE)

11.3

(4.1-NE)

8.6

(2.1-NE)

NR

8.7

(4.3-11.8)

NR

(4.1-NE)

11.8

(9.8-NE)

IHC 3+ii

(n)

8

13

11

16

2

16

9

75

Confirmed ORR (%)

75.0%

84.6%

63.6%

56.3%

0.0%

56.3%

44.4%

61.3%

IHC 2+ii

(n)

20

17

19

14

19

20

16

125

Confirmed ORR (%)

40.0%

47.1%

36.8%

0.0%

5.3%

35.0%

18.8%

27.2%

BTC, biliary tract cancer; CI, confidence interval; DCR, disease control rate; DoR, duration of response; IHC, immunohistochemistry; NE, not estimable; NR, not reached; ORR, objective response rate iResponses in extramammary Paget disease, head and neck cancer, oropharyngeal neoplasm, and salivary gland cancer. iiIHC based on central HER2 testing; 67 patients had IHC 1+ (n=25), IHC 0 (n=30) or unknown IHC status (n=12) by central testing iii Confirmed complete response, confirmed partial response or stable disease.

The safety profile of Enhertu was consistent with previous clinical trials, with no new safety concerns identified. The most common Grade 3 or higher treatment-related treatment-emergent adverse events (TEAEs) were neutropenia (19.1%), anaemia (8.6%), fatigue (6.0%) and thrombocytopenia (5.2%).

In DESTINY-PanTumor02, 20 patients (7.5%) experienced interstitial lung disease (ILD) or pneumonitis related to treatment with Enhertu as determined by an independent adjudication committee. The majority (6.7%) were low Grade (Grade 1 or 2) with one (0.4%) Grade 3 event, no Grade 4 events and one (0.4%) Grade 5 event observed.

DESTINY-CRC02 primary results support 5.4mg/kg as optimal dose of Enhertu in patients with HER2-positive metastatic colorectal cancer

Primary results from the DESTINY-CRC02 Phase II trial, which evaluated Enhertu at the 5.4mg/kg and 6.4mg/kg doses in patients with previously treated locally advanced, unresectable or metastatic HER2-positive (IHC 3+ or IHC 2+/in-situ hybridisation [ISH]+) colorectal cancer of BRAF wild-type, RAS wild-type or RAS mutant tumour types, were also presented at ASCO (Free ASCO Whitepaper).

In the primary endpoint analysis, a confirmed ORR of 37.8% (95% CI 27.3-49.2) and 27.5% (95% CI 14.6-43.9) was seen in patients in the 5.4mg/kg and 6.4mg/kg arms respectively, as assessed by blinded independent central review (BICR). All responses (n=42) were partial, with 40 (48.8%) patients in the 5.4mg/kg arm and 23 (57.5%) patients in the 6.4mg/kg arm achieving stable disease. Greater efficacy (46.9% ORR (95% CI 34.3-59.8)) was observed in patients with the highest levels of HER2 expression (IHC 3+) compared to those with IHC 2+/ISH+ HER2 status in the 5.4mg/kg treatment arm (5.6% ORR (95% CI 0.1-27.3)). Anti-tumour efficacy was observed regardless of RAS mutation status (39.7% with RAS mutations; 28.6% without RAS mutations) and in those with prior HER2-directed therapy (41.2%) in the 5.4mg/kg arm.

Enhertu also demonstrated a median DoR of 5.5 months in both the 5.4mg/kg (95% CI 4.2-8.1) and 6.4mg/kg (95% CI 3.7-NE) arms with a median duration of follow-up of 8.9 months and 10.3 months in the two arms respectively. Median progression-free survival (PFS) was 5.8 months (95% CI 4.6-7.0) in the 5.4mg/kg arm and 5.5 months (95% CI 4.2-7.0) in the 6.4mg/kg arm. Median overall survival (OS) was 13.4 months (95% CI 12.5-16.8) in the 5.4mg/kg arm and not reached (95% CI 9.9-NE) in the 6.4mg/kg arm.

The safety profile observed in DESTINY-CRC02 at the 5.4mg/kg and 6.4mg/kg dose levels was consistent with other clinical trials of Enhertu, with no new safety signals identified at either dose. A more favourable benefit-risk profile was observed in patients treated with Enhertu 5.4mg/kg, resulting in its selection as the recommended dose. Grade 3 or higher treatment related TEAEs were numerically higher with Enhertu 6.4mg/kg versus 5.4mg/kg. Grade 3 or higher treatment related TEAEs occurred in 41.0% and 48.7% of patients receiving Enhertu 5.4mg/kg or 6.4mg/kg, respectively.

The most common Grade 3 or higher TEAEs occurring in greater than 10% of patients were neutropenia (16.9% (5.4mg/kg), 28.2% (6.4mg/kg)), anaemia (9.6% (5.4mg/kg), 23.1% (6.4mg/kg)) and thrombocytopenia (6.0% (5.4mg/kg); 12.8% (6.4mg/kg)). There were 12 cases (8.4% in the 5.4mg/kg arm and 12.8% in the 6.4mg/kg arm) of treatment related ILD or pneumonitis reported, as determined by an independent adjudication committee. The majority (5.4mg/kg: 8.4%, 6.4mg/kg: 10.2%) were low Grade (Grade 1 or 2) with no Grade 3, no Grade 4 and one Grade 5 event observed (6.4mg/kg: 2.6%).

Notes

HER2 expression in solid tumours
HER2 is a tyrosine kinase receptor growth-promoting protein expressed on the surface of various tissue cells throughout the body and is involved in normal cell growth.1,2 In some cancers, HER2 expression is amplified or the cells have activating mutations.1,3 HER2 protein overexpression may occur as a result of HER2 gene amplification and is often associated with aggressive disease and poor prognosis.4

While HER2-directed therapies have been used to treat breast, gastric, lung and colorectal cancers, more research is needed evaluating their potential role in treating other HER2-expressing tumour types.2,5,6

HER2 is an emerging biomarker in biliary tract, bladder, cervical, endometrial, ovarian and pancreatic cancers.3 Testing is not routinely performed in these additional tumour types and as a result, available literature is limited. HER2 overexpression (IHC3+) has been observed at rates from 1% to 28% in these solid tumours.7,8 There is an unmet need for effective therapies for certain HER2-expressing solid tumours, particularly for those who have progressed on or are refractory to standard of care therapies as there are currently no approved HER2-directed therapies for these cancers.2,9

Colorectal cancer is the third most common cancer and second most common cause of cancer deaths worldwide, with more than 1.9 million patients diagnosed and more than 935,000 deaths globally in 2020.10 Approximately 25% of patients have metastatic disease at diagnosis, meaning the disease has spread to distant organs and about 50% of patients with colorectal cancer will eventually develop metastases.11 For patients with metastatic disease, approximately 2 to 3% are HER2 overexpressing.6,12

DESTINY-PanTumor02
DESTINY-PanTumor02 is a global, multicentre, multi-cohort, open-label Phase II trial evaluating the efficacy and safety of Enhertu (5.4mg/kg) for the treatment of previously treated HER2-expressing tumours, including biliary tract cancer, bladder cancer, cervical cancer, endometrial cancer, ovarian cancer, pancreatic cancer and other tumours.

The primary efficacy endpoint of DESTINY-PanTumor02 is confirmed ORR as assessed by investigator. Secondary endpoints include DoR, DCR, PFS, OS, safety, tolerability and pharmacokinetics.

DESTINY-PanTumor02 has enrolled 267 patients at multiple sites in Asia, Europe and North America. For more information about the trial, visit ClinicalTrials.gov.

DESTINY-CRC02
DESTINY-CRC02 is a global, randomised, two arm, parallel, multicentre Phase II trial evaluating the efficacy and safety of two doses (5.4mg/kg or 6.4mg/kg) of Enhertu in patients with locally advanced, unresectable or metastatic HER2 positive colorectal cancer of BRAF wild-type, or RAS wild-type and RAS mutant tumour types previously treated with standard therapy.

The trial was conducted in two stages. In the first stage, patients (n=80) were randomised 1:1 to receive either 5.4mg/kg or 6.4mg/kg of Enhertu. In the second stage, additional patients (n=42) were enrolled in the 5.4mg/kg arm.

The primary endpoint is confirmed ORR as assessed by BICR. Secondary endpoints include DoR, DCR, investigator-assessed confirmed ORR, clinical benefit ratio, PFS, OS and safety.

DESTINY-CRC02 enrolled 122 patients at multiple sites in Asia, Europe and North America. For more information about the trial, visit ClinicalTrials.gov.

Enhertu
Enhertu is a HER2-directed ADC. Designed using Daiichi Sankyo’s proprietary DXd ADC technology, Enhertu is the lead ADC in the oncology portfolio of Daiichi Sankyo and the most advanced programme in AstraZeneca’s ADC scientific platform. Enhertu consists of a HER2 monoclonal antibody attached to a topoisomerase I inhibitor payload, an exatecan derivative, via a stable tetrapeptide-based cleavable linker.

Enhertu (5.4mg/kg) is approved in more than 50 countries for the treatment of adult patients with unresectable or metastatic HER2-positive breast cancer who have received a (or one or more) prior anti-HER2-based regimen, either in the metastatic setting or in the neoadjuvant or adjuvant setting, and have developed disease recurrence during or within six months of completing therapy based on the results from the DESTINY-Breast03 trial.

Enhertu (5.4mg/kg) is approved in more than 40 countries for the treatment of adult patients with unresectable or metastatic HER2-low (immunohistochemistry [IHC] 1+ or IHC 2+/in-situ hybridisation [ISH]-) breast cancer who have received a prior systemic therapy in the metastatic setting or developed disease recurrence during or within six months of completing adjuvant chemotherapy based on the results from the DESTINY-Breast04 trial.

Enhertu (5.4mg/kg) is approved in Israel and under accelerated approval in the US for the treatment of adult patients with unresectable or metastatic non-small cell lung cancer whose tumours have activating HER2 (ERBB2) mutations, as detected by an FDA-approved test, and who have received a prior systemic therapy based on the results from the DESTINY-Lung02 trial. Continued approval in the US for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial.

Enhertu (6.4mg/kg) is approved in more than 30 countries for the treatment of adult patients with locally advanced or metastatic HER2-positive gastric or gastroesophageal junction (GEJ) adenocarcinoma who have received a prior trastuzumab-based regimen based on the results from the DESTINY-Gastric01 trial and/or DESTINY-Gastric02 trial.

Enhertu development programme
A comprehensive global development programme is underway evaluating the efficacy and safety of Enhertu monotherapy across multiple HER2-targetable cancers. Trials in combination with other anticancer treatments, such as immunotherapy, are also underway.

Datopotamab deruxtecan combinations showed encouraging tumour responses in patients with advanced non-small cell lung cancer in TROPION-Lung02 Phase Ib trial

On June 5, 2023 Astrazeneca reported Updated results from the TROPION-Lung02 Phase Ib trial showed that, with additional enrolment and follow-up from the initial presentation, datopotamab deruxtecan (Dato-DXd) in combination with pembrolizumab with or without platinum-based chemotherapy demonstrated promising clinical activity and no new safety signals in both previously untreated or pretreated patients with advanced or metastatic non-small cell lung cancer (NSCLC) without actionable genomic alterations (AGAs) (Press release, AstraZeneca, JUN 5, 2023, View Source [SID1234632485]).

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Results will be presented on 6 June in an oral presentation at the 2023 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting (#9004).

Datopotamab deruxtecan is a specifically engineered TROP2-directed DXd antibody drug conjugate (ADC) being jointly developed by AstraZeneca and Daiichi Sankyo.

More than one million people are diagnosed with advanced stage NSCLC each year.1,2 While 1st-line treatment with immune checkpoint inhibitors with or without chemotherapy has improved outcomes for patients with NSCLC without AGAs, like EGFR or ALK, most patients eventually experience disease progression.3-5 TROP2 is a protein expressed in more than 90% of NSCLC tumours; there are currently no TROP2-directed ADCs approved for the treatment of lung cancer.6-8

Across previously untreated and pretreated patients, an objective response rate (ORR) of 38% was observed (95% confidence interval [CI], 26-51) in patients receiving doublet datopotamab deruxtecan plus pembrolizumab (Merck & Co., Inc., Rahway, NJ, USA), an anti-PD-1 therapy. In patients receiving triplet datopotamab deruxtecan plus pembrolizumab and platinum chemotherapy, an ORR of 49% was observed (95% CI, 37-61). Disease control rates (DCR) of 84% and 87% were observed in the doublet and triplet cohorts, respectively. Median duration of response (DoR) was not reached across cohorts. Although immature, median progression-free survival (PFS) was 8.3 months (95% CI, 6.8-11.8) in the doublet cohort and 7.8 months (95% CI, 5.6-11.1) in the triplet cohort. Response rates were highest in previously untreated patients with ORRs of 50% (95% CI, 32-68) and 57% (95% CI, 42-70) observed in the doublet and triplet cohorts, respectively, with a consistent DCR of 91% observed across cohorts.

Yasushi Goto, MD, Division of Internal Medicine and Thoracic Oncology, National Cancer Center Hospital, Tokyo, Japan, and investigator in the trial, said: "Nearly all patients with advanced non-small cell lung cancer experience disease progression following initial therapy, underscoring the need for novel therapeutic approaches across treatment lines. The updated results from TROPION-Lung02 signal the potential for datopotamab deruxtecan combinations to improve outcomes for patients with non-small cell lung cancer and are a promising development in the pursuit of a new standard treatment option beyond immunotherapy."

Cristian Massacesi, Chief Medical Officer and Oncology Chief Development Officer, AstraZeneca, said: "With more patients and nearly a year of additional follow-up, the updated TROPION-Lung02 results show that datopotamab deruxtecan continues to elicit promising and durable responses in a diverse subset of patients with non-small cell lung cancer. These early data give us confidence in the ongoing Phase III development programme evaluating datopotamab deruxtecan combinations as potential first-line treatment options for patients with advanced lung cancer across tumour histologies and PD-L1 expression levels."

Mark Rutstein, MD, Global Head, Oncology Clinical Development, Daiichi Sankyo said: "We continue to be encouraged by the findings from TROPION-Lung02, the first trial to evaluate the combination of a TROP2-directed antibody-drug conjugate and an immune checkpoint inhibitor with or without platinum chemotherapy in patients with advanced non-small cell lung cancer. These data, alongside previous results for datopotamab deruxtecan combined with an immune checkpoint inhibitor, reinforce the potential of these combinations to improve outcomes for patients with different advanced cancers."

The safety profiles of datopotamab deruxtecan-based combinations were consistent with previous data with no new safety signals observed. Grade 3 or greater treatment-related adverse events (TRAEs) occurred in 31% of patients receiving doublet therapy and 58% of patients receiving triplet therapy. The most frequent adverse events of any Grade in the doublet and triplet cohorts, respectively, were stomatitis (56% and 35%), nausea (41% and 47%), anaemia (21% and 48%) and fatigue (31% and 37%). Across treatment cohorts, there were 27 interstitial lung disease (ILD) or pneumonitis events adjudicated as drug-related by an independent committee. The percentage of ILD events was similar across cohorts. The majority of ILD events were low grade with 23 Grade 1 or Grade 2 and four Grade 3 events. No Grade 4 or Grade 5 ILD events or Grade 5 TRAEs were observed.

In the doublet cohort of TROPION-Lung02, 58% of patients were previously untreated and 42% were previously treated with platinum chemotherapy (38%) or immunotherapy (19%). In the triplet cohort, 75% of patients were previously untreated and 25% were previously treated with platinum chemotherapy (24%) or immunotherapy (25%). Eighty percent of patients in the doublet cohort and 73% of patients in the triplet cohort had PD-L1 tumour proportion scores of less than 50%, including 36% and 40% of patients who had PD-L1 tumour proportion scores of less than 1% in the doublet and triplet cohorts, respectively. As of the April 7, 2023 data cut-off, 36% and 46% of patients remained on the doublet and triplet therapy, respectively.

Summary of Results

Overall Population

Doublet (n=64)

Triplet (n=72)

Study Duration (range)

14.8 months (1-30.2)

12.9 months (2.6-23.4)

Efficacy Measure

Doublet (n=61)

Triplet (n=71)

ORR, %i (confirmed and pending) (95% CI)

38% (n=23) (26-51)

49% (n=35) (37-61)

CR, % (confirmed)

0% (n=0)

1% (n=1)

CR, % (pending confirmation)

0% (n=0)

0% (n=0)

PR, % (confirmed)

34% (n=21)

48% (n=34)

PR, % (pending confirmation)

3% (n=2)

0% (n=0)

SD, %

49% (n=30)

38% (n=27)

Median DoR (months) (95% CI)

NR (8.8-NR)

NR (5.8-NR)

Median PFS (months) (95% CI)

8.3 months (6.8-11.8)

7.8 months (5.6-11.1)

DCR, % ii

84% (n=51)

87% (n=62)

1st-Line Therapy

Efficacy Measure

Doublet (n=34)

Triplet (n=53)

ORR, %i (confirmed and pending) (95% CI)

50% (n=17) (32-68)

57% (n=30) (42-70)

CR, % (confirmed)

0% (n=0)

2% (n=1)

CR, % (pending confirmation)

0% (n=0)

0% (n=0)

PR, % (confirmed)

44% (n=15)

55% (n=29)

PR, % (pending confirmation)

6% (n=2)

0% (n=0)

SD, %

47% (n=16)

34% (n=18)

Median DoR (months) (95% CI)

NR (5.5-NR)

NR (5.7-NR)

DCR, %ii

91% (n=31)

91% (n=48)

CI, confidence interval; CR, complete response; DCR, disease control rate; DoR, duration of response; NR, not reached; ORR, objective response rate; PFS, progression-free survival; PR, partial response; SD, stable disease iORR is CR + PR iiDCR is best overall response of confirmed CR + confirmed PR + SD

AstraZeneca and Daiichi Sankyo have three Phase III trials evaluating datopotamab deruxtecan as a potential 1st-line treatment option for patients with advanced or metastatic NSCLC without AGAs compared to the respective standard of care for the patient population of each study:

· TROPION-Lung07 is evaluating datopotamab deruxtecan plus pembrolizumab with or without chemotherapy in patients with non-squamous disease and PD-L1 expression less than 50%.

· TROPION-Lung08 is evaluating datopotamab deruxtecan plus pembrolizumab in patients with PD-L1 expression of 50% or greater.

· AVANZAR is evaluating datopotamab deruxtecan plus Imfinzi (durvalumab) and platinum chemotherapy in patients regardless of PD-L1 expression or tumour histology.

Notes
Non-small cell lung cancer
More than one million people are diagnosed with advanced stage NSCLC each year. 1,2 While targeted therapies and immune checkpoint inhibitors have improved patient outcomes, advanced NSCLC has a poor prognosis and is associated with worsening outcomes after each line of subsequent therapy.3-5

Most patients with NSCLC have tumours that do not express a known AGA (e.g., EGFR, ALK, ROS1, NTRK, BRAF, RET or MET).9-11 The current 1st-line standard of care for these patients is treatment with immune checkpoint inhibitors with or without platinum-based chemotherapy. Approximately 40-60% of tumours will not respond to this initial treatment and while these therapies may improve survival for patients whose tumours do respond, most will experience disease progression.5,7

TROP2, a transmembrane glycoprotein, is expressed in more than 90% of NSCLC tumours.6 There are currently no TROP2-directed ADCs approved for the treatment of lung cancer.7,8

TROPION-Lung02
TROPION-Lung02 is an ongoing global, open-label, six-cohort Phase Ib trial evaluating the safety and efficacy of datopotamab deruxtecan at two dose levels (4 mg/kg and 6 mg/kg) in combination with pembrolizumab (200 mg) with or without four cycles of platinum chemotherapy (carboplatin or cisplatin) in both previously untreated and pretreated patients with advanced or metastatic NSCLC without AGAs (e.g., EGFR, ALK, ROS1, NTRK, BRAF, RET, MET or other known AGAs).

The primary endpoints of TROPION-Lung02 are dose-limiting toxicities and treatment-emergent adverse events. Secondary endpoints include ORR, DoR, PFS as assessed by investigator, overall survival, pharmacokinetics and anti-drug antibodies for datopotamab deruxtecan and pembrolizumab.

TROPION-Lung02 is one of three clinical trials, alongside TROPION-Lung07 and TROPION-Lung08, in a collaboration and supply agreement between Daiichi Sankyo, AstraZeneca and a subsidiary of Merck & Co., Inc., Rahway, NJ., USA to evaluate the combination of datopotamab deruxtecan and pembrolizumab.

Datopotamab deruxtecan (Dato-DXd)
Datopotamab deruxtecan (Dato-DXd) is an investigational TROP2-directed ADC. Designed using Daiichi Sankyo’s proprietary DXd ADC technology, datopotamab deruxtecan is one of the three lead ADCs in the oncology pipeline of Daiichi Sankyo, and one of the most advanced programs in AstraZeneca’s ADC scientific platform. Datopotamab deruxtecan is comprised of a humanized anti-TROP2 IgG1 monoclonal antibody, developed in collaboration with Sapporo Medical University, attached to a number of topoisomerase I inhibitor payloads, an exatecan derivative, via tetrapeptide-based cleavable linkers.

A comprehensive development program called TROPION is underway globally with more than 12 trials evaluating the efficacy and safety of datopotamab deruxtecan across multiple tumours, including NSCLC, triple-negative breast cancer and hormone-receptor positive, HER2-low or negative breast cancer. Beyond the TROPION programme, datopotamab deruxtecan is also being evaluated in novel combinations in several ongoing trials.

Morphogenesis, Inc. and CohBar, Inc. Announce Positive Results from Phase 1b Trial of IFx-Hu2.0, a Novel Personalized Cancer Vaccine, in Checkpoint Inhibitor Resistant Advanced Merkel Cell Carcinoma (MCC) and Cutaneous Squamous Cell Carcinoma (cSCC)

On June 5, 2023 Morphogenesis, Inc. ("Morphogenesis"), a privately-held Phase 2/3 clinical-stage biotechnology company developing novel personalized cancer vaccines and tumor microenvironment modulators to overcome primary and acquired resistance to current immunotherapies, and CohBar, Inc. (NASDAQ: CWBR) ("CohBar"), reported positive initial results from an exploratory analysis of anti-tumor responses to rechallenge with an ICI following protocol directed IFx-Hu2.0 therapy among patients with advanced MCC or cSCC who exhibited primary resistance to ICIs (Press release, Morphogenesis, JUN 5, 2023, View Source [SID1234632484]).

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The abstract titled, "Phase 1b trial of IFx-Hu2.0, a novel personalized cancer vaccine, in checkpoint inhibitor resistant Merkel cell carcinoma and cutaneous squamous cell carcinoma," was presented by Andrew Brohl, MD, H. Lee Moffitt Cancer Center and Research Institute in a poster presentation as part of the Melanoma/Skin Cancers – Advanced/Metastatic Diseases session held at the 2023 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting, taking place June 2-6, 2023 in Chicago, IL.

"While patients with advanced Merkel cell carcinoma and cutaneous Squamous cell carcinoma exhibit high response rates to immune checkpoint inhibitor therapy, the approximately 50% of patients who fail to respond have limited treatment options. We are particularly encouraged by the results in patients with advanced Merkel cell who exhibited primary resistance to ICIs, where 4 of 5 (80%) achieved long lasting, major objective anti-tumor responses on rechallenge with an ICI within the same checkpoint axis," noted Dr. James Bianco, Chief Executive Officer of Morphogenesis. "The potential for IFx-Hu2.0 adjunctive therapy to pembrolizumab in the first line treatment of advanced MCC could overcome primary resistance, allowing higher response rates than pembrolizumab alone."

IFx-Hu2.0 is Morphogenesis’ lead personalized cancer vaccine candidate that is designed to overcome primary resistance to checkpoint inhibitors. In a Phase 1 study in advanced melanoma, biomarker analyses demonstrated robust immune priming effects of IFx administration. The ongoing Phase 1b study evaluates IFx-Hu2.0 in a two-stage study design to assess safety and to examine the effects of repeated weekly dosing up to 3 weeks on the magnitude of the ensuing systemic immune response to determine the optimal dose and schedule for the company’s planned Phase 2/3 registration directed trial.

As reported at ASCO (Free ASCO Whitepaper), following completion of protocol directed therapy, 5 patients with advanced MCC and 2 patients with cSCC who, prior to study entry, failed anti-PD(L)1 therapy were re-treated with anti-PD(L)1 monotherapy: pembrolizumab (3) or avelumab (2) in MCC and cemiplimab (2) in cSCC. Four of 5 (80%) patients with advanced MCC and 1 of 2 (50%) patients with cSCC, or 5 of 7 total (71%), experienced objective anti-tumor responses to ICI rechallenge in this setting, with duration of response ongoing in 4 patients (7+, 8+, 9+, 20+ months) and one response lasting 23 months. All 4 patients with advanced MCC with post-protocol response to anti-PD(L1) therapy had previously experienced progression to this same drug class prior to treatment on protocol.

Based on the positive preliminary results seen to-date, an additional 11 patients are planned for enrollment in the expansion stage of the Phase 1b study using the weekly x 3 dosing schedule. Additional exploratory/biomarker analyses are planned.

For more information about the company’s ongoing Phase 1b IFx-Hu2.0 study, visit Clinicaltrials.gov and reference Identifier NCT04160065.

Morphogenesis and CohBar recently announced that they have entered into a definitive merger agreement for an all-stock transaction to form a company combining expertise and resources to advance a late-stage oncology pipeline. The combined company will focus on advancing Morphogenesis’ two technologies that seek to overcome the major obstacles that limit the effectiveness of current immunotherapies in treating cancer. The combined company is expected to operate under the name "TuHURA Biosciences, Inc." and to trade on The Nasdaq Capital Market ("Nasdaq"). The transaction is expected to close in the third quarter of 2023.

About Immune Fx (IFx) Personalized Cancer Vaccines

IFx-Hu2.0 administration involves a simple injection into the patient’s tumor of a proprietary gene that encodes for an immunogenic bacterial protein which is expressed on the surface of the tumor cell. Recognizing the bacterial protein as being foreign, the patient’s immune system is activated "ingesting" the tumor cell and educating the immune system to all of the patient’s tumor’s neoantigens resulting in the production of tumor specific antibodies and cytotoxic T cells. The presence of activated T cells overcomes resistance to checkpoint inhibitors allowing checkpoint released activated T cells to seek out and destroy the tumor.

Additionally, Morphogenesis is advancing its CD22 targeted, mRNA vaccine (IFx-Hu3.0), toward IND-enabling studies in 2024 for intravenous or autologous whole cell administration for the treatment of B cell malignancies like diffuse large B-cell lymphoma (DLBCL).

NexImmune Presents Initial Positive Data from the NEXI-001 Phase 1 Trial for Relapsed/Refractory Post Allo-HSCT AML at the American Society of Clinical Oncology 2023 Annual Meeting

On June 5, 2023 NexImmune, Inc. (Nasdaq: NEXI), a biotechnology company developing a novel approach to immunotherapy designed to orchestrate a targeted immune response by directing the function of antigen-specific T cells for liquid and solid malignancies, reported results from its Phase 1/2 clinical trial of NEXI-001 in patients with relapsed/refractory acute myeloid leukemia (AML) post-allogeneic hemopoietic stem cell transplant (allo-HSCT) (Press release, NexImmune, JUN 5, 2023, View Source [SID1234632483]). In this clinical trial to date, NEXI-001 is well tolerated with a favorable safety profile while eliciting an immune response to target antigens and a clinical effect in some patients. The data describing two patients from the dose escalation study of NEXI-001 are being presented in a poster session at the American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) 2023 Annual Meeting in Chicago on Monday, June 5 at 8 AM in Hall A.

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"We are pleased that NEXI-001, our donor derived multi-antigen-specific T cell product candidate, is demonstrating evidence of dose response and tolerability in the initial Phase 1 dose escalation portion of this clinical trial," said Kristi Jones, NexImmune’s Chief Executive Officer. "We have seen a clinical response maintained for seven months, which is an additional update from the data reported in our poster. These data have established the ability of our AIM nanoparticles to expand healthy, multi-antigen-specific T cells with anti-tumor activity. The data also show these T cells persist and maintain their memory phenotype at the site of tumor. We expect to provide an additional update on Cohort 3 later this year with more details from the patients in this study, and plan to apply learnings from this trial to inform future trials for NexImmune products in cancer.

"We believe that NexImmune’s multi-antigen-specific product candidates, alone or in combination with other immunotherapies, offer the potential to benefit patients with challenging cancers such as AML, for which treatment options with meaningful benefit and tolerability has remained elusive. The safety profile of our product candidate to date also presents the potential to investigate trials in patients with lower burden disease where significant unmet need remains," added Ms. Jones.

Study Design

The goals of the NEXI-001 Phase 1 clinical trial are to evaluate the safety, tolerability, immune response, and clinical activity of the antigen-specific CD8+ NEXI-001 T cells, as well as to inform the range of patient characteristics and to determine the recommended Phase 2 dose. The dose escalation phase of the study included patients who have relapsed acute myeloid leukemia (AML) post allo-HSCT and are refractory to salvage therapy. All patients in the study, except one, relapsed after, or were refractory to, subsequent salvage therapies (one to three prior therapies). A majority of patients had three-to-four adverse risk characteristics linked to poor prognosis in addition to poor prognostic patients with extramedullary disease.

Three dose-ascending cohorts of patients were enrolled in the study, with potential doses ranging from a single dose of 50 million NEXI-001 T cells to multiple doses of up to a total of 1.2 billion NEXI-001 T cells. To date, the maximum dose evaluated has been 600 million NEXI-001 T cells.

The study includes a lymphodepletion chemotherapy (Flu / Cy 30/300) following a baseline bone marrow biopsy. To date, 11 patients have completed the dose-limiting toxicity (DLT) period and one patient is currently ongoing in the first month of protocol treatment.

"I am very encouraged by the responses and the tolerability profile observed in these difficult-to-treat refractory patients," said Dr. Monzr M. Al Malki, MD, Associate Professor of Hematology, Director of BMT and Transplant, City of Hope and an investigator for NEXI-001. "These patients are frequently fragile and lack effective and tolerable options. Responses for these patients, if any, are typically short-lived and there is an urgent need for better options. As highlighted in the ASCO (Free ASCO Whitepaper) poster, achieving and maintaining a durable clinical response in extramedullary disease is clinically meaningful and supports the potential of NEXI-001 to provide significant benefit to these patients."

Key Data Highlights

Through all dose levels to date, NEXI-001 maintains a favorable tolerability profile with no grade 3 or greater treatment related SAEs. Two patients experienced grade 2 CRS which resolved within 24 hours with tocilizumab therapy. No cases of ICANS have occurred as of May 2023.
Patients treated with NEXI-001 experienced rapid reconstitution of both CD8+ and CD4+ T-cell subtypes after lymphodepletion chemotherapy.
Clinicians observed persistence of antigen-specific T cells in both peripheral blood and bone marrow with evidence of clinical activity including tumor burden reduction, increased chimerism and improved ECOG scores.
The antigen-specific T cells maintain less-differentiated immunophenotypes, including stem-cell-like T cells (Tscm) over time in both blood and bone marrow. Additionally, a marked increase in the antigen specificity of CD8+ T cells in the bone marrow resulted with increasing dose levels.
Six of 11 patients across all dose levels experienced stable disease for some period, including a stable clinical response (MRD+) in one patient and one CR (MRD-) for up to 9 months in cohort 2 (200 million NEXI-001 T cells, administered once), which was reported in the ASCO (Free ASCO Whitepaper) poster. Data continue to support potential dose response with 600 million total cells infused during Cycle 1 being the maximum dose evaluated as of May 2023. Additional cycles or dose increases are anticipated to offer benefit in the designed expansion phase of the study.
One patient in Cohort 3 with a poor prognostic extramedullary relapse of AML manifested by pericardial and bilateral pleural effusions (cytology positive for AML blasts) resulting in symptoms of moderate to severe dyspnea was enrolled in the highest dosing cohort (200 million NEXI-001 T cells administered weekly for three weeks). After one cycle of protocol therapy the patient became asymptomatic and repeat PET/CT scans document that the effusions regressed to minimal volumes. This extramedullary clinical response has been maintained for up to 7 months and is updated from the 3 months described in the ASCO (Free ASCO Whitepaper) poster.
These data indicating both immunologic and clinical dose responses and observed durability in the patient at the higher dose support further clinical study of NEXI-001.
Poster Presentation:

Title: An Analysis of a First-In-Human Study of NEXI-001 Donor-Derived Antigen-Specific CD8+ T-Cell Treatment of Relapsed AML after Allogeneic Hematopoietic Cell Transplantation (HCT)

Abstract #: 7043 (Poster Board #173)

Session Title: Hematologic Malignancies – Leukemia, Myelodysplastic Syndromes, and Allotransplant

Authors: Monzr M. Al Malki, MD1, Juan C. Varela MD, PhD2, Sumithira Vasu, MBBS3, Dipenkumar Modi, MD4, Suzanne Afonso-Smith, PhD5, Sojung Kim, PhD5, Emily Lu, PhD5, Robert D. Knight, MD5, and Mathias Oelke, PhD5

(1)Hematology/Hematopoietic Cell Transplant, City of Hope National Medical Center, Duarte, CA, (2)Advent Health Blood and Marrow Transplant Program, Orlando, FL, (3)Division of Hematology, Department of Internal Medicine, The Ohio State University, Columbus Ohio, (4)Division of Oncology, Karmanos Cancer Center/Wayne State University, Detroit, MI, (5)NexImmune, Inc., Gaithersburg, MD