Adicet Bio Announces FDA Clearance of IND Application for ADI-270 in Renal Cell Carcinoma

On June 24, 2024 Adicet Bio, Inc. (Nasdaq: ACET), a clinical stage biotechnology company discovering and developing allogeneic gamma delta T cell therapies for autoimmune diseases and cancer, reported that the U.S. Food and Drug Administration (FDA) has cleared the Company’s Investigational New Drug (IND) application to evaluate ADI-270, an armored allogeneic "off-the-shelf" gamma delta chimeric antigen receptor (CAR) T cell therapy candidate targeting CD70+ cancers, for the treatment of relapsed/refractory renal cell carcinoma (RCC) (Press release, Adicet Bio, JUN 24, 2024, View Source [SID1234644522]). The Company plans to initiate a Phase 1 clinical trial to assess the safety and anti-tumor activity of ADI-270 in RCC patients in the second half of 2024.

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"ADI-270 is the first ever gamma delta 1 CAR T cell therapy candidate to enter clinical trials for the treatment of solid tumors," said Chen Schor, President and Chief Executive Officer of Adicet Bio. "The FDA’s clearance of our IND application to evaluate ADI-270 in patients with RCC underscores a significant achievement for Adicet. ADI-270 is a third-generation CAR T designed to target CD70+ tumors with high specificity, increased exposure, persistence and tumor infiltration, while addressing immunosuppressive factors in the tumor microenvironment. RCC is the most common type of kidney cancer and has a high unmet need with limited viable treatment options available. With its highly differentiated profile, we believe that ADI-270 has the potential to become an important therapeutic option for patients with RCC and other CD70+ tumors."

The Phase 1 multicenter, open-label clinical trial is designed to investigate ADI-270 as monotherapy in adults with relapsed or refractory clear cell RCC. Following lymphodepletion, patients will be eligible to receive a single dose of ADI-270 with a starting dose level of 3E8 CAR+ cells. Subject to meeting protocol defined criteria, patients enrolled in the study may be eligible to receive a second dose of ADI-270.

The dose escalation and dose expansion portions of the trial will evaluate safety, tolerability, and pharmacokinetics as well as anti-tumor activity as assessed by overall response rate, duration of response and disease control rate.

About ADI-270

ADI-270 is an armored allogeneic "off-the-shelf" gamma delta CAR T cell therapy candidate targeting CD70-positive cancers. CD70 is a compelling target due to its high expression in both solid and hematological malignancies. ADI-270 is engineered with a third-generation CAR design to target CD70 using its natural receptor, CD27, as the binding moiety and is further armored with a dominant negative form of the Transforming growth factor-β receptor II (dnTGFβRII) designed to provide functional resilience to the immunosuppressive tumor microenvironment. ADI-270 is also designed to increase exposure and persistence by reducing susceptibility to host vs. graft elimination. These properties of ADI-270 combined with the potent tumor infiltration demonstrated with gamma delta 1 T cells aim to improve clinical responses of RCC patients and other patients with CD70+ tumors.

About Renal Cell Carcinoma

Renal cell carcinoma (RCC) is the most common tumor of the kidney, constituting 80% to 85% of primary renal neoplasms. Clear cell RCCs (ccRCC) are the most common subtype, accounting for 80% of all RCCs. ccRCC is an aggressive subtype arising from renal stem cells commonly arising in the proximal nephron and tubular epithelium, and often metastasizes to the lungs, liver, and bones. Approximately 20% of newly diagnosed cases of RCC are locally advanced or metastatic and up to 30% of patients will develop metastatic disease following nephrectomy. While the 5-year survival rate for localized RCC is 93%, the 5-year survival rate for advanced disease is 15%.

An innovative drug Gumarontinib (MET inhibitor) discovered and developed by Haihe Biopharma has been successfully approved in Japan

On June 24, 2024 Haihe Biopharma Co., Ltd. (referred as "Haihe") reported that Ministry of Health, Labor and Welfare of Japan approved New Drug Application ("NDA") of Gumarontinib (SCC244) for the treatment of unresectable advanced or recurrent non-small cell lung cancer (NSCLC) with MET exon 14 (METex14) skipping mutation (Press release, Shanghai HaiHe Pharmaceutical, JUN 24, 2024, View Source [SID1234646873]).

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The indication application is based on the data from the successful SCC244-108 (GLORY study, NCT04270591), a pivotal Phase II study, to evaluate the efficacy and safety of Gumarontinib in locally advanced or metastatic NSCLC patients with METex14 skipping mutations. This indication has been approved by NMPA in China on March 7, 2023. The global leading principal investigator is Prof. Shun Lu of Shanghai Chest Hospital, China.

A total of 79 patients with MET exon 14 skipping mutations confirmed by the central laboratory were enrolled in the GLORY study with a data cut-off date of April 28, 2022. The confirmed overall objective response rate (ORR) per Blinded Independent Review Committee (IRC) was 65.8%, including 70.5% ORR for treatment-naïve patients and 60.0% ORR for previously-treated patients at 12-months follow-up. The median progression-free survival (PFS) was 8.5 months, 11.7 months and 7.6 months for overall population, treatment-naïve and previously treated patients respectively. Additionally, the median overall survival (OS) was 17.3 months and 16.2 months for overall population and previously-treated patients respectively, and it has not reached in treatment-naïve patients to the date of this report.

Dr. Ruiping Dong, Chief Executive Officer of Haihe, stated,
"The approval of Gumarontinib in Japan is another significant milestone for the company, highlighting the company’s commitment to developing and providing innovative oncology therapies to meet the unmet medical needs of patients in China and around the world. Following the international strategy of "From China to the World",the company will continue to bring innovative and high-quality drugs to patients worldwide. Also,we would like to express our gratitude to all researchers, patients, family members of patients, and clinical staffs who have worked hard on the clinical research of Gumarontinib!"
Prof. Shun Lu, the global leading principal investigator of the GLORY study, from the Oncology Department of Shanghai Chest Hospital, commented,
"The approval of Gumarontinib in Japan will provide a new treatment option for the Japanese NSCLC patients. It also confirms that the GLORY study of Gumarontinib, led by Chinese and Japanese researchers, has gained international recognition and affirmation. It is a new milestone in the journey of China’s bio-innovative drugs onto the global stage. We look forward to seeing more innovative drugs from China, such as Gumarontinib, go global to meet the unmet medical needs of patients."
About NSCLC and METex14 Skipping Mutations
Primary lung cancer is the second most common malignant cancer and the first in terms of mortality in the world. NSCLC accounts for approximately 85% of all lung cancers1. The total incidence of METex14 skipping mutations in NSCLC is about 3%2, and the incidence in Chinese NSCLC population is about 2.51%3. METex14 skipping mutations is a primary oncogenic driver gene, which usually does not coexist with other lung cancer mutations such as EGFR, KRAS and ALK2. Most patients were elderly, with a median age of 72 years2. METex14 skipping mutations predicted poor prognosis, with progression-free survival (PFS) of only 2.9 months, overall survival (OS) of 7.9 – 8.3 months, and objective response rate (ORR) of 8.8% – 9.1% in second-line chemotherapy4. NSCLC patients with METex14 skipping mutations were insensitive to PD-1 therapy with ORR ranged from 16 to 17%, median PFS ranged from 1.9 to 3.4 months, and there was no increase in response rate among tumor patients with high PD-L1 expression5-6. In Japan, the number of new lung cancer patients is 120,000/year (2020) and the number of deaths is 70,000 /year 7. The proportion of non-small cell lung cancer among lung cancer patients in Japan is 88%, and the frequency of METex 14 skipping mutation-positive expression is about 3%2. Therefore, in Japan, the estimated number of patients who may need to receive this type of drug treatment is around 1,800 per year.

About Gumarontinib (SCC244)
Gumarontinib (code: SCC244) is an oral, potent and highly selective small molecule MET inhibitor. Gumarontinib has shown excellent pharmacokinetic characteristics, highly effective and durable efficacy and favorable safety profile in NSCLC patients with MET alterations. Gumarontinib has long half-life to achieve sustained target inhibition, low DDI potential to enable less co-medication restrictions, convenient QD regimen. Gumarontinib has been approved by the NMPA in China with breakthrough designation for the treatment of non-small cell lung cancer (NSCLC) with MET genomic aberration. A few clinical trials are ongoing, such as one phase III clinical trial for patients with non-small cell lung cancer (NSCLC) who have MET overexpression and are negative for driver mutations (this indication has been granted breakthrough therapy designation by the CDE).

Takeda Receives Approval from European Commission for FRUZAQLA in Previously Treated Metastatic Colorectal Cancer

On June 21, 2024 Takeda (TSE:4502/NYSE:TAK) reported that the European Commission (EC) approved FRUZAQLA (fruquintinib) as a monotherapy indicated for the treatment of adult patients with metastatic colorectal cancer (mCRC) who have been previously treated with available standard therapies, including fluoropyrimidine-, oxaliplatin-, and irinotecan-based chemotherapies, anti-VEGF agents, and anti-EGFR agents, and who have progressed on or are intolerant to treatment with either trifluridine-tipiracil or regorafenib (Press release, Takeda, JUN 21, 2024, View Source [SID1234644489]). The decision follows a positive opinion from the Committee for Medicinal Products for Human Use (CHMP) on April 25, 2024, and approval by the U.S. Food and Drug Administration (FDA) for adults with mCRC who have been previously treated with oxaliplatin- and irinotecan-based regimens on November 8, 2023.1,2

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"People living with metastatic colorectal cancer face numerous difficulties, stemming both from their illness and the adverse effects of therapies. Given the complex nature of the disease, introducing innovative treatments such as fruquintinib – an oral, chemotherapy-free targeted agent – is essential. I am looking forward to having a new choice for appropriate patients," said Josep Tabernero, MD, PhD, director of Vall d´Hebron Institute of Oncology (VHIO).

The approval is based on results from the Phase 3 multi-regional FRESCO-2 trial. The trial investigated FRUZAQLA plus best supportive care (BSC) versus placebo plus BSC in patients with previously treated mCRC. FRESCO-2 met all its primary and key secondary efficacy endpoints and showed consistent benefit among patients treated with FRUZAQLA, regardless of the prior types of therapies they received. FRUZAQLA demonstrated a manageable safety profile in FRESCO-2. Adverse reactions leading to treatment discontinuation occurred in 20% of patients treated with FRUZAQLA plus BSC versus 21% of those treated with placebo plus BSC. Data from FRESCO-2 were published in The Lancet in June 2023.3

"Today’s approval marks an important moment for the colorectal cancer community in the EU. For the first time in over a decade, patients with previously treated metastatic colorectal cancer have a new targeted treatment option that can be used irrespective of whether their tumors harbor actionable mutations," said Teresa Bitetti, president of the Global Oncology Business Unit at Takeda. "We look forward to offering patients a novel treatment option that has a manageable safety profile and can be effective regardless of the prior types of therapies they have received."

About FRUZAQLA (fruquintinib)

FRUZAQLA is a selective oral inhibitor of all three VEGF receptors (-1, -2 and -3). VEGFR inhibitors play a pivotal role in blocking tumor angiogenesis. FRUZAQLA was designed to have enhanced selectivity that limits off-target kinase activity, allowing for high drug exposure, sustained target inhibition, and flexibility for potential use as part of combination therapy.

Takeda has the exclusive worldwide license to further develop, commercialize, and manufacture fruquintinib outside of mainland China, Hong Kong and Macau. FRUZAQLA was approved by the U.S. Food and Drug Administration (FDA) in November 2023. A submission to the Japan Pharmaceuticals and Medical Devices Agency (PMDA) took place in September 2023. Fruquintinib is developed and marketed in China by HUTCHMED. Fruquintinib was approved for marketing by the China National Medical Products Administration (NMPA) in September 2018 and commercially launched in China in November 2018 under the brand name ELUNATE.

EUROPEAN UNION IMPORTANT SAFETY INFORMATION

Please consult the FRUZAQLA (fruquintinib) Summary of Product Characteristics (SmPC) before prescribing.

Guidance for use: FRUZAQLA should be initiated by a physician experienced in the administration of anticancer therapy. Patients should be given the package leaflet.

CONTRAINDICATIONS: Hypersensitivity to the active substance or to any of the excipients.

SPECIAL POPULATIONS: Renal impairment: No dose adjustment is required for patients with mild, moderate, or severe renal impairment; Hepatic impairment: No dose adjustment is required for patients with mild or moderate hepatic impairment. FRUZAQLA is not recommended for use in patients with severe hepatic impairment as FRUZAQLA has not been studied in this population; Elderly: No dose adjustment is required in patients aged 65 years or above; Paediatric population: There is no relevant use of FRUZAQLA in the paediatric population for the indication of metastatic colorectal cancer; Women of childbearing potential/Contraception in females: Women of childbearing potential should be advised to use highly effective contraception during treatment and for at least 2 weeks following the last dose of FRUZAQLA; Pregnancy: There are no clinical data available on the use of FRUZAQLA in pregnant women. Based on its mechanism of action, FRUZAQLA has the potential to cause foetal harm. Animal studies have shown reproductive toxicity, including foetal malformations. FRUZAQLA should not be used during pregnancy unless the clinical condition of the woman requires treatment with FRUZAQLA. If FRUZAQLA is used during pregnancy or if the patient becomes pregnant while on treatment, the patient must be informed of the potential hazard to the foetus; Breast-feeding: The safe use of FRUZAQLA during breast-feeding has not been established. It is not known whether FRUZAQLA or its metabolites are excreted in human milk. There are no animal data on the excretion of FRUZAQLA in animal milk. A risk to the breastfeeding newborns/infants cannot be excluded. Breastfeeding should be discontinued during treatment and for 2 weeks after the last dose; Fertility: There are no data on the effects of FRUZAQLA on human fertility. Results from animal studies indicate that FRUZAQLA may impair male and female fertility.

SPECIAL WARNINGS AND PRECAUTIONS FOR USE

Hypertension: Hypertension, including hypertensive crisis, has been reported in patients treated with FRUZAQLA. Pre-existing hypertension should be monitored and adequately controlled in accordance with standard medical practices before starting FRUZAQLA treatment.

Hypertension should be medically managed with antihypertensive medicinal products and adjustment of the FRUZAQLA dose, if necessary. FRUZAQLA should be permanently discontinued for hypertension that cannot be controlled with antihypertensive therapy or in patients with hypertensive crisis.
Haemorrhagic events: Haemorrhagic events have been reported in patients treated with FRUZAQLA, including gastrointestinal (GI) tract events. Serious and sometimes fatal bleeding events have been reported in patients after treatment with FRUZAQLA.

Haematologic and coagulation profiles should be monitored in accordance with standard medical practices in patients at risk for bleeding, including those treated with anticoagulants or other concomitant medicinal products that increase the risk of bleeding. In the event of severe bleeding requiring immediate medical intervention, FRUZAQLA should be permanently discontinued.
Gastrointestinal perforation: GI perforation events, including fatal events, have been reported in patients treated with FRUZAQLA.

Symptoms of GI perforation should be periodically monitored during treatment with FRUZAQLA.

FRUZAQLA should be permanently discontinued in patients developing GI perforation.
Proteinuria: Proteinuria events have occurred in patients treated with FRUZAQLA.

Proteinuria should be monitored before initiation and during treatment with FRUZAQLA in accordance with standard medical practices. If urine dipstick proteinuria ≥ 2 g / 24 hours is detected, dose interruptions, adjustments, or discontinuation may be necessary. FRUZAQLA should be permanently discontinued in patients developing nephrotic syndrome.
Palmar-plantar erythrodysaesthesia syndrome (PPES): PPES is the most frequently reported dermatological adverse reaction.

If Grade ≥ 2 skin reactions are detected, dose interruptions, adjustments, or discontinuation may be necessary.
Posterior reversible encephalopathy syndrome (PRES): PRES has been reported in 1 patient (0.1%) treated with FRUZAQLA in clinical studies. PRES is a rare neurologic disorder that can present with headache, seizure, lethargy, confusion, altered mental function, blindness, and other visual or neurological disturbances, with or without associated hypertension. A diagnosis of PRES requires confirmation by brain imaging, preferably magnetic resonance imaging (MRI). In patients developing PRES, discontinuation of FRUZAQLA, along with control of hypertension and supportive medical management of other symptoms, are recommended.
Impaired wound healing: Impaired wound healing has been reported in 1 patient (0.1%) treated with FRUZAQLA in clinical studies.

Patients are recommended to withhold FRUZAQLA for at least 2 weeks prior to surgery. FRUZAQLA should not be resumed for at least 2 weeks after surgery, as clinically indicated when there is evidence of adequate wound healing.
Arterial and venous thromboembolic events: It is recommended to avoid starting treatment with FRUZAQLA in patients with a history of thromboembolic events (including deep vein thrombosis and pulmonary embolism) within the past 6 months or if they have a history of stroke and/or transient ischemic attack within the last 12 months. If arterial thrombosis is suspected, FRUZAQLA should be discontinued immediately.
INTERACTIONS

Effects of other medicinal products on the pharmacokinetics of FRUZAQLA

CYP3A inducers

Co-administration of FRUZAQLA with rifampicin (a strong CYP3A inducer) 600 mg once daily decreased FRUZAQLA AUCinf by 65% and decreased Cmax by 12%. The concomitant use of FRUZAQLA with strong and moderate CYP3A inducers should be avoided.

CYP3A inhibitors

Co-administration of FRUZAQLA with itraconazole (a strong CYP3A inhibitor) 200 mg twice daily did not result in clinically meaningful changes in the area under the concentration-time curve (AUC) and Cmax of FRUZAQLA. No dose adjustment of FRUZAQLA is needed during concomitant use with CYP3A inhibitors.

Gastric acid lowering agents

Co-administration of FRUZAQLA with rabeprazole (a proton pump inhibitor) 40 mg once daily did not result in clinically meaningful changes in the AUC of FRUZAQLA. No dose adjustment of FRUZAQLA is needed during concomitant use with gastric acid lowering agents.

Effect of FRUZAQLA on the pharmacokinetics of other medicinal products

Medicinal products that are substrates of P-glycoprotein (P-gp)

Co-administration of a single dose of dabigatran etexilate 150 mg (a P-gp substrate) with a single dose of FRUZAQLA 5 mg decreased AUC of dabigatran by 9%. No dose adjustment is recommended for P-gp substrates during concomitant use with FRUZAQLA.

Medicinal products that are substrates of breast cancer resistance protein (BCRP)

Co-administration of a single 10 mg dose of rosuvastatin (a BCRP substrate) with a single 5 mg dose of FRUZAQLA decreased AUC of rosuvastatin by 19%. No dose adjustment is recommended for BCRP substrates during concomitant use with FRUZAQLA.

UNDESIRABLE EFFECTS: The most commonly reported adverse reactions with FRUZAQLA are:

Very common

(frequency ≥1/10)

Thrombocytopenia, hypothyroidism, anorexia, hypertension, dysphonia, diarrhoea, stomatitis, aspartate aminotransferase increased, total bilirubin increased, alanine aminotransferase increased, palmar-plantar erythrodysaesthesia syndrome, musculoskeletal discomfort, arthralgia, proteinuria, asthenia, and fatigue

Common

(≥1/100 to <1/10)

Pneumonia, upper respiratory tract infection, bacterial infections, leukopenia, neutropenia, hypokalemia, epistaxis, throat pain, gastrointestinal haemorrhage, gastrointestinal perforation, pancreatic enzymes increased, oral pain, rash, and mucosal inflammation

About CRC

CRC is a cancer that starts in either the colon or rectum. According to the International Agency for Research on Cancer, CRC is the third most prevalent cancer worldwide and was associated with more than 1.9 million new cases and 900,000 deaths in 2022. In Europe, CRC was the second most common cancer in 2022, with approximately 538,000 new cases and 248,000 deaths.4 In the U.S., it is estimated that 153,000 patients will be diagnosed with CRC and 53,000 deaths from the disease will occur in 2024.5 In Japan, CRC was the most common cancer in 2022, with more than 145,000 new cases and 60,000 deaths.4 Although early-stage CRC can be surgically resected, metastatic CRC remains an area of high unmet need with poor outcomes and limited treatment options. Some patients with metastatic CRC may benefit from personalized therapeutic strategies based on molecular characteristics; however, most patients have tumors that do not harbor actionable mutations.6,7,8,9,10

About the Phase 3 FRESCO-2 Trial

The FRESCO-2 study is a multi-regional clinical trial conducted in the U.S., Europe, Japan and Australia investigating FRUZAQLA plus BSC vs placebo plus BSC in patients with previously treated mCRC (NCT04322539). The study met all of its primary and key secondary endpoints, demonstrating that treatment with FRUZAQLA resulted in statistically significant and clinically meaningful improvement in OS and PFS. The safety profile of FRUZAQLA in FRESCO-2 was consistent with previously reported fruquintinib monotherapy studies. Results from the study were presented at ESMO (Free ESMO Whitepaper) in September 2022 and subsequently published in The Lancet in June 2023.

European Medicines Agency Validates Bristol Myers Squibb’s Application for Subcutaneous Nivolumab

On June 21, 2024 Bristol Myers Squibb (NYSE: BMY) reported that the European Medicines Agency (EMA) has validated the extension application to introduce a new route of administration (subcutaneous use) for Opdivo (nivolumab) that includes a new pharmaceutical form (solution for injection) and a new strength (600 mg/vial) across multiple previously approved adult solid tumor indications as monotherapy, monotherapy maintenance following completion of nivolumab plus ipilimumab combination therapy, or in combination with chemotherapy or cabozantinib, based on the results from the Phase 3 CheckMate -67T study (Press release, Bristol-Myers Squibb, JUN 21, 2024, View Source [SID1234644490]). Validation of the application confirms the submission is complete and begins the EMA’s centralized review procedure.

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"Subcutaneous nivolumab has the potential to change the way patients living with cancer receive Opdivo treatment and to significantly reduce administration time by utilizing a single injection in three-to-five minutes. By providing patients the same quality of care as IV Opdivo in a fraction of the time, patients can focus on what is important to them rather than spending a longer wait time at the infusion center," said Susan Parker, vice president, global program lead, product design & development, Bristol Myers Squibb. "We are committed to advancing medicines that improve the patient experience and are evaluating innovative formulations across our broad portfolio. We look forward to working with the EMA to advance this application with the goal of introducing the subcutaneous option of Opdivo."

In the Phase 3 CheckMate -67T trial, subcutaneous nivolumab demonstrated noninferiority of Cavgd28 (time-averaged Opdivo serum concentration over 28 days) and Cminss (trough serum concentration at steady state), the study’s primary endpoints, vs. intravenous (IV) Opdivo in patients with advanced or metastatic clear cell renal cell carcinoma (ccRCC) who have received no more than two prior lines of systemic therapy. Additionally, subcutaneous nivolumab showed noninferiority of the key secondary endpoint of objective response rate (ORR) as assessed by Blinded Independent Central Review (BICR) vs. IV Opdivo. The safety profile of subcutaneous nivolumab was consistent with the IV formulation. The pharmacokinetics, efficacy and safety results from CheckMate -67T were presented at the 2024 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Genitourinary Cancers Symposium. Additional safety analyses and patient reported outcomes were recently presented at the 2024 ASCO (Free ASCO Whitepaper) Annual Meeting.

About CheckMate -67T
CheckMate -67T is a Phase 3 randomized, open-label trial evaluating subcutaneous administration of Opdivo co-formulated with Halozyme’s proprietary recombinant human hyaluronidase, rHuPH20, or subcutaneous nivolumab (nivolumab and hyaluronidase) compared to intravenous Opdivo, in patients with advanced or metastatic ccRCC who have received prior systemic therapy. This trial presents an opportunity to potentially bring a subcutaneous formulation of Opdivo to patients. A total of 495 patients were randomized to either subcutaneous nivolumab or intravenous Opdivo. The co-primary endpoints of the trial are time-averaged serum concentration over 28 days (Cavgd28) and trough serum concentration at steady-state (Cminss) of subcutaneous nivolumab vs. intravenous Opdivo. Objective response rate (ORR) is a key secondary endpoint.

Arvinas Announces Presentations for Two of its PROTAC® Investigational Programs Targeting BCL6 and LRRK2

On June 21, 2024 Arvinas, Inc. (Nasdaq: ARVN), a clinical-stage biotechnology company creating a new class of drugs based on targeted protein degradation, reported it presented new preclinical data from its investigational BCL6 PROTAC degrader ARV-393 at the European Hematology Association (EHA) (Free EHA Whitepaper) 2024 Annual Congress that took place June 13-16, 2024 in Madrid, Spain, and presented new preclinical data from its PROTAC LRRK2 degrader program at the Biennial International LRRK2 Meeting that took place June 18-21, 2024 in Crete, Greece (Press release, Arvinas, JUN 21, 2024, View Source [SID1234644478]).

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Data presented at EHA (Free EHA Whitepaper) showed anti-tumor activity for the company’s investigational PROTAC BCL6 degrader, ARV-393, in preclinical models of B-cell lymphoma. In these preclinical models, ARV-393 potently and rapidly degraded the BCL6 protein and inhibited cell growth in diffuse large B-cell lymphoma (DLBCL) and Burkitt cell lines. ARV-393 showed tumor growth inhibition, including tumor regression, in various DLBCL cell line-derived xenograft (CDX) models and in multiple patient-derived xenograft (PDX) models of non-Hodgkin lymphoma (NHL), including germinal center B-cell-like (GCB), activated B-cell (ABC), GCB/ABC, BCL not otherwise specified (BCL/NOS) subtypes of DLBCL, and Burkitt lymphoma.

"These new preclinical data for ARV-393 demonstrate that in these models it can effectively target and induce the degradation of the BCL6 protein that is commonly deregulated in DLBCL," said John Houston, Ph.D., Chairperson, President, and Chief Executive Officer at Arvinas. "These encouraging results suggest that ARV-393 could be developed into a potential new treatment for patients with certain types of non-Hodgkin lymphoma, particularly those who have not responded to other treatments."

Preclinical data presented at the Biennial LRRK2 Meeting highlighted the potential of the company’s oral PROTAC LRRK2 degraders to treat neurodegenerative diseases. Preclinical studies in mice demonstrated full target engagement of LRRK2 kinase inhibitor and near-complete LRRK2 degradation with PROTAC LRRK2 degraders, but substantially less Type II pneumocyte enlargement compared to an experimental LRRK2 kinase inhibitor. In addition, the more noticeable Type II pneumocyte enlargement phenotype observed with the experimental LRRK2 kinase inhibitor was substantiated by the accumulation of surfactant protein C in lung, which was not observed after treatment with a PROTAC LRRK2 degrader.

"Nonclinical findings presented this week suggest the potential for a wide therapeutic index and manageable safety profile for PROTAC degraders versus experimental LRRK2 kinase inhibitors," said Angela Cacace, Ph.D., Chief Scientific Officer at Arvinas. "In earlier preclinical studies, Arvinas’ PROTAC LRRK2 degraders have been shown to cross the blood-brain barrier and degrade LRRK2, a large multidomain scaffolding kinase, in deep brain regions."

Arvinas’ oral PROTAC BCL6 degrader ARV-393 is currently in a phase 1 clinical trial in patients with NHL, and Arvinas also has an oral PROTAC LRRK2 degrader, ARV-102, currently being investigated in a phase 1 clinical trial in healthy volunteers.

About ARV-393

ARV-393 is an investigational PROTAC designed to degrade B-cell lymphoma 6 protein (BCL6), a transcriptional repressor and major driver of B-cell lymphomas. The BCL6 protein facilitates B cell tolerance of rapid proliferation and somatic gene recombination via repressing cell cycle checkpoints, terminal differentiation, apoptosis, and the DNA damage response. PROTAC-mediated degradation has the potential to address the traditional undruggable nature of BCL6. ARV-393 is currently in a phase 1 clinical trial in patients with non-Hodgkin lymphoma.

About ARV-102

ARV-102 is an investigational PROTAC designed to degrade Leucine-rich repeat kinase 2 (LRRK2) which is a large multidomain scaffolding kinase. Human genetics, increased activity and expressions of LRRK2 is genetically involved in the pathogenesis of neurological diseases including Parkinson’s Disease and progressive supranuclear palsy. Arvinas is developing oral, blood-brain-barrier penetrant PROTAC degraders of LRRK2.