On October 13, 2025 Eli Lilly and Company (NYSE: LLY) reported that new data from across its oncology portfolio and pipeline will be presented at the European Society for Medical Oncology (ESMO) (Free ESMO Whitepaper) Annual Meeting, taking place October 17-21 in Berlin, Germany (Press release, Eli Lilly, OCT 13, 2025, View Source [SID1234656581]). These presentations highlight the breadth of Lilly’s portfolio across treatment modalities and tumor types.
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Presentation Highlights
Verzenio (abemaciclib; CDK4/6 inhibitor):
In a late-breaking oral presentation, Lilly will share results from the landmark seven-year analysis of monarchE, including primary overall survival analysis and updated invasive disease-free survival and distant relapse-free survival, in patients with hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2-), node-positive, high-risk early breast cancer. Additionally, in a mini-oral presentation, Lilly will share an in-depth analysis from monarchE examining the prognostic and predictive value of the Ki-67 index, pre- and post-neoadjuvant chemotherapy.
Olomorasib (investigational KRAS G12C inhibitor):
In a mini oral presentation, Lilly will share results from the Phase 1/2 study on the intracranial efficacy of olomorasib, a next-generation KRAS G12C inhibitor, in patients with KRAS G12C-mutant non-small cell lung cancer (NSCLC) who have active, untreated brain metastases.
LY4064809 (investigational pan-mutant-selective PI3Ka inhibitor):
In a late-breaking oral presentation, Lilly will share updated results from the Phase 1/2 PIKALO-1 trial, a study of LY4064809 (STX-478), a pan-mutant-selective PI3Ka inhibitor, in PIK3CA-mutant advanced breast cancer and other solid tumors.
Vepugratinib (investigational FGFR3 inhibitor):
In a mini oral presentation, Lilly will share updated results from the FORAGER-1 study, a first-in-human Phase 1 study of vepugratinib (LY3866288), a potent, highly isoform-selective FGFR3 inhibitor, in FGFR3-altered urothelial cancer.
LY4170156 (investigational ADC targeting FRα):
In a poster presentation, Lilly will share updated safety and efficacy results from the Phase 1a/1b study of LY4170156 in patients with platinum-resistant ovarian cancer.
"At ESMO (Free ESMO Whitepaper) 2025, we’re proud to showcase new clinical data from several studies that underscore Lilly’s commitment to advancing cancer care, including the primary overall survival analysis for Verzenio in the Phase 3 monarchE trial, as well as updated safety and efficacy data from our FRα ADC, PI3Kα and FGFR3 programs, all of which are poised to advance to late stage studies over the next several months," said Jacob Van Naarden, executive vice president and president of Lilly Oncology. "These data reflect the meaningful progress we have made in strengthening our oncology portfolio and our dedication to improving outcomes for people living with cancer."
A full list of abstract titles and viewing details are listed below:
Abstract Title
Author
Presentation Type/#
Session Title
Session
Date/Time
(CEST)
Verzenio (abemaciclib; CDK4/6 inhibitor)
monarchE: Primary overall
survival results of adjuvant
abemaciclib plus endocrine
therapy for high-risk, HR+,
HER2-, early breast cancer
Stephen Johnston
Oral
Abstract #LBA13
Proffered Paper session:
Breast cancer, early stage
Friday, October 17
2:00-3:30 p.m. CEST
monarchE: Evaluation of
prognostic and predictive
value of Ki-67 index pre and
post neoadjuvant
chemotherapy (NAC) and
changes following NAC
Miguel Martin
Mini Oral
Abstract #295MO
Mini oral session: Breast
cancer, early stage
Sunday, October 19
10:15-11:45 a.m. CEST
Olomorasib (investigational KRAS G12C inhibitor)
Intracranial efficacy of
olomorasib, a second-
generation KRAS G12C
inhibitor, in patients with KRAS
G12C-mutant NSCLC who have
active, untreated brain
metastases
Philippe Cassier
Mini Oral
Abstract #1846MO
Mini oral session 1: NSCLC
metastatic
Sunday, October 19
8:30-10:00 a.m. CEST
LY4064809 (investigational pan-mutant-selective PI3Ka inhibitor)
A phase 1/2 trial of LY4064809
(STX-478), a pan-mutant-
selective PI3Ka inhibitor in
PIK3CA-mutant advanced
breast cancer (ABC) and other
solid tumors: Updated results
from the PIKALO-1 study
Dejan Juric
Mini Oral
Abstract #LBA26
Mini oral session: Breast
cancer, metastatic
Monday, October 20
10:15-11:45 a.m. CEST
Vepugratinib (investigational FGFR3 inhibitor)
Phase 1 study of LY3866288,
a potent, highly isoform-
selective FGFR3 inhibitor in
FGFR3-altered advanced solid
tumors (FORAGER-1): Dose
optimization
Alexandra Drakaki
Mini Oral
Abstract #3070MO
Mini oral session 1: GU
tumors, renal & urothelial
Friday, October 17
4:00-5:30 p.m. CEST
LY4170156 (investigational ADC targeting FRα)
Results from the first-in-
human phase 1 study of
LY4170156, an antibody drug
conjugate (ADC) targeting
folate receptor alpha in
recurrent platinum resistant
high-grade serous ovarian
cancer (HGSOC)
Isabelle Ray-Coquard
Poster
Abstract #1067P
Gynaecological cancers
Saturday, October 18
12:00-12:45 p.m. CEST
Translational PK/PD modelling
of LY4170156, an antibody-
drug conjugate linked to
exatecan via a novel cleavable
polysarcosine linker
Bhavana Pothuri
Poster
Abstract #236eP
Biomarkers &
translational research
(agnostic)
Monday, October 20
12:00-12:45 p.m. CEST
Inluriyo (imlunestrant; ER antagonist)
Inluriyo plus abemaciclib
versus fulvestrant plus
abemaciclib in estrogen
receptor positive (ER+), human
epidermal growth factor
receptor 2 negative (HER2-)
advanced breast cancer (ABC):
An indirect treatment
comparison (ITC) of three
phase 3 trials
François Clément Bidard
Poster
Abstract #496P
Breast cancer metastatic
Monday, October 20
12:00-12:45 p.m. CEST
For more information on Lilly’s Oncology pipeline click here.
About Verzenio (abemaciclib)
Verzenio (abemaciclib) is approved to treat people with certain HR+, HER2- breast cancers in the adjuvant and advanced or metastatic settings.
Verzenio is an oral tablet taken twice daily and available in strengths of 50 mg, 100 mg, 150 mg, and 200 mg. Discovered and developed by Lilly researchers, Verzenio was first approved in 2017 and is currently authorized for use in more than 90 counties around the world. For full details on indicated uses of Verzenio in HR+, HER2- breast cancer, please see full Prescribing Information, available at www.Verzenio.com.
INDICATIONS FOR VERZENIO
VERZENIO is a kinase inhibitor indicated:
in combination with endocrine therapy (tamoxifen or an aromatase inhibitor) for the adjuvant treatment of adult patients with hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative, node-positive, early breast cancer at high risk of recurrence.
in combination with an aromatase inhibitor as initial endocrine-based therapy for the treatment of adult patients with hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative advanced or metastatic breast cancer.
in combination with fulvestrant for the treatment of adult patients with hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative advanced or metastatic breast cancer with disease progression following endocrine therapy.
as monotherapy for the treatment of adult patients with HR-positive, HER2-negative advanced or metastatic breast cancer with disease progression following endocrine therapy and prior chemotherapy in the metastatic setting.
IMPORTANT SAFETY INFORMATION FOR VERZENIO (abemaciclib)
Severe diarrhea associated with dehydration and infection occurred in patients treated with Verzenio. Across four clinical trials in 3691 patients, diarrhea occurred in 81 to 90% of patients who received Verzenio. Grade 3 diarrhea occurred in 8 to 20% of patients receiving Verzenio. Most patients experienced diarrhea during the first month of Verzenio treatment. The median time to onset of the first diarrhea event ranged from 6 to 8 days; and the median duration of Grade 2 and Grade 3 diarrhea ranged from 6 to 11 days and 5 to 8 days, respectively. Across trials, 19 to 26% of patients with diarrhea required a Verzenio dose interruption and 13 to 23% required a dose reduction.
Instruct patients to start antidiarrheal therapy, such as loperamide, at the first sign of loose stools, increase oral fluids, and notify their healthcare provider for further instructions and appropriate follow-up. For Grade 3 or 4 diarrhea, or diarrhea that requires hospitalization, discontinue Verzenio until toxicity resolves to ≤Grade 1, and then resume Verzenio at the next lower dose.
Neutropenia, including febrile neutropenia and fatal neutropenic sepsis, occurred in patients treated with Verzenio. Across four clinical trials in 3691 patients, neutropenia occurred in 37 to 46% of patients receiving Verzenio. A Grade ≥3 decrease in neutrophil count (based on laboratory findings) occurred in 19 to 32% of patients receiving Verzenio. Across trials, the median time to first episode of Grade ≥3 neutropenia ranged from 29 to 33 days, and the median duration of Grade ≥3 neutropenia ranged from 11 to 16 days. Febrile neutropenia has been reported in <1% of patients exposed to Verzenio across trials. Two deaths due to neutropenic sepsis were observed in MONARCH 2. Inform patients to promptly report any episodes of fever to their healthcare provider.
Monitor complete blood counts prior to the start of Verzenio therapy, every 2 weeks for the first 2 months, monthly for the next 2 months, and as clinically indicated. Dose interruption, dose reduction, or delay in starting treatment cycles is recommended for patients who develop Grade 3 or 4 neutropenia.
Severe, life-threatening, or fatal interstitial lung disease (ILD) or pneumonitis can occur in patients treated with Verzenio and other CDK4/6 inhibitors. In Verzenio-treated patients in EBC (monarchE), 3% of patients experienced ILD or pneumonitis of any grade: 0.4% were Grade 3 or 4 and there was one fatality (0.1%). In Verzenio-treated patients in MBC (MONARCH 1, MONARCH 2, MONARCH 3), 3.3% of Verzenio-treated patients had ILD or pneumonitis of any grade: 0.6% had Grade 3 or 4, and 0.4% had fatal outcomes. Additional cases of ILD or pneumonitis have been observed in the postmarketing setting, with fatalities reported.
Monitor patients for pulmonary symptoms indicative of ILD or pneumonitis. Symptoms may include hypoxia, cough, dyspnea, or interstitial infiltrates on radiologic exams. Infectious, neoplastic, and other causes for such symptoms should be excluded by means of appropriate investigations. Dose interruption or dose reduction is recommended in patients who develop persistent or recurrent Grade 2 ILD or pneumonitis. Permanently discontinue Verzenio in all patients with Grade 3 or 4 ILD or pneumonitis.
Grade ≥ 3 increases in alanine aminotransferase (ALT) (2 to 6%) and aspartate aminotransferase (AST) (2 to 3%) were reported in patients receiving Verzenio. Across three clinical trials in 3559 patients (monarchE, MONARCH 2, MONARCH 3), the median time to onset of Grade ≥3 ALT increases ranged from 57 to 87 days and the median time to resolution to Grade <3 was 13 to 14 days. The median time to onset of Grade ≥3 AST increases ranged from 71 to 185 days and the median time to resolution to Grade <3 ranged from 11 to 15 days.
Monitor liver function tests (LFTs) prior to the start of Verzenio therapy, every 2 weeks for the first 2 months, monthly for the next 2 months, and as clinically indicated. Dose interruption, dose reduction, dose discontinuation, or delay in starting treatment cycles is recommended for patients who develop persistent or recurrent Grade 2, or any Grade 3 or 4 hepatic transaminase elevation.
Venous thromboembolic events (VTE) were reported in 2 to 5% of patients across three clinical trials in 3559 patients treated with Verzenio (monarchE, MONARCH 2, MONARCH 3). VTE included deep vein thrombosis, pulmonary embolism, pelvic venous thrombosis, cerebral venous sinus thrombosis, subclavian and axillary vein thrombosis, and inferior vena cava thrombosis. In clinical trials, deaths due to VTE have been reported in patients treated with Verzenio.
Verzenio has not been studied in patients with early breast cancer who had a history of VTE. Monitor patients for signs and symptoms of venous thrombosis and pulmonary embolism and treat as medically appropriate. Dose interruption is recommended for EBC patients with any grade VTE and for MBC patients with a Grade 3 or 4 VTE.
Verzenio can cause fetal harm when administered to a pregnant woman, based on findings from animal studies and the mechanism of action. In animal reproduction studies, administration of abemaciclib to pregnant rats during the period of organogenesis caused teratogenicity and decreased fetal weight at maternal exposures that were similar to the human clinical exposure based on area under the curve (AUC) at the maximum recommended human dose. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with Verzenio and for 3 weeks after the last dose. Based on findings in animals, Verzenio may impair fertility in males of reproductive potential. There are no data on the presence of Verzenio in human milk or its effects on the breastfed child or on milk production. Advise lactating women not to breastfeed during Verzenio treatment and for at least 3 weeks after the last dose because of the potential for serious adverse reactions in breastfed infants.
The most common adverse reactions (all grades, ≥10%) observed in monarchE for Verzenio plus tamoxifen or an aromatase inhibitor vs tamoxifen or an aromatase inhibitor, with a difference between arms of ≥2%, were diarrhea (84% vs 9%), infections (51% vs 39%), neutropenia (46% vs 6%), fatigue (41% vs 18%), leukopenia (38% vs 7%), nausea (30% vs 9%), anemia (24% vs 4%), headache (20% vs 15%), vomiting (18% vs 4.6%), stomatitis (14% vs 5%), lymphopenia (14% vs 3%), thrombocytopenia (13% vs 2%), decreased appetite (12% vs 2.4%), ALT increased (12% vs 6%), AST increased (12% vs 5%), dizziness (11% vs 7%), rash (11% vs 4.5%), and alopecia (11% vs 2.7 %).
The most frequently reported ≥5% Grade 3 or 4 adverse reaction that occurred in the Verzenio arm vs the tamoxifen or an aromatase inhibitor arm of monarchE were neutropenia (19.6% vs 1%), leukopenia (11% vs <1%), diarrhea (8% vs 0.2%), and lymphopenia (5% vs <1%).
Lab abnormalities (all grades; Grade 3 or 4) for monarchE in ≥10% for Verzenio plus tamoxifen or an aromatase inhibitor with a difference between arms of ≥2% were increased serum creatinine (99% vs 91%; .5% vs <.1%), decreased white blood cells (89% vs 28%; 19.1% vs 1.1%), decreased neutrophil count (84% vs 23%; 18.7% vs 1.9%), anemia (68% vs 17%; 1% vs .1%), decreased lymphocyte count (59% vs 24%; 13.2 % vs 2.5%), decreased platelet count (37% vs 10%; .9% vs .2%), increased ALT (37% vs 24%; 2.6% vs 1.2%), increased AST (31% vs 18%; 1.6% vs .9%), and hypokalemia (11% vs 3.8%; 1.3% vs 0.2%).
The most common adverse reactions (all grades, ≥10%) observed in MONARCH 3 for Verzenio plus anastrozole or letrozole vs anastrozole or letrozole, with a difference between arms of ≥2%, were diarrhea (81% vs 30%), fatigue (40% vs 32%), neutropenia (41% vs 2%), infections (39% vs 29%), nausea (39% vs 20%), abdominal pain (29% vs 12%), vomiting (28% vs 12%), anemia (28% vs 5%), alopecia (27% vs 11%), decreased appetite (24% vs 9%), leukopenia (21% vs 2%), creatinine increased (19% vs 4%), constipation (16% vs 12%), ALT increased (16% vs 7%), AST increased (15% vs 7%), rash (14% vs 5%), pruritus (13% vs 9%), cough (13% vs 9%), dyspnea (12% vs 6%), dizziness (11% vs 9%), weight decreased (10% vs 3.1%), influenza-like illness (10% vs 8%), and thrombocytopenia (10% vs 2%).
The most frequently reported ≥5% Grade 3 or 4 adverse reactions that occurred in the Verzenio arm vs the placebo arm of MONARCH 3 were neutropenia (22% vs 1%), diarrhea (9% vs 1.2%), leukopenia (7% vs <1%)), increased ALT (6% vs 2%), and anemia (6% vs 1%).
Lab abnormalities (all grades; Grade 3 or 4) for MONARCH 3 in ≥10% for Verzenio plus anastrozole or letrozole with a difference between arms of ≥2% were increased serum creatinine (98% vs 84%; 2.2% vs 0%), decreased white blood cells (82% vs 27%; 13% vs 0.6%), anemia (82% vs 28%; 1.6% vs 0%), decreased neutrophil count (80% vs 21%; 21.9% vs 2.6%), decreased lymphocyte count (53% vs 26%; 7.6% vs 1.9%), decreased platelet count (36% vs 12%; 1.9% vs 0.6%), increased ALT (48% vs 25%; 6.6% vs 1.9%), and increased AST (37% vs 23%; 3.8% vs 0.6%).
The most common adverse reactions (all grades, ≥10%) observed in MONARCH 2 for Verzenio plus fulvestrant vs fulvestrant, with a difference between arms of ≥2%, were diarrhea (86% vs 25%), neutropenia (46% vs 4%), fatigue (46% vs 32%), nausea (45% vs 23%), infections (43% vs 25%), abdominal pain (35% vs 16%), anemia (29% vs 4%), leukopenia (28% vs 2%), decreased appetite (27% vs 12%), vomiting (26% vs 10%), headache (20% vs 15%), dysgeusia (18% vs 2.7%), thrombocytopenia (16% vs 3%), alopecia (16% vs 1.8%), stomatitis (15% vs 10%), ALT increased (13% vs 5%), pruritus (13% vs 6%), cough (13% vs 11%), dizziness (12% vs 6%), AST increased (12% vs 7%), peripheral edema (12% vs 7%), creatinine increased (12% vs <1%), rash (11% vs 4.5%), pyrexia (11% vs 6%), and weight decreased (10% vs 2.2%).
The most frequently reported ≥5% Grade 3 or 4 adverse reactions that occurred in the Verzenio arm vs the placebo arm of MONARCH 2 were neutropenia (25% vs 1%), diarrhea (13% vs 0.4%), leukopenia (9% vs 0%), anemia (7% vs 1%), and infections (5.7% vs 3.5%).
Lab abnormalities (all grades; Grade 3 or 4) for MONARCH 2 in ≥10% for Verzenio plus fulvestrant with a difference between arms of ≥2% were increased serum creatinine (98% vs 74%; 1.2% vs 0%), decreased white blood cells (90% vs 33%; 23.7% vs .9%), decreased neutrophil count (87% vs 30%; 32.5% vs 4.2%), anemia (84% vs 34%; 2.6% vs .5%), decreased lymphocyte count (63% vs 32%; 12.2% vs 1.8%), decreased platelet count (53% vs 15%; 2.1% vs 0%), increased ALT (41% vs 32%; 4.6% vs 1.4%), and increased AST (37% vs 25%; 3.9% vs 4.2%).
The most common adverse reactions (all grades, ≥10%) observed in MONARCH 1 with Verzenio were diarrhea (90%), fatigue (65%), nausea (64%), decreased appetite (45%), abdominal pain (39%), neutropenia (37%), vomiting (35%), infections (31%), anemia (25%), thrombocytopenia (20%), headache (20%), cough (19%), constipation (17%), leukopenia (17%), arthralgia (15%), dry mouth (14%), weight decreased (14%), stomatitis (14%), creatinine increased (13%), alopecia (12%), dysgeusia (12%), pyrexia (11%), dizziness (11%), and dehydration (10%).
The most frequently reported ≥5% Grade 3 or 4 adverse reactions from MONARCH 1 with Verzenio were diarrhea (20%), neutropenia (24%), fatigue (13%), and leukopenia (5%).
Lab abnormalities (all grades; Grade 3 or 4) for MONARCH 1 with Verzenio were increased serum creatinine (99%; .8%), decreased white blood cells (91%; 28%), decreased neutrophil count (88%; 26.6%), anemia (69%; 0%), decreased lymphocyte count (42%; 13.8%), decreased platelet count (41%; 2.3%), increased ALT (31%; 3.1%), and increased AST (30%; 3.8%).
Strong and moderate CYP3A inhibitors increased the exposure of abemaciclib plus its active metabolites to a clinically meaningful extent and may lead to increased toxicity. Avoid concomitant use of ketoconazole. Ketoconazole is predicted to increase the AUC of abemaciclib by up to 16-fold. In patients with recommended starting doses of 200 mg twice daily or 150 mg twice daily, reduce the Verzenio dose to 100 mg twice daily with concomitant use of strong CYP3A inhibitors other than ketoconazole. In patients who have had a dose reduction to 100 mg twice daily due to adverse reactions, further reduce the Verzenio dose to 50 mg twice daily with concomitant use of strong CYP3A inhibitors. If a patient taking Verzenio discontinues a strong CYP3A inhibitor, increase the Verzenio dose (after 3 to 5 half-lives of the inhibitor) to the dose that was used before starting the inhibitor. With concomitant use of moderate CYP3A inhibitors, monitor for adverse reactions and consider reducing the Verzenio dose in 50 mg decrements. Patients should avoid grapefruit products.
Avoid concomitant use of strong or moderate CYP3A inducers and consider alternative agents. Coadministration of strong or moderate CYP3A inducers decreased the plasma concentrations of abemaciclib plus its active metabolites and may lead to reduced activity.
With severe hepatic impairment (Child-Pugh C), reduce the Verzenio dosing frequency to once daily. The pharmacokinetics of Verzenio in patients with severe renal impairment (CLcr <30 mL/min), end stage renal disease, or in patients on dialysis is unknown. No dosage adjustments are necessary in patients with mild or moderate hepatic (Child-Pugh A or B) and/or renal impairment (CLcr ≥30-89 mL/min).
Please see full Prescribing Information and Patient Information for Verzenio.
AL HCP ISI 12OCT2021
About Olomorasib
Olomorasib (LY3537982) is an investigational, oral, potent, and highly selective next-generation inhibitor of the KRAS G12C protein. KRAS is the most common oncogene across all tumor types, and KRAS G12C mutations occur in 13% of patients with non-small cell lung cancer (NSCLC), and 1-3% of patients with other solid tumors.1 Olomorasib was specifically designed to target KRAS G12C mutations and has pharmacokinetic properties which potentially allow for high predicted target occupancy and high potency when used as monotherapy or in combination.2
Olomorasib is currently being studied in combination with pembrolizumab with or without chemotherapy for first-line treatment of KRAS G12C-mutant advanced NSCLC, and other advanced solid tumors, including: NCT06119581 and NCT06890598.
About LY4064809
LY4064809 (STX-478) is an investigational, oral, next-generation inhibitor phosphoinositide 3-kinase alpha (PI3Kα) inhibitor designed to selectively target tumors with PIK3CA mutations while sparing wild-type PI3Kα. Activating mutations in the PIK3CA gene (which encodes PI3Kα enzyme) are oncogenic drivers present in approximately 40% of hormone receptor positive (HR+)/HER2-negative breast cancers and occur at lower frequencies in many other cancers.3,4 LY4064809 is currently being studied in patients with HR+ breast cancer and other solid tumors with PIK3CA mutations, NCT05768139.5
About Vepugratinib (LY3866288/LOXO-435)
Vepugratinib is an investigational, oral, isoform-selective fibroblast growth factor receptor 3 (FGFR3) inhibitor that has shown antitumor activity across FGFR3-mutant in vivo preclinical models, with preserved potency against FGFR3 gatekeeper resistance mutants.6 Inhibition of oncogenic FGFR3 shows clinical benefit in advanced urothelial cancer; however, currently approved FGFR-targeted therapies that are not selective for FGFR3 demonstrate dose-limiting off target toxicities, and susceptibility to resistance mutations.
Vepugratinib is designed to selectively target FGFR3 alterations with the goal of avoiding dose-limiting hyperphosphatemia and other clinical adverse events that drive chronic intolerance to pan-FGFR inhibitors.6 Vepugratinib is currently being studied in an open-label, multicenter, Phase 1a/b study in patients with FGFR3-altered advanced urothelial carcinoma and other solid tumors, NCT05614739.
About LY4170156
LY4170156 is an investigational, next-generation ADC targeting folate receptor alpha (FRα). Folate receptor alpha (FRα) is a cell-surface glycoprotein encoded by the gene FOLR1 that binds to the essential nutrients folic acid and reduced folates, bringing them into cells to facilitate cell division and growth.7 FRα is overexpressed in many solid tumors such as ovarian, non-small cell lung, and colorectal cancers.7
LY4170156 was designed to target FRα across expression levels with improved therapeutic index. LY4170156 is composed of a Fcγ silent, humanized monoclonal antibody, a proprietary polysarcosine hydrophobicity masking agent (PSARlink) with a cleavable linker, and a topoisomerase 1 inhibitor exatecan payload. LY4170156 is currently being studied in patients with ovarian cancer as well as other FRα-expressing solid tumors, NCT06400472.
About Inluriyo (imlunestrant)
Inluriyo (imlunestrant) (pronounced en-loo-ree-yoh) is an oral estrogen receptor antagonist that delivers continuous ER inhibition, including in ESR1-mutant cancers. The estrogen receptor (ER) is the key therapeutic target for patients with estrogen receptor-positive (ER+), human epidermal growth factor receptor 2-negative (HER2–) breast cancer. Inluriyo is a U.S. FDA approved oral prescription medicine, 200 mg tablets taken as a once-daily dose of 400 mg taken on an empty stomach, at least 2 hours before food or 1 hour after food. Inluriyo is also currently being studied in combination with abemaciclib for advanced breast cancer and as an adjuvant treatment in early breast cancer, including: NCT04975308, NCT05514054 and NCT04188548.
INDICATION FOR INLURIYO (imlunestrant)
INLURIYO is indicated for the treatment of adults with estrogen receptor (ER)-positive, human epidermal growth factor receptor 2 (HER2)-negative, estrogen receptor-1 (ESR1)-mutated advanced or metastatic breast cancer with disease progression following at least one line of endocrine therapy.
IMPORTANT SAFETY INFORMATION FOR INLURIYO
Warnings and Precautions — Embryo-Fetal Toxicity
Based on findings in animals and its mechanism of action, Inluriyo can cause fetal harm when administered to a pregnant woman. In an animal reproduction study, oral administration of imlunestrant to pregnant rats during the period of organogenesis led to embryo-fetal mortality and structural abnormalities at maternal exposures that were below the human exposure at the recommended dose based on area under the curve (AUC). Avoid the use of imlunestrant in pregnant women. Advise pregnant women and females of reproductive potential of the potential risk to a fetus. Advise females of reproductive potential and males with female partners of reproductive potential to use effective contraception during treatment with Inluriyo and for 1 week after the last dose.
Serious and Fatal Adverse Reactions
Serious adverse reactions occurred in 10% of patients who received Inluriyo. Serious adverse reactions in >1% of patients included pleural effusion (1.2%). Fatal adverse reactions occurred in 1.8% of patients who received Inluriyo, including cardiac arrest, acute myocardial infarction, right ventricular failure, hypovolemic shock, and upper gastrointestinal hemorrhage (each 0.3%).
Most Common Adverse Reactions
The most common adverse reactions (incidence ≥10%), including laboratory abnormalities, in patients who received Inluriyo were: hemoglobin decreased (30%), musculoskeletal pain (30%), calcium decreased (26%), neutrophils decreased (26%), AST increased (25%), fatigue (23%), diarrhea (22%), ALT increased (21%), triglycerides increased (21%), nausea (17%), platelets decreased (16%), constipation (10%), cholesterol increased (10%), and abdominal pain (10%).
Drug Interactions
Imlunestrant is a CYP3A substrate. Avoid concomitant use of Inluriyo with strong CYP3A inhibitors. If concomitant use cannot be avoided, reduce the dosage of Inluriyo. Avoid concomitant use of Inluriyo with strong CYP3A inducers. If concomitant use cannot be avoided, increase the dosage of Inluriyo.
Imlunestrant inhibits both P-gp and BCRP. Avoid concomitant use unless otherwise recommended in the Prescribing Information for P-gp or BCRP substrates where minimal concentration changes may lead to serious adverse reactions.
Use in Specific Populations — Lactation
Because of the potential for serious adverse reactions in the breastfed child, advise lactating women to not breastfeed during treatment with Inluriyo and for 1 week after the last dose.
Use in Specific Populations — Hepatic Impairment
Reduce the dose of Inluriyo for patients with moderate (Child-Pugh B) or severe (Child-Pugh C) hepatic impairment. No dosage adjustment is recommended for patients with mild hepatic impairment (Child-Pugh A).
Inluriyo (imlunestrant) is available as 200 mg tablets.
Please click to access Prescribing Information for Inluriyo.