May 28, 2020: “Merck is known as MSD outside the United States and Canada, and Eisai announced new data from analyses of two trials evaluating KEYTRUDA, Merck’s anti-PD-1 therapy, plus LENVIMA, an orally available multiple receptor tyrosine kinase inhibitor discovered by Eisai.
In the KEYNOTE-524/Study 116 and KEYNOTE-146/Study 111 trials, the KEYTRUDA plus LENVIMA combination demonstrated clinically meaningful objective response rates (ORR) in patients with unresectable hepatocellular carcinoma (HCC) with no prior systemic therapy and in patients with metastatic clear cell renal cell carcinoma (ccRCC) who progressed following immune checkpoint inhibitor therapy, respectively.
“The tumor response rates demonstrated with KEYTRUDA plus LENVIMA in these studies underscore the potential of this combination regimen in certain types of hepatocellular and renal cell carcinoma,” said Dr. Jonathan Cheng, Vice President, Oncology Clinical Research, Merck Research Laboratories.
“KEYTRUDA plus LENVIMA is an important pillar of our broad oncology research program, and we continue to advance the study of the combination across multiple types of cancers and stages of the disease.”
“As data from our combination trials continue to read out, our enthusiasm for and belief in the potential of KEYTRUDA plus LENVIMA are strengthened by the growing body of evidence observed in multiple advanced cancers,” said Dr. Takashi Owa, Chief Medicine Creation and Chief Discovery Officer, Oncology Business Group at Eisai.
“Our ongoing clinical study efforts on this combination exemplify our commitment to following the science and exploring possible solutions for patients affected by difficult-to-treat cancers.”
More Related News: Merck’s KEYTRUDA® Superior to Standard of Care Chemotherapy in Patients with MSI-H Colorectal Cancer
KEYNOTE-524/Study 116 Trial Design and Data (Abstract #4519)
KEYNOTE-524/Study 116 (ClinicalTrials.gov, NCT03006926) is a Phase 1b, open-label, single-arm trial evaluating the KEYTRUDA plus LENVIMA combination in 100 patients with unresectable HCC with no prior systemic therapy.
Patients have treated with KEYTRUDA 200 mg intravenously every three weeks in combination with LENVIMA 8 or 12 mg (based on baseline body weight ˂60 kilograms or ≥60 kilograms, respectively) orally once daily.
The primary endpoints are ORR and duration of response (DOR) by modified Response Evaluation Criteria in Solid Tumors (mRECIST) and RECIST v1.1 per independent imaging review (IIR). Secondary endpoints include progression-free survival (PFS), time to progression (TTP) and overall survival (OS).
At data cutoff (Oct. 31, 2019) and a median duration of follow-up of 10.6 months (95% CI: 9.2-11.5), 37 patients were still on study treatment (KEYTRUDA plus LENVIMA: n=34; LENVIMA only: n=3), and the median duration of treatment exposure to the KEYTRUDA plus LENVIMA combination was 7.9 months (range: 0.2-31.1).
The final analysis of the study’s primary endpoints showed the KEYTRUDA plus LENVIMA combination demonstrated an ORR of 36% (n=36) (95% CI: 26.6-46.2), with a complete response rate of 1% (n=1) and a partial response rate of 35% (n=35), and a median DOR of 12.6 months (95% CI: 6.9-not estimable [NE]), using RECIST v1.1 criteria per IIR.
As assessed using mRECIST criteria per IIR, the KEYTRUDA plus LENVIMA combination demonstrated an ORR of 46% (n=46) (95% CI: 36.0-56.3), with a complete response rate of 11% (n=11) and a partial response rate of 35% (n=35), and a median DOR of 8.6 months (95% CI: 6.9-NE).
Treatment-related adverse events (TRAEs) led to discontinuation of KEYTRUDA and LENVIMA in 6% of patients, discontinuation of KEYTRUDA in 10% of patients, and discontinuation of LENVIMA in 14% of patients. Grade ≥3 TRAEs occurred in 67% of patients (Grade 3: 63%; Grade 4: 1%; Grade 5: 3%).
There was one Grade 4 TRAE (leukopenia/neutropenia), and there were three Grade 5 treatment-related deaths (acute respiratory failure/acute respiratory distress syndrome, intestinal perforation and abnormal hepatic function; n=1 for each).
The most common TRAEs of any grade (≥20%) were hypertension (36%), diarrhoea (35%), fatigue (30%), decreased appetite (28%), hypothyroidism (25%), palmar-plantar erythrodysesthesia syndrome (23%), decreased weight (22%), dysphonia (21%), increased aspartate aminotransferase (20%) and proteinuria (20%).
KEYTRUDA is an anti-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 1,200 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.”