Abstract 2091
Background
KEYNOTE-427 (NCT02853344) is an open-label, single-arm, phase 2 study to evaluate efficacy and safety of first-line single-agent pembro in patients (pts) with ccRCC (cohort A) and non–ccRCC (cohort B). Updated follow-up data from cohort A are presented.
Methods
Pts with histologically confirmed ccRCC, measurable per RECIST v1.1, and no prior systemic therapy were eligible. Pts received pembro 200 mg IV Q3W for 2 y or until confirmed progressive disease, unacceptable toxicity, or pt decision to withdraw. Primary end point: objective response rate (ORR; RECIST v1.1 by blinded independent central review). Additional end points: duration of response (DOR), progression-free survival (PFS), overall survival (OS), and safety.
Results
110 pts enrolled; median (range) follow-up was 22.6 (2.5-27.5) mo. Median age was 64 (29-87) y; 38.2%, 47.3%, and 14.5% of pts had favorable, intermediate, and poor IMDC risk, respectively; 47.3% of tumors were PD-L1 positive. Confirmed ORR was 36.4% (95% CI, 27.4-46.1; 3 [2.7%] CR, 37 [33.6%] PR) and median (range) DOR was not reached (2.3 - 23.5+ mo). For responding pts, 64.0% had a response ≥12 mo (Kaplan-Meier estimates). Median PFS was 7.1 mo (95% CI, 5.6-11.0) and median OS was not reached; 12 mo PFS and OS rates were 37.6% and 88.2%, respectively. By IMDC, confirmed ORR was 39.7% for immediate/poor risk and 31.0% for favorable risk. For responding pts, 80.9% and 69.2% of immediate/poor and favorable risk, respectively had a response ≥6 mo; 65.5% and 61.5%, respectively, had a response ≥12 mo. For sarcomatoid differentiated tumors (n = 11), confirmed ORR was 63.6%; 71.4% had a response of ≥ 12 mo. By PD-L1 status, confirmed ORR was 44.2% and 29.3% for positive and negative, respectively. Treatment-related AEs occurred in 81.8%, with fatigue (29.1%) and pruritus (28.2%) the most common. One pt died of treatment-related pneumonitis.
Conclusions
With a median of 23-mo follow-up, first-line pembro monotherapy continued to show promising efficacy in pts with advanced ccRCC. Safety profile was comparable to previously reported.
Clinical trial identification
NCT02853344, August 2, 2016.
Editorial acknowledgement
Matthew Grzywacz, PhD, of the ApotheCom pembrolizumab team (Yardley, PA, USA), funded by Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc., Kenilworth, NJ, USA.
Legal entity responsible for the study
Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc., Kenilworth, NJ, USA.
Funding
Funding for this research was provided by Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc., Kenilworth, NJ, USA.
Disclosure
J.M.G. Larkin: Honoraria (self): Achilles, AZ, Boston Biomedical, BMS, Eisai, EUSA Pharma, GSK, Ipsen, Imugene, Incyte, iOnctura, Kymab, Merck Serono, MSD, Nektar, Novartis, Pierre Fabre, Pfizer, Roche / Genentech, Secarna, Vitaccess; Advisory / Consultancy: Achilles, AZ, Boston Biomedical, BMS, Eisai, EUSA Pharma, GSK, Ipsen, Imugene, Incyte, iOnctura, Kymab, Merck Serono, MSD, Nektar, Novartis, Pierre Fabre, Pfizer, Roche / Genentech, Secarna, Vitaccess; Travel / Accommodation / Expenses: Achilles, AZ, Boston Biomedical, BMS, Eisai, EUSA Pharma, GSK, Ipsen, Imugene, Incyte, iOnctura, Kymab, Merck Serono, MSD, Nektar, Novartis, Pierre Fabre, Pfizer, Roche / Genentech, Secarna, Vitaccess; Research grant / Funding (institution): BMS, MSD, Novartis, Pfizer, Achilles Therapeutics, Roche, Nektar Therapeutics, Covance, Immunocore, Pharmacyclics, Aveo. S.S. Tykodi: Advisory / Consultancy, Research grant / Funding (institution): Calithera Biosciences; Advisory / Consultancy, Research grant / Funding (institution): Prometheus Laboratories; Research grant / Funding (institution): Merck; Advisory / Consultancy, Research grant / Funding (institution): Bristol-Myers Squibb; Research grant / Funding (institution): Peloton Therapeutics; Research grant / Funding (institution): Nektar Therapeutics; Research grant / Funding (institution): Jounce Therapeutics; Research grant / Funding (institution): Pfizer; Research grant / Funding (institution): Genentech; Research grant / Funding (institution): ARGOS Therapeutics. F. Donskov: Honoraria (institution): Pfizer; Honoraria (institution): Ipsen. J. Malik: Advisory / Consultancy: Eisai; Travel / Accommodation / Expenses: Eusa. B.Y. Alekseev: Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: Astellas; Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: AstraZeneca; Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: Bayer; Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: BMS; Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: Ferring; Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: Janssen; Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: MSD; Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: Pfizer; Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: Roche; Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: Sanofi. V.B. Matveev: Honoraria (self), Advisory / Consultancy: Bayer; Honoraria (self), Advisory / Consultancy: Bristol-Myers Squibb; Honoraria (self), Advisory / Consultancy: Janssen; Honoraria (self), Advisory / Consultancy: Astellas. P.F. Geertsen: Research grant / Funding (institution), Travel / Accommodation / Expenses: Novartis; Travel / Accommodation / Expenses: BMS; Travel / Accommodation / Expenses: Pfizer. P.J. Wiechno: Honoraria (self): Bayer; Honoraria (self): BMS; Honoraria (self), Travel / Accommodation / Expenses: Pfizer; Honoraria (self): Astellas; Honoraria (self): Ipsen; Honoraria (self): Janssen-Cilag; Honoraria (self): Novartis. F. Pouliot: Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony: Amgen; Honoraria (self), Honoraria (institution), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (institution): Astellas; Honoraria (self), Honoraria (institution), Advisory / Consultancy: Janssen; Honoraria (self), Honoraria (institution), Advisory / Consultancy, Speaker Bureau / Expert testimony, Research grant / Funding (institution), Travel / Accommodation / Expenses: Sanofi; Honoraria (self), Research grant / Funding (institution), Travel / Accommodation / Expenses: Bayer; Advisory / Consultancy: Progenics. T. Alonso Gordoa: Advisory / Consultancy: BMS; Advisory / Consultancy: MSD; Advisory / Consultancy, Research grant / Funding (self): Roche; Advisory / Consultancy, Speaker Bureau / Expert testimony: Astellas; Advisory / Consultancy, Speaker Bureau / Expert testimony: Ipsen; Advisory / Consultancy, Travel / Accommodation / Expenses: Sanofi; Speaker Bureau / Expert testimony, Travel / Accommodation / Expenses: Pfizer; Speaker Bureau / Expert testimony: Janssen; Speaker Bureau / Expert testimony: Novartis. R. Kloss Silverman: Full / Part-time employment: Merck & Co., Inc. R.F. Perini: Shareholder / Stockholder / Stock options, Full / Part-time employment: Merck & Co., Inc. C. Schloss: Shareholder / Stockholder / Stock options, Full / Part-time employment: Merck & Co., Inc. D.F. McDermott: Honoraria (self), Advisory / Consultancy, Research grant / Funding (institution): BMS; Honoraria (self), Advisory / Consultancy, Research grant / Funding (institution): Pfizer; Honoraria (self), Advisory / Consultancy, Research grant / Funding (institution): Merck; Honoraria (self), Advisory / Consultancy, Research grant / Funding (institution): Novartis; Honoraria (self), Advisory / Consultancy, Research grant / Funding (institution): Exelixis; Honoraria (self), Advisory / Consultancy: Array BioPharm; Honoraria (self), Advisory / Consultancy: Genentech BioOncology; Honoraria (self), Advisory / Consultancy, Research grant / Funding (institution): Alkermes; Honoraria (self), Advisory / Consultancy: Jounce Therapeutics; Honoraria (self), Advisory / Consultancy, Research grant / Funding (institution): X4 Pharma; Honoraria (self), Advisory / Consultancy, Research grant / Funding (institution): Peloton Therapeutics; Honoraria (self), Advisory / Consultancy: EMD Serono; Honoraria (self), Advisory / Consultancy: Eli Lilly; Research grant / Funding (institution): Prometheus Laboratories; Research grant / Funding (institution): Genentech. M.B. Atkins: Advisory / Consultancy, Research grant / Funding (institution): BMS; Advisory / Consultancy: Merck; Advisory / Consultancy, Research grant / Funding (institution): Novartis; Advisory / Consultancy, Research grant / Funding (institution): Genentech/Roche; Advisory / Consultancy: Pfizer; Advisory / Consultancy: Exelixis; Advisory / Consultancy: Eisai; Advisory / Consultancy: AstraZeneca; Advisory / Consultancy: Array. All other authors have declared no conflicts of interest.
Resources from the same session
5544 - Evaluation of a radiomic signature of CD8 cells in patients treated with immunotherapy-radiotherapy in three clinical trials.
Presenter: Roger Sun
Session: Poster Display session 3
Resources:
Abstract
1117 - Biomarkers predictive of overall survival in advanced cancer patients treated with a peptide-based cancer vaccine.
Presenter: Shigetaka Suekane
Session: Poster Display session 3
Resources:
Abstract
1922 - Expression of PD-L1 in plasma exosomes of NSCLC patients and its associations with PD-L1 expression of corresponding tumor tissues
Presenter: Shaorong Yu
Session: Poster Display session 3
Resources:
Abstract
5495 - Patient’s perspective on digital biomarkers in advanced urologic malignancies
Presenter: Severin Rodler
Session: Poster Display session 3
Resources:
Abstract
3166 - A comprehensive Pan-cancer study of FGFR Aberrations in Chinese cancer patients
Presenter: Yang Gao
Session: Poster Display session 3
Resources:
Abstract
3277 - A Systemic Inflammation Response Index (SIRI) correlates with survival and could be a Predictive Factor for mFOLFIRINOX in Metastatic Pancreatic Cancer (PC)
Presenter: Vilma Pacheco-Barcia
Session: Poster Display session 3
Resources:
Abstract
2680 - Circulating biomarkers and risk of immune-related adverse events (irAEs) in patients (pts) with advanced Non-small cell lung cancer (aNSCLC) and metastatic melanoma (mMel)
Presenter: Alberto Pavan
Session: Poster Display session 3
Resources:
Abstract
4066 - Breast cancer in young women of Kazakh population depending on germline mutations: results of next-generation sequencing
Presenter: Dilyara Kaidarova
Session: Poster Display session 3
Resources:
Abstract
5514 - Discovery of an ImmunoTranscriptomics signature in blood for early colorectal cancer detection
Presenter: Paolo Angelino
Session: Poster Display session 3
Resources:
Abstract
1595 - Serum Netrin-1 as a Biomarker for Colorectal Cancer Detection
Presenter: Jinzhou Zhu
Session: Poster Display session 3
Resources:
Abstract