Multiple systemic immune-oncology (IO) combination therapies have demonstrated overall survival (OS) benefits in metastatic renal clear cell carcinoma (mRCC). However, the magnitude of benefits over time has not been compared in a structured fashion. To assess OS and progression free survival (PFS) efficacy as reflected by hazard ratios [HR]) according to the duration of follow-up over time for each of four IO combination therapies. A systematic PubMed (MEDLINE) literature review was performed (January, 1, 2016 to February, 20, 2022). Only phase III randomized clinical trials with proven OS benefit relative to sunitinib were included. These search criteria yielded four eligible RCTs: CheckMate 214 (nivolumab plus ipilimumab), Keynote 426 (pembrolizumab plus axitinib), CheckMate 9ER (nivolumab plus cabozantinib), CLEAR (lenvatinib plus pembrolizumab). OS and PFS HRs were tabulated for all four studies including all reported timepoints. Median follow-up ranged from 25-68 months for CheckMate 214 (5 timepoints), 13-43 months for Keynote 426 (3 timepoints), 18-33 months for CheckMate 9ER (3 timepoints) and 27-34 months for CLEAR (2 timepoints). Respective OS and PFS HRs were 0.68-0.72 and 0.98-0.86, 0.53-0.73 and 0.69-0.68, 0.60-0.70 and 0.51-0.56, 0.66-0.72 and 0.39-0.47 for CheckMate 214, Keynote 426, CheckMate 9ER and CLEAR. Regarding OS HRs virtually no change was recorded over time for CheckMate 214, but a decrease in magnitude occurred in the three IO-TKI remaining studies. Regarding PFS HRs, no benefit was recorded for CheckMate 214. Statistically significant benefit was recorded in the remaining IO-TKI studies. However, it also decreased with longer follow-up. It remains to be seen, whether further 'slippage' of efficacy will persist as the data matures further for all IO-TKI combinations.
Seminars in oncology. 2022 Oct 23 [Epub ahead of print]
Benedikt Hoeh, Rocco Simone Flammia, Lukas Hohenhorst, Gabriele Sorce, Andrea Panunzio, Stefano Tappero, Zhe Tian, Fred Saad, Michele Gallucci, Alberto Briganti, Carlo Terrone, Shahrokh F Shariat, Markus Graefen, Derya Tilki, Alessandro Antonelli, Marina Kosiba, Luis A Kluth, Andreas Becker, Felix K H Chun, Pierre I Karakiewicz
Department of Urology, University Hospital Frankfurt, Goethe University Frankfurt am Main, Frankfurt am Main, Hessen, Germany; Cancer Prognostics and Health Outcomes Unit, Division of Urology, University of Montréal Health Center, Montréal, Québec, Canada. Electronic address: ., Cancer Prognostics and Health Outcomes Unit, Division of Urology, University of Montréal Health Center, Montréal, Québec, Canada; Department of Maternal-Child and Urological Sciences, Sapienza Rome University, Policlinico Umberto I Hospital, Rome, Italy., Cancer Prognostics and Health Outcomes Unit, Division of Urology, University of Montréal Health Center, Montréal, Québec, Canada; Martini-Klinik Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany., Cancer Prognostics and Health Outcomes Unit, Division of Urology, University of Montréal Health Center, Montréal, Québec, Canada; Division of Experimental Oncology/Unit of Urology, URI, Urological Research Institute, IRCCS San Raffaele Scientific Institute, Milan, Italy., Cancer Prognostics and Health Outcomes Unit, Division of Urology, University of Montréal Health Center, Montréal, Québec, Canada; Department of Urology, University of Verona, Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy., Cancer Prognostics and Health Outcomes Unit, Division of Urology, University of Montréal Health Center, Montréal, Québec, Canada; Department of Surgical and Diagnostic Integrated Sciences (DISC), University of Genova, Genova, Italy., Cancer Prognostics and Health Outcomes Unit, Division of Urology, University of Montréal Health Center, Montréal, Québec, Canada., Department of Maternal-Child and Urological Sciences, Sapienza Rome University, Policlinico Umberto I Hospital, Rome, Italy., Division of Experimental Oncology/Unit of Urology, URI, Urological Research Institute, IRCCS San Raffaele Scientific Institute, Milan, Italy., Department of Surgical and Diagnostic Integrated Sciences (DISC), University of Genova, Genova, Italy., Department of Urology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria; Department of Urology, Weill Cornell Medical College, New York, New York, USA; Department of Urology, University of Texas Southwestern, Dallas, Texas, USA; Hourani Center for Applied Scientific Research, Al-Ahliyya Amman University, Amman, Jordan., Martini-Klinik Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany., Martini-Klinik Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany; Department of Urology, University Hospital Hamburg-Eppendorf, Hamburg, Germany; Department of Urology, Koc University Hospital, Istanbul, Turkey., Department of Urology, University of Verona, Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy., Department of Urology, University Hospital Frankfurt, Goethe University Frankfurt am Main, Frankfurt am Main, Hessen, Germany.