PMID- 37848259 OWN - NLM STAT- MEDLINE DCOM- 20231023 LR - 20231025 IS - 2051-1426 (Electronic) IS - 2051-1426 (Linking) VI - 11 IP - 10 DP - 2023 Oct TI - Efficacy and safety of cosibelimab, an anti-PD-L1 antibody, in metastatic cutaneous squamous cell carcinoma. LID - 10.1136/jitc-2023-007637 [doi] LID - e007637 AB - BACKGROUND: Programmed cell death receptor-1 (PD-1)-blocking antibodies are approved to treat metastatic or locally advanced cutaneous squamous cell carcinoma (CSCC) cases ineligible for curative surgery or radiation. Notwithstanding, some patients experience inadequate responses or severe immune-related adverse events (AEs), indicating the need for improved therapies. Cosibelimab is a high-affinity programmed cell death-ligand 1 (PD-L1)-blocking antibody that activates innate and adaptive immunity by blocking PD-L1 interaction with PD-1 and B7-1 receptors. It is an unmodified immunoglobulin G1 subtype with a functional Fc domain capable of inducing antibody-dependent cellular cytotoxicity and complement-dependent cytotoxicity. Here, we present results of the pivotal study of patients with metastatic CSCC from an open-label, multicenter, multiregional, multicohort, phase 1 trial of cosibelimab. METHODS: In this trial, participants with metastatic CSCC received cosibelimab 800 mg intravenously every 2 weeks. Primary endpoint was objective response rate (ORR) by independent central review using Response Evaluation Criteria in Solid Tumors, V.1.1. Secondary endpoints included duration of response (DOR) and safety. RESULTS: Objective response was observed in 37 of 78 participants (47.4% (95% CI: 36.0% to 59.1%)), with median follow-up of 15.4 months (range: 0.4 to 40.5) as of data cut-off. Median DOR was not reached (range: 1.4+ to 34.1+ months), with response ongoing in 73.0% of participants. Common treatment-emergent AEs (>/=15%) were fatigue (26.9%), rash (16.7%), and anemia (15.4%). Eighteen participants (23.1%) experienced immune-related AEs (grade 3: n=2 (2.6%); no grade 4/5). No treatment-related deaths were reported. CONCLUSIONS: Cosibelimab demonstrated clinically meaningful ORR and DOR and was associated with a manageable safety profile. TRIAL REGISTRATION NUMBER: NCT03212404. CI - (c) Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. FAU - Clingan, Philip AU - Clingan P AD - Southern Medical Day Care Centre, Wollongong, New South Wales, Australia. FAU - Ladwa, Rahul AU - Ladwa R AD - Princess Alexandra Hospital, University of Queensland, Brisbane, Queensland, Australia. FAU - Brungs, Daniel AU - Brungs D AD - Southern Medical Day Care Centre, Wollongong, New South Wales, Australia. AD - Graduate School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia. FAU - Harris, Dean Laurence AU - Harris DL AD - Christchurch Hospital, Christchurch, New Zealand. FAU - McGrath, Margaret AU - McGrath M AD - Medical Oncology, Gallipoli Medical Research Foundation, Greenslopes Private Hospital, Greenslopes, Queensland, Australia. FAU - Arnold, Susan AU - Arnold S AD - Exellentis Clinical Trial Consultants, George, South Africa. FAU - Coward, Jermaine AU - Coward J AD - ICON Cancer Centre, South Brisbane, Queensland, Australia. FAU - Fourie, Samuel AU - Fourie S AD - Wilgers Oncology Centre, Pretoria, South Africa. FAU - Kurochkin, Andriy AU - Kurochkin A AD - Municipal Nonprofit Enterprise of Sumy Regional Council Sumy Regional Clinical Oncology Dispensary, Sumy, Ukraine. FAU - Malan, Daniel R AU - Malan DR AD - Phoenix Pharma, Port Elizabeth, South Africa. FAU - Mant, Andrew AU - Mant A AD - Medical Oncology Unit, Eastern Health, Melbourne, Victoria, Australia. FAU - Sharma, Vinay AU - Sharma V AD - Wits Clinical Research Chris Hani Baragwanath Clinical Trial Site, Johannesburg, South Africa. FAU - Shue, Hong AU - Shue H AD - Sunshine Coast Haematology and Oncology Clinic, Buderim, Queensland, Australia. FAU - Tazbirkova, Andrea AU - Tazbirkova A AD - Medical Oncology, Pindara Private Hospital, Gold Coast, Queensland, Australia. FAU - Berciano-Guerrero, Miguel-Angel AU - Berciano-Guerrero MA AUID- ORCID: 0000-0002-5437-5196 AD - Medical Oncology Intercenter Unit, Regional and Virgen de la Victoria University Hospitals, IBIMA, Malaga, Spain. FAU - Charoentum, Chaiyut AU - Charoentum C AD - Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Maharaj Nakorn Chiang Mai Hospital, Chiang Mai, Thailand. FAU - Dalle, Stephane AU - Dalle S AD - Hospices Civils de Lyon - Hopital Lyon Sud, Pierre-Benite, France. FAU - Dechaphunkul, Arunee AU - Dechaphunkul A AD - Songklanagarind Hospital, Prince of Songkla University, Songkhla, Thailand. FAU - Dudnichenko, Oleksandr AU - Dudnichenko O AD - Kharkiv Medical Academy of Postgraduate Education, Chair of Oncology and Children's Oncology, Clinical base State institution "VT Zaycev Institute of General and Urgent Surgery of National Academy Medical Sciences of Ukraine", Kharkiv, Ukraine. FAU - Koralewski, Piotr AU - Koralewski P AD - Szpital Specjalistyczny im. Ludwika Rydygiera w Krakowie Sp. z o.o., Oddzial Onkologii Klinicznej z Pododdzialem Dziennym, Krakow, Poland. FAU - Lugowska, Iwona AU - Lugowska I AD - Narodowy Instytut Onkologii im. Marii Sklodowskiej-Curie Panstwowy Instytut Badawczy, Oddzial Badan Wczesnych Faz, Warsaw, Poland. FAU - Montaudie, Henri AU - Montaudie H AD - Centre Hospitalier Universitaire de Nice - Hopital l'Archet, Nice, France. FAU - Munoz-Couselo, Eva AU - Munoz-Couselo E AD - Hospital Universitario Vall d'Hebron, Passeig de la Vall d'Hebron, Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain. FAU - Sriuranpong, Virote AU - Sriuranpong V AD - King Chulalongkorn Memorial Hospital, Bangkok, Thailand. FAU - Oliviero, James AU - Oliviero J AUID- ORCID: 0009-0009-9857-1189 AD - Checkpoint Therapeutics Inc, Waltham, Massachusetts, USA jfo@checkpointtx.com. FAU - Desai, Jayesh AU - Desai J AD - Department of Medical Oncology, Peter MacCallum Cancer Centre; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria, Australia. LA - eng SI - ClinicalTrials.gov/NCT03212404 PT - Journal Article PT - Multicenter Study PT - Research Support, Non-U.S. Gov't PL - England TA - J Immunother Cancer JT - Journal for immunotherapy of cancer JID - 101620585 RN - 0 (B7-H1 Antigen) RN - 0 (Programmed Cell Death 1 Receptor) RN - 0 (Antibodies, Monoclonal) RN - 0 (Immune Checkpoint Inhibitors) SB - IM MH - Humans MH - *Carcinoma, Squamous Cell/drug therapy MH - B7-H1 Antigen/metabolism MH - Programmed Cell Death 1 Receptor/therapeutic use MH - *Skin Neoplasms/drug therapy MH - Antibodies, Monoclonal/therapeutic use MH - Immune Checkpoint Inhibitors/therapeutic use PMC - PMC10582968 OTO - NOTNLM OT - Immune Checkpoint Inhibitors OT - Immunotherapy OT - Programmed Cell Death 1 Receptor OT - Skin Neoplasms COIS- Competing interests: PC has nothing to disclose. RL has received honoraria from AstraZeneca/MedImmune, Bristol Myers Squibb Foundation, MSD, and Sanofi; has served as a consultant and/or scientific advisor for AstraZeneca/MedImmune and Roche; and has received compensation for travel, accommodations, and other expenses from MSD. DB has nothing to disclose. DLH has served as a consultant and/or scientific advisor for Checkpoint Therapeutics. MM has nothing to disclose. SA has nothing to disclose. JC has nothing to disclose. SF has nothing to disclose. AK has nothing to disclose. DRM has nothing to disclose. AM has nothing to disclose. VSh has served as a speaker for Elekta. HS has nothing to disclose. AT has nothing to disclose. M-AB-G has served as a consultant and/or scientific advisor for BMS, Eisai, MSD, Novartis, and Pierre Fabre and has received research funding from Novartis. CC has received grant/research support from AstraZeneca, Novartis, and Roche. SD has received institutional research grants from BMS and MSD; has served as a consultant and/or scientific advisor for BMS, MSD, and Pierre Fabre; and has received compensation for congress attendance from BMS and MSD. AD has nothing to disclose. OD has nothing to disclose. PK has nothing to disclose. IL has financial or non-financial interests in Agenus, BMS, Janssen, MacroGenics, MSD, Pfizer, and Roche. HM has received honoraria from BMS, Merck Serono, MSD, Novartis, and Pierre Fabre; has received institutional support from BMS, Canceropole PACA, and Societe Francaise de Dermatologie; has served as a consultant for BMS, Merck Serono, MSD, Novartis, and Pierre Fabre; has served on a data safety monitoring board/advisory board for Novartis and Pierre Fabre; and has received travel grants from Novartis and Pierre Fabre. EM-C has served as a consultant and/or scientific advisor for MBS, MSD, Novartis, Pierre Fabre, and Sanofi; has received honoraria from MBS, MSD, Novartis, Pierre Fabre, and Sanofi; and has received compensation for travel, accommodations, and other expenses from MSD. VSr has nothing to disclose. JO is an employee of Checkpoint Therapeutics and holds stocks and other ownership interests in the company; has served in leadership roles at Checkpoint Therapeutics; and has received compensation for travel, accommodations, and other expenses from Checkpoint Therapeutics. JD has served as a consultant and/or scientific advisor for Amgen, Bayer, BeiGene, Boehringer Ingelheim, Daiichi Sankyo, GlaxoSmithKline, Merck KGaA, Novartis, Novotech, Pfizer, Pierre Fabre, and Roche/Genentech; has served on a data safety monitoring board/advisory board for Boehringer Ingelheim and Pfizer; has served as a board director for Cancer Trials Australia and ANZSA; and has received institutional grant/research support from AstraZeneca/MedImmune, BeiGene, BMS, GlaxoSmithKline, Lilly, Novartis, and Roche. EDAT- 2023/10/18 00:43 MHDA- 2023/10/23 01:18 PMCR- 2023/10/17 CRDT- 2023/10/17 20:53 PHST- 2023/09/15 00:00 [accepted] PHST- 2023/10/23 01:18 [medline] PHST- 2023/10/18 00:43 [pubmed] PHST- 2023/10/17 20:53 [entrez] PHST- 2023/10/17 00:00 [pmc-release] AID - jitc-2023-007637 [pii] AID - 10.1136/jitc-2023-007637 [doi] PST - ppublish SO - J Immunother Cancer. 2023 Oct;11(10):e007637. doi: 10.1136/jitc-2023-007637.