Abstract
Envafolimab is the first and only globally approved subcutaneously injectable PD-L1 antibody. This open-label, multicenter Phase 1 trial assessed the safety, tolerability, pharmacokinetic (PK) profile, and efficacy of envafolimab as a single agent in Japanese patients with advanced solid tumors. In the dose-escalation phase, 10 patients received subcutaneous (SC) envafolimab QW at 1.0 mg/kg, 2.5 mg/kg and 5.0 mg/kg. In the dose-expansion phase, 16 patients were treated at 2.5 or 5.0 mg/kg Q2W in part-1 and 9 patients received SC envafolimab 300 mg Q4W in part-2. No dose-limiting toxicities (DLTs) were reported. Envafolimab was well tolerated and no new safety signals were identified compared with other marketed products of the same class. Three patients reported Grade ≥ 3 envafolimab-related treatment-emergent adverse events (TEAE), including adrenal insufficiency, cerebral infarction, and immune-mediated enterocolitis. Envafolimab demonstrated dose-proportional increases in area under the time-concentration curve (AUC) and maximum serum concentration (Cmax). The overall response rate (ORR) was 11.4% (n = 4) and disease control rate (DCR) was 34.3% (n = 12). Consistent with that observed in other envafolimab Phase 1 trials and approved PD-1/PD-L1 inhibitors, the safety profile of SC envafolimab in Japanese patients with advanced solid tumors was well tolerated with efficacy comparable to IV administered treatments. Pharmacokinetics data and preliminary anti-tumor response support dose regimens with longer dosing intervals (Q2W or Q4W). As such, envafolimab offers patients a more convenient treatment option than currently available intravenously administered PD-1/PD-L1 inhibitors.
ClinicalTrials.gov identifier
NCT03248843(August 14, 2017).
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Acknowledgements
We thank the participating patients, their family members, and all researchers involved in this study.
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This study was funded by 3D Medicines Co., Ltd, China.
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Dr. Toshio Shimizu (TS) received research grants from 3D Medicine related to the submitted work; and research grants from Novartis, Eli Lilly, Loxo Oncology, Daiichi-Sankyo, AbbVie, Bristol-Myers Squibb, Eisai, AstraZeneca, Pfizer, Takeda Oncology, Incyte, Chordia Therapeutics, Symbio Pharmaceuticals, PharmaMar, Astellas; and advisory role fees from AbbVie, Daiichi-Sankyo, Takeda Oncology, Chordia Therapeutics; and personal fees (speakers) from Eli Lilly, Chugai Pharmaceutical Co., Taiho, Boehringer Ingelheim, MSD outside the submitted work. Dr. Noboru Yamamoto (NY) received research grants from Astellas, AstraZeneca, Chugai, Eisai, Taiho, BMS, Pfizer, Novartis, Eli Lilly, AbbVie, Daiichi-Sankyo, Bayer, Boehringer Ingelheim, Kyowa-Hakko Kirin, Takeda, ONO, Janssen Pharma, MSD, MERCK, GSK, Sumitomo Dainippon, Chiome Bioscience, Otsuka, Carna Biosciences, Genmab, Shionogi; and advisory role fees from Eisai, Takeda, Otsuka, Boehringer Ingelheim, Cimic, Chugai; and personal fees (speakers) from AstraZeneca, Eli Lilly, ONO, Chugai, Sysmex, Daiichi-Sankyo, Eisai outside the submitted work. Dr. Kan Yonemori (KY) received research grants from MSD, Daiichi-Sankyo, Astrazeneca, Taiho, Pfizer, Novartis, Takeda, Chugai, Ono, Sanofi, Seattle genetics, Eisai, Eli Lilly, Genmab, Boeringer Ingelheim, Kyowa Hakko Kirin, Nihon Kayaku, Haihe; and advisory role fees from Novartis, Eisai, AstraZeneca, Chugai, Takeda, Genmab, OncXerna; and personal fees from Pfizer, Eisai, AstraZeneca, Eli Lilly, Takeda, Chugai, Fuji Film Pharma outside the submitted work. Dr. Shunsuke Kondo (SK) received research grants from Takeda, AstraZeneca, Abbie, Eli Lilly, MSD, Boehringer Ingelheim, Chugai, Eisai, Incyte, Pfizer; and personal fees from Chugai, Incyte, Takeda, Chugai, Termo, and Eisai outside the submitted work. Dr. Takafumi Koyama (TK) received research grants from Novartis, Daiichi-Sankyo, Eli Lilly, PACT Pharma; and personal fees from Chugai and Sysmex outside the submitted work. Dr. NAKAJIMA reports grants and personal fees from Sumitomo Dainippon Pharma Co., personal fees from Boehringer Ingelheim , personal fees from Bristol-Myers Squibb, grants and personal fees from Ono Pharmaceutical Co., grants and personal fees from Taiho Pharmaceutical Co., personal fees from Amgen, grants and personal fees from Takeda Pharmaceutical Co., grants and personal fees from Chugai Pharmaceutical Co., grants and personal fees from Sanofi K.K., personal fees from Novartis Japan, grants and personal fees from Nippon Kayaku Co., grants and personal fees from MSD K.K., grants and personal fees from Eli Lilly Japan K.K., personal fees from Bayer Yakuhin, personal fees from Pfizer Japan Inc., personal fees from Daiichi Sankyo Co., personal fees from Yakult Honsha Co., personal fees from Nipro Co, personal fees from Merck Serono Co., grants from PAREXEL, grants from JCRO, grants from SHIONOGI & CO., LTD., personal fees from AstraZeneca, personal fees from IQVIA, personal fees from GlaxoSmithKline, outside the submitted work; Yu Sunakawa; Research funding and honoraria from Chugai Pharmaceutical, Taiho Pharmaceutical, Takeda, Eli Lilly Japan, and Sanofi Honoraria from Bristol-Myers Squibb Japan, Merck Biopharma, Ono Pharmaceutical, Bayer Yakuhin, MSD, Daiichi Sankyo, Sysmex and Guardant Health Naoki Izawa: Honoraria from Taiho Pharmaceutical, Takeda, Eli Lilly Japan, and Bristol-Myers Squibb Japan Yoshiki Horie: No. COI Silong Xiang, Siying Xu, Lan Qin, John Gong, and David Liu are employees of and own stock in 3D Medicines Co., Ltd. JG and DL have leadership roles at 3D Medicines Co., Ltd.
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Shimizu, T., Nakajima, T.E., Yamamoto, N. et al. Phase I study of envafolimab (KN035), a novel subcutaneous single-domain anti-PD-L1 monoclonal antibody, in Japanese patients with advanced solid tumors. Invest New Drugs 40, 1021–1031 (2022). https://doi.org/10.1007/s10637-022-01287-7
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DOI: https://doi.org/10.1007/s10637-022-01287-7