CLOVER - CCR5-targeting Leronlimab With Oral Chemotherapy and VEGF-inhibitor Enriched Regimen

This is an open label, randomized, two arm, multi-center study evaluating the efficacy, safety, and tolerability of leronlimab in combination with trifluridine and tipiracil + bevacizumab in participants with MSS, relapsed or refractory, mCRC who have received and progressed, or are intolerant to, at least two prior standard of care treatment regimes, which may have included fluoropyrimidine, oxaliplatin, or irinotecan chemotherapy, an anti-VEGF therapy, and, if RAS wild-type and medically appropriate, an anti-EGFR therapy. Approximately 60 participants, 30 participants in each of two arms evaluating either 350 mg or 700 mg of leronlimab, who are 18 years of age or older, with histologically confirmed metastatic colorectal cancer that is microsatellite stable (MSS). Participants will be randomized 1:1 to each arm, where approximately 30 participants will receive 350 mg of leronlimab + trifluridine and tipiracil + bevacizumab and approximately 30 will receive 700 mg of leronlimab + trifluridine and tipiracil + bevacizumab. Participants who complete 52 weeks of treatment and have complete response (CR), partial response (PR), or stable disease (SD) according to RECIST v1.1, with no documented disease progression since their most recent tumor imaging assessment, may be eligible to enter an Extension Treatment Period and continue treatment for up to an additional 52 weeks. Participants entering the Extension Treatment Period will continue the same dose of leronlimab received during the initial treatment period in combination with trifluridine/tipiracil and bevacizumab. An optional open-label cohort will evaluate leronlimab in combination with pembrolizumab in participants who have documented disease progression during the initial treatment period of the study and meet the applicable eligibility criteria for the cohort. Participants entering this cohort will receive leronlimab 700 mg subcutaneously once weekly in combination with pembrolizumab 200 mg administered intravenously every 3 weeks. Approximately 12 participants may be enrolled in this cohort and may receive treatment for up to 48 weeks.