A First-in-human Study of the Safety, Pharmacokinetics, Pharmacodynamics and Anti-tumor Activity of SAR439459 Monotherapy and Combination of SAR439459 and Cemiplimab in Patients With Advanced Solid Tumors

The duration of the study for an individual patient will start from the signature of the main informed consent and include a screening period of up to 4 weeks (28 days), a treatment period of at least 1 or 2 cycles (21 or 14 days per cycle, respectively), an end-of-treatment visit at least 30 days following the last administration of study drug (or until the patient receives another anticancer therapy, whichever is earlier), and a follow-up visit 3 months after treatment discontinuation and every 3 months following, until disease progression, or initiation of another antitumor treatment, or death, whichever is earlier. For the urothelial cancer cohort in Part 2B, follow-up visits will occur every 3 months until death, study cut-off date, or upon cancellation of Survival follow-up at the discretion of the Sponsor at any prior timepoint. For the overall survival analysis (approximately 12 months after last patient first dose), whichever comes first. Patients who have no disease progression, and continue to benefit from the study drug(s), will be allowed to continue treatment beyond the common study end-date at their assigned dose unless the study is terminated by the Sponsor. The expected enrollment period is approximately 42 months.