Serplulimab: First Approval.

Serplulimab () is an intravenously administered anti-PD-1 antibody being developed by Shanghai Henlius Biotech, Inc. for the treatment of solid tumours. Anti-PD-1 immunotherapies, such as serplulimab, can stimulate immune responses by relieving PD-1-related immunosuppression. Serplulimab received its first approval on 25 Mar 2022 in China for the treatment of adult patients with advanced unresectable or metastatic microsatellite instability-high (MSI-H) solid tumours that have failed to respond to previous standard treatments. This article summarizes the milestones in the development of serplulimab leading to this first approval in the treatment of MSI-H solid tumours in adults.