Telitacicept for PGNMID: A Single-Arm Study

Telitacicept (RC18) is a recombinant TACI-Fc fusion protein that simultaneously neutralizes B-lymphocyte stimulator (BLyS) and a proliferation-inducing ligand (APRIL), thereby inhibiting B-cell differentiation and plasma-cell survival. In this study, it is supplied as a sterile, preservative-free, lyophilized powder (160 mg/vial) that is reconstituted with 1 mL water for injection and administered subcutaneously into the abdomen or thigh at a fixed dose of 160 mg once weekly for 24 weeks. Each injection is performed by trained study personnel, and pre-filled backup syringes are available to ensure exact dosing. No dose escalation or tapering is planned; dose reductions or temporary discontinuation are allowed only for predefined safety criteria.