NCIt definition : A fusion protein composed of the extracellular domain of human tumor necrosis factor
receptor superfamily member 13B (TNFRSF13B; transmembrane activator and calcium modulator
and cyclophilin ligand interactor; TACI) fused to a human immunoglobulin (Ig) fragment
crystallizable (Fc) domain, with potential immunomodulating activity. Upon administration,
telitacicept targets both tumor necrosis factor ligand superfamily member 13B (TNFSF13B;
BAFF; B lymphocyte stimulator; BLyS) and tumor necrosis factor ligand superfamily
member 13 (TNFSF13; a proliferation-inducing ligand; APRIL) and inhibits their interaction
with their cell membrane receptors, including TACI, tumor necrosis factor receptor
superfamily member 17 (TNFRSF17; B-cell maturation antigen; BCMA) and tumor necrosis
factor receptor superfamily member 13C (TNFRSF13C; BAFF receptor; BAFF-R). This inhibits
B-cell proliferation and maturation, thereby inhibiting B-cell mediated autoimmune
responses. APRIL and BAFF, and their interactions with their receptors TACI, BCMA
and BAFF-R, play important roles in in B-cell proliferation and survival.;