A Clinical Study Assessing the Subcutaneous Formulation of TQB2934 for Injection in Subjects With Malignant Plasma Cell Tumors

TQB2934 is an anti-CD3(Early T Cell Marker)×BCMA (B cell maturation antigen)double-specific antibody，and the isoform is Native Immunoglobulin G1 ( IgG1), which at one end binds to the CD3 receptor on the surface of T cells ,and the other end binds to BCMA(B cell maturation antigen) to recruit T cells around BCMA-positive cells, which can activate T cells .Active T cells release granzyme and perforin to kill BCMA-positive target cells.