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  • A preparation consisting of autologous T cells that are enriched to be primarily stem memory T cells (Tscm) and are transfected by electroporation with a proprietary transposon-based DNA plasmid vector (PiggyBac) containing an undisclosed selection gene and encoding both an unidentified human-derived safety switch and a chimeric antigen receptor (CAR) based on a proprietary non-immunoglobulin scaffold molecule Centyrin (CARTyrin), which specifically recognizes human B-cell maturation antigen (BCMA; tumor necrosis factor receptor superfamily member 17; TNFRSF17), with potential immunostimulating and antineoplastic activities. Upon administration, autologous anti-BCMA-CAR-expressing Tscm P-BCMA-101 specifically recognize and induce selective toxicity in BCMA-expressing tumor cells. Use of CARTyrin may elicit less immunotoxicity than agents based on antibody-derived single chain variable fragments (scFv), and this agent may exhibit increased persistence and decreased exhaustion for the administered T cells. If significant side effects occur, the safety switch mechanism can induce the rapid attenuation or elimination of P-BCMA-101. BCMA, a tumor-specific antigen and a member of the tumor necrosis factor receptor superfamily (TNFRSF) that binds to both a proliferation-inducing ligand (APRIL; TNFSF13) and B-cell activating factor (BAFF; TNFSF13B), plays a key role in plasma cell survival. BCMA is found on the surfaces of plasma cells and is overexpressed on malignant plasma cells. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C142864\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C142864\' NCI Thesaurus)
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