B-cell maturation antigen (BCMA or BCM), also known as tumor necrosis factor receptor superfamily member 17 (TNFRSF17), is a protein that in humans is encoded by the TNFRSF17 gene.
The protein encoded by this gene is a member of the TNF-receptor superfamily. This receptor is preferentially expressed in mature B lymphocytes, and may be important for B cell development and autoimmune response. This receptor has been shown to specifically bind to the tumor necrosis factor (ligand) superfamily, member 13b (TNFSF13B/TALL-1/BAFF), and to lead to NF-kappaB and MAPK8/JNK activation. This receptor also binds to various TRAF family members, and thus may transduce signals for cell survival and proliferation.[7]
Interactions
TNFRSF17 has been shown to interact with the B-cell activating factor TNFSF13B.[8][9] A conserved domain at the N-terminus, BCMA TALL-1 binding domain, is required for binding to the TNFSF13B.[8]
An antibody-drug conjugateGSK2857916 (belantamab mafodotin) demonstrated activity in patients with relapsed/refractory multiple myeloma, previously treated with an immunomodulatory drug, proteosome inhibitor, or who were intolerant/refractory to an anti-CD38 monoclonal antibody. The primary toxicities were keratopathy, thrombocytopenia, and anemia.[13]
A Phase 1b/2 study of CAR-T cell therapy directed against BCMA in myeloma patients refractory to a proteasome inhibitor or immunomodulatory drug, and who had received an anti-CD38 antibody showed a 91% overall response rate. Main toxicities were cytokine release syndrome and cytopenias.[16]
^Lonial S, Lee HC, Badros A, Trudel S, Nooka AK, Chari A, et al. (February 2020). "Belantamab mafodotin for relapsed or refractory multiple myeloma (DREAMM-2): a two-arm, randomised, open-label, phase 2 study". The Lancet. Oncology. 21 (2): 207–221. doi:10.1016/s1470-2045(19)30788-0. PMID31859245.
Treml LS, Crowley JE, Cancro MP (October 2006). "BLyS receptor signatures resolve homeostatically independent compartments among naïve and antigen-experienced B cells". Seminars in Immunology. 18 (5): 297–304. doi:10.1016/j.smim.2006.07.001. PMID16919470.
Mackay F, Leung H (October 2006). "The role of the BAFF/APRIL system on T cell function". Seminars in Immunology. 18 (5): 284–9. doi:10.1016/j.smim.2006.04.005. PMID16931039.
Gras MP, Laâbi Y, Linares-Cruz G, Blondel MO, Rigaut JP, Brouet JC, et al. (July 1995). "BCMAp: an integral membrane protein in the Golgi apparatus of human mature B lymphocytes". International Immunology. 7 (7): 1093–106. doi:10.1093/intimm/7.7.1093. PMID8527407.
Loftus BJ, Kim UJ, Sneddon VP, Kalush F, Brandon R, Fuhrmann J, et al. (September 1999). "Genome duplications and other features in 12 Mb of DNA sequence from human chromosome 16p and 16q". Genomics. 60 (3): 295–308. doi:10.1006/geno.1999.5927. PMID10493829.
Gross JA, Johnston J, Mudri S, Enselman R, Dillon SR, Madden K, et al. (April 2000). "TACI and BCMA are receptors for a TNF homologue implicated in B-cell autoimmune disease". Nature. 404 (6781): 995–9. Bibcode:2000Natur.404..995G. doi:10.1038/35010115. PMID10801128. S2CID4323357.
Yu G, Boone T, Delaney J, Hawkins N, Kelley M, Ramakrishnan M, et al. (September 2000). "APRIL and TALL-I and receptors BCMA and TACI: system for regulating humoral immunity". Nature Immunology. 1 (3): 252–6. doi:10.1038/79802. PMID10973284. S2CID6799584.
Smirnova AS, Andrade-Oliveira V, Gerbase-DeLima M (February 2008). "Identification of new splice variants of the genes BAFF and BCMA". Molecular Immunology. 45 (4): 1179–83. doi:10.1016/j.molimm.2007.07.028. PMID17825416.