Article
作者: Ben-Neriah, Susana ; Li, Michael Y ; Bristow, Brianna N ; Shah, Sohrab P ; Mostafavi, Sara ; Hother, Christoffer ; Molday, Laurie L ; Ennishi, Daisuke ; Wong, Mark ; Villa, Diego ; Weng, Andrew P ; Mungall, Andrew J ; Staudt, Louis M ; Lai, Daniel ; Morin, Ryan D ; Chan, Fong Chun ; Farinha, Pedro ; Baticados, Abigail ; Huang, Da Wei ; Chong, Lauren ; Zhang, Allen W ; Steidl, Christian ; Molday, Robert S ; Kridel, Robert ; Mottok, Anja ; Viller, Natasja N ; Boyle, Merrill ; Viganò, Elena ; Takata, Katsuyoshi ; Wretham, Nicole ; Abraham, Libin ; Gascoyne, Randy D ; Saberi, Saeed ; Bally, Marcel B ; Gerrie, Alina S ; Telenius, Adele ; Meissner, Barbara ; Dos Santos, Nancy ; Shulha, Hennady P ; Aoki, Tomohiro ; Gold, Michael ; Marra, Marco A ; Scott, David W ; Connors, Joseph M ; Chiu, Derek S ; Bashashati, Ali ; Savage, Kerry J ; Madero, Angel ; Healy, Shannon ; Cohen Freue, Gabriela V ; Rushton, Christopher ; Salehi, Sohrab ; Duns, Gerben ; Slack, Graham W ; Sehn, Laurie H ; Woolcock, Bruce W ; Uger, Robert A
Transmembrane protein 30A (TMEM30A) maintains the asymmetric distribution of phosphatidylserine, an integral component of the cell membrane and 'eat-me' signal recognized by macrophages. Integrative genomic and transcriptomic analysis of diffuse large B-cell lymphoma (DLBCL) from the British Columbia population-based registry uncovered recurrent biallelic TMEM30A loss-of-function mutations, which were associated with a favorable outcome and uniquely observed in DLBCL. Using TMEM30A-knockout systems, increased accumulation of chemotherapy drugs was observed in TMEM30A-knockout cell lines and TMEM30A-mutated primary cells, explaining the improved treatment outcome. Furthermore, we found increased tumor-associated macrophages and an enhanced effect of anti-CD47 blockade limiting tumor growth in TMEM30A-knockout models. By contrast, we show that TMEM30A loss-of-function increases B-cell signaling following antigen stimulation-a mechanism conferring selective advantage during B-cell lymphoma development. Our data highlight a multifaceted role for TMEM30A in B-cell lymphomagenesis, and characterize intrinsic and extrinsic vulnerabilities of cancer cells that can be therapeutically exploited.