Article
作者: Bessot, Boris ; Pegoraro, Francesco ; Aguilar, Yurena ; Khan, Taushif ; Bohlen, Jonathan ; Russell, Amanda J ; Della Mina, Erika ; Puel, Anne ; Catala, Albert ; Veltroni, Marinella ; Goulvestre, Claire ; Parvaneh, Nima ; Peel, Jessica ; Rao, Geetha ; Delabesse, Eric ; Soudée, Camille ; Goodnow, Christopher C ; Turville, Stuart ; Ogishi, Masato ; Bustamante, Jacinta ; Masson, Cécile ; Rosain, Jérémie ; Zhang, Peng ; Vatovec, Taja ; Landegren, Nils ; Neehus, Anna-Lena ; Buetow, Lori ; Philippot, Quentin ; Bull, Rowena ; Largeaud, Laetitia ; Zhang, Allison ; Aiuti, Alessandro ; Haerynck, Filomeen ; André, Isabelle ; Cheynier, Remi ; Bagarić, Ivan ; Casanova, Jean-Laurent ; Elliott, Michael ; Sewell, William A ; Brillot, Fabienne ; Le Voyer, Tom ; Sobrino, Steicy ; Saettini, Francesco ; Alsina, Laia ; Pasquet, Marlène ; Dutrieux, Jacques ; Sankaran, Vijay G ; Muratore, Edoardo ; Arango-Franco, Carlos A ; Consonni, Filippo ; Villalpando, Emily ; Avery, Danielle T ; Ma, Cindy S ; Marr, Nico ; Al-Rifai, Dena ; Michelet, Marine ; Ahmed, Syed F ; Erlacher, Miriam ; Leardini, Davide ; Vendemini, Francesca ; Gambineri, Eleonora ; Li, Hailun ; Cederholm, Axel ; Lagresle-Peyrou, Chantal ; Barzaghi, Federica ; Berteloot, Laureline ; Bole-Feysot, Christine ; Baccelli, Francesco ; Pandiarajan, Vignesh ; de Muylder, Benedicte ; Erazo, Lucia ; Béziat, Vivien ; Jackson, Katherine J L ; Huang, Danny T ; Wahlster, Lara ; Seeleuthner, Yoann ; Masetti, Riccardo ; Roullion, Cecile ; Janda, Zarah ; Abel, Laurent ; Joubran, Samantha ; Shahrooei, Mohammad ; Tangye, Stuart G ; Six, Emmanuelle ; Conti, Francesca ; Ye, Tianyi
Abstract:
The E3 ubiquitin ligase Casitas B-lineage lymphoma (CBL) promotes positive selection and antigen responses in mouse T lymphocytes by ubiquitinating ZAP70. Conversely, mouse CBL and CBL-B mutually redundantly regulate SYK ubiquitination and B cell receptor signaling. Here we studied individuals with somatically homozygous
CBL
loss-of-function variants in leukocytes. Human CBL is largely redundant for the development and function of human T cells. Conversely, B cell development is altered at the immature stage, with a tenfold increase in transitional cells, enhanced survival of autoreactive clones and impaired tolerance manifested by autoantibody production. B cell maturation is intrinsically impaired by reduced apoptosis and dysregulated B cell receptor signaling. CBL deficiency impairs humoral immunity by limiting memory B cell formation and reducing class switching and somatic hypermutation. Consequently, antigen-specific B cell generation and adaptive immune memory are disrupted, predisposing individuals to infection. Human CBL is critical for B cell development and function but redundant for T cell biology.