The cytoskeletal regulator HEM1 governs B cell development and prevents autoimmunity.
Sci Immunol
; 5(49)2020 07 10.
Article
en En
| MEDLINE
| ID: mdl-32646852
ABSTRACT
The WAVE regulatory complex (WRC) is crucial for assembly of the peripheral branched actin network constituting one of the main drivers of eukaryotic cell migration. Here, we uncover an essential role of the hematopoietic-specific WRC component HEM1 for immune cell development. Germline-encoded HEM1 deficiency underlies an inborn error of immunity with systemic autoimmunity, at cellular level marked by WRC destabilization, reduced filamentous actin, and failure to assemble lamellipodia. Hem1-/- mice display systemic autoimmunity, phenocopying the human disease. In the absence of Hem1, B cells become deprived of extracellular stimuli necessary to maintain the strength of B cell receptor signaling at a level permissive for survival of non-autoreactive B cells. This shifts the balance of B cell fate choices toward autoreactive B cells and thus autoimmunity.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Enfermedades Autoinmunes
/
Linfocitos B
/
Autoinmunidad
/
Proteínas de la Membrana
Límite:
Animals
/
Child
/
Female
/
Humans
/
Infant
Idioma:
En
Revista:
Sci Immunol
Año:
2020
Tipo del documento:
Article
País de afiliación:
Austria