The lupus-related Lmb3 locus contains a disease-suppressing Coronin-1A gene mutation.

ABSTRACT: Here, we show that a lupus-suppressing locus is caused by a nonsense mutation of the filamentous actin-inhibiting Coronin-1A gene. This mutation was associated with developmental and functional alterations in T cells including reduced migration, survival, activation, and Ca2+ flux. T-dependent humoral responses were impaired, but no intrinsic B cell defects were detected. By transfer of T cells, it was shown that suppression of autoimmunity could be accounted for by the presence of the Coro1a(Lmb3) mutation in T cells. Our results demonstrate that Coronin-1A is required for the development of systemic lupus and identify actin-cytoskeleton regulatory proteins as potential targets for modulating autoimmune diseases.

SUBMITTER: Haraldsson MK 

PROVIDER: S-EPMC2274909 | biostudies-literature | 2008 Jan

REPOSITORIES: biostudies-literature