Abstract:
:Autoreactive B cells have critical roles in a large diversity of autoimmune diseases, but the molecular pathways that control these cells remain poorly understood. We performed an in vivo functional screen of a lymphocyte-expressed microRNA library and identified miR-148a as a potent regulator of B cell tolerance. Elevated miR-148a expression impaired B cell tolerance by promoting the survival of immature B cells after engagement of the B cell antigen receptor by suppressing the expression of the autoimmune suppressor Gadd45α, the tumor suppressor PTEN and the pro-apoptotic protein Bim. Furthermore, increased expression of miR-148a, which occurs frequently in patients with lupus and lupus-prone mice, facilitated the development of lethal autoimmune disease in a mouse model of lupus. Our studies demonstrate a function for miR-148a as a regulator of B cell tolerance and autoimmunity.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Gonzalez-Martin A,Adams BD,Lai M,Shepherd J,Salvador-Bernaldez M,Salvador JM,Lu J,Nemazee D,Xiao Cdoi
10.1038/ni.3385subject
Has Abstractpub_date
2016-04-01 00:00:00pages
433-40issue
4eissn
1529-2908issn
1529-2916pii
ni.3385journal_volume
17pub_type
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