RGS12 Is a Novel Critical NF-κB Activator in Inflammatory Arthritis

IScience
Gongsheng YuanS Yang

Abstract

Rheumatoid arthritis (RA) is the most common inflammatory disease, which currently lacks effective treatment. Here, we discovered that the Regulator of G Protein Signaling 12 (RGS12) plays a key role in regulating inflammation. Transcriptional and protein analysis revealed that RGS12 was upregulated in human and mouse RA macrophages. Deletion of RGS12 in myeloid lineage or globally inhibits the development of collagen-induced arthritis including joint swelling and bone destruction. Mechanistically, RGS12 associates with NF-κB(p65) to activate its phosphorylation and nuclear translocation through PTB domain, and NF-κB(p65) regulates RGS12 expression in a transcriptional manner. The nuclear translocation ability of NF-κB(p65) and RGS12 can both be enhanced by cyclooxygenase-2 (COX2). Furthermore, ablation of RGS12 via RNA interference significantly blocks the inflammatory process in vivo and in vitro. These results demonstrate that RGS12 plays a critical role in the pathogenesis of inflammatory arthritis.

Datasets Mentioned

BETA
GSE49604

Methods Mentioned

BETA
GTPases
PCR
ELISA
nuclear translocation
co-immunoprecipitation
Nuclear
transfection
pulls down
immunoprecipitation
ChIP

Software Mentioned

ImageJ
NIH ImageJ
GoLoco

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