TNFα-induced miR-130 resulted in adipocyte dysfunction during obesity-related inflammation.

ABSTRACT

Adipocytes are continuously stimulated by proinflammatory cytokines such as TNFα, which cause adipocyte dysfunction by facilitating the inflammatory response. Although miR-130 was reported to be an important regulator of adipogenesis by targeting PPARγ mRNA, little is known about the mechanisms regulating miR-130 expression during the proinflammatory response. Here, we examined miR-130 levels in white adipose tissue (WAT) from high-fat diet (HFD) mice and TNFα-stimulated adipocytes. Primary transcripts of miR-130 were increased after TNFα stimulation, indicating that induction of miR-130 during the pro-inflammatory response is regulated by a transcriptional event. A chromatin immunoprecipitation assay showed that p65 binding to the promoter regions of miR-130 was enhanced after TNFα treatment. Taken together, our findings suggest that induction of miR-130 by TNFα is responsible for adipocyte dysfunction.