Autocrine and paracrine modulation of microRNA-155 expression by globular adiponectin in RAW 264.7 macrophages: Involvement of MAPK/NF-κB pathway

• Adiponectin induces microRNA-155 expression in RAW 264.7 macrophages.
• Adiponectin increases miR-155 expression through MAPK/NF-κB pathway.
• Induction of miR-155 is regulated via autocrine and paracrine manner.

Adiponectin, a hormone produced from adipose tissue, regulates various biological responses, including inflammation and many metabolic processes. MicroRNAs control expression of diverse target genes and various physiological responses. Many of these responses are commonly regulated by adiponectin. However, effects of adiponectin on microRNAs regulation are largely unknown. Herein we demonstrated that globular adiponectin induces increase in miR-155 expression, which plays an important role in inflammatory response, in RAW 264.7 macrophages. We further showed that this effect was modulated by and MANK/NF-κB dependent mechanisms. These results suggest that miR-155 would be a novel promising target mediating adiponectin-induced various biological responses.

Figure optionsDownload as PowerPoint slide