학술논문
MiR-93 Controls Adiposity via Inhibition of Sirt7 and Tbx3
Document Type
article
Author
Michele Cioffi; Mireia Vallespinos-Serrano; Sara M. Trabulo; Pablo Jose Fernandez-Marcos; Ashley N. Firment; Berta N. Vazquez; Catarina R. Vieira; Francesca Mulero; Juan A. Camara; Ultan P. Cronin; Manuel Perez; Joaquim Soriano; Beatriz G. Galvez; Alvaro Castells-Garcia; Verena Haage; Deepak Raj; Diego Megias; Stephan Hahn; Lourdes Serrano; Anne Moon; Alexandra Aicher; Christopher Heeschen
Source
Cell Reports, Vol 12, Iss 10, Pp 1594-1605 (2015)
Subject
Language
English
ISSN
2211-1247
Abstract
Conquering obesity has become a major socioeconomic challenge. Here, we show that reduced expression of the miR-25-93-106b cluster, or miR-93 alone, increases fat mass and, subsequently, insulin resistance. Mechanistically, we discovered an intricate interplay between enhanced adipocyte precursor turnover and increased adipogenesis. First, miR-93 controls Tbx3, thereby limiting self-renewal in early adipocyte precursors. Second, miR-93 inhibits the metabolic target Sirt7, which we identified as a major driver of in vivo adipogenesis via induction of differentiation and maturation of early adipocyte precursors. Using mouse parabiosis, obesity in mir-25-93-106b–/– mice could be rescued by restoring levels of circulating miRNA and subsequent inhibition of Tbx3 and Sirt7. Downregulation of miR-93 also occurred in obese ob/ob mice, and this phenocopy of mir-25-93-106b–/– was partially reversible with injection of miR-93 mimics. Our data establish miR-93 as a negative regulator of adipogenesis and a potential therapeutic option for obesity and the metabolic syndrome.