KSRP ablation enhances brown fat gene program in white adipose tissue through reduced miR-150 expression

Chu Fang Chou, Yi Yu Lin, Hsu Kun Wang, Xiaolin Zhu, Matteo Giovarelli, Paola Briata, Roberto Gherzi, W. Timothy Garvey, Ching Yi Chen

Research output: Contribution to journalArticle

Abstract

Brown adipose tissue oxidizes chemical energy for heat generation and energy expenditure. Promoting brownlike transformation in white adipose tissue (WAT) is a promising strategy for combating obesity. Here, we find that targeted deletion of KH-type splicing regulatory protein (KSRP), an RNA-binding protein that regulates gene expression at multiple levels, causes a reduction in body adiposity. The expression of brown fat-selective genes is increased in subcutaneous/inguinal WAT (iWAT) of Ksrp-/- mice because of the elevated expression of PR domain containing 16 and peroxisome proliferator- activated receptor gamma coactivator 1a, which are key regulators promoting the brown fat gene program. The expression of microRNA (miR)-150 in iWAT is decreased due to impaired primary miR-150 processing in the absence of KSRP. We show that miR-150 directly targets and represses Prdm16 and Ppargc1a, and that forced expression of miR-150 attenuates the elevated expression of brown fat genes caused by KSRP deletion. This study reveals the in vivo function of KSRP in controlling brown-like transformation of iWAT through posttranscriptional regulation of miR-150 expression.

Original languageEnglish
Pages (from-to)2949-2961
Number of pages13
JournalDiabetes
Volume63
Issue number9
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism

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