KSRP ablation enhances brown fat gene program in white adipose tissue through reduced miR-150 expression.
Diabetes
; 63(9): 2949-61, 2014 Sep.
Article
in En
| MEDLINE
| ID: mdl-24722250
ABSTRACT
Brown adipose tissue oxidizes chemical energy for heat generation and energy expenditure. Promoting brown-like 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 1α, 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 post-transcriptional regulation of miR-150 expression.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Adipose Tissue, Brown
/
Trans-Activators
/
MicroRNAs
/
Adipose Tissue, White
Limits:
Animals
Language:
En
Journal:
Diabetes
Year:
2014
Document type:
Article
Affiliation country:
Albania