miR-27a is a negative regulator of adipocyte differentiation via suppressing PPARgamma expression.

Abstract:

:microRNAs (miRNAs) are non-coding small RNAs regulating gene expression, cell growth, and differentiation. Although several miRNAs have been implicated in cell growth and differentiation, it is barely understood their roles in adipocyte differentiation. In the present study, we reveal that miR-27a is involved in adipocyte differentiation by binding to the PPARgamma 3'-UTR whose sequence motifs are highly conserved in mammals. During adipogenesis, the expression level of miR-27a was inversely correlated with that of adipogenic marker genes such as PPARgamma and adiponectin. In white adipose tissue, miR-27a was more abundantly expressed in stromal vascular cell fraction than in mature adipocyte fraction. Ectopic expression of miR-27a in 3T3-L1 pre-adipocytes repressed adipocyte differentiation by reducing PPARgamma expression. Interestingly, the level of miR-27a in mature adipocyte fraction of obese mice was down-regulated than that of lean mice. Together, these results suggest that miR-27a would suppress adipocyte differentiation through targeting PPARgamma and thereby down-regulation of miR-27a might be associated with adipose tissue dysregulation in obesity.

authors

Kim SY,Kim AY,Lee HW,Son YH,Lee GY,Lee JW,Lee YS,Kim JB

doi

10.1016/j.bbrc.2010.01.012

subject

Has Abstract

pub_date

2010-02-12 00:00:00

pages

323-8

issue

3

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(10)00034-3

journal_volume

392

pub_type

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