MicroRNAs in lipid metabolism.

Abstract:

PURPOSE OF REVIEW:Although the role for microRNAs (miRNAs) in regulating multiple physiological processes including apoptosis, cell differentiation, and cancer is well established, the importance of these tiny RNAs in regulating lipid metabolism has only recently been uncovered. This review summarizes the evidence for a critical role of miRNAs in regulating lipid metabolism. RECENT FINDINGS:Lipid metabolism is tightly regulated at the cellular level. In addition to classic transcriptional regulation of cholesterol metabolism (e.g. by SREBP and LXR), members of a class of noncoding RNAs termed miRNAs have now been identified to be potent post-transcriptional regulators of lipid metabolism genes involved in cholesterol homeostasis and fatty acid oxidation. Several reports have recently shown that miR-33 regulates cholesterol efflux and HDL biogenesis by downregulating the expression of the ABC transporters, ABCA1 and ABCG1. In addition, miR-33 also inhibits the translation of several transcripts encoding proteins involved in fatty acid β-oxidation including CPT1a, CROT, and HADHB, thereby reducing fatty acid degradation. Other miRNAs including miR-122, miR-370, miR-335, and miR-378/378*, miR-27 and miR-125a-5p have been implicated in regulating cholesterol homeostasis, fatty acid metabolism and lipogenesis. SUMMARY:Recent advances in the understanding of the regulation of lipid metabolism indicate that miRNAs play major roles in regulating cholesterol and fatty acid metabolism. These new findings may open new avenues for the treatment of dyslipidemias.

journal_name

Curr Opin Lipidol

authors

Fernández-Hernando C,Suárez Y,Rayner KJ,Moore KJ

doi

10.1097/MOL.0b013e3283428d9d

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

86-92

issue

2

eissn

0957-9672

issn

1473-6535

journal_volume

22

pub_type

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