Fasting activates the gene expression of UCP3 independent of genes necessary for lipid transport and oxidation in skeletal muscle.

Abstract:

:Fasting triggers a complex array of adaptive metabolic and hormonal responses including an augmentation in the capacity for mitochondrial fatty acid (FA) oxidation in skeletal muscle. This study hypothesized that this adaptive response is mediated by increased mRNA of key genes central to the regulation of fat oxidation in human skeletal muscle. Fasting dramatically increased UCP3 gene expression, by 5-fold at 15 h and 10-fold at 40 h. However the expression of key genes responsible for the uptake, transport, oxidation, and re-esterification of FA remained unchanged following 15 and 40 h of fasting. Likewise there was no change in the mRNA abundance of transcription factors. This suggests a unique role for UCP3 in the regulation of FA homeostasis during fasting as adaptation to 40 h of fasting does not require alterations in the expression of other genes necessary for lipid metabolism.

authors

Tunstall RJ,Mehan KA,Hargreaves M,Spriet LL,Cameron-Smith D

doi

10.1016/S0006-291X(02)00473-4

subject

Has Abstract

pub_date

2002-06-07 00:00:00

pages

301-8

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(02)00473-4

journal_volume

294

pub_type

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