Unknown

Dataset Information

0

Deficiency in mTORC1-controlled C/EBP?-mRNA translation improves metabolic health in mice.


ABSTRACT: The mammalian target of rapamycin complex 1 (mTORC1) is a central regulator of physiological adaptations in response to changes in nutrient supply. Major downstream targets of mTORC1 signalling are the mRNA translation regulators p70 ribosomal protein S6 kinase 1 (S6K1p70) and the 4E-binding proteins (4E-BPs). However, little is known about vertebrate mRNAs that are specifically controlled by mTORC1 signalling and are engaged in regulating mTORC1-associated physiology. Here, we show that translation of the CCAAT/enhancer binding protein beta (C/EBP?) mRNA into the C/EBP?-LIP isoform is suppressed in response to mTORC1 inhibition either through pharmacological treatment or through calorie restriction. Our data indicate that the function of 4E-BPs is required for suppression of LIP. Intriguingly, mice lacking the cis-regulatory upstream open reading frame (uORF) in the C/EBP?-mRNA, which is required for mTORC1-stimulated translation into C/EBP?-LIP, display an improved metabolic phenotype with features also found under calorie restriction. Thus, our data suggest that translational adjustment of C/EBP?-isoform expression is one of the key processes that direct metabolic adaptation in response to changes in mTORC1 activity.

SUBMITTER: Zidek LM 

PROVIDER: S-EPMC4552494 | biostudies-literature | 2015 Aug

REPOSITORIES: biostudies-literature

altmetric image

Publications


The mammalian target of rapamycin complex 1 (mTORC1) is a central regulator of physiological adaptations in response to changes in nutrient supply. Major downstream targets of mTORC1 signalling are the mRNA translation regulators p70 ribosomal protein S6 kinase 1 (S6K1p70) and the 4E-binding proteins (4E-BPs). However, little is known about vertebrate mRNAs that are specifically controlled by mTORC1 signalling and are engaged in regulating mTORC1-associated physiology. Here, we show that transla  ...[more]

Similar Datasets

| S-EPMC5956241 | biostudies-literature
| S-EPMC3347774 | biostudies-literature
| S-EPMC5790126 | biostudies-literature
| S-EPMC6612659 | biostudies-literature
| S-EPMC8034618 | biostudies-literature
2011-08-24 | GSE27213 | GEO
| S-EPMC10878035 | biostudies-literature
2013-07-31 | E-GEOD-40936 | biostudies-arrayexpress
| S-EPMC4872075 | biostudies-literature
| S-EPMC2994037 | biostudies-literature