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Aging Cell. 2013 Aug;12(4):645-51. doi: 10.1111/acel.12088. Epub 2013 Jun 5.

Calorie restriction in humans inhibits the PI3K/AKT pathway and induces a younger transcription profile.

Author information

1
Laboratory of Experimental Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA.

Abstract

Caloric restriction (CR) and down-regulation of the insulin/IGF pathway are the most robust interventions known to increase longevity in lower organisms. However, little is known about the molecular adaptations induced by CR in humans. Here, we report that long-term CR in humans inhibits the IGF-1/insulin pathway in skeletal muscle, a key metabolic tissue. We also demonstrate that CR induces dramatic changes of the skeletal muscle transcriptional profile that resemble those of younger individuals. Finally, in both rats and humans, CR evoked similar responses in the transcriptional profiles of skeletal muscle. This common signature consisted of three key pathways typically associated with longevity: IGF-1/insulin signaling, mitochondrial biogenesis, and inflammation. Furthermore, our data identify promising pathways for therapeutic targets to combat age-related diseases and promote health in humans.

KEYWORDS:

caloric restriction; human; insulin/IGF-1 signaling; skeletal muscle

PMID:
23601134
PMCID:
PMC3714316
DOI:
10.1111/acel.12088
[Indexed for MEDLINE]
Free PMC Article
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