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Trends Endocrinol Metab. 2014 Oct;25(10):509-17. doi: 10.1016/j.tem.2014.02.006. Epub 2014 Mar 28.

Nutrient control of Drosophila longevity.

Author information

1
Department of Ecology and Evolutionary Biology, Brown University, Providence RI 02912, USA. Electronic address: Marc_Tatar@Brown.edu.
2
Department of Ecology and Evolutionary Biology, Brown University, Providence RI 02912, USA.
3
Neurophysiology Research Group, Korea Research Institute of Bioscience and Biotechnology, Daejon, 305-806, Korea.

Abstract

Dietary restriction (DR) extends the lifespan of many animals, including Drosophila melanogaster. Recent work with flies shows that longevity is controlled by the ratio of consumed protein relative to carbohydrates. Given that reduced insulin and/or insulin-like growth factor (IGF) and target of rapamycin (TOR) signaling increase Drosophila lifespan, these pathways are candidate mediators of DR. However, this idea has ambiguous experimental support. The Nutritional Geometric Framework (NGF), which dissects the impact of nutrient protein relative to carbohydrates, may provide an approach to resolving the roles for these pathways in DR. Nutrient sensing of protein and carbohydrate may occur in the fat body through signals to hypothalamic-like neurons in the fly brain and, thus, control secretion of insulin-like peptides that regulate longevity.

KEYWORDS:

TOR; aging; dietary restriction; geometric framework; insulin/IGF signaling; lifespan extension

PMID:
24685228
PMCID:
PMC4177520
DOI:
10.1016/j.tem.2014.02.006
[Indexed for MEDLINE]
Free PMC Article
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