期刊
TRENDS IN ENDOCRINOLOGY AND METABOLISM
卷 25, 期 10, 页码 509-517出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tem.2014.02.006
关键词
dietary restriction; aging; geometric framework; lifespan extension; insulin/IGF signaling; TOR
资金
- NIH/NIA [R37AG024360, R01AG031152]
- NIH/NIA training grant [T32 AG041688]
- KRIBB Research Initiative Program
- National Research Council of Science & Technology (NST), Republic of Korea [KCM3031413] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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