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ω-6 Polyunsaturated fatty acids extend life span through the activation of autophagy

O'Rourke, Eyleen J., Kuballa, Petric, Xavier, Ramnik, Ruvkun, Gary·2013·Genes & Development
DOI 10.1101/gad.205294.112
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Abstract

Adaptation to nutrient scarcity depends on the activation of metabolic programs to efficiently use internal reserves of energy. Activation of these programs in abundant food regimens can extend life span. However, the common molecular and metabolic changes that promote adaptation to nutritional stress and extend life span are mostly unknown. Here we present a response to fasting, enrichment of ω-6 polyunsaturated fatty acids (PUFAs), which promotes starvation resistance and extends Caenorhabditis elegans life span. Upon fasting, C. elegans induces the expression of a lipase, which in turn leads to an enrichment of ω-6 PUFAs. Supplementing C. elegans culture media with these ω-6 PUFAs increases their resistance to starvation and extends their life span in conditions of food abundance. Supplementation of C. elegans or human epithelial cells with these ω-6 PUFAs activates autophagy, a cell recycling mechanism that promotes starvation survival and slows aging. Inactivation of C. elegans autophagy components reverses the increase in life span conferred by supplementing the C. elegans diet with these fasting-enriched ω-6 PUFAs. We propose that the salubrious effects of dietary supplementation with ω-3/6 PUFAs (fish oils) that have emerged from epidemiological studies in humans may be due to a similar activation of autophagic programs.

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  • Dietary supplementation with ω-6 polyunsaturated fatty acids extends lifespan in nematodes through autophagy activation.

    “Dietary supplementation with ω-6 polyunsaturated fatty acids also extends lifespan in nematodes through autophagy activation (O’Rourke et al., 2013).”

    From The Hallmarks of Aging (2013) · cites this paper as O’Rourke et al., 2013

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Metadata

Authors
O'Rourke, E. J., Kuballa, P., Xavier, R., & Ruvkun, G.
Venue
Genes & Development
Publisher
Cold Spring Harbor Laboratory
Published
2013-02-07
Volume
27
Issue
4
Pages
429-440
ISSN
  • 0890-9369
  • 1549-5477
DOI
10.1101/gad.205294.112
Cited by
185
References
9
Language
en

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