Methionine restriction extends lifespan of Drosophila melanogaster under conditions of low amino-acid status

Nat Commun. 2014 Apr 7;5:3592. doi: 10.1038/ncomms4592.

Abstract

Reduced methionine (Met) intake can extend lifespan of rodents; however, whether this regimen represents a general strategy for regulating aging has been controversial. Here we report that Met restriction extends lifespan in both fruit flies and yeast, and that this effect requires low amino-acid status. Met restriction in Drosophila mimicks the effect of dietary restriction and is associated with decreased reproduction. However, under conditions of high amino-acid status, Met restriction is ineffective and the trade-off between longevity and reproduction is not observed. Overexpression of InRDN or Tsc2 inhibits lifespan extension by Met restriction, suggesting the role of TOR signalling in the Met control of longevity. Overall, this study defines the specific roles of Met and amino-acid imbalance in aging and suggests that Met restiction is a general strategy for lifespan extension.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Aging / metabolism*
  • Amino Acids / metabolism
  • Animals
  • Caloric Restriction*
  • Cell Cycle Proteins / metabolism
  • Dietary Proteins
  • Drosophila Proteins / metabolism
  • Drosophila melanogaster*
  • Feeding Behavior
  • Female
  • Longevity*
  • Male
  • Methionine / metabolism*
  • Receptor Protein-Tyrosine Kinases / metabolism
  • Reproduction
  • Saccharomyces cerevisiae
  • Signal Transduction
  • TOR Serine-Threonine Kinases / metabolism

Substances

  • Amino Acids
  • Cell Cycle Proteins
  • Dietary Proteins
  • Drosophila Proteins
  • gig protein, Drosophila
  • Methionine
  • target of rapamycin protein, Drosophila
  • TOR Serine-Threonine Kinases
  • InR protein, Drosophila
  • Receptor Protein-Tyrosine Kinases