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Metabotropic GABA signalling modulates longevity in C. elegans.

Lei Chun1,2, Jianke Gong1,2, Fengling Yuan1

  • 1College of Life Science and Technology, Collaborative Innovation Center for Brain Science, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.

Nature Communications
|November 6, 2015
PubMed
Summary
This summary is machine-generated.

GABA signaling, a key neurotransmitter pathway, was found to extend lifespan in C. elegans. This longevity effect is mediated by the GABAB receptor GBB-1 and influences the DAF-16/FOXO pathway.

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Area of Science:

  • Neuroscience
  • Genetics
  • Aging Research

Background:

  • The nervous system's role in aging is not fully understood.
  • Gamma-aminobutyric acid (GABA) is a major inhibitory neurotransmitter regulating nervous system function.
  • The impact of GABA signaling on aging remains unexplored.

Purpose of the Study:

  • To investigate the role of GABA signaling in lifespan regulation.
  • To identify the specific GABA receptors involved in aging processes.
  • To elucidate the molecular pathways linking GABA signaling to longevity.

Main Methods:

  • Screening of neurotransmitter-deficient mutants in C. elegans.
  • Lifespan assays to assess the effects of GABA signaling.
  • Genetic analysis to identify involved receptors and signaling pathways (e.g., GBB-1, G protein-PLCβ, DAF-16/FOXO).
  • Functional substitution experiments using mammalian GABAB receptors.

Main Results:

  • Deficiency in GABA signaling significantly extends lifespan in C. elegans.
  • The pro-longevity effect is mediated by the metabotropic GABAB receptor GBB-1, not ionotropic GABAA receptors.
  • GBB-1 regulates lifespan via G protein-PLCβ signaling, impacting the transcription factor DAF-16/FOXO.
  • Mammalian GABAB receptors can functionally replace C. elegans GBB-1 in lifespan control.

Conclusions:

  • GABA signaling represents a novel regulator of lifespan in C. elegans.
  • The GABAB receptor GBB-1 and downstream pathways are crucial for this longevity effect.
  • Findings suggest a conserved role for GABA signaling in aging across species, potentially including mammals.