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Genetic variation in glia-neuron signalling modulates ageing rate
Jiang-An Yin1, Ge Gao1,2, Xi-Juan Liu1
1Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031, China.
Nature
|November 10, 2017
Summary
Researchers discovered a genetic basis for varying aging rates in C. elegans. Specific genes, RGBA-1 and NPR-28, influence the decline of mating behavior, revealing a novel pathway controlling aging speed.
Area of Science:
- Genetics
- Neuroscience
- Aging Research
Background:
- The rate of behavioral decline during aging varies significantly across individuals.
- Identifying factors that control healthy aging is crucial, but no specific factors have been found yet.
- Natural variation in aging rates offers insights into the underlying biological mechanisms.
Purpose of the Study:
- To investigate the genetic basis for natural variation in aging rates in Caenorhabditis elegans.
- To identify specific genes and signaling pathways that modulate the rate of age-related behavioral decline.
- To understand the role of glia-neuron communication in regulating aging processes.
Main Methods:
- Comparative analysis of C. elegans isolates to assess variations in lifespan and age-related behavioral decline (virility, pharyngeal pumping, locomotion).
- Genetic analysis to identify DNA polymorphisms in genes, including a novel peptide-coding gene (rgba-1) and a neuropeptide receptor gene (npr-28).
- Functional studies to determine how RGBA-1 and NPR-28 signaling influence age-related decline in mating behavior and its connection to mitochondrial pathways.
Main Results:
- C. elegans isolates exhibit diverse lifespans and rates of age-related decline in various behaviors.
- DNA polymorphisms in the regulatory-gene-for-behavioural-ageing-1 (rgba-1) and npr-28 genes significantly affect the rate of decline in mating behavior.
- Glia-derived RGBA-1 activates NPR-28 signaling in neurons, accelerating behavioral aging via SIR-2.1 and the mitochondrial unfolded protein response.
Conclusions:
- Natural variation in neuropeptide-mediated glia-neuron signaling is a key modulator of aging rates in C. elegans.
- The RGBA-1/NPR-28 pathway, involving neuronal signaling and mitochondrial responses, provides a novel mechanism influencing behavioral aging.
- These findings highlight the genetic control over aging variability and suggest potential targets for interventions promoting healthy aging.
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