Related Experiment Video
Updated: May 15, 2025
09:18
Quantifying Tissue-Specific Proteostatic Decline in Caenorhabditis elegans
Published on: September 7, 2021
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CaMK modulates sensory neural activity to control longevity and proteostasis
Ranran Zhao1, Weiqi Ge2, Weikang Xue1
1Department of Neurology, Medical Research Institute, Frontier Science Center of Immunology and Metabolism, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430071, China.
Summary
Reduced CaMK4 expression in the brain correlates with human longevity. This finding, conserved in worms, shows that suppressing neural activity extends lifespan and improves proteostasis by regulating sensory neuron signaling.
Area of Science:
- Neuroscience
- Aging Research
- Molecular Biology
Background:
- Neural activity's role in aging and longevity is not fully understood.
- Specific neuron groups and molecular pathways regulating lifespan require identification.
Purpose of the Study:
- To investigate the link between neural activity, aging, and longevity.
- To identify molecular mechanisms and neuron groups involved in lifespan regulation.
Main Methods:
- Correlated human longevity with CaMK4 expression in the frontal cortex.
- Utilized *Caenorhabditis elegans* to study the conserved homolog CMK-1.
- Investigated the role of thermosensory AFD neurons and the INS-1/insulin pathway.
Main Results:
- Reduced CaMK4 expression is correlated with human longevity.
- Loss of CMK-1 in *C. elegans* increases longevity and proteostasis.
- Suppressed AFD neuron activity, particularly at high temperatures, drives these beneficial effects.
- This pathway involves insulin signaling (INS-1) and DAF-16/FOXO activation in the intestine.
Conclusions:
- Sensory neural activity causally influences lifespan and organismal proteostasis.
- CaMK plays a significant role in regulating neural activity to shape aging processes.
- Identified a novel neural circuit mechanism linking sensory perception to longevity.
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