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Published on: June 3, 2016
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Conserved lipid metabolic reprogramming confers hypoxic and aging resilience
Wei I Jiang1, Goncalo Dias do Vale2, Quentinn Pearce3,4
1Cardiovascular Research Institute, University of California San Francisco, San Francisco, CA, USA.
EMBO Reports
|December 11, 2025
Summary
Arctic ground squirrels show metabolic resilience to hypoxia by downregulating triglycerides. This conserved mechanism protects neural stem cells and offers insights into aging and neurodegenerative diseases.
Area of Science:
- Cellular metabolism
- Neuroscience
- Hibernation biology
Background:
- Arctic ground squirrels (AGS) are extreme hibernators with remarkable resilience to hypoxia and hypothermia.
- The mechanisms behind AGS resilience are not well understood.
- AGS serve as a model for studying cellular metabolic adaptation.
Purpose of the Study:
- To investigate the metabolic adaptations underlying AGS resilience to hypoxia.
- To identify specific molecular pathways involved in AGS cellular resilience.
- To explore the potential of these pathways as therapeutic targets for neurological conditions and aging.
Main Methods:
- Lipidomic and metabolomic profiling of AGS neural stem cells (NSCs) compared to murine NSCs.
- Inhibition of lipid biosynthesis in AGS NSCs to assess its effect on hypoxic resilience.
- Experimental manipulation of lipid biosynthesis in C. elegans under hypoxic conditions.
- Assessment of APOE4-induced pathologies and aging trajectories in C. elegans with inhibited lipid biosynthesis.
Main Results:
- AGS NSCs showed downregulation of triglyceride lipids and upregulation of malonic acid compared to murine NSCs.
- Inhibiting lipid biosynthesis in AGS NSCs replicated their hypoxic resilience.
- Hypoxia downregulated key lipid biosynthetic enzymes in C. elegans.
- Inhibiting lipid biosynthesis in C. elegans reduced mitochondrial fission and improved hypoxic survival.
- Inhibiting lipid biosynthesis protected C. elegans against APOE4-induced pathologies and aging.
Conclusions:
- Triglyceride downregulation is a conserved metabolic resilience mechanism.
- This mechanism offers protective strategies for neural tissues facing hypoxia or ischemia.
- Targeting lipid biosynthesis may provide therapeutic benefits for APOE4-related diseases and aging.
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