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Updated: Dec 31, 2025
07:15
Anaerobic Growth and Maintenance of Mammalian Cell Lines
Published on: July 21, 2018
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Hypertonic external medium represses cellular respiration and promotes Warburg/Crabtree effect.
Minoo Hamraz1, Raymond Abolhassani2, Mireille Andriamihaja3
1Institut Cochin, INSERM, CNRS, Université de Paris, Paris, France.
Summary
Hyperosmotic conditions impair cellular energy metabolism by reducing mitochondrial respiration and increasing glycolysis. Cells adapt by lowering ATP turnover and partially uncoupling mitochondria to maintain viability.
Area of Science:
- Cellular Biology
- Metabolic Biochemistry
- Pathophysiology
Background:
- Hyperosmotic conditions are linked to various pathological states.
- Understanding cellular responses to osmotic stress is crucial for metabolic research.
Purpose of the Study:
- To investigate the impact of hyperosmotic environments on cellular energy metabolism.
- To identify adaptive mechanisms cells employ to maintain ATP levels and viability under osmotic stress.
Main Methods:
- Cellular exposure to hyperosmotic media.
- Measurement of mitochondrial oxidative phosphorylation rates.
- Analysis of glycolysis and ATP turnover.
- Assessment of mitochondrial uncoupling.
Main Results:
- Hyperosmotic conditions rapidly decrease mitochondrial oxidative phosphorylation.
- Increased glycolysis (Warburg/Crabtree effect) was observed, inhibiting respiration.
- Cells reduced ATP turnover rate and exhibited partial mitochondrial uncoupling.
- Mitochondrial uncoupling enhanced ATP production independent of glucose.
Conclusions:
- Cells exhibit multifaceted metabolic adaptations to hyperosmotic stress.
- These adaptations include reduced respiration, increased glycolysis, and altered mitochondrial function.
- These mechanisms are vital for preserving cellular ATP levels and viability during osmotic challenges.
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