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AMPK-mTOR Signaling and Cellular Adaptations in Hypoxia
1Department of Oral Biochemistry and Molecular Biology, School of Dentistry, Kyung Hee University, Seoul 02447, Korea.
International Journal of Molecular Sciences
|September 28, 2021
Summary
Cellular energy production relies on oxygen, and low oxygen levels (hypoxia) integrate with nutrient sensing. This review explores how hypoxia signaling interacts with AMP-activated protein kinase (AMPK) and mechanistic target of rapamycin complex 1 (mTORC1) pathways.
Area of Science:
- Cellular biology
- Molecular biology
- Physiology
Background:
- Cellular energy relies on mitochondrial respiration and oxygen supply.
- Hypoxia, or decreased oxygen, integrates with nutrient signaling pathways.
- Hypoxia triggers significant cellular adaptations impacting metabolism and gene expression.
Purpose of the Study:
- To review current knowledge on hypoxia signaling.
- To examine the interplay between hypoxia and cellular energy/nutrient sensing pathways.
- To discuss the molecular crosstalk between hypoxia, AMP-activated protein kinase (AMPK), and mechanistic target of rapamycin complex 1 (mTORC1).
Main Methods:
- Literature review of hypoxia signaling.
- Analysis of cellular energy and nutrient sensing pathways.
- Discussion of molecular crosstalk mechanisms.
Main Results:
- Hypoxia profoundly affects cellular metabolism and induces adaptive responses.
- AMP-activated protein kinase (AMPK) and mechanistic target of rapamycin complex 1 (mTORC1) are key regulators of cellular response to energy and nutrient status.
- Complex molecular interactions exist between hypoxic signaling and AMPK/mTOR pathways.
Conclusions:
- Hypoxia signaling is intricately linked with cellular energy and nutrient sensing pathways, particularly AMPK and mTORC1.
- Understanding this crosstalk is crucial for comprehending cellular adaptations to hypoxic stress.
- Further research into these interactions can illuminate therapeutic strategies for hypoxia-related conditions.
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