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A leucine-derived fatty acid unlocks the mTOR to development
Chung-Yang Yeh1, Dudley W Lamming1
1Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA; William S. Middleton Memorial Veterans Hospital, Madison, WI, USA.
Developmental Cell
|October 12, 2021
Summary
Researchers found a specific fatty acid that bypasses nutrient deprivation signals to activate mTORC1 in worms and human cells. This discovery sheds light on nutrient signaling pathways regulating development and aging.
Area of Science:
- Cellular biology
- Molecular biology
- Developmental biology
Background:
- Nutrient-sensitive signaling pathways are crucial for regulating cellular processes.
- Understanding these pathways is key to comprehending development and aging.
- The mechanistic target of rapamycin complex 1 (mTORC1) is a central regulator of cell growth and metabolism.
Purpose of the Study:
- To identify novel molecules that influence nutrient-sensitive signaling.
- To investigate how specific metabolites affect mTORC1 activation.
- To explore conserved mechanisms of nutrient sensing across species.
Main Methods:
- Utilized Caenorhabditis elegans as a model organism.
- Employed mammalian cell culture systems.
- Analyzed the effects of a specific monomethylated branched-chain fatty acid on signaling pathways.
Main Results:
- Identified a monomethylated branched-chain fatty acid that activates mTORC1.
- Demonstrated that this fatty acid overrides nutrient deprivation signals.
- Confirmed the conserved function of this mechanism in both C. elegans and mammalian cells.
Conclusions:
- A specific branched-chain fatty acid acts as a potent activator of mTORC1.
- This finding reveals a novel mechanism by which cells sense and respond to nutrients.
- The identified molecule and pathway have implications for understanding aging and metabolic disorders.
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