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mTOR Signaling in Metabolic Stress Adaptation.

Cheng-Wei Wu1,2, Kenneth B Storey3

  • 1Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, 52 Campus Drive, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada.

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Summary

The mechanistic target of rapamycin (mTOR) pathway regulates cellular homeostasis and is crucial for animal survival during environmental stress. This review details how mTOR controls hypometabolic states like hibernation and dauer diapause.

Keywords:
AktTORanoxiacell signalingdauerenvironmental stressestivationhibernationhypoxiametabolismprotein translation

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Area of Science:

  • Cellular Biology
  • Physiology
  • Biochemistry

Background:

  • The mechanistic target of rapamycin (mTOR) is a key regulator of cellular homeostasis, integrating signals for cell growth and survival.
  • mTOR signaling is implicated in numerous human diseases and metabolic functions.
  • Recent research highlights mTOR's role in initiating hypometabolic states for survival under environmental stress.

Purpose of the Study:

  • To review the role of mTOR in natural animal hypometabolic states.
  • To explore mTOR's regulation in response to diverse environmental stressors.
  • To understand how mTOR signaling promotes survival during stress-induced hypometabolism.

Main Methods:

  • Literature review of studies on mTOR and hypometabolic states.
  • Analysis of mTOR pathway regulation across various animal models.
  • Synthesis of data on stressor-dependent mTOR activity.

Main Results:

  • mTOR plays a critical role in natural hypometabolic states including hibernation, estivation, hypoxia/anoxia tolerance, and dauer diapause.
  • mTOR exhibits unique regulatory patterns dependent on specific environmental stressors.
  • Key mTOR pathway proteins show distinct regulation patterns in different animal stress models.

Conclusions:

  • mTOR signaling is a conserved mechanism for survival across diverse animal species facing environmental challenges.
  • Understanding mTOR's stress-dependent regulation provides insights into adaptation and disease.
  • Targeting mTOR pathways could offer novel therapeutic strategies for metabolic and stress-related disorders.