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Related Experiment Video

Updated: Mar 14, 2026

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice
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eIF2α phosphorylation controls thermal nociception.

Arkady Khoutorsky1, Robert E Sorge2, Masha Prager-Khoutorsky3

  • 1Department of Biochemistry, McGill University, Montreal, QC, Canada H3A 1A3; Rosalind and Morris Goodman Cancer Research Centre, McGill University, Montreal, QC, Canada H3A 1A3; Department of Anesthesia, McGill University, Montreal, QC, Canada H3G 1Y6; Alan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada H3G 1Y6.

Proceedings of the National Academy of Sciences of the United States of America
|October 5, 2016
PubMed
Summary

Cellular stress response protein eIF2α phosphorylation regulates heat sensation. Inhibiting this pathway reduces thermal pain, offering a potential target for alleviating heat-related pain.

Keywords:
TRPV1cellular stress response pathwayeIF2αpain

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Area of Science:

  • Neuroscience
  • Cellular Biology
  • Molecular Biology

Background:

  • Cellular homeostasis relies on stress response mechanisms.
  • Eukaryotic initiation factor 2 (eIF2) integrates stress signals and regulates translation.
  • Phosphorylation of eIF2α at Ser51 modulates protein synthesis and cellular adaptation.

Purpose of the Study:

  • To investigate the role of eIF2α phosphorylation in the control of noxious heat sensation.
  • To explore the potential of targeting eIF2α phosphorylation for pain management.

Main Methods:

  • Utilized mice with genetically altered eIF2α phosphorylation (eIF2α+/S51A).
  • Administered pharmacological agents to modulate eIF2α phosphorylation.
  • Assessed thermal and mechanical pain sensitivity in various models.
  • Investigated the involvement of transient receptor potential vanilloid 1 (TRPV1).

Main Results:

  • Mice with reduced eIF2α phosphorylation showed decreased responses to noxious heat.
  • Pharmacological inhibition of eIF2α phosphorylation lowered thermal pain sensitivity.
  • Increased eIF2α phosphorylation enhanced thermal nociception.
  • The effect of eIF2α phosphorylation on thermal thresholds was dependent on TRPV1.
  • Induced eIF2α phosphorylation in sensory neurons contributed to thermal hypersensitivity in a chronic inflammation pain model.

Conclusions:

  • eIF2α phosphorylation is a key regulator of thermal pain sensation.
  • The cellular stress response pathway involving p-eIF2α presents a therapeutic target for pathological heat sensation.
  • Targeting eIF2α phosphorylation could offer a novel approach to pain relief.