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eEF2K regulates pain through translational control of BDNF
Patrick R Smith1, Guadalupe Garcia1, Angela R Meyer1
1Department of Anesthesiology, University of Wisconsin, Madison, Madison, WI, USA.
Molecular Cell
|December 18, 2024
Summary
A painful cue activates elongation factor 2 kinase (eEF2K) and the integrated stress response (ISR), regulating mRNA translation for pain. Blocking brain-derived neurotrophic factor (BDNF) translation offers pain relief.
Area of Science:
- Neuroscience
- Molecular Biology
- Pain Research
Background:
- mRNA translation plays a crucial role in pain perception.
- Key regulatory factors and target mRNAs in pain-associated translation remain largely unidentified.
Purpose of the Study:
- To elucidate the mechanism linking noxious stimuli to translational control in sensory neurons.
- To identify key regulators and their roles in pain-associated mRNA translation.
Main Methods:
- Investigated the role of elongation factor 2 kinase (eEF2K) and the integrated stress response (ISR) in murine sensory neurons.
- Utilized in vivo models to assess pain behaviors and the effects of blocking brain-derived neurotrophic factor (BDNF) translation.
Main Results:
- Painful stimuli activate eEF2K, repressing peptide chain elongation and triggering the ISR.
- Both eEF2K and ISR are essential for pain-associated behaviors.
- This pathway induces BDNF biosynthesis, and its translational blockade yields analgesic effects.
Conclusions:
- eEF2K acts as a central regulator, connecting painful cues to multiple levels of translational control.
- Precise spatiotemporal regulation of BDNF translation is critical for behavioral responses to pain.
- Targeting this pathway offers potential therapeutic strategies for pain management.
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