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Palmitoylation by ZDHHC4 inhibits TRPV1-mediated nociception

Youjing Zhang1, Mengyu Zhang1, Cheng Tang2

  • 1State Key Laboratory of Virology, TaiKang Center for Life and Medical Sciences, College of Life Sciences, Frontier Science Center for Immunology and Metabolism, Hubei Key Laboratory of Cell Homeostasis, Wuhan University, Wuhan, Hubei, 430072, China.

EMBO Reports
|November 11, 2024
PubMed

Insights

S-palmitoylation of the TRPV1 channel promotes its degradation, facilitating inflammatory pain relief. This process is regulated by ZDHHC4 and APT1, offering insights into pain sensation mechanisms.

Area of Science:

  • Molecular biology
  • Neuroscience
  • Pain research

Background:

  • Transient receptor potential vanilloid 1 (TRPV1) channels are key players in pain sensation, particularly in hyperalgesia.
  • The role of TRPV1 in pain relief, specifically its functional decline, is not well understood.

Purpose of the Study:

  • To investigate the mechanisms underlying the functional decline of TRPV1 during inflammatory pain relief.
  • To identify the molecular players involved in regulating TRPV1 activity and degradation.

Main Methods:

  • Molecular assays to identify protein interactions and modifications.
  • Electrophysiological recordings to assess TRPV1 channel function.
  • In vivo studies to evaluate the physiological relevance in an animal model.

Main Results:

  • S-palmitoylation of TRPV1 by ZDHHC4 promotes its degradation through the lysosome pathway, leading to inflammatory pain relief.
  • Specific cysteine residues (C157, C362, C390, C715) are identified as sites for TRPV1 S-palmitoylation.
  • Acyl-protein thioesterase 1 (APT1) counterbalances palmitoylation, suggesting a mechanism for pain sensation restoration.

Conclusions:

  • S-palmitoylation is a critical regulatory mechanism for TRPV1 function, essential for the relief phase of inflammatory pain.
  • The interplay between ZDHHC4-mediated palmitoylation and APT1-mediated depalmitoylation provides a dynamic control of pain signaling.
  • These findings offer novel therapeutic targets for managing inflammatory pain by modulating TRPV1 activity.
Keywords:
Inflammatory PainPalmitoylationProtein DegradationTRPV1ZDHHC4

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