A centipede toxin causes rapid desensitization of nociceptor TRPV1 ion channel

Aiqin Zhu, Aerziguli Aierken, Zhihao Yao, Simon Vu, Yuhua Tian, Jie Zheng, Shilong Yang, Fan Yang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The nociceptive transient receptor potential vanilloid 1 (TRPV1) ion channel is a polymodal receptor for multiple painful stimuli, hence actively pursued as a target for analgesic drugs. We identified a small peptide toxin RhTx2 from the Chinese red-headed centipede that strongly modulates TRPV1 activities. RhTx2, a 31-amino-acid peptide, is similar to a TRPV1-activating toxin RhTx we have previously discovered but with four extra amino acids at the N terminus. We observed that, like RhTx, RhTx2 activated TRPV1, but RhTx2 rapidly desensitized the channel upon prolonged exposure. Desensitization was achieved by reducing both the open probability and the single-channel conductance. RhTx2 is not only a tool to study the desensitization mechanism of TRPV1, but also a promising starting molecule for developing novel analgesics.

Original languageEnglish (US)
Pages (from-to)41-49
Number of pages9
StatePublished - Apr 30 2020


  • Desensitization
  • Gating mechanisms
  • Nociception
  • Peptide toxins
  • TRPV1

ASJC Scopus subject areas

  • Toxicology


Dive into the research topics of 'A centipede toxin causes rapid desensitization of nociceptor TRPV1 ion channel'. Together they form a unique fingerprint.

Cite this