Faculty, Staff and Student Publications

Language

English

Publication Date

6-5-2024

Journal

Neuron

DOI

10.1016/j.neuron.2024.02.016

PMID

38492574

Abstract

Efforts on developing transient receptor potential vanilloid 1 (TRPV1) drugs for pain management have been hampered by deleterious hypo- or hyperthermia caused by TRPV1 agonists/antagonists. Here, we compared the effects of four antagonists on TRPV1 polymodal gating and core body temperature (CBT) in Trpv1+/+, Trpv1-/-, and Trpv1T634A/T634A. Neither the effect on proton gating nor drug administration route, hair coverage, CBT rhythmic fluctuations, or inflammation had any influence on the differential actions of TRPV1 drugs on CBT. We identified the S4-S5 linker region exposed to the vanilloid pocket of TRPV1 to be critical for hyperthermia associated with certain TRPV1 antagonists. PSFL2874, a TRPV1 antagonist we discovered, is effective against inflammatory pain but devoid of binding to the S4-S5 linker and inducing CBT changes. These findings implicate that biased allosteric mechanisms exist for TRPV1 coupling to nociception and CBT regulation, opening avenues for the development of non-opioid analgesics without affecting CBT.

Keywords

Animals, Male, Mice, Allosteric Regulation, Analgesics, Body Temperature, Mice, Inbred C57BL, Mice, Knockout, Nociception, Pain, TRPV Cation Channels, S4-S5 linker domain, TRP-box domain, TRPV1 analgesics, biased allosteric mechanism, core body temperature, hyperthermia, nociception

Published Open-Access

yes

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