Inflammatory burning pain depends on a specific line of nociceptors
Febrianto, R. M.; Aldossary, D.; Zimmermann, D.; Irfan, J.; Meng, M.; Sanvido, I.; Zhou, L.; Kong, G.; Kecskes, A.; La Montanara, P.; Torres-Perez, J. V.; Pocsai, K.; Gaal, B. A.; D'Ercole, A. M.; Li, N.; Szoke, E.; Wan, J.; Matesz, K.; Arthur, S.; Pinter, E.; Di Giovanni, S.; Kress, M.; Nagy, I.
Show abstract
The development and persistence of burning pain and heat hyperalgesia following tissue injury and the subsequent inflammatory response, depend on the nuclear enzyme mitogen- and stress-activated kinase 1 (MSK1) expressed in a specific subset of transient receptor potential subfamily V member 1 (TRPV1)-expressing primary sensory neurons termed nociceptors, which are specialised for detecting harmful stimuli. Inflammation up-regulates and activates MSK1, and MSK1 governs TRPV1 expression in the MSK1 and TRPV1 co-expressing mouse and human nociceptors. Importantly, inhibition of inflammatory MSK1-mediated TRPV1 upregulation protects from heat hypersensitivity without affecting other relevant TRPV1 functions, such as the sensation of acute painful heat stimuli or the maintenance of the body core temperature. The newly discovered importance of the interaction between MSK1 and TRPV1 in a specific line of nociceptors provides mechanistic understanding of inflammatory pain and heat hyperalgesia pathogenesis.
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