Tacrolimus, a calcineurin inhibitor, promotes capsaicin-induced colonic pain in mice

Journal of Pharmacological Sciences
Kazuki MatsuiAtsufumi Kawabata

Abstract

TRPV1 is phosphorylated and functionally upregulated by protein kinases, and negatively regulated by phosphatases including calcineurin. Since the clinical use of calcineurin-inhibiting immunosuppressants is commonly associated with chronic diarrhea, we examined if tacrolimus, a calcineurin inhibitor, promotes TRPV1-dependent colonic hypersensitivity in mice. Intracolonic administration of capsaicin, a TRPV1 agonist, caused referred hyperalgesia in the lower abdomen, an effect prevented by capsazepine, a TRPV1 blocker. Tacrolimus accelerated the intracolonic capsaicin-induced referred hyperalgesia. Similarly, intracolonic capsaicin caused spinal ERK phosphorylation, a marker for nociceptor excitation, an effect promoted by tacrolimus. Thus, tacrolimus may aggravate TRPV1-related colonic pain accompanying irritable bowel syndrome.

References

Mar 24, 2004·Journal of Pharmacological Sciences·Naoyuki KawaoAtsufumi Kawabata
Jun 23, 2005·Pflügers Archiv : European journal of physiology·Makoto Tominaga, Tomoko Tominaga
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Nov 26, 2014·Transplantation Proceedings·E SavvidakiD S Goumenos
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