Sakai Akinori
   Department   Wakamatsu Hospital of the University of Occupational and Environmental Health  Hospital President, Wakamatsu Hospital
   School of Medicine  Orthopedic Surgery, Clinical Medical Sciences
Article types journal article
Language English
Peer review Peer reviewed
Title Role of Trpv1 and Trpv4 in surgical incision-induced tissue swelling and Fos-like immunoreactivity in the central nervous system of mice.
Journal Formal name:Neuroscience Letters
Abbreviation:Neurosci Lett
ISSN code:18727972/03043940
Domestic / ForeginForegin
Volume, Issue, Page 678,76-82頁
Author and coauthor Motojima Yasuhito, Nishimura Haruki, Ueno Hiromichi, Sonoda Satomi, Nishimura Kazuaki, Tanaka Kentaro, Saito Reiko, Yoshimura Mitsuhiro, Maruyama Takashi, Matsuura Takanori, Suzuki Hitoshi, Kawasaki Makoto, Ohnishi Hideo, Sakai Akinori, Ueta Yoichi
Publication date 2018/05
Summary Pain management remains a major concern regarding the treatment of postoperative patients. Transient receptor potential (TRP) channels are considered to be new therapeutic targets for pain control. We investigated whether the genes Trpv1 and Trpv4 are involved in hind paw swelling caused after surgical incision in mice or in incision-induced Fos-like immunoreactivity (Fos-LI) levels in the central nervous system. Mice were divided into four groups: wild-type (WT) control, WT incision, Trpv1 knockout (Trpv1-/-) incision, and Trpv4 knockout (Trpv4-/-) incision. Mice were anesthetized, and only those in the incision, and not control, groups received a surgical incision to their right plantar hind paw. Changes in paw diameter and in Fos-LI levels in the dorsal horn of the spinal cord, paraventricular nucleus of the hypothalamus (PVN), paraventricular nucleus of the thalamus, and central amygdala were evaluated 2 hours after the incision. There was no significant difference in the paw diameter among groups. In contrast, in laminae I-II of the dorsal horn of the spinal cord and PVN, Fos-LI was significantly higher in all incision groups than in the WT control group. A significant increase in Fos-positive cells was also observed in the dorsal horn laminae III-IV in Trpv1-/- and Trpv4-/- incision groups compared with the WT incision group. Our results indicate that surgical incision activates the PVN and that Trpv1 and Trpv4 might be involved in neuronal activity in the dorsal horn laminae III-IV after surgical incision.
DOI 10.1016/j.neulet.2018.05.001
PMID 29733975