Local Administration of a Synthetic Cell-Penetrating Peptide Antagonizing TrkA Function Suppresses Inflammatory Pain in Rats

Journal of Pharmacological Sciences

Kenji Shigemi³  Masashi Ueda³  Koyo Ueda³  Hiroshi Ikeda¹  Eri Murata³  Mayumi Takatori²  Munetaka Hirose³ 

[1] Department of Human and Artificial Intelligence Systems, Graduate School of Engineering, University of Fukui, Japan;Department of Anesthesiology, Kyoto Prefectural University of Medicine, Japan;Department of Anesthesiology and Reanimatology, Faculty of Medical Sciences, University of Fukui, Japan

关键词: cell-penetrating peptide;    inflammatory pain;    Tat;    TrkA;    transient receptor potential vanilloid subfamily member 1 (TRPV1);   

DOI  :  10.1254/jphs.09307FP

学科分类：药学

来源: Nihon Yakuri Gakkai Henshuubu / Japanese Pharmacological Society

【 摘 要 】

References(26)Cited-By(3)Novel agents that inhibit nerve growth factor signaling are required for the treatment of inflammatory pain. The present study investigated the effect of local administration of inhibitory peptide of TrkA (IPTRK3), a synthetic cell-penetrating peptide that antagonizes TrkA function, in complete Freund’s adjuvant (CFA)–induced hyperalgesia in rats. Three hours after subcutaneous injection of CFA into the plantar surface of the rat’s left hind paw, 10 mM IPTRK3 was injected at the same site. Thermal and mechanical hyperalgesia were tested in the ipsilateral hind paw until 7 days after CFA injection. The ipsilateral dorsal root ganglion (DRG) was dissected out for immunohistochemical analysis of transient receptor potential vanilloid subfamily member 1 (TRPV1) channels and TrkA. Local injection of this peptide significantly suppressed both thermal and mechanical hyperalgesia produced by CFA and also significantly reduced TRPV1 expression at the DRG. These results suggest that local administration of IPTRK3 is likely effective in the treatment of inflammatory pain in rats.

【 授权许可】

Unknown