Phenolic acids isolated from the fungus Schizophyllum commune exert analgesic activity by inhibiting voltage-gated sodium channels

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• 作者：Hui-Min YAO^a ; Gan WANG^a ; ^# ; Ya-Ping LIU^c ; Ming-Qiang RONG^b ; Chuan-Bin SHEN^b ; Xiu-Wen YAN^a ; Xiao-Dong LUO^c ; ^{xdluo@mail.kib.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Ren LAI^a ; ^b ; ^{rlai72@njau.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Schizophyllum commune ; Sodium channel ; Phenolic acids ; Pain
• 刊名：Chinese Journal of Natural Medicines
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：14
• 期：9
• 页码：661-670
• 全文大小：4704 K

文摘

The present study was designed to search for compounds with analgesic activity from the Schizophyllum commune (SC), which is widely consumed as edible and medicinal mushroom world. Thin layer chromatography (TLC), tosilica gel column chromatography, sephadex LH 20, and reverse-phase high performance liquid chromatography (RP-HPLC) were used to isolate and purify compounds from SC. Structural analysis of the isolated compounds was based on nuclear magnetic resonance (NMR). The effects of these compounds on voltage-gated sodium (Na_V) channels were evaluated using patch clamp. The analgesic activity of these compounds was tested in two types of mouse pain models induced by noxious chemicals. Five phenolic acids identified from SC extracts in the present study included vanillic acid, m-hydroxybenzoic acid, o-hydroxybenzeneacetic acid, 3-hydroxy-5-methybenzoic acid, and p-hydroxybenzoic acid. They inhibited the activity of both tetrodotoxin-resistant (TTX-r) and tetrodotoxin-sensitive (TTX-s) Na_V channels. All the compounds showed low selectivity on Na_V channel subtypes. After intraperitoneal injection, three compounds of these compounds exerted analgesic activity in mice. In conclusion, phenolic acids identified in SC demonstrated analgesic activity, facilitating the mechanistic studies of SC in the treatment of neurasthenia.