PMID- 32138533 OWN - NLM STAT- MEDLINE DCOM- 20200827 LR - 20200827 IS - 1793-6853 (Electronic) IS - 0192-415X (Linking) VI - 48 IP - 2 DP - 2020 TI - Corydalis saxicola Alkaloids Attenuate Cisplatin-Induced Neuropathic Pain by Reducing Loss of IENF and Blocking TRPV1 Activation. PG - 407-428 LID - 10.1142/S0192415X20500214 [doi] AB - Chemotherapy-induced peripheral neuropathy (CIPN) is a common complication of cisplatin, which is characterized by intolerable paresthesia, burning, and hyperalgesia, and severely impacts the life quality of patients. However, no clearly potent drug has been found for clinical medication due to its undefined mechanism. Corydalis Saxicola Bunting, a traditional Chinese medicine, has been proven to work well in anti-inflammation, blood circulations improvement, hemostasis, and analgesia. This study was designed to observe the effects of Corydalis saxicola Bunting total alkaloids (CSBTA) on cisplatin-induced neuropathic pain and to explore its potential mechanisms. In this study, the rats received intraperitoneal injection of 2 mg/kg cisplatin twice a week for five weeks. Meanwhile, oral administration of low (30 mg/kg)-, medium (60 mg/kg)- and high (120 mg/kg)-dose CSBTA were given daily for five weeks. By using Von-frey hair, heat radiant and - 80 composite functionC cold acetone, we found that CSBTA could obviously relieve cisplatin-induced mechanical, heat, and cold hyperalgesia. It has been verified that cisplatin-induced peripheral neuropathy is related to intraepidermal nerve fibers loss and activation of inflammation downstream. Our research found that Tumor necrosis factor-alpha (TNF-alpha), Interleukin-1beta (IL-1beta), and Prostaglandin E2 (PGE2) were significantly increased by 10 intraperitoneal injections of cisplatin, and such pro-inflammation cytokines could be reduced via CSBTA administration. Besides, in the cisplatin model group, the neuronal structures of dorsal root ganglia (DRG) were severely damaged and the loss of intraepidermal nerve fibers occurred; but in the CSBTA administration groups, all above pathological changes were improved. Moreover, CSBTA could normalize the overexpression levels of p-p38 and Transient receptor potential vanilloid receptor (TRPV1) induced by cisplatin in DRG, trigeminal ganglion (TG), spinal cord, and foot of rats. In summary, we considered that CSBTA exerted its therapeutic effects by ameliorating neuronal damages, improving intraepidermal nerve fiber (IENF) loss, and inhibiting inflammation-induced p38 phosphorylation to block TRPV1 activation. These findings were the first to confirm the analgesic effect of CSBTA on CIPN and suggested a novel strategy for treating CIPN in clinic. FAU - Kuai, Cui-Ping AU - Kuai CP AD - Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Nanjing, P. R. China. AD - Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Nanjing, P. R. China. FAU - Ju, Lin-Jie AU - Ju LJ AD - Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Nanjing, P. R. China. AD - Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Nanjing, P. R. China. FAU - Hu, Pei-Pei AU - Hu PP AD - Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Nanjing, P. R. China. AD - Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Nanjing, P. R. China. FAU - Huang, Fang AU - Huang F AD - Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Nanjing, P. R. China. AD - Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Nanjing, P. R. China. LA - eng PT - Journal Article DEP - 20200305 PL - Singapore TA - Am J Chin Med JT - The American journal of Chinese medicine JID - 7901431 RN - 0 (Alkaloids) RN - 0 (Analgesics) RN - 0 (TRPV Cation Channels) RN - 0 (Trpv1 protein, rat) RN - Q20Q21Q62J (Cisplatin) SB - IM MH - Alkaloids/isolation & purification/*pharmacology/*therapeutic use MH - *Analgesics MH - Animals MH - Cisplatin/*adverse effects MH - Corydalis/*chemistry MH - Neuralgia/*chemically induced/drug therapy/*genetics MH - *Phytotherapy MH - Rats MH - TRPV Cation Channels/*metabolism OTO - NOTNLM OT - CSBTA OT - Cisplatin OT - Corydalis saxicola OT - IENF OT - Inflammation OT - TRPV1 OT - p-p38 EDAT- 2020/03/07 06:00 MHDA- 2020/08/28 06:00 CRDT- 2020/03/07 06:00 PHST- 2020/03/07 06:00 [pubmed] PHST- 2020/08/28 06:00 [medline] PHST- 2020/03/07 06:00 [entrez] AID - 10.1142/S0192415X20500214 [doi] PST - ppublish SO - Am J Chin Med. 2020;48(2):407-428. doi: 10.1142/S0192415X20500214. Epub 2020 Mar 5.