PMID- 28812173 OWN - NLM STAT- MEDLINE DCOM- 20180710 LR - 20220321 IS - 1573-2576 (Electronic) IS - 0360-3997 (Linking) VI - 40 IP - 6 DP - 2017 Dec TI - Melatonin Attenuates Pain Hypersensitivity and Decreases Astrocyte-Mediated Spinal Neuroinflammation in a Rat Model of Oxaliplatin-Induced Pain. PG - 2052-2061 LID - 10.1007/s10753-017-0645-y [doi] AB - Neuroinflammatory response in spinal dorsal horn has been demonstrated to be a critical factor in oxaliplatin-induced pain. Melatonin has been shown to have anti-inflammatory and anti-allodynia effects in both preclinical and clinical studies. In the present study, we investigated the role of systemic administration of melatonin on oxaliplatin-induced pain. Intraperitoneal (i.p.) injection with oxaliplatin induced significantly mechanical allodynia and thermal hyperalgesia. Melatonin (i.p.) significantly alleviated mechanical allodynia and thermal hyperalgesia in the oxaliplatin but not sham-treated rats. The attenuation of nociceptive response persisted at least to 3 days after melatonin injection, throughout the entire observing window. Immunohistochemistry showed that oxaliplatin induced a significant increase of glial fibrillary acidic protein (GFAP) immunodensities, which could be suppressed by melatonin. Western blotting showed that GFAP protein levels were significantly elevated in the oxaliplatin-vehicle group. Melatonin significantly decreased oxaliplatin-induced upregulation of GFAP expressions. Oxaliplatin injection also enhanced the messenger RNA (mRNA) expressions of cytokines including interleukin-1beta (IL-1beta) and tumor necrosis factor-alpha (TNF-alpha) and chemokines including monocyte chemoattractant protein-1 (MCP-1) and monocyte inflammatory protein-1 (MIP-1alpha) in the spinal dorsal horn, which could be significantly repressed by melatonin. In vitro study showed that mRNA levels of TNF-alpha, IL-1beta, MCP-1, and MIP-1alpha in primarily astrocytes were significantly increased after lipopolysaccharide (LPS, 1 mug/ml) stimulation. Melatonin (10 and 100 muM) greatly inhibited synthesis of these inflammatory mediators, in a dose-related manner. Conclusively, our data provide a novel implication of anti-nociceptive mechanism of melatonin in chemotherapy-related pain. FAU - Wang, Ye-Song AU - Wang YS AD - Department of Intensive Care Unit, Second Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China. FAU - Li, Yuan-Yuan AU - Li YY AD - Department of Neurointensive Care Unit, Second Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China. FAU - Cui, Wei AU - Cui W AD - Department of Intensive Care Unit, Second Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China. FAU - Li, Li-Bin AU - Li LB AD - Department of Intensive Care Unit, Second Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China. FAU - Zhang, Zhao-Cai AU - Zhang ZC AD - Department of Intensive Care Unit, Second Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China. FAU - Tian, Bao-Ping AU - Tian BP AD - Department of Intensive Care Unit, Second Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China. FAU - Zhang, Gen-Sheng AU - Zhang GS AD - Department of Intensive Care Unit, Second Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China. genshengzhang@zju.edu.cn. LA - eng PT - Journal Article PL - United States TA - Inflammation JT - Inflammation JID - 7600105 RN - 0 (Inflammation Mediators) RN - JL5DK93RCL (Melatonin) SB - IM MH - Animals MH - Astrocytes/metabolism/*pathology MH - Inflammation/*pathology MH - Inflammation Mediators/antagonists & inhibitors MH - Melatonin/*pharmacology/therapeutic use MH - Pain Measurement/*drug effects MH - Rats MH - Spinal Cord/*pathology OTO - NOTNLM OT - astrocyte OT - melatonin OT - neuroinflammation OT - neuropathic pain OT - oxaliplatin EDAT- 2017/08/16 06:00 MHDA- 2018/07/11 06:00 CRDT- 2017/08/17 06:00 PHST- 2017/08/16 06:00 [pubmed] PHST- 2018/07/11 06:00 [medline] PHST- 2017/08/17 06:00 [entrez] AID - 10.1007/s10753-017-0645-y [pii] AID - 10.1007/s10753-017-0645-y [doi] PST - ppublish SO - Inflammation. 2017 Dec;40(6):2052-2061. doi: 10.1007/s10753-017-0645-y.