PMID- 33667472 OWN - NLM STAT- MEDLINE DCOM- 20210630 LR - 20210630 IS - 1873-2968 (Electronic) IS - 0006-2952 (Linking) VI - 186 DP - 2021 Apr TI - Perineural high-mobility group box 1 induces mechanical hypersensitivity through activation of spinal microglia: Involvement of glutamate-NMDA receptor dependent mechanism in spinal dorsal horn. PG - 114496 LID - S0006-2952(21)00092-7 [pii] LID - 10.1016/j.bcp.2021.114496 [doi] AB - High mobility box 1 (HMGB1), a damage-associated molecular pattern, has crucial roles in induction of neuropathic pain. Upregulation of HMGB1 around the injured sciatic nerve contributes to mechanical hypersensitivity following partial sciatic nerve ligation (PSNL) of mice. However, central mechanisms mediating perineural HMGB1-induced nociceptive hypersensitivity, especially within the spinal dorsal horn, have not been determined. The current study shows that perineural treatment of naive mice with recombinant HMGB1, which mimics increased HMGB1 around the injured sciatic nerve of PSNL mice, significantly induced activation of microglia, but not astrocytes, in the spinal dorsal horn. Intraperitoneal injection of minocycline, a microglial inhibitor, ameliorated perineural rHMGB1-induced mechanical hypersensitivity. In addition, blockade of spinal N-methyl-D-aspartate (NMDA) receptors significantly prevented perineural rHMGB1-induced mechanical hypersensitivity and microglial activation. In contrast, non-NMDA receptors, neurokinin 1 receptor, colony-stimulating factor 1 receptor and P2Y(12) receptor were not involved in perineural rHMGB1-induced mechanical hypersensitivity. Furthermore, repeated perineural treatment with an anti-HMGB1 antibody blocked activation of spinal microglia in PSNL mice. Collectively, the current findings demonstrate that increased HMGB1 around injured sciatic nerve might induce nociceptive hypersensitivity through activation of spinal microglia. Thus, HMGB1-dependent mechanisms between the injured sciatic nerve and spinal dorsal horn could be crucial in induction of neuropathic pain. CI - Copyright (c) 2021 Elsevier Inc. All rights reserved. FAU - Nakamura, Yoki AU - Nakamura Y AD - Department of Pharmacology, Hiroshima University Graduate School of Biomedical and Health Sciences, Japan. FAU - Fukuta, Ayako AU - Fukuta A AD - Department of Pharmacology, Hiroshima University Graduate School of Biomedical and Health Sciences, Japan. FAU - Miyashita, Keita AU - Miyashita K AD - Department of Pharmacology, Hiroshima University Graduate School of Biomedical and Health Sciences, Japan. FAU - Zhang, Fang Fang AU - Zhang FF AD - Department of Pharmacology, Hiroshima University Graduate School of Biomedical and Health Sciences, Japan; Institute of Pharmacology, Taishan Medical University. FAU - Wang, Dengli AU - Wang D AD - Department of Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Japan. FAU - Liu, Keyue AU - Liu K AD - Department of Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Japan. FAU - Wake, Hidenori AU - Wake H AD - Department of Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Japan; Department of Pharmacology, Faculty of Medicine, Kindai University, Japan. FAU - Hisaoka-Nakashima, Kazue AU - Hisaoka-Nakashima K AD - Department of Pharmacology, Hiroshima University Graduate School of Biomedical and Health Sciences, Japan. FAU - Nishibori, Masahiro AU - Nishibori M AD - Department of Pharmacology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Japan. FAU - Morioka, Norimitsu AU - Morioka N AD - Department of Pharmacology, Hiroshima University Graduate School of Biomedical and Health Sciences, Japan. Electronic address: mnori@hiroshima-u.ac.jp. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210303 PL - England TA - Biochem Pharmacol JT - Biochemical pharmacology JID - 0101032 RN - 0 (Excitatory Amino Acid Antagonists) RN - 0 (Glutamates) RN - 0 (HMGB1 Protein) RN - 0 (HMGB1 protein, human) RN - 0 (Receptors, N-Methyl-D-Aspartate) RN - 6384-92-5 (N-Methylaspartate) SB - IM MH - Animals MH - Excitatory Amino Acid Antagonists/administration & dosage MH - Glutamates/*metabolism MH - HMGB1 Protein/*metabolism/toxicity MH - Humans MH - Hyperalgesia/chemically induced/*metabolism MH - Injections, Spinal MH - Male MH - Mice MH - Microglia/drug effects/*metabolism MH - N-Methylaspartate/administration & dosage MH - Peripheral Nerves/drug effects/metabolism MH - Receptors, N-Methyl-D-Aspartate/antagonists & inhibitors/*metabolism MH - Spinal Cord Dorsal Horn/drug effects/*metabolism OTO - NOTNLM OT - Allodynia OT - HMGB1 OT - Microglia OT - NMDA receptor OT - Neuropathic pain OT - Sciatic nerve EDAT- 2021/03/06 06:00 MHDA- 2021/07/01 06:00 CRDT- 2021/03/05 20:10 PHST- 2021/01/15 00:00 [received] PHST- 2021/02/24 00:00 [revised] PHST- 2021/02/25 00:00 [accepted] PHST- 2021/03/06 06:00 [pubmed] PHST- 2021/07/01 06:00 [medline] PHST- 2021/03/05 20:10 [entrez] AID - S0006-2952(21)00092-7 [pii] AID - 10.1016/j.bcp.2021.114496 [doi] PST - ppublish SO - Biochem Pharmacol. 2021 Apr;186:114496. doi: 10.1016/j.bcp.2021.114496. Epub 2021 Mar 3.