title: Minocycline attenuates mechanical allodynia and expression of spinal NMDA receptor 1 subunit in rat neuropathic pain model.
abstract: Recent studies have indicated that minocycline, a microglia inhibitor, could potentially be used as an antinociceptive agent in pain management, although the underlying mechanisms remain elusive. In this study, we investigated the extent to which minocycline could influence pain behavior in association with the expression of the N-methyl-D-aspartic acid receptor 1 (NMDAR1) in a rat L5 spinal nerve ligation (SNL) model. We observed that the intrathecal injection of minocycline significantly attenuated mechanical allodynia in a rat SNL model from day 1 postinjection and persisted for at least 18 days. We also observed that the expression of NMDAR1 was increased in the spinal dorsal horn at 8 days after SNL, which could be partly inhibited through the intrathecal injection of minocycline. These findings suggest that the attenuation of allodynia in the SNL model following minocycline administration might be associated with the inhibited expression of NMDAR1 and, therefore, might play an important role in the minocycline-mediated antinociception.
authors.affiliation: Pain Management Center, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
authors.forename: Shaofeng
authors.initials: S
authors.lastname: Pu
authors.forename: Yongming
authors.initials: Y
authors.lastname: Xu
authors.forename: Dongping
authors.initials: D
authors.lastname: Du
authors.forename: Meirong
authors.initials: M
authors.lastname: Yang
authors.forename: Xin
authors.initials: X
authors.lastname: Zhang
authors.forename: Junzhen
authors.initials: J
authors.lastname: Wu
authors.forename: Wei
authors.initials: W
authors.lastname: Jiang
mesh_terms: D000700:Analgesics / Q000494:pharmacology*; D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002408:Catheters, Indwelling; D004195:Disease Models, Animal; D058492:Drug Repositioning; D015870:Gene Expression; D006930:Hyperalgesia / Q000188:drug therapy* / Q000378:metabolism / Q000503:physiopathology; D007278:Injections, Spinal; D008297:Male; D008911:Minocycline / Q000494:pharmacology*; D009437:Neuralgia / Q000188:drug therapy* / Q000378:metabolism / Q000503:physiopathology; D051381:Rats; D017207:Rats, Sprague-Dawley; D016194:Receptors, N-Methyl-D-Aspartate / Q000037:antagonists & inhibitors* / Q000235:genetics / Q000378:metabolism; D013116:Spinal Cord / Q000187:drug effects / Q000378:metabolism; D013127:Spinal Nerves / Q000187:drug effects / Q000378:metabolism
chemical_list: D000700:Analgesics; D000900:Anti-Bacterial Agents; D008911:Minocycline; D016194:Receptors, N-Methyl-D-Aspartate