{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T06:31:01Z","timestamp":1791354661054,"version":"4.3.1"},"reference-count":50,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2009,1,29]],"date-time":"2009-01-29T00:00:00Z","timestamp":1233187200000},"content-version":"vor","delay-in-days":1430,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["bpspubs.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["British J Pharmacology"],"published-print":{"date-parts":[[2005,3]]},"abstract":"<jats:p>\n<jats:list list-type=\"explicit-label\">\n<jats:list-item><jats:p>To gain further insight into the mechanisms underlying the antihyperalgesic and antiallodynic actions of gabapentin, a chronic pain model was prepared by partially ligating the sciatic nerve in mice. The mice then received systemic or local injections of gabapentin combined with either central noradrenaline (NA) depletion by 6\u2010hydroxydopamine (6\u2010OHDA) or <jats:italic>\u03b1<\/jats:italic>\u2010adrenergic receptor blockade.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Intraperitoneally (i.p.) administered gabapentin produced antihyperalgesic and antiallodynic effects that were manifested by elevation of the withdrawal threshold to a thermal (plantar test) or mechanical (von Frey test) stimulus, respectively.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Similar effects were obtained in both the plantar and von Frey tests when gabapentin was injected intracerebroventricularly (i.c.v.) or intrathecally (i.t.), suggesting that it acts at both supraspinal and spinal loci. This novel supraspinal analgesic action of gabapentin was only obtained in ligated neuropathic mice, and gabapentin (i.p. and i.c.v.) did not affect acute thermal and mechanical nociception.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>In mice in which central NA levels were depleted by 6\u2010OHDA, the antihyperalgesic and antiallodynic effects of i.p. and i.c.v. gabapentin were strongly suppressed.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>The antihyperalgesic and antiallodynic effects of systemic gabapentin were reduced by both systemic and i.t. administration of yohimbine, an <jats:italic>\u03b1<\/jats:italic><jats:sub>2<\/jats:sub>\u2010adrenergic receptor antagonist. By contrast, prazosin (i.p. or i.t.), an <jats:italic>\u03b1<\/jats:italic><jats:sub>1<\/jats:sub>\u2010adrenergic receptor antagonist, did not alter the effects of gabapentin.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>It was concluded that the antihyperalgesic and antiallodynic effects of gabapentin are mediated substantially by the descending noradrenergic system, resulting in the activation of spinal <jats:italic>\u03b1<\/jats:italic><jats:sub>2<\/jats:sub>\u2010adrenergic receptors.<\/jats:p><\/jats:list-item>\n<\/jats:list>\n<\/jats:p><jats:p><jats:italic>British Journal of Pharmacology<\/jats:italic> (2005) <jats:bold>144<\/jats:bold>, 703\u2013714. doi:<jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"doi\" xlink:href=\"10.1038\/sj.bjp.0706109\">10.1038\/sj.bjp.0706109<\/jats:ext-link><\/jats:p>","DOI":"10.1038\/sj.bjp.0706109","type":"journal-article","created":{"date-parts":[[2005,1,27]],"date-time":"2005-01-27T16:01:08Z","timestamp":1106841668000},"page":"703-714","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":121,"title":["Role of descending noradrenergic system and spinal <i>\u03b1<\/i><sub>2<\/sub>\u2010adrenergic receptors in the effects of gabapentin on thermal and mechanical nociception after partial nerve injury in the mouse"],"prefix":"10.1111","volume":"144","author":[{"given":"Mitsuo","family":"Tanabe","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keiko","family":"Takasu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Noriyo","family":"Kasuya","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shinobu","family":"Shimizu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Motoko","family":"Honda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hideki","family":"Ono","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2009,1,29]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0304-3959(88)90198-4"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.280.21.1831"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.neuropharm.2003.11.010"},{"key":"e_1_2_6_5_1","first-page":"15","article-title":"The anticonvulsant, antihyperalgesic agent gabapentin is an agonist at brain \u03b3\u2010aminobutyric acid type B receptors negatively coupled to voltage\u2010dependent calcium channels","volume":"298","author":"BERTRAND S.","year":"2001","journal-title":"J. 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