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"subitem_description_type": "Other"}, {"subitem_description": "\u8981\u7d04(\u6b27\u6587):(1) Although intra hecal (IT) morphine after a short interval of aortic occlusion in a rodent model induced transient spastic paraparesis via opioid receptor-coupled effects in spinal cord, investigations on the relationship between the activation of opioid receptor subtypes and neurological function after spinal cord ischemia have not been reported. To determine the role of these opioid receptors in spinal mechanisms of motor dysfunction after spinal cord ischemia we investigated whether IT administration of various opioid receptor agonists can induce paraparesis after a noninjurious interval of spinal cord ischemia in rats. In Sprague-Dawley rats implanted with an IT catheter, spinal cord ischemia was induced for 6 min using an intraaortic balloon. Mu ([D-Ala^2, N-Me Phe^4, Gly-ol^5] enkephalin), kappa (U50488H) or delta (p-Pen^\u003c2,5\u003e] enkephalin) agonist was injected intrathecally at 30 min after reflow. A separate group of animals was used to investigate the dose-response effect on this motor dysfunction. For this purpose, three doses of mu, kappa, or delta agonist were injected intrathecally after ischemia. After IT injection, recovery of motor function was assessed periodically using the motor deficit index (0 = complete recovery; 6 = complete paraplegia). IT administration of mu and delta but not kappa agonists produced dose-dependent effects in induction of spastic paraparesis in the rat. In addition, this spasticity induced by IT mu and delta agonists was reversed completely by IT naloxone and naltrindole, respectively. These results suggested that the effect of various opioids on motor function after a noninjurious interval of spinal cord ischemia depends upon individual opioid receptor subtypes. (2) The purpose of this study is to investigate the interaction between K+ATP channel opener (nicorandil) and morphine on motor function after non-injurious interval of spinal cord ischemia in the rat. Spinal ischemia was induced by aortic occlusion for 6 min with a balloon catheter in Sprague-Dawley rats. All animals received intrathecal injection of morphine (1-60 \u03bcg) 1 h after ischemia. In addition to the intrathecal injection of morphine, group M (control animals), group MN (combination of morphine and nicorandil), and group MNG (combination of morphine, nicorandil, and glibenclamide) received intrathecal saline, nicorandil (10 \u03bcg) and both glibenclamide (10 \u03bcg) and nicorandil (10 \u03bcg) after 150 min of reperfusion, respectively. The quintal bioassay for the effect of intrathecal morphine on neurological function after ischemia was performed to calculate 50% effective dose values (ED_\u003c50\u003e) for inducing paraparesis at 3 h of reperfusion. The ED_\u003c50\u003e in the group M and group MN was 15.1\u00b1 4.9 \u03bcg and 2.9\u00b1 1.0 \u03bcg of IT morphine respectively (p \u003c 0.05). In Group MNG, the dose-response curve shifted back to the right and the ED_\u003c50\u003e for inducing paraparesis was 11.6 \u00b1 4.7 \u03bcg of IT morphine. The present study suggests that intrathecal low dose morphine combined with nicoranil could induce spastic paraparesis after non-injurious interval of spinal cord ischemia in the rat.", "subitem_description_type": "Other"}, {"subitem_description": "\u672a\u516c\u958b\uff1aP.5\u4ee5\u964d(\u5225\u5237\u8ad6\u6587\u306e\u305f\u3081)", "subitem_description_type": "Other"}, {"subitem_description": "\u7814\u7a76\u5831\u544a\u66f8", "subitem_description_type": "Other"}]}, "item_1617186643794": {"attribute_name": "Publisher", "attribute_value_mlt": [{"subitem_1522300295150": "ja", "subitem_1522300316516": "\u57a3\u82b1\u5b66"}]}, "item_1617186702042": {"attribute_name": "Language", "attribute_value_mlt": [{"subitem_1551255818386": "eng"}]}, "item_1617186783814": {"attribute_name": "Identifier", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", "subitem_identifier_uri": "http://hdl.handle.net/20.500.12000/13992"}]}, "item_1617186920753": {"attribute_name": "Source Identifier", "attribute_value_mlt": [{"subitem_1522646500366": "NCID", "subitem_1522646572813": "BA82699598"}]}, "item_1617258105262": {"attribute_name": "Resource Type", "attribute_value_mlt": [{"resourcetype": "research report", "resourceuri": "http://purl.org/coar/resource_type/c_18ws"}]}, "item_1617265215918": {"attribute_name": "Version Type", "attribute_value_mlt": [{"subitem_1522305645492": "VoR", "subitem_1600292170262": "http://purl.org/coar/version/c_970fb48d4fbd8a85"}]}, "item_1617605131499": {"attribute_name": "File", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "download_preview_message": "", "file_order": 0, "filename": "16591551.pdf", "future_date_message": "", "is_thumbnail": false, "mimetype": "", "size": 0, "url": {"objectType": "fulltext", "url": "https://u-ryukyu.repo.nii.ac.jp/record/2005150/files/16591551.pdf"}, "version_id": "256763b3-1c32-4f7b-84b4-8335b3093fd7"}]}, "item_title": "\u975e\u969c\u5bb3\u6027\u77ed\u6642\u9593\u810a\u9ac4\u865a\u8840\u5f8c\u30e2\u30eb\u30d2\u30cd\u8a98\u767a\u75d9\u6027\u5bfe\u9ebb\u75fa\u306e\u767a\u751f\u6a5f\u5e8f\u306b\u95a2\u3059\u308b\u5206\u5b50\u751f\u7269\u5b66\u7684\u691c\u8a0e", "item_type_id": "15", "owner": "1", "path": ["1642838403123", "1642838407795"], "permalink_uri": "http://hdl.handle.net/20.500.12000/13992", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2009-12-16"}, "publish_date": "2009-12-16", "publish_status": "0", "recid": "2005150", "relation": {}, "relation_version_is_last": true, "title": ["\u975e\u969c\u5bb3\u6027\u77ed\u6642\u9593\u810a\u9ac4\u865a\u8840\u5f8c\u30e2\u30eb\u30d2\u30cd\u8a98\u767a\u75d9\u6027\u5bfe\u9ebb\u75fa\u306e\u767a\u751f\u6a5f\u5e8f\u306b\u95a2\u3059\u308b\u5206\u5b50\u751f\u7269\u5b66\u7684\u691c\u8a0e"], "weko_shared_id": -1}