{"created":"2023-06-19T11:43:47.020113+00:00","id":13459,"links":{},"metadata":{"_buckets":{"deposit":"9c489306-7ec5-4ea7-8683-28cf5dc12167"},"_deposit":{"created_by":16,"id":"13459","owners":[16],"pid":{"revision_id":0,"type":"depid","value":"13459"},"status":"published"},"_oai":{"id":"oai:mie-u.repo.nii.ac.jp:00013459","sets":["334:608:618:1214"]},"author_link":[],"item_7_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2020-03-25","bibliographicIssueDateType":"Issued"}}]},"item_7_date_granted_59":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2020-03-25"}]},"item_7_degree_grantor_57":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"三重大学"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"14101","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_7_degree_name_56":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士(医学)"}]},"item_7_description_14":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_7_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Background: Impaired lumbar artery flow has been reported in clinical and epidemiological studies to be associated with low back pain and lumbar disc degeneration. However, it has not been experimentally demonstrated that impaired lumbar artery flow directly induces intervertebral disc (IVD) degeneration by affecting IVD matrix metabolism. The purpose of this study was to evaluate whether ligation of the lumbar artery can affect degenerative changes in the rabbit IVD.\nMethods: New Zealand White rabbits (n = 20) were used in this study. Under general anesthesia, the third and fourth lumbar arteries were double-ligated using vascular clips. The blood flow to the L3/L4 disc (cranial disc) was reduced by ligation of the third lumbar artery and that of the L5/L6 disc (caudal disc) by ligation of the fourth lumbar artery. The blood flow to the L4/L5 disc (bilateral disc) was decreased by ligation of both the third and fourth lumbar arteries. The L2/L3 disc was used as the control. Disc height was radiographically monitored biweekly until 12 weeks after surgery. The rabbits were sacrificed at 4, 8, and 12 weeks after surgery and magnetic resonance imaging (MRI) T2-mapping, histology and immunohistochemistry were assessed.\nResults: Lumbar artery ligation did not induce significant changes in disc height between control and ischemic discs (cranial, bilateral and caudal discs) during the 12-week experimental period. T2-values of ischemic discs had no significant trend to be lower than those of the control L2/L3 discs. Histologically, Safranin-O staining changed following ligation of corresponding IVD lumbar arteries. Histological grading scores for disc degeneration, which correlated significantly with MRI T2-values, had significant changes after the surgery. Immunohistochemical analysis showed that the ligation of lumbar arteries significantly affected a change in the percentage of HIF-1α immunoreactive cells of ischemia discs compared to that of control discs four weeks after the surgery (p < 0.05).\nConclusions: The MRI and histology results suggest that diminished flow in lumbar arteries induce mild changes in the extracellular matrix metabolism of rabbit IVDs. These matrix changes, however, were not progressive and differed from the degenerative disc changes seen in the process of human IVD degeneration.\n","subitem_description_type":"Abstract"}]},"item_7_description_5":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"本文/Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie 514-8507, Japan","subitem_description_type":"Other"},{"subitem_description":"14p","subitem_description_type":"Other"}]},"item_7_dissertation_number_60":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"乙医学第1048号"}]},"item_7_publisher_30":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"三重大学"}]},"item_7_relation_11":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1186/s12891-019-2721-y","subitem_relation_type_select":"DOI"}}]},"item_7_text_31":{"attribute_name":"出版者（ヨミ）","attribute_value_mlt":[{"subitem_text_value":"ミエダイガク"}]},"item_7_text_63":{"attribute_name":"ノート","attribute_value_mlt":[{"subitem_text_value":"BMC Musculoskeletal Disorders (2019) 20:347に掲載"}]},"item_7_text_65":{"attribute_name":"資源タイプ（三重大）","attribute_value_mlt":[{"subitem_text_value":"Doctoral Dissertation / 博士論文"}]},"item_7_version_type_15":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Imanishi, Takao","creatorNameLang":"en"},{"creatorName":"イマニシ, タカオ","creatorNameLang":"ja-Kana"},{"creatorName":"今西, 隆夫","creatorNameLang":"ja"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-06-09"}],"displaytype":"detail","filename":"2019DM0326.pdf","filesize":[{"value":"3.0 MB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"label":"2019DM0326","objectType":"fulltext","url":"https://mie-u.repo.nii.ac.jp/record/13459/files/2019DM0326.pdf"},"version_id":"53920500-a302-49dd-ba7d-babecfbf106a"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Intervertebral disc","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Lumbar artery","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Disc degeneration","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"MRI T2-mapping","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Rabbit","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"Effect of diminished flow in rabbit lumber arteries on intervertebral disc matrix changes using MRI T2-mapping and histology","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Effect of diminished flow in rabbit lumber arteries on intervertebral disc matrix changes using MRI T2-mapping and histology","subitem_title_language":"en"}]},"item_type_id":"7","owner":"16","path":["1214"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2020-06-09"},"publish_date":"2020-06-09","publish_status":"0","recid":"13459","relation_version_is_last":true,"title":["Effect of diminished flow in rabbit lumber arteries on intervertebral disc matrix changes using MRI T2-mapping and histology"],"weko_creator_id":"16","weko_shared_id":-1},"updated":"2023-10-26T00:45:30.096998+00:00"}