{"created":"2024-12-18T02:13:10.779903+00:00","id":2001113,"links":{},"metadata":{"_buckets":{"deposit":"acf1d197-3a1b-46bf-a408-8375e13aaf8b"},"_deposit":{"created_by":15,"id":"2001113","owner":"15","owners":[15],"pid":{"revision_id":0,"type":"depid","value":"2001113"},"status":"published"},"_oai":{"id":"oai:mie-u.repo.nii.ac.jp:02001113","sets":["334:608:618:1721969789237"]},"author_link":[],"control_number":"2001113","item_7_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2024-09-25","bibliographicIssueDateType":"Issued"}}]},"item_7_date_granted_59":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2024-09-25"}]},"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":"Myricetin (MYR), found in tea and berries, may have preventive effects on diseases, including Alzheimer's disease and cancer. However, MYR is also a mutagen, inducing DNA damage in the presence of metal ions. We have studied the molecular mechanisms of DNA damage by MYR in the presence of Cu(II) (MYR+Cu). Using ³²P-5'-end-labeled DNA fragments, we analyzed site-specific DNA damage caused by MYR+Cu. MYR+Cu caused concentration-dependent DNA strand breaks and base alterations, leading to cleavage of DNA at thymine, cytosine, and guanine nucleotides. Formation of the oxidative DNA damage indicator, 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG), in calf thymus DNA was increased by MYR+Cu. The production of 8-oxodG in MYR-treated HL-60 cells was significantly higher than in HP100 cells, which are more resistant to H₂O₂ than are HL-60 cells. Reactive oxygen species (ROS) scavengers were used to elucidate the mechanism of DNA damage. DNA damage was not inhibited by typical free hydroxyl radical (•OH) scavengers such as ethanol, mannitol, or sodium formate. However, methional, catalase, and bathocuproine inhibited DNA damage induced by MYR+Cu. These results suggest that H₂O₂, Cu(I), and ROS other than •OH are involved in MYR+Cu-induced DNA damage. We conclude that the Cu(I)/Cu(II) redox cycle and concomitant H₂O₂ production via autoxidation of MYR generate a complex of H₂O₂ and Cu(I), probably Cu(I)-hydroperoxide, which induces oxidative DNA damage.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_7_description_5":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"本文/Department of Environmental and Molecular Medicine, Mie University Graduate School of Medicine, Tsu, Mie, Japan","subitem_description_type":"Other"},{"subitem_description":"8p","subitem_description_type":"Other"}]},"item_7_dissertation_number_60":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲医学第2283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":"10.1016/j.mrgentox.2023.503694","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":"Mutation Research/Genetic Toxicology and Environmental Mutagenesis Volume 891, October 2023, 503694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_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":"平生, 祐一郎","creatorNameLang":"ja"},{"creatorName":"ヒラオ, ユウイチロウ","creatorNameLang":"ja-Kana"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2024-12-18"}],"filename":"2024DM0914.pdf","filesize":[{"value":"4 MB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"label":"2024DM0914.pdf","objectType":"fulltext","url":"https://mie-u.repo.nii.ac.jp/record/2001113/files/2024DM0914.pdf"},"version_id":"033ec488-b2b1-4106-b95f-f5f2fb24b09f"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"8-oxo-7","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"8-dihydro-2′-deoxyguanosine","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Mutagen","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Pharmacological activity","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Phenolic compound","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Pro-oxidant","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":"Myricetin causes site-specific DNA damage via reactive oxygen species generation by redox interactions with copper ions","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Myricetin causes site-specific DNA damage via reactive oxygen species generation by redox interactions with copper ions","subitem_title_language":"en"}]},"item_type_id":"7","owner":"15","path":["1721969789237"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2024-12-18"},"publish_date":"2024-12-18","publish_status":"0","recid":"2001113","relation_version_is_last":true,"title":["Myricetin causes site-specific DNA damage via reactive oxygen species generation by redox interactions with copper ions"],"weko_creator_id":"15","weko_shared_id":-1},"updated":"2024-12-18T02:29:03.380912+00:00"}