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Lectin-like Oxidized Low-density Lipoprotein Receptor-1 (LOX-1)とAngiotensinⅡ type 1 Receptor (AT1R)の受容体連関に伴うミトコンドリアダイナミクス及びマイトファジーは血管老化に重要な役割を果たす
http://hdl.handle.net/10232/00031985
http://hdl.handle.net/10232/000319852b10b275-cfac-453c-8353-87e0b5396586
| 名前 / ファイル | ライセンス | アクション |
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Diss_内門_義博_ISK646_2021 (9.5 MB)
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Abstract_内門_義博_45418810057_2021 (39.4 kB)
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Result_Uchikado_Yoshihiro_isk_646 (5.8 MB)
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Comments_Uchikado_Yoshihiro_isk_646 (2.0 MB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2022-05-27 | |||||
| タイトル | ||||||
| タイトル | Association of Lectin-like Oxidized Low-density Lipoprotein Receptor-1 With Angiotensin II Type 1 Receptor Impacts Mitochondrial Quality Control, Offering Promise for the Treatment of Vascular Senescence | |||||
| タイトル言語 | en | |||||
| タイトル | ||||||
| タイトル | Lectin-like Oxidized Low-density Lipoprotein Receptor-1 (LOX-1)とAngiotensinⅡ type 1 Receptor (AT1R)の受容体連関に伴うミトコンドリアダイナミクス及びマイトファジーは血管老化に重要な役割を果たす | |||||
| タイトル言語 | ja | |||||
| 著者 |
内門, 義博
× 内門, 義博 |
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| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | mitochondrial dynamics | |||||
| キーワード | ||||||
| 主題言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | dynamin-related protein 1 | |||||
| キーワード | ||||||
| 主題言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | mitochondrial autophagy | |||||
| キーワード | ||||||
| 主題言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | angiotensin II type 1 receptor | |||||
| キーワード | ||||||
| 主題言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | oxidized low-density lipoprotein | |||||
| キーワード | ||||||
| 主題言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | senescence | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||
| 資源タイプ | doctoral thesis | |||||
| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Lectin-like oxidized low-density lipoprotein (ox-LDL) causes vascular senescence and atherosclerosis. It has been reported that ox-LDL scavenger receptor-1 (LOX-1) is associated with the angiotensin II type 1 receptor (AT1R). While mitochondria play a crucial role in the development of vascular senescence and atherosclerosis, they also undergo quality control through mitochondrial dynamics and autophagy. The aim of this study was to investigate (1) whether LOX-1 associates with AT1R, (2) if this regulates mitochondrial quality control, and (3) whether AT1R inhibition using Candesartan might ameliorate ox-LDL-induced vascular senescence. We performed in vitro and in vivo experiments using vascular smooth muscle cells (VSMCs), and C57BL/6 and apolipoprotein E-deficient (ApoE KO) mice. Administration of oxidized low-density lipoprotein (ox-LDL) to VSMCs induced mitochondrial dysfunction and cellular senescence accompanied by excessive mitochondrial fission, due to the activation of fission factor Drp1, which was derived from the activation of the Raf/MEK/ERK pathway. Administration of either Drp1 inhibitor, mdivi-1, or AT1R blocker candesartan attenuated these alterations. Electron microscopy and immunohistochemistry of the co-localization of LAMP2 with TOMM20 signal showed that AT1R inhibition also increased mitochondrial autophagy, but this was not affected by Atg7 deficiency. Conversely, AT1R inhibition increased the co-localization of LAMP2 with Rab9 signal. Moreover, AT1R inhibition-induced mitochondrial autophagy was abolished by Rab9 deficiency, suggesting that AT1R signaling modulated mitochondrial autophagy derived from Rab9-dependent alternative autophagy. Inhibition of the Raf/MEK/ERK pathway also decreased the excessive mitochondrial fission, and Rab9-dependent mitochondrial autophagy, suggesting that AT1R signaling followed the Raf/MEK/ERK axis modulated both mitochondrial dynamics and autophagy. The degree of mitochondrial dysfunction, reactive oxygen species production, vascular senescence, atherosclerosis, and the number of fragmented mitochondria accompanied by Drp1 activation were all higher in ApoE KO mice than in C57BL/6 mice. These detrimental alterations were successfully restored, and mitochondrial autophagy was upregulated with the administration of candesartan to ApoE KO mice. The association of LOX-1 with AT1R was found to play a crucial role in regulating mitochondrial quality control, as cellular/vascular senescence is induced by ox-LDL, and AT1R inhibition improves the adverse effects of ox-LDL. Yoshihiro Uchikado, Yoshiyuki Ikeda, Yuichi Sasaki, Masaaki Iwabayashi, Yuichi Akasaki and Mitsuru Ohishi Association of Lectin-Like Oxidized Low-Density Lipoprotein Receptor-1 With Angiotensin II Type 1 Receptor Impacts Mitochondrial Quality Control, Offering Promise for the Treatment of Vascular Senescence Frontiers in Cardiovascular Medicine 2021, 8, 788655 https://doi.org/10.3389/fcvm.2021.788655 |
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| 内容記述言語 | en | |||||
| 作成日 | ||||||
| 日付 | 2022-03-04 | |||||
| 日付タイプ | Collected | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| NDC | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 490 | |||||
| ファイル（説明） | ||||||
| 内容記述 | 博士論文全文, 博士論文要旨, 最終試験結果の要旨, 論文審査の要旨 | |||||
| 公開者・出版者 | ||||||
| 出版者 | Frontiers | |||||
| 出版者言語 | en | |||||
| 公開者・出版者 | ||||||
| 出版者 | 鹿児島大学 | |||||
| 出版者言語 | ja | |||||
| 備考 | ||||||
| 備考言語 | ja | |||||
| 備考 | 【指導教員:大石充】 | |||||
| date.appl | ||||||
| appl | 【学位申請日】2021-12-01 | |||||
| 学位名 | ||||||
| 学位名の言語 | ja | |||||
| 学位名 | 博士(医学) | |||||
| 学位名 | ||||||
| 学位名の言語 | en | |||||
| 学位名 | Doctor of Philosophy in Medical Science | |||||
| 学位授与機関名 | ||||||
| 学位授与機関識別子Scheme | kakenhi | |||||
| 学位授与機関識別子 | 17701 | |||||
| 学位授与機関名の言語 | ja | |||||
| 学位授与機関名 | 鹿児島大学 | |||||
| 学位授与年月日 | ||||||
| 学位授与年月日 | 2022-03-11 | |||||
| 学位授与番号 | ||||||
| 学位授与番号 | 甲総研第646号 | |||||
