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NMDA Suppresses Pancreatic ABCA1 Expression through the MEK/ERK/LXR Pathway in Pancreatic Beta Cells
https://kagawa-u.repo.nii.ac.jp/records/2000673
https://kagawa-u.repo.nii.ac.jp/records/20006739ce92a40-933e-4d4e-9253-2d24ac664269
| 名前 / ファイル | ライセンス | アクション |
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||||||||||
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| 公開日 | 2025-01-27 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | NMDA Suppresses Pancreatic ABCA1 Expression through the MEK/ERK/LXR Pathway in Pancreatic Beta Cells | |||||||||||||
| 言語 | en | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 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 | |||||||||||||
| 著者 |
佐伯, 岳信
× 佐伯, 岳信
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||
| 内容記述 | Dysfunction or loss of pancreatic β cells can cause insulin deficiency and impaired glucose regulation, resulting in conditions like type 2 diabetes. The ATP-binding cassette transporter A1 (ABCA1) plays a key role in the reverse cholesterol transport system, and its decreased expression is associated with pancreatic β cell lipotoxicity, resulting in abnormal insulin synthesis and secretion. Increased glutamate release can cause glucotoxicity in β cells, though the detailed mechanisms remain unclear. This study investigated the effect of N-methyl-D-aspartic acid (NMDA) on ABCA1 expression in INS-1 cells and primary pancreatic islets to elucidate the signaling mechanisms that suppress insulin secretion. Using Western blotting, microscopy, and biochemical analyses, we found that NMDA activated the mitogen-activated protein kinase (MEK)-dependent pathway, suppressing ABCA1 protein and mRNA expression. The MEK-specific inhibitor PD98059 restored ABCA1 promoter activity, indicating the involvement of the extracellular signal-regulated kinase (MEK/ERK) pathway. Furthermore, we identified the liver X receptor (LXR) as an effector transcription factor in NMDA regulation of ABCA1 transcription. NMDA treatment increased cholesterol and triglyceride levels while decreasing insulin secretion, even under high-glucose conditions. These effects were abrogated by treatment with PD98059. This study reveals that NMDA suppresses ABCA1 expression via the MEK/ERK/LXR pathway, providing new insights into the pathological suppression of insulin secretion in pancreatic β cells and emphasizing the importance of investigating the role of NMDA in β cell dysfunction. | |||||||||||||
| 言語 | en | |||||||||||||
| 学位名 | ||||||||||||||
| 言語 | ja | |||||||||||||
| 学位名 | 博士(医学) | |||||||||||||
| 学位授与機関 | ||||||||||||||
| 識別子Scheme | kakenhi | |||||||||||||
| 識別子 | 16201 | |||||||||||||
| 言語 | ja | |||||||||||||
| 機関名 | 香川大学 | |||||||||||||
| 言語 | en | |||||||||||||
| 機関名 | Kagawa University | |||||||||||||
| 学位授与年月日 | ||||||||||||||
| 学位授与年月日 | 2024-12-25 | |||||||||||||
| 学位授与番号 | ||||||||||||||
| 学位授与番号 | 甲第868号 | |||||||||||||
| 権利 | ||||||||||||||
| 言語 | en | |||||||||||||
| 権利情報 | © 2024 by the authors. Published by Nutrients. | |||||||||||||
| 権利 | ||||||||||||||
| 言語 | en | |||||||||||||
| 権利情報Resource | https://creativecommons.org/licenses/by/4.0/ | |||||||||||||
| 権利情報 | This is an open access article under the CC BY license. | |||||||||||||
| PubMed番号 | ||||||||||||||
| 関連タイプ | isReferencedBy | |||||||||||||
| 識別子タイプ | URI | |||||||||||||
| 関連識別子 | https://pubmed.ncbi.nlm.nih.gov/39275180/ | |||||||||||||
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| 関連タイプ | isVersionOf | |||||||||||||
| 識別子タイプ | DOI | |||||||||||||
| 関連識別子 | https://doi.org/10.3390/nu16172865 | |||||||||||||
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| 関連タイプ | hasVersion | |||||||||||||
| 識別子タイプ | URI | |||||||||||||
| 関連識別子 | https://pmc.ncbi.nlm.nih.gov/articles/PMC11396903/ | |||||||||||||
| 著者版フラグ | ||||||||||||||
| 出版タイプ | P | |||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_fa2ee174bc00049f | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | ABCA1 | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | LXR | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | NMDA | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | insulin secretion | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | pancreatic beta cells | |||||||||||||
| キーワード | ||||||||||||||
| 言語 | en | |||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | type 2 diabetes | |||||||||||||