2022 Fiscal Year Final Research Report
Molecular mechanism of the LRP1-mediated export of beta-amyloid from brain by molecular motor KIF13B
Project/Area Number |
20K07739
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 51030:Pathophysiologic neuroscience-related
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Research Institution | Wakayama Medical University |
Principal Investigator |
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Keywords | アルツハイマー病 / 毛細血管 / 高脂血症 / 動脈硬化 / エストロゲン / 中性脂肪 / 胃 / βアミロイド |
Outline of Final Research Achievements |
We conducted basic research on Alzheimer's disease (AD) focusing on brain capillaries. Initially, we attempted to elucidate the mechanism by which brain capillaries export β-amyloid from the brain into the blood, but this proved to be technically difficult. When women reach menopause, blood fat rises and the risk of arteriosclerosis and AD increases. Therefore, we examined gastric estrogen, which was discovered by the previous professor, and found that gastric estrogen has the effect of lowering the elevated blood fat. Furthermore, we found that brain capillaries deficient in estrogen receptors showed reduced repair capacity when damaged, suggesting that gastric estrogen has an inhibitory effect on AD by regulating blood fat concentration and supporting capillary repair.
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Free Research Field |
内分泌
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Academic Significance and Societal Importance of the Research Achievements |
エストロゲンは食欲、脂肪の合成・血中への放出を抑制し、脂肪の蓄積・消費を促進することが知られている。私達は今回の結果と合わせて「血中脂肪値が上がると胃から分泌されるエストロゲンが増えて下げる」というモデルを提唱した。エストロゲンには傷害された脳毛細血管の修復を支える機能があることもわかり、閉経後にADリスクが上がるのは「血中エストロゲンの低下が血中脂肪を高めて動脈硬化を引き起こすとともに毛細血管の修復機能を低下させ、脳毛細血管を介したβアミロイドの脳から血中への排出の低下の原因となり、ADのリスクを増大させる」ことが示唆された。今後、胃エストロゲンを活用したAD予防の開発が期待される。
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