2023 Fiscal Year Final Research Report
Sex differences in the development of cholesterol cholelithiasis
Project/Area Number |
19K07048
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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 47030:Pharmaceutical hygiene and biochemistry-related
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Research Institution | 湘南医療大学 (2021-2023) University of Shizuoka (2019-2020) |
Principal Investigator |
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Project Period (FY) |
2019-04-01 – 2024-03-31
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Keywords | 性差 / コレステロール胆石症 / 胆汁分泌 |
Outline of Final Research Achievements |
Cholesterol cholelithiasis is a disease caused by cholesterol stones resulting from an imbalance of bile lipid components, known to be more prevalent in women. Differences in cholesterol metabolism and bile secretion machinery may be factors contributing to the sex differences, but the details have not been elucidated. Here, we investigated the sex differences in the expression of molecules related to hepatic cholesterol metabolism and hepatobiliary excretion in mouse at the gene and protein levels. Additionally, biliary outputs of three bile lipids, i.e. cholesterol, phospholipids and bile acids, were also determined in male and female mouse. These results suggest that insufficient induction of canalicular Abcb11 protein expression resulted in the failure to increase the concentration of bile acids and subsequent cholesterol supersaturation in lithogenic diet-fed female mouse.
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Free Research Field |
生理学
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Academic Significance and Societal Importance of the Research Achievements |
個別化療法の進展に伴い、性別による発症率の違いや、それを考慮した治療戦略の開発が必要であるという認識は、近年急速に広まっている。中でも、コレステロール胆石症は出産経験のある40歳以降の女性が多く発症すると言われているが、なぜ発症率に性差があるのかに関してはいまだ不明な点が多く、解明すべき問題である。本研究では、コレステロール・胆汁酸の生合成系、および胆汁酸トランスポーターの機能性差が、胆石発症性差の要因である可能性を見出した。本研究の成果は、コレステロール胆石症の予防・治療における個別化医療を実現するための基盤となることが期待される。
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