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2018 Fiscal Year Final Research Report

Physiological role of dehydroepiandrosterone

Research Project

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Project/Area Number 16K09806
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Endocrinology
Research InstitutionKanagawa Dental College

Principal Investigator

Aoki Kazutaka  神奈川歯科大学, 大学院歯学研究科, 教授 (60336542)

Co-Investigator(Kenkyū-buntansha) 寺内 康夫  横浜市立大学, 医学研究科, 教授 (40359609)
Research Collaborator SATO haruhiro  
Project Period (FY) 2016-04-01 – 2019-03-31
KeywordsDHEA / DHEA-S / 糖尿病
Outline of Final Research Achievements

In an insulin tolerance test, dehydroepiandrosterone (DHEA) and DHEA-S administration decreased the initial plasma glucose levels in the db/db mice, but they did not decrease the ratios to the basal blood glucose level.
DHEA increased Akt phosphorylation in the liver of C57B6,insulin receptor substrate (IRS)1- and IRS2-deficient mice fed a high fat diet, suggesting that the increase in Akt signaling induced by DHEA is sufficient in the presence of IRS1 or IRS2. DHEA and DHEA-S did not increase Akt phosphorylation in the primary hepatocytes of C57B6 mice.

Free Research Field

内分泌・糖尿病

Academic Significance and Societal Importance of the Research Achievements

副腎アンドロゲンであるDHEAには抗糖尿病作用があるが、その詳細は不明であるため、マウスを用いて肝臓の糖代謝を中心に検討を行った。DHEAは、随時血糖値を改善させたが、インスリン低血糖試験では、インスリン感受性の改善を認めなかった。遺伝子欠損マウスを用いた検討で、DHEAは肝臓のインスリン感受性を亢進させ、これには少なくともIRS-1またはIRS-2のどちらかが存在すればよいことが明らかとなった。

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Published: 2020-03-30  

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