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2020 Fiscal Year Final Research Report

Study of regulatory mechanisms of bone metabolism by equol enantiomers

Research Project

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Project/Area Number 19K24321
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0909:Sports sciences, physical education, health sciences, and related fields
Research InstitutionTokyo University of Agriculture

Principal Investigator

TANAKA Miori  東京農業大学, 応用生物科学部, 助教 (00845505)

Project Period (FY) 2019-08-30 – 2021-03-31
Keywordsエクオール / 骨代謝 / 破骨細胞 / 骨芽細胞 / 炎症 / アポトーシス / 骨粗鬆症
Outline of Final Research Achievements

The aim of this study was to compare the properties of equol enantiomers on osteoclast formation and underlying molecular mechanisms in vitro. We also investigated the comparative effects of equol enantiomers on bone fragility in OVX mice. In the cell experiments, we demonstrated that equol enantiomers inhibited osteoclast differentiation, and (S)-equol had a stronger effect than (R)-equol. Additionally, (S)-equol induced apoptosis of mature osteoclasts and osteoblast differentiation. In the animal experiments, (S)-equol suppressed bone loss and femoral osteoclastic gene expression in OVX mice. We also found that the concentrations of (S)-equol were clearly increased in serum, tibia, liver, and kidney compared to those of (R)-equol.

Free Research Field

食品機能学

Academic Significance and Societal Importance of the Research Achievements

エクオールと骨疾患の関連については複数の疫学研究、動物実験がなされているものの、先行研究は全てS体に着目しており、S体とR体の比較検討を行った研究はない。本研究では、エクオール鏡像異性体の骨疾患に対する有効性及び安全性を比較することを目的とし、さらに詳細な作用機序を明らかにすることで、食品因子による骨疾患予防・改善メカニズムに新たな知見をもたらすものと考える。要介護の主要因である骨疾患の予防を目指す新たな食生活スタイルを提案することは、QOL向上や医療費削減等にも繋がるため、社会的意義は非常に大きい。

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Published: 2022-01-27  

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