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Elucidation of the mechanism of pregnane X receptor-mediated aortic valve ectopic calcification and demonstration of its pathophysiological significance

Research Project

Project/Area Number 20K09117
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55030:Cardiovascular surgery-related
Research InstitutionHirosaki University

Principal Investigator

Daitoku Kazuyuki  弘前大学, 医学研究科, 教授 (50374822)

Co-Investigator(Kenkyū-buntansha) 瀬谷 和彦  弘前大学, 医学研究科, 助教 (40281919)
于 在強  弘前大学, 医学研究科, 助教 (40624268)
今泉 忠淳  弘前大学, 医学研究科, 教授 (90232602)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords異物受容体 / プレグナンX受容体 / テネイシンX / マトリックスGlaタンパク / 大動脈弁間質細胞 / 黄連解毒湯 / 大動脈弁石灰化 / 症候性大動脈弁狭窄症 / 重症大動脈弁狭窄症 / メノキナン-4 / Wnt5a / CD34陰性細胞 / 大動脈弁異所性石灰化 / 大動脈弁狭窄症 / 薬物療法
Outline of Research at the Start

(1)PXRを介する骨形成タンパク質(BMP2)発現の分子機構解明
ワルファリンやMK-4により活性化したPXRによるBMP2発現亢進の分子機構を明らかにし、大動脈弁異所性石灰化に寄与するタンパク質を明らかにする。
(2)PXRを介する大動脈弁異所性石灰化の病態生理学的意義
ラット大動脈弁を用いて加齢によるPXR発現の変化を調べ、細胞老化との関連を検討する。さらに、薬物開発を見据え、PXRを介する異所性石灰化の機能特異性や組織特異性を調べる。

Outline of Final Research Achievements

The role of CD34-negative cells in human aortic valve interstitial cells (HAVICs) obtained from the patient with aortic valve stenosis was investigated in terms of the inhibitory effect of orengetokuto as a drug candidate on valve calcification. TNF-α induced calcification of HAVICs under TNF-α action, but suppressed gene expression of CD34 and the extracellular matrix proteins tenascin X (TNX) and matrix Gla protein (MGP). Overexpression of CD34 suppressed TNF-α-induced calcification while maintaining TNX and MGP gene expression.
TNX expression was lower in CD34-negative cells compared to CD34-positive cells, suggesting a role for CD34 in suppressing HAVICs calcification by maintaining extracellular matrix protein expression. In addition, TNF-α-induced calcification in HAVICs was significantly inhibited under the action of orengetokuto and orengetokuto significantly suppressed elevated ALP and gene expression of BMP-2 gene.

Academic Significance and Societal Importance of the Research Achievements

大動脈弁狭窄症は大動脈弁の硬化により開閉が制限される病態で、発病率は高齢者で高く、重篤な場合には心不全に至る。弁異所性石灰化の非可逆的進行が特徴であり、有効な治療法は外科的大動脈弁置換術のみである。高侵襲で耐術困難症例が約20%存在するため、低侵襲の薬物治療法開発が急務となる。本研究は、異物受容体、PXRを介した弁異所性石灰化の分子機構やその病態生理学的意義を明らかにし、薬物治療への礎とすることを目的とする。本研究で弁特異的に石灰化に関わるタンパク質を同定し、薬物治療へ適用できれば、本疾患の進行抑制や早期発見・予防につながり、健康寿命の延伸等社会的意義がとみに大きいと考えられる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2023 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (4 results)

  • [Journal Article] Elucidation of the inhibitory effect of hopeaphenol on polynosinic- polycytidylic acid-induced innate immunity activation in human cerebral microvascular endothelial cells2022

    • Author(s)
      Xu L, Yu Z, Uesaka Y, Kawaguchi S, Kikuchi H, Daitoku K, MInakawa M, MOtomura S, Furukawa KI, Oshima Y, Seya K, Imaizumi T
    • Journal Title

      Journal of Pharmacological Sciences

      Volume: 149 Issue: 3 Pages: 147-157

    • DOI

      10.1016/j.jphs.2022.04.011

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Human aortic valve interstitial cells obtained from patients with aortic valve stenosis are vascular endothelial growth factor receptor 2 positive and contribute to ectopic calcification.2021

    • Author(s)
      Liu Xu、Yu Zaiqiang、Daitoku Kazuyuki、Fukuda Ikuo、Motomura Shigeru、Matsumiya Tomoh、Imaizumi Tadaatsu、Furukawa Ken-Ichi、Seya Kazuhiko
    • Journal Title

      Journal of Pharmacological Sciences

      Volume: 145 Issue: 2 Pages: 213-221

    • DOI

      10.1016/j.jphs.2020.12.002

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Orengedokuto inhibits TNF-α-induced HAVIC calcification obtained from calcific aortic valve stenosis patients2023

    • Author(s)
      Zaiqiang Yu, Kazuyuki Daitoku, Tadaatsu Imaizumi, Masahito Minakawa, Kazuhiko Seya
    • Organizer
      第97回日本薬理学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Inhibitory effect of CD34 on human aortic valve calcification2023

    • Author(s)
      Shihu Men, Zaiqiang Yu, Liu Xu, Kazuyuki Daitoku, Tadaatsu Imaizumi, Masahito Minakawa, Ken-Ichi Furukawa, Kazuhiko Seya
    • Organizer
      第97回日本薬理学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Orengetokuto inhibits aortic valve calcification: Confirming by animal model of SHR rat2023

    • Author(s)
      Zaiqiang Yu, Shihu Men, Kazuyuki Daitoku, Tadaatsu Imaizumi, Masahito Minakawa, Kazuhiko Seya
    • Organizer
      第53回日本心臓血管外科学会学術総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 大動脈弁異所性石灰化におけるWnt5aがは果たす役割の解析2020

    • Author(s)
      于在強、大徳和之、福田幾夫
    • Organizer
      日本胸部外科学会定期学術集会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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