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2022 Fiscal Year Final Research Report

The Pathogenesis of pulmonary arterial hypertension via aryl hydrocarbon receptor

Research Project

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Project/Area Number 20H03682
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 53020:Cardiology-related
Research InstitutionNational Cardiovascular Center Research Institute

Principal Investigator

Nakaoka Yoshikazu  国立研究開発法人国立循環器病研究センター, 研究所, 部長 (90393214)

Co-Investigator(Kenkyū-buntansha) 小迫 英尊  徳島大学, 先端酵素学研究所, 教授 (10291171)
Project Period (FY) 2020-04-01 – 2023-03-31
Keywords肺高血圧症 / 肺動脈性肺高血圧症 / アリルハイドロカーボン受容体 / Th17細胞 / IL-21 / 炎症
Outline of Final Research Achievements

Pulmonary arterial hypertension (PAH) is a severe disease which causes stenosis and occlusion in the pulmonary small arteries and arterioles, leading to elevation of pulmonary arterial pressure and eventually to right-sided heart failure. Current therapeutic drugs for PAH are vasodilators only, and the patients with advanced PAH have still poor prognosis. Therefore, development of a novel therapeutic drug other than vasodilators has been awaited. Aryl hydrocarbon receptor (AHR), a nuclear receptor/transcription factor, detoxifies xenobiotics and regulates the differentiation and function of various immune cells. In this study, we demonstrated that AHR is an essential transcription factor for the pathogenesis of PAH using several PAH rat models and human specimens. These results suggest that AHR is a novel therapeutic target for PAH.

Free Research Field

循環器内科学

Academic Significance and Societal Importance of the Research Achievements

肺動脈性肺高血圧症(Pulmonary Arterial Hypertension:PAH)は肺動脈に原因不明の狭窄・閉塞を来して肺動脈圧の上昇から右心不全に至り、内科的治療に不応の場合は未だ予後不良の指定難病である。PAH治療に使用可能な血管拡張薬には限界があるため、新規メカニズムに基づく創薬が待たれている。 本研究では、免疫シグナルに着目し、PAHに関与する新規メカニズムとして芳香族炭化水素受容体AHRを同定しその下流シグナルを明かにした。即ち、動物モデル、ヒト検体の解析から、AHRがPAH病態形成の鍵を握り、AHRとその下流分子がPAHの新規創薬ターゲットとなり得ることを示した。

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Published: 2024-01-30  

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