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2022 Fiscal Year Final Research Report

Basic research for development of hemorrhagic complication therapeutic drug by long-term use of mechanical circulation

Research Project

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Project/Area Number 19K12772
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionAsahikawa Medical College (2020-2022)
Tohoku University (2019)

Principal Investigator

Inoue Yusuke  旭川医科大学, 医学部, 准教授 (80611079)

Co-Investigator(Kenkyū-buntansha) 早川 正樹  奈良県立医科大学, 医学部, 助教 (30516729)
深谷 碧  東北文化学園大学, 工学部, 助教 (20826060)
山田 昭博  東北大学, 加齢医学研究所, 助教 (40781448)
Project Period (FY) 2019-04-01 – 2023-03-31
KeywordsVWF / 出血合併症 / ECMO / PCPS / LVAD / 遠心ポンプ / ADAMTS13
Outline of Final Research Achievements

Acquired von Willebrand syndrome (AVWS) is thought to be the cause of bleeding complications that can occur after several years of use of an artificial heart. It is believed that high shear of the blood pump leads to excessive cleavage of von Willebrand factor (VWF), resulting in bleeding. The purpose of this study was to elucidate the mechanism of action of this bleeding complication. We constructed an evaluation system with minimal disturbance and reproduced AVWS in vitro by injecting fresh human blood into an auxiliary circulatory system. Next, drug effects were measured and effective drug concentrations were identified.

Free Research Field

医用生体工学

Academic Significance and Societal Importance of the Research Achievements

抗凝固が正しく管理されているにもかかわらず機械循環の使用例において数年以上の長期使用においては原因不明の出血が生じることがあり、問題視されてきた。その主因は後天性von Willebrand 症候群(AVWS)と考えられており、血液ポンプの回転駆動よって発生した高せん断によりvon Willebrand因子(VWF)が過剰に切断され、出血に至る。我々はVWFの切断を抑制し、出血を生じさせない薬剤の開発のために、外乱が最も少ない試験系を構築することに成功した。本試験系によって得られた知見を元に生体によって評価しAVWS治療薬剤開発のための大きな成果を得た。

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Published: 2024-01-30  

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