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2021 Fiscal Year Final Research Report

The development of bioresorbable arterial graft that promote the vascular remodeling by macrophage infiltration from the outside of the graft

Research Project

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Project/Area Number 19K09279
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 InstitutionNippon Medical School

Principal Investigator

Miyachi Hideki  日本医科大学, 医学部, 助教 (90386235)

Co-Investigator(Kenkyū-buntansha) 中澤 靖元  東京農工大学, 工学(系)研究科(研究院), 教授 (20456255)
大石 由美子  日本医科大学, 大学院医学研究科, 大学院教授 (80435734)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords生体吸収性動脈グラフト / 血管リモデリング / 細胞浸潤性試験 / 血管再生 / 生体吸収材料
Outline of Final Research Achievements

In bioresorbable arterial graft, the vascular structure needs to be regenerated before the bioresorbable material is absorbed completely. We developed a bilayer graft with a sponge inner layer to promote cell infiltration and an electrospun outer layer to endure arterial pressure. In vitro studies revealed that sheets with pore sizes of 2um and 10um showed inadequate cell infiltration, while sheets with 20um were technically difficult to fabricate. The ideal bilayered graft was difficult to create using this method. In the future, grafts with a hierarchical structure with different absorption periods will be prepared.

Free Research Field

循環器学

Academic Significance and Societal Importance of the Research Achievements

理想的な生体吸収性動脈グラフトはいまだ開発途上であり、二層性グラフトはグラフト外側からの細胞浸潤に着目した点で血管再生を促進する可能性が考えられた。しかし理想的な細胞浸潤と耐圧性を得るための二層性グラフトは技術的に困難であった。このことから今後は階層構造を持ったグラフトの作成を行っていくこととした。今回の実験からより理想的なグラフト作製への道筋が一つ開けた可能性がある。

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Published: 2023-01-30  

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