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Fabrication of high-radiopaque drug-eluting microbeads for transarterial chemoembolization

Research Project

Project/Area Number 19K22068
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionTokai University

Principal Investigator

HASEBE Terumitsu  東海大学, 医学部, 教授 (20306799)

Co-Investigator(Kenkyū-buntansha) 堀田 篤  慶應義塾大学, 理工学部(矢上), 教授 (30407142)
松本 知博  東海大学, 医学部, 准教授 (30710983)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsマイクロビーズ / 生分解性 / X線視認性 / 肝動脈化学塞栓療法 / 生分解性ポリマー / TACE / DEB
Outline of Research at the Start

肝臓癌の治療法である肝動脈化学塞栓療法では、大腿動脈からカテーテルを肝動脈まで挿入し、抗癌剤溶出性の塞栓ビーズ (DEB) を注入することで腫瘍を壊死させる。治療はX線で透視しつつ実施されるが、DEB自体にはX線視認性がなく、塞栓状況の把握が困難である。DEBが意図しない血管を塞栓した際には、合併症の恐れがあるが、塞栓箇所をX線で確認できないために予測することが難しい。さらに、DEBは体内に永久残存するため、合併症のリスク増大も懸念される。以上より本研究では、油性造影剤と生分解性ポリマーであるポリ乳酸 (PLA) から新規DEBの作製し、X線視認性、生分解性、薬剤徐放特性を評価する。

Outline of Final Research Achievements

In this study, radiopaque/biodegradable microbeads for transarterial chemoembolization (TACE) were developed. The average diameter of the microbeads was approximately 190μm, which was within the target range of 100-700μm. To evaluate the visibility of the microbeads under X-ray irradiation (radiopacity), the CT value was measured to be about 6700 HU, which was confirmed to have excellent radiopacity compared to 15 HU of existing microbeads. In addition, the microbeads showed a mass loss of 18.2% in 40 days in phosphate buffer solution, which simulates in vivo conditions, and their biodegradability was confirmed.

Academic Significance and Societal Importance of the Research Achievements

TACEは、切除不能な肝臓癌に対して適応されるカテーテル治療法であり、腫瘍に栄養を供給している血管にカテーテルと呼ばれる数mmの細い管を挿入し、塞栓物質を注入して抗腫瘍効果を狙う。TACEはX線透視下で実施されるが、従来の塞栓物質はX線視認性がないために塞栓物質の注入コントロールが困難で、意図しない正常血管を塞栓して合併症を生じる場合がある。また、塞栓物質は体内で永久残存するために合併症が重篤化しやすい。本研究で開発したマイクロビーズはX線視認性と生分解性を兼ね備えた塞栓物質であり、より低侵襲なTACE治療を実現できる。

Report

(2 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (4 results)

All 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results) Patent(Industrial Property Rights) (2 results)

  • [Journal Article] Fabrication of radiopaque drug-eluting beads based on Lipiodol/biodegradable-polymer for image-guided transarterial chemoembolization of unresectable hepatocellular carcinoma2020

    • Author(s)
      Okamoto Yutaka、Hasebe Terumitsu、Bito Kenta、Yano Kosaku、Matsumoto Tomohiro、Tomita Kosuke、Hotta Atsushi
    • Journal Title

      Polymer Degradation and Stability

      Volume: 175 Pages: 109106-109106

    • DOI

      10.1016/j.polymdegradstab.2020.109106

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Development of radiopaque drug-eluting beads based on lipiodol/biodegradable-polymer for transarterial chemoembolization2021

    • Author(s)
      Terumitsu Hasebe, Yutaka Okamoto, Tomohiro Matsumoto, Kosuke Tomita, Shota Yamamoto, Shunsuke Kamei, Shunto Maegawa, Kenta Bito, Yutaka Imai, Atsushi Hotta
    • Organizer
      15th Annual Scientific Meeting of Asia Pacific Society of Cardiovascular and Interventional Radiology (APSCVIR) 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] 塞栓材及びそ の製造方法2021

    • Inventor(s)
      大山裕也、岡本穣、平賀魁、長谷部光泉、堀田篤
    • Industrial Property Rights Holder
      ドリームメディカルパートナーズ株式会社
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-032665
    • Filing Date
      2021
    • Related Report
      2020 Research-status Report
  • [Patent(Industrial Property Rights)] 塞栓材及びそ の製造方法2021

    • Inventor(s)
      長谷部光泉、岡本穣、尾藤健太、堀田篤
    • Industrial Property Rights Holder
      東海大学・慶應義塾大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-008824
    • Filing Date
      2021
    • Related Report
      2020 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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