• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Elucidation of the Mechanism of Rejection after Liver Transplantation by Epitope Analysis of HLA

Research Project

Project/Area Number 20K22950
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0905:Surgery of the organs maintaining homeostasis and related fields
Research InstitutionKyoto University

Principal Investigator

Yao Siyuan  京都大学, 医学研究科, 客員研究員 (70881944)

Project Period (FY) 2020-09-11 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsHLA / 生体肝移植 / 抗体関連拒絶 / donor specific antigen / エピトープ / 肝移植
Outline of Research at the Start

①HLAエピトープ解析のため肝移植症例のドナーとレシピエントの保存血液検体からHLA-A,B,C,DR,DQ,DP6座のアレルタイピングを実施する。②対象症例の臨床情報(抗体関連拒絶発症、抗ドナーHLA抗体産生および予後)を患者カルテから収集し、コンピュータソフトウェアを用いたエピトープ解析から得られた情報と合わせて、ミスマッチエピトープの拒絶発症や予後との関連を検討し、免疫原性の高いエピトープを同定する。即ち、本研究では患者検体を含む臨床データを用いて免疫原性の高いエピトープを同定することで、移植前の拒絶リスクを層別化でき、さらにはエピトープ自体を治療標的候補とすることが可能になると考える。

Outline of Final Research Achievements

Based on the liver transplant database, we retrospectively examined the correlation between HLA epitope matching between donors and recipients, and DSA incidence. The incidence of DSA gradually increased with years of transplantation. The fibrosis of the liver graft also progressed slowly over a long period of time. This study reaffirmed the strong need for prevention of DSA and development of therapeutic strategies for antibody-mediated rejection.
The number of mismatched HLA epitopes correlated with the occurrence of DSA. However, there were cases in which DSA did not occur even though the epitope mismatched load was high, and cases in which DSA did occur even though the epitope mismatched load was low.

Academic Significance and Societal Importance of the Research Achievements

臓器移植後の拒絶、特にドナー特異的抗体(donor-specific antibody: DSA)を伴う抗体関連拒絶は今も難治である。HLAエピトープ多型という新規バイオマーカーに基づき肝移植後の拒絶(特に抗体関連拒絶)を予測し、各移植における免疫抑制療法の強化・減量に有用な情報を現場に提供する。複数のドナー・レシピエント候補の中からハイリスク症例の回避にもつながる。それによって拒絶反応や合併症の危険性が軽減され、移植患者の生命予後のみならずQOLが向上すると期待できる。

Report

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

    (14 results)

All 2021 2020

All Journal Article (9 results) (of which Peer Reviewed: 8 results) Presentation (5 results)

  • [Journal Article] Muscularity Defined by the Combination of Muscle Quantity and Quality is Closely Related to Both Liver Hypertrophy and Postoperative Outcomes Following Portal Vein Embolization in Cancer Patients2021

    • Author(s)
      Yao Siyuan、Kamo Naoko、Taura Kojiro、Miyachi Yosuke、Iwamura Sena、Hirata Masaaki、Kaido Toshimi、Uemoto Shinji
    • Journal Title

      Annals of Surgical Oncology

      Volume: 29 Issue: 1 Pages: 301-312

    • DOI

      10.1245/s10434-021-10525-w

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ASO Author Reflections: Muscularity Affects Morphological and Functional Recovery of Liver; Clinical Phenomenon was Proven, but Mechanism is Yet to Be Proven2021

    • Author(s)
      Yao Siyuan、Kamo Naoko
    • Journal Title

      Annals of Surgical Oncology

      Volume: 29 Issue: 1 Pages: 313-314

    • DOI

      10.1245/s10434-021-10631-9

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analyses Focused on Organisms Would Enhance the Value of Detecting Occult Bacteremia2021

    • Author(s)
      Siyuan Yao, Shintaro Yagi
    • Journal Title

      Journal of American College of Surgeon

      Volume: 印刷中 Issue: 1 Pages: 161-162

    • DOI

      10.1016/j.jamcollsurg.2021.03.031

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pretransplant Body Composition Abnormality Has a Negative Impact Especially on Living Donor Liver Transplantation2021

    • Author(s)
      Shinya Okumura, Shintaro Yagi, Yuhei Hamaguchi, Yuji Yoshioka, Siyuan Yao, Naoko Kamo, Kojiro Taura, Toshimi Kaido, Shinji Uemoto
    • Journal Title

      Transplantation

      Volume: 105 Issue: 3 Pages: e37-e38

    • DOI

      10.1097/tp.0000000000003562

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Visceral adiposity is an independent risk factor for high intra-operative blood loss during living-donor liver transplantation; could preoperative rehabilitation and nutritional therapy mitigate that risk?2021

    • Author(s)
      Macshut Mahmoud、Kaido Toshimi、Yao Siyuan、Miyachi Yosuke、Sharshar Mohamed、Iwamura Sena、Hirata Masaaki、Shirai Hisaya、Kamo Naoko、Yagi Shintaro、Uemoto Shinji
    • Journal Title

      Clinical Nutrition

      Volume: 40 Issue: 3 Pages: 956-965

    • DOI

      10.1016/j.clnu.2020.06.023

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] 総特集 消化器・一般外科手術における感染対策・周術期管理 Ⅱ.各論 4)成人生体肝移植における感染対策・周術期管理2020

    • Author(s)
      姚 思遠、八木 真太郎、加茂 直子、佐藤 朝日、海道 利実、上本 伸二
    • Journal Title

      手術

      Volume: 74 Issue: 12 Pages: 1721-1729

    • DOI

      10.18888/op.0000001939

    • ISSN
      0037-4423
    • Year and Date
      2020-11-15
    • Related Report
      2020 Research-status Report
  • [Journal Article] Donor‐dominant one‐way matching of human leukocyte antigen‐A/B/DR alleles predicts graft‐versus‐host disease following living donor liver transplantation2020

    • Author(s)
      Hirata Masaaki、Yagi Shintaro、Shindo Takero、Yoshizawa Atsushi、Kiguchi Gozo、Kaneshiro Masakatsu、Yurugi Kimiko、Miyachi Yosuke、Iwamura Sena、Yao Siyuan、Uemoto Shinji
    • Journal Title

      Hepatology Research

      Volume: 51 Issue: 1 Pages: 135-148

    • DOI

      10.1111/hepr.13579

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Liver transplantation in patients with portal vein thrombosis: A strategic road map throughout management2020

    • Author(s)
      Sharshar Mohamed、Yagi Shintaro、Iida Taku、Yao Siyuan、Miyachi Yosuke、Macshut Mahmoud、Iwamura Sena、Hirata Masaaki、Ito Takashi、Hata Koichiro、Taura Kojiro、Okajima Hideaki、Kaido Toshimi、Uemoto Shinji
    • Journal Title

      Surgery

      Volume: 168 Issue: 6 Pages: 1160-1168

    • DOI

      10.1016/j.surg.2020.07.023

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Etiology of Liver Steatosis Influences the Severity of Ischemia/Reperfusion Injury and Survival After Liver Transplantation in Rats2020

    • Author(s)
      Miyachi Yosuke、Yagi Shintaro、Hirata Masaaki、Iwamura Sena、Yao Siyuan、Shirai Hisaya、Okumura Shinya、Iida Taku、Ito Takashi、Uozumi Ryuji、Kaido Toshimi、Uemoto Shinji
    • Journal Title

      Liver Transplantation

      Volume: 26 Issue: 11 Pages: 1504-1515

    • DOI

      10.1002/lt.25814

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 生体肝移植におけるHLAエピトープ適合度の意義2021

    • Author(s)
      平田真章、進藤岳郎、伊藤孝司、八木真太郎、羽賀博典
    • Organizer
      第29回日本組織適合性学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 生体肝移植におけるHLAエピトープ適合度の意義2021

    • Author(s)
      平田真章、進藤岳郎、伊藤孝司、八木真太郎、羽賀博典
    • Organizer
      第39回日本肝移植学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 肝移植後の抗体関連拒絶の新たな予防戦略「HLAエピトープ適合度によるde novo DSA発現」2021

    • Author(s)
      平田真章、八木真太郎、進藤岳郎、伊藤孝司、川口淳、羽賀博典、波多野悦朗
    • Organizer
      第57回日本移植学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 肝不全における腸内細菌叢と腸内環境: ラット肝移植モデルと肝移植患者を用いた多角的検討2021

    • Author(s)
      姚思遠, 八木真太郎, 平田真章, 岩村宣亜, 宮地洋介, 上本伸二
    • Organizer
      第121回日本外科学会定期学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 肝不全における腸内細菌叢と腸内環境:ラット肝移植モデルと肝移植患者を用いた多角的検討2021

    • Author(s)
      姚思遠、八木 真太郎, 小川 絵里, 平田 真章, 宮地 洋介, 岩村 宣亜, 上本 伸二
    • Organizer
      第121回日本外科学会定期学術集会
    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-09-29   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi