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Immune escape and exhaustion attributing to development of PTLD

Research Project

Project/Area Number 19K17352
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionNational Center for Child Health and Development

Principal Investigator

Masaki Yamada  国立研究開発法人国立成育医療研究センター, 高度感染症診断部, 医長 (30445316)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsEBV / 小児 / 固形臓器移植 / 細胞疲弊 / 臓器移植 / 移植後リンパ増殖性疾患 / シングルセル解析 / リンパ増殖性疾患 / Transcriptome / Epstein-Barr ウイルス / EBウイルス / 小児肝移植 / 免疫チェックポイント / 感染免疫 / 移植免疫 / 腫瘍性増殖
Outline of Research at the Start

臓器や骨髄の移植治療は、多くの小さな子供に命を救っている一方で、免疫抑制剤の内服が必要になります。この免疫抑制剤を使用することで、慢性的にウイルス感染をおこすことがあります。中でもEBウイルスによる持続感染状態が長期間続くと、細胞が「がん」のように増殖してしまう病気(移植後リンパ増殖性疾患:PTLD)があります。本研究ではPTLDの発症機序を解明するために、ヒトの細胞やモデル動物を用いて、慢性ウイルス感染に対する免疫細胞の特徴を探究し、PTLDの早期診断や治療の実現を目指します。

Outline of Final Research Achievements

EBV-associated lymphoproliferative disorders (LPD) are a group of disorders caused by the abnormal proliferation of EBV-infected cells. Among them, post-transplant lymphoproliferative disorder (PTLD) is thought to result from T-cell dysfunction due to the use of immunosuppressive agents. In this study, we attempted to create a PTLD model using humanized mice and elucidate the immune surveillance mechanisms related to T-cell exhaustion. However, in this model, EBV-specific T cells and replicate T-cell exhaustion were not appropriately reproduced, forcing a change in our approach. Consequently, we aimed to establish an experimental system using human peripheral blood mononuclear cells (PBMCs) to conduct single-cell RNA analysis and analyze the properties of EBV-infected cells.

Academic Significance and Societal Importance of the Research Achievements

小児移植患者における移植後リンパ増殖性疾患の病態およびそれと関連した危険因子の解明を目指した研究である。病態の解明やより優れた診断マーカーの発見に寄与しうる実験系の開発を行った。高度先進医療である移植治療を受けたのちに、合併症を制御し患者予後を改善するために重要な研究である。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2024 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (7 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 6 results) Presentation (2 results) (of which Int'l Joint Research: 1 results) Book (3 results)

  • [Int'l Joint Research] University of Pittsburgh/Pittsburgh/PA(米国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] A Focused Review of Epstein-Barr Virus Infections and PTLD in Pediatric Transplant Recipients: Guidance From the IPTA and ECIL Guidelines2024

    • Author(s)
      Yamada Masaki、L'Huillier Arnaud G、Green Michael
    • Journal Title

      Journal of the Pediatric Infectious Diseases Society

      Volume: 13 Issue: Supplement_1 Pages: S31-S38

    • DOI

      10.1093/jpids/piad097

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Chronic Epstein-Barr viral load carriage after pediatric organ transplantation2024

    • Author(s)
      Yamada Masaki、Chen Sharon F.、Green Michael
    • Journal Title

      Frontiers in Pediatrics

      Volume: 12 Pages: 31-38

    • DOI

      10.3389/fped.2024.1335496

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Distinct association between chronic Epstein-Barr virus infection and T cell compartments from pediatric heart, kidney, and liver transplant recipients2023

    • Author(s)
      Yamada Masaki、Macedo Camila、Louis Kevin、Shi Tiange、Landsittel Douglas、Nguyen Christina、Shinjoh Masayoshi、Michaels Marian G.、Feingold Brian、Mazariegos George V.、Green Michael、Metes Diana
    • Journal Title

      American Journal of Transplantation

      Volume: 23 Issue: 8 Pages: 1145-1158

    • DOI

      10.1016/j.ajt.2023.05.007

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Early Detection of Epstein-Barr Virus as a Risk Factor for Chronic High Epstein-Barr Viral Load Carriage at a Living-donor?dominant Pediatric Liver Transplantation Center2023

    • Author(s)
      Yamada Masaki、Fukuda Akinari、Ogura Miyuki、Shimizu Seiichi、Uchida Hajime、Yanagi Yusuke、Ishikawa Yuriko、Sakamoto Seisuke、Kasahara Mureo、Imadome Ken-Ichi
    • Journal Title

      Transplantation

      Volume: 107 Issue: 6 Pages: 1322-1329

    • DOI

      10.1097/tp.0000000000004429

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Pediatric Infectious Diseases Related to Transplantation: Insights From Japan2022

    • Author(s)
      Yamada Masaki、Shoji Kensuke、Miyairi Isao、Kasahara Mureo、Saitoh Akihiko
    • Journal Title

      Pediatric Infectious Disease Journal

      Volume: 42 Issue: 1 Pages: e18-e25

    • DOI

      10.1097/inf.0000000000003731

    • Related Report
      2022 Research-status Report
  • [Journal Article] Fatal Epstein‐Barr virus‐associated hemophagocytic lymphohistiocytosis with virus‐infected T cells after pediatric multivisceral transplantation: A proof‐of‐concept case report2020

    • Author(s)
      Yamada Masaki、Sakamoto Seisuke、Sakamoto Kenichi、Uchida Hajime、Shimizu Seiichi、Osumi Tomoo、Kato Motohiro、Shoji Kensuke、Arai Katsuhiro、Miyazaki Osamu、Nakano Noriyuki、Yoshioka Takako、Fukuda Akinari、Kasahara Mureo、Imadome Ken‐Ichi
    • Journal Title

      Pediatric Transplantation

      Volume: 25 Issue: 3 Pages: 1-6

    • DOI

      10.1111/petr.13961

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Epstein-Barr Virus and Posttransplant Lymphoproliferative Disorders2020

    • Author(s)
      Yamada Masaki、Nowalk Andrew、Green Michael
    • Journal Title

      Emerging Transplant Infections

      Volume: 1 Pages: 1-29

    • DOI

      10.1007/978-3-030-01751-4_27-1

    • ISBN
      9783030017514
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Epidemiology and risk factors of Epstein-Barr virus high load carriage following pediatric liver transplantation2021

    • Author(s)
      山田 全毅
    • Organizer
      19th International Symposium on Epstein-Barr Virus and associated diseases
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 肝・小腸移植後に発症した難治性EBV関連血球貪食リンパ組織球症の一例2019

    • Author(s)
      山田全毅、阪本靖介、今留謙一、笠原群生
    • Organizer
      日本移植学会総会
    • Related Report
      2019 Research-status Report
  • [Book] 慢性活動性EBウイルス病とその類縁疾患の診療ガイドライン20232023

    • Author(s)
      日本小児感染症学会
    • Total Pages
      80
    • Publisher
      診断と治療社
    • ISBN
      9784787825872
    • Related Report
      2022 Research-status Report
  • [Book] 必携 内科医のための 臓器移植診療ハンドブック2023

    • Author(s)
      一般財団法人日本移植学会Transplant Physician委員会
    • Total Pages
      266
    • Publisher
      ぱーそん書房
    • ISBN
      9784907095796
    • Related Report
      2022 Research-status Report
  • [Book] Epstein-Barr Virus and Posttransplant Lymphoproliferative Disorders, Emerging Transplant Infections2020

    • Author(s)
      Masaki Yamada, Andrew Nowalk, Michael Green
    • Total Pages
      16
    • Publisher
      Springer Nature Switzerland
    • ISBN
      9783030017514
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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