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Molecular mechanism of immune-mediated marrow failure in paroxysmal nocturnal hemoglobinuria

Research Project

Project/Area Number 16590946
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Hematology
Research InstitutionKumamoto University

Principal Investigator

KAWAGUCHI Tatsuya  Kumamoto Univ., School of Medicine, Associate Professor, 医学部附属病院, 助教授 (50244116)

Co-Investigator(Kenkyū-buntansha) HORIKAWA Kentaro  Kumamoto Univ., Graduate School of Medical and Pharmaceutical Sciences, Senior Staff, 大学院・医学薬学研究部, 助手 (40322309)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2005: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2004: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsParoxysmal nocturnal hemoglobinuria / Bone marrow failure / Natural killer cells / stress-inducible protein / GPI anchored proteins / ULBP / MICA / B / ストレス誘導蛋白
Research Abstract

Paroxysmal nocturnal hemoglobinuria (PNH) and idiopathic aplastic anemia (AA) share immune-mediated bone marrow (BM) injury. However, the precise mechanism of the BM injury remains unknown. Recently, we showed that leukemic K562 cells were less sensitive to natural killer (NK) cell-mediated cytotoxicity in vitro when they acquired PIG-A mutations (Nagakura et al., Blood 2002 ; 100 : 1031-37). In the present study, we found that the decreased NK sensitivity of the leukemic cells was conferred by a deficiency of stress-inducible GPI-linked membrane UL16 binding proteins (ULBP) that activate NK and T cells, indicating that ULBP appeared on blood cells can intensify NK cell-mediated cytotoxicity in vitro. Of clinical interest, we found some PNH patients harboring ULBP-expressing (ULBP^+) blood cells. Thus, we expected that ULBP^+ cells could be injured by autologous cytotoxic effector cells (NK and CD8^+ T cells) expressing NKG2D, a receptor for ULBP. Actually, granulocytes of PNH patients carrying ULBP^+ granulocytes were shown to be susceptible to killing by autologous peripheral blood mononuclear cells including the effector cells. In contrast, the ULBP-associated killing was not observed in healthy donors nor PNH patients who had no ULBP^+ granulocytes. These results suggest that PNH patients undergo ULBP-associated marrow injury if they sustain pathogenic pressure to induce the stress proteins. We therefore conclude that the ULBP-NKG2D engagement is implicated in the pathogenesis of BM failure in a proportion of patients with BM failure syndromes and that the membrane expression of ULBP could be a useful clinical marker of immune-mediated marrow injury.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (6 results)

All 2006 Other

All Journal Article (6 results)

  • [Journal Article] Immunoselection by natural killer cells of PIG-A mutant cells missing stress-inducible ULBP2006

    • Author(s)
      Hanaoka N, Kawaguchi T, Horikawa K, Nagakura S, Mitsuya H, Nakakuma H
    • Journal Title

      Blood 107

      Pages: 1184-1191

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 発作性夜間ヘモグロビン尿症(PNH)診断の進歩と検査2006

    • Author(s)
      川口辰哉, 花岡伸佳
    • Journal Title

      日本検査血液学会雑誌 7巻・1号(in press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Immunoselection by natural killer cells of PIG-A mutant cells missing stress-inducible ULBP.2006

    • Author(s)
      Hanaoka N, Kawaguchi T, Horikawa K, Nagakura S, Mitsuya H, Nakakuma H.
    • Journal Title

      Blood 107

      Pages: 1184-1191

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Immunoselection by natural killer cells of PIG-A mutant cells missing stress-inducible ULBPs.2006

    • Author(s)
      Nobuyoshi H, Kawaguchi T, Horikawa K, Nagakura S, Mitsuya H, Nakakuma H
    • Journal Title

      Blood 107

      Pages: 1184-1191

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 発作性夜間ヘモグロビン尿症(PNH)診断の進歩と検査2006

    • Author(s)
      川口辰哉, 花岡伸佳
    • Journal Title

      日本検査血液学会雑誌 7巻・1号

      Pages: 139-149

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Recent advances in diagnosis of paroxysmal nocturnal hemoglobinuria.

    • Author(s)
      Kawaguchi T, Hanaoka N.
    • Journal Title

      Journal of the Japanese Society for Laboratory Hematology (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary

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Published: 2004-04-01   Modified: 2016-04-21  

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