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c-kitレセプターチロシンキナーゼの恒常的活性化と腫瘍原性に関する研究

Research Project

Project/Area Number 10152229
Research Category

Grant-in-Aid for Scientific Research on Priority Areas (A)

Allocation TypeSingle-year Grants
Research InstitutionOsaka University

Principal Investigator

金倉 譲  大阪大学, 医学部, 教授 (20177489)

Project Period (FY) 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1998: ¥2,600,000 (Direct Cost: ¥2,600,000)
Keywordsc-kit / チロシンキナーゼ / 受容体 / シグナル伝達 / 腫瘍 / 突然変異
Research Abstract

c-kitレセプターチロシンキナーゼ(KIT)は、kinase領域とjuXtamembrane領域の変異により、恒常的に活性化される。特に、kinase領域のAsp814コドン(ヒトではAsp816)は恒常的活性化変異のhot spotであり、マスト細胞増多を伴う骨髄異形成症候群や骨髄線維症、aggressive mastocytosis、急性骨髄性白血病患者から検出される。juxtamembrane領域のc-kit活性化変異は、血液系では2種のマスト細胞株のみに変異が認められる。しかし、ヒトの消化管ストローマ腫瘍からは、高率にjuxtamembrane領域のc-kit活性化変異が検出されるが、hot spotは認められない。また、kinase領域のAsp814コドン変異は、juxtamembrane領域の変異に比べ腫瘍原性が高い。Asp814→Val(V814)変異に伴う変異KITの恒常的活性化と腫瘍化シグナル伝達機構について解析すると、KITV814のkinaseinsert部に存在するTyr719残基が恒常的活性化に重要であり、下流への腫瘍化シグナルにも重要な役割を担っていることが明らかとなった。

Report

(1 results)
  • 1998 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Hirota,S., et al.: "Gain-of-function mutations of c-kit in human gastrointestinal stromal tumors." Science. 279. 577-580 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yokota,T., et al.: "Growth-supporting activities of fibronectin on hematopoietic stem/progenitor cells in vitro and in vivo : structural requirement for fibronectin activities of CS1 and cell-binding domains." Blood. 18. 3263-3272 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Matsumura,I., et al.: "Involvement of prolonged ras activation in thrombopoietin-induced megakaryocytic differentiation of a human factor-dependent hematopoietic cell line." Mol.Cell.Biol.18. 4282-4290 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Nishida,T., et al.: "Familial gastrointestinal stromal tumors with germ line mutation of the KIT gene." Nature Genet.19. 323-324 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tsujimura,T., et al.: "Constitutively activating mutation in the catalytic domain of c-kit elicits hematopoietic transformation by receptor self-asociation not at the ligand-dependent dimerization site." Blood. 93. 1319-1329 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Matsumura,I., et al.: "Transcriptional regulation of cyclin D1 promoter by STATS : its involvement in cytokine-dependent growth of hematopoietic cells." EMBOJ.18. 1367-1377 (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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