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DNA二重鎖切断の修復酵素の発現解析による癌罹患リスクの推定法の開発

Research Project

Project/Area Number 18710048
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Risk sciences of radiation/Chemicals
Research InstitutionSapporo Medical University

Principal Investigator

染谷 正則  Sapporo Medical University, 医学部, 助教 (60404711)

Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2007: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2006: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywords放射線疫学 / 癌罹患リスク
Research Abstract

1.乳癌とDNA修復酵素発現の関係を検討
申請者は,乳癌で乳房温存手術および腋窩リンパ節郭清を行った患者から血液を採取し,末梢リンパ球のDNA-PK(活性およびNBS1フォーカスを測定した所,非浸潤癌に比べて浸潤癌で,またリンパ節転移が陰性例よりも陽性例でDNA-PK活性が低く,フォーカス数が多いことが示された。この事より乳癌罹患リスクの推定だけでなく,発生した癌の臨床的悪性度の予測が可能であり特に腋窩リンパ節郭清を省略できる症例の選別が可能である事を示した。
(Oncology Reports 2007)
2.発生する癌の悪性度の推定
切除された乳癌組織を免疫染色法によってKu70/86タンパクの発現を計測した所,Ku70/86タンパク発現が低いほど組織学的悪性度が高く,腋窩リンパ節転移の要請率が高い傾向にある事が示された。これらの事より,Ku70/86などのDNA修復酵素の発現低下が癌罹患リスクの上昇,発生する癌の組織学的悪性度の上昇に関与している事が示された。
(Oncology Reports 2007)

Report

(2 results)
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (6 results)

All 2007 2006

All Journal Article (5 results) (of which Peer Reviewed: 3 results) Presentation (1 results)

  • [Journal Article] Association of DNA-PK activity and radiation-induced NVSI foci formati on in lymphocytes with clinical malignancy in breast cancer patients2007

    • Author(s)
      Masanori Someya
    • Journal Title

      Oncology reports 18

      Pages: 873-878

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Immunohistochemical analysis of Ku70/86 expression of breast cancer tissues2007

    • Author(s)
      Masanori Someya
    • Journal Title

      Oncology reports 18

      Pages: 1483-1487

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ability to repair DNA double-strand breaks related to cancer susceptibility and radiosensitivity2007

    • Author(s)
      Koh-ichi Sakata
    • Journal Title

      Radiation Medicine 25

      Pages: 433-438

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The association of DNA-dependent protein kinase activity with chromosomal instability and risk of cancer2006

    • Author(s)
      Masanori Someya
    • Journal Title

      Carcinogenesis 27

      Pages: 117-122

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Association of ionizing radiation-induced foci of NBS1 with chromosomal instability and breast cancer susceptibility2006

    • Author(s)
      Masanori Someya
    • Journal Title

      Radiation Research 166

      Pages: 575-582

    • Related Report
      2006 Annual Research Report
  • [Presentation] 乳癌患者におけるリンパ球DNA-PK活性、放射線誘発NBSIフオーカスと臨床的悪性度の関係2007

    • Author(s)
      染谷 正則
    • Organizer
      第46回日本医学放射線学会生物部会
    • Place of Presentation
      茨城県つ<ば市
    • Related Report
      2007 Annual Research Report

URL: 

Published: 2006-04-01   Modified: 2016-04-21  

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