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Genetic alterations in nephroblastomas and anti-proliferating effects induced by silencing of the tumor-related genes.

Research Project

Project/Area Number 18591954
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Pediatric surgery
Research InstitutionNihon University

Principal Investigator

KUSAFUKA Takeshi  Nihon University, School of Medicine, Professor (70263267)

Co-Investigator(Kenkyū-buntansha) 福澤 正洋  大阪大学, 大学院・医学系研究科, 教授 (60165272)
YONEDA Akihiro  Osaka University, Graduate School of Medicine, Assistant Professor (30372618)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,890,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥390,000)
Fiscal Year 2007: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2006: ¥2,200,000 (Direct Cost: ¥2,200,000)
Keywordsgene / nephroblastoma / beta-catenin / neuroblastoma / MYCN
Research Abstract

To investigate how much extent beta-catenin aberration would have positive effect on tumorigenesis of nephroblastomas, normal cDNA of beta-catenin, or various types of mutated sequences were introduced into HEK293 cells derived from the embryonal kidney, and stable clones were established. Three different clones, corresponding to the normal beta-catenin sequence (WT), a point mutation at codon 45 (P45), and an interstitial deletion of the whole exon 3 of the bete-catenin gene (Δ ex3), were selected. Exogenous expressions of the introduced beta-catenins were regulated by administration of doxycycline (DOX) in these cell lines. Subsequent analyses of transcriptional activity using TOPFLASH plasmid system showed that exogenously overexpressed beta-catenins enhanced transcription of the reporter gene regulated through T-cell factor binding site in the WT and P45 cell lines, but not in the Δ ex3. Further investigation, however, failed to show increased cell proliferation in any of these three cell lines, providing no definitive supports to indicate involvement of beta-catenin aberration in the development of nephroblastic tumors.
On the other hand, MYCN gene silencing experiment on a neuroblastoma cell line, NB-1, demonstrated suppressed cell proliferation property accompanied by apoptosis and differentiation of the cells. Because the MYCN gene is amplified and overexpressed in NB-1 similar to many other clinical tumors, strategy to silence this gene may lead to a new hopeful therapy

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (9 results)

All 2007 2006

All Journal Article (7 results) (of which Peer Reviewed: 4 results) Presentation (2 results)

  • [Journal Article] Silencing of MYCN by RNA interference induces growth inhibition,apoptotic activity and cell differentiation in a neuroblastoma cell line with MYCN amplification2007

    • Author(s)
      Nara K, Kusafuka T, Yoneda A, Oue T, Sangkhathat S, Fukuzawa M
    • Journal Title

      Int J Oncol 30

      Pages: 1189-1196

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Silencing of MYCN by RNA interference induces growth inhibition, apoptotic activity and cell differentiation in a neuroblastoma cell line with MYCN amplification2007

    • Author(s)
      Nara, K., Kusafuka, T., Yoneda, A., Oue, T., Sangkhathat, S., Fukuzawa, M
    • Journal Title

      Int J Oncol 30(5)

      Pages: 1189-96

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Silencing of MYCN by RNA interference induces growthinhibition, apoptotic activity and cell differentiation in aneuroblastoma cell line with MYCN amplification.2007

    • Author(s)
      Nara K, Kusafuka T, Yoneda A, Oue T, Sangkhathat S, Fukuzawa M
    • Journal Title

      Int J Oncol. 30

      Pages: 1189-1196

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Artificially accumulated beta-catenin inhibits proliferation and induces neuriteextension of neuroblastoma cell line NB-1 via up-regulation of trkA2006

    • Author(s)
      Sangkhathat S, Nara K, Kusafuka T, Yoneda A, Fukuzawa M
    • Journal Title

      Oncol Rep 16

      Pages: 1197-1203

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Non-random p53 mutations in pediatric undifferentiated(embryonal)sarcoma of the liver2006

    • Author(s)
      Sangkhathat S, Kusafuka T, Nara K, Yoneda A, Fukuzawa M
    • Journal Title

      Hepatol Res 35

      Pages: 229-234

    • NAID

      10018774475

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Artificially accumulated beta-catenin inhibits proliferation and induces neurite extension of neuroblastoma cell line NB-1 via up-regulation of trkA2006

    • Author(s)
      Sangkhathat, S., Nara, K., Kusafuka, T., Yoneda, A., Fukuzawa, M
    • Journal Title

      Oncol Rep 16(6)

      Pages: 1197-203

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Non-random p53 mutations in pediatric undifferentiated (embryonal) sarcoma of the liver2006

    • Author(s)
      Sangkhathat, S., Kusafuka, T., Nara, K., Yoneda, A., Fukuzawa, M
    • Journal Title

      Hepatol Res 35(4)

      Pages: 229-34

    • NAID

      10018774475

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Silencing MYCN by RNA Interference Induces Growth Inhibition,Apoptotic Activity and Cell Differentiation in a Neuroblastoma Cell Line with MYCN Amplification2006

    • Author(s)
      Nara K, Kusafuka T, Yoneda A, Sangkhathat S, Fukuzawa M
    • Organizer
      Advances in Neuroblastoma Research 2006(ANR)
    • Place of Presentation
      Los Angeles
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Silencing MYCN by RNA Interference Induces Growth Inhibition, Apoptotic Activity and Cell Differentiation in a Neuroblastoma Cell Line with MYCN Amplification2006

    • Author(s)
      Nara, K., Kusafuka, T., Yoneda, A., Sangkhathat, S., Fukuzawa, M
    • Organizer
      Advances in Neuroblastoma Research2006(ANR)
    • Place of Presentation
      Los Angeles
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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

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