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2002 Fiscal Year Final Research Report Summary

Establishment of radiotherapy combined with antisense bcl-2 oligodeoxynucleotide in prostate cancer

Research Project

Project/Area Number 13671674
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Urology
Research InstitutionKeio University

Principal Investigator

MARUMO Ken  Keio University School of Medicine, Associate Professor, 医学部, 助教授 (80138130)

Co-Investigator(Kenkyū-buntansha) MURAI Masaru  Keio University School of Medicine, professor, 医学部, 教授 (90101956)
NAKASHIMA Jun  Keio University School of Medicine, assistant professor, 医学部, 講師 (10167546)
NAKAGAWA Ken  Keio University School of Medicine, assistant professor, 医学部, 講師 (50227740)
Project Period (FY) 2001 – 2002
Keywordsprostate cancer / bcl-2 / apoptosis / radiation / diethylstilbestrol
Research Abstract

Bc1-2 has been shown to prolong cancer cell survival by blocking apoptosis and to have the function of scavenging reactive oxygen species. Antisense bc1-2 oligodeoxynucleotides (bc1-2 AS ODN) produced dose-dependent increases in cytotoxicity and apoptosis and a dose-dependent decrease in Bc1-2 protein expression in PC-3 cells and JCA-1 cells. Bc1-2 AS ODN significantly augmented the cytotoxicity induced by radiation on JCA-1 cells, which was assessed by the colony forming assay, when compared with controls (bcl-2 sense ODN or cationic lipid)
Diethylstilbestrol (DES) significantly inhibited cell growth in PC-3 cells in a dose dependent fashion and significantly induced reactive oxygen species (ROS) generation. Antisense bc1-2 oligodeoxynucleotides significantly enhanced DES-induced cytotoxicity. A significant increase in apoptotic cells was induced by the combination of bc1-2 AS ODN and DES when compared with bc1-2 AS ODN alone and DES alone. Buthionine sulphoximine (BSO), which is a glutathione depletor, significantly decreased the intracellular concentration of glutathione and augmented the DES-induced cytotoxicity and ROS in PC-3 cells. Neither the generation of ROS nor the intracellular concentration of glutathione was influenced by bc1-2 AS ODN treatment. In conclusion, bc1-2 AS ODN significantly enhanced DES-induced cytotoxicity on hormone-independent prostate cancer cells through the apoptotic pathway, independently of an augmentation of reactive oxygen species generation, whereas the glutathione depletor augments its cytotoxicity and reactive oxygen species generation

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Eiji Kikuchi et al.: "Enhancement of diethystilbestrol induced cytotoxicity by bcl-2antisense oligodeoxynucleotides and a glutathione depletor for prostate cancer"Journal of Urology. 169. 730-734 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Eiji Kikuchi et al.: "Suppression of hormone-refractory prostate cancer by a novel nuclear factor kappaB inhibitor in nude mice"Cancer Research. 63. 107-110 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kikuchi,E, Horiguchi,Y, Nakashima,J, Kuroda,K, Oya,M, Ohigashi,T, Takahashi,N, Shima,Y, Umezawa,K, Murai,M: "Suppression of hormone-refractory prostate cancer by a novel nuclear factor kappaB inhibitor in nude mice"Cancer Res,. 63(1). 107-110 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kikuchi,Eiji, Nakashima,Jun, Horiguchi,Yutaka, Oya,Mototsugu, Ohigashi,Takashi, Murai,Masaru: "Enhancement of diethylstilbestrol induced cytotoxicity by bcl-2 antisense oligodeoxynucleotides and a glutathione depletor for prostate cancer"J Urol. 169. 730-734 (2003)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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