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1997 Fiscal Year Final Research Report Summary

The development of rapid diagnostic system for detecting a predisposition to cancer in early childhood

Research Project

Project/Area Number 07557232
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Pediatrics
Research InstitutionUniversity of Tokyo

Principal Investigator

HAYASHI Yasuhide  Univ.of Tokyo, Faculty of Medicine, Associate Professor, 医学部・附属病院, 講師 (30238133)

Co-Investigator(Kenkyū-buntansha) YAMAMORI Shunji  Mitsubishi Biochemical Cooperation, Molecular Department, Director, 遺伝子解析部, 部長
KOBAYASHI Miyuki  Univ.of Tokyo, Faculty of Medicine, Assistant Professor, 医学部・附属病院, 助手 (60205391)
YANAGISAWA Masayoshi  Univ.of Tokyo, Faculty of Medicine, Professor, 医学部・附属病院, 助手 (90049031)
Project Period (FY) 1995 – 1997
Keywordsacute lymphoblastic leukemia / neuroblastoma / tumor suppressor gene / p53 gene / RAS gene / p16 gene / p73 gene / p19 gene
Research Abstract

Homozygous deletions (HD) of p16 and p15 genes and mutations of pl6, RAS and p53 genes were examined in acute lymphoblastic leukemia (ALL) and childhood solid tumors. Rearrangements of p16 were higher in cell lines and fresh leukemia without t(1 ; 19) than those with t(l ; 19). Remarkably, mutations were found in 3 of the primary cases (5%). As for leukemia with MLL rearrangement (MLL+), HD of the p16 and p15 genes was found in 5 (11%) of 19 acute myeloid leukemias (AMLs). PCR-single strand conformation polymorphism (SSCP) showed no mutation in the 32 patients tested. Our results suggest that alterations of 16 and p15 genes are involved in a subset of acute leukemias with MLL.Mutations of the p53 gene were found in 3 of 57 (5%) T-ALL patients at diagnosis, 1 of 14 (7%) patients at relapse and in 12 of 18 (67%) cell lines, All patients with p53 mutations in the course of disease died. Mutations of the p21 gene were not identified in 71 fresh samples and in 18 cell lines. N-RAS mutations … More were found in 2 of 57 (4%) fresh T-ALL patients only at diagnosis, and 4 of 118 cell lines (22%). Alterations of the p16 gene were found in 18 of 47(38%) patients at diagnosis and in 7 of 14(50%) at relapse (not significant). There were no differences in the frequency of alteration of the p16 and p15 genes between event-free patients and the remaining patients. Furthermore, we found the methylation of p16 gene in 3 of 7 patients lacking homozygous deletions, suggesting higher frequency of p16 inactivation than previous reports in T-ALL.
N-myc, p16, DCC, DPC4, MADR2 and p73 genes were analyzed in neuroblastoma (NB). HD of p16 genre was not found in 81 samples. PCR-SSCP analysis identified only missense mutation, suggesting polymorphism. Absence or decreased expression of pl6 gene was found in 6 of 10 cell lines. Hypermethylation of the p16 gene was found in 12 of 19 cell lines, suggesting that hypermethylation plays an important role for the development or progression of neuroblastoma. Absence or reduced expression of DCC gene was found in half of the samples. PCR-SSCP analysis of DCC gene showed only missense mutation, suggesting polymorphism. Alterations of DPC4 and MDRR2 genes were relatively rare. These results suggest that DCC gene plays an important role in the dissemination of NB, and that DPC4 and MAD2 gene are not involved in the development of NB.This study may counribute to the development of rapid diagnostic system for detecting a predisposition to cancer in early childhood. Less

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Ohnishi H.et al.: "Homozygous deletions of p16/MTS1 gene are frequent but mutations are infrequent in childhood T-cell acute lymphoblastic leukemia." Blood. 86. 1269-1275 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kawamura M.et al.: "Mutations of the p53 and ras genes in childhood t(1;19)-acute lymphoblastic leukemia." Blood. 85. 2546-2552 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ohnishi H.et al.: "Homozygous deletions of p16/MTS1 and p15/MTS2 in t)1;19)-negative but not in t(1;19)-positive B precursor acute lymphoblastic leukemia in childhood." Leukemia. 10. 1104-1110 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ohnishi H.et al: "Alteration of p16 and p15 genes in acute leukemia with MLL gene rearrangements and thier corelation with clinical features." Leukemia. 11. 2120-2124 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takita J.et al.: "Deletion map of Chromosome 9 and p16(CDKN2A) gene alterations in neuroblastoma." Cancer Res.57. 907-912 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kong X-T.et al.: "Expression and mutational analysis of the DCC,DPC4,and MADR2/JV18-1 genes in neuroblastoma." Cancer Res.57. 3772-3778 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ohnishi H,Kawamura M.Ida K,Sheng X.M,Hanada R,Nobori T,Yamamori S,Hayashi Y: "Homozygous deletions of pl6/MTS1 gene are frequent but mutations are infrequent in childhood T-cell acute lymphoblastic leukemia" Blood. 86. 1269-1275 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kawamura M,Kikuchi A,Kobayashi S,Hanada R,Yamamoto K,Horibe H,Shikano T,Ueda K,Hayashi K,Sekiya T,Hayashi Y: "Mutations of the p53 and ras genes in childhood t (1 ; 19) -acute lymphoblastic leukemia" Blood. 85. 2546-2552 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ohnishi H,Kawamura M,Hanada R,Bessho F,Hayashi Y,et al.: "Homozygous deletions of p16/MTS1 and pl5/MTS2 in t) 1 ; 19) -negative but not in t (1 ; 19) -positive B precursor acute lymphoblastic leukemia in childhood" Leukemia. 10. 1104-1110 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ohnishi H,Guo SX,Ida K,Taki T,Naritaka S,Bessho F,Yanagisawa M,Hanada R,Eguchi M,Kamada N,Kita K,Yamamori S,Hayashi Y.: "Alteration of pl6 and pl5 genes in acute leukemia with MLL gene rearrangements and thier corelation with clinical features." Leukemia. 11. 2120-2124 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takita J,Hayashi Y,Kohno T,Yamaguchi N,Hanada R,Yamamoto K,Yokota J.: "Deletion map of Chromosome 9 and p16 (CDKN2A) gene alterations in neuroblastoma." Cancer Res. 57. 907-912 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kong X-T,Choi Sh, Xu Feng, Chen T,Hayashi Y: "Expression and mutational analysis of the DCC,DPC4, and MADR2/JV18-1 genes in neuroblastoma" Cancer Res. 57. 3772-3778 (1997)

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

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Published: 1999-12-08  

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