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発がん過程における遺伝子変異

Research Project

Project/Area Number 06280250
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Research InstitutionNational Cancer Center Research Institute and Research Center for Innovative Oncology, National Cancer Center Hospital East

Principal Investigator

長尾 美奈子  国立がんセンター研究所, 発がん研究部, 部長 (40100151)

Co-Investigator(Kenkyū-buntansha) 豊田 実  国立がんセンター研究所, 発がん研究部, 研究員 (70270676)
牛島 俊和  国立がんセンター研究所, 発がん研究部, 室長 (90232818)
中釜 斉  国立がんセンター研究所, 発がん研究部, 室長 (30198030)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥14,400,000 (Direct Cost: ¥14,400,000)
Fiscal Year 1996: ¥4,400,000 (Direct Cost: ¥4,400,000)
Fiscal Year 1995: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1994: ¥5,000,000 (Direct Cost: ¥5,000,000)
KeywordsBrca-1 / Brca-2 / PP2AB / 染色体マッピング / LOH / PhIP / 乳がん / microsatellite / aberrant crypt focus / 発がん感受性
Research Abstract

(1)Brcalの染色体マッピングおよびPhIP誘発乳がんにおける役割
報告されているマウスBrcalの配列にもとづいてprimerを設定し、ラット精巣cDNAライブラリーよりクローンを複数個得、PCR-SSCPによりSD,F344,ACI,BUF,DON,WKY,WF,LEW,SHR,WTCおよびZIの多型を検討した。BNとWTC間で多型が検出されたのでLinkage解析した。染色体10番Gh locusより4.6cMの部位、Aep,Ppyから0.4cM Ghよりに相当する部位にマップされた。PhIP誘発乳がん4/15例およびDMBA誘発乳がん4/15例でGhまたはPpyにLOHが誘発された。
(2)Brca2の染色体マッピングとPhIP誘発乳がんにおける役割
ヒトBRCA2cDNAをプローブとしてラット精巣からcDNAクローンを得た。それをプローブとしてラットゲノムクローンを得、ACI,BN,BUF,COP,F344,SD,WKYおよびWTC系統間の多型を検討した。ACI-BUF間で多型が検出されたので連鎖解析し、染色体12番にマップした。ヒトBRCA2は13q12-13でRB1は13q13にマップされているがラットではRb1遺伝子は染色体15番で、Rbとは分離された。
(3)PP2A B制御サブユニットαの乳発がんにおける役割
PP2A B制御サブユニットαのラットcDNAクローンを用いて3'の非翻訳領域のPCR-SSCP解析を行いACI-BUF間に多型を見い出し、染色体12番Rb1から1cMはなれた部位にマップした。SD-F344間で多型を検出し、16例のPhIP誘発SD x F344 F1乳がんおよび5例のDMBA誘発乳がんのLOH解析を行ったが、検出されなかった。
(4)結論
ラット乳発がんにおけるBrcalの関与が示唆されたが、Brcalの両アレルに変異があるかは、今後解決すべき問題である。Brca2に関してはエキソン11のコードされるアミノ酸の系統間における多型は、系統間の乳発がん感受性の差を説明できるものではない。今後SD-F344間の多型を検出し、Brca2遺伝子の関与を解明する。セリン/スレオニンホスファターゼの発がんにおける役割解明を目的とし、種々の分子種について今後検討する。

Report

(3 results)
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] Toyota,M.,Ushijima,T.,Nagao,M.,et al.: "Mlcrosatellite instability and loss or neterozygosity on chromosome 10 in rat mammary tumors induced by 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine" Mol.Carcinogenesis. 15. 176-182 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Toyota,M.,Ushijima,T.,Nagao,M.,et al.: "Genetic alterations in rat colon tumors induced by heterocyclic amines" Cancer. 77. 1593-1597 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Nagao,M.,Wakabayashi,K.,et al.: "Human exposure to carcinogenic heterocyclic amines,and their mutational fingerprints in experimental animals" Environ.Health Perspect.104. 497-501 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Suzuki,T.,Hayashi,M.,Nagao,M.et al.: "Organ variation in the mutagenicity of MeIQ in Big Blue【encircledR】 lacI transgenic mice" Mutat.Res.369. 45-49 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yamada,S.,Nakagama,H.,Nagao,M.et al.: "Linkage mapping of rat Rb1 gene on chromosome 15" Mamm.Genome. in press. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Nagao,M.,Ushijima,T.,et al.: "Genetic changes induced by heterocyclic amines" Mutat.Res.in press. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Nagao,M.,Sugimura,T.: "Carcinogenicity : Testing,predicting and interpreting chemical effect" Marcel Dekker,Inc. (in press), (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Ushijima, T., Hosoya, Y., Nagao, M., et al.: "A rapid mcthod for detection of mutations in the lacI gene using PCR-single strand conformation polymorphism analysis : Demonstration of its high sensitivity" Mutation Res.334. 283-292 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Kakiuchi, H., Watanabe, M., Nagao, M., et al.: "Specific 5′-GGGA-3′→5′-GGA-3′ mutation of the Apc gene in rat colon tumors induced by 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine" Proc. Natl. Acad. Sci. USA. 92. 910-914 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Ushijima, T., Makino K., Nagao, M., et al.: "Mutation, loss of heterozygosity, and recombination of the p53 gene in mouse forestomach tumors induced by 2-amino-3,4-dimethylimidazo[4,5-f]quinoline" Mol. Carcinogenesis. 12. 23-30 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Canzian, F., Ushijima, T., Nagao, M., et al.: "Construction of a phylogenetic tree for inbred strains of rat by arbitrarily primed polymerase chain reaction (AP-PCR)" Mammalian Genome. 6. 231-235 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Suzui, M., Nagao, M., et al.: "No involvement of Ki-ras or p53 gene mutations in colitis-associated rat colon tumors induced by 1-hydroxyanthraquinone and methylazoxymethanol acetate" Molecular Carcinogenesis. 12. 193-197 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Canzian, F., Ushijima, T., Nagao, M., et al.: "Genetic mapping of the RET protooncogene on rat Chromosome 4" Mammalian Genome. 6. 433-435 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Toyota, M., Ushijima, T., Nagao, M., et al.: "cDNA cloning of the rat APC gene and assigrment to chromosome 18" Mammalian Genome. 6. 746-748 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Ochiai, M., Watanabe, M., Nagao, M., et al.: "DNA adduct tormation, cell proliteration and aberrant crypt tocus tormation induced by phIP in male and female rat colon with relevance to carcinogenesis" Carcinogenesis. 17. 95-98 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Sone, H., Wakabayashi, K., Nagao, M., et al.: "Hepatocellular carcinoma induction in LEC rats by a low dose of 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline" Jpn. J. Cancer Res.87. 25-29 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Toyota, M., Canzian, F., Nagao, M., et al.: "A rat genetic map constructed by representational difference analysis markers with suitability for large-scale typing" Proc. Natl. Acad. Sci. USA. 93(in press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Toyota, M., Ushijima, T., Nagao, M., et al.: "Microsatellite instability and loss of heterozygosity on chromosome 10 in rat mammary tumors induced by 2-amino-1-methyl-5-phenylimidazo[4,5-b]pyridine" Molecular Carcinogenesis. 15(in press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Ushijima, T., Makino, K., Nagao, M., et al.: "Princeton Sci. Publ." Genetic alterations in HCA-induced tumors, 281-291 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Ushijima,T.,Makino,H.,Nagao,M.,et al.: "Presence of p53 mutations in 3Y1-B clone 1-6:A rat cell line widely used as a normal immortalized fibroblast." Jpn.J.Cancer Res.85. 455-458 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Ushijima,T.,Nagao,M.,et al.: "Infrequent mutation of Ha-ras and p53 in rat mammary carcinomas induced by 2-amino-1-methy1-6-phenylimidazo〔4,5-b〕pyridine" Mol.Carcinog.10. 38-44 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Nagao,M.,Ushijima,T.,et al.: "Dietary carcinogens and mammary carcinogenesis:Induction of rat mammary carcinomas by administration of heterocyclic amines in cooked foods" Cancer(Supplement). 74. 1063-1069 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Canzian,F.,Nagao,M.,et al.: "Instability of microsatellites in rat colon tumors induced by heterocyclic amines" Cancer Res.54. 6315-6317 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Ushijima,T.,Nagao,M.,et al.: "Tissue-specific mutational spectra of 2-amino-3,4-dimethy1imidazo〔4,5-f〕quinoline in the liver and bone marrow of lacI transgenic mice" Carcinogenesis. 15. 2805-2809 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kakiuchi,H.,Nagao,M.,et al.: "Specific 5′-GGGA-3′to 5′-GGA-3′ mutation of the APC gene in rat colon tumors induced by 2-amino-1-methy1-6-phenylimidazo〔4,5-b〕pyridine" Proc.Natl.Acadi.Sci.USA. 92. 910-914 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Ushijima,T.,Nagao,M.,et al: Princeton Science Publication(in press), (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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