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1995 Fiscal Year Final Research Report Summary

The genomic difference between the esophageal dysplasia and carcinoma

Research Project

Project/Area Number 06670182
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Human pathology
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

MASUDA Takayuki  Tohoku Univ, Coll Med Sci, Prof, 医療技術短期大学部, 教授 (00113910)

Co-Investigator(Kenkyū-buntansha) SAITO Masahiro  Akita Univ, Res Asso, 医学部, 助手 (70162229)
NISHIHIRA Tetsurou  Tohoku Univ, Asso Prof, 医学部, 助教授 (50101142)
Project Period (FY) 1994 – 1995
KeywordsEsophagus / Dysplasia / Cancer / p53 / Nucleotide sequence
Research Abstract

Esophageal dysplasia has been considered as atypical epithelial lesions. We investigated 12 lesions of the esophageal dysplasia for characterization on immunohitochemisty and mutation analysis of p53 gene. All lesions were picked up by fine needle and deparaffinized for PCR.PCR products were analyzed by direct sequencing method on auto-DNA sequencer. Some samples were analyzed after subcloning and SSCP.Immunohitochemistry showed positive staining of the nuclei in more than half of the dysplastic lesions. All of the severe dysplasia showed marked positive staining. Five of 10 lesions in the moderated and severe dysplasia also had mutations of p53 gene. 1 lesion showed missense mutation at codon 175, and 3 lesions at colon 273. One moderate dysplasia showed nonsense mutation at condon 176. None of the mild dysplasia showed p53 gene mutation. Morphological examination revealed precancereous lesions, but our results of p53 gene analyzes showed that esophageal dysplasia could not be distinguished froma carcinoma of the p53 gene level. Then, the esophageal dysplasia may be very close to intraepithelial carcinoma.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 増田高行: "食道異形成病変におけるp53遺伝子変異" 東北大医短部紀要. 5(1). 1-6 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 増田高行: "食道生検診断におけるp53免疫染色の併用" 東北大医短部紀要. 5(2). 171-178 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masuda T,et al.: "Mutation of p53 gene in esophageal dysplasia." Bull coll Med Sci Tohoku Univ.5. 1-6 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masuda T,et al: "Effective combinations with p53-immunostaining on the histological diagnosis of the esophageal biopsy" Bull coll Med Sci Tohoku Univ. 5. 171-178 (1996)

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

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Published: 1999-03-09  

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