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. 1993 Apr;46(4):330–333. doi: 10.1136/jcp.46.4.330

Overexpression of p53 protein in Barrett's syndrome with malignant transformation.

J F Fléjou 1, F Potet 1, F Muzeau 1, F Le Pelletier 1, F Fékété 1, D Hénin 1
PMCID: PMC501213  PMID: 8496390

Abstract

AIMS--To study the overexpression of p53 protein in Barrett's oesophagus with adenocarcinoma, and to correlate this expression with the pathological features of Barrett's syndrome. METHODS--Immunohistochemical staining was performed on frozen sections with a monoclonal antibody directed against wild type and mutated p53 protein (Pab 1801). Eleven cases of Barrett's adenocarcinoma were studied, seven of which had extensive sampling of benign Barrett's mucosa. RESULTS--Eight of 11 adenocarcinomas overexpressed the p53 protein. Both early and advanced tumours were positive. In Barrett's mucosa around the p53 positive tumours, high grade dysplasia was positive; low grade dysplasia and non-dysplastic mucosa were negative. CONCLUSIONS--P53 gene mutation with ensuing p53 protein overexpression is a common feature of Barrett's adenocarcinoma, both at early and advanced stages. This mutation appears as a relatively late event during the neoplastic transformation of Barrett's oesophagus.

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Selected References

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