Abstract
The expression of p53 was studied immunohistochemically in combination with the DNA ploidy pattern by gland isolation in 97 alcohol-fixed gastric lesions. A polyclonal antibody, CM-1, was applied to the paraffin-embedded sections in this study. Overexpression of the p53 protein was found in 73.2% of 41 well or moderately differentiated gastric carcinomas and 52.2% of 23 cases with poor differentiation (P<0.05). Immunoreactivity of p53 was also detected in isolated cancerous glands. No p53 immunoreactivity was detected in benign gastric lesions including adenomas, hyperplastic polyps and regions of intestinal metaplasia. In addition, flow cytometric DNA analysis was performed on isolated glandular epithelium adjacent to the portions used for immunostaining. DNA aneuploidy (DA) was detected in 85.7% of the well or moderately differentiated carcinomas and 42.9% of those with poor differentiation (P<0.05). There was a positive correlation between DA, p53 positivity and the presence of regional lymph node metastasis, but not with other clinicopathological variables. In spite of the limited applicability of this method to poorly differentiated gastric cancer, we found that immunostaining and flow cytometry in combination with the gland isolation method facilitates analysis of gastric carcinogenesis.
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Kitayama, Y., Sugimura, H., Tanaka, M. et al. Expression of p53 and flow cytometric DNA analysis of isolated neoplastic glands of the stomach: an application of the gland isolation method. Vichows Archiv A Pathol Anat 426, 557–562 (1995). https://doi.org/10.1007/BF00192109
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DOI: https://doi.org/10.1007/BF00192109