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Immunohistochemical examination of tumor-suppressor gene p53 product and pyrimidine dimer in solar keratosis

, : Immunohistochemical examination of tumor-suppressor gene p53 product and pyrimidine dimer in solar keratosis. Journal Of Cancer Research & Clinical Oncology. 119(5): 260-262

In order to find biomarkers to measure the effects of UV irradiation, we examined the accumulation of p53 protein and pyrimidine dimers in 18 solar keratosis specimens. Frozen or AMeX-fixed solar keratosis specimens were immunohistochemically stained by anti-p53 mouse monoclonal antibody, pAb1801 and polyclonal anti-(pyrimidine dimer) antibody. Nuclear accumulation of p53 protein was found in 5/18 (28%) solar keratosis lesions. The percentage of cases showing nuclear p53 protein varied according to the histological type; in the bowenoid type it was 4/7 (57%); in the atrophic type it was 1/7 (14%). Nuclear pyrimidine dimers were not stained in solar keratosis, although the skin of UV-irradiated nude mice was positive. Accumulation of p53 protein is a good marker for early precancerous change caused by UV exposure.


PMID: 7680043

DOI: 10.1007/bf01212722

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