Document Detail

p53 Protein expression in squamous cell carcinomas from sun-exposed and non-sun-exposed sites.
MedLine Citation:
PMID:  8077465     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: In sun-exposed nonmelanoma skin cancers, observation of specific p53 gene mutations implicate the role of UV radiation-induced mutations in the pathogenesis of these tumors. Immunohistochemical p53 protein overexpression and p53 gene mutation have been frequently considered related events. OBJECTIVE: We investigated the differences in p53 immunostaining in squamous cell carcinomas (SCCs) with varying degrees of differentiation, from both chronically sun-exposed and sun-protected sites of the skin. METHODS: Twenty-six SCCs (15 UV-related and 11 UV-unrelated) and five specimens of Bowen's disease (in situ SCC) from sun-exposed skin were examined by means of BP53-12-1 monoclonal antibody immunohistochemistry. RESULTS: p53 Immunoreactivity was observed in 66.7% of sun-exposed, 54.5% of non-sun-exposed invasive SCCs (Fisher's exact test, p = 0.689), and 80% of Bowen's disease specimens. In 50% of all samples, p53 positivity was more prominent in the proliferating periphery of the tumor with gradual loss of positivity as the cells differentiated. CONCLUSION: The reliability of p53 immunohistochemistry needs further molecular genetic studies.
Y Oram; I Orengo; S C Baer; T Ocal
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Academy of Dermatology     Volume:  31     ISSN:  0190-9622     ISO Abbreviation:  J. Am. Acad. Dermatol.     Publication Date:  1994 Sep 
Date Detail:
Created Date:  1994-09-30     Completed Date:  1994-09-30     Revised Date:  2005-11-17    
Medline Journal Info:
Nlm Unique ID:  7907132     Medline TA:  J Am Acad Dermatol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  417-22     Citation Subset:  IM    
Department of Dermatology, Baylor College of Medicine, Houston, TX.
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MeSH Terms
Bowen's Disease / metabolism
Carcinoma, Squamous Cell / metabolism*
Middle Aged
Skin Neoplasms / metabolism*
Tumor Suppressor Protein p53 / analysis*
Reg. No./Substance:
0/Tumor Suppressor Protein p53

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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