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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Differential expression of cytokeratin proteins during tumour progression in oral mucosa.
The expression pattern of cytokeratin filaments in epithelia has been shown to be dependent on their type and grade of differentiation. The type of expression of cytokeratin in a cell may also be altered during carcinogenesis or other pathological conditions. The present study examined the alterations in expression of various cytokeratin types during different stages of tumour progression in the oral mucosa. Six monoclonal anti-cytokeratin antibodies were used for the study. Conspicuous staining differences with these antibodies were evident between normal keratinizing and non-keratinizing mucosa. These differences can be correlated to the differentiation pattern of the normal mucosa types. Antibodies specific to cytokeratin types 10/11, 19 and 14 showed significant correlation with stage of tumour progression. In addition cytokeratin type 18 also showed prominent differences in expression between different stages of tumour progression. These alterations in cytokeratin expression suggest that the terminal differentiation pathway of keratinocytes is disturbed during oral carcinogenesis. The results of the present study also emphasize the potential of using cytokeratin filaments as markers in the biological staging of oral premalignant and malignant lesions.
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