alexa Staining of micronuclei in squamous epithelial cells of human oral mucosa.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Molecular Biomarkers & Diagnosis

Author(s): Casartelli G, Monteghirfo S, De Ferrari M, Bonatti S, Scala M,

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Abstract OBJECTIVE: To evaluate the influence of methodologic variables, staining method and sampling, on the frequency of micronuclei scored in squamous epithelial cells of oral mucosa. Micronuclei were used as biomarkers of structural and numerical chromosome damage. STUDY DESIGN: Feulgen and Giemsa stain and fluorescent dyes Hoechst 33258 and propidium iodide were used for micronucleus staining. Cells were collected by either light or vigorous scraping of oral mucosa. RESULTS: Staining of micronuclei by Hoechst 33258 proved more handly, less time consuming and at least equally reliable to the more widely used Feulgen staining. Results with Giemsa stain and propidium iodide were unsatisfactory. Micronuclei were less frequent in superficial layers of the oral mucosa. CONCLUSION: Hoechst 33258 can be recommended for micronucleus staining in squamous epithelial cells of oral mucosa. Differences in scraping may affect the measurement of micronucleus frequency; scraping should therefore be carefully standardized in each laboratory.
This article was published in Anal Quant Cytol Histol and referenced in Journal of Molecular Biomarkers & Diagnosis

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