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Aberrant methylation of tumor suppressor genes and allelic imbalance in cervical intraepithelial neoplasia

  • Genomics. Transcriptomics. Proteomics
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Abstract

The methylation status of genes p16, MLH1, HIC1, MGMT, N33, and RB1 was determined in cervical smears of women without gynecological pathology, in biopsies from patients with high-grade cervical intraepithelial neoplasia (CIN3), and in samples of nondysplastic cervical tissue adjacent to CIn3. The level of methylation of these genes in normal smears was insignificant. In CIN3, methylation frequencies were as follows: 58% for p16, 51% for MLH1, 84% for HIC1, and 27% for N33. However, dysplastic tissues did not differ significantly from the control with respect to the methylation frequencies of the MGMT and RB1 genes (8 and 15%, respectively). The methylation frequency of the suppressor genes in nondysplastic, morphologically normal adjacent tissues was also high. We found that 21% of samples (9/42) had microsatellite instability at chromosomes 5q11.2–q14.3 (3/42) and 13q14–q14.3 (6/42). Loss of heterozygosity (LOH) at region 13q14 was detected in 7% of samples (3/42).

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Original Russian Text © T.V. Kekeeva, A.I. Zhevlova, Yu.I. Podistov, Yu.V. Solov’eva, D.V. Zaletaev, M.V. Nemtsova, 2006, published in Molekulyarnaya Biologiya, 2006, Vol. 40, No. 2, pp. 224–230.

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Kekeeva, T.V., Zhevlova, A.I., Podistov, Y.I. et al. Aberrant methylation of tumor suppressor genes and allelic imbalance in cervical intraepithelial neoplasia. Mol Biol 40, 194–199 (2006). https://doi.org/10.1134/S0026893306020038

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