title: [Aberrant methylation of tumor suppressor genes and allelic imbalance in cervical intraepitelial neoplasia].
abstract: We analysed 42 high-grade CIN or CIN3 samples, 42 nondysplasia tissues adjacent to CIN3. 35 smears from women without gynecological pathology were also evaluated. Methylation status of six genes (p16, MLH1, HIC1, MGMT, N33 and RB1) was determined using methylation-sensitive PCR. There is some insignificant level of methylation determined in normal smears. Methylation percentages of the genes in CIN3 were: p16, 58%; MLH1, 51%; HIC1, 84%; N33, 27%. Methylation percentages of the genes in nondysplasia adjacent tissues were also high. There is no significant difference in methylation frequencies of MGMT and RB1 determined between dysplasia and control. We identified allelic imbalance at chromosomes 5q11-q14 and 13q14 in 21% cases (9/42). The incidence of LOH was investigated in 7% (3/42) cases at region 13q14.
authors.forename: T V
authors.initials: TV
authors.lastname: Kekeeva
authors.forename: A I
authors.initials: AI
authors.lastname: Zhevlova
authors.forename: Iu I
authors.initials: IuI
authors.lastname: Podisov
authors.forename: Iu V
authors.initials: IuV
authors.lastname: Solov'eva
authors.forename: D V
authors.initials: DV
authors.lastname: Zaletataev
authors.forename: M V
authors.initials: MV
authors.lastname: Nemtsova
mesh_terms: D000293:Adolescent; D000328:Adult; D002877:Chromosomes, Human / Q000235:genetics*; D019175:DNA Methylation; D005260:Female; D016147:Genes, Tumor Suppressor; D006801:Humans; D019656:Loss of Heterozygosity / Q000235:genetics*; D018895:Microsatellite Repeats / Q000235:genetics; D008875:Middle Aged; D040641:Quantitative Trait Loci / Q000235:genetics; D002583:Uterine Cervical Neoplasms / Q000235:genetics* / Q000473:pathology; D002578:Uterine Cervical Dysplasia / Q000235:genetics* / Q000473:pathology