title: [Methylation of promoter region of RAR-beta2 gene in renal cell, breast, and ovarian carcinomas].
abstract: The protein encoded by RAR-beta (retinoic acid receptor) gene is a member of the superfamily, of nuclear receptors of retinoids which are involved in regulation of cell differentiation and proliferation. The level of RAR-beta2 mRNA is downregulated in a number of cell lines derived from human epithelial tumors. Inactivation of the RAR-beta2 gene is associated with methylation of its promoter region, which is observed in various carcinomas at a frequency of 30-70%. In renal and ovarian tumors, methylation at this region is poorly studied, the data being contradictory. We report a high methylation frequency in the gene promoter region in RCC (59%, 36/61) and a somewhat lower frequency in EOC (30%, 15/50). Methylation frequency in BC (46%, 26/56) is consistent with the published data. Significant correlation of methylation frequency in promoter region of RAR-beta2 gene with RCC progression (P < or = 0.005 by Fisher's exact test) was established.
authors.forename: D S
authors.initials: DS
authors.lastname: Khodyrev
authors.forename: V I
authors.initials: VI
authors.lastname: Loginov
authors.forename: I V
authors.initials: IV
authors.lastname: Pronina
authors.forename: T P
authors.initials: TP
authors.lastname: Kazubskaia
authors.forename: R F
authors.initials: RF
authors.lastname: Gar'kavtseva
authors.forename: E A
authors.initials: EA
authors.lastname: Braga
mesh_terms: D001943:Breast Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D002292:Carcinoma, Renal Cell / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D019175:DNA Methylation; D015536:Down-Regulation; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D009363:Neoplasm Proteins / Q000096:biosynthesis* / Q000235:genetics; D010051:Ovarian Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D011401:Promoter Regions, Genetic; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D012334:RNA, Neoplasm / Q000096:biosynthesis / Q000235:genetics; D018168:Receptors, Retinoic Acid / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D009363:Neoplasm Proteins; D012333:RNA, Messenger; D012334:RNA, Neoplasm; D018168:Receptors, Retinoic Acid; C082925:retinoic acid receptor beta