Epigenetic regulation of retinoic acid receptor β2 gene in the initiation of breast cancer
2011
In order to investigate the methylation status of the retinoic acid receptor beta 2 gene (RAR-β2) in breast carcinoma in relation to gene expression and clinicopathological parameters of patients with breast cancer, expression of RAR-β2 gene and methylation status were analyzed in invasive carcinoma, atypical ductal hyperplasia, fibroadenoma specimens, and normal tissues. Our findings showed that RAR-β2 expression was lower in the breast cancer compared to normal tissue and fibroadenoma. The methylation rate of RAR-β2 in breast cancer and precancerous lesions of breast cancer were higher than that of normal tissues. Hypermethylation may be an initial step in breast carcinogenesis.
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