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• W2112344459 abstract "Promoter hypermethylation causes gene silencing and is thought to be an early event in carcinogenesis. This study was to detect promoter methylation status and mRNA expression levels of CCCTC-binding factor (CTCF) and sirtuin 6 (SIRT6), and to explore the relationship between methylation and mRNA expression in breast cancer patient samples. Promoter methylation analysis and expression profile analysis of two genes were performed by methylation-specific PCR, bisulfite sequencing PCR, and quantitative real-time PCR in cancer lesions and matched normal tissues. The promoter region of CTCF has not been hypermethylated in all patient samples. In contrast, methylation of SIRT6 gene was present in invasive cancers (93.5%) and matched normal tissues (96.8%) from 62 patients. Promoter hypermethylation of SIRT6 was also observed in ductal carcinoma in situ (three of three) and matched normal tissues (two of three). mRNA expression of CTCF and SIRT6 in invasive tumors showed a lower level than that in paired normal tissues (p=0.008 and p=0.030, respectively). The fold change values of CTCF expression were significantly lower in invasive ductal cancer lesions with Ki-67-positive status (p=0.042). In conclusion, our data showed that the methylation status of CTCF and SIRT6 promoter regions was not statistically different in cancer lesions compared with matched normal tissues. No significant association between promoter methylation status and expression profiles of CTCF and SIRT6 was found in invasive breast cancers." @default.
• W2112344459 created "2016-06-24" @default.
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• W2112344459 date "2014-09-01" @default.
• W2112344459 modified "2023-09-24" @default.
• W2112344459 title "The Promoter Methylation Status and mRNA Expression Levels of<i>CTCF</i>and<i>SIRT6</i>in Sporadic Breast Cancer" @default.
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• W2112344459 doi "https://doi.org/10.1089/dna.2013.2257" @default.
• W2112344459 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4144384" @default.
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• W2112344459 hasPublicationYear "2014" @default.
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