Promoter methylation and expression changes of BRCA1 in cancerous tissues of patients with sporadic breast cancer

Oncology Letters
Qiuyun LiJianlun Liu

Abstract

BRCA1 is a susceptibility gene that has a genetic predisposition for breast cancer. BRCA1 gene mutation is closely associated with familial hereditary breast cancer, but the BRCA1 gene mutation is rarely found in sporadic breast cancer. According to previous studies, decreased expression of BRCA1 was detected in certain types of sporadic breast cancer. Aberrant methylation of DNA promoter CpG islands is one of the mechanisms by which tumor suppressor gene expression and function is lost. The aim of the present study was to investigate BRCA1 gene expression, methylation status and clinical significance in sporadic types of breast cancer. Quantitative polymerase chain reaction (PCR) and bisulfite sequencing PCR were respectively used to detect expression differences of BRCA1 mRNA and BRCA1 methylation in the 49 cancerous and paired non-cancerous samples from patients with breast cancer. The associations of BRCA1 expression and methylation status with the clinicopathologic characteristics were analysed. BRCA1 mRNA expression levels in the 49 breast cancer tissues were lower than those in the paired non-cancerous tissues. There was a significant statistical difference (P=0.001). BRCA1 mRNA expression was not associated with the mai...Continue Reading

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Citations

Jun 2, 2016·Epigenetics : Official Journal of the DNA Methylation Society·Catherine L CallahanJo L Freudenheim
Apr 3, 2019·Journal of Cellular Biochemistry·Parisa PaydarHossein Fallah
Aug 18, 2020·Cancer Management and Research·Xin YangAlimu Reheman
Dec 23, 2015·Drug Resistance Updates : Reviews and Commentaries in Antimicrobial and Anticancer Chemotherapy·Jianfei Qi, Ze'ev A Ronai

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Methods Mentioned

BETA
PCR

Software Mentioned

ABI Prism 7900 SDS
SPSS

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