title: Higher expression of circulating miR-182 as a novel biomarker for breast cancer.
abstract: MicroRNAs (miRNAs), present in the serum in a stable and reproducible manner, may be used as biomarkers for various diseases. Few studies have previously investigated circulating miRNAs in the peripheral blood of breast cancer (BC) patients. To identify the role of serum miR-182 levels in BC, the present study detected miR-182 levels in the serum of 46 BC patients and 58 controls, by quantitative PCR. The results showed that the serum miR-182 levels in BC patients were significantly higher compared with the serum of healthy controls (P<0.01). The miR-182 was also overexpressed in the BC tissues compared with the para-carcinoma tissues. Furthermore, the serum levels of miR-182 in the estrogen receptor (ER)-positive patients were considerably lower compared with those in the ER-negative patients. The serum levels of miR-182 in the progesterone receptor (PR)-positive patients were also found to be lower compared with those in the PR-negative patients. The current study highlights results consistent with miR-182 as a novel and valuable biomarker for the diagnosis of BC.
authors.affiliation: School of Public Health, Shandong University, Jinan, Shandong 250012, P.R. China ; Key Laboratory of Tumour Molecular Biology in Binzhou Medical University, Department of Biochemistry and Molecular Biology, Binzhou Medical University, Yantai, Shandong 264003, P.R. China.
authors.forename: Ping-Yu
authors.initials: PY
authors.lastname: Wang
authors.forename: Hai-Tao
authors.initials: HT
authors.lastname: Gong
authors.forename: Bao-Feng
authors.initials: BF
authors.lastname: Li
authors.forename: Chun-Lei
authors.initials: CL
authors.lastname: Lv
authors.forename: Huan-Tai
authors.initials: HT
authors.lastname: Wang
authors.forename: Hui-Hui
authors.initials: HH
authors.lastname: Zhou
authors.forename: Xin-Xin
authors.initials: XX
authors.lastname: Li
authors.forename: Shu-Yang
authors.initials: SY
authors.lastname: Xie
authors.forename: Bao-Fa
authors.initials: BF
authors.lastname: Jiang
keywords: breast cancer; circulating miRNAs; diagnosis; gene expression; miR-182