1. The low expression of miR-1976 in plasma samples indicating its biological functions in the progression of breast cancer
- Author
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Xinyang Wang, Mengdi Liang, Ge Ma, Jingshen Wang, Shukui Wang, Tiansong Xia, and Xu Han
- Subjects
0301 basic medicine ,Cancer Research ,Cell ,Breast Neoplasms ,Exosomes ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,In vivo ,Cell Line, Tumor ,microRNA ,medicine ,Animals ,Humans ,Cell Proliferation ,Mice, Inbred BALB C ,Gene knockdown ,business.industry ,General Medicine ,medicine.disease ,In vitro ,MicroRNAs ,030104 developmental biology ,medicine.anatomical_structure ,Oncology ,Cell culture ,030220 oncology & carcinogenesis ,Disease Progression ,Cancer research ,Biomarker (medicine) ,Female ,business - Abstract
The incidence of breast cancer (BC) is the highest among women. Identification of miRNAs as biomarkers may help to improve the diagnosis of BC. The purpose of this study was to assess the expression levels of miR-1976 in plasma samples and the biological functions in the progression of BC. The expression levels of miR-1976 in plasma samples and tissues were measured by quantitative real-time polymerase chain reaction (qRT-PCR). The associations between the expression levels and clinicopathological features were studied. Cell supernatants were used to simulate circulation. The biological functions of miR-1976 were assessed in vitro and in vivo. The expression levels of miR-1976 in plasma samples were found significantly lower in patients with BC than those in healthy controls, and were associated with Ki-67. The expression levels in BC tissues were lower than those in adjacent normal tissues, and were correlated with the number of lymph nodes and Ki-67. The expression levels in BC cell supernatants and cell lines were lower than that in normal human breast epithelial cell line HBL-100. miR-1976 knockdown promoted proliferation in vitro and in vivo. miR-1976 may serve as a promising non-invasive biomarker for the diagnosis of BC in the future.
- Published
- 2020