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The expression and significance of five types of miRNAs in breast cancer. | LitMetric

AI Article Synopsis

Article Abstract

Background: This study aimed to investigate the expression and significance of 5 types of miRNAs in breast cancer to provide a theoretical and practical foundation for using these miRNAs in the diagnosis and treatment of breast cancer, thereby improving medical services.

Material/methods: Stem-loop real-time RT-PCR was used to detect the expression levels of miR-145, miR-21, miR-10b, miR-125a, and miR-206 in 35 cases of breast cancer and adjacent normal breast tissues, and to analyze the relationship of miRNAs expression with clinicopathological features of breast cancer. The expression levels of estrogen receptor (ER) and progesterone receptor (PR) were examined by immunohistochemistry. Fluorescence in situ hybridization was used for the detection of HER-2 and TOP 2A.

Results: The expression levels of miR-145, miR-125a, and miR-206 in breast cancer were lower than those in adjacent normal tissues. MiR-145 was negatively correlated with tumor size, lymph node metastasis, ER, HER-2, and TOP 2A (P<0.05), regardless of age, menstruation, and PR. MiR-125a was correlated with negative node status, negative HER-2 status (P<0.05), whereas tumor size, age, menstruation, ER, and PR were independent factors. MiR-206 expression was correlated with negative ER status, negative PR status, and negative HER-2 status (P<0.05), regardless of age, menstruation, lymph node metastasis, and TOP 2A. MiR-21 and miR-10b expression in breast cancer tissues was significantly higher than that in adjacent tissues (P<0.05). MiR-21 in post-menstrual patients with lymph node metastasis was highly expressed (P<0.05), and had no correlations with tumor size, ER, PR, and TOP 2A expression. MiR-10b expression was positively correlated with breast cancer tumor size, lymph node metastasis, and TOP 2A status (P<0.05), but had no correlations with age, menstruation, ER, PR, and HER-2.

Conclusions: MiR-145, miR-21, miR-10b, miR-125a, and miR-206 may play important roles in breast cancer development and invasion.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4117676PMC
http://dx.doi.org/10.12659/MSMBR.891246DOI Listing

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