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The expression of micro ribonucleic acid (miR)-124 and miR-126 in different stages of breast cancer (BC) and their correlation were investigated to analyze the role of miR-124 and miR-126 in the occurrence and development of BC. BC tissues of 83 BC patients treated in First Teaching Hospital of Tianjin University of Traditional Chinese Medicine from March 2016 to January 2018 were selected as the research group, while the corresponding para-carcinoma normal tissues were selected as the control group. The relative expression levels of miR-124 and miR-126 in both groups were detected via reverse transcription-quantitative polymerase chain reaction (RT-qPCR), and the miR-124 and miR-126 expression asociated with clinicopathological parameters of patients and the correlation between miR-124 and miR-126 was analyzed. The relative expression levels of miR-124 and miR-126 in the research group were significantly lower than those in the control group (P<0.001). miR-124 and miR-126 in the research group were associated with clinicopathological parameters (clinical stage, degree of pathological differentiation and lymph node metastasis) of patients (P<0.001). According to Pearsons correlation analysis, there was a positive correlation between the relative expression levels of miR-124 and miR-126 in cancer tissues (r=0.497, P<0.001). The expression levels of miR-124 and miR-126 were downregulated in BC tissues, which were associated with clinicopathological parameters (clinical stage, degree of pathological differentiation and lymph node metastasis). There was a positive correlation between the expression levels of miR-124 and miR-126 in BC tissues. Thus, miR-124 and miR-126 may be involved in the occurrence, development, invasion and metastasis of BC, and both can be used as targeted biological indexes for treatment of BC.

Expression and correlation of miR‑124 and miR‑126 in breast cancer