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The low expression of miR-1976 in plasma samples indicating its biological functions in the progression of breast cancer

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Abstract

Background

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.

Methods

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.

Results

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.

Conclusion

miR-1976 may serve as a promising non-invasive biomarker for the diagnosis of BC in the future.

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Acknowledgements

All authors wish to thank all the patients and family members for participating in this study.

Funding

This study was funded by the Natural Science Foundation of China (81572607) and Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX19_1158).

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Authors and Affiliations

Authors

Contributions

SW and TX contributed to the design of the study, the interpretation of data, the revision of the article as well as final approval of the version to be submitted. JW, GM and XH performed the statistical analysis, and drafted and revised the article. JW, GM, XH, ML, and XW performed the experimental study. All authors read and approved the final version of the manuscript.

Corresponding authors

Correspondence to T. Xia or S. Wang.

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Conflict of interest

The authors declared that they have no competing interests.

Ethical approval

All patients involved consented to participate under the Clinical Patient ethical statement. The study was approved by the Institutional Ethical Board of the First Affiliated Hospital of Nanjing Medical University (Number 2017-SR-171).

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Informed consent was obtained before surgery.

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Wang, J., Ma, G., Han, X. et al. The low expression of miR-1976 in plasma samples indicating its biological functions in the progression of breast cancer. Clin Transl Oncol 22, 2111–2120 (2020). https://doi.org/10.1007/s12094-020-02361-3

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  • DOI: https://doi.org/10.1007/s12094-020-02361-3

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