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MiR-1285-5p/TMEM194A axis affects cell proliferation in breast cancer.

Cancer Sci. 2020 Feb;111(2):395-405. doi:10.1111/cas.14287. Epub 2020 Jan 23
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摘要


The onset of breast cancer among young patients is a major issue in cancer etiology. Our previous study has shown that poor prognosis in young women with breast cancer is associated with lower expression of the microRNA miR-1285-5p. In this study, we showed that the expression of miR-1285-5p is lower in tumor tissues than in normal tissues. Accumulating evidence suggests that miR-1285-5p plays critical roles in various types of cancers. However, the functional role of miR-1285-5p in breast cancer remains to be elucidated. Here, we showed the tumor-suppressive role of miR-1285-5p and detailed its mechanism of action in breast cancer. Overexpression of miR-1285-5p significantly inhibited cell proliferation in breast cancer cells regardless of the tumor subtype. Among the target genes of miR-1285-5p, we found that transmembrane protein 194A (TMEM194A) was directly regulated by miR-1285-5p. Notably, separation of centrosomes from the nuclear envelope was observed upon knockdown of TMEM194A or overexpression of miR-1285-5p. In conclusion, our findings show that miR-1285-5p is a tumor suppressor via TMEM194A inhibition in breast cancer.

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