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MiR-200a is involved in proliferation and apoptosis in the human endometrial adenocarcinoma cell line HEC-1B by targeting the tumor suppressor PTEN

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Abstract

Abnormal cell proliferation is a main driver of tumor formation and development, which involves the deletion, mutation, and downregulation of tumor suppressor genes. One study recently demonstrated that miR-200a plays an oncogenic role by inhibiting phosphatase and tensin homolog deleted on chromosome ten (PTEN) expression. In the human endometrial adenocarcinoma cell line HEC-1B, suppression of miR-200a expression inhibited cell proliferation and promoted apoptosis, whereas its over-expression had no effect on proliferation and apoptosis. Furthermore, inhibition or over-expression of miR-200a increased or reduced the expression of PTEN, respectively, with no change in PTEN mRNA levels. These effects were achieved by directly targeting miR-200a to the 3′ untranslated region of the PTEN mRNA to inhibit its translation. Taken together, we propose that in HEC-1B cells, miR-200a functions as an oncogene, affecting proliferation and apoptosis by regulating the expression of the tumor suppressor PTEN at the translational level.

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Acknowledgments

We thank Prof. Yingxiong Wang for helpful suggestions, and Prof. Junlin He for assistance with the statistical analysis. This study was supported by the National Natural Science Foundation of China (Grant number 31271545). The National Key Clinical Department Funding (201101CKZD). The foundation played no role in the study’s design, the collection or analysis of data, the decision to publish, or the preparation of the manuscript.

Conflict interests

The authors declare no competing interests.

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Authors and Affiliations

  1. Laboratory of Reproductive Biology, Chongqing Medical University, No. 1 Yixueyuan Rd, Box 197, Chongqing, 400016, People’s Republic of China

    Rong Li, Jun-lin He, Xue-mei Chen, De-Hui Yang, Yu-Bin Ding & Xue-Qing Liu

  2. Department of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People’s Republic of China

    Rong Li, Yu-Bin Ding & Hong-Bo Qi

  3. Pediatric Research Institute of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China

    Chun-Lan Long

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  1. Rong Li
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Correspondence to Rong Li.

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Li, R., He, Jl., Chen, Xm. et al. MiR-200a is involved in proliferation and apoptosis in the human endometrial adenocarcinoma cell line HEC-1B by targeting the tumor suppressor PTEN. Mol Biol Rep 41, 1977–1984 (2014). https://doi.org/10.1007/s11033-014-3045-5

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