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Article

Expression of LPA2 is associated with poor prognosis in human breast cancer and regulates HIF-1α expression and breast cancer cell growth

  • Authors:
    • Min Li
    • Dong Xiao
    • Jia Zhang
    • Hangying Qu
    • Ya Yang
    • Yan Yan
    • Xu Liu
    • Jizhao Wang
    • Lin Liu
    • Jiansheng Wang
    • Xiaoyi Duan
  • View Affiliations / Copyright

    Affiliations: The Second Department of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China, Department of Surgical Oncology, The 3201 Hospital of Shaanxi Province, Hanzhong, Shaanxi 723000, P.R. China, The Second Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712000, P.R. China, Department III of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450000, P.R. China, Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
  • Pages: 3479-3487
    |
    Published online on: October 26, 2016
       https://doi.org/10.3892/or.2016.5206
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Abstract

Breast cancer (BC) generally exhibits poor prognosis owing to its invasive and metastatic characteristics and is the leading cause of cancer-related deaths in women worldwide. Lysophosphatidic acid receptor 2 (LPA2) and hypoxia inducible factor-1α (HIF-1α) were found to be correlated with BC invasion and metastasis, respectively. However, the effect of LPA2 on BC in Chinese women has not yet been reported, nor have the overall survival and prognostic significance of LPA2 or its association with HIF-1α in BC. In the present study, we assessed the effect of LPA2 on HIF-1α expression, on overall survival and prognostic significance in BC in Chinese women, and on cell proliferation, migration and invasion in MCF-7 BC cells in vitro. The data showed that LPA2 and HIF-1α protein expression levels were higher in the BC tissue specimens and that LPA2 expression was significantly associated with menopausal status (postmenopausal), nodal metastasis and tumor-node-metastasis (TNM) stage, whereas HIF-1α expression was significantly associated with estrogen receptor status, nodal metastasis and TNM stage. Furthermore, LPA2 and HIF-1α expression were positively correlated (r=0.562; P<0.001). LPA2 and HIF-1α protein levels were associated with shorter overall patient survival according to univariate analysis (log-rank test; P<0.001), and nodal metastasis, TNM stage, LPA2 and HIF-1α expression were independent prognostic predictors in patients as determined by multivariate analysis (P<0.05). In vitro, the data suggested that LPA2 affected HIF-1α expression and LPA2 overexpression or knockdown resulted in increased or inhibited tumor cell proliferation, migration and invasion, respectively. In conclusion, our data demonstrated that LPA2 expression was associated with HIF-1α expression and that a high level of LPA2 was associated with shorter overall survival and was an independent prognostic predictor for BC in Chinese women. Furthermore, LPA2 showed the ability to regulate the cell proliferation, migration and invasion of BC cells.
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Copy and paste a formatted citation
Spandidos Publications style
Li M, Xiao D, Zhang J, Qu H, Yang Y, Yan Y, Liu X, Wang J, Liu L, Wang J, Wang J, et al: Expression of LPA2 is associated with poor prognosis in human breast cancer and regulates HIF-1α expression and breast cancer cell growth. Oncol Rep 36: 3479-3487, 2016.
APA
Li, M., Xiao, D., Zhang, J., Qu, H., Yang, Y., Yan, Y. ... Duan, X. (2016). Expression of LPA2 is associated with poor prognosis in human breast cancer and regulates HIF-1α expression and breast cancer cell growth. Oncology Reports, 36, 3479-3487. https://doi.org/10.3892/or.2016.5206
MLA
Li, M., Xiao, D., Zhang, J., Qu, H., Yang, Y., Yan, Y., Liu, X., Wang, J., Liu, L., Wang, J., Duan, X."Expression of LPA2 is associated with poor prognosis in human breast cancer and regulates HIF-1α expression and breast cancer cell growth". Oncology Reports 36.6 (2016): 3479-3487.
Chicago
Li, M., Xiao, D., Zhang, J., Qu, H., Yang, Y., Yan, Y., Liu, X., Wang, J., Liu, L., Wang, J., Duan, X."Expression of LPA2 is associated with poor prognosis in human breast cancer and regulates HIF-1α expression and breast cancer cell growth". Oncology Reports 36, no. 6 (2016): 3479-3487. https://doi.org/10.3892/or.2016.5206
Copy and paste a formatted citation
x
Spandidos Publications style
Li M, Xiao D, Zhang J, Qu H, Yang Y, Yan Y, Liu X, Wang J, Liu L, Wang J, Wang J, et al: Expression of LPA2 is associated with poor prognosis in human breast cancer and regulates HIF-1α expression and breast cancer cell growth. Oncol Rep 36: 3479-3487, 2016.
APA
Li, M., Xiao, D., Zhang, J., Qu, H., Yang, Y., Yan, Y. ... Duan, X. (2016). Expression of LPA2 is associated with poor prognosis in human breast cancer and regulates HIF-1α expression and breast cancer cell growth. Oncology Reports, 36, 3479-3487. https://doi.org/10.3892/or.2016.5206
MLA
Li, M., Xiao, D., Zhang, J., Qu, H., Yang, Y., Yan, Y., Liu, X., Wang, J., Liu, L., Wang, J., Duan, X."Expression of LPA2 is associated with poor prognosis in human breast cancer and regulates HIF-1α expression and breast cancer cell growth". Oncology Reports 36.6 (2016): 3479-3487.
Chicago
Li, M., Xiao, D., Zhang, J., Qu, H., Yang, Y., Yan, Y., Liu, X., Wang, J., Liu, L., Wang, J., Duan, X."Expression of LPA2 is associated with poor prognosis in human breast cancer and regulates HIF-1α expression and breast cancer cell growth". Oncology Reports 36, no. 6 (2016): 3479-3487. https://doi.org/10.3892/or.2016.5206
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