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The Role of ΔFosB on the Pro-survival Effect of PTHrP in Goat Mammary Epithelial Cells

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Abstract

The mechanism of regulation mammary epithelial cell number in ruminant is not fully understood, but is thought to be dependent on the balance of cell proliferation and cell apoptosis. Parathyroid hormone-related protein (PTHrP) could express in mammary epithelial cells and breast cancer cells, and has been reported to regulate cell survival. Here, we showed that PTHrP induced cell proliferation and increased the expression of CyclinD1 and proliferating cell nuclear antigen (PCNA) in goat mammary epithelial cells (GMEC). PTHrP increased the mRNA levels of anti-apoptosis genes Bcl-2 and Bcl-xl, and protected GMEC from apoptosis. We also found ΔFosB, an alternative splicing of finkel-biskis-jinkins murine osteosarcoma B (fosB), inhibited GMEC apoptosis, and induced cell proliferation with increased Bcl-2/Bax and Bcl-xl/Bax ratios. Interestingly, ΔFosB could further promote the pro-survival effect of PTHrP, and the Bcl-2/Bax and Bcl-xl/Bax ratios showed higher levels. We conclude that the pro-survival role of PTHrP in GMEC may be regulated by ΔFosB.

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Acknowledgments

This study was supported by the National Natural Science Foundation of China (no. 31572368).

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Authors and Affiliations

  1. Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China

    Hui Li & Huiling Zheng

  2. College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China

    Xiaotong Yao & Lihui Li

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  1. Hui Li
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Correspondence to Huiling Zheng.

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Li, H., Yao, X., Li, L. et al. The Role of ΔFosB on the Pro-survival Effect of PTHrP in Goat Mammary Epithelial Cells. Appl Biochem Biotechnol 180, 707–716 (2016). https://doi.org/10.1007/s12010-016-2126-4

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  • DOI: https://doi.org/10.1007/s12010-016-2126-4

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