Bone morphogenetic protein 7 protects prostate cancer cells from stress-induced apoptosis via both Smad and c-Jun NH2-terminal kinase pathways

Cancer Research
Shangxin YangP Roy-Burman

Abstract

We reported earlier that exposure to exogenous bone morphogenetic protein 7 (BMP7) could strongly inhibit serum starvation-induced apoptosis to C4-2B cell line, a variant of the LNCaP human prostate cancer cell line with propensity for bone metastasis. Whereas serum starvation suppressed the expression of survivin, a member of the inhibitor of apoptosis protein family, its expression was sustained in the presence of BMP7. In this study, we present evidence that BMP7 exposure up-regulated survivin promoter activity, an effect that was associated with activation of Smad, and could be repressed by dominant-negative Smad5. Additionally, serum starvation-induced suppression of c-jun NH2-terminal kinase (JNK) activity in C4-2B cells could be mostly restored by BMP7, and a JNK inhibitor could counteract the antiapoptotic effect of BMP7, without a significant effect on the level of survivin expression. Thus, we identified JNK pathway as another signaling mode for the antiapoptotic function of BMP7. To test the effect of endogenous up-regulation of BMP7, we genetically modulated the C4-2B cell line to overexpress BMP7 protein. Not only was this altered cell line resistant to serum starvation-induced apoptosis but it also exhibited patte...Continue Reading

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Citations

Jul 16, 2011·Hormones & Cancer·Chun-Peng LiaoPradip Roy-Burman
Oct 31, 2006·Oncogene·V VairaD C Altieri
Mar 5, 2009·The Journal of Biological Chemistry·Wensheng Yan, Xinbin Chen
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Nov 5, 2008·Cancer Letters·Emma-Leena AlarmoAnne Kallioniemi
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Jul 15, 2020·Molecular and Cellular Biochemistry·Mathieu BorelLeyre Brizuela

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