alexa Dkk-1 secreted by mesenchymal stem cells inhibits growth of breast cancer cells via depression of Wnt signalling.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Qiao L, Xu ZL, Zhao TJ, Ye LH, Zhang XD

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Abstract We determined the molecular mechanism of inhibitory effect of human mesenchymal stem cells (hMSCs) on the growth of human MCF-7 breast cancer cells. Our finding showed that beta-catenin was down-regulated in MCF-7 cells by conditioned media from Z3 hMSCs, and the expression level of dickkopf-1 (Dkk-1) was higher in Z3 cells than that in MCF-7 cells. Neutralization of Dkk-1 and small interference RNA targeting Dkk-1 mRNA in Z3 cells attenuated the inhibitory effect of Z3 cells on MCF-7 cells. Overexpression of Dkk-1 in Z3 cells enhanced the inhibition. Therefore, Dkk-1 secreted by Z3 cells involves the inhibition via the Wnt pathway. This article was published in Cancer Lett and referenced in Journal of Stem Cell Research & Therapy

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