alexa Identification of bone morphogenetic proteins and their receptors in human breast cancer cell lines: importance of BMP2.
Oncology

Oncology

Journal of Carcinogenesis & Mutagenesis

Author(s): Arnold SF, Tims E, Mcgrath BE

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Abstract The most frequent site of breast cancer metastasis is bone suggesting that some breast cancers express proteins that facilitate this process. We evaluated whether a highly metastatic breast cancer cell line, MDA-MB-231, and a less metastatic breast cancer cell line, MCF-7, contain bone morphogenetic proteins (BMP). Semiquantitative reverse transcriptase-polymerase chain reaction (RT-PCR) demonstrated that MDA and MCF-7 cells contain mRNAs for BMP receptors IA, IB and II. RT-PCR indicated the presence of mRNAs for BMPs 2 and 3 but not 4 and 7 in breast cells. Using a RT-PCR strategy with molecular beacons, we found that the mRNA for BMP2 in MDA cells was decreased by 75\% after a sublethal dose of radiation. An ELISA using an antibody specific for BMP2 demonstrated that BMP2 protein was reduced after radiation of MDA cells. The mRNA for BMP2 was expressed to a lesser extent in MCF-7 cells than MDA cells and was not altered after radiation treatment of MCF-7 cells as demonstrated by molecular beacon RT-PCR. Recombinant human BMP2 decreased the proliferation of MDA cells to a greater extent than MCF-7 cells. These results expand the number of tissues that contain BMPs and demonstrate the effect of this signalling pathway of the growth state of these tissues. Copyright 1999 Academic Press. This article was published in Cytokine and referenced in Journal of Carcinogenesis & Mutagenesis

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