Recepteur d'Origine Nantais Tyrosine Kinase Is a Direct Target of Hypoxia-inducible Factor-1α-mediated Invasion of Breast Carcinoma Cells
Hypoxia-inducible factor-1α (HIF-1α) overexpression was shown to be associated with invasion and metastasis of tumors and tumor cell lines. The identification of molecular targets that contribute to HIF-1α-mediated invasion is under intensive investigation. We have analyzed the role of recepteur...
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Published in | The Journal of biological chemistry Vol. 284; no. 21; p. 14001 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
American Society for Biochemistry and Molecular Biology
22.05.2009
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Abstract | Hypoxia-inducible factor-1α (HIF-1α) overexpression was shown to be associated with invasion and metastasis of tumors and
tumor cell lines. The identification of molecular targets that contribute to HIF-1α-mediated invasion is under intensive investigation.
We have analyzed the role of recepteur d'origine nantais (RON), a tyrosine kinase receptor for macrophage-stimulating protein
(MSP) that plays a role in breast cancer cell invasion as one of the molecular targets of HIF-1α. Analysis of a panel of breast
cancer cell lines indicated a correlation between HIF-1α and RON expression. Treatment of HIF-1α- and RON-positive breast
cancer cells with HIF-1α inhibitor, echinomycin, led to the inhibition of HIF-1α activity and RON expression. We have identified
HIF-1α binding site on the RON promoter. Chromatin immunoprecipitation analysis and site-directed mutagenesis of the RON promoter
confirmed the binding of HIF-1α to RON promoter. HIF-1α inhibitor-, echinomycin-, or short hairpin RNA-mediated selective
knockdown of HIF-1α or HIF-1α target RON tyrosine kinase abrogated RON gene expression, and the RON ligand macrophage-stimulating
protein mediated invasion of breast cancer cells. Consequently, the data presented herein demonstrated RON as a novel molecular
target of HIF-1α and suggest a potential therapeutic role for HIF-1α or RON tyrosine kinase inhibitors in the blockade of
RON tyrosine kinase-mediated invasion of carcinoma cells. |
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AbstractList | Hypoxia-inducible factor-1α (HIF-1α) overexpression was shown to be associated with invasion and metastasis of tumors and
tumor cell lines. The identification of molecular targets that contribute to HIF-1α-mediated invasion is under intensive investigation.
We have analyzed the role of recepteur d'origine nantais (RON), a tyrosine kinase receptor for macrophage-stimulating protein
(MSP) that plays a role in breast cancer cell invasion as one of the molecular targets of HIF-1α. Analysis of a panel of breast
cancer cell lines indicated a correlation between HIF-1α and RON expression. Treatment of HIF-1α- and RON-positive breast
cancer cells with HIF-1α inhibitor, echinomycin, led to the inhibition of HIF-1α activity and RON expression. We have identified
HIF-1α binding site on the RON promoter. Chromatin immunoprecipitation analysis and site-directed mutagenesis of the RON promoter
confirmed the binding of HIF-1α to RON promoter. HIF-1α inhibitor-, echinomycin-, or short hairpin RNA-mediated selective
knockdown of HIF-1α or HIF-1α target RON tyrosine kinase abrogated RON gene expression, and the RON ligand macrophage-stimulating
protein mediated invasion of breast cancer cells. Consequently, the data presented herein demonstrated RON as a novel molecular
target of HIF-1α and suggest a potential therapeutic role for HIF-1α or RON tyrosine kinase inhibitors in the blockade of
RON tyrosine kinase-mediated invasion of carcinoma cells. |
Author | Jessica Rogge Amalraj Thangasamy Sudhakar Ammanamanchi |
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DOI | 10.1074/jbc.M809320200 |
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Snippet | Hypoxia-inducible factor-1α (HIF-1α) overexpression was shown to be associated with invasion and metastasis of tumors and
tumor cell lines. The... |
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Title | Recepteur d'Origine Nantais Tyrosine Kinase Is a Direct Target of Hypoxia-inducible Factor-1α-mediated Invasion of Breast Carcinoma Cells |
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