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      1. Author :
        Holland, Sacha J; Pan, Alison; Franci, Christian; Hu, Yuanming; Chang, Betty; Li, Weiqun; Duan, Matt; Torneros, Allan; Yu, Jiaxin; Heckrodt, Thilo J; Zhang, Jing; Ding, Pingyu; Apatira, Ayodele; Chua, Joanne; Brandt, Ralf; Pine, Polly; Goff, Dane; Singh, Rajinder; Payan, Donald G; Hitoshi, Yasumichi
      2. Title :
      3. Type :
        Journal Article
      4. Year :
        2010
      5. Publication :
        Cancer research
      6. Products :
      7. Volume :
        70
      8. Issue :
        4
      9. Page Numbers :
        N/A
      10. Research Area :
        N/A
      11. Keywords :
        Animals; Antineoplastic Agents; Benzocycloheptenes; Bioware; Breast Neoplasms; Carcinoma; Female; Hela Cells; Humans; K562 Cells; MDA-MB-231-D3H2LN cells; Mice; Mice, Inbred BALB C; Mice, Nude; Neoplasm Invasiveness; Neoplasm Metastasis; Oncogene Proteins; Protein kinase inhibitors; Proto-Oncogene Proteins; Receptor Protein-Tyrosine Kinases; Survival Analysis; Triazoles; Tumor Cells, Cultured; Xenograft Model Antitumor Assays
      12. Abstract :
        Accumulating evidence suggests important roles for the receptor tyrosine kinase Axl in cancer progression, invasion, metastasis, drug resistance, and patient mortality, highlighting Axl as an attractive target for therapeutic development. We have generated and characterized a potent and selective small-molecule inhibitor, R428, that blocks the catalytic and procancerous activities of Axl. R428 inhibits Axl with low nanomolar activity and blocked Axl-dependent events, including Akt phosphorylation, breast cancer cell invasion, and proinflammatory cytokine production. Pharmacologic investigations revealed favorable exposure after oral administration such that R428-treated tumors displayed a dose-dependent reduction in expression of the cytokine granulocyte macrophage colony-stimulating factor and the epithelial-mesenchymal transition transcriptional regulator Snail. In support of an earlier study, R428 inhibited angiogenesis in corneal micropocket and tumor models. R428 administration reduced metastatic burden and extended survival in MDA-MB-231 intracardiac and 4T1 orthotopic (median survival, >80 days compared with 52 days; P < 0.05) mouse models of breast cancer metastasis. Additionally, R428 synergized with cisplatin to enhance suppression of liver micrometastasis. Our results show that Axl signaling regulates breast cancer metastasis at multiple levels in tumor cells and tumor stromal cells and that selective Axl blockade confers therapeutic value in prolonging survival of animals bearing metastatic tumors.
      13. URL :
        http://www.ncbi.nlm.nih.gov/pubmed/20145120
      14. Call Number :
        PKI @ catherine.lautenschlager @
      15. Serial :
        8949
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