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  • Title: CEP-751 inhibits TRK receptor tyrosine kinase activity in vitro exhibits anti-tumor activity.
    Author: Camoratto AM, Jani JP, Angeles TS, Maroney AC, Sanders CY, Murakata C, Neff NT, Vaught JL, Isaacs JT, Dionne CA.
    Journal: Int J Cancer; 1997 Aug 07; 72(4):673-9. PubMed ID: 9259409.
    Abstract:
    The present report describes the in vitro and in vivo profile of CEP-751, a novel receptor tyrosine kinase inhibitor. CEP-751 at 100 nM inhibits the receptor tyrosine kinase activity of the neurotrophin receptors trkA, trkB and trkC. CEP-751 has no effect on activity of receptors for EGF, IGF-I, insulin or on erbB2; inhibition of receptors for PDGF and bFGF was observed but occurred with lesser potency than inhibition of trk. CEP-751 exhibited anti-tumor efficacy against tumors derived from NIH3T3 cells transfected with trkA. Inhibition of trk phosphorylation could also be measured in these tumors, suggesting that anti-tumor efficacy of CEP-751 is related to inhibition of trk receptor tyrosine kinase activity. CEP-751 was found to be without effect when administered to nude mice bearing SK-OV-3 tumors, which overexpress erbB2 receptors, providing further evidence that inhibition of tumor growth may be related to inhibition of trk receptor tyrosine kinase activity. Our data indicate that CEP-751 is a potent trk inhibitor which possesses anti-tumor activity.
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