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Oncogenic protein tyrosine kinases

Kit as a human oncogenic tyrosine kinase

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Abstract.

Signals through Kit receptor tyrosine kinase are essential for development of erythrocytes, melanocytes, germ cells, mast cells and interstitial cells of Cajal (ICCs). Mice and rats with a double gene dose of loss-of-function mutations of Kit show depletion of these cells. Although human homozygotes with loss-of-function mutations of Kit have not been reported, gain-of-function mutations of Kit result in development of tumors from mast cells, germ cells and ICCs in humans. The ICC tumors are called gastrointestinal stromal tumors (GISTs), and GISTs are a good target for the Kit inhibitor imatinib mesylate. The interrelationship between the type of Kit gain-of-function mutations and the therapeutic effect of imatinib mesylate has been well characterized in GISTs. Kit is interesting from both a biological and clinical view-point.

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Correspondence to Y. Kitamura.

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Kitamura, Y., Hirotab, S. Oncogenic protein tyrosine kinases. CMLS, Cell. Mol. Life Sci. 61, 2924–2931 (2004). https://doi.org/10.1007/s00018-004-4273-y

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  • DOI: https://doi.org/10.1007/s00018-004-4273-y

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