Tyrosine kinases are major targets of contemporary chemotherapy,and tyrosine kinase inhibitors such as imatinib mesylate(Gleevec, Novartis; formerly known as STI571) are approvedfor the treatment of some forms of chronic myelogenous leukemiaand a rare form of stomach cancer called gastrointestinal stromaltumor. Surprisingly, some types of gastrointestinal stromaltumors refractory to the antiproliferative effects of imatinibmesylate in vitro were shown recently to respond to the drugin vivo, with the response dependent on immune-cell function.1One group of investigators following up on this finding in greaterdepth2 and another independently assessing innate immune cells3. . . [Full Text of this Article]
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From the Cancer Immunology Program, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia.
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