Abstract
We report on the potency of two Tyrphostin tyrosine kinase blockers, AG 1112 and AG 568, to inhibit p210bcr-abl tyrosine kinase activity in K562 cells, concomitant with the induction of erythroid differentiation. AG 568 and especially AG 1112 represent a specific group of nontoxic protein tyrosine kinase blockers among more than 1,400 tested. These compounds possess therapeutic potential for purging Philadelphia chromosome-positive cells in preparation for autologous bone marrow transplantation in chronic myelogenous leukemia.
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