With the development of imatinib, an Abl tyrosine kinase inhibitor, a targeted therapy of chronic myeloid leukemia (CML) emerged. But further on, allogeneic stem cell transplantation (SCT) is considered the only curative treatment for CML. It is not clear, whether CML patients treated with imatinib will tolerate SCT, because imatinib shows activity against other tyrosine kinases such as c-kit, which plays a crucial role in the regulation of early hematopoiesis. In this study, we examined the effect of imatinib on post transplant stem cell engraftment. For that purpose imatinib treated mice were monitored for hematologic reconstitution after SCT. We found that imatinib (50 mg/kg/d) has no significant influence on hematopoietic recovery in lethally irradiated mice in vivo. Using a murine retroviral infection and transplantation protocol for chronic myeloid leukemia we established a model of imatinib resistance. Different methods including serial transplantations allowed us to elucidate mechanisms of imatinib resistance in this syngeneic CML mouse model.
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With the development of imatinib, an Abl tyrosine kinase inhibitor, a targeted therapy of chronic myeloid leukemia (CML) emerged. But further on, allogeneic stem cell transplantation (SCT) is considered the only curative treatment for CML. It is not clear, whether CML patients treated with imatinib will tolerate SCT, because imatinib shows activity against other tyrosine kinases such as c-kit, which plays a crucial role in the regulation of early hematopoiesis. In this study, we examined the eff...
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