The tumor suppressor gene phosphatase and tensin homolog (PTEN) is inactivated in many human cancers. However, it is unknown whether PTEN functions as a tumor suppressor in human Philadelphia chromosome-positive leukemia that includes chronic myeloid leukemia (CML) and B-cell acute lymphoblastic leukemia (B-ALL) and is induced by the BCR-ABL oncogene. By using our mouse model of BCR-ABL-induced...

introduction: tyrosine kinase inhibitors (tkis) were the first drugs to use an intracellular signaling molecule as a therapeutic target. unresponsiveness to tkis limits therapeutic options, making allogeneic hematopoietic stem cell transplantation (hsct) the only option leading to molecular remission. objectives: to characterize cml patients unresponsive to first- and/or second-generation tki t...

background: imatinib mesylate is the first generation of tyrosine kinase inhibitors (tki) and highly effective in the treatment of chronic myeloid leukemia (cml). we aimed to evaluate thyroid function at baseline and at 1, 3, 6 and 12 months after initiation of imatinib mesylate therapy in 20 newly diagnosed bcr-abl positive cml patients. methods: this study was done during 2013-2014, 20 new ca...

Acute and chronic myeloid leukemia (AML, CML) are hematologic malignancies arising from oncogene-transformed hematopoietic stem/progenitor cells known as leukemia stem cells (LSCs). LSCs are selectively resistant to various forms of therapy including irradiation or cytotoxic drugs. The introduction of tyrosine kinase inhibitors has dramatically improved disease outcome in patients with CML. For...

We report two cases of chronic-phase chronic myeloid leukemia (CML), who presented extramedullary blast crisis; biopsy revealed proliferation of uniform blast cells, and immunophenotype was suggestive of CD34+ primitive hematopoietic cells. The BCR/ABL fusion gene detected in a paraffin-embedded section of the lesion by double-color fluorescence in situ hybridization (FISH), indicating an extra...