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Bcr-Abl

Bcr-Abl

Most patients with chronic myelogenous leukemia (CML) are treated in the first instance with Bcr-Abl tyrosine-kinase inhibitors (TKI). A chromosomal abnormality that results in the formation of a so-called Philadelphia chromosome is the root cause of more than 90% of CML cases. This abnormality results from the fusion of the break point cluster (Bcr) gene at chromosome 22 with the Abelson (Abl) tyrosine kinase gene at chromosome 9, creating a chimeric oncogene (Bcr-Abl) and a constitutively active Bcr-Abl tyrosine kinase that has been linked to the pathogenesis of CML. The tyrosine kinase has been selectively inhibited by substances.

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