Resistance to Imatinib in Chronic Myeloid Leukemia and Therapeutic Approaches to Circumvent the Problem
Abstract:The majority of patients with chronic phase chronic myeloid leukaemia (CP-CML) treated with imatinib achieves cytogenetic disease remission. Molecular monitoring for residual disease has prognostic significance: rising BCR-ABL levels may provide earliest indication that a patient has become resistant to treatment. The emergence of resistance to imatinib has dampened the enthusiasm for this drug. The most common cause of resistance is the selection of leukemic clones mutated in ABL kinase domain due to amino acid substitutions with prevention of appropriate binding of the drug. Amplification and over-expression of BCR-ABL, acquired cytogenetic aberrations and modulation of drug efflux or influx transporters have been reported.
These observations have established the rationale for the creation of new compounds that have been explored in clinical trials. This review will discuss the underlying mechanisms of imatinib-resistance and new strategies to avoid and overcome this phenomenon.
Document Type: Research Article
Publication date: 2009-03-01
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- Cardiovascular & Hematological Disorders - Drug Targets aims to cover all the latest and outstanding developments on the medicinal chemistry, pharmacology, molecular biology, genomics and biochemistry of contemporary molecular targets involved in cardiovascular and hematological disorders e.g. disease specific proteins, receptors, enzymes, genes. Each issue of the journal will contain a series of timely in-depth reviews written by leaders in the field covering a range of current topics on drug targets involved in cardiovascular and hematological disorders. As the discovery, identification, characterization and validation of novel human drug targets for cardiovascular and hematological drug discovery continues to grow; this journal will be essential reading for all pharmaceutical scientists involved in drug discovery and development.