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Mini-Reviews in Medicinal Chemistry


ISSN (Print): 1389-5575
ISSN (Online): 1875-5607

Review Article

Chronic Myeloid Leukemia: Existing Therapeutic Options and Strategies to Overcome Drug Resistance

Author(s): Vivek Kumar Singh and Mohane Selvaraj Coumar*

Volume 19, Issue 4, 2019

Page: [333 - 345] Pages: 13

DOI: 10.2174/1389557518666181017124854

Price: $65


Chronic myeloid leukemia (CML) is a myeloproliferative disease caused due to translocation between chromosome 9 and 22 leading to a chimeric gene product known as Bcr-Abl. Bcr-Abl fusion protein has constitutively activated Abl tyrosine kinase activity which is responsible for the uncontrolled proliferation in CML The tyrosine kinase inhibitors (TKIs) such as Imatinib, Dasatinib, and Nilotinib are the current first-line treatments approved by the United States Food and Drug Administration (US FDA) for the treatment of the disease. Despite the spectacular progress made over the decade with the TKIs, patients develop resistance to these TKIs. In such cases, stem cell transplant therapy, which is limited by donor availability, is the only proven cure for the patients. This highlights the need for the development of new strategies for CML treatment. The Bcr-Abl point mutations, including the gatekeeper T315I mutations, are the principal cause for the development of resistance to TKIs. However, other mechanisms are also involved in the failure of TKI therapy. This review outlines the Bcr-Abl dependent and independent mechanism of TKIs resistance development and the strategies used to overcome drug resistance, such as the development of ATP site and allosteric site inhibitors. Binding mode and structural elements of Bcr-Abl inhibition are discussed with emphasis on pathways involved in this complex disease to determine alternative strategies and combination therapies.

Keywords: ATP competitive inhibitor, allosteric inhibitor, Bcr-Abl, chronic myeloid leukaemia, drug resistance, T315I mutation, tyrosine kinase inhibitor.

Graphical Abstract
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