Dasatinib (BMS-354825) is a Src/ABL tyrosine kinase inhibitor currently approved for the treatment of chronic myeloid leukemia. Dasatinib has increased potency against ABL compared to the current therapy imatinib, and is effective in many cases where disease is resistant to imatinib. Dasatinib also inhibits many Src-family tyrosine kinases. We have demonstrated in this study that dasatinib is able to block the function of normal human T-lymphocytes in vitro at clinically relevant concentrations. T-cell functions including proliferation, activation and cytokine production were all uniformly inhibited in the presence of dasatinib. We also demonstrated inhibition of TCR signalling through Src-family kinase LCK, and predicted that inhibition of LCK and other kinases involved in T-cell signalling by dasatinib is responsible for the suppression of T-cell function. These findings raise the concern about potential T-cell inhibition in patients taking dasatinib, and suggest a possible application for the treatment of T-cell mediated immune disorders

Item Type:	Refereed Article
Research Division:	Medical and Health Sciences
Research Group:	Immunology
Research Field:	Cellular Immunology
Objective Division:	Health
Objective Group:	Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:	Immune System and Allergy
UTAS Author:	Lyons, AB (Associate Professor Bruce Lyons)
ID Code:	73629
Year Published:	2008
Web of Science® Times Cited:	64
Deposited By:	Medicine
Deposited On:	2011-10-19
Last Modified:	2011-10-19
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