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The rho-kinase inhibitors Y-27632 and fasudil act synergistically with imatinib to inhibit the expansion of ex vivo CD34(+) CML progenitor cells.

Burthem J, Rees-Unwin KKS, Mottram R, Adams J, Lucas GS, Spooncer E, Whetton A, Whetton AD

Leukemia. 2007;.

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Evidence from cell line-based studies indicates that rho-kinase may play a role in the leukaemic transformation of human cells mediated by the BCR/ABL tyrosine kinase, manifest clinically as chronic myeloid leukaemia (CML). We therefore employed two separate inhibitors, Y-27632 and fasudil, to inhibit the activity of rho-kinase against ex vivo CD34(+) cells collected from patients with CML. We compared the effects of rho-kinase inhibition in those cells with the effects of direct inhibition of BCR/ABL using the specific inhibitor imatinib. We found that inhibition of rho-kinase inhibited the effective proliferation, and reduced survival of CML progenitor cells. When combined with imatinib, rho-kinase inhibition added to the anti-proliferative and pro-apoptotic effects of the BCR/ABL inhibitor. Our studies may indicate therapeutic benefit in some cases for the combination of rho-kinase inhibitors with imatinib.Leukemia advance online publication, 7 June 2007; doi:10.1038/sj.leu.2404762.

Record metadata

Manchester eScholar ID:
2nd September, 2009, 14:05:55
Last modified by:
Rees-Unwin, Karen
Last modified:
1st February, 2015, 19:17:58

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