Src tyrosine kinase regulates adhesion and chemotaxis in Waldenstrom macroglobulinemia

Hai T. Ngo, Abdel Kareem Azab, Mena Farag, Xiaoying Jia, Molly M. Melhem, Judith Runnels, Aldo M. Roccaro, Feda Azab, Antonio Sacco, Xavier Leleu, Kenneth C. Anderson, Irene M. Ghobrial

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Purpose: Waldenstrom macroglobulinemia is a lymphoplasmacytic lymphoma characterized by widespread involvement of the bone marrow. Despite different options of therapy, Waldenstrom macroglobulinemia is still incurable. Src tyrosine kinase has been shown to play a central role in the regulation of a variety of biological processes, such as cell proliferation, migration, adhesion, and survival in solid tumors. We sought to determine whether the protein tyrosine kinase Src regulates adhesion, migration, and survival in Waldenstrom macroglobulinemia. Experimental Design: We tested the expression of Src tyrosine kinase in Waldenstrom macroglobulinemia and normal cells, and the effect of the specific Src inhibitor AZD0530 on the adhesion, migration, cell cycle, and survival of a Waldenstrom macroglobulinemia cell line and patient samples. Moreover, we tested the effect of AZD0530 on cytoskeletal and cell cycle signaling in Waldenstrom macroglobulinemia. Results: We show that Src is overexpressed in Waldenstrom macroglobulinemia cells compared with control B cells, and that the use of the Src inhibitor AZD0530 led to significant inhibition of adhesion, migration, and cytoskeletal signaling induced by SDF1. Moreover, inhibition of Src activity induced G1 cell cycle arrest; however, it had minimal effect on survival of Waldenstrom macroglobulinemia cells, and no significant effect on survival of normal cells. Conclusions: Taken together, these results delineate the role of Src kinase activity in Waldenstrom macroglobulinemia and provide the framework for future clinical trials using Src inhibitors in combination with other drugs to improve the outcome of patients with Waldenstrom macroglobulinemia.

Original languageEnglish
Pages (from-to)6035-6041
Number of pages7
JournalClinical Cancer Research
Volume15
Issue number19
DOIs
StatePublished - Oct 1 2009

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