Abstract
Grb7, a noncatalytic intracellular adaptor protein involved in cell migration, is overexpressed in certain invasive and metastatic solid tumors. We found a highly significant difference in the level of expression of Grb7 between chronic lymphocytic leukemia (CLL) cells obtained from stage I and stage IV patients (P<0.001). Using semiquantitative RT-PCR, we detected high levels of Grb7 in 88% of stage IV patients vs only 18% in stage I patients. A corresponding increase was found in the in vitro migration of stage IV CLL cells in comparison to stage I cells. The statistically significant difference in the expression of Grb7 between stage IV and stage I patients was preserved even when tested specifically in the ZAP70-positive group (P<0.01). These findings show that Grb7 levels reflect the severity of the disease, and may be used, in conjunction with ZAP70, to predict disease progression.
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Acknowledgements
This work was supported by a grant from the Israeli cancer foundation Abisch-Frenkel Foundation and by a joint grant from the Hebrew university and Kaplan Medical Center. We gratefully acknowledge the staff at the Kaplan Medical Center Hematology Institute, for their support in obtaining the blood samples.
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Haran, M., Chebatco, S., Flaishon, L. et al. Grb7 expression and cellular migration in chronic lymphocytic leukemia: a comparative study of early and advanced stage disease. Leukemia 18, 1948–1950 (2004). https://doi.org/10.1038/sj.leu.2403512
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DOI: https://doi.org/10.1038/sj.leu.2403512
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