Lck is a relevant target in chronic lymphocytic leukaemia cells whose expression variance is unrelated to disease outcome

Till, Kathleen J ORCID: 0000-0002-3172-5771, Allen, John C, Talab, Fatima, Lin, Ke, Allsup, David, Cawkwell, Lynn, Bentley, Alison, Ringshausen, Ingo, Duckworth, Andrew D, Pettitt, Andrew R
et al (show 2 more authors) (2017) Lck is a relevant target in chronic lymphocytic leukaemia cells whose expression variance is unrelated to disease outcome. SCIENTIFIC REPORTS, 7 (1). 16784-.

[img] Text
s41598-017-17021-w.pdf - Published version

Download (1MB)


Pathogenesis of chronic lymphocytic leukaemia (CLL) is contingent upon antigen receptor (BCR) expressed by malignant cells of this disease. Studies on somatic hypermutation of the antigen binding region, receptor expression levels and signal capacity have all linked BCR on CLL cells to disease prognosis. Our previous work showed that the src-family kinase Lck is a targetable mediator of BCR signalling in CLL cells, and that variance in Lck expression associated with ability of BCR to induce signal upon engagement. This latter finding makes Lck similar to ZAP70, another T-cell kinase whose aberrant expression in CLL cells also associates with BCR signalling capacity, but also different because ZAP70 is not easily pharmacologically targetable. Here we describe a robust method of measuring Lck expression in CLL cells using flow cytometry. However, unlike ZAP70 whose expression in CLL cells predicts prognosis, we find Lck expression and disease outcome in CLL are unrelated despite observations that its inhibition produces effects that biologically resemble the egress phenotype taken on by CLL cells treated with idelalisib. Taken together, our findings provide insight into the pathobiology of CLL to suggest a more complex relationship between expression of molecules within the BCR signalling pathway and disease outcome.

Item Type: Article
Uncontrolled Keywords: Cell Line, Tumor, Humans, Purines, Lymphocyte Specific Protein Tyrosine Kinase p56(lck), Receptors, Antigen, B-Cell, Prognosis, Flow Cytometry, Survival Analysis, Signal Transduction, Gene Expression Regulation, Leukemic, Quinazolinones, Leukemia, Lymphocytic, Chronic, B-Cell
Depositing User: Symplectic Admin
Date Deposited: 01 Dec 2017 16:30
Last Modified: 19 Jan 2023 06:48
DOI: 10.1038/s41598-017-17021-w
Related URLs: