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- W4385265874 abstract "Summary Signalling events downstream the B‐cell receptor ( BCR ) are central for the survival and progression of chronic lymphocytic leukaemia ( CLL ) cells. Focal adhesion kinase ( FAK ), regulated through calpain, interacts with molecules of BCR signalling, cytoskeletal modelling and disease progression, such as Src/Lyn, cortactin and HS1 . Hypothesizing that FAK might play a key role in CLL pathogenesis, we observed a down‐modulation of FAK whole form, associated with FAK cleavage due to calpain activity upon BCR stimulation. Patients, whose cells were able to release Ca ++ after BCR stimulation, had less amount of full‐length FAK , which translated into a higher presence of cleaved/activated form of the protein phosphorylated at Y397 , these features being mostly shown by immunoglobulin heavy chain ( IGHV )‐unmutated poor‐prognosis patients. Moreover, we found that cortactin and HS1 proteins were overexpressed in those cells, suggesting a possible interplay with FAK . Treatment with the FAK inhibitor Defactinib was able to induce apoptosis in CLL cells. In conclusion, the malignant phenotype in unfavourable‐prognosis patients seems to be encouraged by the overexpression of cortactin and HS1 , that, together with FAK , may be involved in a druggable pathogenetic pathway in CLL ." @default.
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- W4385265874 date "2023-07-26" @default.
- W4385265874 modified "2023-10-14" @default.
- W4385265874 title "Focal adhesion kinase activation by calcium‐dependent calpain is involved in chronic lymphocytic leukaemia cell aggressiveness" @default.
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- W4385265874 doi "https://doi.org/10.1111/bjh.18996" @default.
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