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- W2023458311 abstract "CLL is an incurable disease with variable prognosis. The hyper reactivity of the B-cell receptor (BCR) to unknown antigen ligation plays a pivotal role in CLL-cell survival. We aimed to investigate the BCR signalling pathway using proteomics to identify novel proteins which may have clinical relevance in this disease.Three CLL samples were selected based upon BCR responsiveness, demonstrated by upregulation of phospho-ERK following in vitro stimulation. The differential expression of proteins, upon artificial stimulation of the BCR, was examined in these samples using two-dimensional gel electrophoresis in combination with mass spectrometry. Proteins of interest were subsequently examined using immunoblotting. Proteomic analysis revealed that kininogen, a critical protein of kinin–kallikrein system, was upregulated in all 3 clinical samples upon BCR stimulation. There are 2 forms of kininogen: HMWK and LMWK. The upregulation of LMWK upon BCR stimulation was confirmed by immunoblotting in all 3 of these samples. In a pilot series of 52 unselected CLL samples, 71% demonstrated basal LMWK expression. There was a trend towards shorter median survival in LMWK positive cases (147 months versus 253 months for LMWK negative cases; p = 0.125). Kininogen may be a novel therapeutic target in CLL and the possible association with prognosis warrants further investigation.We have identified the upregulation of LMWK upon BCR stimulation of CLL samples. There is no previous published research to suggest a link between kininogen and normal B-cells or CLL cells. In 52 unselected CLL samples, 71% demonstrated basal LMWK expression. There was a trend towards shorter median survival in LMWK positive cases. The absence of LMWK protein expression on normal B-cells suggests that this could be a biomarker for CLL and further research should be undertaken." @default.
- W2023458311 created "2016-06-24" @default.
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- W2023458311 date "1989-07-01" @default.
- W2023458311 modified "2023-09-24" @default.
- W2023458311 title "Identification of zona pellucida antigens involved in sperm binding" @default.
- W2023458311 doi "https://doi.org/10.1016/0165-0378(89)90157-5" @default.
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