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- W1973703293 abstract "Cathepsins are involved in a variety of physiological processes including antigen processing and presentation and extracellular matrix degradation. In the present study, we evaluated whether expression levels of cathepsins S and B and their inhibitors cystatins B and C are affected by multiple sclerosis (MS) disease state (relapse and remission) and therapies (interferon-β [IFN-β] and the glucocorticoid [GC] methylprednisolone), and whether they are associated with the IFN-β response phenotype. Real-time PCR was employed to compare RNA expression levels in peripheral blood leucocytes (PBLs) and ELISA to determine serum protein levels of MS patients and matched healthy individuals. Cathepsin S RNA was higher in MS patients in the relapse state compared to controls (by 74%, P = 3 × 10(-5), n = 30 versus n = 18) with a similar increase observed in serum (66%, P = 0.002, n = 18 versus n = 20). GC treatment reduced cathepsin S levels in PBL RNA (by 44%, P = 6 × 10(-6), n = 27) and serum proteins (by 27%, P = 1 × 10(-5), n = 26), reduced the serum protein levels of pro-cathepsin B (by 8%, P = 0.0007, n = 23), and in parallel increased the serum levels of their inhibitor cystatin C (by 82%, P = 8 × 10(-6), n = 26). IFN-β therapy significantly elevated the RNA levels (n = 16) of cathepsin B (by 16%, P = 0.03), cystatin B (44%, P = 0.004) and cystatin C (48%, P = 0.011). In the serum, only cathepsin S levels were reduced by IFN-β (16%, P = 0.006, n = 25). Interestingly, pre-treatment serum cathepsin S/cystatin C ratio was higher in 'good responders' to IFN-β therapy compared to patients without a good response (by 94%, P = 0.003). These results suggest that cathepsin S and cystatin C may contribute to disease activity in MS, specifically in a subgroup of patients that are responsive to IFN-β therapy, and that these proteins should be further evaluated as biomarkers in MS." @default.
- W1973703293 created "2016-06-24" @default.
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- W1973703293 date "2011-10-24" @default.
- W1973703293 modified "2023-10-18" @default.
- W1973703293 title "Cathepsins and their endogenous inhibitors cystatins: expression and modulation in multiple sclerosis" @default.
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- W1973703293 doi "https://doi.org/10.1111/j.1582-4934.2010.01229.x" @default.
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