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- W2147044091 abstract "Background Proprotein convertase subtilisin/kexin (PCSK) enzymes cleave proproteins into mature end products. Previously, MBTPS1 and PCSK9 have been shown to regulate cholesterol metabolism and LDL receptor recycling, whereas FURIN and PCSK5 have been suggested to inactivate lipases and regulate inflammation in atherosclerosis. Here, we systematically analyzed the expression of PCSKs and their targets in advanced atherosclerotic plaques. Methods and results Microarray and quantitative real-time PCR experiments showed that FURIN (42.86 median fold, p = 2.1e−8), but no other PCSK, is universally overexpressed in the plaques of different vascular regions. The mRNA expression screen of PCSK target proteins in plaques identified many known factors, but it also identified the significant upregulation of the previously overlooked furin-processed B cell activating cytokines APRIL (TNFSF13, 2.52 median fold, p = 3.0e−5) and BAFF (TNFSF13B, 2.97 median fold, p = 7.6e−6). The dysregulation of FURIN did not associate with its htSNPs or the previously reported regulatory SNP (−229, rs4932178) in the promoter. Immunohistochemistry experiments showed the upregulation of FURIN in the plaque lymphocytes and macrophages where it was co-expressed with BAFF/TNFSF13B and APRIL/TNFSF13. Conclusions Our data unequivocally show that FURIN is the primary PCSK that is dysregulated in the immune cells of advanced human atherosclerotic plaques, which implies a role for this enzyme in plaque pathology. Therefore, drugs that inhibit FURIN in arteries may modulate the course of this disease." @default.
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- W2147044091 date "2011-12-01" @default.
- W2147044091 modified "2023-10-18" @default.
- W2147044091 title "Proprotein convertases in human atherosclerotic plaques: The overexpression of FURIN and its substrate cytokines BAFF and APRIL" @default.
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- W2147044091 doi "https://doi.org/10.1016/j.atherosclerosis.2011.08.011" @default.
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