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- W419083669 abstract "ANCA-associated systemic vasculitis (AASV) is a group of inflammatory disorders, characterized by inflammation and necrosis of blood vessels and frequently granuloma formation. Patients with AASV make autoantibodies, so called ANCA, against proteins present in the granules of neutrophils and monocytes, mainly proteinase 3 (PR3) and myeloperoxidase (MPO). Clinically, disease progression is characterized by a relapsing-remitting course. Although remitting in nature, disease flares can lead to permanent organ damage or even death. Moreover, the standard therapy of today, high-dose corticosteroids and cyclophospahamide, is associated with severe side effects like bladder cancer and severe infections and although effective in inducing remission, the relapse rates are high.The pathogenesis is still unknown and the importance of ANCA debated. In this thesis some fundamental aspects, like gene expression of the ANCA antigens and status of immune activation have been addressed. The main findings are those of a PR3-expression in circulating monocytes, 9-fold higher in our patients than in the controls, together with deranged circulating cytokine pattern. Most interestingly, these findings are present in patients who are in complete clinical remission, indicating some kind of basic defect in the immune system. A disability to resolve inflammatory processes would eventually lead to self-perpetuating grumbling activity, held back by local protease inhibitors like SLPI and inhibitory cytokines like IL-10. This would create a borderline environment, making it easy for some sort of unknown trigger, such as a virus or another environmental factor, to elicit a full blown inflammatory response. ANCA could, if present, probably fuel this process by interacting with antigens expressed on the surface of neutrophils and monocytes.Besides the pathogenic aspects, some of the results might have clinical implications. IL-6 seems to be a potential marker of imminent relapse and should be thoroughly evaluated as such in a larger patient study over a longer time period. IL-8, on the other hand, might be a prognostic marker, considering the strong association with impending organ damage. The finding of low IL-10 levels being associated with relapse tendency of course evokes interest in exploring its therapeutic potential." @default.
- W419083669 created "2016-06-24" @default.
- W419083669 creator A5026077042 @default.
- W419083669 date "2003-01-01" @default.
- W419083669 modified "2023-09-27" @default.
- W419083669 title "The Balance between Pro- and Antiinflammatory Molecules in ANCA-Associated Vasculitis" @default.
- W419083669 hasPublicationYear "2003" @default.
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