Lege Artis Medicinae

[THE IMMUNPATHOGENESIS OF VASCULITIDES]

ZEHER Margit

FEBRUARY 20, 2005

Lege Artis Medicinae - 2005;15(02)

[The vasculitides are clinicopathologic entities characterized by the inflammation and damage to blood vessels. Most vasculitic syndromes are mediated by immunopathogenic mechanisms. Most immune vasculitides are idiopathic (“primary vasculitis”) and systemic. The “immune vasculitides” are classified according to their hypersensitivity reaction types: allergic angiitis, antineutrophil cytoplasmic antibody (ANCA) -associated vasculitis, immunecomplex vasculitis, and vasculitis associated with T cell-mediated hypersensitivity. Immunological features: eosinophilia plus elevated IgE are characteristic of allergic angiitis and granulomatosis (Churg-Strauss syndrome). No immune deposits can be found in situ in ANCA associated vasculitis (“pauci-immune vasculitis”). Immune complex deposits, by contrast, are the hallmark of immune-complex vasculitis, which is frequently associated with low complement levels. Inflammatory infiltration induced by Th1 cells distinguishes vasculitis associated with T cell-mediated hypersensitivity (granulomatous arteritis). This article is dealing with the immunological mechanisms which may play a central role in the development of vasculitides.]

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