BACKGROUND: Autoimmune mechanisms are postulated to play a role in the development and progression of Wegener's granulomatosis (WG), a form of systemic, idiopathic necrotizing vasculitis. OBJECTIVE: We investigated the relation between lymphocyte activation and disease activity in patients with WG. METHODS: B- and T-lymphocyte activation was studied by cytometric assessment of the expression of the activation markers CD38 on B cells and CD25 and HLA-DR on CD4(+) and CD8(+) T-cell subsets, respectively. Activation at the cellular level was related to serum levels of antineutrophil cytoplasmic antibodies and soluble IL-2 receptor, which can be regarded as soluble activation markers of B and T cells. RESULTS: Percentages of CD38(bright) activated B cells were higher in patients with active WG than in patients experiencing disease remission (P <.05) or in healthy control subjects (P <.05). Percentages of activated CD4(+) and CD8(+) T cells were higher in patients with active WG (CD4 subset, P <.0001; CD8 subset, P <.005) than in healthy individuals. An increased percentage of activated T cells of both subsets was also seen in patients whose condition was in remission, as compared with healthy control subjects (CD4 subset, P <.0005; CD8 subset, P <. 001). Lymphocyte activation at the cellular level did not correlate with plasma levels of antineutrophil cytoplasmic antibodies or soluble IL-2 receptor. CONCLUSION: In WG, B-cell activation is related to active disease, whereas T-cell activation persists during remission of the disease, which points to an intrinsic disordered immune system in this disease.
BACKGROUND: Autoimmune mechanisms are postulated to play a role in the development and progression of Wegener's granulomatosis (WG), a form of systemic, idiopathic necrotizing vasculitis. OBJECTIVE: We investigated the relation between lymphocyte activation and disease activity in patients with WG. METHODS: B- and T-lymphocyte activation was studied by cytometric assessment of the expression of the activation markers CD38 on B cells and CD25 and HLA-DR on CD4(+) and CD8(+) T-cell subsets, respectively. Activation at the cellular level was related to serum levels of antineutrophil cytoplasmic antibodies and soluble IL-2 receptor, which can be regarded as soluble activation markers of B and T cells. RESULTS: Percentages of CD38(bright) activated B cells were higher in patients with active WG than in patients experiencing disease remission (P <.05) or in healthy control subjects (P <.05). Percentages of activated CD4(+) and CD8(+) T cells were higher in patients with active WG (CD4 subset, P <.0001; CD8 subset, P <.005) than in healthy individuals. An increased percentage of activated T cells of both subsets was also seen in patients whose condition was in remission, as compared with healthy control subjects (CD4 subset, P <.0005; CD8 subset, P <. 001). Lymphocyte activation at the cellular level did not correlate with plasma levels of antineutrophil cytoplasmic antibodies or soluble IL-2 receptor. CONCLUSION: In WG, B-cell activation is related to active disease, whereas T-cell activation persists during remission of the disease, which points to an intrinsic disordered immune system in this disease.
Authors: John H Stone; Peter A Merkel; Robert Spiera; Philip Seo; Carol A Langford; Gary S Hoffman; Cees G M Kallenberg; E William St Clair; Anthony Turkiewicz; Nadia K Tchao; Lisa Webber; Linna Ding; Lourdes P Sejismundo; Kathleen Mieras; David Weitzenkamp; David Ikle; Vicki Seyfert-Margolis; Mark Mueller; Paul Brunetta; Nancy B Allen; Fernando C Fervenza; Duvuru Geetha; Karina A Keogh; Eugene Y Kissin; Paul A Monach; Tobias Peikert; Coen Stegeman; Steven R Ytterberg; Ulrich Specks Journal: N Engl J Med Date: 2010-07-15 Impact factor: 91.245