OBJECTIVE: To investigate the phenotype of infiltrating cells in classic lesions of polyarteritis nodosa (PAN). METHODS: Twenty-one muscle and 10 sural nerve biopsy samples from 24 patients with systemic PAN were studied using avidin-biotin-peroxidase and alkaline phosphatase-anti-alkaline phosphatase immunohistochemical techniques. RESULTS: The inflammatory infiltrates consisted mainly of macrophages (41%) and T lymphocytes (41%), particularly of the CD4+ subset. Granulocytes were present in varying quantities (0-45%) and were more abundant in heavily infiltrated vessels and in those with fibrinoid necrosis. Dendritic cells could be identified in 4 samples. Proliferating and interleukin-2 receptor-expressing cells, present in 71% and 79% of the patients, respectively, were more frequent in untreated patients. CONCLUSION: T cell-mediated immune mechanisms may play a role in the development and perpetuation of PAN lesions.
OBJECTIVE: To investigate the phenotype of infiltrating cells in classic lesions of polyarteritis nodosa (PAN). METHODS: Twenty-one muscle and 10 sural nerve biopsy samples from 24 patients with systemic PAN were studied using avidin-biotin-peroxidase and alkaline phosphatase-anti-alkaline phosphatase immunohistochemical techniques. RESULTS: The inflammatory infiltrates consisted mainly of macrophages (41%) and T lymphocytes (41%), particularly of the CD4+ subset. Granulocytes were present in varying quantities (0-45%) and were more abundant in heavily infiltrated vessels and in those with fibrinoid necrosis. Dendritic cells could be identified in 4 samples. Proliferating and interleukin-2 receptor-expressing cells, present in 71% and 79% of the patients, respectively, were more frequent in untreated patients. CONCLUSION: T cell-mediated immune mechanisms may play a role in the development and perpetuation of PAN lesions.
Authors: Ester Roffê; Ana Paula M P Marino; Joseph Weaver; Wuzhou Wan; Fernanda F de Araújo; Victoria Hoffman; Helton C Santiago; Philip M Murphy Journal: Infect Immun Date: 2016-03-24 Impact factor: 3.441
Authors: Rosanne D Reitsema; Annemieke M H Boots; Kornelis S M van der Geest; Maria Sandovici; Peter Heeringa; Elisabeth Brouwer Journal: Front Immunol Date: 2021-03-18 Impact factor: 7.561