Abstract | OBJECTIVE: To study the B-cell content, organization, and existence of distinct B-cell subpopulations in relation to the expression of type 1 interferon signature related genes in dermatomyositis (DM). METHODS: Evaluation of skeletal muscle biopsies from patients with adult DM (aDM) and juvenile DM (jDM) by histology, immunohistochemistry, electron microscopy, and quantitative reverse-transcription PCR. RESULTS: We defined 3 aDM subgroups-classic (containing occasional B cells without clusters), B-cell-rich, and follicle-like aDM-further elucidating IM B-lymphocyte maturation and immunity. The quantity of B cells and formation of ectopic lymphoid structures in a subset of patients with aDM were associated with a specific profile of cytokines and chemokines involved in lymphoid neogenesis. Levels of type 1 interferon signature related gene expression paralleled B-cell content and architectural organization and link B-cell immunity to the interferon type I signature. CONCLUSION: These data corroborate the important role of B cells in DM, highlighting the direct link between humoral mechanisms as key players in B-cell immunity and the role of type I interferon-related immunity.
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Authors | Josefine Radke, Randi Koll, Corinna Preuße, Debora Pehl, Kremena Todorova, Constanze Schönemann, Yves Allenbach, Eleonora Aronica, Marianne de Visser, Frank L Heppner, Joachim Weis, Soroush Doostkam, Thierry Maisonobe, Olivier Benveniste, Hans-Hilmar Goebel, Werner Stenzel |
Journal | Neurology(R) neuroimmunology & neuroinflammation
(Neurol Neuroimmunol Neuroinflamm)
Vol. 5
Issue 3
Pg. e451
(May 2018)
ISSN: 2332-7812 [Print] United States |
PMID | 29520367
(Publication Type: Journal Article)
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