Utilize este identificador para referenciar este registo: https://hdl.handle.net/10316/12314
Título: Alterations in peripheral blood memory B cells in patients with active rheumatoid arthritis are dependent on the action of tumour necrosis factor
Autor: Souto-Carneiro, M. Margarida 
Mahadevan, Vijayabhanu 
Takada, Kazuki 
Fritsch-Stork, Ruth 
Nanki, Toshihiro 
Brown, Margaret 
Fleisher, Thomas A. 
Wilson, Mildred 
Goldbach-Mansky, Raphaela 
Lipsky, Peter E. 
Data: 5-Jun-2009
Editora: BioMed Central
Citação: Arthritis Research & Therapy. 11:3 (2009)
Resumo: INTRODUCTION: Disturbances in peripheral blood memory B cell subpopulations have been observed in various autoimmune diseases, but have not been fully delineated in rheumatoid arthritis (RA). Additionally, the possible role of tumour necrosis factor (TNF) in regulating changes in specific peripheral blood memory B cell subsets in RA is still unclear. METHODS: The frequency and distribution of B cell subsets in the peripheral blood and synovial membrane of active RA patients with long-standing disease have been analysed. Additionally, the possible role of TNF in causing disturbances in memory B cell subsets in RA patients was assessed in a clinical trial with the specific TNF-neutralising antibody, infliximab. RESULTS: RA patients, independent of disease duration, have a significantly lower frequency of peripheral blood pre-switch IgD+CD27+ memory B cells than healthy individuals, whereas post-switch IgD-CD27+ accumulate with increased disease duration. Notably, both pre-switch IgD+CD27+ and post-switch IgD-CD27+ memory B cells accumulate in the synovial membrane of RA patients. Finally, anti-TNF therapy increased the frequency of pre-switch IgD+CD27 memory B cells in the peripheral blood. CONCLUSIONS: The data suggest that decreases in peripheral blood IgD+CD27+ pre-switch memory B cells in RA reflect their accumulation in the synovial tissue. Moreover, the significant increase in the peripheral blood pre-switch memory B cells in patients who underwent specific TNF-blockade with infliximab indicates that trafficking of memory B cells into inflamed tissue in RA patients is regulated by TNF and can be corrected by neutralising TNF
URI: https://hdl.handle.net/10316/12314
ISSN: 1478-6354
DOI: 10.1186/ar2718
Direitos: openAccess
Aparece nas coleções:FCTUC Ciências da Vida - Artigos em Revistas Internacionais

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