Effect of Leflunomide on the Abnormal Expression of Lipid Rafts and F-Actin in B Lymphocytes from Patients with Systemic Lupus Erythematosus.

Abstract:

PURPOSES:To investigate the possible changes in B cell subsets and in B cell expression patterns of lipid rafts (LRs) and F-actin in patients with SLE and whether leflunomide treatment may have effect on these changes. METHODS:The B cell subsets and LRs expression were determined by flow cytometry and confocal microscopy, and F-actin expression was examined by confocal microscopy. RESULTS:CD27(+)IgD(+) B cell subsets were significantly decreased while CD38(+)CD95(+) B cell subsets increased in SLE patients. The LRs levels of B cells were remarkably increased and positively correlated with SLEDAI and anti-dsDNA titer in SLE patients. The expression level of LRs was significantly higher in CD38(+) B cells than CD38(-) B cells and negatively correlated with C3 levels. The increased expression of LRs was associated with reduced expression of F-actin in the B cells from active SLE patients. Furthermore, in vitro treatment of the cells with A771726 reduced the expression level of LRs, attenuated the overaggregation of LRs, and normalized the distribution of F-actin. CONCLUSIONS:There were abnormalities in B cell subsets and LRs and F-actin expression of B cell from SLE patients. Modulation of B cell expression of LRs and F-actin by LEF could be a potential therapeutic target for SLE.

journal_name

J Immunol Res

authors

Dong GF,Zhang X,He DN,Li L,Zhang GF

doi

10.1155/2015/832916

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

832916

eissn

2314-8861

issn

2314-7156

journal_volume

2015

pub_type

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