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Journal of Biomedicine and Biotechnology
Volume 2010, Article ID 569053, 8 pages
http://dx.doi.org/10.1155/2010/569053
Research Article

Increased Expression of Ganglioside GM1 in Peripheral CD4+ T Cells Correlates Soluble Form of CD30 in Systemic Lupus Erythematosus Patients

1Department of Rheumatology and Immunology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095th Jiefang Avenue, Wuhan, Hubei 430030, China
2Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277th Jiefang Avenue, Wuhan, Hubei 430022, China
3Department of Clinical Laboratory, Kansai Electric Power Hospital, Osaka 555-0003, Japan
4Department of Hematology and Immunology, Kanazawa Medical University, Ishikawa 920-0265, Japan

Received 3 February 2010; Revised 14 April 2010; Accepted 26 April 2010

Academic Editor: Brian Poole

Copyright © 2010 Lingli Dong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Gangliosides GM1 is a good marker of membrane microdomains (lipid rafts) with important function in cellular activation processes. In this study we found that GM1 expression on CD4+ T cells and memory T cells (CD45RO/CD4) were dramatic increased after stimulation with phytohaemagglutinin in vitro. Next, we examined the GM1 expression on peripheral blood CD4+ T cells and CD8+ T cells from 44 patients with SLE and 28 healthy controls by flow cytometry. GM1 expression was further analyzed with serum soluble CD30 (sCD30), IL-10, TNF-alpha and clinical parameters. The mean fluorescence intensity of GM1 on CD4+ T cells from patients with SLE was significantly higher than those from healthy controls, but not on CD8+ T cells. Increased expression of GM1 was more marked on CD4+/CD45RO+ memory T cells from active SLE patients. Patients with SLE showed significantly elevated serum sCD30 and IL-10, but not TNF-alpha levels. In addition, we found that enhanced GM1 expression on CD4+ T cells from patients with SLE positively correlated with high serum levels of sCD30 and IgG as well as disease activity (SLEDAI scores). Our data suggested the potential role of aberrant lipid raft/GM1 on CD4+ T cells and sCD30 in the pathogenesis of SLE.