Increased expression of ganglioside GM1 in peripheral CD4+ T cells correlates soluble form of CD30 in Systemic Lupus Erythematosus patients.

Increased expression of ganglioside GM1 in peripheral CD4+ T cells correlates soluble form of CD30 in Systemic Lupus Erythematosus patients.
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DOI:
10.1155/2010/569053
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发表时间:
2010
影响因子:
--
通讯作者:
Umehara H
Umehara H
中科院分区:
其他
文献类型:
--
作者:
Dong L;Hu S;Chen F;Lei X;Tu W;Yu Y;Yang L;Sun W;Yamaguchi T;Masaki Y;Umehara H

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神经节苷脂 GM1 是膜微区(脂筏)的良好标记物,在细胞激活过程中具有重要功能。在这项研究中,我们发现在体外用植物血凝素刺激后,CD4+ T 细胞和记忆 T 细胞 (CD45RO/CD4) 上的 GM1 表达显着增加。接下来,我们通过流式细胞术检测了 44 名 SLE 患者和 28 名健康对照者外周血 CD4+ T 细胞和 CD8+ T 细胞上 GM1 的表达。通过血清可溶性 CD30 (sCD30)、IL-10、TNF-α 和临床参数进一步分析 GM1 表达。 SLE 患者 CD4+ T 细胞上的 GM1 平均荧光强度显着高于健康对照者,但 CD8+ T 细胞上的 GM1 平均荧光强度则不然。活动性 SLE 患者的 CD4+/CD45RO+ 记忆 T 细胞上 GM1 表达的增加更为明显。 SLE 患者的血清 sCD30 和 IL-10 水平显着升高,但 TNF-α 水平没有显着升高。此外,我们发现 SLE 患者 CD4+ T 细胞上 GM1 表达增强与高血清 sCD30 和 IgG 水平以及疾病活动度(SLEDAI 评分)呈正相关。我们的数据表明异常脂筏/GM1 对 CD4+ T 细胞和 sCD30 在 SLE 发病机制中的潜在作用。
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.
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