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Clinical Rheumatology

Erschienen in:

01.09.2007 | Original Article

Decreased expressions of the TNF-alpha signaling adapters in peripheral blood mononuclear cells (PBMCs) are correlated with disease activity in patients with systemic lupus erythematosus

verfasst von: Langjing Zhu, Xiao Yang, Weiying Chen, Xiaoyan Li, Yulian Ji, Haiping Mao, Jing Nie, Xueqing Yu

Erschienen in: Clinical Rheumatology | Ausgabe 9/2007

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Abstract

Tumor necrosis factor (TNF)-alpha is a pleiotropic cytokine. Systemic lupus erythematosus (SLE) is an autoimmune and inflammatory disease. However, until now, the expression and pathophysiological role of TNF adapters in SLE have been poorly understood. This study aims to investigate the expression of mRNA for the TNF adapter proteins including TNF receptor-associated death domain (TRADD) protein, Fas-associated death domain (FADD) protein, receptor-interacting protein 1 (RIP-1), and TNF receptor-associated factor-2 (TRAF-2) in peripheral blood mononuclear cells (PBMCs) from patients with SLE and to explore the relationship between the expression of these adapters and the SLE disease activity. PBMCs were isolated from the venous blood of 51 SLE patients and 17 healthy subjects. The expression of mRNA for TNF adapter molecules such as TRADD, FADD, RIP-1, and TRAF-2 in PBMCs were analyzed by semiquantitative reverse transcription-polymerase chain reaction (RT–PCR) and quantitative real-time RT–PCR. There were constitutive expressions of mRNA for TRADD, FADD, RIP-1, and TRAF-2 in PBMCs from healthy subjects. The expression of mRNA for all the adapter molecules significantly decreased in PBMCs from patients with SLE, which were 0.38-, 0.69-, 0.59-, and 0.55-fold, respectively, compared to those of control subjects (P < 0.05). The expression of Caspase 3 was significantly increased in SLE patients (P < 0.01); however, the expression of IL-1beta was not significantly different between SLE and control subjects. The expression of TRADD, FADD, RIP-1, and TRAF-2 in PBMCs from patients with SLE were negatively correlated with SLEDAI, the correlation coefficient of which was −0.285, −0.280, −0.307, and −0.298, respectively (P < 0.05). The expression of mRNA for TNF adapter molecules TRADD, FADD, RIP-1, and TRAF-2 decreased significantly in PBMCs from patients with SLE, and the expression of these adapters were negatively correlated with the SLE activity index. These abnormalities may be involved in the immunopathogenic injury mediated by the aberration TNF-alpha signaling pathway in SLE.

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Titel: Decreased expressions of the TNF-alpha signaling adapters in peripheral blood mononuclear cells (PBMCs) are correlated with disease activity in patients with systemic lupus erythematosus
verfasst von: Langjing Zhu
Xiao Yang
Weiying Chen
Xiaoyan Li
Yulian Ji
Haiping Mao
Jing Nie
Xueqing Yu
Publikationsdatum: 01.09.2007
Verlag: Springer-Verlag
Erschienen in: Clinical Rheumatology / Ausgabe 9/2007
Print ISSN: 0770-3198
Elektronische ISSN: 1434-9949
DOI: https://doi.org/10.1007/s10067-006-0531-8

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Decreased expressions of the TNF-alpha signaling adapters in peripheral blood mononuclear cells (PBMCs) are correlated with disease activity in patients with systemic lupus erythematosus

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