The p38 mitogen-activated protein kinase signaling cascade in CD4 T cells

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作者
Francis Dodeller
Hendrik Schulze-Koops
机构
[1] University of Erlangen-Nuremberg,Nikolaus Fiebiger Center for Molecular Medicine, Clinical Research Group III, and Department of Internal Medicine III
关键词
Tumor Necrosis Factor Production; GADD45 Protein; Tumor Necrosis Factor Expression; Proinflammatory Cytokine Tumor Necrosis Factor; Cytokine Gene Transcription;
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摘要
Since the identification of the p38 mitogen-activated protein kinase (MAPK) as a key signal-transducing molecule in the expression of the proinflammatory cytokine tumor necrosis factor (TNF) more than 10 years ago, huge efforts have been made to develop inhibitors of p38 MAPK with the intent to modulate unwanted TNF activity in diseases such as autoimmune diseases or sepsis. However, despite some anti-inflammatory effects in animal models, no p38 MAPK inhibitor has yet demonstrated clinical efficacy in human autoimmune disorders. One possible reason for this paradox might relate to the fact that the p38 MAPK signaling cascade is involved in the functional regulation of several different cell types that all contribute to the complex pathogenesis of human autoimmune diseases. In particular, p38 MAPK has a multifaceted role in CD4 T cells that have been implicated in initiating and driving sustained inflammation in autoimmune diseases, such as rheumatoid arthritis or systemic vasculitis. Here we review recent advances in the understanding of the role of the p38 MAPK signaling cascade in CD4 T cells and the consequences that its inhibition provokes in T cell functions in vitro and in vivo. These new data suggest that p38 MAPK inhibitors may elicit several unwanted effects in human autoimmune diseases but may be useful for the treatment of allergic disorders.
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