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- W2278157029 startingPage "1279" @default.
- W2278157029 abstract "Methotrexate (MTX) is a widely used treatment for inflammatory diseases such as rheumatoid arthritis and psoriasis, based on the concept that it is immunosuppressive. Its mechanism of action, however, remains unclear, although it is thought to depend on adenosine. Caffeine and theophylline, which have several targets including adenosine receptors, have been shown to suppress the beneficial clinical effects of MTX. Here we show that MTX and caffeine and theophylline differentially affect a motogenic T-cell mechanism driven by endogenous thrombospondin-1 (TSP-1) and its receptor, low density lipoprotein receptor-related protein 1 (LRP1). MTX stimulated TSP-1 expression and the motogenic TSP-1/TSP-1 receptor mechanism in primary human T cells, hence mimicking IL-2 and CXCL12, which similar to MTX, dampen inflammatory disease. SiRNA-mediated gene silencing of TSP-1 and LRP1 inhibited this stimulatory effect. Caffeine and theophylline inhibited the TSP-1/TSP-1 receptor mechanism by inhibiting LRP1 expression. These results indicate that the effect of MTX on T cells is immunoregulatory rather than immunosuppressive, and suggest a pathway dependent on TSP-1/TSP-1 receptor interactions for the regulation of immune responses." @default.
- W2278157029 created "2016-06-24" @default.
- W2278157029 creator A5039283725 @default.
- W2278157029 creator A5052346460 @default.
- W2278157029 creator A5081309492 @default.
- W2278157029 date "2016-04-13" @default.
- W2278157029 modified "2023-10-02" @default.
- W2278157029 title "Methotrexate and its therapeutic antagonists caffeine and theophylline, target a motogenic T-cell mechanism driven by thrombospondin-1 (TSP-1)" @default.
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- W2278157029 doi "https://doi.org/10.1002/eji.201546122" @default.
- W2278157029 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26909742" @default.