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- W1569185562 abstract "Abstract We studied the TCR/CD3 complex-mediated signal transduction pathway in freshly isolated T cells and T cell lines from patients with systemic lupus erythematosus (SLE). The peak and 5-min anti-CD3 mAb-mediated free intracytoplasmic Ca2+ concentration ([Ca2+]i) increase was statistically significant higher in fresh T cells from SLE patients than in control T cells. Increased CD3-mediated [Ca2+]i responses were observed in T cells from patients with SLE but not in T cells from other rheumatic diseases. Furthermore, significantly increased CD3-mediated [Ca2+]i responses were observed in T cell lines from SLE patients but not from controls. Although the [Ca2+]i response did not correlate with the global SLE disease activity or individual clinical manifestations, it was significantly higher in the group of patients who were not on treatment. Both CD4+ and CD8+ T cell subsets from peripheral blood cells and T cell lines displayed higher CD3-mediated [Ca2+]i responses than their normal counterparts. The peak of the response occurred earlier in the patient than in the normal group. The amount of Ca2+ that was released from the intracellular stores was higher in lupus than control T cells. The TCR/CD3-induced production of inositol phosphate metabolites in SLE cells was comparable with controls. The sarcoplasmic and endoplasmic reticulum Ca(2+)-ATPase inhibitor thapsigargin-induced [Ca2+]i response was similar in both SLE and normal T cells. Our experiments demonstrate for the first time a definite abnormality in the early steps of the TCR/CD3-mediated signal transduction pathway in T cells from SLE patients that involves increased release of Ca2+ from intracellular stores." @default.
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- W1569185562 title "TCR/CD3 complex-mediated signal transduction pathway in T cells and T cell lines from patients with systemic lupus erythematosus." @default.
- W1569185562 doi "https://doi.org/10.4049/jimmunol.155.4.2269" @default.
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