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- W1875742425 abstract "Abstract In the current study, we investigated whether naturally occurring CD4+CD25+ T cells, separated by immunomagnetic anti-CD4 and anti-CD25 Abs from naive animals, are able to protect from experimental autoimmune myasthenia gravis (EAMG) and modify the progression of ongoing disease when administered to Torpedo californica acetylcholine receptor (AChR)-immunized Lewis rats. Even though CD4+CD25+ and CD4+CD25high T cell frequencies were similar in the spleens and lymph nodes of EAMG and healthy rats, we observed that CD4+CD25+ T cells isolated from the spleens of naive animals inhibited in vitro the Ag-induced proliferation of T cell lines specific to the self-peptide 97–116 of the anti-AChR subunit (R97-116), an immunodominant and myasthenogenic T cell epitope, whereas CD4+CD25+ T cells purified from the spleens of EAMG rats were less effective. CD4+CD25+ T cells from EAMG rats expressed less forkhead box transcription factor P3 but more CTLA-4 mRNA than healthy rats. Naive CD4+CD25+ T cells, obtained from naive rats and administered to T. californica AChR-immunized animals according to a preventive schedule of treatment, reduced the severity of EAMG, whereas their administration 4 wk postinduction of the disease, corresponding to the onset of clinical symptoms (therapeutic treatment), was not effective. We think that the exogenous administration of CD4+CD25+ naive T cells prevents the early events underlying the induction of EAMG, events linked to the T cell compartment (Ag recognition, epitope spreading, and T cell expansion), but fails to ameliorate ongoing EAMG, when the IgG-mediated complement attack to the AChR at the neuromuscular junction has already taken place." @default.
- W1875742425 created "2016-06-24" @default.
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- W1875742425 date "2010-11-01" @default.
- W1875742425 modified "2023-09-26" @default.
- W1875742425 title "Naturally Occurring CD4+CD25+ Regulatory T Cells Prevent but Do Not Improve Experimental Myasthenia Gravis" @default.
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- W1875742425 doi "https://doi.org/10.4049/jimmunol.0903183" @default.
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