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- W2148774610 endingPage "2022" @default.
- W2148774610 startingPage "2015" @default.
- W2148774610 abstract "Abstract Monoclonal anti-CD3 Abs have been used clinically for two decades to reverse steroid-resistant acute graft rejection. In autoimmune diabetes, short course treatment with FcR-nonbinding (FNB) anti-CD3 mAb in mice with recent onset of diabetes induces long-term disease remission. Induction of tolerogenic regulatory T cells (Tregs) has been implicated to be one of the mechanisms of action by FNB anti-CD3 mAb in these settings. In this study, we examined the effect of FNB anti-CD3 mAb treatment on the homeostasis of naive, effector, and regulatory T cells in vivo. Anti-CD3 treatment induced a transient systemic rise in the percentage but not absolute number of CD4+Foxp3+ Tregs due to selective depletion of CD4+Foxp3− conventional T cells. T cell depletion induced by FNB anti-CD3 mAb was independent of the proapoptotic proteins Fas, caspase-3, and Bim and was not inhibited by overexpression of the anti-apoptotic protein, Bcl-2. Tregs were not preferentially expanded and we found no evidence of conversion of conventional T cells into Tregs, suggesting that the pre-existing Tregs are resistant to anti-CD3–induced cell death. Interestingly, expression of the transcription factor Helios, which is expressed by thymus-derived natural Tregs, was increased in Tregs after FNB anti-CD3 mAb treatment, suggesting that the anti-CD3 treatment can alter, and potentially stabilize, Treg function. Taken together, the results suggest that FNB anti-CD3 therapy promotes tolerance by restoring the balance between pathogenic and regulatory T cells." @default.
- W2148774610 created "2016-06-24" @default.
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- W2148774610 date "2011-08-15" @default.
- W2148774610 modified "2023-10-11" @default.
- W2148774610 title "Anti-CD3 Therapy Promotes Tolerance by Selectively Depleting Pathogenic Cells while Preserving Regulatory T Cells" @default.
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- W2148774610 doi "https://doi.org/10.4049/jimmunol.1100713" @default.
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