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- W4313373408 abstract "Abstract The neonatal period is a natural scenario to study the effects of peripheral self-antigen (Ag) recognition by autoreactive conventional CD4+ T cells under conditions of low Foxp3+ T regulatory cell (Treg) numbers and function. Moreover, the neonatal environment is an interesting scenario to study the relationship between the induction of CD4+ T cell anergy and the peripheral generation of anergy-derived Tregs, given that anergy induction relies on normal Treg function whereas anergy-derived Treg generation is optimal in the setting of Treg cell deficiency. We have hypothesized that the neonatal period is both necessary and sufficient to allow for the induction of anergy as well as the peripheral differentiation of anergy-derived Foxp3+ Tregs from naive conventional CD4+ T cells during self-Ag recognition. To test our hypotheses we developed a system of neonatal peripheral tolerance induction. Neonatal pups engineered to express the experimental “self” peptide Ag chicken ovalbumin (OVAp) were given OVAp/I-Ab–specific OT-II CD4+ T cells, and the pups were later examined for anergy induction, Treg differentiation, and development of autoimmunity. Our data demonstrate that in the neonatal period: 1) previously naive CD4+ T cells express markers of anergy following exposure to self-Ag, and a small fraction of these cells can be seen to differentiate to a Foxp3+ Treg phenotype, and 2) previously anergic CD4+ T cells typically retain their anergic phenotype but also give rise to a substantial fraction of Foxp3+ Tregs, and 3) animals remain free of autoimmune disease. These findings suggest that during the neonatal period peripheral Foxp3+ Treg cell differentiation may proceed through a conventional anergic CD4+ T cell intermediate." @default.
- W4313373408 created "2023-01-06" @default.
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- W4313373408 date "2020-05-01" @default.
- W4313373408 modified "2023-09-27" @default.
- W4313373408 title "Anergy-derived Foxp3+ T regulatory cell differentiation in the neonatal mouse" @default.
- W4313373408 doi "https://doi.org/10.4049/jimmunol.204.supp.228.6" @default.
- W4313373408 hasPublicationYear "2020" @default.
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