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- W4313385181 abstract "Abstract Indoleamine 2,3-dioxygenase 1 (IDO1) is an enzyme involved in the initial step of tryptophan degradation along the kynurenine pathway. It has immunosuppressive effects, linked to enzymic and non-enzymic regulatory functions. IDO1 is also crucial for sustaining the function of T regulatory cells (Treg), which are involved in the establishment of peripheral tolerance. We recently found that defective IDO1 induction is associated to anti-FVIII antibody production in patients with severe Hemophilia A1. In hemophilic mice, CpG- rich oligodeoxynucleotides (CpG-ODN) administration induced IDO1 expression in dendritic cells (DCs) that control FVIII antibody response. Recently we discovered that CpG-ODN selectively induced IDO1 in a subset of conventional DCs (cDCs). IDO1 was found to be highly expressed in gut CD11C+CD103+ DCs, which are required for establishment of oral tolerance2. Based on these data we analyzed the impact of IDO1 deficiency in controlling antibody responses, in two different experimental models (FVIII and ovalbumin, OVA, immunization). Interestingly, IDO1 deficiency resulted in a significant increase of FVIII-specific antibody production relative to wild type controls. Similarly, IDO KO mice showed a significant immunoglobulin production in a model of OVA-induced oral tolerance. These data suggest the regulatory role of IDO1 in controlling antibody responses to self and non-self antigens." @default.
- W4313385181 created "2023-01-06" @default.
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- W4313385181 date "2017-05-01" @default.
- W4313385181 modified "2023-10-05" @default.
- W4313385181 title "IDO1 activity in selected immune cells controls antibody responses" @default.
- W4313385181 cites W2099259456 @default.
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- W4313385181 doi "https://doi.org/10.4049/jimmunol.198.supp.67.25" @default.
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