T regulatory cell-associated tolerance induction by high-dose immunoglobulins in an HLA-transgenic mouse model of pemphigus
Pemphigus vulgaris (PV) is a potentially lethal autoimmune bullous skin disorder caused by IgG autoantibodies against desmoglein 3 (Dsg3) and Dsg1. During the last three decades, high-dose intravenous immunoglobulins (IVIgs) have been applied as an effective and relatively safe treatment regime in s...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
8 May 2023
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| In: |
Cells
Year: 2023, Jahrgang: 12, Heft: 9, Pages: 1-12 |
| ISSN: | 2073-4409 |
| DOI: | 10.3390/cells12091340 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.3390/cells12091340 Verlag, kostenfrei, Volltext: https://www.mdpi.com/2073-4409/12/9/1340 
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| Verfasserangaben: | Christoph Hudemann, Jochen Hoffmann, Enno Schmidt, Michael Hertl and Rüdiger Eming |
MARC
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| 245 | 1 | 0 | |a T regulatory cell-associated tolerance induction by high-dose immunoglobulins in an HLA-transgenic mouse model of pemphigus |c Christoph Hudemann, Jochen Hoffmann, Enno Schmidt, Michael Hertl and Rüdiger Eming |
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| 520 | |a Pemphigus vulgaris (PV) is a potentially lethal autoimmune bullous skin disorder caused by IgG autoantibodies against desmoglein 3 (Dsg3) and Dsg1. During the last three decades, high-dose intravenous immunoglobulins (IVIgs) have been applied as an effective and relatively safe treatment regime in severe, therapy-refractory PV. This prompted us to study T- and B- cell polarization by IVIg in a human-Dsg3-dependent mouse model for PV. Using humanized mice transgenic for HLA-DRB1*04:02, which is a highly prevalent haplotype in PV, we employed IVIg in two different experimental approaches: in prevention and quasi-therapeutic settings. Our data show that intraperitoneally applied IVIg was systemically distributed for up to 42 days or longer. IVIg-treated Dsg3-immunized mice exhibited, in contrast to Dsg3-immunized mice without IVIg, significantly less Dsg3-specific IgG, and showed induction of T regulatory cells in lymphatic tissue. Ex vivo splenocyte analysis upon Dsg3-specific stimulation revealed an initial, temporarily reduced antigen-induced cell proliferation, as well as IFN-γ secretion that became less apparent over the course of time. Marginal-zone B cells were initially reduced in the preventive approach but re-expanded over time. In contrast, in the quasi-therapeutic approach, a robust down-regulation in both spleen and lymph nodes was observed. We found a significant down-regulation of the immature transitional 1 (T1) B cells in IVIg-treated mice in the quasi-therapeutic approach, while T2 and T3, representing a healthy stage of B-cell development, appeared to be up-regulated by IVIg. In summary, in two experimental settings employing an active PV mouse model, we demonstrate distinct alterations of T- and B-cell populations upon IVIg treatment, compatible with a tolerance-associated polarization in lymphatic tissue. Our data suggest that the clinical efficacy of IVIg is at least modulated by distinct alterations of T- and B-cell populations compatible with a tolerance-associated polarization in lymphatic tissue. | ||
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| 700 | 1 | |a Eming, Rüdiger |e VerfasserIn |4 aut | |
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