NFAT factors are dispensable for the development but are critical for the maintenance of Foxp3\(^+\) regulatory T cells
Please always quote using this URN: urn:nbn:de:bvb:20-opus-270668
- The transcription factors of the nuclear factor of activated T cell (NFAT) family play a crucial role in multiple aspects of T cell function. It has recently been reported that NFATs play an important role in the suppressive function of CD4\(^+\)CD25\(^+\)Foxp3\(^+\) regulatory T (T\(_{reg}\)) cells. In this study, we have investigated the role of NFATs in the thymic development of T\(_{reg}\) cells in mice. We show that NFAT factors are dispensable for the development of Foxp3\(^+\) T\(_{reg}\) cells in the thymus but are critical for theThe transcription factors of the nuclear factor of activated T cell (NFAT) family play a crucial role in multiple aspects of T cell function. It has recently been reported that NFATs play an important role in the suppressive function of CD4\(^+\)CD25\(^+\)Foxp3\(^+\) regulatory T (T\(_{reg}\)) cells. In this study, we have investigated the role of NFATs in the thymic development of T\(_{reg}\) cells in mice. We show that NFAT factors are dispensable for the development of Foxp3\(^+\) T\(_{reg}\) cells in the thymus but are critical for the maintenance of both the phenotype and survival of T\(_{reg}\) cells in the thymus as well as in peripheral lymphoid organs. Specifically, the homeostasis of CD4\(^+\)CD25\(^+\)Foxp3\(^+\) but not the CD4\(^+\)CD25\(^-\)Foxp3\(^+\) fraction is severely perturbed when NFAT signaling is blocked, leading to a strongly reduced T\(_{reg}\) population. We underscored this intriguing effect of NFAT on CD4\(^+\)CD25\(^+\)Foxp3\(^+\) T\(_{reg}\) cells to the disruption of survival signals provided by interleukin 2 (IL-2). Accordingly, blocking T\(_{reg}\) cell death by abolishing the activity of pro-apoptotic Bcl-2 family member Bim, compensated for the survival defects induced due to a lack of NFAT-IL-2-IL-2R signaling. Inhibition of NFAT activity led to a strong reduction in the number of Foxp3\(^+\) T\(_{reg}\) cells; however, it did not influence the level of Foxp3 expression on an individual cell basis. In addition, we show a differential effect of IL-2 and IL-7 signaling on Foxp3\(^+\) T\(_{reg}\) versus CD4\(^+\)CD25\(^-\) T cell development, again underlining the dispensability of NFAT signaling in the development, but not in the maintenance of Foxp3\(^+\) T\(_{reg}\) cells.…
Author: | Carlotta Barahona de Brito, Amiya Kumar Patra |
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URN: | urn:nbn:de:bvb:20-opus-270668 |
Document Type: | Journal article |
Faculties: | Medizinische Fakultät / Pathologisches Institut |
Language: | English |
Parent Title (English): | Cells |
ISSN: | 2073-4409 |
Year of Completion: | 2022 |
Volume: | 11 |
Issue: | 9 |
Article Number: | 1397 |
Source: | Cells (2022) 11:9, 1397. https://doi.org/10.3390/cells11091397 |
DOI: | https://doi.org/10.3390/cells11091397 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie |
6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit | |
Tag: | NFAT; T\(_{reg}\) and Foxp3; cyclosporine A; thymocytes |
Release Date: | 2023/05/30 |
Date of first Publication: | 2022/04/20 |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |