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• W2038150223 abstract "Transcriptional characteristics of CD4+ T cells in young asthmatic children: RORC and FOXP3 axis Agnes Hamzaoui1,2,*, Haïfa Maalmi1,*, Anissa Berraïes1,2, Hanadi Abid1,2, Jamel Ammar1,2, Kamel Hamzaoui11Department of Pediatrics and Respiratory Disease, Homeostasis and Cell Dysfunction Unit Research, Abderrahman Mami Hospital, Ariana, Tunisia; 2Faculty of Medicine of Tunis, Tunis El Manar University, Tunis, Tunisia, , *These authors contributed to this work equallyBackground: Asthma is a chronic inflammatory disorder, hypothetically caused by autoreactive Th2 cells, whereas Th1 and regulatory T cells may confer protection. The development of Th subpopulations is dependent on the expression of lineage-specific transcription factors.Purpose: This study aimed to assess the balance of CD4+ T cell populations in asthmatic children.Methods: Peripheral blood mononuclear cells (PBMC) mRNA expression was assessed in 30 asthmatic children (18 patients with mild asthma and 12 with moderate asthma). Real-time polymerase chain reaction (RT-PCR) quantified TBX21, GATA-3, RORC, FOXP3, and EBI3 mRNA expression. Intracellular cytokine expression of IL-2, IL-4, IL-10, and IFN-γ in CD4+ T cells in asthmatic children was measured by flow cytometry. IL-6 and IL-17 cytokines were assessed in serum by enzyme-linked immunosorbent assay (ELISA).Results: A significant increase was found in the percentage of CD4+ and CD8+ T cell-producing IL-4, IL-6, and IL-17. A decreased percentage of CD4+ producing IFN-γ in asthmatic children was found. Expression of GATA-3 (Th2), retinoid-related orphan receptor C (RORC) (Th17), and EBI3 were increased in asthmatic patients compared to healthy controls. Expression of FOXP3 (Treg) and TBX21 (Th1) were decreased (P < 0.0001 and P < 0.0001) in asthmatic children. Analysis of transcription factor ratios revealed an increase in the RORC/FOXP3 (P = 0.0001), and a significant decrease of TBX21/GATA-3 (P = 0.0001) ratios in patients with asthma.Conclusion: Young asthmatics were characterized by increased IL-4 production and low IFN-γ synthesis. The increased serum IL-17 and IL-6 levels sustained an inflammatory environment in young asthmatics. The results indicate that FOXP3 and RORC mRNA expression could be associated with the sustained inflammatory process, transduced by low immune tolerance by Treg cells. The TBX21/GATA-3 and RORC/FOXP3 ratios dysregulation in asthmatics is consistent with the plasticity existing between Th1, Th17, and Treg cells during inflammation.Keywords: RORC, FOXP3, asthma, transcription factors" @default.
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• W2038150223 date "2011-11-01" @default.
• W2038150223 modified "2023-09-28" @default.
• W2038150223 title "Transcriptional characteristics of CD4+ T cells in young asthmatic children: RORC and FOXP3 axis" @default.
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• W2038150223 doi "https://doi.org/10.2147/jir.s25314" @default.
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