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Transcriptional characteristics of CD4(+) T cells in young asthmatic children: RORC and FOXP3 axis

BACKGROUND: 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 t...

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Autores principales: Hamzaoui, Agnes, Maalmi, Haïfa, Berraïes, Anissa, Abid, Hanadi, Ammar, Jamel, Hamzaoui, Kamel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Dove Medical Press 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3259694/
https://www.ncbi.nlm.nih.gov/pubmed/22259252
http://dx.doi.org/10.2147/JIR.S25314
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author Hamzaoui, Agnes
Maalmi, Haïfa
Berraïes, Anissa
Abid, Hanadi
Ammar, Jamel
Hamzaoui, Kamel
author_facet Hamzaoui, Agnes
Maalmi, Haïfa
Berraïes, Anissa
Abid, Hanadi
Ammar, Jamel
Hamzaoui, Kamel
author_sort Hamzaoui, Agnes
collection PubMed
description BACKGROUND: 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.
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spelling pubmed-32596942012-01-18 Transcriptional characteristics of CD4(+) T cells in young asthmatic children: RORC and FOXP3 axis Hamzaoui, Agnes Maalmi, Haïfa Berraïes, Anissa Abid, Hanadi Ammar, Jamel Hamzaoui, Kamel J Inflamm Res Original Research BACKGROUND: 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. Dove Medical Press 2011-11-11 /pmc/articles/PMC3259694/ /pubmed/22259252 http://dx.doi.org/10.2147/JIR.S25314 Text en © 2011 Hamzaoui et al, publisher and licensee Dove Medical Press Ltd. This is an Open Access article which permits unrestricted noncommercial use, provided the original work is properly cited.
spellingShingle Original Research
Hamzaoui, Agnes
Maalmi, Haïfa
Berraïes, Anissa
Abid, Hanadi
Ammar, Jamel
Hamzaoui, Kamel
Transcriptional characteristics of CD4(+) T cells in young asthmatic children: RORC and FOXP3 axis
title Transcriptional characteristics of CD4(+) T cells in young asthmatic children: RORC and FOXP3 axis
title_full Transcriptional characteristics of CD4(+) T cells in young asthmatic children: RORC and FOXP3 axis
title_fullStr Transcriptional characteristics of CD4(+) T cells in young asthmatic children: RORC and FOXP3 axis
title_full_unstemmed Transcriptional characteristics of CD4(+) T cells in young asthmatic children: RORC and FOXP3 axis
title_short Transcriptional characteristics of CD4(+) T cells in young asthmatic children: RORC and FOXP3 axis
title_sort transcriptional characteristics of cd4(+) t cells in young asthmatic children: rorc and foxp3 axis
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3259694/
https://www.ncbi.nlm.nih.gov/pubmed/22259252
http://dx.doi.org/10.2147/JIR.S25314
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