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Differences in allergen-induced T cell activation between allergic asthma and rhinitis: Role of CD28, ICOS and CTLA-4.
- Source :
-
Respiratory research [Respir Res] 2011 Feb 28; Vol. 12, pp. 25. Date of Electronic Publication: 2011 Feb 28. - Publication Year :
- 2011
-
Abstract
- Background: Th2 cell activation and T regulatory cell (Treg) deficiency are key features of allergy. This applies for asthma and rhinitis. However with a same atopic background, some patients will develop rhinitis and asthma, whereas others will display rhinitis only. Co-receptors are pivotal in determining the type of T cell activation, but their role in allergic asthma and rhinitis has not been explored. Our objective was to assess whether allergen-induced T cell activation differs from allergic rhinitis to allergic rhinitis with asthma, and explore the role of ICOS, CD28 and CTLA-4.<br />Methods: T cell co-receptor and cytokine expressions were assessed by flow cytometry in PBMC from 18 house dust mite (HDM) allergic rhinitics (R), 18 HDM allergic rhinitics and asthmatics (AR), 13 non allergic asthmatics (A) and 20 controls, with or without anti-co-receptors antibodies.<br />Results: In asthmatics (A+AR), a constitutive decrease of CTLA-4+ and of CD4+CD25+Foxp3+ cells was found, with an increase of IFN-γ+ cells. In allergic subjects (R + AR), allergen stimulation induced CD28 together with IL-4 and IL-13, and decreased the proportion of CTLA-4+, IL-10+ and CD4+CD25+Foxp3+ cells. Anti-ICOS and anti-CD28 antibodies blocked allergen-induced IL-4 and IL-13. IL-13 production also involved CTLA-4.<br />Conclusions: T cell activation differs between allergic rhinitis and asthma. In asthma, a constitutive, co-receptor independent, Th1 activation and Treg deficiency is found. In allergic rhinitis, an allergen-induced Treg cell deficiency is seen, as well as an ICOS-, CD28- and CTLA-4-dependent Th2 activation. Allergic asthmatics display both characteristics.
- Subjects :
- Adult
Asthma diagnosis
CTLA-4 Antigen
Cells, Cultured
Cytokines metabolism
Female
Flow Cytometry
Humans
Hypersensitivity diagnosis
Inducible T-Cell Co-Stimulator Protein
Intradermal Tests
Male
Middle Aged
Rhinitis, Allergic, Perennial diagnosis
T-Lymphocytes, Regulatory immunology
Th1 Cells immunology
Th2 Cells immunology
Antigens, CD metabolism
Antigens, Dermatophagoides immunology
Antigens, Differentiation, T-Lymphocyte metabolism
Asthma immunology
CD28 Antigens metabolism
Hypersensitivity immunology
Lymphocyte Activation
Rhinitis, Allergic, Perennial immunology
T-Lymphocyte Subsets immunology
Subjects
Details
- Language :
- English
- ISSN :
- 1465-993X
- Volume :
- 12
- Database :
- MEDLINE
- Journal :
- Respiratory research
- Publication Type :
- Academic Journal
- Accession number :
- 21356099
- Full Text :
- https://doi.org/10.1186/1465-9921-12-25