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Ueno-Yamanouchi A, Khan FM, Serushago B, Bowen T, Lu C, Luider J, Storek J. Allergen-specific T cell quantity in blood is higher in allergic compared to nonallergic individuals. Allergy Asthma Clin Immunol 2011; 7:6. [PMID: 21496322 PMCID: PMC3102632 DOI: 10.1186/1710-1492-7-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Accepted: 04/17/2011] [Indexed: 11/16/2022] Open
Abstract
Background Allergen-specific IgE production is a hallmark of allergic asthma/rhinitis/eczema. Theoretically this could be due to a high number of allergen-specific B cells or allergen-specific T cells helping allergen-specific B cells differentiate into IgE-producing plasma cells. Here, we determined whether the number of allergen-specific B cells or T helper (Th) cells is higher in allergic individuals compared to nonallergic individuals. Methods A total of 52 allergic individuals and 32 nonallergic individuals were studied. The allergen-specific B and Th cells were enumerated by culturing CFSE-loaded blood mononuclear cells for 7-days with allergen (cat, Timothy or birch), and determining the number of proliferating B or Th cells (diluting CFSE) by flow cytometry. Allergen-specific IgE concentration was determined by fluorescent enzymoimmunoassay (FEIA). Results The quantities of proliferating Th cells but not proliferating B cells specific for cat, Timothy and birch were significantly higher in cat-, Timothy- and birch-allergic individuals compared to nonallergic individuals. The titer of allergen-specific IgE showed significant correlation with allergen-specific Th cells and not with allergen-specific B cells for all 3 allergens. Conclusions A high number of allergen-specific proliferating Th cells, but not proliferating B cells, may play a role in the pathogenesis of allergic asthma/rhinitis/eczema.
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Affiliation(s)
- Aito Ueno-Yamanouchi
- Department of Medicine, University of Calgary, Health Science Center, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada
| | - Faisal M Khan
- Department of Pathology & Laboratory Medicine, University of Calgary, Room 269, Heritage Medical Research Building, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada.,Department of Paediatrics, University of Calgary, Room 269, Heritage Medical Research Building, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada
| | - Bazir Serushago
- Department of Medicine, University of Calgary, Health Science Center, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada
| | - Tom Bowen
- Department of Medicine, University of Calgary, Health Science Center, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada.,Department of Paediatrics, University of Calgary, Room 269, Heritage Medical Research Building, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada
| | - Cathy Lu
- Department of Medicine, University of Calgary, Health Science Center, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada
| | - Joanne Luider
- Department of Pathology & Laboratory Medicine, University of Calgary, Room 269, Heritage Medical Research Building, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada
| | - Jan Storek
- Department of Medicine, University of Calgary, Health Science Center, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada
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Chedid MG, Deulofeut H, Yunis DE, Lara-Marquez ML, Salazar M, Deulofeut R, Awdeh Z, Alper CA, Yunis EJ. Defect in Th1-like cells of nonresponders to hepatitis B vaccine. Hum Immunol 1997; 58:42-51. [PMID: 9438208 DOI: 10.1016/s0198-8859(97)00209-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Peripheral blood lymphocytes from nonresponders to hepatitis B vaccine (HBsAg) failed to undergo a proliferative response to recombinant HBsAg in vitro, whereas cells from responders proliferated vigorously. The lack of proliferative response was not due to defective antigen presentation in that MHC-identical responder and nonresponder antigen presenting cells were equally effective in stimulating responder T cells. Nonresponder T cells did not proliferate in response to antigen-pulsed MHC identical responder antigen presenting cells. The present study demonstrated that: 1) there were no detectable (1 in < 20 x 10(4) HBsAg-precursor T cells in any of the nonresponders, while in responders the frequency of HBsAg-precursor T cells ranged from 1 in 3.2 x 10(3) to 1 in 40 x 10(3); 2) nonresponder cell cultures did not secrete IL-2 in response to HBsAg stimulation; 3) exogenous recombinant IL-2 did not restore the proliferative response of the T cells in HBsAg-pulsed cultures of nonresponders. These results suggest that the cellular basis for the lack of response to HBsAg is a defect in HBsAg-specific Th1-like cells; either there is an absence of the Th1 cells or cells with TCR specificity for HBsAg are present but are unresponsive to the HBsAg peptide-MHC complex (i.e., anergy or tolerance).
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Affiliation(s)
- M G Chedid
- Division of Immunogenetics, Dana-Farber Cancer Institute, Boston, MA 02115, USA
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