In Vitro Induction of Allergen-Specific Interleukin-10-Producing Regulatory B Cell Responses by Interferon-gamma in Non-Immunoglobulin E-Mediated Milk Allergy
Allergy, Asthma & Immunology Research
;
: 48-54, 2013.
Article
in English
| WPRIM
| ID: wpr-48733
ABSTRACT
PURPOSE:
Specific oral immunotherapy (SOIT) using interferon-gamma (IFN-gamma) has been successful as a food allergy treatment. Interleukin-10 (IL-10)-producing regulatory B cells (Br1s) play a role in immune tolerance to food allergens. In addition, IFN-gamma shows tolerogenic effects on allergen-induced Br1 responses.METHODS:
Eleven patients that were allergic to cow's milk and 12 milk-tolerant subjects were selected by double-blind placebo-controlled food challenge (DBPCFC) and clinical characteristics. The immunomodulatory effects of IFN-gamma on allergen-specific Br1 responses were evaluated in 6 milk allergy patients and 8 milk-tolerant subjects. Peripheral blood mononuclear cells (PBMCs) from subjects were stimulated with casein and/or IFN-gamma and analyzed by flow cytometry.RESULTS:
IFN-gamma had no effect on total cell counts or the proportion of Br1 cells in PBMCs. IFN-gamma stimulation did not change total Br1 cell counts or the percentage of Br1s among CD5(+) B cells in the milk allergy or the milk-tolerant groups. In the milk allergy group, Br1 counts were not different between the control and the casein stimulation but significantly increased in the IFN-gamma + casein stimulated cells, and the Br1 fractions were decreased after casein stimulation and recovered in the addition of IFN-gamma for stimulation. In the milk-tolerant group, Br1 counts increased in the casein stimulated cells and in the IFN-gamma + casein stimulated cells, but the increase was significantly less when IFN-gamma was added, and the Br1 fractions were increased after casein stimulation and IFN-gamma + casein stimulation, that was not significant when IFN-gamma was added.CONCLUSIONS:
IFN-gamma-induced allergen-specific Br1 responses in the PBMCs of milk allergy patients play a role in milk allergen-specific tolerance induction in vitro. Further investigations into the molecular immunological mechanisms underlying the induction of allergen-specific Br1 responses are needed.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Allergens
/
B-Lymphocytes
/
Caseins
/
Cell Count
/
Milk Hypersensitivity
/
Interferon-gamma
/
Interleukin-10
/
Milk
/
Dermatitis, Atopic
/
B-Lymphocytes, Regulatory
Type of study:
Controlled clinical trial
Limits:
Humans
Language:
English
Journal:
Allergy, Asthma & Immunology Research
Year:
2013
Type:
Article
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