Abstract:
BACKGROUND:Clinically it is recognized that tree nut allergies such as hazelnut allergy are not usually outgrown. Specific mechanisms underlying the persistence of such food allergies are incompletely understood. Here we studied the natural history and the long-term immune and clinical characteristics of hazelnut allergy in an adjuvant-free mouse model. METHODS:BALB/c mice were sensitized to hazelnut protein using a transdermal sensitization protocol that does not use adjuvant. After establishing sensitization, exposure to hazelnut was withdrawn for 3, 5 or 8 months. The fate of circulating IgE antibodies was monitored. Subsequently, mice were given booster exposures and examined for memory IgE antibody and spleen cell IL-4 responses. Clinical characteristics and hypothermia responses upon oral allergen challenge were studied. RESULTS:Upon allergen withdrawal, circulating hazelnut-specific IgE antibody levels began to drop. Nevertheless, IgE responses once established remained at significantly high levels for up to 8 months (the last time point studied) despite withdrawal of allergen exposure. Memory IgE responses to booster exposures were robust after 3, 5 or 8 months of allergen withdrawal. Furthermore, significant clinical reactivity to oral hazelnut challenge, and hypothermia responses were demonstrable at each of these time points. Long-lasting spleen cell memory IL-4 responses to hazelnut were detectable in these mice explaining the mechanism of sustenance of IgE responses and clinical sensitization. CONCLUSIONS:Hazelnut allergy once established persists for long periods, despite withdrawal of allergen exposure, due to long-lasting, memory IgE and IL-4 responses.
journal_name
Int Arch Allergy Immunoljournal_title
International archives of allergy and immunologyauthors
Gonipeta B,Parvataneni S,Paruchuri P,Gangur Vdoi
10.1159/000283028subject
Has Abstractpub_date
2010-01-01 00:00:00pages
219-25issue
3eissn
1018-2438issn
1423-0097pii
000283028journal_volume
152pub_type
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journal_title:International archives of allergy and immunology
pub_type: 杂志文章
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abstract:BACKGROUND:Cry j 1 and Cry j 2 are thought to be the major allergens of Japanese cedar pollen. HLA class II types capable of presenting T-cell epitopes in both allergens and their role in induction of T-cell subsets are not well known. METHODS:CD4+ T (Th)-cell clones (TCCs) specific to either Cry j 1 or Cry j 2 were g...
journal_title:International archives of allergy and immunology
pub_type: 杂志文章
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journal_title:International archives of allergy and immunology
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journal_title:International archives of allergy and immunology
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doi:10.1159/000053829
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journal_title:International archives of allergy and immunology
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journal_title:International archives of allergy and immunology
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journal_title:International archives of allergy and immunology
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journal_title:International archives of allergy and immunology
pub_type: 杂志文章
doi:10.1159/000236479
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journal_title:International archives of allergy and immunology
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journal_title:International archives of allergy and immunology
pub_type: 杂志文章
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journal_title:International archives of allergy and immunology
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journal_title:International archives of allergy and immunology
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journal_title:International archives of allergy and immunology
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pub_type: 杂志文章
doi:10.1159/000236636
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journal_title:International archives of allergy and immunology
pub_type: 杂志文章
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journal_title:International archives of allergy and immunology
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journal_title:International archives of allergy and immunology
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journal_title:International archives of allergy and immunology
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更新日期:2011-01-01 00:00:00
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journal_title:International archives of allergy and immunology
pub_type: 杂志文章,评审
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更新日期:2013-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1159/000144038
更新日期:2008-01-01 00:00:00
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journal_title:International archives of allergy and immunology
pub_type: 杂志文章
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更新日期:1996-07-01 00:00:00
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journal_title:International archives of allergy and immunology
pub_type: 杂志文章
doi:10.1159/000090384
更新日期:2006-01-01 00:00:00
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journal_title:International archives of allergy and immunology
pub_type: 杂志文章
doi:10.1159/000089516
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journal_title:International archives of allergy and immunology
pub_type: 杂志文章
doi:10.1159/000237695
更新日期:1997-12-01 00:00:00
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journal_title:International archives of allergy and immunology
pub_type: 杂志文章
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更新日期:1995-11-01 00:00:00