Document Detail

Mechanisms of immunotherapy: IgG revisited.
MedLine Citation:
PMID:  15238798     Owner:  NLM     Status:  MEDLINE    
PURPOSE OF REVIEW: This paper will review historical and recent evidence for the induction of 'blocking' IgG antibodies during successful specific immunotherapy. RECENT FINDINGS: Specific immunotherapy is frequently associated with a rise in allergen-specific IgG4 antibodies and a modest reduction in specific IgE titres, although this does not always correlate with clinical efficacy. There is accumulating evidence that specific immunotherapy also influences the blocking activity on IgE-mediated responses by IgG4, and cellular assays are commonly used to investigate these changes. Recently, a novel assay, which detects allergen-IgE binding using flow cytometry, has been used to detect 'functional' specific immunotherapy-induced changes in IgG antibody activity. Results suggest that successful specific immunotherapy is associated with an increase in IgG blocking activity that is not solely dependent on the quantity of IgG antibodies. SUMMARY: Successful immunotherapy is associated with quantitative and qualitative changes in the allergen-specific IgG antibody response. The induction of IgG antibodies with blocking activity may have a protective role not only through the inhibition of allergen-induced, IgE-mediated release of inflammatory mediators from mast cells and basophils, but also through the inhibition of IgE-facilitated antigen presentation to T cells. Qualitative changes in the allergen-specific IgG antibody response may possibly be an important mechanism underlying the clinical efficacy of specific immunotherapy. Monitoring changes in blocking activity using cellular assays may give an early indication of the potential success of treatment.
Petra A Wachholz; Stephen R Durham
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Current opinion in allergy and clinical immunology     Volume:  4     ISSN:  1528-4050     ISO Abbreviation:  Curr Opin Allergy Clin Immunol     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-07-07     Completed Date:  2004-11-10     Revised Date:  2005-11-16    
Medline Journal Info:
Nlm Unique ID:  100936359     Medline TA:  Curr Opin Allergy Clin Immunol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  313-8     Citation Subset:  IM    
Immunology, HAES Research, Syngenta, CTL, Macclesfield, Cheshire, UK.
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MeSH Terms
Hypersensitivity / therapy*
Immunoglobulin G / blood,  immunology*
Immunotherapy / methods*
Reg. No./Substance:
0/Immunoglobulin G

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