Unbound MEDLINE

Galactose-α-1,3-galactose-specific IgE is associated with anaphylaxis but not asthma.

Abstract

RATIONALE
IgE antibodies to the mammalian oligosaccharide galactose-α-1,3-galactose (α-gal) are common in the southeastern United States. These antibodies, which are induced by ectoparasitic ticks, can give rise to positive skin tests or serum assays with cat extract.
OBJECTIVES
To evaluate the relationship between IgE antibodies to α-gal and asthma, and compare this with the relationship between asthma and IgE antibodies to Fel d 1 and other protein allergens.
METHODS
Patients being investigated for recurrent anaphylaxis, angioedema, or acute urticaria underwent spirometry, exhaled nitric oxide, questionnaires, and serum IgE antibody assays. The results were compared with control subjects and cohorts from the emergency department in Virginia (n = 130), northern Sweden (n = 963), and rural Kenya (n = 131).
MEASUREMENTS AND MAIN RESULTS
Patients in Virginia with high-titer IgE antibodies to α-gal had normal lung function, low levels of exhaled nitric oxide, and low prevalence of asthma symptoms. Among patients in the emergency department and children in Kenya, there was no association between IgE antibodies to α-gal and asthma (odds ratios, 1.04 and 0.75, respectively). In Sweden, IgE antibodies to cat were closely correlated with IgE antibodies to Fel d 1 (r = 0.83) and to asthma (P < 0.001).
CONCLUSIONS
These results provide a model of an ectoparasite-induced specific IgE response that can increase total serum IgE without creating a risk for asthma, and further evidence that the main allergens that are causally related to asthma are those that are inhaled.

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  • Authors

    Commins SP, Kelly LA, Rönmark E, James HR, Pochan SL, Peters EJ, Lundbäck B, Nganga LW, Cooper PJ, Hoskins JM, Eapen SS, Matos LA, McBride DC, Heymann PW, Woodfolk JA, Perzanowski MS, Platts-Mills TA

    Source

    American journal of respiratory and critical care medicine 185:7 2012 Apr 1 pg 723-30

    MeSH

    Adolescent
    Adult
    Aged
    Aged, 80 and over
    Anaphylaxis
    Animals
    Asthma
    Case-Control Studies
    Child
    Disaccharides
    Emergency Service, Hospital
    Female
    Humans
    Immunoglobulin E
    Male
    Middle Aged
    Nitric Oxide
    Norway
    Risk Factors
    Spirometry
    Sweden
    Ticks
    Virginia
    Young Adult

    Pub Type(s)

    Journal Article
    Research Support, N.I.H., Extramural
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    22281828