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  • Title: Immunoglobulin (Ig) and IgG subclasses in Asian children with bronchial asthma.
    Author: Chan G, Seah CC, Yap HK, Goh DY, Lee BW.
    Journal: Ann Trop Paediatr; 1995 Dec; 15(4):280-4. PubMed ID: 8687202.
    Abstract:
    Selective immunoglobulin deficiencies have been shown to be associated with atopic disease. In this study, serum immunoglobulin (Ig) G, A, M, E and IgG subclasses of 92 Asian asthmatic children were studied and compared with those of age-matched controls. The children, aged between 0.7 and 17.4 years (mean age 7.5 years), were recruited from the National University Hospital, Singapore. The serum Ig levels were measured by enzyme-linked immunosorbent assay, except for IgE which was measured by the fluorescent allergosorbent test. As expected, serum total IgE levels were markedly higher in the asthmatic children than in the controls (geometric mean = 513 units/ml and 164 units/ml, respectively; p < 0.0001). Serum IgM levels were also slightly higher in the asthmatic patients than in the controls (geometric mean = 1.74 and 1.51 milligrams, respectively; p < 0.04). Mean serum IgG and A and IgG subclasses (1-4) levels in the asthmatics did not differ significantly from those in the controls. However, four asthmatic children were found to have selective IgA deficiency (serum IgA < 0.08 milligrams). None of the patients was found to be IgG subclass-deficient.
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