TH1-promoting DNA immunization against allergens modulates the ratio of IgG1/IgG2a but does not affect the anaphylactic potential of IgG1 antibodies

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Presentation transcript:

TH1-promoting DNA immunization against allergens modulates the ratio of IgG1/IgG2a but does not affect the anaphylactic potential of IgG1 antibodies Romana Hochreiter, PhD, Fatima Ferreira, PhD, Josef Thalhamer, PhD, Peter Hammerl, PhD Journal of Allergy and Clinical Immunology Volume 112, Issue 3, Pages 579-584 (September 2003) DOI: 10.1016/S0091-6749(03)01623-3

FIG 1 ELISA for IgG isotypes elicited against Bet v 1a (A, B) and Api g1 (C, D) after protein immunization with alum (A, C) or DNA immunization (B, D). Antibody concentrations, as listed in Table I, were calculated from the serum dilution that gave a signal of 106 photon counts/second (dotted line). Data are shown as mean ± SEM of groups of 4 mice, each. A and C, Significance between IgG1 and IgG2a signals: P = .029 at all dilutions, as calculated by Mann-Whitney rank sum test. Journal of Allergy and Clinical Immunology 2003 112, 579-584DOI: (10.1016/S0091-6749(03)01623-3)

FIG 2 IgE-mediated allergen-specific degranulation of rat basophil leukemia-2H3 cells sensitized with the indicated sera at the indicated dilutions. Release without sensitization was 3%; sera of naive mice gave a specific release of less than 5% at a dilution of 1:10 (not shown). Results are reported as mean ± SEM of 4 mice. Significance was tested by Mann-Whitney rank sum test. Journal of Allergy and Clinical Immunology 2003 112, 579-584DOI: (10.1016/S0091-6749(03)01623-3)

FIG 3 IL-4R−/− or wild-type BALB/c mice (n = 4 in each group) were immunized with rBet v 1a and CFA. A, Bet v 1a–specific serum antibody isotypes (ELISA). B, IgE-mediated antigen-specific degranulation of rat basophil leukemia-2H3 cells sensitized with serial serum dilutions as indicated. Significance was tested by Student t test. C, Right, heat-resistant passive cutaneous anaphylaxis, induced with serial log2 dilutions (starting with 1:10) of pooled sera from each group; left, positioning scheme and dilution factors of applied serum pools. Journal of Allergy and Clinical Immunology 2003 112, 579-584DOI: (10.1016/S0091-6749(03)01623-3)