Fig. 6From: Detection of IL-9 producing T cells in the PBMCs of allergic asthmatic patientsIL-9 synergistically promotes IL-4-induced IgE and IgG production. a The production of IgG, but not IgE, can be promoted by IL-9 alone (n = 3). b Synergistic effect of IL-9 on IL-4–induced IgE and IgG production (n = 4). IgE and IgG levels were detected by ELISA. Results represent the Mean ± SEM. ND, not detected; **, P < 0.01; ***, P < 0.001Back to article page