Overexpression of LAT inhibits Th2 cytokine production and promoted Th1 cytokine production in human peripheral blood T cells in both asthmatic patients and healthy controls. Purified peripheral blood T cells from allergic asthmatic patients and healthy controls were nucleofected with pCMV-myc-LAT, pCMV-myc, LAT-siRNA plasmids separately. A) LAT expression was analyzed by western blot. B) Nucleofected T cells were activated with anti-CD3 and anti-CD28 for 24 h. Cytokine production of IL-4 and IFN-γ was measured by ELISA. Data is shown as mean ± SD, n = 10 (*p < 0.05).