IGHE and allergic asthma: Here we adoptively transfer ovalbumin (OVA) peptide-primed CD4−CD8− double negative T (DNT) cells intravenously into a mouse model of OVA-induced allergic asthma to find that OVA-induced airway hyperresponsiveness, lung inflammation, mucus production and OVA-specific IgG/IgE production are significantly suppressed.