IL4 and asthma: Accordingly, agents targeting the molecular participants in the Th2-high subtype (e.g., anti-IL-4, anti-IL-5, anti-IL-13, IgE blockers, and inhibitors of prostaglandin D2 (CRTH2) receptor) have recently been presented as potential drugs to treat asthma.11 Some of these targets are shown in Table 1.