IL4 and asthma: rTS‐SUCLA‐β was administered at varying dosages to mice with asthma induced by OVA, and it was showed that IFN‐γ in BALF of 50 μg rTS‐SUCLA‐β + OVA group was decreased, while IL‐4 level in the groups treated with rTS‐SUCLA‐β had no significant change compared with OVA group.