This suggested that membraous milkvetch root prob-ablyreduced the secretion of IL4 by regulating the shift of Th1 and Th2,acordingly IgE synthesized by B cells decreased. So membranous milkvetgh root could prevent from type I hypersensitivity.

• 结论黄花可甬通过调整了Th1和Th2的偏移,使IL-4分泌减少,B细胞合成的IgE也随之明显降低,从而阻止了I型超敏反应的发生。