In this study,seven alkaloids were detected in Wu-tou decoction using ultra performance liquid chromatography coupled with tandem mass spectrometry(UPLC-MS").The aim of this study was to investigate the effect of Fritillariae Cirrhosae Bulbus,Fritillariae Thunbergii Bulbils,Pinelliae Rhizoma in different ratios with Wu-tou decoction(2:1,1:1,1:2) by measuring the therapeutic effects in Wu-tou decoction of main seven alkaloids including benzoylaconitine(BA),benzoylmesaconitine(BM),benzoylhypaconitine(BH),hypaconitine(HA),fuziline(FU),niaolin(NE) and deoxyaconitine(DA).The permeability of aconitum alkaloids extract through a Caco-2 cell monolayer was analyzed in the absence and presence of Fritillariae Cirrhosae Bulbus,Fritillariae Thunbergii Bulbus,and Pinelliae Rhizoma,respectively.The results showed that Pinelliae Rhizoma could reduce the absorption of the alkaloids and increase the excretion of the alkaloids,which would attenuate the therapeutic effects of Wu-tou decoction.Therefore.Pinelliae Rhizoma is an incompatible herb of Wu-tou decoction because of the inhibition of the absorption of alkaloids in the intestine.And that Fritillariae Cirrhosae Bulbus and Fritillariae Thunbergii Bulbus showed the effects to improve the permeability of the alkaloids in Wu-tou decoction.These effects of these two herbs were similar,but the former was stronger than the latter,which most likely is clue to the fact that the compositions of these two traditional Chinese medicines are similar.The in vitro data suggests that the compounds such as fritillary presented in alkaloids in the formula maybe improve the therapeutic function caused by the increased bioavailability of alkaloids in intestine.
Hong KanWen-Yue JiangRu DingZhong-Ying LiuZi-Feng PiZhi-Qiang Liu
