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Background  Extensive bioactivities of alkaloids from the genus  Macleaya  ( Macleaya cordata  (Willd.) R. Br. and  Macleaya microcarpa  (Maxim.) Fedde) have been widely reported, as well as more and more concerned from the scientific communities. However, systematic research on the phytochemical information of  M. microcarpa  is incomplete. The aim of this study was to rapidly and conveniently qualitative analyze alkaloids from  M. microcarpa  by ultra-performance liquid chromatography/quadrupole-time-of-fight mass spectrometry (UHPLC–Q-TOF-MS) using accurate mass weight and characteristic fragment ions, furthermore separate and identify the main alkaloids, test antitumor activity in vitro and antiangiogenic activity in vivo.    Results  A total of 14 alkaloids from fruits of  M. microcarpa  were identified by UHPLC–Q-TOF-MS, including 5 protopines, 2 benzophenanthridines, 1 dimer, 1 dihydrobenzophenanthridines and 5 unknown structure compounds. Two major alkaloids were isolated by various column chromatographic methods. Their structures were determined by NMR data and related literatures. The two major alkaloids were evaluated for intro cytotoxic activities against HL-60, MCF-7, A-549, and in vivo antiangiogenic activity using transgenic zebrafish.    Conclusions  Current qualitative method based on UHPLC–Q-TOF-MS technique provided a scientific basis for isolation, structural identification, and in vitro or in vivo pharmacological further study of alkaloids from  M. microcarpa  in the future.

bmc chemistry

Isolation and identification of alkaloids from Macleaya microcarpa by UHPLC–Q-TOF-MS and their cytotoxic activity in vitro, antiangiogenic activity in vivo