Wu C1, Wang N2, Xu P2, Wang X2, Shou D2, Zhu Y1.
J Sep Sci. 2020 Mar 5. doi: 10.1002/jssc.201901203. [Epub ahead of print]
Cell membrane chromatography is a powerful tool for screening active components form complex matrices. New cell membrane carriers need to be developed to increase the coverage of cell membranes on the surface of stationary phases, thereby improving cell membrane chromatographic retention. In this work, we prepared polyvinyl alcohol-poly dimethyl diallyl ammonium chloride modified silica gel as a cell membrane carrier. Osteoblast cell was used as cell membrane source, which was widely used to evaluate the osteogenic activity of drugs. The new cell membrane chromatographic stationary phase was used to screen anti-osteoporosis components in Liuwei Dihuang Decoction-containing serum. The chemical structures of the new modified materials were characterized by scanning electronic microscopy, fourier transform infrared spectroscopy and elemental analysis characterization. Compared with the common cell membrane column, the cell membrane coverage of this modified material was increased by 30%, and thus provided a stronger retention effect in positive drugs. 19 metabolites in rat serum samples were retained on the cell membrane chromatography and identified by ultra-high-performance liquid chromatography/time-of-flight mass spectrometry. Among those, four components (morroniside, catalpol, loganin and acteoside) were selected for in vitro pharmacodynamics validation. They significantly increased the osteoblast proliferation. The new modified material was successfully applied to screen anti-osteoporosis components from Liuwei Dihuang Decoction-containing serum.