1.Separation of total flavone in Sarcandra glabra by macroporous adsorption resins
Guoliang XU ; Binhua XIAO ; Hubin ZOU ; Qi CHEN
Chinese Traditional and Herbal Drugs 1994;0(07):-
Objective To set up the technology for adsorbing and separating total flavone in Sarcandra glabra with macroporous adsorption resin,11 types of macroporous adsorption resins were investigated.Methods The static adsorption and separation were used in investigation of macroporous adsorption resin;the dynamic adsorption and separation were used in studying the condition of adsorption and separation.The total flavone adsorption capacity,total flavone content,and total flavone recovery rate were used as the evaluation criteria.The UV spectrophotometric method was used in the determination of total flavone content.Results The results showed that among 11 types of macroporous adsorption resins,the HPD400 was the best for adsorbing and separating the total flavone in S.glabra in the following technological condition: the concentration of S.glabra sample extract was 10 mg/mL;the maximum adsorbing capacity for total flavone in S.glabra was 9.5 mg/mL;the current velocity was 2.5 mL/min;the eluting reagent was 70% ethanol(three times as the volume of the resin);and the HPD400 resin could be used three times,repeatedly.Conclusion It is a simple and efficient to separate the total flavone in S.glabra under the technological conditions,and a total flavone recovery rate is about 85%.
2.Synergetic delivery of triptolide and Ce6 with light-activatable liposomes for efficient hepatocellular carcinoma therapy.
Ling YU ; Zhenjie WANG ; Zhuomao MO ; Binhua ZOU ; Yuanyuan YANG ; Rui SUN ; Wen MA ; Meng YU ; Shijun ZHANG ; Zhiqiang YU
Acta Pharmaceutica Sinica B 2021;11(7):2004-2015
Hepatocellular carcinoma (HCC) has been known as the second common leading cancer worldwide, as it responds poorly to both chemotherapy and medication. Triptolide (TP), a diterpenoid triepoxide, is a promising treatment agent for its effective anticancer effect on multiple cancers including HCC. However, its clinical application has been limited owing to its severe systemic toxicities, low solubility, and fast elimination in the body. Therefore, to overcome the above obstacles, photo-activatable liposomes (LP) integrated with both photosensitizer Ce6 and chemotherapeutic drug TP (TP/Ce6-LP) was designed in the pursuit of controlled drug release and synergetic photodynamic therapy in HCC therapy. The TP encapsulated in liposomes accumulated to the tumor site due to the enhanced permeability and retention (EPR) effect. Under laser irradiation, the photosensitizer Ce6 generated reactive oxygen species (ROS) and further oxidized the unsaturated phospholipids. In this way, the liposomes were destroyed to release TP. TP/Ce6-LP with NIR laser irradiation (TP/Ce6-LP+L) showed the best anti-tumor effect both