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Study on preparation of Venenum Bufonis Chitosan Microspheres and sustained release characteristics in vitro |
LIU Li1 LI Zongyun2 HE Shixue2 ZHAO Yue2 ZHANG Chunbao2 |
1.Department of Pharmacy, Hengshui People’s Hospital, Hebei Province, Hengshui 053000, China;
2.Department of Clinical Pharmacy, Hengshui People’s Hospital, Hebei Province, Hengshui 053000, China |
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Abstract Objective To prepare the Venenum Bufonis Chitosan Microspheres with deacetylated chitosan as a carrier and study the characteristics of Venenum Bufonis Chitosan Microspheres sustained release in vitro. Methods The Venenum Bufonis Chitosan Microspheres were prepared by emulsification-crosslinking method and their components were identified by thin layer chromatography. High performance liquid chromatography was used to detect the content of cinobufagin and resibufogenin and to detect the encapsulated efficiency of microspheres (the amount of drug encapsulated in the system divided by total dose of encapsulated and unencapsulated). The ultraviolet spectrophotometer was used to detect the indole alkaloids. Results The prepared microspheres had smooth surface and an average particle size of 9.20 μm. The three batches of microspheres showed fluorescence spots corresponding to the control substance and were negative without interference. The total drug loading of cinobufagin and resibufogenin, encapsulation rate and indole alkaloids content of microspheres were 6.06%, 73.30% and 6.59% respectively. Conclusion The prepared Venenum Bufonis Chitosan Microspheres have a good sustained release effect.
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