Chem. J. Chinese Universities ›› 2015, Vol. 36 ›› Issue (1): 131.doi: 10.7503/cjcu20140740

• Physical Chemistry • Previous Articles     Next Articles

Insight into the Formation Mechanisms Behind Self-emulsifying Drug Delivery Systems of Calcium Channel Blockers

HE Rui1, WANG Xiaona1, WANG Xinyue1, QIU Ya1, YANG Shengyong2, YIN Zongning1,*()   

  1. 1. Key Laboratory of Drug Targeting and Novel Drug Delivery Systems, West China School of Pharmacy,2. State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
  • Received:2014-08-13 Revised:2014-12-09 Online:2015-01-10 Published:2014-12-09
  • Contact: YIN Zongning E-mail:yzn@scu.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.81373338)

Abstract:

Several self-emulsifying drug delivery systems(SEDDS) were constructed, using a series of poorly water-soluble dihydropyridines of calcium channel blockers(DHPs-CCBs) as the model drugs, and characte-rized them with regards to self-emulsification area and solubility of the payloads. By establishing multiple linear regression(MLR) models between the molecular descriptors of building components and characteristics of the emulsions formed eventually, we then tried to reveal the formation mechanisms under self-emulsification process. It was found that emulsification process was primarily initialized by the intermolecular forces but simultaneously affected by the proportion of components, lipophilicity and molecular size. Larger molecular size of the mixed surfactants and better lipophilicity of drug contributed to higher drug solubility. Also, the stability of SEDDS after dilution correlated positively with the mass ratio of surfactants and co-surfactants and the molecular size of mixed surfactants. It is supposed that this work could generally be used as guidelines to screen the formulas of SEDDS.

Key words: Calcium channel blocker, Self-emulsification area, Solubility, Multiple liner regression, Self-emulsification mechanism, Self-emulsifying drug delivery system(SEDDS)

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