Establishment and evaluation of O/W type-based microemulsion on crossbow medicine of the Miao ethnic group

Background:Crossbow medicine needle is a traditional external therapy.However,acupuncture pain,inaccurate administration,secondary infection,and poor patient compliance limit the application of specialty therapies.Since the most effective components of crossbow medicine are lipid-soluble,the crossbow medicine needle was prepared as an innovative O/W-type microemulsion to solve these problems.In this study,the crossbow medicine microemulsion preparation method was established and its quality was evaluated.Methods:A single factor and pseudoternary phase diagram,combined with a D-optimal mixture design,optimized the formulation of crossbow medicine microemulsion through particle size,polydispersity index,zeta potential,microstructure,and contents of benzoyl neoaconitine,benzoyl hypoaconitine,neoaconitine,periplocin,and methyl salicylate to evaluate the final prescription.Results:The best prescription for preparing crossbow medicine microemulsion is 0.1500 g crossbow medicine dry extract,0.1500 g isopropyl myristate,0.8625 g polyoxyethylene castor oil-35,0.2875 g ethanol,3.700 g water,and 5.1500 g microemulsion.The prepared microemulsion is an oil-in-water type with a clear and transparent appearance.Its average particle size is 19.83±0.78 nm,average polydispersity index is 0.15±0.02,and average zeta potential is−0.51±0.1 mV.The pH value is 5.17±0.02.The microstructure of crossbow medicine microemulsion illustrated a uniform distribution of spherical oil globules.The average contents of benzoyl neoaconitine,benzoyl hypoaconitine,neoaconitine,periplocin,and methyl salicylate were 13.34,113.05,43.45,628.27 and 27.93μg/g,respectively.Conclusion:The preparation process of crossbow medicine microemulsion is reasonable and feasible.The method to determine the content is accurate and straightforward,laying the foundation for further research.

In vitro evaluation of transdermal permeation effects of Fu’s cupping therapy via six diffusion kinetics models

本研究建立吲哚美辛亲水凝胶贴剂的体外经皮渗透的6种动力学模型:零级、一级、Higuchi级、Ritger-Peppas级、Weibull级与Hixcon-Crowell级动力方程Q1/3=kt+b,评价付罐疗法(FCT)体外经皮促渗作用与特点。3%氮酮和5%氮酮化学促渗剂与离子导入为参比,用HPLC-工作曲线对吲哚美辛(IM)定量,进行体外透皮扩散,结果进行回归建模。结果表明:FCT促渗处理组能明显提高吲哚美辛的透皮效果,改善体外透皮的Higuchi级与Weibull级动力学参数,提高透皮速率与渗透系数,减低时滞。FCT作为新的物理经皮给药促渗新技术,效果明显,具有中医特色和重要的临床应用价值。