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马钱子优化总生物碱复合磷脂传递体的制备与性质研究

马钱子优化总生物碱复合磷脂传递体的制备与性质研究
马钱子优化总生物碱复合磷脂传递体的制备与性质研究

马钱子优化总生物碱复合磷脂传递体的

制备与性质研究

李俊1陈军2蔡宝昌2严道南3△

摘要:目的应用复合磷脂传递体技术以改善马钱子优化总生物碱的药剂学性质和透皮吸收效果。方法通过除去总生物碱中的大部分士的宁得到马钱子优化总生物碱。采用硫酸铵梯度法制备了马钱子优化总生物碱复合磷脂传递体,以包封率为指标确定了其最优磷脂组成。以相应的单一磷脂传递体为对照,比较了马钱子总生物碱复合磷脂传递体药剂学性质以及体外透皮吸收性

质。采用DSC 和分子模拟研究考察了复合磷脂的相互作用规律。结果优化后,

马钱子总生物碱中马钱子碱与士的宁的比值从1?1.8改变为2.7?1,LD 50比优化前提高了4.8倍。通过包封率考察确定SPC?DPPC =4?6为最佳复合磷脂组成。与单一磷脂传递体相比,马钱子优化总生物碱复合磷脂传递体的药剂学性质和体外透皮吸收效果显著提高。结论马钱子优化总生物碱复合磷脂传递体的药剂学性质与透皮吸收性能优于单一磷脂传递体。

关键词:马钱子;总生物碱;马钱子碱;传递体;透皮吸收;大豆磷脂(SPC );二棕榈酰磷脂酰胆碱(DPPC )

doi :10.3969/j.issn.1003-8914.2013.01.022文章编号:1003-

8914(2013)-01-0043-05The preparation and properties study of modified total alkaloids (MTA )from the seeds

of Strychnou nux-vomica L

Li Jun 1Chen Jun 2Cai Baochang 2Yan Daonan 3

(1.Nanjing University of Chinese Medicine ,Jiangsu ,Nanjing ;

2.Department of Ophthalmology and Otolaryngoloy of Chinese Medicine ,Nanjing University of Chinese Medicine ,Jiangsu ,Nanjing )Abstract :Objective To improve the pharmaceutical properties and transdermal absorption ability of modified total alkaloids (MTA )from

the seeds of Strychnou nux-vomica L .by transfersome technique.Methods

To obtain the MTA ,the content of strychnine was significantly reduced in the composition of total alkaloids.The novel transfersomes containing MTA was prepared by the ammonium sulfate gradient loading method.The optimal molar ratio of DPPC and SPC was determined by the evaluation of the encapsulation efficiency (EE ).The pharmaceutical properties and transderml absorption abilities of transfersomes with different lipid composition were compared.The mechanism accounted for the relationship between SPC and DPPC was further investigated by DSC and molecular modeling.Results The mass ratio of brucine to strychnine in the MTA was increased from 1?1.8to 2.7?1.The LD 50value of MTA was increased about 4.8-fold compared with that of total alkaloids.The optimal molar ratio of DPPC and SPC was found to be 6?4.Compared with the corresponding DPPC or SPC transfersomes ,the pharmaceutical properties and transderml absorption ability were significantly improved by the application of the novel transfersomes composed of both SPC and DPPC.Conclusions Compared with transfersomes composed of SPC or DPPC ,novel transfersomes composed of both SPC and DPPC have been proved to be better carriers for the transdermal absorption of MTA.

Key words :Strychnou nux-vomica L.;total alkaloids ;brucine ;transfersomes ;transdermal absorption ;SPC ;DPPC

作者单位:1.南京中医药大学(南京210046);2.南京中医药大学药

学院(南京210046);3.南京中医药大学中医五官科教研

室(南京210046)

△通讯作者传统大毒中药马钱子,又名番木鳖,始载于《本草

纲目·卷十八》,是马钱科植物马钱(Strychnou nux-

vomica L.)的干燥成熟种子,具有通络止痛、散结消肿

之功效,

因此,在中医药临床上得到广泛应用。总生物碱是马钱子的主要有效部位,目前的研究表明马钱子

总生物碱中至少有16种生物碱成分[1],主要成分是士的宁和马钱子碱,两者的含量约占总生物碱的一半。其中,士的宁的毒性是马钱子碱的45 71倍[2-3],且药效学研究表明其在消肿止痛方面几乎没有活性[4],因此,本文利用士的宁和马钱子碱在50%乙醇中溶解度相差悬殊的原理除去马钱子总生物碱中大部分士的宁,从而得到马钱子优化总生物碱,相关技术已经申请

了专利[5]。

经皮给药是传统中药制剂除口服以外的主要给药途径,但是,皮肤同时也是人体最主要的屏障,马钱子生物碱类成分通过皮肤吸收的生物利用度有限,直接影响了其经皮给药后药效的发挥。传递体·

34·光明中医2013年1月第28卷第1期CJGMCM January 2013.Vol 28.1

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