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脑清乳剂的研制及其性质研究
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摘要
脑清乳剂是为治疗缺血性中风而研制的药物,其主要成分为中药麝香、冰片、三七、川芎、石菖蒲等,存在成分复杂,结构多样性的特点。本课题将脂肪乳剂与鼻腔给药结合起来,使乳剂中的药物与鼻粘膜紧密和持续地接触,以提高生物利用度,增加患者用药依从性,特别是利用喷鼻剂具有的剂型特点,加强药物针对脑部的靶向作用,适用于缺血性脑血管机能不全急性期的应急处理。国内尚未见报道使用乳剂作为中药喷鼻给药的剂型。
     本论文以药材有效成分含量为指标,通过单因素考察和正交试验优化了麝香、石菖蒲及薄荷的提取工艺。验证试验表明,工艺提取率高,重现性较好。本文研究了冰片的羟丙基-β-环糊精(HP-β-CD)包合物的制备工艺,以包合率和包合物收率为指标评价包合工艺,通过正交设计试验,确定了冰片-HP-β-CD的最佳包合工艺,减少了冰片在制剂中的挥发。
     单因素考察了油相比、乳化剂用量、乳化剂HLB值及稳定剂等处方因素对乳剂质量的影响,并以稳定常数Ke为考察指标设计正交试验筛选出脑清乳剂的最佳处方。同时,单因素考察初乳化温度、初乳化时间、搅拌机转速、高压均质机运转压力及循环次数等工艺因素对乳剂质量的影响,后经正交设计试验筛选出脑清乳剂最优工艺。
     脑清乳剂的处方工艺为:将注射用大豆磷脂,RH40,油酸,维生素E加入薄荷油、石菖蒲油、大豆油混合油相中,将甘油加入三七、川芎提取物水溶液中,在55℃水浴条件下,将水相缓慢加入到油相,同时以10000rpm的速度搅拌5分钟,得初乳。将冰片与麝香酮醇提液加入初乳中在高压均质机中以1000bar压力循环5次,过0.45μm滤膜得脑清乳剂。
     对脑清乳剂中各种药材进行了定性定量检测。建立了川芎、三七、石菖蒲、薄荷及冰片成分的TLC鉴别方法,麝香酮、冰片的GC含量测定方法。为制定脑清乳剂的质量标准提供了依据。
     脑清乳剂为淡黄色均匀乳剂,粒径分布为256±22nm,Zeta电位为-23.50mv,粘滞系数为1.367(10-3Pa﹒s),pH值为6.39。脑清乳剂的离心稳定性研究显示在4000rpm离心15min不分层;冷冻加热循环实验说明脑清乳剂具有较好的聚结稳定性;高温和光照实验显示,脑清乳剂对光、热不稳定;30℃加速6个月和室温(25℃)留样6个月,脑清乳剂的各项考察指标变化不大,满足制剂稳定性要求。进行了脑清乳剂安全性初步评价,证明脑清乳剂对大鼠没有毒性。
     实验证明脑清乳剂是稳定的,无毒的剂型,提高了脂溶性药物的载药量,减少了用药刺激性,符合外用乳剂的要求。
The main component of Nao-Qing Nasal Spray Emulsion, which is used to treatment of AIS, is Moschus, Notoginseng, Ligustici, Rhizoma, Borneol, et al. The feature is multiplicity compositions and multiplicity constitution. The emulsion formulation and nasal cavity dosage are combined in the research of Nao-Qing Emulsion, to make the drugs and nasal mucosa contact closely and continuously, in order to improve the bioavailability, increase compliance treating patients, especially to utilize the feature of dosage form-nasal spray, to strengthen the target to pars encephalica. It is suitable for the ischemic cerebrovascular inadequacies in the acute phase of the emergency treatment. There is none report about emulsion binding Chinese crude drug nasal spray.
     The best extraction tehcnics of muscone, Rhizoma and Mentha haplocalyx were gained by single factor investigation and orthogonal experiment,when effective component contents were as detection index. The result of verification experiment indicated that it was efficient and reproducible.
     In this paper, inclusion compound was made by gripping borneol with hydroxypropyl-β-cyclodextrin(HP-β-CD), in order to reduce the volatilization of borneol in the preparation.
     Effects of oil, emulsifier and stabilizer were studied by single factor test, and based on these we found the best formula by orthogonal design when refining soybean oil, emulsifier and stabilizer were as consideration factors, Ke as investigation index. Effects of emulsification temperature, emulsification time, speed of high-speed mixer, nanomizer working Pressure and cycle times were also investigated by single factor test, and then the orthogonal design was adopted to obtain the optimized preparation procedure.
     Gas chromatography(GC)method was set up to determine the concentration of muscone and borneol.TLC method was used to identify Notoginseng, Ligustici, Rhizoma, Borneol and Mentha haplocalyx.
     The physiochemical properties of Nao-Qing Nasal Spray Emulsion were studied. Gaussian volume-Wt diameter, zeta-potential, viscosity and pH value is 256±22nm, -23.50mV, 1. 367(10~(-3)Pa﹒s), 6.39 respectively.
     The results of accelerating and long-term stability tests indicated that the physical and chemical stability of Nao-Qing Nasal Spray Emulsion were fine and incompliance with the requirement of preparation stability, but it should be tightly preserved form light and heat. There was no creaming after Nao-Qing Nasal Spray Emulsion was centrifugated at speed of 4000 rpm for 15 min, and freezing-heating experiment showed Nao-Qing Nasal Spray Emulsion had better aggregations stability. Meanwhile, preliminary evaluation of the safety of Nao-Qing Nasal Spray Emulsion proved that there was no clear toxicity on mice.
     Experiments show that Nao-Qing Nasal Spray Emulsion, which improves the drug loading of fat-soluble drugs and reduces irritation, is stable, non-toxic formulation, in line with the requirements of external emulsion.
引文
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