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基于非离子表面活性剂的囊泡(非离子脂质体)用于乙型肝炎的非侵入性局部基因免疫。

Non-ionic surfactant based vesicles (niosomes) for non-invasive topical genetic immunization against hepatitis B.

作者信息

Vyas S P, Singh R P, Jain Sanyog, Mishra Vivek, Mahor Sunil, Singh Paramjit, Gupta P N, Rawat A, Dubey P

机构信息

Drug Delivery Research Laboratory, Department of Pharmaceutical Sciences, Dr. Harisingh Gour Vishwavidyalaya, Sagar 470 003, Madhya Pradesh, India.

出版信息

Int J Pharm. 2005 May 30;296(1-2):80-6. doi: 10.1016/j.ijpharm.2005.02.016. Epub 2005 Apr 7.

Abstract

DNA vaccines are capable of eliciting both humoral as well as cellular immune responses. Liposomes have been widely employed for DNA delivery through topical route; however, they suffer from certain drawbacks like higher cost and instability. In present study, non-ionic surfactant based vesicles (niosomes) for topical DNA delivery have been developed. DNA encoding hepatitis B surface antigen (HBsAg) was encapsulated in niosomes. Niosomes composed of span 85 and cholesterol as constitutive lipids were prepared by reverse phase evaporation method. Prepared niosomes were characterized for their size, shape and entrapment efficiency. The immune stimulating activity was studied by measuring serum anti-HBsAg titer and cyokines level (IL-2 and IFN-gamma) following topical application of niosomes in Balb/c mice and results were compared with naked DNA and liposomes encapsulated DNA applied topically as well as naked DNA and pure recombinant HBsAg administered intramuscularly. It was observed that topical niosomes elicited a comparable serum antibody titer and endogenous cytokines levels as compared to intramuscular recombinant HBsAg and topical liposomes. The study signifies the potential of niosomes as DNA vaccine carriers for effective topical immunization. The proposed system is simple, stable and cost effective compared to liposomes.

摘要

DNA疫苗能够引发体液免疫反应和细胞免疫反应。脂质体已被广泛用于通过局部途径递送DNA;然而,它们存在一些缺点,如成本较高和稳定性差。在本研究中,已开发出用于局部递送DNA的基于非离子表面活性剂的囊泡(非离子脂质体)。编码乙型肝炎表面抗原(HBsAg)的DNA被包裹在非离子脂质体中。通过反相蒸发法制备了由司盘85和胆固醇作为组成脂质的非离子脂质体。对制备的非离子脂质体的大小、形状和包封效率进行了表征。通过在Balb/c小鼠局部应用非离子脂质体后测量血清抗HBsAg滴度和细胞因子水平(IL-2和IFN-γ)来研究免疫刺激活性,并将结果与局部应用的裸DNA和脂质体包裹的DNA以及肌肉注射的裸DNA和纯重组HBsAg进行比较。观察到与肌肉注射的重组HBsAg和局部应用的脂质体相比,局部应用的非离子脂质体引发了相当的血清抗体滴度和内源性细胞因子水平。该研究表明非离子脂质体作为DNA疫苗载体用于有效局部免疫的潜力。与脂质体相比,所提出的系统简单、稳定且具有成本效益。

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