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首页> 外文期刊>International Journal of Pharmaceutics >M-cell targeted delivery of recombinant hepatitis B surface antigen using cholera toxin B subunit conjugated bilosomes.
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M-cell targeted delivery of recombinant hepatitis B surface antigen using cholera toxin B subunit conjugated bilosomes.

机译:使用霍乱毒素B亚基结合的双体,通过M细胞靶向递送重组乙肝表面抗原。

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摘要

The present study aims to improve upon our earlier findings with bilosomes as potential delivery vehicle through oral route for recombinant hepatitis B surface antigen (HBsAg). The work entails the conjugation of bilosomal system with cholera toxin B subunit (CTB) to increase transmucosal uptake via M-cell specific delivery approach. The study encompasses the development and characterization of HBsAg-loaded CTB-conjugated system for percent antigen entrapment, size, shape, and stability in SGF (USP, pH 1.2), SIF (USP, pH 7.5) and in bile salt solutions. Biological activity of CTB, subsequent to conjugation, was verified by hemagglutination test. Anti-HBsAg IgG response in serum and anti-HBsAg sIgA in various body secretions were estimated using ELISA, following oral immunization with 10 microg dose-loaded CTB-conjugated bilosomes (CTB2) and 20 microg dose-loaded CTB-conjugated bilosomes (CTB1) in BALB/c mice. The results showed that CTB1 produced anti-HBsAg IgG antibody titre response comparable to that of the intramuscular (i.m.) injection of 10 microg of alum-adsorbed HBsAg. Moreover, all the bilosomal preparations elicited measurable sIgA vis-a-vis negligible response with i.m. administered HBsAg. Thus, HBsAg-loaded CTB-conjugated bilosomes provide a promising potential for targeted oral immunization against hepatitis B.
机译:本研究旨在改进我们早先的发现,以双体作为潜在的通过口服途径传递重组乙型肝炎表面抗原(HBsAg)的载体。这项工作需要将双体系统与霍乱毒素B亚基(CTB)结合,以通过M细胞特异性递送方法增加跨粘膜摄取。这项研究涵盖了HBsAg加载的CTB偶联系统的开发和表征,以了解SGF(USP,pH 1.2),SIF(USP,pH 7.5)和胆盐溶液中的抗原包封率,大小,形状和稳定性。结合后,CTB的生物学活性通过血凝试验证实。在分别用10微克剂量的CTB结合胆汁小体(CTB2)和20微克剂量的CTB结合胆汁小体(CTB1)口服免疫后,使用ELISA评估了血清中的抗HBsAg IgG反应和各种身体分泌物中的抗HBsAg sIgA。在BALB / c小鼠中。结果表明,CTB1产生的抗HBsAg IgG抗体滴度反应与肌肉注射10 µg铝吸附的HBsAg相当。此外,所有双链体制剂均引起可测量的sIgA相对于i.m的微不足道的反应。服用HBsAg。因此,负载HBsAg的CTB结合胆汁小体为针对乙型肝炎的靶向口服免疫提供了有希望的潜力。

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