用于保护口腔疫苗,体外和体内评估的微肠

由于单一的物流,大规模疫苗接种潜力和粘膜免疫力,口腔疫苗非常适合。由于高安全性,亚基疫苗是优选的,但是本质上难以口服地输送,从而提供用于使用先进的口腔递送系统的动机。为此目的测试千分尺尺寸(微肠器)中的聚合物装置。用卵巢和QuiL-A的喷雾干燥立方体组成的疫苗加载,并涂有pH敏感的盖子,用于口服递送至C57BL / 6小鼠。在体外和体内探讨微肠术,以便在口腔纯度促进设置中作为口腔疫苗输送系统,并且在皮下注射素后作为口服增压器。小肠中微肠器的停留时间不到1小时。因此,Eudragit®L100-55选择在微肠器上的盖材料,因为它在pH4.7的体外保持稳定,其模拟胃的最大pH值,并在pH6.6中允许在30-60min内释放缔约置物小肠的远端半部的平均pH值。体外小角度X射线散射显示,当不局限于微肠器中但是当装入微肠子内时,它们被释放为己粒剂时溶解在小肠液中。然而,虽然微肠器可以在体外保护和释放卵子和quil-a的粒子,但在口服给药后体内引发免疫应答。 Nonetheless, some effect was observed when the microcontainers were used to deliver oral boosters following a subcutaneous prime. This work indicates that oral vaccination with subunit vaccines has potential when combined with a parenteral prime and that oral delivery systems like microcontainers may be used to increase the potency of vaccines with low oral immunogenicity.

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