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搜狐全球医讯 | 斯坦福大学发明无针疫苗,皮肤一抹就能起效?

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作者 | 周亦川

编辑 | 吴施楠

疫苗是人类对抗微生物感染的重要武器,然而接种疫苗往往需要扎针,还有一系列副作用,让人抗拒不已。近期斯坦福大学科学家发现皮肤表面常见细菌具有神奇免疫功效,将它通过基因改造制成的疫苗药膏一抹见效,可为老鼠提供强大的免疫力。

表面葡萄球菌可在人类皮肤表面及毛囊内大量存活,被发现具有抵抗流感病毒入侵的潜力。课题组将细菌溶液涂抹在小鼠头顶,接下来的六周内发现小鼠体内抗体增高,甚至比接种疫苗更高。使用人类血液测试,也获得了一致的结果。

表面葡萄球菌存在一种叫Aap的蛋白质,可以获取外来的蛋白片段提交免疫系统识别,刺激IgG和IgA抗体升高。课题组在该Aap蛋白上编码一段破伤风基因片段制成药膏给小鼠涂抹,六周内小鼠产生了极高水平的破伤风抗体,注射致命量的破伤风毒素后安全存活。

第二项测试是白喉毒素基因,小鼠涂抹后也产生了大量的白喉毒素抗体。

接下来课题组将启动猴子实验,如果成功将有望进入临床试验阶段,为人类抵抗微生物入侵提供更加高效且无痛的手段。

发布于:北京市