“人造病毒”双重身份,基因治疗&杀菌

2016-02-01 佚名 生物谷

科学家们成功地利用人乳中的关键蛋白制作了一类“人造病毒”,这一“人造病毒”具备杀伤耐药性细菌的能力。 这一类人造病毒能够通过对细菌细胞膜进行穿孔达到杀伤细菌的目的。这意味着细菌几乎没有机会对这一类“武器”进行抵抗。然而,真正令人兴奋的还不止于此。这一类病毒还能作为进行治疗的工具用于治愈人类的疾病。 乳汁中富含大量有重要作用的蛋白质,除了帮助宝宝正常生长发育,同时能够保证在他们生长发育的关键

科学家们成功地利用人乳中的关键蛋白制作了一类“人造病毒”,这一“人造病毒”具备杀伤耐药性细菌的能力。

这一类人造病毒能够通过对细菌细胞膜进行穿孔达到杀伤细菌的目的。这意味着细菌几乎没有机会对这一类“武器”进行抵抗。然而,真正令人兴奋的还不止于此。这一类病毒还能作为进行治疗的工具用于治愈人类的疾病。

乳汁中富含大量有重要作用的蛋白质,除了帮助宝宝正常生长发育,同时能够保证在他们生长发育的关键时期内免疫系统的正常运转。其中一类关键蛋白叫做Lactoferrin,该蛋白质能够杀伤大量病毒、真菌以及细菌。

Lac蛋白的抗菌活性主要依赖于其某一段的氨基酸片段。来自伦敦学院大学,英国国家物理实验室的研究者们认为这些氨基酸片段应该首先聚集起来,然后起到靶向杀伤病原微生物的作用。

正如你想到的,这是一个很简单的化学特性。因此研究者们尝试依靠这些氨基酸片段的性质创建一个新型的药物输送系统。为了达成这一目的,他们将氨基酸片段搭建成一个微型的“笼子”,这一结构能够自我组装形成类似于病毒外壳的结构,并能够起到杀伤细菌的作用。

“结果十分惊人”,研究者之一Hasan Alkassem说到,“这些小分子整合之后能够像子弹那样直接在细菌的细胞膜上穿孔”。最有意义的是,这些小分子并不会对人体细胞产生危害,而仅仅是像普通病毒那样,能够与细胞膜进行融合,从而将内容物释放到胞浆中。

这一特性使得这一人造“病毒”同时具备了杀伤细菌与运送药物的双重活性。

之后,科学家们开始在这一“人造病毒”腔内放置用于基因治疗的重组DNA片段。这一人工病毒载体相比于常规的病毒载体,具备识别病原微生物膜与宿主细胞膜的能力。这一特性可以帮助其更好地输送药物,同时起到杀灭病原体的作用。

原始出处:

A protein found in human breast milk could help kill drug-resistant bacteria


 

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    2018-03-21 1e145228m78(暂无匿称)

    学习了.谢谢作者分享!

    0

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    2016-02-20 lyh994

    识别的机制是什么?既然乳汁中能分泌,就说明人体能自分泌,机制又是什么?难道世间万物真的自有解药?

    0

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    2016-02-03 hb2014ye
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    2016-02-01 李继凯

    了解

    0