摘要
抗菌肽(AMPs)是先天免疫系统中最常见的成分之一,可保护多细胞生物免受微生物侵袭。绝大多数AMPs是从蛙皮中分离出来的。 Anuran(青蛙和蟾蜍)皮肤含有丰富的AMP,可以通过治疗来开发。这样的肽是独特但多样的分子组。通常,超过50%的氨基酸残基形成分子的疏水部分。通常,没有保守的结构基序负责活性,尽管由于存在多个赖氨酸残基,绝大多数AMPs是阳离子的。这种阳离子性与抗菌活性密切相关。值得注意的是,最近的证据表明,在蛙皮中合成AMPs可以赋予特定物种以优势,尽管它们对生存并不是必需的。青蛙皮肤的AMP通过渗透和破坏质膜并使细胞内靶失活,从而对抗生素抗性细菌,原生动物,酵母和真菌发挥有效作用。重要的是,由于它们不与特异性受体结合,因此AMPs不太可能诱导耐药机制。当前,最著名的两栖动物AMP是七叶草素,brevinins,ranacyclins,ranatuerins,nigrocin-2,magainins,dermaseptins,bombinins,temporins和japonicins-1和-2以及palustrin-2。这篇综述着重于这些青蛙皮肤的AMP及其抗菌活性的潜在机制。我们希望这次审查将提供进一步的信息,以促进对AMPs的进一步研究,并为新型和更安全的杀菌剂提供新的思路。
关键词: 抗菌肽(AMPs),抗菌,两栖防御肽,七叶草素,短纤维蛋白,雷纳环素,拉那豆素。
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