摘要
铁被认为是自然界中最基本的元素,很难被微生物吸收。从自然界获取铁变得越来越复杂,比如铁(II)在氧的存在下被氧化成(III)氧化物和氢氧化物,在中性pH下变得无法溶解。微生物似乎产生了称为铁载体的有机分子,以克服这一条件。铁载体的基本功能是连接铁(II),使其溶解并使细胞吸收。除铁粒子外,这些铁载体有能力螯合其他已配置的各种金属颗粒,以集中使用铁载体在伤口护理项目。在感染过程中,宿主与病原菌之间存在着严重的冲突。微生物通过产生铁载体,即小的铁结合分子来获得铁。作为回应,宿主免疫细胞产生脂钙素2,以防止细菌再摄取含铁的铁载体。一些细菌被认为会产生抗脂钙素2的铁载体来对抗这种风险。这篇文章的目的是讨论最近描述的作用和应用细菌铁胞。
关键词: 铁载体,微生物毒力,分泌机制,与金属的相互作用,免疫反应,医学应用
图形摘要
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