Kirillova Anna V, Danilushkina Anna A, Irisov Denis S, Bruslik Nataliya L, Fakhrullin Rawil F, Zakharov Yuri A, Bukhmin Vladimir S, Yarullina Dina R
Department of Microbiology, Kazan Federal University, Kremlevskaya St. 18, Kazan 420008, Russia.
Bionanotechnology Lab, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kreml uramı 18, Kazan, Tatarstan 420008, Russia.
Int J Microbiol. 2017;2017:9869145. doi: 10.1155/2017/9869145. Epub 2017 Jan 4.
Cadmium (Cd) and lead (Pb) are heavy metals, important environmental pollutants, and potent toxicants to organism. Lactic acid bacteria (LAB) have been reported to remove Cd and Pb from solutions and therefore represent a useful tool for decontamination of food and beverages from heavy metals. Heavy metal ion binding by LAB was reported as metabolism-independent surface process. In this work ten strains were investigated with respect to hydrophobicity, Lewis acid-base, and electrostatic properties of their outer cell surface in order to characterize their Cd and Pb removal capacity. Seven and strains were shown to remove Cd from culture medium. The metabolism-dependent accumulation mechanism of Cd removal was proposed based on extended character of Cd binding and lack of correlation between any of the surface characteristics and Cd removal. The results of this study should be considered when selecting probiotic strains for people at risk of Cd exposure.
镉（Cd）和铅（Pb）是重金属，是重要的环境污染物，对生物体具有很强的毒性。据报道，乳酸菌（LAB）可从溶液中去除Cd和Pb，因此是去除食品和饮料中重金属的有用工具。据报道，LAB对重金属离子的结合是一种与代谢无关的表面过程。在这项工作中，研究了10株菌株的细胞外表面的疏水性、路易斯酸碱和静电性质，以表征它们去除Cd和Pb的能力。有7株菌株被证明能从培养基中去除Cd。基于Cd结合的扩展特性以及任何表面特征与Cd去除之间缺乏相关性，提出了Cd去除的代谢依赖性积累机制。在为有Cd暴露风险的人群选择益生菌菌株时，应考虑本研究的结果。
