Relation between the hemolytic property and iron metabolism in Escherichia coli.

G Lebek; H M Gruenig

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Relation between the hemolytic property and iron metabolism in Escherichia coli.

机译：大肠杆菌的溶血特性与铁代谢之间的关系。

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The hemolytic activity of wild-type strains of Escherichia coli was measured by a standardized method in liquid broth. The system also allowed us to investigate the influence of various Fe3+ concentrations in the cultures on the amount of secreted hemolysin. We found that the hemolysin secretion of all strains was clearly reduced after addition of FeCl3. However, the influence of additional iron chelators showed remarkable differences. The hemolytic activity of Hly plasmid-containing strains isolated in Berne significantly increased. Most of the strains with a chromosomal hemolysin determinant showed a similar effect, but to a lesser degree. Contrary to this, Hly plasmid-containing strains isolated in Essex and some strains with chromosomal hemolysin determinant were either not affected or even showed reduced hemolysin secretion after limitation of free iron ions in the broth. Our results suggest that hemolysin secretion in E. coli is related to the bacterial iron metabolism, and hemolysin secretion is differentially regulated among E. coli strains.

机译：通过标准化方法在液体肉汤中测量野生型大肠杆菌的溶血活性。该系统还使我们能够研究培养物中各种Fe3 +浓度对溶血溶血素分泌量的影响。我们发现，添加FeCl3后，所有菌株的溶血素分泌均明显减少。但是，其他铁螯合剂的影响显示出显着差异。在伯尔尼分离的含Hly质粒的菌株的溶血活性显着提高。具有染色体溶血素决定簇的大多数菌株显示出相似的作用，但程度较小。与此相反，在肉汤中游离铁离子受到限制后，在艾塞克斯分离的含Hly质粒的菌株以及某些具有染色体溶血素决定簇的菌株未受到影响，甚至显示出溶血素分泌减少。我们的结果表明，大肠杆菌中的溶血素分泌与细菌铁代谢有关，并且在大肠杆菌菌株中溶血素的分泌受到差异调节。

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《Infection and immunity》 |1985年第3期|共5页
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G Lebek; H M Gruenig;
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中图分类医学免疫学;
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6. Relation between the hemolytic property and iron metabolism in Escherichia coli. [O] . G Lebek, H M Gruenig 1985

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Relation between the hemolytic property and iron metabolism in Escherichia coli.

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