The effect of skin fatty acids on Staphylococcus aureus.

The effect of skin fatty acids on Staphylococcus aureus.
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DOI:
10.1007/s00203-014-1048-1
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发表时间:
2015-03
影响因子:
2.8
通讯作者:
Foster, Simon J.
Foster, Simon J.
中科院分区:
生物学4区
文献类型:
--
作者:
Neumann, Yvonne;Ohlsen, Knut;Donat, Stefanie;Engelmann, Susanne;Kusch, Harald;Albrecht, Dirk;Cartron, Michael;Hurd, Alexander;Foster, Simon J.

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金黄色葡萄球菌是人类鼻子和皮肤的共生菌。人体皮肤脂肪酸,特别是顺式6-十六碳烯酸(C-6-H),具有很高的抗葡萄球菌活性,可以抑制毒力决定簇的产生。在这里,我们表明 C-6-H 的亚 MIC 水平会导致耐药性增加。通过转录组和蛋白质组组合分析研究了 C-6-H 活性的机制。蛋白质组分析证明了 C-6-H 对毒力决定簇产生的多效性作用。针对 C-6-H,转录组学揭示了 500 多个基因的表达发生改变,涉及毒力和细胞生理学的许多方面。毒素(hla、hlb、hlgBC)的表达减少,而宿主防御逃避成分(cap、sspAB、katA)的表达增加。特别是,SaeRS 调节子的成员的表达大大降低,并且特定突变体的使用表明对毒素产生的影响可能是通过 SaeRS 介导的。 本文的在线版本 (doi:10.1007/s00203-014-1048-1) 包含补充材料,可供授权用户使用。
Staphylococcus aureus is a commensal of the human nose and skin. Human skin fatty acids, in particular cis-6-hexadecenoic acid (C-6-H), have high antistaphylococcal activity and can inhibit virulence determinant production. Here, we show that sub-MIC levels of C-6-H result in induction of increased resistance. The mechanism(s) of C-6-H activity was investigated by combined transcriptome and proteome analyses. Proteome analysis demonstrated a pleiotropic effect of C-6-H on virulence determinant production. In response to C-6-H, transcriptomics revealed altered expression of over 500 genes, involved in many aspects of virulence and cellular physiology. The expression of toxins (hla, hlb, hlgBC) was reduced, whereas that of host defence evasion components (cap, sspAB, katA) was increased. In particular, members of the SaeRS regulon had highly reduced expression, and the use of specific mutants revealed that the effect on toxin production is likely mediated via SaeRS. The online version of this article (doi:10.1007/s00203-014-1048-1) contains supplementary material, which is available to authorized users.
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发表时间: 2008-04-01
影响因子: 3.1
作者:
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期刊: JOURNAL OF GENERAL MICROBIOLOGY
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发表时间: 2004-03-01
影响因子: 3.6
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