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首页> 外文期刊>Probiotics and Antimicrobial Proteins >The Acid Tolerance Response Alters Membrane Fluidity and Induces Nisin Resistance in Listeria monocytogenes
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The Acid Tolerance Response Alters Membrane Fluidity and Induces Nisin Resistance in Listeria monocytogenes

机译：耐酸响应改变膜流动性并诱导单核细胞增生性李斯特氏菌对乳链菌肽的抗性

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摘要

The ability of L. monocytogenes cells to adapt to a variety of stressors contributes to its growth in a wide range of foods. The present study examines the effect of acid and of the acid tolerance response (ATR) on membrane fluidity and on the organism’s resistance to acid and to the bacteriocin nisin. When ATR was induced in wild-type cells, these cells also became resistant to nisin. ATR(+) cells also had lower membrane rigidities than control ATR(?) cells that had not been subjected to the acid tolerance response. However, cells that were genetically resistant to nisin did not show any significant (P < 0.05) change in rigidity when grown in the presence of nisin. These studies suggest that the use of acid and nisin for L. monocytogenes control in ready-to-eat foods may be compromised if cross-resistance emerges.
机译：单核细胞增生李斯特氏菌细胞适应多种应激源的能力有助于其在多种食品中的生长。本研究研究了酸和酸耐受反应（ATR）对膜流动性以及有机体对酸和细菌素乳链菌肽的抗性的影响。当在野生型细胞中诱导ATR时，这些细胞也对乳链菌肽产生抗性。 ATR（+）细胞还具有比未进行耐酸反应的对照ATR（β）细胞更低的膜刚性。但是，在乳链菌肽存在下生长时，对乳链菌肽具有遗传抗性的细胞在刚度上没有显示任何明显的变化（P <0.05）。这些研究表明，如果出现交叉耐药性，则即食食品中使用酸和乳酸​​链球菌素控制单核细胞增生李斯特菌可能会受到影响。

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