Global gene expression of Listeria monocytogenes to salt stress

Journal of Food Protection
Dongryeoul BaeChinling Wang

Abstract

Outbreaks of listeriosis caused by the ingestion of Listeria-contaminated ready-to-eat foods have been reported worldwide. Many ready-to-eat foods, such as deli meat products, contain high amounts of salt, which can disrupt the maintenance of osmotic balance within bacterial cells. To understand how Listeria monocytogenes adapts to salt stress, we examined the growth and global gene expression profiles of L. monocytogenes strain F2365 under salt stress using oligonucleotide probe-based DNA array and quantitative real-time PCR (qRT-PCR) analyses. The growth of L. monocytogenes in brain heart infusion (BHI) medium with various concentrations of NaCl (2.5, 5, and 10%) was significantly inhibited (P < 0.01) when compared with growth in BHI with no NaCl supplementation. Microarray data indicated that growth in BHI medium with 1.2% NaCl upregulated 4 genes and down-regulated 24 genes in L. monocytogenes, which was confirmed by qRT-PCR. The transcript levels of genes involved in the uptake of glycine betaine/(L)-proline were increased, whereas genes associated with a putative phosphoenolpyruvate-dependent sugar phosphotransferase system (PTS), metabolic enzymes, and virulence factor were down-regulated. Specifically, the expression le...Continue Reading

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Citations

Aug 27, 2013·Applied and Environmental Microbiology·Dongryeoul BaeChinling Wang
Jul 6, 2016·Molecular Microbiology·TuAnh Ngoc HuynhJoshua J Woodward
Jan 9, 2013·Letters in Applied Microbiology·E Wałecka-ZacharskaT Stefaniak
Dec 18, 2018·Frontiers in Microbiology·Florentina Ionela BucurAnca Ioana Nicolau
Feb 26, 2014·Journal of Proteome Research·Joseph R PittmanJanet R Donaldson

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