Staphylococcus aureus ST398 gene expression profiling during ex vivo colonization of porcine nasal epithelium

Staphylococcus aureus ST398 gene expression profiling during ex vivo colonization of porcine nasal epithelium

Tulinski, P.
Duim, B.
Wittink, F.R.
Jonker, M.J.
Breit, T.M.
Van Putten, J.P.
Wagenaar, J.A.
Fluit, A.C.

Applied Sciences

BN/Bionanoscience

2014-10-20

Background Staphylococcus aureus is a common human and animal opportunistic pathogen. In humans nasal carriage of S. aureus is a risk factor for various infections. Methicillin-resistant S. aureus ST398 is highly prevalent in pigs in Europe and North America. The mechanism of successful pig colonization by MRSA ST398 is poorly understood. Previously, we developed a nasal colonization model of porcine nasal mucosa explants to identify molecular traits involved in nasal MRSA colonization of pigs. Results We report the analysis of changes in the transcription of MRSA ST398 strain S0462 during colonization on the explant epithelium. Major regulated genes were encoding metabolic processes and regulation of these genes may represent metabolic adaptation to nasal mucosa explants. Colonization was not accompanied by significant changes in transcripts of the main virulence associated genes or known human colonization factors. Here, we documented regulation of two genes which have potential influence on S. aureus colonization; cysteine extracellular proteinase (scpA) and von Willebrand factor-binding protein (vWbp, encoded on SaPIbov5). Colonization with isogenic-deletion strains (?vwbp and ?scpA) did not alter the ex vivo nasal S. aureus colonization compared to wild type. Conclusions Our results suggest that nasal colonization with MRSA ST398 is a complex event that is accompanied with changes in bacterial gene expression regulation and metabolic adaptation.

MRSA ST398
microarray
colonization
ex vivo model
OA-Fund TU Delft

http://resolver.tudelft.nl/uuid:0b39dd1b-07ae-4af9-9d03-a67b16066253

https://doi.org/10.1186/1471-2164-15-915

BioMed Central

1471-2164

http://www.biomedcentral.com/1471-2164/15/915

BMC Genomics, 15, 2014

Institutional Repository

journal article

© 2014 The Author(s)
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.