Περίληψη:
Methicillin-resistant Staphylococcus aureus (MRSA) strains are important human pathogens and a significant health hazard for hospitals and the food industry. They are resistant to β-lactam antibiotics including methicillin and extremely difficult to treat. In this study, we show that the Staphylococcus aureus COL (MRSA) strain, with a known complete genome, can easily survive and grow under acidic and alkaline conditions (pH5 and pH9, respectively), both planktonically and as a biofilm. A microarray-based analysis of both planktonic and biofilm cells was performed under acidic and alkaline conditions showing that several genes are up- or down-regulated under different environmental conditions and growth modes. These genes were coding for transcription regulators, ion transporters, cell wall biosynthetic enzymes, autolytic enzymes, adhesion proteins and antibiotic resistance factors, most of which are associated with biofilm formation. These results will facilitate a better understanding of the physiological adjustments occurring in biofilm-associated S. aureus COL cells growing in acidic or alkaline environments, which will enable the development of new efficient treatment or disinfection strategies. © Copyright © 2019 Efthimiou, Tsiamis, Typas and Pappas.
Συγγραφείς:
Efthimiou, G.
Tsiamis, G.
Typas, M.A.
Pappas, K.M.
Λέξεις-κλειδιά:
cell surface protein; colicin factor; DNA topoisomerase IV; host factor; phosphate transporter; protein histidine kinase; Staphylococcal enterotoxin k; Staphylococcus enterotoxin; unclassified drug; uridine diphosphate n acetylglucosamine, acidity; alkalinity; antibiotic resistance; Article; bacterial growth; bacterial survival; bacterial virulence; bacterioplankton; bacterium adherence; DNA microarray; DNA synthesis; down regulation; gene control; gene expression; health hazard; ion transport; methicillin resistant Staphylococcus aureus; microarray analysis; molecular genetics; nonhuman; phosphate transport; RNA extraction; transcription regulation; transcriptomics; upregulation
