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Overexpression of SOS genes in ciprofloxacin resistant Escherichia coli mutants.
- Source :
-
Gene [Gene] 2016 Jan 15; Vol. 576 (1 Pt 1), pp. 115-8. Date of Electronic Publication: 2015 Oct 02. - Publication Year :
- 2016
-
Abstract
- Introduction: Fluoroquinolones are important antibiotics for the treatment of urinary tract infections caused by Escherichia coli. Mutational studies have shown that ciprofloxacin, a member of fluoroquinolones induces SOS response and mutagenesis in pathogenic bacteria which in turn develop antibiotic resistance. However, inhibition of SOS response can increase recombination activity which in turn leads to genetic variation.<br />Objective: The aim of this study was to measure 5 SOS genes expressions in nine E. coli mutants with different MICs for ciprofloxacin following exposure to ciprofloxacin.<br />Methods: Gene expression was assessed by quantitative real time PCR. Gene alteration assessment was conducted by PCR amplification and DNA sequencing.<br />Results: Results showed that the expression of recA was increased in 5 mutants. This overexpression is not related to gene alteration, and enhances the expression of polB and umuCD genes encoding nonmutagenic and mutagenic polymerases, respectively. The direct relationship between the level of SOS expression and the level of resistance to ciprofloxacin was also indicated.<br />Conclusion: It was concluded that novel therapeutic strategy that inhibits RecA activity would enhance the efficiency of common antibiotics against pathogenic bacteria.<br /> (Copyright © 2015 Elsevier B.V. All rights reserved.)
- Subjects :
- Gene Expression Regulation, Bacterial drug effects
Ciprofloxacin pharmacology
Drug Resistance, Bacterial drug effects
Drug Resistance, Bacterial genetics
Escherichia coli genetics
Escherichia coli metabolism
Escherichia coli Proteins biosynthesis
Escherichia coli Proteins genetics
Mutation
SOS Response, Genetics drug effects
SOS Response, Genetics genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1879-0038
- Volume :
- 576
- Issue :
- 1 Pt 1
- Database :
- MEDLINE
- Journal :
- Gene
- Publication Type :
- Academic Journal
- Accession number :
- 26432001
- Full Text :
- https://doi.org/10.1016/j.gene.2015.09.069