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Dai L, Wu TQ, Xiong YS, Ni HB, Ding Y, Zhang WC, Chu SP, Ju SQ, Yu J. Ibuprofen-mediated potential inhibition of biofilm development and quorum sensing in Pseudomonas aeruginosa. Life Sci 2019; 237:116947. [PMID: 31605708 DOI: 10.1016/j.lfs.2019.116947] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 09/28/2019] [Accepted: 10/08/2019] [Indexed: 01/01/2023]
Abstract
AIMS Pseudomonas aeruginosa is one of the leading causes of opportunistic and hospital-acquired infections worldwide, which is frequently linked with clinical treatment difficulties. Ibuprofen, a widely used non-steroidal anti-inflammatory drug, has been previously reported to exert antimicrobial activity with the specific mechanism. We hypothesized that inhibition of P. aeruginosa with ibuprofen is involved in the quorum sensing (QS) systems. MAIN METHODS CFU was utilized to assessed the growth condition of P. aeruginosa. Crystal violent staining and acridine orange staining was used to evaluate the biofilm formation and adherence activity. The detection of QS virulence factors such as pyocyanin, elastase, protease, and rhamnolipids were applied to investigation the anti-QS activity of ibuprofen against P. aeruginosa. The production of 3-oxo-C12-HSL and C4-HSL was confirmed by liquid chromatography/mass spectrometry analysis. qRT-PCR was used to identify the QS-related gene expression. Furthermore, we explored the binding effects between ibuprofen and QS-associated proteins with molecular docking. KEY FINDINGS Ibuprofen inhibits P. aeruginosa biofilm formation and adherence activity. And the inhibitory effects of ibuprofen on C4-HSL levels were concentration-dependent (p < 0.05), while it has no effect on 3-oxo-C12-HSL. Moreover, ibuprofen attenuates the production of virulence factors in P. aeruginosa (p < 0.05). In addition, the genes of QS system were decreased after the ibuprofen treatment (p < 0.05). Of note, ibuprofen was binding with LuxR, LasR, LasI, and RhlR at high binding scores. SIGNIFICANCE The antibiofilm and anti-QS activity of ibuprofen suggest that it can be a candidate drug for the treatment of clinical infections with P. aeruginosa.
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Affiliation(s)
- Lu Dai
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, 20 Xi Si Road, Nantong, 226001, PR China; Department of Laboratory Medicine, Kunshan affiliated Hospital of Nanjing University of Chinese Medicine, 189 Chao Yang Road, Kunshan, 215300, PR China
| | - Tian-Qi Wu
- Glenelg Country School, 12793 Folly Quarter Rd, Ellicott City, MD, 21042, USA
| | - Yi-Song Xiong
- Department of Laboratory Medicine, Chengdu Military General Hospital, 270 Tian Hui Road, Chengdu, 610000, PR China
| | - Hong-Bing Ni
- Department of Business and External Cooperation, Affiliated Hospital of Nantong University, 20 Xi Si Road, Nantong, 226001, PR China
| | - Ye Ding
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, 20 Xi Si Road, Nantong, 226001, PR China
| | - Wen-Chen Zhang
- Department of Clinical Laboratory, Wuxi Children's Hospita, No. 299 at Qingyang Road, Wuxi, 214023, PR China
| | - Shao-Peng Chu
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, 20 Xi Si Road, Nantong, 226001, PR China
| | - Shao-Qing Ju
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, 20 Xi Si Road, Nantong, 226001, PR China
| | - Juan Yu
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, 20 Xi Si Road, Nantong, 226001, PR China; Insitute of Public Health, Nantong University, 9 Se Yuan Road, Nantong, 226001, PR China.
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O'Connell KMG, Hodgkinson JT, Sore HF, Welch M, Salmond GPC, Spring DR. Die Bekämpfung multiresistenter Bakterien: aktuelle Strategien zur Entdeckung neuer Antibiotika. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209979] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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O'Connell KMG, Hodgkinson JT, Sore HF, Welch M, Salmond GPC, Spring DR. Combating Multidrug-Resistant Bacteria: Current Strategies for the Discovery of Novel Antibacterials. Angew Chem Int Ed Engl 2013; 52:10706-33. [DOI: 10.1002/anie.201209979] [Citation(s) in RCA: 310] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 02/25/2013] [Indexed: 11/07/2022]
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Cairns S, Thomas JG, Hooper SJ, Wise MP, Frost PJ, Wilson MJ, Lewis MAO, Williams DW. Molecular analysis of microbial communities in endotracheal tube biofilms. PLoS One 2011; 6:e14759. [PMID: 21423727 PMCID: PMC3056660 DOI: 10.1371/journal.pone.0014759] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Accepted: 10/30/2010] [Indexed: 11/22/2022] Open
Abstract
Background Ventilator-associated pneumonia is the most prevalent acquired infection of patients on intensive care units and is associated with considerable morbidity and mortality. Evidence suggests that an improved understanding of the composition of the biofilm communities that form on endotracheal tubes may result in the development of improved preventative strategies for ventilator-associated pneumonia. Methodology/Principal Findings The aim of this study was to characterise microbial biofilms on the inner luminal surface of extubated endotracheal tubes from ICU patients using PCR and molecular profiling. Twenty-four endotracheal tubes were obtained from twenty mechanically ventilated patients. Denaturing gradient gel electrophoresis (DGGE) profiling of 16S rRNA gene amplicons was used to assess the diversity of the bacterial population, together with species specific PCR of key marker oral microorganisms and a quantitative assessment of culturable aerobic bacteria. Analysis of culturable aerobic bacteria revealed a range of colonisation from no growth to 2.1×108 colony forming units (cfu)/cm2 of endotracheal tube (mean 1.4×107 cfu/cm2). PCR targeting of specific bacterial species detected the oral bacteria Streptococcus mutans (n = 5) and Porphyromonas gingivalis (n = 5). DGGE profiling of the endotracheal biofilms revealed complex banding patterns containing between 3 and 22 (mean 6) bands per tube, thus demonstrating the marked complexity of the constituent biofilms. Significant inter-patient diversity was evident. The number of DGGE bands detected was not related to total viable microbial counts or the duration of intubation. Conclusions/Significance Molecular profiling using DGGE demonstrated considerable biofilm compositional complexity and inter-patient diversity and provides a rapid method for the further study of biofilm composition in longitudinal and interventional studies. The presence of oral microorganisms in endotracheal tube biofilms suggests that these may be important in biofilm development and may provide a therapeutic target for the prevention of ventilator-associated pneumonia.
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Affiliation(s)
- Scott Cairns
- University Hospital of Wales, Cardiff, United Kingdom
| | - John Gilbert Thomas
- West Virginia University, Morgantown, West Virginia, United States of America
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[Kinetics of Pseudomonas aeruginosa virulence gene expression during chronic lung infection in the murine model]. Med Mal Infect 2008; 38:318-23. [PMID: 18455339 DOI: 10.1016/j.medmal.2008.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2007] [Accepted: 03/03/2008] [Indexed: 12/28/2022]
Abstract
UNLABELLED Pseudomonas aeruginosa is a Gram-negative bacillus frequently encountered in human diseases. P. aeruginosa produces a large number of secreted and cell associated virulence factors. Their production is coordinated by various systems of gene regulation. The correlation and sequential intervention of regulation systems during a pulmonary infection have not been determined yet. OBJECTIVE The aim of this study was to analyze the expression of three P. aeruginosa virulence genes (exoS, lasI, and algD) during the first seven days of chronic lung infection. To do so, mice were infected intratracheally with agarose beads containing P. aeruginosa. RESULTS The results were a progressive decrease of exoS transcription and an increase of algD, and lasI transcription during infection. This dynamic evolution was consistent with the clinical observation, which demonstrated a progressive loss of type III secretion system function and an increase in the mucoid phenotype development in P. aeruginosa strains from cystic fibrosis patients. CONCLUSION The development of a P. aeruginosa pulmonary chronic infection associates a decrease of gene expression related to a type III secretion system and an increase of alginate production.
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Abstract
Understanding the microbial flora of the cystic fibrosis (CF) respiratory tract is of considerable importance, as patient morbidity and death are primarily caused by chronic respiratory infections. However, chronically colonized CF airways represent a surprisingly complex and diverse ecosystem. The precise contributions of different microbes to patient morbidity, and in particular the importance of inter-specific interactions, remain largely unelucidated. The importance of within-species genetic and phenotypic variation has similarly received limited explicit attention. While a host of studies provide data on the microbial species recovered from patients, these are often incomparable due to differences in sampling and data reporting, or do not present the data in a way that aids our understanding of the ecosystem within each patient. This review brings together a cross-section of recent research on the CF airways and the microbes which infect them. The results presented suggest that understanding the CF lung in terms of its community and evolutionary ecology could benefit our understanding of disease progression and influence treatment regimens.
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Affiliation(s)
- Freya Harrison
- Department of Zoology, University of Oxford, Oxford OX1 3PS, UK
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