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Duque-Sanchez L, Qu Y, Voelcker NH, Thissen H. Tackling catheter-associated urinary tract infections with next-generation antimicrobial technologies. J Biomed Mater Res A 2024; 112:312-335. [PMID: 37881094 DOI: 10.1002/jbm.a.37630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/21/2023] [Accepted: 10/10/2023] [Indexed: 10/27/2023]
Abstract
Urinary catheters and other medical devices associated with the urinary tract such as stents are major contributors to nosocomial urinary tract infections (UTIs) as they provide an access path for pathogens to enter the bladder. Considering that catheter-associated urinary tract infections (CAUTIs) account for approximately 75% of UTIs and that UTIs represent the most common type of healthcare-associated infections, novel anti-infective device technologies are urgently required. The rapid rise of antimicrobial resistance in the context of CAUTIs further highlights the importance of such preventative strategies. In this review, the risk factors for pathogen colonization in the urinary tract are dissected, taking into account the nature and mechanistics of this unique environment. Moreover, the most promising next-generation preventative strategies are critically assessed, focusing in particular on anti-infective surface coatings. Finally, emerging approaches in this field and their likely clinical impact are examined.
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Affiliation(s)
- Lina Duque-Sanchez
- Department of Manufacturing, Commonwealth Scientific and Industrial Research Organization (CSIRO), Clayton, Victoria, Australia
- Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Yue Qu
- Infection and Immunity Program, Department of Microbiology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Nicolas H Voelcker
- Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
- Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility, Materials Science and Engineering, Monash University, Clayton, Victoria, Australia
| | - Helmut Thissen
- Department of Manufacturing, Commonwealth Scientific and Industrial Research Organization (CSIRO), Clayton, Victoria, Australia
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Chadha J, Khullar L, Gulati P, Chhibber S, Harjai K. Repurposing albendazole as a potent inhibitor of quorum sensing-regulated virulence factors in Pseudomonas aeruginosa: Novel prospects of a classical drug. Microb Pathog 2024; 186:106468. [PMID: 38036112 DOI: 10.1016/j.micpath.2023.106468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 12/02/2023]
Abstract
Pseudomonas aeruginosa has emerged as a critical superbug that poses a serious threat to public health. Owing to its virulence and multidrug resistance profiles, the pathogen demands immediate attention for devising alternate intervention strategies. In an attempt to repurpose drugs against P. aeruginosa, this preclinical study was aimed at investigating the antivirulence prospects of albendazole (AbZ), an FDA-approved anti-helminthic drug, recently predicted to disrupt quorum sensing (QS) in Chromobacterium violaceum. AbZ was scrutinized for its quorum quenching (QQ) prospects, effect on bacterial virulence, different motility phenotypes, and biofilm formation in vitro. Additionally, in silico analysis was employed to predict the molecular interactions between AbZ and QS receptors. At sub-inhibitory levels, AbZ demonstrated anti-QS activity and significantly abrogated AHL biosynthesis in P. aeruginosa. Moreover, AbZ significantly downregulated the transcript levels of QS- (lasI/lasR, rhlI/rhlR, and pqsA/pqsR) and QS-dependent virulence (aprA, lasA, lasB, plcH, and toxA) genes in P. aeruginosa. This coincided with reduced hemolysin, alginate, pyocyanin, rhamnolipids, total protease, and elastase production, thereby lowering phenotypic virulence. Molecular docking with AbZ further revealed strong associations and high binding energies with LasR (-8.8 kcal/mol), RhlR (-6.5 kcal/mol), and PqsR (-6.3 kcal/mol) receptors. AbZ also impeded bacterial motility and abolished EPS production, severely compromising pseudomonal biofilm formation. For the first time, AbZ was shown to interfere with QS circuitry and consequently disarming pseudomonal virulence. Hence, AbZ can be exploited for its antivirulence properties against P. aeruginosa.
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Affiliation(s)
- Jatin Chadha
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Lavanya Khullar
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Pallavi Gulati
- RLA College, University of Delhi (South Campus), New Delhi, India
| | - Sanjay Chhibber
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Kusum Harjai
- Department of Microbiology, Panjab University, Chandigarh, India.
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Tarabal VS, Abud YKD, da Silva FG, da Cruz LF, Fontes GN, da Silva JA, Filho CBS, Sinisterra RD, Granjeiro JM, Granjeiro PA. Effect of DMPEI coating against biofilm formation on PVC catheter surface. World J Microbiol Biotechnol 2023; 40:6. [PMID: 37932532 DOI: 10.1007/s11274-023-03799-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 10/09/2023] [Indexed: 11/08/2023]
Abstract
Urinary tract infections (UTIs) are a significant cause of morbidity in healthcare systems and are prominently associated with applying urethral catheters, particularly in surgeries. Polyvinyl chloride (PVC) is extensively utilized in the fabrication of catheters. Biofilms, complex polymeric constructions, provide a protective milieu for cell multiplication and the enhancement of antibiotic resistance. Strategies to counteract biofilm development on medical apparatuses' surfaces incorporate antimicrobial agents such as N,N-dodecyl, and methyl polyethylenimine (DMPEI). This research endeavored to characterize the morphology of PVC and PVC-DMPEI surfaces utilizing Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) and to gauge hydrophobicity through contact angle measurements. Employing Escherichia coli, Staphylococcus aureus, and Candida albicans in adhesion assays enabled the assessment of DMPEI's efficacy in preventing microbial adherence to PVC. Butanol successfully solubilized 2 mg.mL-1 DMPEI without altering the PVC structure. SEM results substantiated the formation of a DMPEI layer on the PVC surface, which led to decreased surface roughness, as validated by AFM, and increased hydrophilicity, as demonstrated by contact angle evaluations. E. coli, S. aureus, and C. albicans exhibited significant adhesion reduction, 89.3%, 94.3%, and 86.6% on PVC-DMPEI surfaces. SEM visualizations confirmed reduced cellular colonization on PVC-DMPEI and highlighted considerable morphological modifications in E. coli. Consequently, DMPEI films effectively minimize the adhesion of E. coli, S. aureus, and C. albicans on PVC surfaces. DMPEI, with its potential as a protective coating for innovative medical devices, promises to inhibit biofilm adherence effectively.
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Affiliation(s)
- Vinícius S Tarabal
- Campus Centro Oeste, Federal University of São João Del-Rei, Av. Sebastião Gonçalves Coelho, 400 Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil
| | - Yuri K D Abud
- National Institute of Metrology, Quality and Technology, Av. Nossa Sra. das Graças, 50 - Xerém, Duque de Caxias, RJ, 25250-020, Brazil
| | - Flávia G da Silva
- Chemistry Department, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG, 31270-901, Brazil
| | - Luisa F da Cruz
- Campus Centro Oeste, Federal University of São João Del-Rei, Av. Sebastião Gonçalves Coelho, 400 Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil
| | - Giselle N Fontes
- National Institute of Metrology, Quality and Technology, Av. Nossa Sra. das Graças, 50 - Xerém, Duque de Caxias, RJ, 25250-020, Brazil
| | - Jose A da Silva
- Campus Centro Oeste, Federal University of São João Del-Rei, Av. Sebastião Gonçalves Coelho, 400 Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil
| | - Celso B S Filho
- National Institute of Metrology, Quality and Technology, Av. Nossa Sra. das Graças, 50 - Xerém, Duque de Caxias, RJ, 25250-020, Brazil
| | - Ruben D Sinisterra
- Chemistry Department, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG, 31270-901, Brazil
| | - Jose M Granjeiro
- National Institute of Metrology, Quality and Technology, Av. Nossa Sra. das Graças, 50 - Xerém, Duque de Caxias, RJ, 25250-020, Brazil
- Fluminense Federal University, R. Mario Santos Braga, 28 - Centro, Niteroi, RJ, 24020-150, Brazil
| | - Paulo A Granjeiro
- Campus Centro Oeste, Federal University of São João Del-Rei, Av. Sebastião Gonçalves Coelho, 400 Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil.
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Chadha J, Khullar L, Gulati P, Chhibber S, Harjai K. Anti-virulence prospects of Metformin against Pseudomonas aeruginosa: A new dimension to a multifaceted drug. Microb Pathog 2023; 183:106281. [PMID: 37541553 DOI: 10.1016/j.micpath.2023.106281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/29/2023] [Accepted: 07/31/2023] [Indexed: 08/06/2023]
Abstract
Metformin (MeT) is an FDA-approved drug with a myriad of health benefits. Besides being used as an anti-diabetic drug, MeT is also effective against various cancers, liver-, cardiovascular-, and renal diseases. This study was undertaken to examine its unique potential as an anti-virulence drug against an opportunistic bacterial pathogen, Pseudomonas aeruginosa. Due to the menace of multidrug resistance in pathogenic microorganisms, many novel or repurposed drugs with anti-virulence prospects are emerging as next-generation therapies with the aim to overshadow the application of existing antimicrobial regimens. The quorum sensing (QS) mechanisms of P. aeruginosa are an attractive drug target for attenuating bacterial virulence. In this context, the anti-QS potential of MeT was scrutinized using biosensor assays. MeT was comprehensively evaluated for its effects on different motility phenotypes, virulence factor production (phenotypic and genotypic expression) along with biofilm development in P. aeruginosa in vitro. At sub-lethal concentrations, MeT displayed prolific quorum quenching (QQ) ability and remarkably inhibited AHL biosynthesis in P. aeruginosa. Moreover, MeT (1/8 MIC) effectively downregulated the expression levels of various QS- and virulence genes in P. aeruginosa, which coincided with a notable reduction in the levels of alginate, hemolysin, pyocyanin, pyochelin, elastase, and protease production. In silico analysis through molecular docking also predicted strong associations between MeT and QS receptors of P. aeruginosa. MeT also compromised the motility phenotypes and successfully abrogated biofilm formation by inhibiting EPS production in P. aeruginosa. Hence, MeT may be repurposed as an anti-virulence drug against P. aeruginosa in clinical settings.
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Affiliation(s)
- Jatin Chadha
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Lavanya Khullar
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Pallavi Gulati
- Department of Microbiology, University of Delhi South Campus, New Delhi, India
| | - Sanjay Chhibber
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Kusum Harjai
- Department of Microbiology, Panjab University, Chandigarh, India.
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