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Wong MY, Lin BS, Hu PS, Huang TY, Huang YK. Nanoparticles of Cs 0.33WO 3 as Antibiofilm Agents and Photothermal Treatment to Inhibit Biofilm Formation. ACS OMEGA 2024; 9:28144-28154. [PMID: 38973863 PMCID: PMC11223238 DOI: 10.1021/acsomega.4c01212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 06/04/2024] [Accepted: 06/07/2024] [Indexed: 07/09/2024]
Abstract
Metal oxide nanoparticles with photothermal properties have attracted considerable research attention for their use in biomedical applications. Cesium tungsten oxide (Cs0.33WO3) nanoparticles (NPs) exhibit strong absorption in the NIR region due to localized surface plasmon resonance, through which they convert light to heat; hence, they can be applied to photothermal treatment for bacteria and biofilm ablation. Herein, Cs0.33WO3 NPs were synthesized through solid-phase synthesis, and their physical properties were characterized through Zetasizer, energy dispersive X-ray spectroscopy, Fourier transform infrared spectrometer, and scanning and transmission electron microscopy (SEM and TEM, respectively). Burkholderia cenocepacia isolates were cultured in tryptic soy broth supplemented with glucose, and the biofilm inhibition and antibiofilm effects of the NPs were determined using a crystal violet assay and the Cell Counting Kit-8 (CCK-8) assay. The biofilm morphology and viability of NP-treated cultures after NIR irradiation were evaluated through SEM and confocal microscopy, respectively. The cytotoxicity of NPs to human macrophages was also assessed using the CCK-8 assay. The NPs effectively inhibited biofilm formation, with a formation rate of <10% and a viability rate of <50% at the concentration of ≥200 μg/mL. The confocal analysis revealed that NIR irradiation markedly enhanced biofilm cytotoxicity after treatment with the NPs. The assay of cytotoxicity to human macrophages demonstrated the biocompatibility of the NPs and NIR irradiation. In sum, the Cs0.33WO3 NPs displayed effective biofilm inhibition and antibiofilm activity at 200 μg/mL treatment concentration; they exhibited an enhancement effect under the NIR irradiation, suggesting Cs0.33WO3 NPs are a potential candidate agent for NIR-irradiated photothermal treatment in bacterial biofilm inhibition and antibiofilm.
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Affiliation(s)
- Min Yi Wong
- Division
of Thoracic and Cardiovascular Surgery, Chiayi Chang Gung Memorial Hospital, Puzi City, Chiayi County 61363, Taiwan
- College
of Photonics, National Yang Ming Chiao Tung
University, Tainan
City 71150, Taiwan
| | - Bor-Shyh Lin
- College
of Photonics, National Yang Ming Chiao Tung
University, Tainan
City 71150, Taiwan
| | - Po-Sheng Hu
- College
of Photonics, National Yang Ming Chiao Tung
University, Tainan
City 71150, Taiwan
| | - Tsung-Yu Huang
- Division
of Infectious Diseases, Department of Internal Medicine, Chiayi Chang Gung Memorial Hospital, Puzi City, Chiayi County 61363, Taiwan
- College
of Medicine, Chang Gung University, Taoyuan City 33302, Taiwan
| | - Yao-Kuang Huang
- Division
of Thoracic and Cardiovascular Surgery, Chiayi Chang Gung Memorial Hospital, Puzi City, Chiayi County 61363, Taiwan
- College
of Medicine, Chang Gung University, Taoyuan City 33302, Taiwan
- Division
of Thoracic and Cardiovascular Surgery, Chiayi Hospital, MOHW, Chiayi
City 60096, Taiwan
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2
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Alav I, Pordelkhaki P, de Resende PE, Partington H, Gibbons S, Lord RM, Buckner MMC. Cobalt complexes modulate plasmid conjugation in Escherichia coli and Klebsiella pneumoniae. Sci Rep 2024; 14:8103. [PMID: 38582880 PMCID: PMC10998897 DOI: 10.1038/s41598-024-58895-x] [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: 01/11/2024] [Accepted: 04/04/2024] [Indexed: 04/08/2024] Open
Abstract
Antimicrobial resistance genes (ARG), such as extended-spectrum β-lactamase (ESBL) and carbapenemase genes, are commonly carried on plasmids. Plasmids can transmit between bacteria, disseminate globally, and cause clinically important resistance. Therefore, targeting plasmids could reduce ARG prevalence, and restore the efficacy of existing antibiotics. Cobalt complexes possess diverse biological activities, including antimicrobial and anticancer properties. However, their effect on plasmid conjugation has not been explored yet. Here, we assessed the effect of four previously characterised bis(N-picolinamido)cobalt(II) complexes lacking antibacterial activity on plasmid conjugation in Escherichia coli and Klebsiella pneumoniae. Antimicrobial susceptibility testing of these cobalt complexes confirmed the lack of antibacterial activity in E. coli and K. pneumoniae. Liquid broth and solid agar conjugation assays were used to screen the activity of the complexes on four archetypical plasmids in E. coli J53. The cobalt complexes significantly reduced the conjugation of RP4, R6K, and R388 plasmids, but not pKM101, on solid agar in E. coli J53. Owing to their promising activity, the impact of cobalt complexes was tested on the conjugation of fluorescently tagged extended-spectrum β-lactamase encoding pCTgfp plasmid in E. coli and carbapenemase encoding pKpQILgfp plasmid in K. pneumoniae, using flow cytometry. The complexes significantly reduced the conjugation of pKpQILgfp in K. pneumoniae but had no impact on pCTgfp conjugation in E. coli. The cobalt complexes did not have plasmid-curing activity, suggesting that they target conjugation rather than plasmid stability. To our knowledge, this is the first study to report reduced conjugation of clinically relevant plasmids with cobalt complexes. These cobalt complexes are not cytotoxic towards mammalian cells and are not antibacterial, therefore they could be optimised and employed as inhibitors of plasmid conjugation.
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Affiliation(s)
- Ilyas Alav
- Institute of Microbiology and Infection, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
| | - Parisa Pordelkhaki
- Institute of Microbiology and Infection, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
| | - Pedro Ernesto de Resende
- School of Pharmacy, Faculty of Science, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Hannah Partington
- Institute of Microbiology and Infection, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
| | - Simon Gibbons
- Natural & Medical Sciences Research Center, University of Nizwa, Birkat Al Mauz, P.O. Box 33, Nizwa, 616, Oman
| | - Rianne M Lord
- School of Chemistry, Faculty of Science, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Michelle M C Buckner
- Institute of Microbiology and Infection, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15 2TT, UK.
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3
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Shi B, Li YR, Xu J, Zou J, Zhou Z, Jia Q, Jiang HB, Liu K. Advances in amelioration of plasma electrolytic oxidation coatings on biodegradable magnesium and alloys. Heliyon 2024; 10:e24348. [PMID: 38434039 PMCID: PMC10906185 DOI: 10.1016/j.heliyon.2024.e24348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 12/04/2023] [Accepted: 01/08/2024] [Indexed: 03/05/2024] Open
Abstract
Magnesium and its alloys are considered excellent materials for biodegradable implants because of their good biocompatibility and biodegradability as well as their mechanical properties. However, the rapid degradation rate severely limits their clinical applications. Plasma electrolytic oxidation (PEO), also known as micro-arc oxidation (MAO), is an effective surface modification technique. However, there are many pores and cracks on the coating surface under conventional PEO process. The corrosive products tend to penetrate deeply into the substrate, reducing its corrosion resistance and the biocompatibility, which makes PEO-coated Mg difficult to meet the long-term needs of in vivo implants. Hence, it is necessary to modify the PEO coating. This review discusses the formation mechanism and the influential parameters of PEO coatings on Mg. This is followed by a review of the latest research of the pretreatment and typical amelioration of PEO coating on biodegradable Mg alloys in the past 5 years, including calcium phosphate (Ca-P) coating, layered double hydroxide (LDH)-PEO coating, ZrO2 incorporated-PEO coating, antibacterial ingredients-PEO coating, drug-PEO coating, polymer-PEO composite coating, Plasma electrolytic fluorination (PEF) coating and self-healing coating. Meanwhile, the improvements of morphology, corrosion resistance, wear resistance, biocompatibility, antibacterial abilities, and drug loading abilities and the preparation methods of the modified PEO coatings are deeply discussed as well. Finally, the challenges and prospects of PEO coatings are discussed in detail for the purpose of promoting the clinical application of biodegradable Mg alloys.
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Affiliation(s)
- Biying Shi
- The CONVERSATIONALIST Club & Department of Stomatological Technology, School of Stomatology, Shandong First Medical University, Jinan 250117, Shandong, China
| | - Yu Ru Li
- The CONVERSATIONALIST Club & Department of Stomatological Technology, School of Stomatology, Shandong First Medical University, Jinan 250117, Shandong, China
| | - Jiaqi Xu
- The CONVERSATIONALIST Club & Department of Stomatological Technology, School of Stomatology, Shandong First Medical University, Jinan 250117, Shandong, China
| | - Jiawei Zou
- The CONVERSATIONALIST Club & Department of Stomatological Technology, School of Stomatology, Shandong First Medical University, Jinan 250117, Shandong, China
| | - Zili Zhou
- The CONVERSATIONALIST Club & Department of Stomatological Technology, School of Stomatology, Shandong First Medical University, Jinan 250117, Shandong, China
| | - Qi Jia
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
| | - Heng Bo Jiang
- The CONVERSATIONALIST Club & Department of Stomatological Technology, School of Stomatology, Shandong First Medical University, Jinan 250117, Shandong, China
| | - Kai Liu
- The CONVERSATIONALIST Club & Department of Stomatological Technology, School of Stomatology, Shandong First Medical University, Jinan 250117, Shandong, China
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4
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Hansson A, Karlsen EA, Stensen W, Svendsen JSM, Berglin M, Lundgren A. Preventing E. coli Biofilm Formation with Antimicrobial Peptide-Functionalized Surface Coatings: Recognizing the Dependence on the Bacterial Binding Mode Using Live-Cell Microscopy. ACS APPLIED MATERIALS & INTERFACES 2024; 16:6799-6812. [PMID: 38294883 PMCID: PMC10875647 DOI: 10.1021/acsami.3c16004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/16/2024] [Accepted: 01/18/2024] [Indexed: 02/02/2024]
Abstract
Antimicrobial peptides (AMPs) can kill bacteria by destabilizing their membranes, yet translating these molecules' properties into a covalently attached antibacterial coating is challenging. Rational design efforts are obstructed by the fact that standard microbiology methods are ill-designed for the evaluation of coatings, disclosing few details about why grafted AMPs function or do not function. It is particularly difficult to distinguish the influence of the AMP's molecular structure from other factors controlling the total exposure, including which type of bonds are formed between bacteria and the coating and how persistent these contacts are. Here, we combine label-free live-cell microscopy, microfluidics, and automated image analysis to study the response of surface-bound Escherichia coli challenged by the same small AMP either in solution or grafted to the surface through click chemistry. Initially after binding, the grafted AMPs inhibited bacterial growth more efficiently than did AMPs in solution. Yet, after 1 h, E. coli on the coated surfaces increased their expression of type-1 fimbriae, leading to a change in their binding mode, which diminished the coating's impact. The wealth of information obtained from continuously monitoring the growth, shape, and movements of single bacterial cells allowed us to elucidate and quantify the different factors determining the antibacterial efficacy of the grafted AMPs. We expect this approach to aid the design of elaborate antibacterial material coatings working by specific and selective actions, not limited to contact-killing. This technology is needed to support health care and food production in the postantibiotic era.
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Affiliation(s)
- Adam Hansson
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg 40530, Sweden
- Department
of Chemistry and Materials, RISE Research
Institutes of Sweden, Borås 50115, Sweden
| | - Eskil André Karlsen
- Amicoat
A/S, Sykehusvegen 23, Tromsø 9019, Norway
- Department
of Chemistry, UiT The Arctic University
of Norway, Tromsø 9037, Norway
| | - Wenche Stensen
- Department
of Chemistry, UiT The Arctic University
of Norway, Tromsø 9037, Norway
| | - John S. M. Svendsen
- Amicoat
A/S, Sykehusvegen 23, Tromsø 9019, Norway
- Department
of Chemistry, UiT The Arctic University
of Norway, Tromsø 9037, Norway
| | - Mattias Berglin
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg 40530, Sweden
- Department
of Chemistry and Materials, RISE Research
Institutes of Sweden, Borås 50115, Sweden
| | - Anders Lundgren
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg 40530, Sweden
- Centre
for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg 41346, Sweden
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5
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Rosales AB, Causserand C, Coetsier C, Formosa-Dague C. Probing the reduction of adhesion forces between biofilms and anti-biofouling filtration membrane surfaces using FluidFM technology. Colloids Surf B Biointerfaces 2024; 234:113701. [PMID: 38101142 DOI: 10.1016/j.colsurfb.2023.113701] [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: 10/26/2023] [Revised: 12/04/2023] [Accepted: 12/05/2023] [Indexed: 12/17/2023]
Abstract
Biofouling is a persistent problem in many sectors (healthcare, medicine, marine, and membrane filtration processes). To control the biofouling of surfaces, it is essential to overcome or reduce the adhesion forces between biofilms and surfaces. To access and understand the molecular basis of these interactions, atomic force microscopy (AFM) is a well-suited technology that can measure adhesion forces at the piconewton level. However, AFM-based existing methods only probe interactions between individual cells and surfaces, which is not representative of realistic conditions given that bacteria mainly exist in biofilms. We develop here an original method using FluidFM, a combination of AFM and microfluidics, to probe the adhesion forces between biofilms and filtration membranes modified with an anti-biofouling agent, vanillin. This strategy involves i) growing bacterial biofilms on micrometer-sized polystyrene beads, ii) aspirating these biofilm beads at the aperture of microfluidic cantilevers and iii) using them as probes in force spectroscopy experiments. The results obtained first showed that COOH-functionalized polystyrene beads are more suitable for bacterial growth, and that biofilms obtained after 3 h of incubation could be used with FluidFM. Then, biofilm-scale force spectroscopy experiments showed a significant decrease in adhesion forces, adhesion work, and adhesion events after membrane modification, demonstrating the potential of vanillin-coated membranes to reduce biofouling. In addition, the comparison between results at the individual cell and biofilm scales highlighted the complexity of polymeric matrix unbinding and/or unfolding in the biofilm, showing that individual cells behave differently from biofilms. Overall, this method could have implications in the fields of materials science, chemical engineering, health, and the environment.
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Affiliation(s)
- Abigail Burato Rosales
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, 31062 Toulouse, France
| | - Christel Causserand
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, 31062 Toulouse, France
| | - Clémence Coetsier
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, 31062 Toulouse, France; Fédération de Recherche Fermat, CNRS, 31000 Toulouse, France.
| | - Cécile Formosa-Dague
- TBI, Université de Toulouse, INSA, INRAE, CNRS, 31400 Toulouse, France; Fédération de Recherche Fermat, CNRS, 31000 Toulouse, France.
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6
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Gunathilaka GADKK, Dewasmika WAPM, Sandaruwan UM, Neelawala NGDAK, Madhumali GED, Dissanayake BN, Priyantha MAR, Prasada DVP, Dissanayake DRA. Biofilm-forming ability, antibiotic resistance and phylogeny of Escherichia coli isolated from extra intestinal infections of humans, dogs, and chickens. Comp Immunol Microbiol Infect Dis 2024; 105:102123. [PMID: 38217950 DOI: 10.1016/j.cimid.2023.102123] [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: 08/27/2023] [Revised: 12/29/2023] [Accepted: 12/30/2023] [Indexed: 01/15/2024]
Abstract
Escherichia coli (E. coli) causes various infections in humans and animals. The biofilm-forming ability of E. coli has increased antimicrobial resistance and capacity to cause recurrent and chronic infections. This study determined the biofilm-forming ability of E. coli isolated from extraintestinal infections of humans, chickens, and dogs in relation to the phylogroup, type of infection, and antibiotic resistance. Isolates from chickens showed significantly higher biofilm-forming ability compared to those causing urinary tract infections in humans (p = 0.0001). Further, isolates belonging to phylogroup B1 displayed a higher likelihood to form biofilms. Resistance to ciprofloxacin and trimethoprim-sulfamethoxazole was positively correlated with biofilm-forming ability. Harbouring plasmid-mediated quinolone resistance gene, qnrS was also positively correlated with biofilm formation. This study provides insight into factors such as phylogroup and the type of infections that could enhance biofilm formation, as well as genotypic and phenotypic antibiotic resistance that could correlate with the ability to form biofilms.
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Affiliation(s)
- G A D K K Gunathilaka
- Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Peradeniya, Sri Lanka
| | - W A P M Dewasmika
- Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Peradeniya, Sri Lanka
| | - U M Sandaruwan
- Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Peradeniya, Sri Lanka
| | - N G D A K Neelawala
- Department of Basic Sciences, Faculty of Allied Health Science, University of Peradeniya, Peradeniya, Sri Lanka
| | - G E D Madhumali
- Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Peradeniya, Sri Lanka
| | - B N Dissanayake
- Department of Microbiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
| | | | - D V P Prasada
- Faculty of Agriculture, University of Peradeniya, Peradeniya, Sri Lanka
| | - D R A Dissanayake
- Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Peradeniya, Sri Lanka.
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7
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Bhattacharya M, Horswill AR. The role of human extracellular matrix proteins in defining Staphylococcus aureus biofilm infections. FEMS Microbiol Rev 2024; 48:fuae002. [PMID: 38337187 PMCID: PMC10873506 DOI: 10.1093/femsre/fuae002] [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: 07/19/2023] [Revised: 01/26/2024] [Accepted: 02/07/2024] [Indexed: 02/12/2024] Open
Abstract
Twenty to forty one percent of the world's population is either transiently or permanently colonized by the Gram-positive bacterium, Staphylococcus aureus. In 2017, the CDC designated methicillin-resistant S. aureus (MRSA) as a serious threat, reporting ∼300 000 cases of MRSA-associated hospitalizations annually, resulting in over 19 000 deaths, surpassing that of HIV in the USA. S. aureus is a proficient biofilm-forming organism that rapidly acquires resistance to antibiotics, most commonly methicillin (MRSA). This review focuses on a large group of (>30) S. aureus adhesins, either surface-associated or secreted that are designed to specifically bind to 15 or more of the proteins that form key components of the human extracellular matrix (hECM). Importantly, this includes hECM proteins that are pivotal to the homeostasis of almost every tissue environment [collagen (skin), proteoglycans (lung), hemoglobin (blood), elastin, laminin, fibrinogen, fibronectin, and fibrin (multiple organs)]. These adhesins offer S. aureus the potential to establish an infection in every sterile tissue niche. These infections often endure repeated immune onslaught, developing into chronic, biofilm-associated conditions that are tolerant to ∼1000 times the clinically prescribed dose of antibiotics. Depending on the infection and the immune response, this allows S. aureus to seamlessly transition from colonizer to pathogen by subtly manipulating the host against itself while providing the time and stealth that it requires to establish and persist as a biofilm. This is a comprehensive discussion of the interaction between S. aureus biofilms and the hECM. We provide particular focus on the role of these interactions in pathogenesis and, consequently, the clinical implications for the prevention and treatment of S. aureus biofilm infections.
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Affiliation(s)
- Mohini Bhattacharya
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO 80045, United States
| | - Alexander R Horswill
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO 80045, United States
- Department of Veterans Affairs, Eastern Colorado Health Care System, Aurora, CO 80045, United States
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8
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Vuotto C, Donelli G, Buckley A, Chilton C. Clostridioides difficile Biofilm. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1435:249-272. [PMID: 38175479 DOI: 10.1007/978-3-031-42108-2_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Clostridioides difficile infection (CDI), previously Clostridium difficile infection, is a symptomatic infection of the large intestine caused by the spore-forming anaerobic, gram-positive bacterium Clostridioides difficile. CDI is an important healthcare-associated disease worldwide, characterized by high levels of recurrence, morbidity, and mortality. CDI is observed at a higher rate in immunocompromised patients after antimicrobial therapy, with antibiotics disrupting the commensal microbiota and promoting C. difficile colonization of the gastrointestinal tract.A rise in clinical isolates resistant to multiple antibiotics and the reduced susceptibility to the most commonly used antibiotic molecules have made the treatment of CDI more complicated, allowing the persistence of C. difficile in the intestinal environment.Gut colonization and biofilm formation have been suggested to contribute to the pathogenesis and persistence of C. difficile. In fact, biofilm growth is considered as a serious threat because of the related antimicrobial tolerance that makes antibiotic therapy often ineffective. This is the reason why the involvement of C. difficile biofilm in the pathogenesis and recurrence of CDI is attracting more and more interest, and the mechanisms underlying biofilm formation of C. difficile as well as the role of biofilm in CDI are increasingly being studied by researchers in the field.Findings on C. difficile biofilm, possible implications in CDI pathogenesis and treatment, efficacy of currently available antibiotics in treating biofilm-forming C. difficile strains, and some antimicrobial alternatives under investigation will be discussed here.
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Affiliation(s)
- Claudia Vuotto
- Microbial Biofilm Laboratory, IRCCS Fondazione Santa Lucia, Rome, Italy.
| | | | - Anthony Buckley
- Microbiome and Nutritional Sciences Group, School of Food Science & Nutrition, University of Leeds, Leeds, UK
| | - Caroline Chilton
- Healthcare Associated Infection Research Group, Section of Molecular Gastroenterology, Leeds Institute for Medical Research at St James, University of Leeds, Leeds, UK
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9
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Crisp AR, Short B, Rowan L, Ramage G, Rehman IU, Short RD, Williams C. Investigating the chemical pathway to the formation of a single biofilm using infrared spectroscopy. Biofilm 2023; 6:100141. [PMID: 37449091 PMCID: PMC10336410 DOI: 10.1016/j.bioflm.2023.100141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 06/02/2023] [Accepted: 06/30/2023] [Indexed: 07/18/2023] Open
Abstract
Diagnosing biofilm infections has remained a constant challenge for the last 50 years. Existing diagnostic methods struggle to identify the biofilm phenotype. Moreover, most methods of biofilm analysis destroy the biofilm making the resultant data interpretation difficult. In this study we introduce Fourier Transform Infra-Red (FTIR) spectroscopy as a label-free, non-destructive approach to monitoring biofilm progression. We have utilised FTIR in a novel application to evaluate the chemical composition of bacterial biofilms without disrupting the biofilm architecture. S. epidermidis (RP62A) was grown onto calcium fluoride slides for periods of 30 min-96 h, before semi-drying samples for analysis. We report the discovery of a chemical marker to distinguish between planktonic and biofilm samples. The appearance of new proteins in biofilm samples of varying maturity is exemplified in the spectroscopic data, highlighting the potential of FTIR for identifying the presence and developmental stage of a single biofilm.
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Affiliation(s)
- Amy R. Crisp
- Engineering Department, Lancaster University, Bailrigg, Lancaster, LA1 4YW, UK
| | - Bryn Short
- School of Medicine, Dentistry and Nursing, MVLS, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Laurence Rowan
- School of Medicine, Dentistry and Nursing, MVLS, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Gordon Ramage
- School of Medicine, Dentistry and Nursing, MVLS, University of Glasgow, Glasgow, G12 8QQ, UK
| | | | - Robert D. Short
- Department of Chemistry, The University of Sheffield, Brook Hill, Sheffield, S3 7HF, UK
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10
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Stevenson P, Marguet M, Regulski M. Biofilm and Hospital-Acquired Infections in Older Adults. Crit Care Nurs Clin North Am 2023; 35:375-391. [PMID: 37838413 DOI: 10.1016/j.cnc.2023.05.007] [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] [Indexed: 10/16/2023]
Abstract
Biofilm infections are a serious threat to public health, resistant to traditional treatments and host immune defenses. Biofilm infections are often polymicrobial, related to chronic wounds, medical devices (eg, knee replacements, catheters, tubes, contact lenses, or prosthetic valves) and chronic recurring diseases. Biofilms are more complex than nonadhered planktonic bacteria and produce a structure that prevents damage to the bacteria within the biofilm structure. The structure provides a hidden route to feed and nurture the bacteria allowing for ongoing spread of the bacteria.
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Affiliation(s)
- Patricia Stevenson
- Next Science™ LLC, 10550 Deerwood Park Boulevard, Suite 300, Jacksonville, FL 32256, USA.
| | - Melissa Marguet
- Next Science™ LLC, 10550 Deerwood Park Boulevard, Suite 300, Jacksonville, FL 32256, USA
| | - Matthew Regulski
- Next Science™ LLC, 10550 Deerwood Park Boulevard, Suite 300, Jacksonville, FL 32256, USA; The Wound Institute of Ocean County, 54 Bey Lea Road Tom's River, NJ 08759, USA
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11
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Colilla M, Vallet-Regí M. Organically Modified Mesoporous Silica Nanoparticles against Bacterial Resistance. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:8788-8805. [PMID: 38027542 PMCID: PMC10653088 DOI: 10.1021/acs.chemmater.3c02192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/22/2023] [Indexed: 12/01/2023]
Abstract
Bacterial antimicrobial resistance is posed to become a major hazard to global health in the 21st century. An aggravating issue is the stalled antibiotic research pipeline, which requires the development of new therapeutic strategies to combat antibiotic-resistant infections. Nanotechnology has entered into this scenario bringing up the opportunity to use nanocarriers capable of transporting and delivering antimicrobials to the target site, overcoming bacterial resistant barriers. Among them, mesoporous silica nanoparticles (MSNs) are receiving growing attention due to their unique features, including large drug loading capacity, biocompatibility, tunable pore sizes and volumes, and functionalizable silanol-rich surface. This perspective article outlines the recent research advances in the design and development of organically modified MSNs to fight bacterial infections. First, a brief introduction to the different mechanisms of bacterial resistance is presented. Then, we review the recent scientific approaches to engineer multifunctional MSNs conceived as an assembly of inorganic and organic building blocks, against bacterial resistance. These elements include specific ligands to target planktonic bacteria, intracellular bacteria, or bacterial biofilm; stimuli-responsive entities to prevent antimicrobial cargo release before arriving at the target; imaging agents for diagnosis; additional constituents for synergistic combination antimicrobial therapies; and aims to improve the therapeutic outcomes. Finally, this manuscript addresses the current challenges and future perspectives on this hot research area.
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Affiliation(s)
- Montserrat Colilla
- Departamento
de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, Instituto de Investigación
Sanitaria Hospital 12 de Octubre i+12, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
- Centro
de Investigación Biomédica en Red de Bioingeniería,
Biomateriales y Nanomedicina (CIBER-BBN), Madrid 28029, Spain
| | - María Vallet-Regí
- Departamento
de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, Instituto de Investigación
Sanitaria Hospital 12 de Octubre i+12, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
- Centro
de Investigación Biomédica en Red de Bioingeniería,
Biomateriales y Nanomedicina (CIBER-BBN), Madrid 28029, Spain
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12
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Ghalayani Esfahani A, Sartori M, Bregoli C, Fiocchi J, Biffi CA, Tuissi A, Giavaresi G, Presentato A, Alduina R, De Luca A, Cabrini A, De Capitani C, Fini M, Gruppioni E, Lavorgna M, Ronca A. Bactericidal Activity of Silver-Doped Chitosan Coatings via Electrophoretic Deposition on Ti 6Al 4V Additively Manufactured Substrates. Polymers (Basel) 2023; 15:4130. [PMID: 37896373 PMCID: PMC10610813 DOI: 10.3390/polym15204130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 10/13/2023] [Accepted: 10/15/2023] [Indexed: 10/29/2023] Open
Abstract
Prosthetic reconstruction can serve as a feasible alternative, delivering both functional and aesthetic benefits to individuals with hand and finger injuries, frequent causes of emergency room visits. Implant-related infections pose significant challenges in arthroplasty and osteosynthesis procedures, contributing to surgical failures. As a potential solution to this challenge, this study developed a new class of silver (Ag)-doped chitosan (CS) coatings via electrophoretic deposition (EPD) on osseointegrated prostheses for infection therapy. These coatings were successfully applied to additively manufactured Ti6Al4V ELI samples. In the initial phase, the feasibility of the composite coating was assessed using the Thermogravimetric Analysis (TGA) and Attenuated Total Reflection (ATR) techniques. The optimized structures exhibited impressive water uptake in the range of 300-360%. Codeposition with an antibacterial agent proved effective, and scanning electron microscopy (SEM) was used to examine the coating morphology. Biologically, CS coatings demonstrated cytocompatibility when in direct contact with a fibroblast cell line (L929) after 72 h. When exposed to the Staphylococcus epidermidis strain (ATCC 12228), these coatings inhibited bacterial growth and biofilm formation within 24 h. These findings underscore the significant potential of this approach for various applications, including endoprostheses like hip implants, internal medical devices, and transcutaneous prostheses such as osseointegrated limb prosthetics for upper and lower extremities.
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Affiliation(s)
- Arash Ghalayani Esfahani
- Institute for Polymers, Composites and Biomaterials (IPCB), National Research Council (Consiglio Nazionale delle Ricerche) (CNR), Via Gaetano Previati, 1/E, 23900 Lecco, Italy; (A.C.); (C.D.C.); (M.L.); (A.R.)
| | - Maria Sartori
- Surgical Sciences and Technologies, IRCCS Istituto Ortopedico Rizzoli, Via Di Barbiano, 1/10, 40136 Bologna, Italy; (M.S.); (G.G.); (A.D.L.)
| | - Chiara Bregoli
- Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), National Research Council (Consiglio Nazionale delle Ricerche) (CNR), Via Gaetano Previati, 1/E, 23900 Lecco, Italy; (C.B.); (J.F.); (C.A.B.); (A.T.)
| | - Jacopo Fiocchi
- Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), National Research Council (Consiglio Nazionale delle Ricerche) (CNR), Via Gaetano Previati, 1/E, 23900 Lecco, Italy; (C.B.); (J.F.); (C.A.B.); (A.T.)
| | - Carlo Alberto Biffi
- Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), National Research Council (Consiglio Nazionale delle Ricerche) (CNR), Via Gaetano Previati, 1/E, 23900 Lecco, Italy; (C.B.); (J.F.); (C.A.B.); (A.T.)
| | - Ausonio Tuissi
- Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), National Research Council (Consiglio Nazionale delle Ricerche) (CNR), Via Gaetano Previati, 1/E, 23900 Lecco, Italy; (C.B.); (J.F.); (C.A.B.); (A.T.)
| | - Gianluca Giavaresi
- Surgical Sciences and Technologies, IRCCS Istituto Ortopedico Rizzoli, Via Di Barbiano, 1/10, 40136 Bologna, Italy; (M.S.); (G.G.); (A.D.L.)
| | - Alessandro Presentato
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Viale delle Scienze, Bd. 16, 90128 Palermo, Italy; (A.P.); (R.A.)
| | - Rosa Alduina
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Viale delle Scienze, Bd. 16, 90128 Palermo, Italy; (A.P.); (R.A.)
| | - Angela De Luca
- Surgical Sciences and Technologies, IRCCS Istituto Ortopedico Rizzoli, Via Di Barbiano, 1/10, 40136 Bologna, Italy; (M.S.); (G.G.); (A.D.L.)
| | - Alessia Cabrini
- Institute for Polymers, Composites and Biomaterials (IPCB), National Research Council (Consiglio Nazionale delle Ricerche) (CNR), Via Gaetano Previati, 1/E, 23900 Lecco, Italy; (A.C.); (C.D.C.); (M.L.); (A.R.)
| | - Cristina De Capitani
- Institute for Polymers, Composites and Biomaterials (IPCB), National Research Council (Consiglio Nazionale delle Ricerche) (CNR), Via Gaetano Previati, 1/E, 23900 Lecco, Italy; (A.C.); (C.D.C.); (M.L.); (A.R.)
| | - Milena Fini
- Scientific Directorate, IRCCS Istituto Ortopedico Rizzoli, Via Di Barbiano, 1/10, 40136 Bologna, Italy;
| | - Emanuele Gruppioni
- INAIL Centro Protesi, Via Rabuina 14, Vigorso di Budrio, 40054 Bologna, Italy;
| | - Marino Lavorgna
- Institute for Polymers, Composites and Biomaterials (IPCB), National Research Council (Consiglio Nazionale delle Ricerche) (CNR), Via Gaetano Previati, 1/E, 23900 Lecco, Italy; (A.C.); (C.D.C.); (M.L.); (A.R.)
| | - Alfredo Ronca
- Institute for Polymers, Composites and Biomaterials (IPCB), National Research Council (Consiglio Nazionale delle Ricerche) (CNR), Via Gaetano Previati, 1/E, 23900 Lecco, Italy; (A.C.); (C.D.C.); (M.L.); (A.R.)
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13
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Wójtowicz D, Stodolak-Zych E. Strategies to Mitigate Biofouling of Nanocomposite Polymer-Based Membranes in Contact with Blood. MEMBRANES 2023; 13:762. [PMID: 37755184 PMCID: PMC10536434 DOI: 10.3390/membranes13090762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/21/2023] [Accepted: 08/25/2023] [Indexed: 09/28/2023]
Abstract
An extracorporeal blood purification method called continuous renal replacement therapy uses a porous hollow-fiber polymeric membrane that is exposed to prolonged contact with blood. In that condition, like with any other submerged filtration membrane, the hemofilter loses its properties over time and use resulting in a rapid decline in flux. The most significant reason for this loss is the formation of a biofilm. Protein, blood cells and bacterial cells attach to the membrane surface in complex and fluctuating processes. Anticoagulation allows for longer patency of vascular access and a longer lifespan of the membrane. Other preventive measures include the modification of the membrane itself. In this article, we focused on the role of nanoadditives in the mitigation of biofouling. Nanoparticles such as graphene, carbon nanotubes, and silica effectively change surface properties towards more hydrophilic, affect pore size and distribution, decrease protein adsorption and damage bacteria cells. As a result, membranes modified with nanoparticles show better flow parameters, longer lifespan and increased hemocompatibility.
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Affiliation(s)
- Dominika Wójtowicz
- Department of Biomaterials and Composites, Faculty of Materials Science and Ceramics, AGH University of Krakow, Al. Mickiewicza 30, 30-059 Krakow, Poland;
- Clinical Department of Anaesthesiology and Intensive Care, University Hospital in Krakow, ul. Jakubowskiego 2, 30-688 Krakow, Poland
| | - Ewa Stodolak-Zych
- Department of Biomaterials and Composites, Faculty of Materials Science and Ceramics, AGH University of Krakow, Al. Mickiewicza 30, 30-059 Krakow, Poland;
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14
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Maloney SE, Grayton QE, Wai C, Uriyanghai U, Sidhu J, Roy-Chaudhury P, Schoenfisch MH. Nitric Oxide-Releasing Hemodialysis Catheter Lock Solutions. ACS APPLIED MATERIALS & INTERFACES 2023; 15:28907-28921. [PMID: 37285144 DOI: 10.1021/acsami.3c02506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In an attempt to address the significant morbidity, mortality, and economic cost associated with tunneled dialysis catheter (TDC) dysfunction, we report the development of nitric oxide-releasing dialysis catheter lock solutions. Catheter lock solutions with a range of NO payloads and release kinetics were prepared using low-molecular-weight N-diazeniumdiolate nitric oxide donors. Nitric oxide released through the catheter surface as a dissolved gas was maintained at therapeutically relevant levels for at least 72 h, supporting clinical translatability (interdialytic period). Slow, sustained NO release from the catheter surface prevented bacterial adhesion in vitro by 88.9 and 99.7% for Pseudomonas aeruginosa and Staphylococcus epidermidis, respectively, outperforming a burst NO-release profile. Furthermore, bacteria adhered to the catheter surface in vitro prior to lock solution use was reduced by 98.7 and 99.2% for P. aeruginosa and S. epidermidis, respectively, when using a slow releasing NO donor, demonstrating both preventative and treatment potential. The adhesion of proteins to the catheter surface, a process often preceding biofilm formation and thrombosis, was also lessened by 60-65% by sustained NO release. In vitro cytotoxicity of catheter extract solutions to mammalian cells was minimal, supporting the non-toxic nature of the NO-releasing lock solutions. The use of the NO-releasing lock solution in an in vivo TDC porcine model demonstrated decreased infection and thrombosis, enhanced catheter functionality, and improved outcome (i.e., likelihood of survival) as a result of catheter use.
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Affiliation(s)
- Sara E Maloney
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Quincy E Grayton
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Christine Wai
- UNC Kidney Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Unimunkh Uriyanghai
- UNC Kidney Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Jasleen Sidhu
- UNC Kidney Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Prabir Roy-Chaudhury
- UNC Kidney Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Mark H Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
- Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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15
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Nassar R, Nassar M, Senok A, Williams D. Phytic Acid Demonstrates Rapid Antibiofilm Activity and Inhibits Biofilm Formation When Used as a Surface Conditioning Agent. Microbiol Spectr 2023; 11:e0026723. [PMID: 37191582 PMCID: PMC10269681 DOI: 10.1128/spectrum.00267-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 04/24/2023] [Indexed: 05/17/2023] Open
Abstract
Root canal infections are associated with biofilms and are treated with chemical irrigants with a high success rate. However, treatment failure does arise, which is attributed primarily to resistance exhibited by biofilms. Currently used irrigants in root canal treatment have disadvantages, and there is therefore a need for more biocompatible alternatives with antibiofilm properties to reduce root canal treatment failure and complications. The aim of this study was to evaluate the in vitro antibiofilm properties of phytic acid (IP6), which is a potential alternative treatment agent. Single- and dual-species biofilms of Enterococcus faecalis and Candida albicans were developed on the well surfaces of 12-well plates and on hydroxyapatite (HA) coupons, and then exposed to IP6. In addition, selected HA coupons were preconditioned with IP6 before biofilm development. IP6 demonstrated bactericidal effects and altered the metabolic activity of biofilm cells. Confocal laser-scanning microscopy showed that IP6 caused significant and rapid reduction in live biofilm cells. At sublethal concentrations, IP6 did not alter the expression of tested virulence genes except for C. albicans hwp1, the expression of which was upregulated but not reflected by a change in hyphal transformation. IP6-preconditioned HA coupons led to extensive inhibition of dual-species biofilm formation. The results of this study highlight for the first time the antibiofilm inhibitory properties of IP6 and the potential for its exploitation in several clinical applications. IMPORTANCE Root canal infections are biofilm associated, and despite mechanical and chemical treatment procedures, infection recurrence occurs, and this is likely due to the high tolerance of associated biofilms to antimicrobials. The currently used treatment agents have several disadvantages, which necessitates the search for new improved agents. In this study, the natural chemical phytic acid was found to exhibit antibiofilm activity against established mono and dual mature biofilms over a short contact time. Most importantly, phytic acid was found to cause significant inhibition of dual-species biofilm formation when used as a surface preconditioning agent. The findings of this study identified a novel use of phytic acid as a potential antibiofilm agent that can be used in several clinical applications.
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Affiliation(s)
- Rania Nassar
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, United Kingdom
| | - Mohannad Nassar
- Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - Abiola Senok
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
| | - David Williams
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, United Kingdom
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16
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Eskikaya O, Özdemir S, Gonca S, Dizge N, Balakrishnan D, Shaik F, Senthilkumar N. A comparative study of iron nanoflower and nanocube in terms of antibacterial properties. APPLIED NANOSCIENCE 2023; 13:1-13. [PMID: 37362150 PMCID: PMC10073798 DOI: 10.1007/s13204-023-02822-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 03/05/2023] [Indexed: 06/28/2023]
Abstract
It is known that heavy metal containing nanomaterials can easily prevent the formation of microbial cultures. The emergence of new generation epidemic diseases in the last 2 years has increased the importance of both personal and environmental hygiene. For this reason, in addition to preventing the spread of diseases, studies on alternative disinfectant substances are also carried out. In this study, the antibacterial activity of nanoflower and nanocube, which are easily synthesized and nanoparticle species containing iron, were compared. The antioxidant abilities of new synthesized NF@FeO(OH) and NC@α-Fe2O3 were tested by DPPH scavenging activity assay. The highest DPPH inhibition was achieved with NC@α-Fe2O3 as 71.30% at 200 mg/L. NF@FeO(OH) and NC@α-Fe2O3 demonstrated excellent DNA cleavage ability. The antimicrobial capabilities of NF@FeO(OH) and NC@α-Fe2O3 were analyzed with micro dilution procedure. In 500 mg/L, the antimicrobial activity was 100%. In addition to these, the biofilm inhibition of NF@FeO(OH) and NC@α-Fe2O3 were investigated against S. aureus and P. aeruginosa and it was found that they showed significant antibiofilm inhibition. It is suggested that additional studies can be continued to be developed and used as an antibacterial according to the results of the nanoparticles after various toxicological test systems. Supplementary Information The online version contains supplementary material available at 10.1007/s13204-023-02822-5.
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Affiliation(s)
- Ozan Eskikaya
- Department of Environmental Engineering, Mersin University, 33343 Mersin, Turkey
| | - Sadin Özdemir
- Technical Science Vocational School, Mersin University, Yenisehir, 33343 Mersin, Turkey
| | - Serpil Gonca
- Faculty of Pharmacy, University of Mersin, Turkey, Yenisehir, 33343 Mersin, Turkey
| | - Nadir Dizge
- Department of Environmental Engineering, Mersin University, 33343 Mersin, Turkey
| | - Deepanraj Balakrishnan
- College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar, 31952 Saudi Arabia
| | - Feroz Shaik
- College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar, 31952 Saudi Arabia
| | - Natarajan Senthilkumar
- Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602105 India
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17
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Pouget C, Chatre C, Lavigne JP, Pantel A, Reynes J, Dunyach-Remy C. Effect of Antibiotic Exposure on Staphylococcus epidermidis Responsible for Catheter-Related Bacteremia. Int J Mol Sci 2023; 24:ijms24021547. [PMID: 36675063 PMCID: PMC9863639 DOI: 10.3390/ijms24021547] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 12/16/2022] [Accepted: 01/09/2023] [Indexed: 01/15/2023] Open
Abstract
Coagulase-negative staphylococci (CoNS) and especially Staphylococcus epidermidis are responsible for health care infections, notably in the presence of foreign material (e.g., venous or central-line catheters). Catheter-related bacteremia (CRB) increases health care costs and mortality. The aim of our study was to evaluate the impact of 15 days of antibiotic exposure (ceftobiprole, daptomycin, linezolid and vancomycin) at sub-inhibitory concentration on the resistance, fitness and genome evolution of 36 clinical strains of S. epidermidis responsible for CRB. Resistance was evaluated by antibiogram, the ability to adapt metabolism by the Biofilm Ring test® and the in vivo nematode virulence model. The impact of antibiotic exposure was determined by whole-genome sequencing (WGS) and biofilm formation experiments. We observed that S. epidermidis strains presented a wide variety of virulence potential and biofilm formation. After antibiotic exposure, S. epidermidis strains adapted their fitness with an increase in biofilm formation. Antibiotic exposure also affected genes involved in resistance and was responsible for cross-resistance between vancomycin, daptomycin and ceftobiprole. Our data confirmed that antibiotic exposure modified bacterial pathogenicity and the emergence of resistant bacteria.
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Affiliation(s)
- Cassandra Pouget
- Department of Microbiology and Hospital Hygiene, Bacterial Virulence and Chronic Infections, INSERM U1047, CHU Nîmes Univiversity Montpellier, CEDEX 09, 30029 Nîmes, France
| | - Clotilde Chatre
- Department of Infectious and Tropical Diseases, CH Perpignan, 66000 Perpignan, France
| | - Jean-Philippe Lavigne
- Department of Microbiology and Hospital Hygiene, Bacterial Virulence and Chronic Infections, INSERM U1047, CHU Nîmes Univiversity Montpellier, CEDEX 09, 30029 Nîmes, France
| | - Alix Pantel
- Department of Microbiology and Hospital Hygiene, Bacterial Virulence and Chronic Infections, INSERM U1047, CHU Nîmes Univiversity Montpellier, CEDEX 09, 30029 Nîmes, France
| | - Jacques Reynes
- Department of Infectious and Tropical Diseases, IRD UMI 233, INSERM U1175, CHU Montpellier, University Montpellier, CEDEX 5, 34295 Montpellier, France
| | - Catherine Dunyach-Remy
- Department of Microbiology and Hospital Hygiene, Bacterial Virulence and Chronic Infections, INSERM U1047, CHU Nîmes Univiversity Montpellier, CEDEX 09, 30029 Nîmes, France
- Correspondence: ; Tel.: +33-4-6668-3202
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18
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Alipour S, Nour S, Attari SM, Mohajeri M, Kianersi S, Taromian F, Khalkhali M, Aninwene GE, Tayebi L. A review on in vitro/ in vivo response of additively manufactured Ti-6Al-4V alloy. J Mater Chem B 2022; 10:9479-9534. [PMID: 36305245 DOI: 10.1039/d2tb01616h] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Bone replacement using porous and solid metallic implants, such as Ti-alloy implants, is regarded as one of the most practical therapeutic approaches in biomedical engineering. The bone is a complex tissue with various mechanical properties based on the site of action. Patient-specific Ti-6Al-4V constructs may address the key needs in bone treatment for having customized implants that mimic the complex structure of the natural tissue and diminish the risk of implant failure. This review focuses on the most promising methods of fabricating such patient-specific Ti-6Al-4V implants using additive manufacturing (AM) with a specific emphasis on the popular subcategory, which is powder bed fusion (PBF). Characteristics of the ideal implant to promote optimized tissue-implant interactions, as well as physical, mechanical/chemical treatments and modifications will be discussed. Accordingly, such investigations will be classified into 3B-based approaches (Biofunctionality, Bioactivity, and Biostability), which mainly govern native body response and ultimately the success in implantation.
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Affiliation(s)
- Saeid Alipour
- Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA
| | - Shirin Nour
- Tissue Engineering Group, Department of Biomedical Engineering, University of Melbourne, VIC 3010, Australia.,Polymer Science Group, Department of Chemical Engineering, University of Melbourne, VIC 3010, Australia
| | - Seyyed Morteza Attari
- Department of Material Science and Engineering, University of Connecticut, Storrs, Connecticut, USA
| | - Mohammad Mohajeri
- Department of Biomedical Engineering, College of Engineering, Texas A&M University, TX, USA
| | - Sogol Kianersi
- CÚRAM, SFI Centre for Research in Medical Devices, Biomedical Sciences, University of Galway, Galway, Ireland
| | - Farzaneh Taromian
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Mohammadparsa Khalkhali
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - George E Aninwene
- Department of Bioengineering, Henry Samueli School of Engineering and Applied Sciences, University of California-Los Angeles, Los Angeles, California, USA.,Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, California, USA.,California NanoSystems Institute (CNSI), University of California-Los Angeles, Los Angeles, California, USA
| | - Lobat Tayebi
- School of Dentistry, Marquette University, Milwaukee, Wisconsin, USA.
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19
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Fallon M, Kennedy S, Daniels S, Humphreys H. Technologies to decontaminate bacterial biofilm on hospital surfaces: a potential new role for cold plasma? J Med Microbiol 2022; 71. [PMID: 36201343 DOI: 10.1099/jmm.0.001582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2022] Open
Abstract
Healthcare-associated infections (HCAIs) are a major challenge and the near patient surface is important in harbouring causes such as methicillin-resistant Staphylococcus aureus (MRSA) and Clostridioides difficile. Current approaches to decontamination are sub-optimal and many studies have demonstrated that microbial causes of HCAIs may persist with onward transmission. This may be due to the capacity of these microbes to survive in biofilms on surfaces. New technologies to enhance hospital decontamination may have a role in addressing this challenge. We have reviewed current technologies such as UV light and hydrogen peroxide and also assessed the potential use of cold atmospheric pressure plasma (CAPP) in surface decontamination. The antimicrobial mechanisms of CAPP are not fully understood but the production of reactive oxygen and other species is believed to be important. CAPP systems have been shown to partially or completely remove a variety of biofilms including those caused by Candida albicans, and multi-drug-resistant bacteria such as MRSA. There are some studies that suggest promise for CAPP in the challenge of surface decontamination in the healthcare setting. However, further work is required to define better the mechanism of action. We need to know what surfaces are most amenable to treatment, how microbial components and the maturity of biofilms may affect successful treatment, and how would CAPP be used in the clinical setting.
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Affiliation(s)
- Muireann Fallon
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital, Dublin, Ireland
| | - Sarah Kennedy
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital, Dublin, Ireland
| | - Stephen Daniels
- National Centre for Plasma Science and Technology, Dublin City University, Dublin, Ireland
| | - Hilary Humphreys
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital, Dublin, Ireland.,Department of Microbiology, Beaumont Hospital, Dublin, Ireland
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20
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Gill SP, Hunter WR, Coulson LE, Banat IM, Schelker J. Synthetic and biological surfactant effects on freshwater biofilm community composition and metabolic activity. Appl Microbiol Biotechnol 2022; 106:6847-6859. [PMID: 36121483 PMCID: PMC9529700 DOI: 10.1007/s00253-022-12179-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/02/2022] [Accepted: 09/08/2022] [Indexed: 11/06/2022]
Abstract
Abstract
Surfactants are used to control microbial biofilms in industrial and medical settings. Their known toxicity on aquatic biota, and their longevity in the environment, has encouraged research on biodegradable alternatives such as rhamnolipids. While previous research has investigated the effects of biological surfactants on single species biofilms, there remains a lack of information regarding the effects of synthetic and biological surfactants in freshwater ecosystems. We conducted a mesocosm experiment to test how the surfactant sodium dodecyl sulfate (SDS) and the biological surfactant rhamnolipid altered community composition and metabolic activity of freshwater biofilms. Biofilms were cultured in the flumes using lake water from Lake Lunz in Austria, under high (300 ppm) and low (150 ppm) concentrations of either surfactant over a four-week period. Our results show that both surfactants significantly affected microbial diversity. Up to 36% of microbial operational taxonomic units were lost after surfactant exposure. Rhamnolipid exposure also increased the production of the extracellular enzymes, leucine aminopeptidase, and glucosidase, while SDS exposure reduced leucine aminopeptidase and glucosidase. This study demonstrates that exposure of freshwater biofilms to chemical and biological surfactants caused a reduction of microbial diversity and changes in biofilm metabolism, exemplified by shifts in extracellular enzyme activities. Key points • Microbial biofilm diversity decreased significantly after surfactant exposure. • Exposure to either surfactant altered extracellular enzyme activity. • Overall metabolic activity was not altered, suggesting functional redundancy.
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Affiliation(s)
- Stephanie P Gill
- Department of Geography and Environmental Studies, Ulster University, Coleraine, BT52 1SA, N. Ireland, UK.
| | - William R Hunter
- Fisheries and Aquatic Ecosystems Branch, Agri-Food and Biosciences Institute, Belfast, N. Ireland, UK
| | - Laura E Coulson
- WasserCluster Lunz, Lunz am See, Austria.,Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Ibrahim M Banat
- School of Biomedical Sciences, Ulster University, Coleraine, N. Ireland, UK
| | - Jakob Schelker
- WasserCluster Lunz, Lunz am See, Austria.,Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
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21
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Kasthuri T, Swetha TK, Bhaskar JP, Pandian SK. Rapid-killing efficacy substantiates the antiseptic property of the synergistic combination of carvacrol and nerol against nosocomial pathogens. Arch Microbiol 2022; 204:590. [PMID: 36053368 PMCID: PMC9438373 DOI: 10.1007/s00203-022-03197-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/08/2022] [Accepted: 08/18/2022] [Indexed: 12/05/2022]
Abstract
Globally, new classes of synthetic and natural antibiotics and antivirulents have continuously been validated for their potential broad-spectrum antagonistic activity with the aim of identifying an effective active molecule to prevent the spread of infectious agents in both food industry and medical field. In view of this, present study is aimed at evaluating the rapid killing efficacy of bioactive molecules Carvacrol (C) and Nerol (N) through British Standard European Norm 1276: phase2/step1 (EN1276) protocol. Active molecules C and N showed broad-spectrum antimicrobial activity against the test strains Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Enterococcus hirae at concentration range of 78.125, 625, 156.25 and 312.5 μg/mL, respectively, for C, and 625 μg/mL for N. Whereas, combinatorial approach showed efficient activity with four times reduced concentration of C and N at 78.125 and 156.25 µg/mL, respectively, against test strains. Further, EN1276 results proved the rapid killing efficacy of test strains in 1 min of contact time with significant (> 5 log) growth reduction at 100X concentration of actives. SEM analysis and reduced concentration of protease, lipids and carbohydrate contents of treated group biofilm components ascertained preformed biofilm disruption potential of C + N on polystyrene and nail surfaces. C + N at synergistic concentration exhibited no adverse effect on HaCaT cells at 78.125 µg/mL (C) + 156.25 µg/mL (N). Taken together, based on the observed experimental results, present study evidence the antiseptic/disinfectant ability of C + N and suggest that the combination can preferentially be used in foam-based hand wash formulations.
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Affiliation(s)
- Thirupathi Kasthuri
- Department of Biotechnology, Science Campus, Alagappa University, Karaikudi, 630 003, Tamil Nadu, India
| | | | | | - Shunmugiah Karutha Pandian
- Department of Biotechnology, Science Campus, Alagappa University, Karaikudi, 630 003, Tamil Nadu, India.
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22
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Mulkern AJ, Oyama LB, Cookson AR, Creevey CJ, Wilkinson TJ, Olleik H, Maresca M, da Silva GC, Fontes PP, Bazzolli DMS, Mantovani HC, Damaris BF, Mur LAJ, Huws SA. Microbiome-derived antimicrobial peptides offer therapeutic solutions for the treatment of Pseudomonas aeruginosa infections. NPJ Biofilms Microbiomes 2022; 8:70. [PMID: 36038584 PMCID: PMC9424236 DOI: 10.1038/s41522-022-00332-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 08/05/2022] [Indexed: 11/17/2022] Open
Abstract
Microbiomes are rife for biotechnological exploitation, particularly the rumen microbiome, due to their complexicity and diversity. In this study, antimicrobial peptides (AMPs) from the rumen microbiome (Lynronne 1, 2, 3 and P15s) were assessed for their therapeutic potential against seven clinical strains of Pseudomonas aeruginosa. All AMPs exhibited antimicrobial activity against all strains, with minimum inhibitory concentrations (MICs) ranging from 4–512 µg/mL. Time-kill kinetics of all AMPs at 3× MIC values against strains PAO1 and LES431 showed complete kill within 10 min to 4 h, although P15s was not bactericidal against PAO1. All AMPs significantly inhibited biofilm formation by strains PAO1 and LES431, and induction of resistance assays showed no decrease in activity against these strains. AMP cytotoxicity against human lung cells was also minimal. In terms of mechanism of action, the AMPs showed affinity towards PAO1 and LES431 bacterial membrane lipids, efficiently permeabilising the P. aeruginosa membrane. Transcriptome and metabolome analysis revealed increased catalytic activity at the cell membrane and promotion of β-oxidation of fatty acids. Finally, tests performed with the Galleria mellonella infection model showed that Lynronne 1 and 2 were efficacious in vivo, with a 100% survival rate following treatment at 32 mg/kg and 128 mg/kg, respectively. This study illustrates the therapeutic potential of microbiome-derived AMPs against P. aeruginosa infections.
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Affiliation(s)
- Adam J Mulkern
- IBERS, Aberystwyth University, Aberystwyth, SY23 3DA, Wales, UK. .,TWINCORE, Centre for Experimental and Clinical Infection Research, a Joint Venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany.
| | - Linda B Oyama
- Institute for Global Food Security, 19 Chlorine Gardens, Queen's University of Belfast, Belfast, Northern Ireland, BT9 5DP, UK
| | - Alan R Cookson
- IBERS, Aberystwyth University, Aberystwyth, SY23 3DA, Wales, UK
| | - Christopher J Creevey
- Institute for Global Food Security, 19 Chlorine Gardens, Queen's University of Belfast, Belfast, Northern Ireland, BT9 5DP, UK
| | - Toby J Wilkinson
- IBERS, Aberystwyth University, Aberystwyth, SY23 3DA, Wales, UK.,The Roslin Institute and R(D)SVS, University of Edinburgh, Easter Bush, Roslin, Edinburgh, EH25 9RG, UK
| | - Hamza Olleik
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, 13397, Marseille, France
| | - Marc Maresca
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, 13397, Marseille, France
| | - Giarla C da Silva
- Laboratório de Genética Molecular de Bactérias, Departamento de Microbiologia, Instituto de Biotecnologia Aplicada à Agropecuária, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Patricia P Fontes
- Laboratório de Genética Molecular de Bactérias, Departamento de Microbiologia, Instituto de Biotecnologia Aplicada à Agropecuária, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Denise M S Bazzolli
- Laboratório de Genética Molecular de Bactérias, Departamento de Microbiologia, Instituto de Biotecnologia Aplicada à Agropecuária, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Hilario C Mantovani
- Departamento de Microbiologia, Universidade Federal de Viçosa, Viçosa, 36570-900, Brazil
| | - Bamu F Damaris
- TWINCORE, Centre for Experimental and Clinical Infection Research, a Joint Venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Luis A J Mur
- IBERS, Aberystwyth University, Aberystwyth, SY23 3DA, Wales, UK
| | - Sharon A Huws
- Institute for Global Food Security, 19 Chlorine Gardens, Queen's University of Belfast, Belfast, Northern Ireland, BT9 5DP, UK.
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23
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Infection Control Measures against Candidaauris in Healthcare Facilities. Processes (Basel) 2022. [DOI: 10.3390/pr10081625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Candida auris is an emerging multidrug-resistant yeast with high mortality rate, especially in patients with underlying co-morbidities. It has been known to contaminate the environment and colonize human skin for prolonged periods in healthcare settings leading to difficult-to-control outbreaks. However, there is limited literature on the efficacy of different disinfectants/antiseptics, which can effectively decontaminate the environment and decolonize patients to prevent the spread of C. auris. This review highlights recommendations available in the literature for detection and control of C. auris in healthcare settings. Detection of C. auris by biochemical and automated methods has often been misleading. Availability of C. auris-specific PCR can prove to be a more reliable technique for detection of C. auris. Control measures for transmission of C. auris include use of registered hospital grade disinfectant active against Clostridium difficile cleaning the environment and equipment and chlorhexidine for decolonization of patients. Hand hygiene using soap and water, followed by use of alcohol-based hand sanitizer for maximal disinfection, is recommended for healthcare workers.
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24
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Sharan M, Vijay D, Dhaka P, Bedi JS, Gill JPS. Biofilms as a microbial hazard in the food industry: A scoping review. J Appl Microbiol 2022; 133:2210-2234. [PMID: 35945912 DOI: 10.1111/jam.15766] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 08/06/2022] [Indexed: 11/29/2022]
Abstract
Biofilms pose a serious public health hazard with a significant economic impact on the food industry. The present scoping review is designed to analyze the literature published during 2001-2020 on biofilm formation of microbes, their detection methods, and association with antimicrobial resistance (if any). The peer-reviewed articles retrieved from 04 electronic databases were assessed using PRISMA-ScR guidelines. From the 978 preliminary search results, a total of 88 publications were included in the study. On analysis, the commonly isolated pathogens were Listeria monocytogenes, Staphylococcus aureus, Salmonella spp., Escherichia coli, Bacillus spp., Vibrio spp., Campylobacter jejuni and Clostridium perfringens. The biofilm-forming ability of microbes was found to be influenced by various factors such as attachment surfaces, temperature, presence of other species, nutrient availability etc. A total of 18 studies characterized the biofilm-forming genes, particularly for S. aureus, Salmonella spp., and E. coli. In most studies, polystyrene plate and/or stainless-steel coupons were used for biofilm formation, and the detection was carried out by crystal violet assays and/or by plate counting method. The strain-specific significant differences in biofilm formation were observed in many studies, and few studies carried out analysis of multi-species biofilms. The association between biofilm formation and antimicrobial resistance wasn't clearly defined. Further, viable but non-culturable (VBNC) form of the foodborne pathogens is posing an unseen (by conventional cultivation techniques) but potent threat food safety. The present review recommends the need for carrying out systematic surveys and risk analysis of biofilms in food chain to highlight the evidence-based public health concerns, especially in regions where microbiological food hazards are quite prevalent.
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Affiliation(s)
- Manjeet Sharan
- Centre for One Health, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India
| | - Deepthi Vijay
- Centre for One Health, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India.,Present Address: Department of Veterinary Public Health, College of Veterinary and Animal Sciences, Kerala, India
| | - Pankaj Dhaka
- Centre for One Health, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India
| | - Jasbir Singh Bedi
- Centre for One Health, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India
| | - Jatinder Paul Singh Gill
- Centre for One Health, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India
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25
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Wang Y, Jin Y, Chen Y, Han T, Chen Y, Wang C. A preliminary study on surface bioactivation of polyaryletherketone by UV-grafting with PolyNaSS: influence on osteogenic and antibacterial activities. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2022; 33:1845-1865. [PMID: 35757914 DOI: 10.1080/09205063.2022.2088524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Polyaryletherketone (PAEK) has good biocompatibility and mechanical properties and thus may have great potential in the fields of reparative medicine and bone intervention. In this study, the key representative PAEKs, polyetheretherketone (PEEK) and polyetherketoneketone (PEKK), were modified by UV grafting with sodium polystyrene sulfonate (polyNaSS) to improve their biocompatibility. Toluidine blue staining and Fourier transform infrared spectroscopic analyses showed that sulfonic acid groups were successfully introduced into PAEK, and the hydrophilicity and protein adsorption capacity of the materials were enhanced in a concentration-dependent manner. The effects of the grafted polyNaSS on osteoinduction and antibacterial properties of PAEK were analyzed in detail. We found that polyNaSS enhanced the viability, alkaline phosphatase activity, calcium mineral deposition, and levels of expression of osteoblast-related genes and proteins of adherent human umbilical cord Wharton's jelly-derived mesenchymal stem cells. In addition, when Escherichia coli, Staphylococcus aureus and Porphyromonas gingivalis were incubated with the materials, bacterial colony counting revealed that grafting of polyNaSS onto PAEK led to more potent inhibition of bacterial adhesion, and polyNaSS-grafted PEKK had stronger antibacterial performance than did polyNaSS-grafted PEEK fabricated under the same grafting conditions. These data show that polyNaSS-grafted PAEK, and particularly polyNaSS-grafted PEKK, may be useful as orthopedic and dental implant materials.
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Affiliation(s)
- Yijin Wang
- Jiangsu Key Laboratory of Oral Diseases, Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Yabing Jin
- Jiangsu Key Laboratory of Oral Diseases, Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Yiyi Chen
- Jiangsu Key Laboratory of Oral Diseases, Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Tianlei Han
- Jiangsu Key Laboratory of Oral Diseases, Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Yuhong Chen
- Jiangsu Key Laboratory of Oral Diseases, Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Chen Wang
- Jiangsu Key Laboratory of Oral Diseases, Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
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26
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Chee Wezen X, Chandran A, Eapen RS, Waters E, Bricio-Moreno L, Tosi T, Dolan S, Millership C, Kadioglu A, Gründling A, Itzhaki LS, Welch M, Rahman T. Structure-Based Discovery of Lipoteichoic Acid Synthase Inhibitors. J Chem Inf Model 2022; 62:2586-2599. [PMID: 35533315 PMCID: PMC9131456 DOI: 10.1021/acs.jcim.2c00300] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Indexed: 01/20/2023]
Abstract
Lipoteichoic acid synthase (LtaS) is a key enzyme for the cell wall biosynthesis of Gram-positive bacteria. Gram-positive bacteria that lack lipoteichoic acid (LTA) exhibit impaired cell division and growth defects. Thus, LtaS appears to be an attractive antimicrobial target. The pharmacology around LtaS remains largely unexplored with only two small-molecule LtaS inhibitors reported, namely "compound 1771" and the Congo red dye. Structure-based drug discovery efforts against LtaS remain unattempted due to the lack of an inhibitor-bound structure of LtaS. To address this, we combined the use of a molecular docking technique with molecular dynamics (MD) simulations to model a plausible binding mode of compound 1771 to the extracellular catalytic domain of LtaS (eLtaS). The model was validated using alanine mutagenesis studies combined with isothermal titration calorimetry. Additionally, lead optimization driven by our computational model resulted in an improved version of compound 1771, namely, compound 4 which showed greater affinity for binding to eLtaS than compound 1771 in biophysical assays. Compound 4 reduced LTA production in S. aureus dose-dependently, induced aberrant morphology as seen for LTA-deficient bacteria, and significantly reduced bacteria titers in the lung of mice infected with S. aureus. Analysis of our MD simulation trajectories revealed the possible formation of a transient cryptic pocket in eLtaS. Virtual screening (VS) against the cryptic pocket led to the identification of a new class of inhibitors that could potentiate β-lactams against methicillin-resistant S. aureus. Our overall workflow and data should encourage further drug design campaign against LtaS. Finally, our work reinforces the importance of considering protein conformational flexibility to a successful VS endeavor.
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Affiliation(s)
- Xavier Chee Wezen
- Science
Program, School of Chemical Engineering and Science, Faculty of Engineering,
Computing and Science, Swinburne University
of Technology Sarawak, Kuching 93350, Malaysia
| | - Aneesh Chandran
- Department
of Biotechnology & Microbiology, Kannur
University, Kannur 670 661, Kerala, India
| | | | - Elaine Waters
- Department
of Clinical Infection Microbiology and Immunology, Institute of Infection
and Global Health, University of Liverpool, Liverpool L69 7BE, U.K.
| | - Laura Bricio-Moreno
- Department
of Clinical Infection Microbiology and Immunology, Institute of Infection
and Global Health, University of Liverpool, Liverpool L69 7BE, U.K.
| | - Tommaso Tosi
- Section
of Molecular Microbiology and MRC Centre for Molecular Bacteriology
and Infection, Imperial College London, London SW7 2AZ, U.K.
| | - Stephen Dolan
- Department
of Biochemistry, University of Cambridge, Cambridge CB2 1QW, U.K.
| | - Charlotte Millership
- Section
of Molecular Microbiology and MRC Centre for Molecular Bacteriology
and Infection, Imperial College London, London SW7 2AZ, U.K.
| | - Aras Kadioglu
- Department
of Clinical Infection Microbiology and Immunology, Institute of Infection
and Global Health, University of Liverpool, Liverpool L69 7BE, U.K.
| | - Angelika Gründling
- Section
of Molecular Microbiology and MRC Centre for Molecular Bacteriology
and Infection, Imperial College London, London SW7 2AZ, U.K.
| | - Laura S. Itzhaki
- Department
of PharmacologyUniversity of CambridgeCambridgeCB2 1PDU.K.
| | - Martin Welch
- Department
of Biochemistry, University of Cambridge, Cambridge CB2 1QW, U.K.
| | - Taufiq Rahman
- Department
of PharmacologyUniversity of CambridgeCambridgeCB2 1PDU.K.
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27
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Doerffel A, Reinert A, Böttcher D, Winter K, Brehm W, Gittel C. [Venous catheters in horses - early ultrasonographic venous abnormalities and evidence of biofilms]. Tierarztl Prax Ausg G Grosstiere Nutztiere 2022; 50:101-114. [PMID: 35523187 DOI: 10.1055/a-1809-6477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Complications associated with indwelling intravenous catheters vary from minor to severe. Changes in tissue architecture and vein structure may be detectable prior to clinical alterations. The aim of the study was to characterize and compare changes in a catheterized vein and surrounding tissue by clinical and ultrasonographic examination. Microbiological infestation of catheter specimens was assessed. MATERIAL AND METHODS In this prospective, observational, clinical study 55 horses with an indwelling intravenous catheter have been included. Subsequent to catheter placement, vein and surrounding tissue were daily examined clinically and by ultrasonographic examination at predetermined localizations. After sterile removal of the catheters, specimens underwent microbiological testing and scanning electron microscopy. Obtained data were analyzed via descriptive statistics. Thickness of the venous wall was compared at predetermined localizations and time points for several parameters with the help of non-parametric tests (level of significance at p < 0.05, post-hoc Bonferroni correction). RESULTS Overall, in 41.8 % of the horses transient alterations (swelling) of the surrounding tissue occurred during catheterization. Median catheterization was 69.5 hours (19 hour-10 days). With ultrasonography, venous valves and collateral vessels could be detected reliably. Significant alterations in wall thickness during catheterization were associated with various factors (location site [p ≤ 0.001], season [p = 0.006], anesthesia [p ≤ 0.001]).Microbiological analysis revealed a positive result in 23.5 %, 12 of the 51 samples; raster electron microscopy showed presence of bacteria in 25.0 %, 4 of the 16 investigated catheter samples. CONCLUSION AND CLINICAL RELEVANCE Local tissue changes at the insertion site of the catheter are commonly associated with catheterization, and are easily detectable with ultrasonography. Despite the easy performance in a clinical setting, the benefit of routine ultrasonographic monitoring of catheterized veins might be questionable with regard to early identification and prediction of catheter-associated venous disease. Bacteria might be detectable morphologically on the catheter but frequently lack a positive result from standard bacterial cultivation.
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Affiliation(s)
- Annika Doerffel
- Klinik für Pferde, Veterinärmedizinische Fakultät, Universität Leipzig
| | - Anja Reinert
- Veterinär-Anatomisches Institut, Veterinärmedizinische Fakultät, Universität Leipzig
| | - Denny Böttcher
- Institut für Veterinär-Pathologie, Veterinärmedizinische Fakultät, Universität Leipzig
| | - Karsten Winter
- Institut für Anatomie, Medizinische Fakultät, Universität Leipzig
| | - Walter Brehm
- Klinik für Pferde, Veterinärmedizinische Fakultät, Universität Leipzig
| | - Claudia Gittel
- Klinik für Pferde, Veterinärmedizinische Fakultät, Universität Leipzig.,The Queen's Veterinary School Hospital, Universität Cambridge, Vereinigtes Königreich
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28
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Zangirolami AC, Carbinatto F, Filho JDV, Bagnato VS, Blanco KC. Impact of light-activated curcumin and curcuminoids films for catheters decontamination. Colloids Surf B Biointerfaces 2022; 213:112386. [PMID: 35176605 DOI: 10.1016/j.colsurfb.2022.112386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 01/18/2022] [Accepted: 01/30/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND Biofilms are microbial communities protected by an extra polymeric matrix, which promotes a defense against antimicrobial agents. Cells attached in surfaces and promote infections. Photodynamic inactivation (PDI) is one of the strategies to eliminate infections due to the facility of use and the absence of resistance by bacteria. The study combines formulation with curcuminoids and with Photogem(R), illuminating them with 450 nm and 630 nm, respectively. METHODS Films were prepared with pectin, glycerin, Sodium Lauryl Sulfate, curcumin, curcuminoids, or Photogem(R) (0.75; 0.75 mg/mL and 0.03 mg/mL respectively). Bacterial biofilms were formed during 3, 4, or 7 days on catheters and illumination with LED devices at 450 nm and 630 nm. RESULTS The best PDI applied in S. aureus 7-days biofilm with curcuminoid film. Photogem film was the best strategy for PDI in E. coli 7-day biofilm. Curcumin film promoted similar results with S. aureus and E. coli. Light penetration demonstrated a similar decreased exponential curve along the increase of thickness of biofilm. CONCLUSION Curcuminoids, curcumin and Photogem® show efficient solubilization and availability in formulation with relevant results in PDI. S aureus biofilms were more susceptible to curcuminoid film. E coli biofilms were more susceptible to Photogem film.
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Affiliation(s)
| | - Fernanda Carbinatto
- São Carlos Institute of Physics, University of São Paulo, Box 369, 13566-970 São Carlos, SP, Brazil
| | - Jose Dirceu Vollet Filho
- São Carlos Institute of Physics, University of São Paulo, Box 369, 13566-970 São Carlos, SP, Brazil
| | - Vanderlei Salvador Bagnato
- São Carlos Institute of Physics, University of São Paulo, Box 369, 13566-970 São Carlos, SP, Brazil; Texas A&M University, College Station, TX, USA
| | - Kate Cristina Blanco
- São Carlos Institute of Physics, University of São Paulo, Box 369, 13566-970 São Carlos, SP, Brazil
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29
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Kaushik S, Yadav J, Das S, Karthikeyan D, Chug R, Jyoti A, Srivastava VK, Jain A, Kumar S, Sharma V. Identification of Protein Drug Targets of Biofilm Formation and Quorum
Sensing in Multidrug Resistant Enterococcus faecalis. Curr Protein Pept Sci 2022; 23:248-263. [DOI: 10.2174/1389203723666220526155644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/16/2022] [Accepted: 04/06/2022] [Indexed: 11/22/2022]
Abstract
Abstract:
Enterococcus faecalis (E. faecalis) is an opportunistic multidrug-resistant (MDR) pathogen
found in the guts of humans and farmed animals. Due to the occurrence of (MDR) strain there is an
urgent need to look for an alternative treatment approach. E. faecalis is a Gram-positive bacterium,
which is among the most prevalent multidrug resistant hospital pathogens. Its ability to develop quorum
sensing (QS) mediated biofilm formation further exacerbates the pathogenicity and triggers lifethreatening
infections. Therefore, developing a suitable remedy for curing E. faecalis mediated enterococcal
infections is an arduous task. Several putative virulence factors and proteins are involved in the
development of biofilms in E. faecalis. Such proteins often play important roles in virulence, disease,
and colonization by pathogens. The elucidation of the structure-function relationship of such protein
drug targets and the interacting compounds could provide an attractive paradigm towards developing
structure-based drugs against E. faecalis. This review provides a comprehensive overview of the current
status, enigmas that warrant further studies, and the prospects toward alleviating the antibiotic resistance
in E. faecalis. Specifically, the role of biofilm and quorum sensing (QS) in the emergence of
MDR strains had been elaborated along with the importance of the protein drug targets involved in both
the processes.
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Affiliation(s)
- Sanket Kaushik
- Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur, India
| | - Jyoti Yadav
- Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur, India
| | - Satyajeet Das
- Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur, India
- Structural Biology Lab, CSIR-Institute of Microbial Technology, Chandigarh, India
| | | | - Ravneet Chug
- Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur, India
| | - Anupam Jyoti
- Department of Biotechnology, University Institute of Biotechnology,
Chandigarh University, Chandigarh, India
| | | | - Ajay Jain
- Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur, India
| | - Sanjit Kumar
- Centre for Bioseparation Technology, VIT
University, Vellore-632014, Tamil Nadu, India
| | - Vinay Sharma
- Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur, India
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30
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OUIDIR T, GABRIEL B, CHABANE YNAIT. Overview of multi-species biofilms in different ecosystems: wastewater treatment, soil and oral cavity. J Biotechnol 2022; 350:67-74. [DOI: 10.1016/j.jbiotec.2022.03.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 03/21/2022] [Accepted: 03/23/2022] [Indexed: 01/27/2023]
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31
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Wu Y, Zhou H, Zeng Y, Xie H, Ma D, Wang Z, Liang H. Recent Advances in Copper-Doped Titanium Implants. MATERIALS 2022; 15:ma15072342. [PMID: 35407675 PMCID: PMC8999642 DOI: 10.3390/ma15072342] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 03/11/2022] [Accepted: 03/18/2022] [Indexed: 01/27/2023]
Abstract
Titanium (Ti) and its alloys have been extensively used as implant materials in clinical practice due to their high corrosion resistance, light weight and excellent biocompatibility. However, the insufficient intrinsic osteogenic capacity of Ti and its alloys impedes bone repair and regeneration, and implant-related infection or inflammation remains the leading cause of implant failure. Bacterial infections or inflammatory diseases constitute severe threats to human health. The physicochemical properties of the material are critical to the success of clinical procedures, and the doping of Cu into Ti implants has been confirmed to be capable of enhancing the bone repair/regeneration, angiogenesis and antibacterial capability. This review outlines the recent advances in the design and preparation of Cu-doped Ti and Ti alloy implants, with a special focus on various methods, including plasma immersion implantation, magnetron sputtering, galvanic deposition, microarc oxidation and sol-gel synthesis. More importantly, the antibacterial and mechanical properties as well as the corrosion resistance and biocompatibility of Cu-doped Ti implants from different methods are systematically reviewed, and their prospects and limitations are also discussed.
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32
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Kasagaki S, Hashimoto M, Maeda S. Subminimal inhibitory concentrations of ampicillin and mechanical stimuli cooperatively promote cell-to-cell plasmid transformation in Escherichia coli. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 3:100130. [PMID: 35909620 PMCID: PMC9325862 DOI: 10.1016/j.crmicr.2022.100130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Low concentrations of ampicillin promote horizontal plasmid transfer in E. coli. Mechanical stimuli also promote horizontal plasmid transfer in E. coli. Those two kinds of stimuli cooperatively promote plasmid transfer. This plasmid transfer occurs via the cell-to-cell transformation mechanism. This transformation occurs between biofilm cells under flexible conditions.
Horizontal gene transfer (HGT) is a bacterial evolution tool for improved survival. Although several environmental stimuli induce or promote HGT, the diversity and complexity of the environmental factors have not been sufficiently elucidated. In this study, we showed that the biofilm culture of Escherichia coli at the air–solid interface in the presence of a subminimal inhibitory concentration (sub-MIC) of ampicillin (∼0.5–4 µg/mL) and subsequent mechanical stimulation (rolling small glass balls, ø = 5–8 mm) cooperatively promoted horizontal plasmid transfer without the usual competence-inducing conditions. Either of the two treatments promoted plasmid transfer at a lower frequency than when the treatments were combined. The effect of several parameters on the two treatments was tested and then optimized, achieving a high frequency of plasmid transfer (up to 10−6 per cell) under optimal conditions. Plasmid transfer was DNase-sensitive for both treatments, demonstrating its mechanism of transformation. Plasmid transfer occurred using various E. coli strains, plasmids, ball materials, shaking conditions, and even the mechanical stimulation of brushing the biofilm with a toothbrush, indicating the conditional flexibility of this phenomenon. This is the first demonstration of the promoting effect of the combination of a sub-MIC antibiotic and mechanical stimulation on horizontal plasmid transfer between E. coli cells via transformation. Regarding environmental bacterial physiology, the aggregations or biofilms of bacterial cells may encounter both sub-MIC antibiotics and mechanical stimuli in some specific environments, therefore, this type of HGT could also occur naturally.
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Verdeguer P, Gil J, Punset M, Manero JM, Nart J, Vilarrasa J, Ruperez E. Citric Acid in the Passivation of Titanium Dental Implants: Corrosion Resistance and Bactericide Behavior. MATERIALS (BASEL, SWITZERLAND) 2022; 15:545. [PMID: 35057263 PMCID: PMC8779281 DOI: 10.3390/ma15020545] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/29/2021] [Accepted: 01/04/2022] [Indexed: 01/27/2023]
Abstract
The passivation of titanium dental implants is performed in order to clean the surface and obtain a thin layer of protective oxide (TiO2) on the surface of the material in order to improve its behavior against corrosion and prevent the release of ions into the physiological environment. The most common chemical agent for the passivation process is hydrochloric acid (HCl), and in this work we intend to determine the capacity of citric acid as a passivating and bactericidal agent. Discs of commercially pure titanium (c.p.Ti) grade 4 were used with different treatments: control (Ctr), passivated by HCl, passivated by citric acid at 20% at different immersion times (20, 30, and 40 min) and a higher concentration of citric acid (40%) for 20 min. Physical-chemical characterization of all of the treated surfaces has been carried out by scanning electronic microscopy (SEM), confocal microscopy, and the 'Sessile Drop' technique in order to obtain information about different parameters (topography, elemental composition, roughness, wettability, and surface energy) that are relevant to understand the biological response of the material. In order to evaluate the corrosion behavior of the different treatments under physiological conditions, open circuit potential and potentiodynamic tests have been carried out. Additionally, ion release tests were realized by means of ICP-MS. The antibacterial behavior has been evaluated by performing bacterial adhesion tests, in which two strains have been used: Pseudomonas aeruginosa (Gram-) and Streptococcus sanguinis (Gram+). After the adhesion test, a bacterial viability study has been carried out ('Life and Death') and the number of colony-forming units has been calculated with SEM images. The results obtained show that the passivation with citric acid improves the hydrophilic character, corrosion resistance, and presents a bactericide character in comparison with the HCl treatment. The increasing of citric acid concentration improves the bactericide effect but decreases the corrosion resistance parameters. Ion release levels at high citric acid concentrations increase very significantly. The effect of the immersion times studied do not present an effect on the properties.
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Affiliation(s)
- Pablo Verdeguer
- Bioengineering Institute of Technology, International University of Catalonia, Josep Trueta s/n, 08195 Barcelona, Spain;
| | - Javier Gil
- Bioengineering Institute of Technology, International University of Catalonia, Josep Trueta s/n, 08195 Barcelona, Spain;
- School of Dentistry, Universitat Internacional de Catalunya (UIC), C/Josep Trueta s/n, Sant Cugat del Vallès, 08125 Barcelona, Spain; (J.N.); (J.V.)
| | - Miquel Punset
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Engineering, Universitat Politècnica de Catalunya (UPC), Av. Eduard Maristany 16, 08019 Barcelona, Spain; (M.P.); (J.M.M.); (E.R.)
- Barcelona Research Centre in Multiscale Science and Engineering, Technical University of Catalonia (UPC), Av. Eduard Maristany, 10-14, 08019 Barcelona, Spain
- UPC Innovation and Technology Center (CIT-UPC), Technical University of Catalonia (UPC), C/Jordi Girona 3-1, 08034 Barcelona, Spain
- Institut de Recerca San Joan de Déu, Hospital Sant Joan de Deu (IRSJD), 08034 Barcelona, Spain
| | - José María Manero
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Engineering, Universitat Politècnica de Catalunya (UPC), Av. Eduard Maristany 16, 08019 Barcelona, Spain; (M.P.); (J.M.M.); (E.R.)
- Barcelona Research Centre in Multiscale Science and Engineering, Technical University of Catalonia (UPC), Av. Eduard Maristany, 10-14, 08019 Barcelona, Spain
- Institut de Recerca San Joan de Déu, Hospital Sant Joan de Deu (IRSJD), 08034 Barcelona, Spain
| | - José Nart
- School of Dentistry, Universitat Internacional de Catalunya (UIC), C/Josep Trueta s/n, Sant Cugat del Vallès, 08125 Barcelona, Spain; (J.N.); (J.V.)
| | - Javi Vilarrasa
- School of Dentistry, Universitat Internacional de Catalunya (UIC), C/Josep Trueta s/n, Sant Cugat del Vallès, 08125 Barcelona, Spain; (J.N.); (J.V.)
| | - Elisa Ruperez
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Engineering, Universitat Politècnica de Catalunya (UPC), Av. Eduard Maristany 16, 08019 Barcelona, Spain; (M.P.); (J.M.M.); (E.R.)
- Barcelona Research Centre in Multiscale Science and Engineering, Technical University of Catalonia (UPC), Av. Eduard Maristany, 10-14, 08019 Barcelona, Spain
- Institut de Recerca San Joan de Déu, Hospital Sant Joan de Deu (IRSJD), 08034 Barcelona, Spain
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Buck LD, Paladino MM, Nagashima K, Brezel ER, Holtzman JS, Urso SJ, Ryno LM. Temperature-Dependent Influence of FliA Overexpression on PHL628 E. coli Biofilm Growth and Composition. Front Cell Infect Microbiol 2022; 11:775270. [PMID: 34976858 PMCID: PMC8718923 DOI: 10.3389/fcimb.2021.775270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 11/29/2021] [Indexed: 11/13/2022] Open
Abstract
Biofilm growth and survival pose a problem in both medical and industrial fields. Bacteria in biofilms are more tolerant to antibiotic treatment due to the inability of antibiotics to permeate to the bottom layers of cells in a biofilm and the creation of altered microenvironments of bacteria deep within the biofilm. Despite the abundance of information we have about E. coli biofilm growth and maturation, we are still learning how manipulating different signaling pathways influences the formation and fitness of biofilm. Understanding the impact of signaling pathways on biofilm formation may narrow the search for novel small molecule inhibitors or activators that affect biofilm production and stability. Here, we study the influence of the minor sigma transcription factor FliA (RpoF, sigma-28), which controls late-stage flagellar assembly and chemotaxis, on biofilm production and composition at various temperatures in the E. coli strain PHL628, which abundantly produces the extracellular structural protein curli. We examined FliA's influence on external cellular structures like curli and flagella and the biomolecular composition of the biofilm's extracellular polymeric substance (EPS) using biochemical assays, immunoblotting, and confocal laser scanning microscopy (CLSM). At 37°C, FliA overexpression results in the dramatic growth of biofilm in polystyrene plates and more modest yet significant biofilm growth on silica slides. We observed no significant differences in curli concentration and carbohydrate concentration in the EPS with FliA overexpression. Still, we did see significant changes in the abundance of EPS protein using CLSM at higher growth temperatures. We also noticed increased flagellin concentration, a major structural protein in flagella, occurred with FliA overexpression, specifically in planktonic cultures. These experiments have aided in narrowing our focus to FliA's role in changing the protein composition of the EPS, which we will examine in future endeavors.
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Affiliation(s)
- Luke D Buck
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, OH, United States
| | - Maddison M Paladino
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, OH, United States
| | - Kyogo Nagashima
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, OH, United States
| | - Emma R Brezel
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, OH, United States
| | - Joshua S Holtzman
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, OH, United States
| | - Sarel J Urso
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, OH, United States
| | - Lisa M Ryno
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, OH, United States
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Rolland du Roscoat S, Ivankovic T, Lenoir N, Dekic S, Martins JMF, Geindreau C. First visualisation of bacterial biofilms in 3D porous media with neutron microtomography without contrast agent. J Microsc 2021; 285:20-28. [PMID: 34664715 DOI: 10.1111/jmi.13063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/23/2021] [Accepted: 09/28/2021] [Indexed: 11/27/2022]
Abstract
Characterising bacterial biofilm growth in porous media is important for developing reliable numerical models of biofouling in industrial biofilters. One of the promising imaging methods to do that has been a recent successful application of X-ray microtomography. However, this technique requires a contrast agent (1-chloronaphtalene, for example) to distinguish biofilm from the liquid phase, which raises concern about biofilm disruption and impaired image interpretation. To overcome these drawbacks, we tested a new approach based on neutron tomography (NT), which does not need a contrast agent, by imaging two types of porous media (polytetrafluoroethylene - PTFE - and clay beads of various diameters) in glass or PTFE tubes in which bacterial biofilms were grown for 7 days and by comparing these images with the ones obtained with X-ray microtomography. NT images showed that the biofilm formed preferentially around the beads and at bead/bead interface. Visual comparison of both imaging techniques showed consistent biofilm spatial distributions and that the contrasting agent did not significantly disrupt the biofilm. NT images, on the other hand, were still too noisy to allow quantitative measurements. Therefore, X-ray microtomography (provided it uses non-disruptive contrast agents) seems to provide more reliable microstructural descriptors.
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Affiliation(s)
| | - Tomislav Ivankovic
- Faculty of Science, Department of Biology, University of Zagreb, Zagreb, Croatia
| | - Nicolas Lenoir
- 3SR, UMR 5521, Université Grenoble Alpes, CNRS G-INP, Grenoble, France.,Next Beamline, Institut Laue-Langevin, Grenoble, France
| | - Svjetlana Dekic
- Faculty of Science, Department of Biology, University of Zagreb, Zagreb, Croatia
| | - Jean M F Martins
- IGE, UMR 5001, Université Grenoble Alpes, CNRS G-INP, Grenoble, France
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Dong Y, Liu L, Sun J, Peng W, Dong X, Gu Y, Ma Z, Gan D, Liu P. Phosphonate/quaternary ammonium copolymers as high-efficiency antibacterial coating for metallic substrates. J Mater Chem B 2021; 9:8321-8329. [PMID: 34522945 DOI: 10.1039/d1tb01676h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Designing a coating material with efficient bactericidal property to cope with bacterial associated infections is highly desirable for metallic implants and devices. Here, we report phosphonate/quaternary ammonium copolymers, p(DEMMP-co-TMAEMA), as the new type of metal anchorable high-efficiency antibacterial coating. Seven p(DEMMP-co-TMAEMA) polymers with varied cationic components were precisely prepared via random radical polymerization. Copolymers were constructed on titanium alloy (TC4) substrates based on strong covalent bonding between the phosphonate group and metallic substrates through a one-step process as evidenced by XPS and water contact angle tests. A robust relationship between the composition of the copolymers and the bactericidal ability endowed to TC4 substrates was established. Results showed that the copolymer, with the pDEMMP content even as low as 6.3%, was able to anchor onto TC4 substrates. With the increase of cationic pTMAEMA content from 4.0 to 93.7% in the coating copolymer, the bactericidal ability endowed to the TC4 substrates was steadily increased from 39.4 to 98.8% for S. aureus and from 70.0 to 99.4% for E. coli after 8 h's of contacting. All p(DEMMP-co-TMAEMA) coating on TC4 substrates showed limited cytotoxicity to C2C12 cells. Notably, the phosphonate/quaternary amine copolymers can be easily constructed on diverse biomedical metals such as titanium (Ti), stainless steel (SS), and Ni/Cr alloys with significantly increased antibacterial performance, demonstrating the potency of the copolymer as the general high-efficiency antibacterial coating for diverse bio-metals.
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Affiliation(s)
- Yaning Dong
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Bio-functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.
| | - Li Liu
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Bio-functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.
| | - Jin Sun
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Bio-functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.
| | - Wan Peng
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Bio-functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.
| | - Xiaohan Dong
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Bio-functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.
| | - Yahui Gu
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Bio-functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.
| | - Zhuangzhuang Ma
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Bio-functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.
| | - Donglin Gan
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Bio-functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.
| | - Pingsheng Liu
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Bio-functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.
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Perry TW. Cutaneous microbial biofilm formation as an underlying cause of red scrotum syndrome. Eur J Med Res 2021; 26:95. [PMID: 34412706 PMCID: PMC8375042 DOI: 10.1186/s40001-021-00569-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 08/09/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Red scrotum syndrome is typically described as well-demarcated erythema of the anterior scrotum accompanied by persistent itching and burning. It is chronic and difficult to treat and contributes to significant psychological distress and reduction in quality of life. The medical literature surrounding the condition is sparse, with the prevalence likely under-recognized and the pathophysiology remaining poorly understood. Formation of a cutaneous microbial biofilm has not been proposed as an underlying etiology. Microbial biofilms can form whenever microorganisms are suspended in fluid on a surface for a prolonged time and are becoming increasingly recognized as important contributors to medical disease (e.g., chronic wounds). CASE PRESENTATION A 26-year-old man abruptly developed well-demarcated erythema of the bilateral scrotum after vaginal secretions were left covering the scrotum overnight. For 14 months, the patient experienced daily scrotal itching and burning while seeking care from multiple physicians and attempting numerous failed therapies. He eventually obtained complete symptomatic relief with the twice daily application of 0.8% menthol powder. Findings in support of a cutaneous microbial biofilm as the underlying etiology include: (1) the condition began following a typical scenario that would facilitate biofilm formation; (2) the demarcation of erythema precisely follows the scrotal hairline, suggesting that hair follicles acted as scaffolding during biofilm formation; (3) despite resolution of symptoms, the scrotal erythema has persisted, unchanged in boundary 15 years after the condition began; and (4) the erythematous skin demonstrates prolonged retention of gentian violet dye in comparison with adjacent unaffected skin, suggesting the presence of dye-avid material on the skin surface. CONCLUSION The probability that microorganisms, under proper conditions, can form biofilm on intact skin is poorly recognized. This case presents a compelling argument for a cutaneous microbial biofilm as the underlying cause of red scrotum syndrome in one patient, and a review of similarities with other reported cases suggests the same etiology is likely responsible for a significant portion of the total disease burden. This etiology may also be a significant contributor to the disease burden of vulvodynia, a condition with many similarities to red scrotum syndrome.
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Affiliation(s)
- Theodore W Perry
- Fee-Basis Hospitalist, North Texas VA Medical Center, 4500 South Lancaster Road, TX, 75216, Dallas, USA.
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Bacteriophage SRD2021 Recognizing Capsular Polysaccharide Shows Therapeutic Potential in Serotype K47 Klebsiella pneumoniae Infections. Antibiotics (Basel) 2021; 10:antibiotics10080894. [PMID: 34438943 PMCID: PMC8388747 DOI: 10.3390/antibiotics10080894] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 07/08/2021] [Accepted: 07/19/2021] [Indexed: 11/17/2022] Open
Abstract
Klebsiella pneumoniae is an opportunistic pathogen posing an urgent threat to global public health, and the capsule is necessary for K. pneumoniae infection and virulence. Phage-derived capsule depolymerases have shown great potential as antivirulence agents in treating carbapenem-resistant K. pneumoniae (CRKP) infections. However, the therapeutic potential of phages encoding depolymerases against CRKP remains poorly understood. In this study, we identified a long-tailed phage SRD2021 specific for mucoid CRKP with capsular K47 serotype, which is the predominant infectious K-type in Asia. Genome sequencing revealed that ΦSRD2021 belonged to the Drulisvirus genus and exhibited a capsular depolymerase domain in its tail fiber protein. A transposon-insertion library of host bacteria was constructed to identify the receptor for ΦSRD2021. We found that most phage-resistant mutants converted to a nonmucoid phenotype, including the mutant in wza gene essential for capsular polysaccharides export. Further knockout and complementation experiments confirmed that the Δwza mutant avoided adsorption by ΦSRD2021, indicating that the K47 capsular polysaccharide is the necessary receptor for phage infection. ΦSRD2021 lysed the bacteria mature biofilms and showed a therapeutic effect on the prevention and treatment of CRKP infection in the Galleria mellonella model. Furthermore, ΦSRD2021 also reduced the colonized CRKP in mouse intestines significantly. By recognizing the host capsule as a receptor, our results showed that ΦSRD2021 may be used as a potential antibacterial agent for K47 serotype K. pneumoniae infections.
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Gupta TT, Gupta NK, Burback P, Stoodley P. Free-Floating Aggregate and Single-Cell-Initiated Biofilms of Staphylococcus aureus. Antibiotics (Basel) 2021; 10:antibiotics10080889. [PMID: 34438938 PMCID: PMC8388712 DOI: 10.3390/antibiotics10080889] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 07/16/2021] [Accepted: 07/20/2021] [Indexed: 12/12/2022] Open
Abstract
Periprosthetic joint infection (PJI) occurring after artificial joint replacement is a major clinical issue requiring multiple surgeries and antibiotic interventions. Staphylococcus aureus is the common bacteria responsible for PJI. Recent in vitro research has shown that staphylococcal strains rapidly form free-floating aggregates in the presence of synovial fluid (SF) with biofilm-like resistance to antimicrobial agents. However, the development of biofilms formed from these aggregates under shear have not been widely investigated. Thus, in this study, we examined the progression of attached biofilms from free-floating aggregates. Biofilms were grown for 24 h in flow cells on titanium discs after inoculation with either pre-aggregated or single planktonic cells. Image analysis showed no significant difference between the biofilm formed from aggregates vs. the planktonic cells in terms of biomass, surface area, and thickness. Regarding antibiotic susceptibility, there were 1 and 2 log reductions in biofilms formed from single cells and aggregates, respectively, when treated with vancomycin for 24 h. Thus, this study demonstrates the formation of biofilm from free-floating aggregates and follows a similar developmental time period and shows similar antibiotic tolerance to more traditionally inoculated in vitro flow cell biofilms.
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Affiliation(s)
- Tripti Thapa Gupta
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210, USA; (N.K.G.); (P.S.)
- Correspondence:
| | - Niraj K. Gupta
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210, USA; (N.K.G.); (P.S.)
| | - Peter Burback
- Department of Biomedical Education and Anatomy, The Ohio State University, Columbus, OH 43210, USA;
| | - Paul Stoodley
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210, USA; (N.K.G.); (P.S.)
- Department of Orthopedics, The Ohio State University, Columbus, OH 43210, USA
- National Centre for Advanced Tribology at Southampton (nCATS), Mechanical Engineering, University of Southampton, Southampton SO17 1BJ, UK
- National Biofilm Innovation Centre (NBIC), University of Southampton, Southampton SO17 1BJ, UK
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40
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Ghosh UU, Ali H, Ghosh R, Kumar A. Bacterial streamers as colloidal systems: Five grand challenges. J Colloid Interface Sci 2021; 594:265-278. [PMID: 33765646 DOI: 10.1016/j.jcis.2021.02.102] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 12/21/2022]
Abstract
Bacteria can thrive in biofilms, which are intricately organized communities with cells encased in a self-secreted matrix of extracellular polymeric substances (EPS). Imposed hydrodynamic stresses can transform this active colloidal dispersion of bacteria and EPS into slender thread-like entities called streamers. In this perspective article, the reader is introduced to the world of such deformable 'bacteria-EPS' composites that are a subclass of the generic flow-induced colloidal structures. While bacterial streamers have been shown to form in a variety of hydrodynamic conditions (turbulent and creeping flows), its abiotic analogues have only been demonstrated in low Reynolds number (Re < 1) particle-laden polymeric flows. Streamers are relevant to a variety of situations ranging from natural formations in caves and river beds to clogging of biomedical devices and filtration membranes. A critical review of the relevant biophysical aspects of streamer formation phenomena and unique attributes of its material behavior are distilled to unveil five grand scientific challenges. The coupling between colloidal hydrodynamics, device geometry and streamer formation are highlighted.
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Affiliation(s)
- Udita U Ghosh
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India
| | - Hessein Ali
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Ranajay Ghosh
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA.
| | - Aloke Kumar
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India.
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Pashang R, Gilbride KA. From individual response to population ecology: Environmental factors restricting survival of vegetative bacteria at solid-air interfaces. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:144982. [PMID: 33592458 DOI: 10.1016/j.scitotenv.2021.144982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 12/06/2020] [Accepted: 01/02/2021] [Indexed: 06/12/2023]
Abstract
Combating microbial survival on dry surfaces contributes to improving public health in indoor environments (clinical and industrial settings) and extends to the natural environment. For vegetative bacteria at solid-air interfaces, lack of water impacts cellular response, and acclimation depends on community support in response to ecological processes. Gaining insights about important ecological processes leading to inhibition of microbial survival under extreme conditions, such as vicinity of highly radioactive nuclear waste, is key for improving engineering designs. Canada plans to store used nuclear fuel and radioactive waste in a deep geological repository (DGR) with a multiple-barrier system constructed at an approximate depth of 500 m. Microorganisms in highly compacted bentonite surrounding used fuel containers will be challenged by high pressure, temperature, and radiation, as well as limited water and nutrients. Thus, it is difficult to estimate microbial activities, given that the prime concern for a microbial community is survival, and energy expenditure is regulated. To enable preventive measures and for risk evaluation, a deeper understanding of community-based survival strategies of bacterial cells exposed to air (gaseous phase) during prolonged periods of desiccation is required. An in-depth review of collective studies that assess microbial survival and persistence during desiccation is presented here to augment and direct our prior knowledge about tactics used by bacteria for survival at interfaces in hostile natural environments including and similar to a DGR.
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Affiliation(s)
- Rosha Pashang
- Department of Chemistry and Biology, Ryerson University, Toronto, Canada; Department of Chemical Engineering, University of Bath, Bath, United Kingdom
| | - Kimberley A Gilbride
- Department of Chemistry and Biology, Ryerson University, Toronto, Canada; Ryerson Urban Water Group, Ryerson University, Toronto, Canada.
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42
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Lu N, Chen Z, Zhang W, Yang G, Liu Q, Böttger R, Zhou S, Liu Y. Effect of silver ion implantation on antibacterial ability of polyethylene food packing films. Food Packag Shelf Life 2021. [DOI: 10.1016/j.fpsl.2021.100650] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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43
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Manniello MD, Moretta A, Salvia R, Scieuzo C, Lucchetti D, Vogel H, Sgambato A, Falabella P. Insect antimicrobial peptides: potential weapons to counteract the antibiotic resistance. Cell Mol Life Sci 2021; 78:4259-4282. [PMID: 33595669 PMCID: PMC8164593 DOI: 10.1007/s00018-021-03784-z] [Citation(s) in RCA: 111] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 01/19/2021] [Accepted: 01/29/2021] [Indexed: 02/07/2023]
Abstract
Misuse and overuse of antibiotics have contributed in the last decades to a phenomenon known as antibiotic resistance which is currently considered one of the principal threats to global public health by the World Health Organization. The aim to find alternative drugs has been demonstrated as a real challenge. Thanks to their biodiversity, insects represent the largest class of organisms in the animal kingdom. The humoral immune response includes the production of antimicrobial peptides (AMPs) that are released into the insect hemolymph after microbial infection. In this review, we have focused on insect immune responses, particularly on AMP characteristics, their mechanism of action and applications, especially in the biomedical field. Furthermore, we discuss the Toll, Imd, and JAK-STAT pathways that activate genes encoding for the expression of AMPs. Moreover, we focused on strategies to improve insect peptides stability against proteolytic susceptibility such as D-amino acid substitutions, N-terminus modification, cyclization and dimerization.
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Affiliation(s)
- M D Manniello
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100, Potenza, Italy
| | - A Moretta
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100, Potenza, Italy
| | - R Salvia
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100, Potenza, Italy
- Spinoff XFlies S.R.L, University of Basilicata, Via dell'Ateneo Lucano 10, 85100, Potenza, Italy
| | - C Scieuzo
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100, Potenza, Italy
- Spinoff XFlies S.R.L, University of Basilicata, Via dell'Ateneo Lucano 10, 85100, Potenza, Italy
| | - D Lucchetti
- Department of Translational Medicine and Surgery, Università Cattolica del Sacro Cuore, Rome, Italy
| | - H Vogel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745, Jena, Germany
| | - A Sgambato
- Department of Translational Medicine and Surgery, Università Cattolica del Sacro Cuore, Rome, Italy
- Centro di Riferimento Oncologico Della Basilicata (IRCCS-CROB), Rionero in Vulture (PZ), Italy
| | - P Falabella
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100, Potenza, Italy.
- Spinoff XFlies S.R.L, University of Basilicata, Via dell'Ateneo Lucano 10, 85100, Potenza, Italy.
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44
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Wang Y. Liposome as a delivery system for the treatment of biofilm-mediated infections. J Appl Microbiol 2021; 131:2626-2639. [PMID: 33650748 DOI: 10.1111/jam.15053] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 02/22/2021] [Accepted: 02/24/2021] [Indexed: 12/11/2022]
Abstract
Biofilm formation by pathogenic microorganisms has been a tremendous challenge for antimicrobial therapies due to various factors. The biofilm matrix sequesters bacterial cells from the exterior environment and therefore prevents antimicrobial agents from reaching the interior. In addition, biofilm surface extracellular polymeric substances can absorb antimicrobial agents and thus reduce their bioavailability. To conquer these protection mechanisms, liposomes have been developed into a drug delivery system for antimicrobial agents against biofilm-mediated infections. The unique characteristics of liposomes, including versatility for cargoes, target-specificity, nonimmunogenicity, low toxicity, and biofilm matrix-/cell membrane-fusogenicity, remarkably improve the effectiveness of antimicrobial agents and minimize recurrence of infections. This review summarizes current development of liposomal carriers for biofilm therapeutics, presents evidence in their practical applications and discusses their potential limitations.
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Affiliation(s)
- Y Wang
- School of Agriculture and Food Sciences, University of Queensland, St Lucia, Qld, Australia
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45
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Smith DM, Keller A. DNA Nanostructures in the Fight Against Infectious Diseases. ADVANCED NANOBIOMED RESEARCH 2021; 1:2000049. [PMID: 33615315 PMCID: PMC7883073 DOI: 10.1002/anbr.202000049] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 12/08/2020] [Indexed: 12/12/2022] Open
Abstract
Throughout history, humanity has been threatened by countless epidemic and pandemic outbreaks of infectious diseases, from the Justinianic Plague to the Spanish flu to COVID-19. While numerous antimicrobial and antiviral drugs have been developed over the last 200 years to face these threats, the globalized and highly connected world of the 21st century demands for an ever-increasing efficiency in the detection and treatment of infectious diseases. Consequently, the rapidly evolving field of nanomedicine has taken up the challenge and developed a plethora of strategies to fight infectious diseases with the help of various nanomaterials such as noble metal nanoparticles, liposomes, nanogels, and virus capsids. DNA nanotechnology represents a comparatively recent addition to the nanomedicine arsenal, which, over the past decade, has made great progress in the area of cancer diagnostics and therapy. However, the past few years have seen also an increasing number of DNA nanotechnology-related studies that particularly focus on the detection and inhibition of microbial and viral pathogens. Herein, a brief overview of this rather young research field is provided, successful concepts as well as potential challenges are identified, and promising directions for future research are highlighted.
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Affiliation(s)
- David M. Smith
- DNA Nanodevices UnitDepartment DiagnosticsFraunhofer Institute for Cell Therapy and Immunology IZI04103LeipzigGermany
- Peter Debye Institute for Soft Matter PhysicsFaculty of Physics and Earth SciencesUniversity of Leipzig04103LeipzigGermany
- Institute of Clinical ImmunologyUniversity of Leipzig Medical School04103LeipzigGermany
- Dhirubhai Ambani Institute of Information and Communication TechnologyGandhinagar382 007India
| | - Adrian Keller
- Technical and Macromolecular ChemistryPaderborn UniversityWarburger Str. 10033098PaderbornGermany
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Bhatia R, Gulati D, Sethi G. Biofilms and nanoparticles: applications in agriculture. Folia Microbiol (Praha) 2021; 66:159-170. [PMID: 33528768 DOI: 10.1007/s12223-021-00851-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 01/04/2021] [Indexed: 02/04/2023]
Abstract
A profound need to explore eco-friendly methods to practice sustainable agriculture leads to the research and exploration of plant growth-promoting rhizobacteria (PGPRs). Biofilms are assemblages of microbial communities within a self-secreted exopolymeric matrix, adhering to different biotic and abiotic surfaces and performing a variety of desired and undesired functions. Biofilm formation by PGPRs is governed by effective root colonization of the host plant in providing plant growth promotion and stress management. Biofilms can also provide a suitable environment for the synthesis and entrapment of nanoparticles. Together, nanoparticles and PGPRs may contribute towards biocontrol and crop management. This review discusses the significance of biofilms in agriculture and their confluence with different types of nanoparticles for plant protection and improved crop production.
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Affiliation(s)
- Ranjana Bhatia
- Department of Biotechnology, University Institute of Engineering and Technology, Panjab University, Chandigarh, 160014, India.
| | - Divij Gulati
- Department of Biotechnology, University Institute of Engineering and Technology, Panjab University, Chandigarh, 160014, India
| | - Gavin Sethi
- Department of Biotechnology, University Institute of Engineering and Technology, Panjab University, Chandigarh, 160014, India
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47
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Hydrodynamics and surface properties influence biofilm proliferation. Adv Colloid Interface Sci 2021; 288:102336. [PMID: 33421727 DOI: 10.1016/j.cis.2020.102336] [Citation(s) in RCA: 80] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 12/02/2020] [Accepted: 12/02/2020] [Indexed: 12/20/2022]
Abstract
A biofilm is an interface-associated colloidal dispersion of bacterial cells and excreted polymers in which microorganisms find protection from their environment. Successful colonization of a surface by a bacterial community is typically a detriment to human health and property. Insight into the biofilm life-cycle provides clues on how their proliferation can be suppressed. In this review, we follow a cell through the cycle of attachment, growth, and departure from a colony. Among the abundance of factors that guide the three phases, we focus on hydrodynamics and stratum properties due to the synergistic effect such properties have on bacteria rejection and removal. Cell motion, whether facilitated by the environment via medium flow or self-actuated by use of an appendage, drastically improves the survivability of a bacterium. Once in the vicinity of a stratum, a single cell is exposed to near-surface interactions, such as van der Waals, electrostatic and specific interactions, similarly to any other colloidal particle. The success of the attachment and the potential for detachment is heavily influenced by surface properties such as material type and topography. The growth of the colony is similarly guided by mainstream flow and the convective transport throughout the biofilm. Beyond the growth phase, hydrodynamic traction forces on a biofilm can elicit strongly non-linear viscoelastic responses from the biofilm soft matter. As the colony exhausts the means of survival at a particular location, a set of trigger signals activates mechanisms of bacterial release, a life-cycle phase also facilitated by fluid flow. A review of biofilm-relevant hydrodynamics and startum properties provides insight into future research avenues.
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48
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Squarcini A, Malgaretti P. Inhomogeneous surface tension of chemically active fluid interfaces. J Chem Phys 2020; 153:234903. [PMID: 33353340 DOI: 10.1063/5.0025989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study the dependence of the surface tension of a fluid interface on the density profile of a third suspended phase. By means of an approximated model for the binary mixture and of a perturbative approach, we derive closed-form expressions for the free energy of the system and for the surface tension of the interface. Our results show a remarkable non-monotonous dependence of the surface tension on the spatial separation between the peaks of the density of the suspended phase. Our results also predict the local value of the surface tension in the case in which the density of the suspended phase is not homogeneous along the interface.
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Affiliation(s)
- Alessio Squarcini
- Max-Planck-Institut für Intelligente Systeme, Heisenbergstr. 3, D-70569 Stuttgart, Germany
| | - Paolo Malgaretti
- Max-Planck-Institut für Intelligente Systeme, Heisenbergstr. 3, D-70569 Stuttgart, Germany
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49
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Mears R, Muntz I, Thijssen JHJ. Surface pressure of liquid interfaces laden with micron-sized particles. SOFT MATTER 2020; 16:9347-9356. [PMID: 32936200 DOI: 10.1039/d0sm01229g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We consider the surface pressure of a colloid-laden liquid interface. As micron-sized particles of suitable wettability can be irreversibly bound to the liquid interface on experimental timescales, we use the canonical ensemble to derive an expression for the surface pressure of a colloid-laden interface. We use this expression to show that adsorption of particles with only hard-core interactions has a negligible effect on surface pressures from typical Langmuir-trough measurements. Moreover, we show that Langmuir-trough measurements cannot be used to extract typical interparticle potentials. Finally, in the case of relatively weakly interacting sterically stabilized particles at a liquid interface, we argue that the dependence of measured surface pressure on surface fraction can be explained by particle coordination number at low to intermediate particle surface fractions. At high surface fractions, where the particles are jammed and cannot easily rearrange, we argue that contact-line sliding and/or deformations of the liquid interface at the length scale of the particles might play a pivotal role.
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Affiliation(s)
- Rudi Mears
- SUPA School of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3FD, Scotland, UK.
| | - Iain Muntz
- SUPA School of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3FD, Scotland, UK.
| | - Job H J Thijssen
- SUPA School of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3FD, Scotland, UK.
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50
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Shimabukuro M. Antibacterial Property and Biocompatibility of Silver, Copper, and Zinc in Titanium Dioxide Layers Incorporated by One-Step Micro-Arc Oxidation: A Review. Antibiotics (Basel) 2020; 9:E716. [PMID: 33092058 PMCID: PMC7589568 DOI: 10.3390/antibiotics9100716] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 10/16/2020] [Accepted: 10/19/2020] [Indexed: 02/07/2023] Open
Abstract
Titanium (Ti) and its alloys are commonly used in medical devices. However, biomaterial-associated infections such as peri-implantitis and prosthetic joint infections are devastating and threatening complications for patients, dentists, and orthopedists and are easily developed on titanium surfaces. Therefore, this review focuses on the formation of biofilms on implant surfaces, which is the main cause of infections, and one-step micro-arc oxidation (MAO) as a coating technology that can be expected to prevent infections due to the implant. Many researchers have provided sufficient data to prove the efficacy of MAO for preventing the initial stages of biofilm formation on implant surfaces. Silver (Ag), copper (Cu), and zinc (Zn) are well used and are incorporated into the Ti surface by MAO. In this review, the antibacterial properties, cytotoxicity, and durability of these elements on the Ti surface incorporated by one-step MAO will be summarized. This review is aimed at enhancing the importance of the quantitative control of Ag, Cu, and Zn for their use in implant surfaces and the significance of the biodegradation behavior of these elements for the development of antibacterial properties.
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Affiliation(s)
- Masaya Shimabukuro
- Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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