1
|
Hossain SI, Bajrami D, Altun N, Izzi M, Calvano CD, Sportelli MC, Gentile L, Picca RA, Gonzalez P, Mizaikoff B, Cioffi N. Development of super nanoantimicrobials combining AgCl, tetracycline and benzalkonium chloride. DISCOVER NANO 2024; 19:100. [PMID: 38861141 PMCID: PMC11166621 DOI: 10.1186/s11671-024-04043-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 06/04/2024] [Indexed: 06/12/2024]
Abstract
In this work, we demonstrate that a simple argentometric titration is a scalable, fast, green and robust approach for producing AgCl/antibiotic hybrid antimicrobial materials. We titrated AgNO3 into tetracycline hydrochloride (TCH) aqueous solution, thus forming AgCl/TCH in a one-step procedure. Furthermore, we investigated the one-pot synthesis of triply synergistic super-nanoantimicrobials, combining an inorganic source of Ag+ ions (AgCl), a disinfecting agent (benzyl-dimethyl-hexadecyl-ammonium chloride, BAC) and a molecular antibiotic (tetracycline hydrochloride, TCH). Conventional antimicrobial tests, industrial biofilm detection protocols, and in situ IR-ATR microbial biofilm monitoring, have been adapted to understand the performance of the synthesized super-nanoantimicrobial. The resulting hybrid AgCl/BAC/TCH nanoantimicrobials are found to be synergistically active in eradicating Salmonella enterica and Lentilactobacillus parabuchneri bacteria and biofilms. This study paves the way for the development of a new class of super-efficient nanoantimicrobials that combine relatively low amounts of multiple active species into a single (nano)formulation, thus preventing the development of antimicrobial resistance towards a single active principle.
Collapse
Affiliation(s)
- Syed Imdadul Hossain
- Chemistry Department, University of Bari Aldo Moro, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) c/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Diellza Bajrami
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert Einstein-Allee 11, 89081, Ulm, Germany
| | - Nazan Altun
- ASINCAR (Research Association of Meat Industries of Principado de Asturias), 33180, Noreña, Spain
| | - Margherita Izzi
- Chemistry Department, University of Bari Aldo Moro, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) c/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Cosima Damiana Calvano
- Chemistry Department, University of Bari Aldo Moro, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) c/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Maria Chiara Sportelli
- Chemistry Department, University of Bari Aldo Moro, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) c/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Luigi Gentile
- Chemistry Department, University of Bari Aldo Moro, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) c/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Rosaria Anna Picca
- Chemistry Department, University of Bari Aldo Moro, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) c/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Pelayo Gonzalez
- ASINCAR (Research Association of Meat Industries of Principado de Asturias), 33180, Noreña, Spain
| | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert Einstein-Allee 11, 89081, Ulm, Germany.
- Hahn-Schickard, Sedanstrasse 14, 89077, Ulm, Germany.
| | - Nicola Cioffi
- Chemistry Department, University of Bari Aldo Moro, Via E. Orabona, 4, 70126, Bari, Italy.
- CSGI (Center for Colloid and Surface Science) c/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy.
| |
Collapse
|
2
|
Maddeppungeng NM, Syahirah NA, Hidayati N, Rahman FUA, Mansjur KQ, Rieuwpassa IE, Setiawati D, Fadhlullah M, Aziz AYR, Salsabila A, Alsayed AR, Pamornpathomkul B, Permana AD, Hasyim R. Specific delivery of metronidazole using microparticles and thermosensitive in situ hydrogel for intrapocket administration as an alternative in periodontitis treatment. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2024:1-24. [PMID: 38769614 DOI: 10.1080/09205063.2024.2349414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 04/25/2024] [Indexed: 05/22/2024]
Abstract
Periodontitis is a common chronic inflammatory disease primarily caused by the prevalence of bacterial overgrowth resulting in the development of an inflammatory condition that destroys the tooth's supporting tissues and eventual tooth loss. Comparatively, to other treatment methods, it is difficult for topical antibacterial drugs to effectively permeate the biofilm's physical barrier, making conventional therapy for periodontitis more challenging. This novel study combines thermosensitive in situ hydrogel with microparticles (MPs) to enhance the targeted delivery of metronidazole (MET) to the periodontal pocket. Polycaprolactone (PCL) polymer was utilized to produce bacteria-sensitive MPs. Additionally, the study assessed the attributes of MPs and demonstrated an enhancement in the in vitro antibacterial efficacy of MPs towards Staphylococcus aureus (SA) and Escherichia coli (EC). Subsequently, we incorporated MET-MPs into thermosensitive in situ hydrogel formulations using chitosan. The optimized formulations exhibited stability, appropriate gelation temperature, mucoadhesive strength, and viscosity. In vitro permeation tests showed selective and prolonged drug release against SA and EC. Ex vivo experiments demonstrated no significant differences between in situ hydrogel containing pure MET and MET-MPs in biofilm quantity, bacterial counts, and metabolic activity in biofilms. According to in vitro tests and the effectiveness of the antibacterial activity, this study has exhibited a novel methodology for more efficacious therapies for periodontitis. This study aims to utilize MET in MPs to improve its effectiveness, enhance its antibacterial activity, and improve patient treatment outcomes. In further research, the efficacy of the treatment should be investigated in vivo using an appropriate animal model.
Collapse
Affiliation(s)
- Nurul Muhlisah Maddeppungeng
- Department of Pharmacy, Faculty of Medicine and Health Sciences, Alauddin Islamic State University, Samata Gowa, Indonesia
| | | | - Nasyrah Hidayati
- Department of Orthodontic, Faculty of Dentistry, Hasanuddin University, Makassar, Indonesia
| | - Fadhlil U A Rahman
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Hasanuddin University, Makassar, Indonesia
| | - Karima Qurnia Mansjur
- Department of Orthodontic, Faculty of Dentistry, Hasanuddin University, Makassar, Indonesia
| | - Irene E Rieuwpassa
- Department of Oral Biology, Faculty of Dentistry, Hasanuddin University, Makassar, Indonesia
| | - Dian Setiawati
- Department of Periodontology, Faculty of Dentistry, Hasanuddin University, Makassar, Indonesia
| | - Muhammad Fadhlullah
- Veterinary Paramedic Study Program, Faculty of Vocational Study, Hasanuddin University, Makassar, Indonesia
| | | | | | - Ahmad R Alsayed
- Department of Clinical Pharmacy and Therapeutics, Applied Science Private University, Amman, Jordan
| | | | | | - Rafikah Hasyim
- Department of Oral Biology, Faculty of Dentistry, Hasanuddin University, Makassar, Indonesia
| |
Collapse
|
3
|
Berto LA, Ettmayer JB, Stutzer D, Nietzsche S, Niederhauser T, Burger J, Sculean A, Eick S, Hofmann M. In-vitro effects of novel periodontal scalers with a planar ultrasonic piezoelectric transducer on periodontal biofilm removal, dentine surface roughness, and periodontal ligament fibroblasts adhesion. Clin Oral Investig 2024; 28:294. [PMID: 38698252 PMCID: PMC11065928 DOI: 10.1007/s00784-024-05671-w] [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: 12/11/2023] [Accepted: 04/21/2024] [Indexed: 05/05/2024]
Abstract
OBJECTIVES To compare ultrasonic scaler prototypes based on a planar piezoelectric transducer with different working frequencies featuring a titanium (Ti-20, Ti-28, and Ti-40) or stainless steel (SS-28) instrument, with a commercially available scaler (com-29) in terms of biofilm removal and reformation, dentine surface roughness and adhesion of periodontal fibroblasts. MATERIALS AND METHODS A periodontal multi-species biofilm was formed on specimens with dentine slices. Thereafter specimens were instrumented with scalers in a periodontal pocket model or left untreated (control). The remaining biofilms were quantified and allowed to reform on instrumented dentine slices. In addition, fibroblasts were seeded for attachment evaluation after 72 h of incubation. Dentine surface roughness was analyzed before and after instrumentation. RESULTS All tested instruments reduced the colony-forming unit (cfu) counts by about 3 to 4 log10 and the biofilm quantity (each p < 0.01 vs. control), but with no statistically significant difference between the instrumented groups. After 24-hour biofilm reformation, no differences in cfu counts were observed between any groups, but the biofilm quantity was about 50% in all instrumented groups compared to the control. The attachment of fibroblasts on instrumented dentine was significantly higher than on untreated dentine (p < 0.05), with the exception of Ti-20. The dentine surface roughness was not affected by any instrumentation. CONCLUSIONS The planar piezoelectric scaler prototypes are able to efficiently remove biofilm without dentine surface alterations, regardless of the operating frequency or instrument material. CLINICAL RELEVANCE Ultrasonic scalers based on a planar piezoelectric transducer might be an alternative to currently available ultrasonic scalers.
Collapse
Affiliation(s)
- Luciana Aranha Berto
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, Bern, CH-3010, Switzerland
| | - Johanna Blanda Ettmayer
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, Bern, CH-3010, Switzerland
| | - Diego Stutzer
- Institute for Human Centered Engineering, Bern University of Applied Sciences, Quellgasse 21, Biel, CH-2501, Switzerland
| | - Sandor Nietzsche
- Center of Electron Microscopy, University Hospital Jena, Ziegelmühlenweg 1, D-07743, Jena, Germany
| | - Thomas Niederhauser
- Institute for Human Centered Engineering, Bern University of Applied Sciences, Quellgasse 21, Biel, CH-2501, Switzerland
| | - Juergen Burger
- School of Biomedical and Precision Engineering, University of Bern, Gueterstrasse 24/26, Bern, CH-3008, Switzerland
| | - Anton Sculean
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, Bern, CH-3010, Switzerland
| | - Sigrun Eick
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, Bern, CH-3010, Switzerland.
| | - Martin Hofmann
- School of Biomedical and Precision Engineering, University of Bern, Gueterstrasse 24/26, Bern, CH-3008, Switzerland
| |
Collapse
|
4
|
Meliefste HM, Mudde SE, Ammerman NC, de Steenwinkel JEM, Bax HI. A laboratory perspective on Mycobacterium abscessus biofilm culture, characterization and drug activity testing. Front Microbiol 2024; 15:1392606. [PMID: 38690364 PMCID: PMC11058659 DOI: 10.3389/fmicb.2024.1392606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 04/03/2024] [Indexed: 05/02/2024] Open
Abstract
Mycobacterium abscessus is an emerging opportunistic pathogen causing severe pulmonary infections in patients with underlying lung disease and cystic fibrosis in particular. The rising prevalence of M. abscessus infections poses an alarming threat, as the success rates of available treatment options are limited. Central to this challenge is the absence of preclinical in vitro models that accurately mimic in vivo conditions and that can reliably predict treatment outcomes in patients. M. abscessus is notorious for its association with biofilm formation within the lung. Bacteria in biofilms are more recalcitrant to antibiotic treatment compared to planktonic bacteria, which likely contributes to the lack of correlation between preclinical drug activity testing (typically performed on planktonic bacteria) and treatment outcome. In recent years, there has been a growing interest in M. abscessus biofilm research. However, the absence of standardized methods for biofilm culture, biofilm characterization and drug activity testing has led to a wide spectrum of, sometimes inconsistent, findings across various studies. Factors such as strain selection, culture medium, and incubation time hugely impact biofilm development, phenotypical characteristics and antibiotic susceptibility. Additionally, a broad range of techniques are used to study M. abscessus biofilms, including quantification of colony-forming units, crystal violet staining and fluorescence microscopy. Yet, limitations of these techniques and the selected readouts for analysis affect study outcomes. Currently, research on the activity of conventional antibiotics, such as clarithromycin and amikacin, against M. abscessus biofilms yield ambiguous results, underscoring the substantial impact of experimental conditions on drug activity assessment. Beyond traditional drug activity testing, the exploration of novel anti-biofilm compounds and the improvement of in vitro biofilm models are ongoing. In this review, we outline the laboratory models, experimental variables and techniques that are used to study M. abscessus biofilms. We elaborate on the current insights of M. abscessus biofilm characteristics and describe the present understanding of the activity of traditional antibiotics, as well as potential novel compounds, against M. abscessus biofilms. Ultimately, this work contributes to the advancement of fundamental knowledge and practical applications of accurate preclinical M. abscessus models, thereby facilitating progress towards improved therapies for M. abscessus infections.
Collapse
Affiliation(s)
| | - Saskia Emily Mudde
- Department of Medical Microbiology and Infectious Diseases, Erasmus University Medical Center, Rotterdam, Netherlands
| | - Nicole Christine Ammerman
- Department of Medical Microbiology and Infectious Diseases, Erasmus University Medical Center, Rotterdam, Netherlands
| | | | - Hannelore Iris Bax
- Department of Medical Microbiology and Infectious Diseases, Erasmus University Medical Center, Rotterdam, Netherlands
- Department of Internal Medicine, Section of Infectious Diseases, Erasmus University Medical Center, Rotterdam, Netherlands
| |
Collapse
|
5
|
Gricajeva A, Buchovec I, Kalėdienė L, Badokas K, Vitta P. Evaluation of visible light and natural photosensitizers against Staphylococcus epidermidis and Staphylococcus saprophyticus planktonic cells and biofilm. Heliyon 2024; 10:e28811. [PMID: 38596007 PMCID: PMC11002230 DOI: 10.1016/j.heliyon.2024.e28811] [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: 11/08/2023] [Revised: 03/21/2024] [Accepted: 03/25/2024] [Indexed: 04/11/2024] Open
Abstract
Antimicrobial photoinactivation (API) has shown some promise in potentially treating different nosocomial bacterial infections, however, its application on staphylococci, especially other than Staphylococcus aureus or methicillin-resistant S. aureus (MRSA) species is still limited. Although S. aureus is a well-known and important nosocomial pathogen, several other species of the genus, particularly coagulase-negative Staphylococcus (CNS) species such as Staphylococcus epidermidis and Staphylococcus saprophyticus, can also cause healthcare-associated infections and foodborne intoxications. CNS are often involved in resilient biofilm formation on medical devices and can cause infections in patients with compromised immune systems or those undergoing invasive procedures. In this study, the effects of chlorophyllin and riboflavin-mediated API on S. epidermidis and S. saprophyticus planktonic cells and biofilm are demonstrated for the first time. Based on the residual growth determination and metabolic reduction ability changes, higher inactivating efficiency of chlorophyllin-mediated API was determined against the planktonic cells of both tested species of bacteria and against S. saprophyticus biofilm. Some insights on whether aqueous solutions of riboflavin and chlorophyllin, when illuminated with optimal exciting wavelength (440 nm and 402 nm, respectively) generate O2-•, are also provided in this work.
Collapse
Affiliation(s)
- Alisa Gricajeva
- Institute of Biosciences, Department of Microbiology and Biotechnology, Life Sciences Center, Vilnius University, Sauletekio avenue 7, LT-10257, Vilnius, Lithuania
| | - Irina Buchovec
- Institute of Photonics and Nanotechnology, Faculty of Physics, Sauletekio avenue 3, LT-10257, Vilnius University, Vilnius, Lithuania
| | - Lilija Kalėdienė
- Institute of Biosciences, Department of Microbiology and Biotechnology, Life Sciences Center, Vilnius University, Sauletekio avenue 7, LT-10257, Vilnius, Lithuania
| | - Kazimieras Badokas
- Institute of Photonics and Nanotechnology, Faculty of Physics, Sauletekio avenue 3, LT-10257, Vilnius University, Vilnius, Lithuania
| | - Pranciškus Vitta
- Institute of Photonics and Nanotechnology, Faculty of Physics, Sauletekio avenue 3, LT-10257, Vilnius University, Vilnius, Lithuania
| |
Collapse
|
6
|
Irani D, Jungbauer G, Sculean A, Eick S. Effect of sodium hypochlorite gel on bacteria associated with periodontal disease. Clin Oral Investig 2024; 28:190. [PMID: 38430333 PMCID: PMC10908609 DOI: 10.1007/s00784-023-05446-9] [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: 07/13/2023] [Accepted: 12/17/2023] [Indexed: 03/03/2024]
Abstract
OBJECTIVES An adjunct in non-surgical periodontal therapy might be sodium hypochlorite (NaOCl)-based agents. The purpose of the present in vitro study was to get deeper knowledge on the influence of different parameters as time after mixing, pH, and chemical composition of an amino acid 0.475% NaOCl (AA-NaOCl) gel consisting of two components on its anti-biofilm activity. MATERIALS AND METHODS Six-species biofilms were cultured for 5 days, before AA-NaOCl gel was applied. In the different series, the influence of the time after mixing of the two components before application, of the concentration of NaOCl in the gel mixture, of the pH of the gel mixture, and of an exchange of the amino acid component by hyaluronic acid (HA), was analyzed. RESULTS Mixing time point experiments showed that the AA-NaOCl gel is capable of statistically significantly reducing colony-forming unit (cfu) counts up to 30 min after mixing, but only up to 20 min after mixing the reduction was more than 2 log10 cfu. The pH experiments indicate that a reduced pH results in a reduced activity of the NaOCl formulation. NaOCl concentrations in the formulation in the range from 0.475 to 0.2% provide adequate activity on biofilms. A HA/NaOCl gel was equally active against the biofilm as the AA-NaOCl gel. CONCLUSION Mixing of the components should be made in a timeframe of 20 min before applications. An optimization of the composition of the NaOCl formulation might be possible and should be a topic in further in vitro studies. CLINICAL RELEVANCE The AA-NaOCl gel formulation can be mixed up to 20 min before application. Further, the study indicates that the composition of the NaOCl gel formulation can be optimized.
Collapse
Affiliation(s)
- Delia Irani
- School of Dentistry, Department of Periodontology, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland
| | - Gert Jungbauer
- School of Dentistry, Department of Periodontology, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland
| | - Anton Sculean
- School of Dentistry, Department of Periodontology, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland
| | - Sigrun Eick
- School of Dentistry, Department of Periodontology, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland.
| |
Collapse
|
7
|
Bajrami D, Hossain SI, Barbarossa A, Sportelli MC, Picca RA, Gentile L, Mastrolonardo F, Rosato A, Carocci A, Colabufo NA, Mizaikoff B, Cioffi N. A scalable route to quaternary ammonium-functionalized AgCl colloidal antimicrobials inhibiting food pathogenic bacteria and biofilms. Heliyon 2024; 10:e25260. [PMID: 38327442 PMCID: PMC10847915 DOI: 10.1016/j.heliyon.2024.e25260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 01/18/2024] [Accepted: 01/23/2024] [Indexed: 02/09/2024] Open
Abstract
This study explores how a simple argentometric titration-like approach could be evolved into a versatile, scalable, fast, and robust strategy for the production of AgCl/quaternary ammonium compounds (QACs) colloidal nanoantimicrobials (NAMs). These systems, which are green, stable, cost-effective, and reproducible are found to be effective against a wide range of food pathogenic bacteria and biofilms. The option of a large-scale production for such colloidal suspensions was explored via the use of a peristaltic pump. The utilization of various types of biosafe QACs and a wide range of solvents including aqueous and organic ones renders this system green and versatile. Nanocolloids (NCs) were characterized using UV-Vis, X-ray photoelectron and Fourier transform infrared (FTIR) spectroscopies. Their morphology and crystalline nature were investigated by transmission electron microscopy (TEM) and selected area diffraction pattern (SAED). Nanoparticle (NP) size distribution and hydrodynamic radius were measured by dynamic light scattering (DLS), while the ζ-potential was found to be highly positive, thus indicating significant colloidal stability and antimicrobial activity. In fact, the higher the NP surface charge, the stronger was their bioactivity. Furthermore, the antibacterial and antibiofilm effects of the as-prepared NCs were tested against Gram-positive bacteria, such as Staphylococcus aureus (ATCC 29213) and Listeria monocytogenes 46, and Gram-negative bacteria, such as Escherichia coli (ATCC 25922) and Pseudomonas aeruginosa (ATCC 27853). The results clearly indicate that AgCl/QACs provide pronounced antibiofilm activity with long-term bacteriostatic effects against foodborne pathogenic bacteria rendering them an ideal choice for active food packaging systems.
Collapse
Affiliation(s)
- Diellza Bajrami
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert Einstein-Allee 11, 89081, Ulm, Germany
| | - Syed Imdadul Hossain
- Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) C/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Alexia Barbarossa
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, 70126, Bari, Italy
| | - Maria Chiara Sportelli
- Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) C/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Rosaria Anna Picca
- Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) C/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Luigi Gentile
- Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) C/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | | | - Antonio Rosato
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, 70126, Bari, Italy
| | - Alessia Carocci
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, 70126, Bari, Italy
| | - Nicola Antonio Colabufo
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, 70126, Bari, Italy
- Biofordrug Srl, University of Bari “Aldo Moro”, Via Dante 95, 70019, Triggiano, Bari, Italy
| | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert Einstein-Allee 11, 89081, Ulm, Germany
- Hahn-Schickard, Sedanstrasse 14, 89077, Ulm, Germany
| | - Nicola Cioffi
- Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) C/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| |
Collapse
|
8
|
Heine N, Doll-Nikutta K, Stein F, Jakobi J, Ingendoh-Tsakmakidis A, Rehbock C, Winkel A, Barcikowski S, Stiesch M. Anti-biofilm properties of laser-synthesized, ultrapure silver-gold-alloy nanoparticles against Staphylococcus aureus. Sci Rep 2024; 14:3405. [PMID: 38336925 PMCID: PMC10858226 DOI: 10.1038/s41598-024-53782-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: 09/08/2023] [Accepted: 02/05/2024] [Indexed: 02/12/2024] Open
Abstract
Staphylococcus aureus biofilm-associated infections are a common complication in modern medicine. Due to inherent resilience of biofilms to antibiotics and the rising number of antibiotic-resistant bacterial strains, new treatment options are required. For this purpose, ultrapure, spherical silver-gold-alloy nanoparticles with homogenous elemental distribution were synthesized by laser ablation in liquids and analyzed for their antibacterial activity on different stages of S. aureus biofilm formation as well as for different viability parameters. First, the effect of nanoparticles against planktonic bacteria was tested with metabolic activity measurements. Next, nanoparticles were incubated with differently matured S. aureus biofilms, which were then analyzed by metabolic activity measurements and three dimensional live/dead fluorescent staining to determine biofilm volume and membrane integrity. It could be shown that AgAu NPs exhibit antibacterial properties against planktonic bacteria but also against early-stage and even mature biofilms, with a complete diffusion through the biofilm matrix. Furthermore, AgAu NPs primarily targeted metabolic activity, to a smaller extend membrane integrity, but not the biofilm volume. Additional molecular analyses using qRT-PCR confirmed the influence on different metabolic pathways, like glycolysis, stress response and biofilm formation. As this shows clear similarities to the mechanism of pure silver ions, the results strengthen silver ions to be the major antibacterial agent of the synthesized nanoparticles. In summary, the results of this study provide initial evidence of promising anti-biofilm characteristics of silver-gold-alloy nanoparticles and support the importance of further translation-oriented analyses in the future.
Collapse
Affiliation(s)
- Nils Heine
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany.
- Lower Saxony Centre of Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany.
| | - Katharina Doll-Nikutta
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
- Lower Saxony Centre of Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany
| | - Frederic Stein
- Technical Chemistry I, University of Duisburg Essen, Universitaetsstr. 7, 45141, Essen, Germany
| | - Jurij Jakobi
- Technical Chemistry I, University of Duisburg Essen, Universitaetsstr. 7, 45141, Essen, Germany
| | - Alexandra Ingendoh-Tsakmakidis
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
- Lower Saxony Centre of Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany
| | - Christoph Rehbock
- Technical Chemistry I, University of Duisburg Essen, Universitaetsstr. 7, 45141, Essen, Germany
| | - Andreas Winkel
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
- Lower Saxony Centre of Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany
| | - Stephan Barcikowski
- Technical Chemistry I, University of Duisburg Essen, Universitaetsstr. 7, 45141, Essen, Germany
| | - Meike Stiesch
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany.
- Lower Saxony Centre of Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany.
| |
Collapse
|
9
|
Zhang J, Tan YM, Li SR, Battini N, Zhang SL, Lin JM, Zhou CH. Discovery of benzopyridone cyanoacetates as new type of potential broad-spectrum antibacterial candidates. Eur J Med Chem 2024; 265:116107. [PMID: 38171147 DOI: 10.1016/j.ejmech.2023.116107] [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: 11/23/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/05/2024]
Abstract
Unique benzopyridone cyanoacetates (BCs) as new type of promising broad-spectrum antibacterial candidates were discovered with large potential to combat the lethal multidrug-resistant bacterial infections. Many prepared BCs showed broad antibacterial spectrum with low MIC values against the tested strains. Some highly active BCs exhibited rapid sterilization capacity, low resistant trend and good predictive pharmacokinetic properties. Furthermore, the highly active sodium BCs (NaBCs) displayed low hemolysis and cytotoxicity, and especially octyl NaBC 5g also showed in vivo potent anti-infective potential and appreciable pharmacokinetic profiles. A series of preliminary mechanistic explorations indicated that these active BCs could effectively eliminate bacterial biofilm and destroy membrane integrity, thus resulting in the leakage of bacterial cytoplasm. Moreover, their unique structures might further bind to intracellular DNA, DNA gyrase and topoisomerase IV through various direct noncovalent interactions to hinder bacterial reproduction. Meanwhile, the active BCs also induced bacterial oxidative stress and metabolic disturbance, thereby accelerating bacterial apoptosis. These results provided a bright hope for benzopyridone cyanoacetates as potential novel multitargeting broad-spectrum antibacterial candidates to conquer drug resistance.
Collapse
Affiliation(s)
- Jing Zhang
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Yi-Min Tan
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Shu-Rui Li
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Narsaiah Battini
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Shao-Lin Zhang
- School of Pharmaceutical Sciences, Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Chongqing University, Chongqing, 401331, China.
| | - Jian-Mei Lin
- Department of Infections, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China.
| | - Cheng-He Zhou
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China.
| |
Collapse
|
10
|
Du C, Woolcott S, Wahba AS, Hamry SR, Odette WL, Thibodeaux CJ, Marchand P, Mauzeroll J. Evaluation of Quatsome Morphology, Composition, and Stability for Pseudomonas aeruginosa Biofilm Eradication. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1623-1632. [PMID: 38194503 DOI: 10.1021/acs.langmuir.3c02491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
Biofilm infections are a major cause of food poisoning and hospital-acquired infections. Quaternary ammonium compounds are a group of effective disinfectants widely used in industry and households, yet their efficacy is lessened when used as antibiofilm agents compared to that against planktonic bacteria. It is therefore necessary to identify alternative formulations of quaternary ammonium compounds to achieve an effective biofilm dispersal. Quaternary ammonium amphiphiles can form vesicular structures termed "quatsomes" in the presence of cholesterol. In addition to their intrinsic antimicrobial properties, quatsomes can also be used for the delivery of other types of antibiotics or biomarkers. In this study, quatsomes were prepared from binary mixtures of cholesterol and mono- or dialkyl-quaternary ammonium compounds; then, the integrity and stability of their vesicular structure were assessed and related to monomer chain number and chain length. The quatsomes were used to treat Pseudomonas aeruginosa biofilms, showing effective antibiofilm abilities comparable to those of their monomers. A systematic liquid chromatography-mass spectrometry method for quantifying quatsome vesicle components was also developed and used to establish the significance of cholesterol in the quatsome self-assembly processes.
Collapse
Affiliation(s)
- Changyue Du
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| | - Sascha Woolcott
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| | | | - Sally R Hamry
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| | - William L Odette
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| | | | - Patrick Marchand
- Sani-Marc Group, 42 Rue De L'Artisan, Victoriaville, Quebec G6P 7E3, Canada
| | - Janine Mauzeroll
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| |
Collapse
|
11
|
Liu X, Wang Z, You Z, Wang W, Wang Y, Wu W, Peng Y, Zhang S, Yun Y, Zhang J. Transcriptomic analysis of cell envelope inhibition by prodigiosin in methicillin-resistant Staphylococcus aureus. Front Microbiol 2024; 15:1333526. [PMID: 38318338 PMCID: PMC10839101 DOI: 10.3389/fmicb.2024.1333526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 01/03/2024] [Indexed: 02/07/2024] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a leading threat to public health as it is resistant to most currently available antibiotics. Prodigiosin is a secondary metabolite of microorganisms with broad-spectrum antibacterial activity. This study identified a significant antibacterial effect of prodigiosin against MRSA with a minimum inhibitory concentration as low as 2.5 mg/L. The results of scanning electron microscopy, crystal violet staining, and confocal laser scanning microscopy indicated that prodigiosin inhibited biofilm formation in S. aureus USA300, while also destroying the structure of the cell wall and cell membrane, which was confirmed by transmission electron microscopy. At a prodigiosin concentration of 1.25 mg/L, biofilm formation was inhibited by 76.24%, while 2.5 mg/L prodigiosin significantly reduced the vitality of MRSA cells in the biofilm. Furthermore, the transcriptomic results obtained at 1/8 MIC of prodigiosin indicated that 235and 387 genes of S. aureus USA300 were significantly up- and downregulated, respectively. The downregulated genes were related to two-component systems, including the transcriptional regulator LytS, quorum sensing histidine kinases SrrB, NreA and NreB, peptidoglycan biosynthesis enzymes (MurQ and GlmU), iron-sulfur cluster repair protein ScdA, microbial surface components recognizing adaptive matrix molecules, as well as the key arginine synthesis enzymes ArcC and ArgF. The upregulated genes were mainly related to cell wall biosynthesis, as well as two-component systems including vancomycin resistance-associated regulator, lipoteichoic acid biosynthesis related proteins DltD and DltB, as well as the 9 capsular polysaccharide biosynthesis proteins. This study elucidated the molecular mechanisms through which prodigiosin affects the cell envelope of MRSA from the perspectives of cell wall synthesis, cell membrane and biofilm formation, providing new potential targets for the development of antimicrobials for the treatment of MRSA.
Collapse
Affiliation(s)
- Xiaoxia Liu
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, China
| | - Zonglin Wang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, China
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, China
| | - Zhongyu You
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, China
| | - Wei Wang
- Clinical Laboratory of First Hospital of Jiaxing, Jiaxing, China
| | - Yujie Wang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, China
| | - Wenjing Wu
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, China
| | - Yongjia Peng
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, China
| | - Suping Zhang
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, China
| | - Yinan Yun
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, China
| | - Jin Zhang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, China
| |
Collapse
|
12
|
Mirahmad A, Hafez Ghoran S, Alipour P, Taktaz F, Hassan S, Naderian M, Moradalipour A, Faizi M, Kobarfard F, Ayatollahi SA. Oliveria decumbens Vent. (Apiaceae): Biological screening and chemical compositions. JOURNAL OF ETHNOPHARMACOLOGY 2024; 318:117053. [PMID: 37595813 DOI: 10.1016/j.jep.2023.117053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/02/2023] [Accepted: 08/14/2023] [Indexed: 08/20/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Oliveria decumbens Vent. (Apiaceae), a single aromatic species in Iran, is traditionally used for healing inflammation, gastrointestinal disorders, and infections. AIM OF THE STUDY Regarding the importance of O. decumbens in traditional medicine, we aimed to set out the plant's biological screening and analyze the chemical components of the active fractions. MATERIALS AND METHODS Air-dried O. decumbens aerial parts were macerated by ethanol:water (70:30). Using a liquid-liquid extraction (LLE) technique, n-hexane, dichloromethane (DCM), ethyl acetate (EtOAc), n-butanol (n-BuOH), and water were successively used to fractionate the crude extract into different portions. Various biological activities were performed on the crude extract, fractions, and some experiments on pure compounds. The bioassays were as follows: antibacterial activity against Staphylococcus aureus, Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa, and Salmonella typhi (using microplate alamar blue assay; MABA), antifungal activity against Aspergillus niger, A. fumigatus, Candida albicans, C. glabarate, Fusarium lini, Microspurum canis, and Trichophyton rubrum (using agar tube dilution method), antileishmanial activity against Leishmania major and L. tropica using a 96-well serial dilution protocol, anti-inflammatory activity using the respiratory burst assay, cytotoxicity against HeLa (cervical cancer) and BJ (normal fibroblast) cells using MTT assay, insecticidal activity against Tribolium castaneum, Sitophilus oryzae, and Rhyzopertha dominica (using the contact toxicity method), larvicidal activity against Aedes aegypti, anti-DPPH• activity, and cytotoxicity against brine shrimp (Artemia salina) in a lethality assay. Eventually, the phytochemicals from the active fractions were studied by gas chromatography coupled with mass spectrometry (GC-MS). RESULTS Interestingly, the DCM fraction was the most active, followed by the n-hexane fraction in the biological assays, including antibacterial (>80% inhibition), leishmanicidal (IC50 (L.major) = 29.4 μg/mL, and IC50 (L.tropica) = 30.0 μg/mL), anti-inflammatory (IC50 = 15.8 μg/mL), insecticidal (>80% inhibition), and larvicidal (100% inhibition of A. aegypti) assays. Further GC-MS analysis of the DCM and n-hexane fractions resulted in the characterization of 12 and 14 phytoconstituents, respectively, compared with the NIST library. Thymol and carvacrol were abundant in both fractions. To lesser quantities, the presence of monoterpenoids (p-cymen-8-ol, thymoquinone, 3-hydroxy-β-damascone, and 3-hydroxy-7,8-dihydro-β-ionol), phenylpropanoids (methoxyeugenol, elemicin, and 4-[(1E)-3-hydroxy-1-propenyl]-2-methoxyphanol, simple phenolics (salicylic acid and 4-methoxy-2,3,6-trimethyl-phenol), and a coumarin (6,7-dimethoxy-coumarin) were detected in the DCM fraction. On the other hand, besides a coumarin and monoterpenoids, the fatty acids (tetradecanoid acid, n-hexadecanoic acid, and linolenic acid) and a sesquiterpene (spathulenol) were observed in the n-hexane fraction. The EtOAc fraction scavenged the DPPH• radicals better than other fractions (IC50 = 41.4 μg/mL), while in brine shrimp lethality assay, the crude extract was more active than n-hexane and DCM fractions with LD50 = 385.20, 660.28, and 699.74 μg/mL, respectively. Surprisingly, the crude extract and fractions were ineffective against assayed fungal strains and tested cancer and non-cancer cell lines. CONCLUSIONS Our findings showed that O. decumbens deserves to be a multi-bioactive medicinal plant, besides its ability for cereal protection against pests. To understand the principal mechanism of action, in silico, in vitro, and in vivo experiments may clarify the ambiguities and even figure out the synergistic behavior of the minor secondary metabolites.
Collapse
Affiliation(s)
- Arezoo Mirahmad
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, 16666-63111, Tehran, Iran; Department of Pharmacognosy, School of Pharmacy, Shahid Beheshti University of Medical Sciences, 16666-63111, Tehran, Iran.
| | - Salar Hafez Ghoran
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, 16666-63111, Tehran, Iran; H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan.
| | - Pouya Alipour
- Department of Biology, Faculty of Basic Sciences, University of Maragheh, Maragheh, Iran.
| | - Fatemeh Taktaz
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, 16666-63111, Tehran, Iran; Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Naples, Italy.
| | - Sohail Hassan
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy & Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan.
| | - Moslem Naderian
- Department of Pharmacognosy, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Asma Moradalipour
- Department of Animal Sciences, Faculty of Agriculture, Yasouj University, Yasouj, Iran.
| | - Mehrdad Faizi
- Department of Pharmacology and Toxicology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, 16666-63111, Tehran, Iran.
| | - Farzad Kobarfard
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, 16666-63111, Tehran, Iran; Department of Medicinal Chemistry, School of Pharmacy, Shahid Beheshti University of Medical Sciences, 16666-63111, Tehran, Iran.
| | - Seyed Abdulmajid Ayatollahi
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, 16666-63111, Tehran, Iran; Department of Pharmacognosy, School of Pharmacy, Shahid Beheshti University of Medical Sciences, 16666-63111, Tehran, Iran.
| |
Collapse
|
13
|
Coenye T. Biofilm antimicrobial susceptibility testing: where are we and where could we be going? Clin Microbiol Rev 2023; 36:e0002423. [PMID: 37812003 PMCID: PMC10732061 DOI: 10.1128/cmr.00024-23] [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: 03/21/2023] [Accepted: 07/27/2023] [Indexed: 10/10/2023] Open
Abstract
Our knowledge about the fundamental aspects of biofilm biology, including the mechanisms behind the reduced antimicrobial susceptibility of biofilms, has increased drastically over the last decades. However, this knowledge has so far not been translated into major changes in clinical practice. While the biofilm concept is increasingly on the radar of clinical microbiologists, physicians, and healthcare professionals in general, the standardized tools to study biofilms in the clinical microbiology laboratory are still lacking; one area in which this is particularly obvious is that of antimicrobial susceptibility testing (AST). It is generally accepted that the biofilm lifestyle has a tremendous impact on antibiotic susceptibility, yet AST is typically still carried out with planktonic cells. On top of that, the microenvironment at the site of infection is an important driver for microbial physiology and hence susceptibility; but this is poorly reflected in current AST methods. The goal of this review is to provide an overview of the state of the art concerning biofilm AST and highlight the knowledge gaps in this area. Subsequently, potential ways to improve biofilm-based AST will be discussed. Finally, bottlenecks currently preventing the use of biofilm AST in clinical practice, as well as the steps needed to get past these bottlenecks, will be discussed.
Collapse
Affiliation(s)
- Tom Coenye
- Laboratory of Pharmaceutical Microbiology, Ghent University, Ghent, Belgium
| |
Collapse
|
14
|
Zehra M, Usmani Y, Shafiq J, Khan A, Zafar M, Raza Mirza M, Shah SR, Al-Harrasi A, Hasan SM, Farooqui A, Ahmed A. In vitro and in vivo antimicrobial potential of lithium complex against multi-drug resistant Acinetobacter baumannii. Microbiol Spectr 2023; 11:e0193023. [PMID: 37861330 PMCID: PMC10715101 DOI: 10.1128/spectrum.01930-23] [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: 05/20/2023] [Accepted: 09/12/2023] [Indexed: 10/21/2023] Open
Abstract
IMPORTANCE Multi-drug resistance (MDR) by virtue of evolving resistance and virulence mechanisms among A. baumannii is a global concern which is responsible for lethal hospital-acquired infections. Therefore, it is crucial to develop new therapeutics against it. Metal complexes are compact structures with diverse mechanisms that the pathogens cannot evade easily which make them a strong drug candidate. In this study, we assessed the in vitro and in vivo efficacy of lithium complex {[Li(phen)2 sal]} against biofilm-forming MDR A. baumannii. The lithium complex displayed strong antimicrobial activity and reduced the pre-formed mature biofilm which is key barrier for antimicrobial action. Moreover, it employs oxidative stress as one of its mode of actions and causes cellular rupturing. Lithium complex was non-toxic and was significantly effective to overcome pneumonia in mice model. These results highlight the untapped potential of metal complexes that can be explored and utilized for combating notorious A. baumannii infections.
Collapse
Affiliation(s)
- Moatter Zehra
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Yamina Usmani
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Jazib Shafiq
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Ajmal Khan
- Natural and Medical Science Research Center, University of Nizwa, Birkat Almouz, Oman
| | - Muneeza Zafar
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Munazza Raza Mirza
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Syed Raza Shah
- Natural and Medical Science Research Center, University of Nizwa, Birkat Almouz, Oman
| | - Ahmed Al-Harrasi
- Natural and Medical Science Research Center, University of Nizwa, Birkat Almouz, Oman
| | - Syed Mehmood Hasan
- Department of Pathology, Jinnah Sindh Medical University, Karachi, Pakistan
| | - Amber Farooqui
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
- Translational Medicine Program, The Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Ayaz Ahmed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| |
Collapse
|
15
|
Houtak G, Bouras G, Nepal R, Shaghayegh G, Cooksley C, Psaltis AJ, Wormald PJ, Vreugde S. The intra-host evolutionary landscape and pathoadaptation of persistent Staphylococcus aureus in chronic rhinosinusitis. Microb Genom 2023; 9. [PMID: 38010322 DOI: 10.1099/mgen.0.001128] [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: 11/29/2023] Open
Abstract
Chronic rhinosinusitis (CRS) is a common chronic sinonasal mucosal inflammation associated with Staphylococcus aureus biofilm and relapsing infections. This study aimed to determine rates of S. aureus persistence and pathoadaptation in CRS patients by investigating the genomic relatedness and antibiotic resistance/tolerance in longitudinally collected S. aureus clinical isolates. A total of 68 S. aureus paired isolates (34 pairs) were sourced from 34 CRS patients at least 6 months apart. Isolates were grown into 48 h biofilms and tested for tolerance to antibiotics. A hybrid sequencing strategy was used to obtain high-quality reference-grade assemblies of all isolates. Single nucleotide variants (SNV) divergence in the core genome and sequence type clustering were used to analyse the relatedness of the isolate pairs. Single nucleotide and structural genome variations, plasmid similarity, and plasmid copy numbers between pairs were examined. Our analysis revealed that 41 % (14/34 pairs) of S. aureus isolates were persistent, while 59 % (20/34 pairs) were non-persistent. Persistent isolates showed episode-specific mutational changes over time with a bias towards events in genes involved in adhesion to the host and mobile genetic elements such as plasmids, prophages, and insertion sequences. Furthermore, a significant increase in the copy number of conserved plasmids of persistent strains was observed. This was accompanied by a significant increase in biofilm tolerance against all tested antibiotics, which was linked to a significant increase in biofilm biomass over time, indicating a potential biofilm pathoadaptive process in persistent isolates. In conclusion, our study provides important insights into the mutational changes during S. aureus persistence in CRS patients highlighting potential pathoadaptive mechanisms in S. aureus persistent isolates culminating in increased biofilm biomass.
Collapse
Affiliation(s)
- Ghais Houtak
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- The Department of Surgery - Otolaryngology Head and Neck Surgery, University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Adelaide, Australia
| | - George Bouras
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- The Department of Surgery - Otolaryngology Head and Neck Surgery, University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Adelaide, Australia
| | - Roshan Nepal
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- The Department of Surgery - Otolaryngology Head and Neck Surgery, University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Adelaide, Australia
| | - Gohar Shaghayegh
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- The Department of Surgery - Otolaryngology Head and Neck Surgery, University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Adelaide, Australia
| | - Clare Cooksley
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- The Department of Surgery - Otolaryngology Head and Neck Surgery, University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Adelaide, Australia
| | - Alkis James Psaltis
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- The Department of Surgery - Otolaryngology Head and Neck Surgery, University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Adelaide, Australia
| | - Peter-John Wormald
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- The Department of Surgery - Otolaryngology Head and Neck Surgery, University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Adelaide, Australia
| | - Sarah Vreugde
- Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia
- The Department of Surgery - Otolaryngology Head and Neck Surgery, University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Adelaide, Australia
| |
Collapse
|
16
|
Hernando-Gozalo M, Aguilera-Correa JJ, Rescalvo-Casas C, Seijas-Pereda L, García-Bertolín C, de la Mata FJ, Sánchez-Nieves J, Cuadros J, Pérez-Tanoira R. Study of the antimicrobial activity of cationic carbosilane dendrimers against clinical strains of multidrug-resistant bacteria and their biofilms. Front Cell Infect Microbiol 2023; 13:1203991. [PMID: 37886663 PMCID: PMC10598583 DOI: 10.3389/fcimb.2023.1203991] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 09/20/2023] [Indexed: 10/28/2023] Open
Abstract
Introduction Antimicrobial Resistance is a serious public health problem, which is aggravated by the ability of the microorganisms to form biofilms. Therefore, new therapeutic strategies need to be found, one of them being the use of cationic dendritic systems (dendrimers and dendrons). Methods The aim of this study is to analyze the in vitro antimicrobial efficacy of six cationic carbosilane (CBS) dendrimers and one dendron with peripheral ammonium groups against multidrug-resistant bacteria, some of them isolated hospital strains, and their biofilms. For this purpose, minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), minimum biofilm inhibitory concentration (MBIC) and minimum eradication biofilm concentration (MBEC) studies were carried out. In addition, the cytotoxicity on Hela cells of those compounds that proved to be the most effective was analyzed. Results All the tested compounds showed in vitro activity against the planktonic forms of methicillin-resistant Staphylococcus aureus and only the dendrimers BDSQ017, BDAC-001 and BDLS-001 and the dendron BDEF-130 against their biofilms. On the other hand, only the dendrimers BDAC 001, BDLS-001 and BDJS-049 and the dendron BDEF-130 were antibacterial in vitro against the planktonic forms of multidrug-resistant Pseudomonas aeruginosa, but they lacked activity against their preformed biofilms. In addition, the dendrimers BDAC-001, BDLS-001 and BDSQ-017 and the dendron BDEF-130 exhibited a good profile of cytotoxicity in vitro. Discussion Our study demonstrates the possibility of using the four compounds mentioned above as possible topical antimicrobials against the clinical and reference strains of multidrug-resistant bacteria.
Collapse
Affiliation(s)
- Marcos Hernando-Gozalo
- University of Alcalá, Department of Organic and Inorganic Chemistry, Research Institute in Chemistry “Andrés M. del Río” (IQAR), Madrid, Spain
| | - John Jairo Aguilera-Correa
- Clinical Microbiology Department, Instituto de Investigación Sanitaria (IIS)-Fundacion Jimenez Diaz-Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Carlos Rescalvo-Casas
- University of Alcalá, Department of Biomedicine and Biotechnology, Faculty of Medicine, Madrid, Spain
| | - Laura Seijas-Pereda
- University of Alcalá, Department of Biomedicine and Biotechnology, Faculty of Medicine, Madrid, Spain
- Clinical Microbiology Department, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Spain
| | - Carlos García-Bertolín
- Clinical Microbiology Department, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Spain
| | - Francisco Javier de la Mata
- University of Alcalá, Department of Organic and Inorganic Chemistry, Research Institute in Chemistry “Andrés M. del Río” (IQAR), Madrid, Spain
- Ramón y Cajal Institute for Health Research, Ramón y Cajal Health Research Institute (IRYCIS), Madrid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Javier Sánchez-Nieves
- University of Alcalá, Department of Organic and Inorganic Chemistry, Research Institute in Chemistry “Andrés M. del Río” (IQAR), Madrid, Spain
- Ramón y Cajal Institute for Health Research, Ramón y Cajal Health Research Institute (IRYCIS), Madrid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Juan Cuadros
- University of Alcalá, Department of Biomedicine and Biotechnology, Faculty of Medicine, Madrid, Spain
- Clinical Microbiology Department, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Spain
| | - Ramón Pérez-Tanoira
- University of Alcalá, Department of Biomedicine and Biotechnology, Faculty of Medicine, Madrid, Spain
- Clinical Microbiology Department, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Spain
| |
Collapse
|
17
|
Uzelac M, Sladonja B, Šola I, Dudaš S, Bilić J, Famuyide IM, McGaw LJ, Eloff JN, Mikulic-Petkovsek M, Poljuha D. Invasive Alien Species as a Potential Source of Phytopharmaceuticals: Phenolic Composition and Antimicrobial and Cytotoxic Activity of Robinia pseudoacacia L. Leaf and Flower Extracts. PLANTS (BASEL, SWITZERLAND) 2023; 12:2715. [PMID: 37514330 PMCID: PMC10385011 DOI: 10.3390/plants12142715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
Black locust (Robinia pseudoacacia L.), an invasive tree in Europe, commonly known for its negative impact on biodiversity, is a rich source of phenolic compounds recognized in traditional medicine. Since the metabolite profile depends on the environment and climate, this study aimed to provide the first LC-MS phytochemical screening of the black locust from the Istria region (Croatia). The compounds were extracted from leaves and flowers with 70% ethanol and 80% methanol. Total phenolics (TP) and flavonoids (TF), as well as antioxidant capacity (AC) measured by ABTS (17.49-146.41 mg TE/g DW), DPPH (24.67-118.49 mg TE/g DW), and FRAP (7.38-77.53 mg TE/g DW) assays, were higher in leaf than in flower extracts. Higher TP and total non-flavonoid (TNF) values were displayed in ethanolic than in methanolic extracts. In total, 64 compounds were identified, of which flavonols (20) and hydroxycinnamic acid derivatives (15) were the most represented. Flavanols such as catechin dominated in leaf extracts, followed by flavonols, with kaempferol glucuronyl rhamnosyl hexosides as the main compound, respectively. Flower extracts had the highest share of flavones, followed by ellagitannins, with luteolin dirhamnosyl hexosides and vescalagin, respectively, being predominant. The extracts had good quorum sensing, biofilm formation prevention, and eradicating capacity. The results provided new insights into the phytochemical properties of R. pseudoacacia as the first step toward its potential pharmaceutical use.
Collapse
Affiliation(s)
- Mirela Uzelac
- Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, Karla Huguesa 8, 52440 Poreč, Croatia
| | - Barbara Sladonja
- Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, Karla Huguesa 8, 52440 Poreč, Croatia
| | - Ivana Šola
- Department of Biology, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | - Slavica Dudaš
- Agricultural Department, Polytechnic of Rijeka, Karla Huguesa 6, 52440 Poreč, Croatia
| | - Josipa Bilić
- METRIS Research Centre, Istrian University of Applied Sciences, Zagrebačka 30, 52100 Pula, Croatia
| | - Ibukun M Famuyide
- Phytomedicine Programme, Paraclinical Sciences Department, University of Pretoria, P/Bag X04, Onderstepoort, Pretoria 0110, Gauteng, South Africa
| | - Lyndy J McGaw
- Phytomedicine Programme, Paraclinical Sciences Department, University of Pretoria, P/Bag X04, Onderstepoort, Pretoria 0110, Gauteng, South Africa
| | - Jacobus N Eloff
- Phytomedicine Programme, Paraclinical Sciences Department, University of Pretoria, P/Bag X04, Onderstepoort, Pretoria 0110, Gauteng, South Africa
| | - Maja Mikulic-Petkovsek
- Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Danijela Poljuha
- Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, Karla Huguesa 8, 52440 Poreč, Croatia
| |
Collapse
|
18
|
Kannappan A, Jothi R, Tian X, Pandian SK, Gowrishankar S, Chunlei S. Antibacterial activity of 2-hydroxy-4-methoxybenzaldehyde and its possible mechanism against Staphylococcus aureus. J Appl Microbiol 2023; 134:lxad144. [PMID: 37422440 DOI: 10.1093/jambio/lxad144] [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: 01/27/2023] [Revised: 06/23/2023] [Accepted: 07/07/2023] [Indexed: 07/10/2023]
Abstract
AIM Staphylococcus aureus causes several complicated infections. Despite decades of research on developing new antimicrobials, methicillin-resistant S. aureus (MRSA) remains a global health problem. Hence, there is a dire need to identify potent natural antibacterial compounds as an alternative to antimicrobials. In this light, the present work divulges the antibacterial efficacy and the action mechanism of 2-hydroxy-4-methoxybenzaldehyde (HMB) isolated from Hemidesmus indicus against S. aureus. METHODS AND RESULTS Antimicrobial activity of HMB was assessed. HMB exhibited 1024 µg ml-1 as the minimum inhibitory concentration (MIC) and 2 × MIC as the minimum bactericidal concentration against S. aureus. The results were validated by spot assay, time kill, and growth curve analysis. In addition, HMB treatment increased the release of intracellular proteins and nucleic acid contents from MRSA. Additional experiments assessing the structural morphology of bacterial cells using SEM analysis, β-galactosidase enzyme activity, and the fluorescence intensities of propidium iodide and rhodamine123 dye divulged that the cell membrane as one of the targets of HMB to hinder S. aureus growth. Moreover, the mature biofilm eradication assay revealed that HMB dislodged nearly 80% of the preformed biofilms of MRSA at the tested concentrations. Further, HMB treatment was found to sensitize MRSA cells upon combining tetracycline treatment. CONCLUSIONS The present study suggests that HMB is a promising compound with antibacterial and antibiofilm activities and could act as a lead structure for developing new antibacterial drugs against MRSA.
Collapse
Affiliation(s)
- Arunachalam Kannappan
- MOST-USDA Joint Research Center for Food Safety, School of Agriculture and Biology, and State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ravi Jothi
- Department of Biotechnology, Science Campus, Alagappa University, Karaikudi, Tamil Nadu 630 003, India
| | - Xiaorong Tian
- MOST-USDA Joint Research Center for Food Safety, School of Agriculture and Biology, and State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China
| | | | - Shanmugaraj Gowrishankar
- Department of Biotechnology, Science Campus, Alagappa University, Karaikudi, Tamil Nadu 630 003, India
| | - Shi Chunlei
- MOST-USDA Joint Research Center for Food Safety, School of Agriculture and Biology, and State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China
| |
Collapse
|
19
|
Aguilera-Correa JJ, Nohynek L, Alakomi HL, Esteban J, Oksman-Caldentey KM, Puupponen-Pimiä R, Kinnari TJ, Perez-Tanoira R. Reduction of methicillin-resistant Staphylococcus aureus biofilm growth and development using arctic berry extracts. Front Cell Infect Microbiol 2023; 13:1176755. [PMID: 37424779 PMCID: PMC10327478 DOI: 10.3389/fcimb.2023.1176755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 05/23/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction Surgical site infection remains a devastating and feared complication of surgery caused mainly by Staphylococcus aureus (S. aureus). More specifically, methicillin-resistant S. aureus (MRSA) infection poses a serious threat to global health. Therefore, developing new antibacterial agents to address drug resistance are urgently needed. Compounds derived from natural berries have shown a strong antimicrobial potential. Methods This study aimed to evaluate the effect of various extracts from two arctic berries, cloudberry (Rubus chamaemorus) and raspberry (Rubus idaeus), on the development of an MRSA biofilm and as treatment on a mature MRSA biofilm. Furthermore, we evaluated the ability of two cloudberry seed-coat fractions, hydrothermal extract and ethanol extract, and the wet-milled hydrothermal extract of a raspberry press cake to inhibit and treat biofilm development in a wound-like medium. To do so, we used a model strain and two clinical strains isolated from infected patients. Results All berry extracts prevented biofilm development of the three MRSA strains, except the raspberry press cake hydrothermal extract, which produced a diminished anti-staphylococcal effect. Discussion The studied arctic berry extracts can be used as a treatment for a mature MRSA biofilm, however some limitations in their use exist.
Collapse
Affiliation(s)
- John Jairo Aguilera-Correa
- Department of Clinical Microbiology, Instituto de Investigación Sanitaria (IIS)-Fundación Jiménez Díaz, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Liisa Nohynek
- VTT Technical Research Centre of Finland Ltd., Industrial Biotechnology and Food, Espoo, Finland
| | - Hanna-Leena Alakomi
- VTT Technical Research Centre of Finland Ltd., Industrial Biotechnology and Food, Espoo, Finland
| | - Jaime Esteban
- Department of Clinical Microbiology, Instituto de Investigación Sanitaria (IIS)-Fundación Jiménez Díaz, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
| | | | - Riitta Puupponen-Pimiä
- VTT Technical Research Centre of Finland Ltd., Industrial Biotechnology and Food, Espoo, Finland
| | - Teemu J. Kinnari
- Department of Otorhinolaryngology – Head and Neck Surgery, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Ramon Perez-Tanoira
- Department of Clinical Microbiology, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Spain
- Department of Health Sciences, Faculty of Medicine, University of Alcalá, Alcalá de Henares, Spain
| |
Collapse
|
20
|
Pulsed Electromagnetic Fields Disrupt Staphylococcus epidermidis Biofilms and Enhance the Antibiofilm Efficacy of Antibiotics. Microbiol Spectr 2022; 10:e0194922. [PMID: 36314923 PMCID: PMC9769884 DOI: 10.1128/spectrum.01949-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Staphylococcus epidermidis is implicated in a multitude of human infections and is one of the major causes of clinical infections in hospitals, especially at surgical sites and on indwelling medical devices, such as orthopedic implants. These infections are especially dangerous because of the S. epidermidis propensity to form biofilms, which increases resistance to antibiotics and the natural immune response. This study investigated pulsed electromagnetic fields (PEMF) as a potential treatment to combat such infections, as PEMF exposure was expected to disrupt the electrostatic forces that adhere staphylococcal cells to surfaces and to one another. To test the effect of PEMF on biofilms, S. epidermidis cultures were exposed to PEMF at various durations either during the growth phase or after a full biofilm had formed. In addition, cells were exposed to PEMF and concomitant antibiotic treatment. Biofilm viability was quantified by both crystal violet and alamarBlue assays and scanning electron microscopy. The results demonstrated that PEMF significantly inhibited biofilm formation and disrupted preformed biofilms in vitro while also showing synergistic biofilm inhibition when combined with antibiotics. These combined results indicate that PEMF should be considered a promising novel technique for treating S. epidermidis biofilm infections and undergo further testing in vivo. IMPORTANCE Antibiotic resistance and biofilm infections are major issues in health care because of the lack of a successful treatment modality and poor patient outcomes. These infections are a particular issue following orthopedic surgery or trauma wherein an infection may form on an orthopedic implant or patient's bone. The presented study demonstrates that pulsed electromagnetic fields may be a promising novel treatment for such infections and can overcome the medical challenges presented by biofilm formation. Furthermore, the effects demonstrated are even greater when combining pulsed electromagnetic field therapy with traditional antibiotics.
Collapse
|
21
|
Coluccia A, Matti F, Zhu X, Lussi A, Stähli A, Sculean A, Eick S. In Vitro Study on Green Propolis as a Potential Ingredient of Oral Health Care Products. Antibiotics (Basel) 2022; 11:antibiotics11121764. [PMID: 36551420 PMCID: PMC9774696 DOI: 10.3390/antibiotics11121764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022] Open
Abstract
Propolis is increasingly being discussed as an alternative to commonly used antiseptics. This in vitro study focused on the ethanolic extract of green Brazilian propolis (EEPg) as an additive in an oral health care product. We investigated (i) a potential inflammation-modulation activity of EEPg when a periodontal or Candida biofilm was exposed to monocytic (MONO-MAC-6) cells, (ii) the adhesion of oral pathogens to gingival keratinocytes and (iii) the antimicrobial and antibiofilm effect of different toothpaste formulations. EEPg decreased the levels of interleukin (IL)-1β and increased IL-10 in MONO-MAC cells challenged with a periodontal biofilm. In contact with TIGK cells, EEPg reduced the numbers of adherent Porphyromonas gingivalis to 0.5% but did not affect the adhesion of Candida albicans. The frequent brushing of a cariogenic biofilm with a toothpaste supplemented with EEPg reduced the surface microhardness loss of enamel specimens. Mixing an experimental erythritol toothpaste with 25 and 50 mg/mL of EEPg confirmed the antibacterial activity of EEPg against oral bacteria and particularly inhibited periodontal biofilm formation. The suggested toothpaste formulations seem to have potential in the prevention of caries, gingivitis and periodontitis and should be evaluated in further in vitro research and in clinical trials.
Collapse
Affiliation(s)
- Achille Coluccia
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Fabienne Matti
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Xilei Zhu
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Adrian Lussi
- Preventive and Paediatric Dentistry, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Alexandra Stähli
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Anton Sculean
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Sigrun Eick
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
- Correspondence:
| |
Collapse
|
22
|
Potential of Bouea macrophylla kernel extract as an intracanal medicament against mixed-species bacterial-fungal biofilm. An in vitro and ex vivo study. Arch Oral Biol 2022; 143:105539. [PMID: 36148767 DOI: 10.1016/j.archoralbio.2022.105539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 09/01/2022] [Accepted: 09/01/2022] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate the antimicrobial activity of B. macrophylla kernel extract against mixed-species biofilms of E. faecalis, S. gordonii and C. albicans in vitro. To evaluate the efficacy of the extract as an intracanal medicament compared with Ca(OH)2 and chlorhexidine in ex vivo tooth model. METHODS The antibiofilm effect of B. macrophylla kernel extract was determined by AlamarBlue™ assay and the effect on biofilms was visualized by LIVE/DEAD® BacLight™ viability test. Mixed-species biofilms were incubated into the tooth model (N = 42) for 21 days. The teeth were randomly divided into 4 medicament groups for 7 days: (i) normal saline, (ii) calcium hydroxide (Ca(OH)2), (iii) chlorhexidine gel, (iv) B. macrophylla kernel extract. Dentine samples were collected, qPCR with PMA was used to quantify the viability and species composition of each sample. SEM was used to visualize the effect of medicament on biofilm structure. RESULTS The MBIC was 6.25 mg/mL and the MBEC was 50 mg/mL. The integrity of microbial cells was progressively compromised as concentration increased, resulting in greater cell death. Ex vivo tooth model revealed that biofilm treated with 50 mg/mL of the B. macrophylla extract demonstrated a significantly higher proportions of dead cells than in Ca(OH)2, chlorhexidine and normal saline groups (p < 0.01). Disruption of biofilm structure and enlargement of dentinal tubules was observed in B. macrophylla group on SEM. CONCLUSION The extract of B. macrophylla kernel exhibited significant antibiofilm effect against the mixed-species biofilms of E. faecalis, S. gordonii and C. albicans.
Collapse
|
23
|
Koukab S, Rashid N, Ahmad I, Nadeem H, Ismail H. Synthesis, in-Silico studies, and in-Vitro bio-evaluation of new bi-thiacoumarins. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
24
|
Chai CH, Hong CF, Huang JW. Identification and Characterization of a Multifunctional Biocontrol Agent, Streptomyces griseorubiginosus LJS06, Against Cucumber Anthracnose. Front Microbiol 2022; 13:923276. [PMID: 35722317 PMCID: PMC9201727 DOI: 10.3389/fmicb.2022.923276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 05/16/2022] [Indexed: 11/29/2022] Open
Abstract
Twenty-eight bacterial strains isolated from Chinese herb extracts, beer fermentation waste, and raw oyster shells were evaluated for their efficacy in controlling cucumber anthracnose. Four bacterial strains, namely TG01, TG02, LJS06, and LJS08, were found to effectively reduce the mycelial growth of Colletotrichum orbiculare COC3 on PDA media. Spraying or drenching LJS06 spore suspension before inoculation significantly p < 0.05 reduced disease severity; thus, LJS06 was subject to further characterization. On the basis of the morphological, physiological, and biochemical characteristics and a multilocus sequence analysis of partial 16S rRNA, atpD, rpoB, and trpB genes, LJS06 was identified to be Streptomyces griseorubiginosus (Ryabova and Preobrazhenskaya) Pridham et al. Physiological and biochemical tests revealed that S. griseorubiginosus LJS06 can produce amylase, cellulase, chitinase, protease, siderophore, polyamines, and indole-3-acetic acid. Thus, a culture filtrate of LJS06 (specifically SL06) was formulated and evaluated for its efficacy against conidial germination, appressorium formation, and anthracnose management. Diluted SL06 was found to significantly (p < 0.05) inhibit conidial germination and appressorium formation, which can be attributed to impaired membrane integrity, accumulated reactive oxygen species (ROS), and impaired energy metabolism in the conidia. In addition, the spraying and drenching of diluted SL06 before inoculation consistently and significantly (p < 0.05) reduced anthracnose severity. These results jointly suggest that S. griseorubiginosus LJS06 can aid in the management of cucumber anthracnose by directly inhibiting conidial function and priming the plant defense system.
Collapse
Affiliation(s)
- Chien Hao Chai
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
| | - Cheng-Fang Hong
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
- Innovative and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung, Taiwan
- *Correspondence: Cheng-Fang Hong,
| | - Jenn-Wen Huang
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
- Innovative and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung, Taiwan
- Jenn-Wen Huang,
| |
Collapse
|
25
|
Saleem F, Mehmood R, Khan TJ, Hassen SU, Maher S, Ahmad S, Perveen S, Azeem M. Physicochemical and Bioassay Directed GC-MS Analyses of Chloroform Extract of Pteris cretica L. Pharm Chem J 2022. [DOI: 10.1007/s11094-022-02648-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
26
|
Xu M, Zhou J, Heng D, Su X, Onakpa MM, Bai Y, Duan JA, Che CT, Bi H, Zhao M. Quinone Derivatives as Promising Anti- Helicobacter pylori Agents from Aerial Parts of Mitracarpus hirtus. JOURNAL OF NATURAL PRODUCTS 2022; 85:1029-1038. [PMID: 35412828 DOI: 10.1021/acs.jnatprod.1c01163] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Seven new naphthoquinone diglycosides (1-7), three new anthraquinones (8-10), and eight known analogues were obtained from the aerial parts of Mitracarpus hirtus collected from West Africa in a bioassay-guided phytochemical investigation. All isolated compounds were elucidated by comparison with the literature and interpretation of spectroscopic data, and the absolute configurations of the new naphthoquinone diglycosides (1-10) were confirmed by chemical methods and ECD calculations. Notably, compound 1 was found to be the first naphthoquinone diglycoside containing carboxylic acid and isopentenyl side chains isolated from a species in the genus Mitracarpus. Compounds 6-18 showed antibacterial activity against multiple Helicobacter pylori strains with MIC values ranging from 0.0625 to 64 μg/mL. Particularly, 1-hydroxybenzoisochromanquinone (17) and benzo[g]isoquinoline-5,10-dione (18), with MIC values of 0.0625 and 0.125 μg/mL, displayed 32-512-fold higher potencies than a positive control, metronidazole. Compound 18 also demonstrated high antibiofilm activity and killed biofilm-encased Helicobacter pylori cells more effectively than metronidazole.
Collapse
Affiliation(s)
- Mingming Xu
- Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
| | - Junfei Zhou
- Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
| | - Ding Heng
- Department of Pathogen Biology, Jiangsu Key Laboratory of Pathogen Biology, Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Xiaorong Su
- Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210029, People's Republic of China
| | - Monday M Onakpa
- Department of Veterinary Pharmacology and Toxicology, University of Abuja, Abuja 920001, Nigeria
| | - Yuefan Bai
- Department of Pathogen Biology, Jiangsu Key Laboratory of Pathogen Biology, Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Jin-Ao Duan
- Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
| | - Chun-Tao Che
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Hongkai Bi
- Department of Pathogen Biology, Jiangsu Key Laboratory of Pathogen Biology, Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Ming Zhao
- Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| |
Collapse
|
27
|
Hympanova M, Oliver-Urrutia C, Vojta M, Macháček M, Krupka P, Kukla R, Celko L, Montufar EB, Marek J. Assessment of Streptococcus mutans biofilm formation on calcium phosphate ceramics: The role of crystalline composition and microstructure. BIOMATERIALS ADVANCES 2022; 135:212750. [PMID: 35929222 DOI: 10.1016/j.bioadv.2022.212750] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 02/14/2022] [Accepted: 03/04/2022] [Indexed: 06/15/2023]
Abstract
Streptococcus mutans is one of the bacteria that initiates the colonization of the pellicle at the tooth surface. It forms a plaque, together with other bacteria, which gradually dissolves the pellicle and leaves the tooth surface unprotected against the acidic oral environment. Calcium phosphate ceramics are excellent synthetic materials for the study of biofilm formation in dentistry because they are comparable to teeth in chemical composition and structure. Calcium phosphates can be processed to achieve a variety of crystalline compounds with biologically relevant ionic substitutions and structures that allow study of the effect of the surface chemistry and the topography independently. In this article, we describe the preparation and characterization of three types of calcium phosphate-based materials as a suitable surface for the formation of the S. mutans biofilm: beta-tricalcium phosphate (β-TCP); sintered hydroxyapatite (SHA); and calcium-deficient hydroxyapatite (CDHA). The densest biofilms were formed on the surfaces of SHA and CDHA, with no significant differences due to the stoichiometry or microstructure. In contrast, β-TCP showed a lower susceptibility to S. mutans biofilm formation, suggesting that the crystalline structure is the controlling parameter. Subsequently, SHA was selected to develop a dental biofilm model that allowed study of S. mutans biofilm susceptibility to chlorhexidine and ethanol.
Collapse
Affiliation(s)
- Michaela Hympanova
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; Department of Epidemiology, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 05 Hradec Kralove, Czech Republic
| | - Carolina Oliver-Urrutia
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, 61200 Brno, Czech Republic
| | - Marek Vojta
- Department of Biology, Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, 500 03 Hradec Kralove, Czech Republic
| | - Miloslav Macháček
- Department of Biochemical Sciences, Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, Hradec Kralove 500 05, Czech Republic
| | - Pavel Krupka
- Department of Dentistry, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
| | - Rudolf Kukla
- Department of Clinical Microbiology, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic
| | - Ladislav Celko
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, 61200 Brno, Czech Republic
| | - Edgar B Montufar
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, 61200 Brno, Czech Republic.
| | - Jan Marek
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic; Department of Epidemiology, Faculty of Military Health Sciences, University of Defence, Trebesska 1575, 500 05 Hradec Kralove, Czech Republic.
| |
Collapse
|
28
|
Chanawanno K, Thuptimdang P, Chantrapromma S, Fun HK. New tunable pyridinium benzenesulfonate amphiphiles as anti-MRSA quaternary ammonium compounds (QACs). J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
29
|
Surface Functionalization of Ureteral Stents-Based Polyurethane: Engineering Antibacterial Coatings. MATERIALS 2022; 15:ma15051676. [PMID: 35268903 PMCID: PMC8910958 DOI: 10.3390/ma15051676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/04/2022] [Accepted: 02/14/2022] [Indexed: 12/10/2022]
Abstract
Bacterial colonization of polyurethane (PU) ureteral stents usually leads to severe and challenging clinical complications. As such, there is an increasing demand for an effective response to this unmet medical challenge. In this study, we offer a strategy based on the functionalization of PU stents with chitosan-fatty acid (CS-FA) derivatives to prevent bacterial colonization. Three different fatty acids (FAs), namely stearic acid (SA), oleic acid (OA), and linoleic acid (LinA), were successfully grafted onto chitosan (CS) polymeric chains. Afterwards, CS-FA derivatives-based solutions were coated on the surface of PU stents. The biological performance of the modified PU stents was evaluated against the L929 cell line, confirming negligible cytotoxicity of the developed coating formulations. The antibacterial potential of coated PU stents was also evaluated against several microorganisms. The obtained data indicate that the base material already presents an adequate performance against Staphylococcus aureus, which slightly improved with the coating. However, the performance of the PU stents against Gram-negative bacteria was markedly increased with the surface functionalization approach herein used. As a result, this study reveals the potential use of CS-FA derivatives for surface functionalization of ureteral PU stents and allows for conjecture on its successful application in other biomedical devices.
Collapse
|
30
|
Boutsioukis C, Arias-Moliz MT, Chávez de Paz LE. A critical analysis of research methods and experimental models to study irrigants and irrigation systems. Int Endod J 2022; 55 Suppl 2:295-329. [PMID: 35171506 PMCID: PMC9314845 DOI: 10.1111/iej.13710] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 11/28/2022]
Abstract
Irrigation plays an essential role in root canal treatment. The purpose of this narrative review was to critically appraise the experimental methods and models used to study irrigants and irrigation systems and to provide directions for future research. Studies on the antimicrobial effect of irrigants should use mature multispecies biofilms grown on dentine or inside root canals and should combine at least two complementary evaluation methods. Dissolution of pulp tissue remnants should be examined in the presence of dentine and, preferably, inside human root canals. Micro-omputed tomography is currently the method of choice for the assessment of accumulated dentine debris and their removal. A combination of experiments in transparent root canals and numerical modeling is needed to address irrigant penetration. Finally, models to evaluate irrigant extrusion through the apical foramen should simulate the periapical tissues and provide quantitative data on the amount of extruded irrigant. Mimicking the in vivo conditions as close as possible and standardization of the specimens and experimental protocols are universal requirements irrespective of the surrogate endpoint studied. Obsolete and unrealistic models must be abandoned in favour of more appropriate and valid ones that have more direct application and translation to clinical Endodontics.
Collapse
Affiliation(s)
- C Boutsioukis
- Department of Endodontology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - M T Arias-Moliz
- Department of Microbiology, Faculty of Dentistry, University of Granada, Granada, Spain
| | | |
Collapse
|
31
|
Ocaña AV, Aguilera‐Correa JJ, Domínguez‐Jurado E, Pérez‐Martínez FC, Pérez‐Tanoira R, López‐Carretero Y, Masiá‐Mondejar J, Castro‐Osma JA, Esteban J, Alonso‐Moreno C, Molina‐Alarcón M, Seguí P. A bis(pyrazolyl)methane derivative against clinical Staphylococcus aureus strains isolated from otitis externa. Laryngoscope Investig Otolaryngol 2022; 7:283-290. [PMID: 35155809 PMCID: PMC8823158 DOI: 10.1002/lio2.722] [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: 11/23/2021] [Accepted: 12/11/2021] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE The purpose of this study was to evaluate the in vitro antibacterial effects of a p-Cymene-based bis(pyrazolyl)methane derivative (SC-19) to advance in developing alternative therapeutic compounds to fight against bacterial isolates from patients with otitis externa (OE). METHODS Eighteen swab specimens were collected from patients aged over 18 years diagnosed with OE within at least 7 days of symptom onset, contaminated by only one bacterium type: Pseudomonas aeruginosa (n = 5); Staphylococcus aureus (n = 8); Klebsiella aerogenes (n = 2); Serratia marcescens (n = 1); Morganella morganii (n = 2). To appraise antibacterial activity, minimal inhibitory concentration (MIC), minimal bactericidal concentration (MBC), minimum biofilm inhibitory concentration (MBIC), and minimum biofilm eradication concentration (MBEC) assays were run at different SC-19 concentrations. RESULTS When using SC-19, S. aureus strains showed less bacterial growth, but no bactericidal effect was observed. The MIC and MBC of SC-19 were 62.5 and 2000 μg/ml against S. aureus and were >2000 μg/ml against the other isolates obtained from OE, respectively. In addition, the MBICs and MBECs of SC-19 against S. aureus were 125 and >2000 μg/ml, respectively. CONCLUSION Nowadays the acquired antibiotic resistance phenomenon has stimulated research into novel and more efficient therapeutic agents. Hence, we report that, helped by the structural diversity fostered herein by a range of bis(pyrazolyl)methane derivatives, SC-19 can be a promising alternative therapeutic option for treating OE caused by S. aureus given the observed effects on both planktonic state and biofilm. LEVEL OF EVIDENCE IV.
Collapse
Affiliation(s)
- Ana V. Ocaña
- Instituto de Investigación en Discapacidades Neurológicas (IDINE)University of Castilla‐La ManchaAlbaceteSpain
| | | | - Elena Domínguez‐Jurado
- NanoCRIB UnitCentro Regional de Investigaciones BiomédicasAlbaceteSpain
- School of PharmacyUniversity of Castilla‐La ManchaAlbaceteSpain
| | - Francisco C. Pérez‐Martínez
- Instituto de Investigación en Discapacidades Neurológicas (IDINE)University of Castilla‐La ManchaAlbaceteSpain
| | - Ramón Pérez‐Tanoira
- Clinical Microbiology DepartmentHospital Universitario Príncipe de AsturiasMadridSpain
- Biomedicine y Biotechnology Department, School of MedicineUniversity of Alcalá de HenaresAlcalá de HenaresSpain
| | | | - Jesús Masiá‐Mondejar
- Instituto de Investigación en Discapacidades Neurológicas (IDINE)University of Castilla‐La ManchaAlbaceteSpain
| | - José Antonio Castro‐Osma
- NanoCRIB UnitCentro Regional de Investigaciones BiomédicasAlbaceteSpain
- School of PharmacyUniversity of Castilla‐La ManchaAlbaceteSpain
| | - Jaime Esteban
- Clinical Microbiology DepartmentIIS‐Fundacion Jimenez Diaz‐UAMMadridSpain
| | - Carlos Alonso‐Moreno
- NanoCRIB UnitCentro Regional de Investigaciones BiomédicasAlbaceteSpain
- School of PharmacyUniversity of Castilla‐La ManchaAlbaceteSpain
| | - Milagros Molina‐Alarcón
- Instituto de Investigación en Discapacidades Neurológicas (IDINE)University of Castilla‐La ManchaAlbaceteSpain
- Department of NursingUniversity of Castilla‐La ManchaAlbaceteSpain
| | - Pedro Seguí
- Instituto de Investigación en Discapacidades Neurológicas (IDINE)University of Castilla‐La ManchaAlbaceteSpain
- Department of OtorrinolaringologyComplejo Hospitalario UniversitarioAlbaceteSpain
| |
Collapse
|
32
|
Effect of Gold Nanostars Plus Amikacin against Carbapenem-Resistant Klebsiella pneumoniae Biofilms. BIOLOGY 2022; 11:biology11020162. [PMID: 35205029 PMCID: PMC8869706 DOI: 10.3390/biology11020162] [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: 11/06/2021] [Revised: 01/11/2022] [Accepted: 01/18/2022] [Indexed: 01/16/2023]
Abstract
Simple Summary Carbapenem-resistant Klebsiella pneumoniae (CR-KP) infection rates represent a challenging treatment since the pipeline for effective antibiotics against this pathogen, such as beta-lactams among others, is practically nil. This study aims to evaluate the antibacterial effect of gold nanostars (GNS) alone or associated with some of the most widely used antibiotics for the treatment of CR-KP strains, i.e., meropenem or amikacin, on both planktonic or free-living and sessile forms. GNS were able to inhibit the planktonic growth of CR-KP at 80 µM, to eradicate the bacterial viability at 160 µM, and were unable to inhibit or eradicate the biofilm growth of this bacterium. GNS gave rise to filamentous bacteria through mechanisms mediated by the inhibition of energy-dependent cytoplasmic proteases. The combination of GNS and amikacin was able to inhibit or even eradicate the CR-KP biofilm. This combination was administered to greater wax moth larvae (Galleria mellonella), and this treatment was found to be tolerated well and to prevent the CR-KP infection. Thus, GNS in combination with amikacin represent a promising anti-CR-KP nanomaterial. Abstract (1) Background: Carbapenem-resistant Klesiella pneumoniae (CR-KP) infection rates depict an almost pre-antibiotic scenario since the pipeline for effective antibiotics against this pathogen has been almost entirely depleted. This study aims to evaluate the antibacterial effect of gold nanostars (GNS) alone or associated with some of the most widely used antibiotics for the treatment of CR-KP strains, i.e., meropenem or amikacin, on both planktonic and sessile forms. Additionally, we measured the effect of GNS on cell proliferation and biocompatibility in invertebrate in vivo models. (2) Materials and methods: GNS were made from gold seeds grown using a seeded-growth surfactant-free method assisted by silver ions and functionalized with mercapto-poly(ethylene glycol)amino by ligand exchange. The antimicrobial capacity, effect on cell proliferation, and biocompatibility of the most effective combination was evaluated in a Galleria mellonella model. (3) Results: The minimum inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) were 80 and 160 µM of GNS for all strains, respectively. The minimum biofilm inhibitory concentration (MBIC) and minimum biofilm eradication concentration (MBEC) were >320 µM of GNS for both. A synergy was found between GNS and amikacin. Larvae administered GNS plus amikacin were found to tolerate the treatment well, which prevented infection. (4) Conclusions: GNS are a promising anti-CR-KP nanomaterial.
Collapse
|
33
|
do Canto Canabarro M, Meneghetti KL, Geimba MP, Corção G. Biofilm formation and antibiotic susceptibility of Staphylococcus and Bacillus species isolated from human allogeneic skin. Braz J Microbiol 2021; 53:153-160. [PMID: 34735709 DOI: 10.1007/s42770-021-00642-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 10/21/2021] [Indexed: 11/26/2022] Open
Abstract
Human skin banks around the world face a serious problem with the high number of allogeneic skins that are discarded and cannot be used for grafting due to persistent bacterial contamination even after antibiotic treatment. The biofilm formation capacity of these microorganisms may contribute to the antibiotic tolerance; however, this is not yet widely discussed in the literature. Thisstudy analyzed bacterial strains isolated from allogeneic human skin samples,which were obtained from a hospital skin bank that had already been discardeddue to microbial contamination. Biofilm formation and susceptibility topenicillin, tetracycline, and gentamicin were evaluated by crystal violetbiomass quantification and determination of the minimum inhibitoryconcentration (MIC), minimum biofilm inhibitory concentration (MBIC), andminimum biofilm eradication concentration (MBEC) by the broth microdilutionmethod with resazurin dye. A total of 216 bacterial strains were evaluated, and204 (94.45%) of them were classified as biofilm formers with varying degrees ofadhesion. MBICs were at least 512 times higher than MICs, and MBECs were atleast 512 times higher than MBICs. Thus, the presence of biofilm in allogeneicskin likely contributes to the inefficiency of the applied treatments as antibiotictolerance is known to be much higher when bacteria are in the biofilmconformation. Thus, antibiotic treatment protocols in skin banks shouldconsider biofilm formation and should include compounds with antibiofilmaction.
Collapse
Affiliation(s)
- Micaela do Canto Canabarro
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal Do Rio Grande Do Sul, Sarmento Leite 500, Porto Alegre, 90050-170, Brazil
| | - Karine Lena Meneghetti
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal Do Rio Grande Do Sul, Sarmento Leite 500, Porto Alegre, 90050-170, Brazil
| | - Mercedes Passos Geimba
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal Do Rio Grande Do Sul, Sarmento Leite 500, Porto Alegre, 90050-170, Brazil
| | - Gertrudes Corção
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal Do Rio Grande Do Sul, Sarmento Leite 500, Porto Alegre, 90050-170, Brazil.
| |
Collapse
|
34
|
Pourkhosravani E, Dehghan Nayeri F, Mohammadi Bazargani M. Decoding antibacterial and antibiofilm properties of cinnamon and cardamom essential oils: a combined molecular docking and experimental study. AMB Express 2021; 11:143. [PMID: 34704145 PMCID: PMC8548479 DOI: 10.1186/s13568-021-01305-6] [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: 10/04/2021] [Accepted: 10/16/2021] [Indexed: 11/10/2022] Open
Abstract
This study sets out to compare the antibacterial and antibiofilm profiles of Ci/Ca EOs alone and in combination together against infectious bacterial strains. MIC assay was carried out to survey the effectiveness of prepared EOs by two-fold serial dilution method and MTT evaluation. Synergic antibacterial properties of EOs against target strains were studied by using checkerboard titration method. Biofilm growth and development were evaluated using CV and XTT reduction assays. Antibacterial activity was observed for EOs against both bacterial strains with stronger activity for CiEO against both bacteria. The synergistic antibacterial effect was observed only against B. subtilis. Based on the FIC index, combinations could not inhibit the growth of E. coli. The pure EOs and their combination inhibited cell attachment for both studied bacteria with stronger effect on E. coli. CV and XTT reduction assays results showed that Ci EO and its combination with CaEO had the highest antibiofilm activity at lowest MIC value 0.08% and 0.04/0.02% against biofilm formed by E. coli and B. subtilis respectively, indicating a high antibiofilm potential. Computational docking analyses also postulated that the active constituents of evaluated EOs have the potential to interact with different bacterial targets, suggested binding mode of action of EOs metabolites. By and large, synergistic anti-biofilm properties of EOs may provide further options for developing novel formula to inhibit a variety of infectious clinical and industrial strains without (or less) toxicity effects on human body. ![]()
Collapse
|
35
|
High-throughput screening alternative to crystal violet biofilm assay combining fluorescence quantification and imaging. J Microbiol Methods 2021; 190:106343. [PMID: 34619138 DOI: 10.1016/j.mimet.2021.106343] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 11/23/2022]
Abstract
The crystal violet assay is widely used for biofilm quantitation despite its toxicity and variability. Here, we instead combine fluorescence labelling with the Cytation 5 multi-mode plate reader, to enable simultaneous acquisition of both quantitative and imaging biofilm data. This high-throughput method produces more robust data and provides information about morphology and spatial species organization within the biofilm.
Collapse
|
36
|
Luo Z, Geng S, Lu B, Han G, Wang Y, Luo Y, Yang Z, Cao S, Yao X. Isolation, Genomic Analysis, and Preliminary Application of a Bovine Klebsiella pneumoniae Bacteriophage vB_Kpn_B01. Front Vet Sci 2021; 8:622049. [PMID: 34540928 PMCID: PMC8446446 DOI: 10.3389/fvets.2021.622049] [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: 11/02/2020] [Accepted: 08/10/2021] [Indexed: 12/20/2022] Open
Abstract
Klebsiella pneumoniae is an important pathogen that can infect both humans and cattle. The widespread K. pneumoniae and its high drug resistance make it difficult to treat Klebsiella infections/diseases. In this study, a lytic K. pneumoniae bacteriophage vB_Kpn_B01 was isolated from a dairy farm trough in Sichuan Province, and its biological properties were studied, and the entire genome of vB_Kpn_B01 was sequenced. The therapeutic effects of the phage on disease-causing mice were preliminarily tested. Phages found in this study are double-stranded DNA bacterial viruses belonging to the family Siphoviridae, Sugarlandvirus. The results suggest that vB_Kpn_B01 has strong specificity and low adaptability to different adverse conditions. Meanwhile, the predicted gene products of phage vB_Kpn_B01 comprised 149 coding sequences (CDS) and 25 tRNAs, of which 34 CDS had known functions. Of course, vB_Kpn_B01 did not contain any known antibiotic-resistant or virulent genes. The pathological sections of the liver and lungs of mice showed that the inflammatory scores of the treatment group were lower than in the bacterial group. Phage vB_Kpn_B01 alleviated the inflammatory response in the organs of the infected mice, and the organ tissue bacterial load of the treatment group was significantly lower than that of the bacterial group. Therefore, vB_Kpn_B01 can inhibit the proliferation of K. pneumoniae 18 in vivo and can alleviate the inflammation of target organs caused by infectious bacteria, which preliminarily indicates that vB_Kpn_B01 has a certain therapeutic effect on laboratory-infected mice.
Collapse
Affiliation(s)
- Zidan Luo
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Shangjingchao Geng
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Biao Lu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Guangli Han
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yin Wang
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Yan Luo
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Zexiao Yang
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Suizhong Cao
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Xueping Yao
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| |
Collapse
|
37
|
In Vitro Activity of Propolis on Oral Microorganisms and Biofilms. Antibiotics (Basel) 2021; 10:antibiotics10091045. [PMID: 34572627 PMCID: PMC8472590 DOI: 10.3390/antibiotics10091045] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/20/2021] [Accepted: 08/25/2021] [Indexed: 11/17/2022] Open
Abstract
Natural products are being discussed as alternatives to commonly used chemicals in antimicrobial therapy. The study aimed to investigate the antimicrobial activity of propolis against microbial species associated with caries, periodontal disease, and Candida infections. Two commercially available ethanolic extracts of Brazilian and one of European propolis (EEP) were used. The minimal inhibitory concentrations (MIC) of propolis and controls against eight microbial strains were determined. Scanning and transmission electron microscopy (SEM and TEM) images visualized the effect of propolis on microorganisms. Subsequently, the activity on three different multi-species biofilms (both formation and existing biofilms) was assessed. All MIC values of the Brazilian EEPs were low against the tested oral species (≤0.1 mg/mL–3.13 mg/mL propolis (Candida albicans)). The European EEP had slightly higher MICs than the Brazilian EEPs. The SEM and TEM images suggest an interaction of propolis with the microbial cell wall. The European EEP exhibited the strongest effect on retarding biofilm formation, whereas the Brazilian EEPs were highly active against preformed biofilms (100 mg/mL propolis of both EEPs reduced colony forming unit counts always by more than 6 log10). The antimicrobial and anti-biofilm activities point to the potential of propolis as an adjunct in oral health care products.
Collapse
|
38
|
Zhao X, Kuipers OP. Synthesis of silver-nisin nanoparticles with low cytotoxicity as antimicrobials against biofilm-forming pathogens. Colloids Surf B Biointerfaces 2021; 206:111965. [PMID: 34237525 DOI: 10.1016/j.colsurfb.2021.111965] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 06/02/2021] [Accepted: 07/01/2021] [Indexed: 10/20/2022]
Abstract
Wound infection is a serious threat to patients, in particular those with septic wound infections, which result in high mortality rates. Moreover, the treatment of wound infections with antimicrobial-resistant and/or biofilm-forming pathogens can be challenging. Nisin, a potent antimicrobial against Gram-positive bacterial pathogens, has been used in the food industry as a preservative for decades. Silver has been approved by the FDA as a topical antimicrobial. Here, we show that silver-nisin nanoparticles (Ag-nisin NP), with an average diameter of 60 nm, can be quickly synthesized with the assistance of a simple microwave. Ag-nisin NP act as bactericidal antibiotics against the tested pathogens. In contrast, resistance was observed in S. aureus and A. baumannii that were treated with silver nitrate alone. In addition, Ag-nisin NP showed potent antibiofilm activity against S. aureus, P. aeruginosa, A. baumannii, K. pneumoniae, and E. coli, which are pathogens occurring in wound infections. Notably, the synthesized Ag-nisin NP showed lower cytotoxicity than silver nitrate to human cells. This formulation provides an alternative and safe measurement for biofilm-infected wound control.
Collapse
Affiliation(s)
- Xinghong Zhao
- Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, 9747 AG, the Netherlands
| | - Oscar P Kuipers
- Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, 9747 AG, the Netherlands.
| |
Collapse
|
39
|
Qureshi F, Memon SQ, Khuhawar MY, Jahangir TM, Channar A. Synthesis and application of fluorescent and thermally stable polyazomethine as adsorbent in the remediation of Ni (II), Cu (II) and Co (II) from wastewater systems. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02582-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
40
|
Diepoltová A, Konečná K, Janďourek O, Nachtigal P. Study of the impact of cultivation conditions and peg surface modification on the in vitro biofilm formation of Staphylococcus aureus and Staphylococcus epidermidis in a system analogous to the Calgary biofilm device. J Med Microbiol 2021; 70. [PMID: 34048334 DOI: 10.1099/jmm.0.001371] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Introduction. Staphylococcus aureus (SA) and Staphylococcus epidermidis (SE) are the most common pathogens from the genus Staphylococcus causing biofilm-associated infections. Generally, biofilm-associated infections represent a clinical challenge. Bacteria in biofilms are difficult to eradicate due to their resistance and serve as a reservoir for recurring persistent infections.Gap Statement. A variety of protocols for in vitro drug activity testing against staphylococcal biofilms have been introduced. However, there are often fundamental differences. All these differences in methodical approaches can then be reflected in the form of discrepancies between results.Aim. In this study, we aimed to develop optimal conditions for staphylococcal biofilm formation on pegs. The impact of peg surface modification was also studied.Methodology. The impact of tryptic soy broth alone or supplemented with foetal bovine serum (FBS) or human plasma (HP), together with the impact of the inoculum density of bacterial suspensions and the shaking versus the static mode of cultivation, on total biofilm biomass production in SA and SE reference strains was studied. The surface of pegs was modified with FBS, HP, or poly-l-lysine (PLL). The impact on total biofilm biomass was evaluated using the crystal violet staining method and statistical data analysis.Results. Tryptic soy broth supplemented with HP together with the shaking mode led to crucial potentiation of biofilm formation on pegs in SA strains. The SE strain did not produce biofilm biomass under the same conditions on pegs. Preconditioning of peg surfaces with FBS and HP led to a statistically significant increase in biofilm biomass formation in the SE strain.Conclusion. Optimal cultivation conditions for robust staphylococcal biofilm formation in vitro might differ among different bacterial strains and methodical approaches. The shaking mode and supplementation of cultivation medium with HP was beneficial for biofilm formation on pegs for SA (ATCC 29213) and methicillin-resistant SA (ATCC 43300). Peg conditioning with HP and PLL had no impact on biofilm formation in either of these strains. Peg coating with FBS showed an adverse effect on the biofilm formation of these strains. By contrast, there was a statistically significant increase in biofilm biomass production on pegs coated with FBS and HP for SE (ATCC 35983).
Collapse
Affiliation(s)
- Adéla Diepoltová
- Charles University, Faculty of Pharmacy in Hradec Králové, Teaching and Research Centre, Czech Republic
| | - Klára Konečná
- Charles University, Faculty of Pharmacy in Hradec Králové, Teaching and Research Centre, Czech Republic
| | - Ondřej Janďourek
- Charles University, Faculty of Pharmacy in Hradec Králové, Teaching and Research Centre, Czech Republic
| | - Petr Nachtigal
- Charles University, Faculty of Pharmacy in Hradec Králové, Teaching and Research Centre, Czech Republic
| |
Collapse
|
41
|
Wang J, Zhang PL, Ansari MF, Li S, Zhou CH. Molecular design and preparation of 2-aminothiazole sulfanilamide oximes as membrane active antibacterial agents for drug resistant Acinetobacter baumannii. Bioorg Chem 2021; 113:105039. [PMID: 34091291 DOI: 10.1016/j.bioorg.2021.105039] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/18/2021] [Accepted: 05/26/2021] [Indexed: 02/06/2023]
Abstract
A series of 2-aminothiazole sulfanilamide oximes were developed as new membrane active antibacterial agents to conquer the microbial infection. Benzoyl derivative 10c was preponderant for the treatment of drug-resistant A. baumannii infection in contrast to norfloxacin and exerted excellent biocompatibility against mammalian cells including erythrocyte and LO2 cell line. Meanwhile, it had ability to eradicate established biofilm to alleviate the resistance burden. Mechanism investigation elucidated that compound 10c was able to disturb the membrane effectively and inhibit lactic dehydrogenase, which led to cytoplasmic content leakage. The cellular redox homeostasis was interfered via the production of reactive oxygen and nitrogen species (RONS), which further contributed to respiratory pathway inactivation and reduction of GSH activity. This work indicated that 2-aminothiazole sulfanilamide oximes could be a promising start for the exploitation of novel antibacterial agents against pathogens.
Collapse
Affiliation(s)
- Juan Wang
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Peng-Li Zhang
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Mohammad Fawad Ansari
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Shuo Li
- School of Chemical Engineering, Chongqing University of Technology, Chongqing 400054, PR China.
| | - Cheng-He Zhou
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| |
Collapse
|
42
|
Mehmood T, Kousar K, Arshad H, Iqbal M, Zeshan. Effect of Solvents on Extraction of Bioactive Substances from CITRULLUS COLOCYNTHIS and Their Antioxidant, Antimicrobial and Antiglycation Activities. Pharm Chem J 2021. [DOI: 10.1007/s11094-021-02411-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
43
|
Scimone A, Redfern J, Patiphatpanya P, Thongtem T, Ratova M, Kelly P, Verran J. Development of a rapid method for assessing the efficacy of antibacterial photocatalytic coatings. Talanta 2021; 225:122009. [PMID: 33592748 DOI: 10.1016/j.talanta.2020.122009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 12/08/2020] [Accepted: 12/12/2020] [Indexed: 11/28/2022]
Abstract
Visible-light activated photocatalytic coatings may represent an attractive antimicrobial solution in domains such as food, beverage, pharmaceutical, biomedical and wastewater remediation. However, testing methods to determine the antibacterial effects of photocatalytic coatings are limited and require specialist expertise. This paper describes the development of a method that enables rapid screening of coatings for photocatalytic-antibacterial activity. Relying on the ability of viable microorganisms to reduce the dye resazurin from a blue to a pink colour, the method relates the time taken to detect this colour change with number of viable microorganisms. The antibacterial activity of two photocatalytic materials (bismuth oxide and titanium dioxide) were screened against two pathogenic organisms (Escherichia coli and Klebsiella pneumoniae) that represent potential target microorganisms using traditional testing and enumeration techniques (BS ISO 27447:2009) and the novel rapid method. Bismuth oxide showed excellent antibacterial activity under ambient visible light against E. coli, but was less effective against K. pneumoniae. The rapid method showed excellent agreement with existing tests in terms of number of viable cells recovered. Due to advantages such as low cost, high throughput, and less reliance on microbiological expertise, this method is recommended for researchers seeking an inexpensive first-stage screen for putative photocatalytic-antibacterial coatings.
Collapse
Affiliation(s)
- Antony Scimone
- Department of Life Sciences, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK.
| | - James Redfern
- Department of Natural Sciences, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK
| | - Panudda Patiphatpanya
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
| | - Titipun Thongtem
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand; Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
| | - Marina Ratova
- Surface Engineering Group, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK
| | - Peter Kelly
- Surface Engineering Group, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK
| | - Joanna Verran
- Department of Life Sciences, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK.
| |
Collapse
|
44
|
Jia J, Zhang C, Liu Y, Huang Y, Bai Y, Hang X, Zeng L, Zhu D, Bi H. Armeniaspirol A: a novel anti-Helicobacter pylori agent. Microb Biotechnol 2021; 15:442-454. [PMID: 33780131 PMCID: PMC8867979 DOI: 10.1111/1751-7915.13807] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 03/11/2021] [Indexed: 12/25/2022] Open
Abstract
Antibiotic resistance in Helicobacter pylori has been growing worldwide with current treatment regimens. Development of new compounds for treatment of H. pylori infections is urgently required to achieve a successful eradication therapy in the future. Armeniaspirols, a novel class of natural products isolated from Streptomyces armeniacus, have been previously identified as antibacterial agents against Gram‐positive pathogens. In this study, we found that armeniaspirol A (ARM1) exhibited potent antibacterial activity against H. pylori, including multidrug‐resistant strains, with MIC range values of 4–16 μg ml‐1. The underlying mechanism of action of ARM1 against H. pylori involved the disruption of bacterial cell membranes. Also, ARM1 inhibited biofilm formation, eliminated preformed biofilms and killed biofilm‐encased H. pylori in a dose‐dependent manner. In a mouse model of multidrug‐resistant H. pylori infection, dual therapy with ARM1 and omeprazole showed efficient in vivo killing efficacy comparable to the standard triple therapy, and induced negligible toxicity against normal tissues. Moreover, at acidic pH 2.5, ARM1 exhibited a much more potent anti‐H. pylori activity than metronidazole. Thus, these findings demonstrated that ARM1 is a novel potent anti‐H. pylori agent, which can be developed as a promising drug lead for treatment of H. pylori infections.
Collapse
Affiliation(s)
- Jia Jia
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing, Jiangsu, 211166, China.,Department of Gastroenterology, Sir Run Run Hospital, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Chongwen Zhang
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Yaqi Liu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei, 430071, China
| | - Yanqiang Huang
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Yuefan Bai
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Xudong Hang
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Liping Zeng
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Dongqing Zhu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei, 430071, China
| | - Hongkai Bi
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing, Jiangsu, 211166, China.,Department of Gastroenterology, Sir Run Run Hospital, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| |
Collapse
|
45
|
Wang J, Ansari MF, Zhou CH. Unique para-aminobenzenesulfonyl oxadiazoles as novel structural potential membrane active antibacterial agents towards drug-resistant methicillin resistant Staphylococcus aureus. Bioorg Med Chem Lett 2021; 41:127995. [PMID: 33775834 DOI: 10.1016/j.bmcl.2021.127995] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/16/2021] [Accepted: 03/18/2021] [Indexed: 12/29/2022]
Abstract
A class of structurally unique para-aminobenzenesulfonyl oxadiazoles as new potential antimicrobial agents was designed and synthesized from acetanilide. Some target para-aminobenzenesulfonyl oxadiazoles showed antibacterial potency. Noticeably, hexyl derivative 8b (MIC = 1 μg/mL) was more active than norfloxacin against drug resistant MRSA. Compound 8b was able to disturb the membrane effectively and intercalate into deoxyribonucleic acid (DNA) to form a steady 8b-DNA complex, which might be responsible for bacterial metabolic inactivation. Molecular docking indicated that 8b could interact with DNA topoisomerase IV through noncovalent interactions to form a supramolecular complex and hinder the function of this enzyme. These results indicated that hexyl derivative 8b deserved further investigation as a new lead compound.
Collapse
Affiliation(s)
- Juan Wang
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, Southwest University, Chongqing 400715, PR China
| | - Mohammad Fawad Ansari
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, Southwest University, Chongqing 400715, PR China
| | - Cheng-He Zhou
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, Southwest University, Chongqing 400715, PR China.
| |
Collapse
|
46
|
Sato T, Uno T, Kawamura M, Fujimura S. In vitro Tolerability of Biofilm-Forming Trimethoprim-/Sulfamethoxazole-Resistant Small Colony Variants of Staphylococcus aureus Against Various Antimicrobial Agents. Microb Drug Resist 2021; 27:1282-1289. [PMID: 33689487 DOI: 10.1089/mdr.2020.0379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Trimethoprim-/sulfamethoxazole-resistant small colony variants (SCVs) of Staphylococcus aureus, which are selected by use of trimethoprim/sulfamethoxazole, are involved in intractable biofilm-forming infection. This study aimed to determine the biofilm formation ability in trimethoprim-/sulfamethoxazole-resistant SCVs of S. aureus and investigate the bactericidal activity of differential antimicrobial agents to its biofilm-forming S. aureus. Between 32 S. aureus wild type (WT) and 32 SCVs selected from its WT, the amount of formed biofilm was compared. Vancomycin, daptomycin, rifampicin, and minocycline were exposed to biofilm-forming S. aureus to determine viable bacterial counts and its susceptibility. The biofilm-producing quantify of SCVs was approximately twice that formed by its WT. Vancomycin and daptomycin reduce 4 logs the bacterial counts of biofilm-forming WT at 24 hours, but did not affect SCVs. Rifampicin and minocycline considerably decreased both WT and SCVs; however, both bacterial counts recovered to an initial number 48 hours later. These survival strains showed resistance to each drug, and rpoB mutation or tet38 mRNA overexpression was confirmed.
Collapse
Affiliation(s)
- Takumi Sato
- Division of Clinical Infectious Diseases and Chemotherapy, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Takashi Uno
- Division of Clinical Infectious Diseases and Chemotherapy, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Masato Kawamura
- Division of Clinical Infectious Diseases and Chemotherapy, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Shigeru Fujimura
- Division of Clinical Infectious Diseases and Chemotherapy, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| |
Collapse
|
47
|
Labadie M, Randrianjatovo-Gbalou I, Zaidi-Ait-Salem M, Dossat-Létisse V, Fontagné-Faucher C, Marcato-Romain CE. A dynamic resazurin microassay allowing accurate quantification of cells and suitable for acid-forming bacteria. J Microbiol Methods 2021; 183:106172. [PMID: 33610595 DOI: 10.1016/j.mimet.2021.106172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 02/16/2021] [Accepted: 02/16/2021] [Indexed: 11/18/2022]
Abstract
A resazurin micro-assay was developed to quantify acidifying bacteria. The resorufin fluorescent signal was measured over time and the determined time to reach the max slope (TMS) was plotted against CFU (colony forming unit) counts. This dynamic assay enabled to quantify nine lactic acid bacteria and a Bacillus licheniformis strain despite the increasing acidity of the medium.
Collapse
Affiliation(s)
- Maritxu Labadie
- Université de Toulouse, UPS, IUT Paul Sabatier, LBAE EA 4565 (Laboratoire de Biotechnologies Agroalimentaire et Environnementale), 24 rue d'Embaquès, Auch F-32000, France
| | | | - Meriem Zaidi-Ait-Salem
- Université de Toulouse, UPS, IUT Paul Sabatier, LBAE EA 4565 (Laboratoire de Biotechnologies Agroalimentaire et Environnementale), 24 rue d'Embaquès, Auch F-32000, France
| | - Valérie Dossat-Létisse
- Université de Toulouse, UPS, IUT Paul Sabatier, LBAE EA 4565 (Laboratoire de Biotechnologies Agroalimentaire et Environnementale), 24 rue d'Embaquès, Auch F-32000, France
| | - Catherine Fontagné-Faucher
- Université de Toulouse, UPS, IUT Paul Sabatier, LBAE EA 4565 (Laboratoire de Biotechnologies Agroalimentaire et Environnementale), 24 rue d'Embaquès, Auch F-32000, France
| | - Claire-Emmanuelle Marcato-Romain
- Université de Toulouse, UPS, IUT Paul Sabatier, LBAE EA 4565 (Laboratoire de Biotechnologies Agroalimentaire et Environnementale), 24 rue d'Embaquès, Auch F-32000, France.
| |
Collapse
|
48
|
Ramzan M, Ahmed A, Usmani Y, Siddiqui AJ, Bhatti MS, Musharraf SG. Flow Injection-High Resolution-Electrospray Ionization-Mass Spectrometry (FI-HR-ESI-MS) Method for the Screening of Antimicrobial Pharmaceutical Drugs and Compounds against Klebsiella pneumoniae. Eur J Pharm Sci 2021; 157:105633. [PMID: 33130071 DOI: 10.1016/j.ejps.2020.105633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 10/26/2020] [Accepted: 10/26/2020] [Indexed: 01/07/2023]
Abstract
The development of drug resistant microorganism is a global threat. Therefore, screening of more compounds for antimicrobial potentials is needed. Hence, a rapid method was developed for the screening of antimicrobial drugs and compounds against Klebsiella pneumoniae using Flow Injection Analysis-High Resolution-Mass Spectrometry. The method was optimized for bacterial culture time and concentration of drugs. IC50 values for the drugs were calculated from the percent intensity of 704.5207 m/z of K. pneumoniae at 5 hrs incubation. This mass was proposed as diacylglycerophosphoethanolamine and observed as a potential biomarker of K. pneumoniae for the evaluation of inhibition potential of antimicrobial drugs and compounds. The calculated values for half maximal inhibitory concentration of cefixime, gentamicin and enrofloxacin were 0.052, 0.028 and 0.042 µg/mL, respectively. Ten compounds were also screened against the developed method, among them one compound (RSE-6) was found to be active with IC50 value of 45.08 µg/mL. The obtained results were further compared with MIC values, obtained from micro dilution and Alamar blue assay after 24 hrs incubation. In comparison to these methods, developed method is sensitive, reproducible, rapid and robust for the determination of IC50 value or inhibition potential of the drugs and compounds even at early incubation period of 5 hours.
Collapse
Affiliation(s)
- Muhammad Ramzan
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Ayaz Ahmed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Yamina Usmani
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Amna Jabbar Siddiqui
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Muhammad Salman Bhatti
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Syed Ghulam Musharraf
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan; Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan.
| |
Collapse
|
49
|
Structural and functional analysis of the Francisella lysine decarboxylase as a key actor in oxidative stress resistance. Sci Rep 2021; 11:972. [PMID: 33441661 PMCID: PMC7806604 DOI: 10.1038/s41598-020-79611-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 12/07/2020] [Indexed: 01/29/2023] Open
Abstract
Francisella tularensis is one of the most virulent pathogenic bacteria causing the acute human respiratory disease tularemia. While the mechanisms underlying F. tularensis pathogenesis are largely unknown, previous studies have shown that a F. novicida transposon mutant with insertions in a gene coding for a putative lysine decarboxylase was attenuated in mouse spleen, suggesting a possible role of its protein product as a virulence factor. Therefore, we set out to structurally and functionally characterize the F. novicida lysine decarboxylase, which we termed LdcF. Here, we investigate the genetic environment of ldcF as well as its evolutionary relationships with other basic AAT-fold amino acid decarboxylase superfamily members, known as key actors in bacterial adaptative stress response and polyamine biosynthesis. We determine the crystal structure of LdcF and compare it with the most thoroughly studied lysine decarboxylase, E. coli LdcI. We analyze the influence of ldcF deletion on bacterial growth under different stress conditions in dedicated growth media, as well as in infected macrophages, and demonstrate its involvement in oxidative stress resistance. Finally, our mass spectrometry-based quantitative proteomic analysis enables identification of 80 proteins with expression levels significantly affected by ldcF deletion, including several DNA repair proteins potentially involved in the diminished capacity of the F. novicida mutant to deal with oxidative stress. Taken together, we uncover an important role of LdcF in F. novicida survival in host cells through participation in oxidative stress response, thereby singling out this previously uncharacterized protein as a potential drug target.
Collapse
|
50
|
Hashim J, Arshad N, Yaseen M, Khan R, Iqbal T, Zehra Hamid S, Kanwal A, Safi I, Ullah I. 3,5-Disubstituted Tetrahydro-2H-1,3,5-thiadiazine-thiones Ester Derivatives and Their Antimicrobial Evaluation. HETEROCYCLES 2021. [DOI: 10.3987/com-20-14402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|