1
|
Potvin M, Larranaga Lapique E, Hites M, Martiny D. Implementing Alfred60 AST in a clinical lab: Clinical impact on the management of septic patients and financial analysis. Ann Pharm Fr 2023; 81:466-474. [PMID: 36402206 DOI: 10.1016/j.pharma.2022.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/22/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Sepsis is an important cause of morbidity and mortality. An accelerated microbiology diagnosis is crucial in order to reduce the time to initiate targeted antibiotic therapy. The Alfred60AST system is able to provide phenotypic Antimicrobial Susceptibility Testing (AST) results within hours. This study has two objectives: assess the clinical impact of this technology and determine its cost-effectiveness. METHODS During a ten-week period, all new enterobacterial or enterococcal bloodstream infection was analyzed with the Alfred60AST system, in parallel with routine methods. Its impact on the clinician's therapeutic strategy was studied. In order to assess the financial and practical aspects of the method, an analysis of the extracosts and a survey of the technical staff were conducted. RESULTS Fifty-three cases of bacteriemia were included. For the Enterobacteriaceae bacteriemias, a clinical impact was shown in 18.9% of the cases (e.g, treatment modification). The financial analysis highlighted an increase in costs (+38% for Enterobacteriaceae, +50% for Enterococci), compared to the theoretical costs reported by the firm, due to the workflow and the volumes of samples used. Finally, results of the technical staff survey were favorable in terms of ease of use of the system. CONCLUSION In addition to its ease of use, the Alfred60AST system is able to provide an AST in a record time. This study shows a real interest of the technique in the therapeutic management of patients with enterobacterial sepsis. However, its routine implementation requires an increase of the analyzed volumes as well as a 24/7 organization of the laboratory in order to be profitable.
Collapse
Affiliation(s)
- M Potvin
- Microbiology Department, LHUB-ULB, rue haute, 322, 1000 Brussels, Belgium.
| | - E Larranaga Lapique
- Department of Infectious Disease, Erasme Hospital, route de Lennik, 808, 1070 Brussels, Belgium
| | - M Hites
- Department of Infectious Disease, Erasme Hospital, route de Lennik, 808, 1070 Brussels, Belgium
| | - D Martiny
- Microbiology Department, LHUB-ULB, rue haute, 322, 1000 Brussels, Belgium
| |
Collapse
|
2
|
Chen J, San SSS, Kung A, Tomasek M, Liu D, Rodgers W, Gau V. Direct-from-specimen microbial growth inhibition spectrums under antibiotic exposure and comparison to conventional antimicrobial susceptibility testing. PLoS One 2022; 17:e0263868. [PMID: 35171945 PMCID: PMC8849476 DOI: 10.1371/journal.pone.0263868] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 12/29/2021] [Indexed: 11/30/2022] Open
Abstract
Increasing global travel and changes in the environment may escalate the frequency of contact with a natural host carrying an infection and, therefore, increase our chances of encountering microorganisms previously unknown to humans. During an emergency, the etiology of infection may be unknown at the time of patient treatment. The existing local or global Antimicrobial Stewardship Programs may not be fully prepared for emerging/re-emerging infectious disease outbreaks, especially if they are caused by an unknown organism, engineered bioterrorist attack, or rapidly evolving superbug. We demonstrate an antimicrobial efficacy profiling method that can be performed in hours directly from clinical urine specimens. The antimicrobial potency was determined by the level of microbial growth inhibition and compared to conventional antimicrobial susceptibility testing results. The oligonucleotide probe pairs on the sensors were designed to target Gram-negative bacteria, specifically Enterobacterales and Pseudomonas aeruginosa. A pilot study of 10 remnant clinical specimens from the Clinical Laboratory Improvement Amendments-certified labs of New York-Presbyterian Queens was conducted, and only one sample was not detected by the probes. The remaining nine samples agreed with reference AST methods (Vitek and broth microdilution), resulting in 100% categorical agreement. In a separate feasibility study, we evaluated a dual-kinetic response approach, in which we inoculated two antibiotic stripwells containing the same antimicrobial concentrations with clinical specimens at the original concentration (1x) and at a 10-fold dilution (0.1x) to cover a broader range of microbiological responses. The combined categorical susceptibility reporting of 12 contrived urine specimens was 100% for ciprofloxacin, gentamicin, and meropenem over a range of microbial loads from 105 to 108 CFU/mL.
Collapse
Affiliation(s)
- Jade Chen
- GeneFluidics, Los Angeles, California, United States of America
| | - Su Su Soe San
- GeneFluidics, Los Angeles, California, United States of America
| | - Amelia Kung
- GeneFluidics, Los Angeles, California, United States of America
| | - Michael Tomasek
- GeneFluidics, Los Angeles, California, United States of America
| | - Dakai Liu
- Department of Pathology and Clinical Laboratories, New York-Presbyterian Queens, Flushing, New York, United States of America
| | - William Rodgers
- Department of Pathology and Clinical Laboratories, New York-Presbyterian Queens, Flushing, New York, United States of America
- Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York City, New York, United States of America
| | - Vincent Gau
- GeneFluidics, Los Angeles, California, United States of America
- * E-mail:
| |
Collapse
|
3
|
Hou B, Zhang YM, Liao HY, Fu LF, Li DD, Zhao X, Qi JX, Yang W, Xiao GF, Yang L, Zuo ZY, Wang L, Zhang XL, Bai F, Yang L, Gao GF, Song H, Hu JM, Shang WJ, Zhou J. Target-Based Virtual Screening and LC/MS-Guided Isolation Procedure for Identifying Phloroglucinol-Terpenoid Inhibitors of SARS-CoV-2. J Nat Prod 2022; 85:327-336. [PMID: 35084181 PMCID: PMC8806002 DOI: 10.1021/acs.jnatprod.1c00805] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Indexed: 05/09/2023]
Abstract
The coronavirus disease 2019 (COVID-19) pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has led to more than 5 million deaths worldwide to date. Due to the limited therapeutic options so far available, target-based virtual screening with LC/MS support was applied to identify the novel and high-content compounds 1-4 with inhibitory effects on SARS-CoV-2 in Vero E6 cells from the plant Dryopteris wallichiana. These compounds were also evaluated against SARS-CoV-2 in Calu-3 cells and showed unambiguous inhibitory activity. The inhibition assay of targets showed that compounds 3 and 4 mainly inhibited SARS-CoV-2 3CLpro, with effective Kd values. Through docking and molecular dynamics modeling, the binding site is described, providing a comprehensive understanding of 3CLpro and interactions for 3, including hydrogen bonds, hydrophobic bonds, and the spatial occupation of the B ring. Compounds 3 and 4 represent new, potential lead compounds for the development of anti-SARS-CoV-2 drugs. This study has led to the development of a target-based virtual screening method for exploring the potency of natural products and for identifying natural bioactive compounds for possible COVID-19 treatment.
Collapse
Affiliation(s)
- Bo Hou
- State Key Laboratory of Phytochemistry and Plant
Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry,
Kunming Institute of Botany, Chinese Academy of Sciences,
Kunming 650201, People’s Republic of China
| | - Yu-Min Zhang
- State Key Laboratory of Virology, Wuhan
Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of
Sciences, Wuhan 430071, People’s Republic of
China
| | - Han-Yi Liao
- CAS Key Laboratory of Pathogenic Microbiology and
Immunology, Institute of Microbiology, Chinese Academy of
Sciences, Beijing 100101, People’s Republic of
China
| | - Li-Feng Fu
- CAS Key Laboratory of Pathogenic Microbiology and
Immunology, Institute of Microbiology, Chinese Academy of
Sciences, Beijing 100101, People’s Republic of
China
| | - De-Dong Li
- CAS Key Laboratory of Pathogenic Microbiology and
Immunology, Institute of Microbiology, Chinese Academy of
Sciences, Beijing 100101, People’s Republic of
China
| | - Xin Zhao
- CAS Key Laboratory of Pathogenic Microbiology and
Immunology, Institute of Microbiology, Chinese Academy of
Sciences, Beijing 100101, People’s Republic of
China
| | - Jian-Xun Qi
- CAS Key Laboratory of Pathogenic Microbiology and
Immunology, Institute of Microbiology, Chinese Academy of
Sciences, Beijing 100101, People’s Republic of
China
| | - Wei Yang
- CAS Key Laboratory of Pathogenic Microbiology and
Immunology, Institute of Microbiology, Chinese Academy of
Sciences, Beijing 100101, People’s Republic of
China
| | - Geng-Fu Xiao
- State Key Laboratory of Virology, Wuhan
Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of
Sciences, Wuhan 430071, People’s Republic of
China
| | - Lian Yang
- State Key Laboratory of Phytochemistry and Plant
Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry,
Kunming Institute of Botany, Chinese Academy of Sciences,
Kunming 650201, People’s Republic of China
| | - Zheng-Yu Zuo
- State Key Laboratory of Phytochemistry and Plant
Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry,
Kunming Institute of Botany, Chinese Academy of Sciences,
Kunming 650201, People’s Republic of China
| | - Lin Wang
- Shanghai Institute for Advanced Immunochemical Studies
and School of Life Science and Technology, Shanghai Tech
University, Shanghai 201210, People’s Republic of
China
| | - Xiang-Lei Zhang
- Shanghai Institute for Advanced Immunochemical Studies
and School of Life Science and Technology, Shanghai Tech
University, Shanghai 201210, People’s Republic of
China
| | - Fang Bai
- Shanghai Institute for Advanced Immunochemical Studies
and School of Life Science and Technology, Shanghai Tech
University, Shanghai 201210, People’s Republic of
China
| | - Liu Yang
- State Key Laboratory of Phytochemistry and Plant
Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry,
Kunming Institute of Botany, Chinese Academy of Sciences,
Kunming 650201, People’s Republic of China
| | - George F. Gao
- CAS Key Laboratory of Pathogenic Microbiology and
Immunology, Institute of Microbiology, Chinese Academy of
Sciences, Beijing 100101, People’s Republic of
China
| | - Hao Song
- CAS Key Laboratory of Pathogenic Microbiology and
Immunology, Institute of Microbiology, Chinese Academy of
Sciences, Beijing 100101, People’s Republic of
China
- Research Network of Immunity and Health (RNIH),
Beijing Institutes of Life Science, Chinese Academy of
Sciences, Beijing 100101, People’s Republic of
China
| | - Jiang-Miao Hu
- State Key Laboratory of Phytochemistry and Plant
Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry,
Kunming Institute of Botany, Chinese Academy of Sciences,
Kunming 650201, People’s Republic of China
| | - Wei-Juan Shang
- State Key Laboratory of Virology, Wuhan
Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of
Sciences, Wuhan 430071, People’s Republic of
China
| | - Jun Zhou
- State Key Laboratory of Phytochemistry and Plant
Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry,
Kunming Institute of Botany, Chinese Academy of Sciences,
Kunming 650201, People’s Republic of China
| |
Collapse
|
4
|
Elshafie HS, Sadeek SA, Camele I, Mohamed AA. Biochemical Characterization of New Gemifloxacin Schiff Base (GMFX-o-phdn) Metal Complexes and Evaluation of Their Antimicrobial Activity against Some Phyto- or Human Pathogens. Int J Mol Sci 2022; 23:ijms23042110. [PMID: 35216223 PMCID: PMC8877648 DOI: 10.3390/ijms23042110] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/07/2022] [Accepted: 02/11/2022] [Indexed: 02/06/2023] Open
Abstract
Four novel ligand-metal complexes were synthesized through the reaction of Fe(III), pleaseCo(II), Zn(II), and Zr(IV) with Schiff base gemifloxacin reacted with ortho-phenylenediamine (GMFX-o-phdn) to investigate their biological activities. Elemental analysis, FT-IR, 1H NMR, UV-visible, molar conductance, melting points, magnetic susceptibility, and thermal analyses have been carried out for insuring the chelation process. The antimicrobial activity was carried out against Monilinia fructicola, Aspergillus flavus, Penicillium italicum, Botrytis cinerea, Escherichia coli, Bacillus cereus, Pseudomonas fluorescens, and P. aeruginosa. The radical scavenging activity (RSA%) was in vitro evaluated using ABTS method. FT-IR spectra indicated that GMFX-o-phdn chelated with metal ions as a tetradentate through oxygen of carboxylate group and nitrogen of azomethine group. The data of infrared, 1H NMR, and molar conductivity indicate that GMFX–o-phdn reacted as neutral tetra dentate ligand (N2O2) with metal ions through the two oxygen atoms of the carboxylic group (oxygen containing negative charge) and two nitrogen atoms of azomethine group (each nitrogen containing a lone pair of electrons) (the absent of peak corresponding to ν(COOH) at 1715 cm−1, the shift of azomethine group peak from 1633 cm−1 to around 1570 cm−1, the signal at 11 ppm of COOH and the presence of the chloride ions outside the complex sphere). Thermal analyses (TG-DTG/DTA) exhibited that the decaying of the metal complexes exists in three steps with the final residue metal oxide. The obtained data from DTA curves reflect that the degradation processes were exothermic or endothermic. Results showed that some of the studied complexes exhibited promising antifungal activity against most of the tested fungal pathogens, whereas they showed higher antibacterial activity against E. coli and B. cereus and low activity against P. fluorescens and P. aeruginosa. In addition, GMFX-o-phdn and its metal complexes showed strong antioxidant effect. In particular, the parent ligand and Fe(III) complex showed greater antioxidant capacity at low tested concentrations than that of other metal complexes where their IC50 were 169.7 and 164.6 µg/mL, respectively.
Collapse
Affiliation(s)
- Hazem S. Elshafie
- School of Agricultural, Forestry, Food and Environmental Sciences, University of Basilicata, 85100 Potenza, Italy;
| | - Sadeek A. Sadeek
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt;
| | - Ippolito Camele
- School of Agricultural, Forestry, Food and Environmental Sciences, University of Basilicata, 85100 Potenza, Italy;
- Correspondence: ; Tel.: +39-0971-205544; Fax: +39-0971-205503
| | - Amira A. Mohamed
- Department of Basic Science, Zagazig Higher Institute of Engineering and Technology, Zagazig 44519, Egypt;
| |
Collapse
|
5
|
Khan NA, Kaur N, Owens P, Thomas OP, Boyd A. Bis-Indole Alkaloids Isolated from the Sponge Spongosorites calcicola Disrupt Cell Membranes of MRSA. Int J Mol Sci 2022; 23:ijms23041991. [PMID: 35216106 PMCID: PMC8874442 DOI: 10.3390/ijms23041991] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/06/2022] [Accepted: 02/08/2022] [Indexed: 02/01/2023] Open
Abstract
Antimicrobial resistance (AMR) is a global health challenge with methicillin resistant Staphylococcus aureus (MRSA), a leading cause of nosocomial infection. In the search for novel antibiotics, marine sponges have become model organisms as they produce diverse bioactive compounds. We investigated and compared the antibacterial potential of 3 bis-indole alkaloids—bromodeoxytopsentin, bromotopsentin and spongotine A—isolated from the Northeastern Atlantic sponge Spongosorites calcicola. Antimicrobial activity was determined by MIC and time-kill assays. The mechanism of action of bis-indoles was assessed using bacterial cytological profiling via fluorescence microscopy. Finally, we investigated the ability of bis-indole alkaloids to decrease the cytotoxicity of pathogens upon co-incubation with HeLa cells through the measurement of mammalian cell lysis. The bis-indoles were bactericidal to clinically relevant Gram-positive pathogens including MRSA and to the Gram-negative gastroenteric pathogen Vibrio parahaemolyticus. Furthermore, the alkaloids were synergistic in combination with conventional antibiotics. Antimicrobial activity of the bis-indole alkaloids was due to rapid disruption and permeabilization of the bacterial cell membrane. Significantly, the bis-indoles reduced pathogen cytotoxicity toward mammalian cells, indicating their ability to prevent bacterial virulence. In conclusion, sponge bis-indole alkaloids are membrane-permeabilizing agents that represent good antibiotic candidates because of their potency against Gram-positive and Gram-negative bacterial pathogens.
Collapse
Affiliation(s)
- Neyaz A. Khan
- Discipline of Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland;
| | - Navdeep Kaur
- Discipline of Chemistry, School of Biological and Chemical Science and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland; (N.K.); (O.P.T.)
| | - Peter Owens
- Centre for Microscopy and Imaging, National University of Ireland, Galway, H91 TK33 Galway, Ireland;
| | - Olivier P. Thomas
- Discipline of Chemistry, School of Biological and Chemical Science and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland; (N.K.); (O.P.T.)
| | - Aoife Boyd
- Discipline of Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland;
- Correspondence: ; Tel.: +353-(0)91-492404
| |
Collapse
|
6
|
Narasimhan J, Letinski S, Jung SP, Gerasyuto A, Wang J, Arnold M, Chen G, Hedrick J, Dumble M, Ravichandran K, Levitz T, Cui C, Drennan CL, Stubbe J, Karp G, Branstrom A. Ribonucleotide reductase, a novel drug target for gonorrhea. eLife 2022; 11:e67447. [PMID: 35137690 PMCID: PMC8865847 DOI: 10.7554/elife.67447] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 02/08/2022] [Indexed: 11/13/2022] Open
Abstract
Antibiotic-resistant Neisseria gonorrhoeae (Ng) are an emerging public health threat due to increasing numbers of multidrug resistant (MDR) organisms. We identified two novel orally active inhibitors, PTC-847 and PTC-672, that exhibit a narrow spectrum of activity against Ng including MDR isolates. By selecting organisms resistant to the novel inhibitors and sequencing their genomes, we identified a new therapeutic target, the class Ia ribonucleotide reductase (RNR). Resistance mutations in Ng map to the N-terminal cone domain of the α subunit, which we show here is involved in forming an inhibited α4β4 state in the presence of the β subunit and allosteric effector dATP. Enzyme assays confirm that PTC-847 and PTC-672 inhibit Ng RNR and reveal that allosteric effector dATP potentiates the inhibitory effect. Oral administration of PTC-672 reduces Ng infection in a mouse model and may have therapeutic potential for treatment of Ng that is resistant to current drugs.
Collapse
Affiliation(s)
| | | | | | | | - Jiashi Wang
- PTC Therapeutics, IncSouth PlainfieldUnited States
| | | | | | - Jean Hedrick
- PTC Therapeutics, IncSouth PlainfieldUnited States
| | | | - Kanchana Ravichandran
- Department of Chemistry, Massachusetts Institute of TechnologyCambridgeUnited States
| | - Talya Levitz
- Department of Biology, Massachusetts Institute of TechnologyCambridgeUnited States
| | - Chang Cui
- Department of Chemistry and Chemical Biology, Harvard UniversityCambridgeUnited States
| | - Catherine L Drennan
- Department of Chemistry, Massachusetts Institute of TechnologyCambridgeUnited States
- Department of Biology, Massachusetts Institute of TechnologyCambridgeUnited States
- Howard Hughes Medical Institute, Massachusetts Institute of TechnologyCambridgeUnited States
| | - JoAnne Stubbe
- Department of Chemistry, Massachusetts Institute of TechnologyCambridgeUnited States
- Department of Biology, Massachusetts Institute of TechnologyCambridgeUnited States
| | - Gary Karp
- PTC Therapeutics, IncSouth PlainfieldUnited States
| | | |
Collapse
|
7
|
Ekom SE, Tamokou JDD, Kuete V. Methanol extract from the seeds of Persea americana displays antibacterial and wound healing activities in rat model. J Ethnopharmacol 2022; 282:114573. [PMID: 34464699 DOI: 10.1016/j.jep.2021.114573] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 07/31/2021] [Accepted: 08/26/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Persea americana Miller (Lauraceae) known as "pear" in Cameroon is comestible by the fruit. The leaves of the plant are traditionally used in the treatment of microbial infections, malaria, diabetes, high blood pressure, to stimulate uterine contractions and relief painful menstruations. The leaves and stem bark are also used to cure malaria and typhoid fever. Fresh pulps are used to lower cholesterol, prevents mental strain and cardiovascular diseases whilst the seeds are used against intestinal worms and skin infections. AIM OF THE STUDY This study aimed to investigate the antibacterial activity and wound healing efficacy of methanol extract of Persea americana seed on an excision wound infected with Staphylococcus aureus using a rat model and characterise the mode of action of this extract. MATERIALS AND METHODS The antibacterial activities of the methanol extract were done against a panel of bacteria using broth microdilution method. The phytochemical analysis as well as the antioxidant activities were evaluated using colorimetric methods. The mode of action of P. americana was studied by targeting bacterial membranes, cytoplasmic contents, and the formation of biofilms. The therapeutic effect of the methanol extract was evaluated on an excision wound infected with Staphylococcus aureus. RESULTS The methanol extract of P. americana seed displayed antibacterial properties MIC varying from 64 to 128 μg/mL which can be linked to its total phenolic, flavonoid and tannin contents. The antibacterial activity of the extract is due to the bacterial biofilm inhibition and the perturbation of the bacterial membrane through the leakage of intracellular materials, the inhibition of H+-ATPases pumps. The gel based on P. americana extract showed a significant increase in the percentage of wound closure and had a significant reduction of the number of Colony Forming Units (CFU) of S. aureus at the infection site. The plant has antioxidant activity for wound healing which is lower than vitamin C. The toxicological report showed that the gel-based extract had negligible irritation on the skin and non-irritating to the eye, and therefore can be consider safe for use. CONCLUSION The present study revealed the antibacterial and wound healing properties of the MEPa and could possibly be used to tackle bacterial infections.
Collapse
Affiliation(s)
- Steve E Ekom
- Department of Biochemistry, Faculty of Science, University of Dschang, Cameroon.
| | - Jean-De-Dieu Tamokou
- Department of Biochemistry, Faculty of Science, University of Dschang, Cameroon.
| | - Victor Kuete
- Department of Biochemistry, Faculty of Science, University of Dschang, Cameroon.
| |
Collapse
|
8
|
Job V, Laloy J, Maloteau V, Haye E, Lucas S, Penninckx S. Investigation of the Antibacterial Properties of Silver-Doped Amorphous Carbon Coatings Produced by Low Pressure Magnetron Assisted Acetylene Discharges. Int J Mol Sci 2022; 23:ijms23010563. [PMID: 35008988 PMCID: PMC8745043 DOI: 10.3390/ijms23010563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 12/24/2021] [Indexed: 02/01/2023] Open
Abstract
Hospital-acquired infections are responsible for a significant part of morbidity and mortality. Among the possible modes of transmission, this study focuses on environmental surfaces by developing innovative antibacterial coatings that can be applied on interior fittings in hospitals. This work aims to optimize a coating made of an amorphous carbon matrix doped with silver (a-C:H:Ag) produced by a hybrid PVD/PECVD process and to evaluate its antibacterial activity. We present a coating characterization (chemical composition and morphology) as well as its stability in an ageing process and after multiple exposures to bacteria. The antibacterial activity of the coatings is demonstrated against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) bacteria through several bioassays. Moreover, the data suggest a crucial role of silver diffusion towards the surface and nanoparticle formation to explain the very promising anti-bacterial activities reported in this work.
Collapse
Affiliation(s)
- Valentin Job
- LARN Laboratory (LARN-NARILIS), University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium; (V.J.); (E.H.); (S.P.)
| | - Julie Laloy
- Laboratory (NNC-NARILIS), Department of Pharmacy, University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium; (J.L.); (V.M.)
| | - Vincent Maloteau
- Laboratory (NNC-NARILIS), Department of Pharmacy, University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium; (J.L.); (V.M.)
| | - Emile Haye
- LARN Laboratory (LARN-NARILIS), University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium; (V.J.); (E.H.); (S.P.)
- Innovative Coating Solutions (ICS), University of Namur, 11 Place Saint Pierre, B-5380 Forville, Belgium
| | - Stéphane Lucas
- LARN Laboratory (LARN-NARILIS), University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium; (V.J.); (E.H.); (S.P.)
- Innovative Coating Solutions (ICS), University of Namur, 11 Place Saint Pierre, B-5380 Forville, Belgium
- Correspondence: ; Tel.: +32-498-97-52-82
| | - Sébastien Penninckx
- LARN Laboratory (LARN-NARILIS), University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium; (V.J.); (E.H.); (S.P.)
- Medical Physics Department, Institut Jules Bordet, Université Libre de Bruxelles, 1 Rue Héger-Bordet, B-1000 Brussels, Belgium
| |
Collapse
|
9
|
Hayat S, Ashraf A, Zubair M, Aslam B, Siddique MH, Khurshid M, Saqalein M, Khan AM, Almatroudi A, Naeem Z, Muzammil S. Biofabrication of ZnO nanoparticles using Acacia arabica leaf extract and their antibiofilm and antioxidant potential against foodborne pathogens. PLoS One 2022; 17:e0259190. [PMID: 34986148 PMCID: PMC8730432 DOI: 10.1371/journal.pone.0259190] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 10/14/2021] [Indexed: 02/06/2023] Open
Abstract
Emergence of multidrug resistant pathogens is increasing globally at an alarming rate with a need to discover novel and effective methods to cope infections due to these pathogens. Green nanoparticles have gained attention to be used as efficient therapeutic agents because of their safety and reliability. In the present study, we prepared zinc oxide nanoparticles (ZnO NPs) from aqueous leaf extract of Acacia arabica. The nanoparticles produced were characterized through UV-Visible spectroscopy, scanning electron microscopy, and X-ray diffraction. In vitro antibacterial susceptibility testing against foodborne pathogens was done by agar well diffusion, growth kinetics and broth microdilution assays. Effect of ZnO NPs on biofilm formation (both qualitatively and quantitatively) and exopolysaccharide (EPS) production was also determined. Antioxidant potential of green synthesized nanoparticles was detected by DPPH radical scavenging assay. The cytotoxicity studies of nanoparticles were also performed against HeLa cell lines. The results revealed that diameter of zones of inhibition against foodborne pathogens was found to be 16-30 nm, whereas the values of MIC and MBC ranged between 31.25-62.5 μg/ml. Growth kinetics revealed nanoparticles bactericidal potential after 3 hours incubation at 2 × MIC for E. coli while for S. aureus and S. enterica reached after 2 hours of incubation at 2 × MIC, 4 × MIC, and 8 × MIC. 32.5-71.0% inhibition was observed for biofilm formation. Almost 50.6-65.1% (wet weight) and 44.6-57.8% (dry weight) of EPS production was decreased after treatment with sub-inhibitory concentrations of nanoparticles. Radical scavenging potential of nanoparticles increased in a dose dependent manner and value ranged from 19.25 to 73.15%. Whereas cytotoxicity studies revealed non-toxic nature of nanoparticles at the concentrations tested. The present study suggests that green synthesized ZnO NPs can substitute chemical drugs against antibiotic resistant foodborne pathogens.
Collapse
Affiliation(s)
- Sumreen Hayat
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | - Asma Ashraf
- Department of Zoology, Government College University, Faisalabad, Pakistan
| | - Muhammad Zubair
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Bilal Aslam
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | | | - Mohsin Khurshid
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | - Muhammad Saqalein
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | | | - Ahmad Almatroudi
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Buraydah, Saudi Arabia
| | - Zilursh Naeem
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | - Saima Muzammil
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| |
Collapse
|
10
|
He XJ, Zeng XP, Jiang CS, Liu G, Li DZ, Wang W. Efficacy and Safety of Antofloxacin-Based Triple Therapy for Helicobacter pylori Eradication Failure in China. Dig Dis Sci 2022; 67:208-215. [PMID: 33559090 DOI: 10.1007/s10620-021-06856-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 01/17/2021] [Indexed: 02/08/2023]
Abstract
AIMS Quinolone-containing triple therapy has been considered as the second-line therapy for eradication of Helicobacter pylori (H. pylori). At present, there are no data to show the efficacy and safety of antofloxacin-based rescue therapy for the eradication of H. pylori, and this pilot clinical trial was designed. METHODS A total of 196 patients who failed H. pylori eradication using the clarithromycin-based or metronidazole-based triple or bismuth quadruple therapy were randomly allocated to one of the following rescue eradication therapy groups: AEA group (antofloxacin 200 mg once daily, esomeprazole 20 mg + amoxicillin 1000 mg twice daily) for 14 days, or LEA group (levofloxacin 500 mg once daily, esomeprazole 20 mg + amoxicillin 1000 mg twice daily) for 14 days. The minimal inhibitory concentrations were tested by the E-test method. The gyrA mutation was analyzed by sequencing. Follow-up 13/14C-urea breath test was examined at 1 month after discontinuation. RESULTS A total of 178 eligible patients were included in this study. The eradication rate was significantly higher in AEA group than in LEA group according to both ITT (87.6% vs. 68.5%; P = 0.002) and PP analyses (90.7% vs. 70.1%; P = 0.001). ITT analyses indicated that the eradication rate was significantly higher in AEA group than in LEA group with Asn87 mutation (78.9% vs. 31.3%; P = 0.005) and levofloxacin-resistant strains (76.9% vs. 44.2%; P = 0.003). Two groups exhibited similar adverse event rates (AEA 14.6% vs. LEA 20.2%, P = 0.323). CONCLUSIONS The findings showed that antofloxacin may be a promising candidate in rescue therapy for H. pylori eradication failure in China.
Collapse
Affiliation(s)
- Xiao-Jian He
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
- Fuzhou General Clinical Medical College, Fujian Medical University, Fuzhou, China
- Oriental Hospital Affiliated To Xiamen University, Fuzhou, China
| | - Xiang-Peng Zeng
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
- Fuzhou General Clinical Medical College, Fujian Medical University, Fuzhou, China
- Oriental Hospital Affiliated To Xiamen University, Fuzhou, China
| | - Chuan-Shen Jiang
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
- Fuzhou General Clinical Medical College, Fujian Medical University, Fuzhou, China
- Oriental Hospital Affiliated To Xiamen University, Fuzhou, China
| | - Gang Liu
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
- Fuzhou General Clinical Medical College, Fujian Medical University, Fuzhou, China
- Oriental Hospital Affiliated To Xiamen University, Fuzhou, China
| | - Da-Zhou Li
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China
- Fuzhou General Clinical Medical College, Fujian Medical University, Fuzhou, China
- Oriental Hospital Affiliated To Xiamen University, Fuzhou, China
| | - Wen Wang
- Department of Digestive Diseases, 900TH Hospital of Joint Logistics Support Force, 156 North Road of West No.2 Ring, Fuzhou, 350025, China.
- Fuzhou General Clinical Medical College, Fujian Medical University, Fuzhou, China.
- Oriental Hospital Affiliated To Xiamen University, Fuzhou, China.
| |
Collapse
|
11
|
Leeman HM, Chan BP, Zimmermann CR, Talbot EA, Calderwood MS, Dave AR, Santos P, Hansen KE. Creation of State Antibiogram and Subsequent Launch of Public Health-Coordinated Antibiotic Stewardship in New Hampshire: Small State, Big Collaboration. Public Health Rep 2022; 137:72-80. [PMID: 33673775 PMCID: PMC8721761 DOI: 10.1177/0033354921995778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND An antibiogram is a summary of antibiotic susceptibility patterns for selected bacterial pathogens and antibiotics. The New Hampshire Department of Health and Human Services' Division of Public Health Services (DPHS) sought to create an annual state antibiogram to monitor statewide antibiotic resistance trends, guide appropriate empiric antibiotic prescribing, and inform future statewide antibiotic stewardship. METHODS Through legislative authority, DPHS required hospital laboratories to report antibiogram data annually. DPHS convened an advisory group of infectious disease and pharmacy stakeholders and experts to develop a standardized reporting form for bacteria and antibiotic susceptibility, which was disseminated to all 26 hospitals in New Hampshire. We combined the reported data into a statewide antibiogram, and we created clinical messaging to highlight findings and promote rational antibiotic prescribing among health care providers. RESULTS All hospital laboratories in New Hampshire submitted annual antibiogram data for 2016 and 2017, including more than 30 000 and 20 000 bacterial isolates recovered from urine and nonurine cultures, respectively, each year. The advisory group created clinical messages for appropriate treatment of common infectious syndromes, including uncomplicated urinary tract infections, community-acquired pneumonia, skin and soft-tissue infections, intra-abdominal infections, and health care-associated gram-negative aerobic infections. The statewide antibiograms and clinical messaging were widely disseminated. CONCLUSIONS The small size of New Hampshire, a centralized public health structure, and close working relationships with hospitals and clinical partners allowed for efficient creation and dissemination of an annual statewide antibiogram, which has fostered public health-clinical partnerships and built a foundation for future state-coordinated antibiotic stewardship. This process serves as a model for other jurisdictions that are considering antibiogram development.
Collapse
Affiliation(s)
- Hannah M Leeman
- New Hampshire Department of Health and Human Services, Concord, NH, USA
| | - Benjamin P Chan
- New Hampshire Department of Health and Human Services, Concord, NH, USA
| | | | - Elizabeth A Talbot
- New Hampshire Department of Health and Human Services, Concord, NH, USA
- Geisel School of Medicine at Dartmouth, Hanover, NH, USA
- Dartmouth Hitchcock Medical Center, Lebanon, NH, USA
| | - Michael S Calderwood
- Geisel School of Medicine at Dartmouth, Hanover, NH, USA
- Dartmouth Hitchcock Medical Center, Lebanon, NH, USA
| | | | - Paul Santos
- Lakes Region General Healthcare, Laconia, NH, USA
| | - Katrina E Hansen
- New Hampshire Department of Health and Human Services, Concord, NH, USA
| |
Collapse
|
12
|
Varna D, Geromichalou E, Papachristou E, Papi R, Hatzidimitriou AG, Panteris E, Psomas G, Geromichalos GD, Aslanidis P, Choli-Papadopoulou T, Angaridis PA. Biocompatible silver(I) complexes with heterocyclic thioamide ligands for selective killing of cancer cells and high antimicrobial activity - A combined in vitro and in silico study. J Inorg Biochem 2021; 228:111695. [PMID: 35007963 DOI: 10.1016/j.jinorgbio.2021.111695] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/02/2021] [Accepted: 12/23/2021] [Indexed: 12/11/2022]
Abstract
A series of heteroleptic Ag(I) complexes bearing 4,6-dimethyl-2-pyrimidinethiol (dmp2SH), i.e., [AgCl(dmp2SH)(PPh3)2] (1), [Ag(dmp2SH)(PPh3)2]NO3 (2), [Ag(dmp2SΗ)(xantphos)]NO3 (3), [Ag(μ-dmp2S)(PPh3)]2 (4), [Ag(dmp2S)(xantphos)] (5), [Ag(μ-dmp2S)(DPEphos)]2 (6) (xantphos = 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene and DPEPhos = bis[(2-diphenylphosphino)phenyl]ether) were synthesized. The complexes display systematic variation of particular structural characteristics which were proved to have a significant impact on their in vitro cytotoxicity and antimicrobial properties. A moderate-to-high potential for bacteria growth inhibition was observed for all complexes, with 2, 3 and 5 being particularly effective against Gram-(+) bacteria (IC50 = 1.6-4.5 μM). The three complexes exhibit high in vitro cytotoxicity against HeLa and MCF-7 cancer cells (IC50 = 0.32-3.00 μΜ), suggesting the importance of coordination unsaturation and cationic charge for effective bioactivity. A very low cytotoxicity against HDFa normal cells was observed, revealing a high degree of selectivity (selectivity index ~10) and, hence, biocompatibility. Fluorescence microscopy using 2 showed effective targeting on the membrane of the HeLa cancer cells, subsequently inducing cell death. Binding of the complexes to serum albumin proteins is reasonably strong for potential uptake and subsequent release to target sites. A moderate in vitro antioxidant capacity for free radicals scavenging was observed and a low potential to destroy the double-strand structure of calf-thymus DNA by intercalation, suggesting likely implication of these properties in the bioactivity mechanisms of these complexes. Further insight into possible mechanisms of bioactivity was obtained by molecular modeling calculations, by exploring their ability to act as potential inhibitors of DNA-gyrase, human estrogen receptor alpha, human cyclin-dependent kinase 6, and human papillomavirus E6 oncoprotein.
Collapse
Affiliation(s)
- Despoina Varna
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Elena Geromichalou
- Laboratory of Pharmacology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Street, Athens 11527, Greece
| | - Eleni Papachristou
- Laboratory of Biochemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Rigini Papi
- Laboratory of Biochemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Antonios G Hatzidimitriou
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Emmanuel Panteris
- Laboratory of Botany, Department of Biology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - George Psomas
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - George D Geromichalos
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Paraskevas Aslanidis
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Theodora Choli-Papadopoulou
- Laboratory of Biochemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.
| | - Panagiotis A Angaridis
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.
| |
Collapse
|
13
|
Yamaguchi K, Taguchi S, Katsuki M, Sano Y, Hirano T, Yasunami M, Fukuoka M. [Evaluation of Accuracy and Availability of the Antimicrobial Resistance Testing by the Direct Disc Methods Using AmpC/ESBL Differential Discs in the Samples in Which Enterobacterales are Detected in Blood Culture]. Rinsho Biseibutshu Jinsoku Shindan Kenkyukai Shi 2021; 31:1-6. [PMID: 34986641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The emergence and dissemination of drug-resistant Gram-negative bacilli have been recognized as a serious health concern in worldwide. The isolation rates of Extended-Spectrum β-lactamases (ESBL) and AmpC β-lactamases (AmpC) producing gram negative rods are increasing in our hospital. In the present study, we evaluate the availability of the antimicrobial resistance testing by the direct disc methods using AmpC/ESBL differential discs. One hundred and ten strains of Enterobacterales were isolated during the observation period, of which 19 strains (17%) were ESBL-positive and 6 strains (5%) were AmpC-positive. The positive and negative coincidence rate between direct disc methods and standard disc methods were 100%. We conclude that the direct disc method is a useful and rapid detection method for ESBL and AmpC from blood culture samples.
Collapse
|
14
|
Nazarshodeh E, Marashi SA, Gharaghani S. Structural systems pharmacology: A framework for integrating metabolic network and structure-based virtual screening for drug discovery against bacteria. PLoS One 2021; 16:e0261267. [PMID: 34905555 PMCID: PMC8670682 DOI: 10.1371/journal.pone.0261267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 11/26/2021] [Indexed: 12/05/2022] Open
Abstract
Advances in genome-scale metabolic models (GEMs) and computational drug discovery have caused the identification of drug targets at the system-level and inhibitors to combat bacterial infection and drug resistance. Here we report a structural systems pharmacology framework that integrates the GEM and structure-based virtual screening (SBVS) method to identify drugs effective for Escherichia coli infection. The most complete genome-scale metabolic reconstruction integrated with protein structures (GEM-PRO) of E. coli, iML1515_GP, and FDA-approved drugs have been used. FBA was performed to predict drug targets in silico. The 195 essential genes were predicted in the rich medium. The subsystems in which a significant number of these genes are involved are cofactor, lipopolysaccharide (LPS) biosynthesis that are necessary for cell growth. Therefore, some proteins encoded by these genes are responsible for the biosynthesis and transport of LPS which is the first line of defense against threats. So, these proteins can be potential drug targets. The enzymes with experimental structure and cognate ligands were selected as final drug targets for performing the SBVS method. Finally, we have suggested those drugs that have good interaction with the selected proteins as drug repositioning cases. Also, the suggested molecules could be promising lead compounds. This framework may be helpful to fill the gap between genomics and drug discovery. Results show this framework suggests novel antibacterials that can be subjected to experimental testing soon and it can be suitable for other pathogens.
Collapse
Affiliation(s)
- Elmira Nazarshodeh
- Laboratory of Bioinformatics and Drug Design (LBD), Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Sayed-Amir Marashi
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
| | - Sajjad Gharaghani
- Laboratory of Bioinformatics and Drug Design (LBD), Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| |
Collapse
|
15
|
Cao Y, Dhahad HA, El-Shorbagy MA, Alijani HQ, Zakeri M, Heydari A, Bahonar E, Slouf M, Khatami M, Naderifar M, Iravani S, Khatami S, Dehkordi FF. Green synthesis of bimetallic ZnO-CuO nanoparticles and their cytotoxicity properties. Sci Rep 2021; 11:23479. [PMID: 34873281 PMCID: PMC8648779 DOI: 10.1038/s41598-021-02937-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 11/24/2021] [Indexed: 01/14/2023] Open
Abstract
In this study, a simple and green strategy was reported to prepare bimetallic nanoparticles (NPs) by the combination of zinc oxide (ZnO) and copper oxide (CuO) using Sambucus nigra L. extract. The physicochemical properties of these NPs such as crystal structure, size, and morphology were studied by X-ray diffraction (XRD), field emission gun scanning electron microscopy (FEG-SEM), and transmission electron microscopy (TEM). The results suggested that these NPs contained polygonal ZnO NPs with hexagonal phase and spherical CuO NPs with monoclinic phase. The anticancer activity of the prepared bimetallic NPs was evaluated against lung and human melanoma cell lines based on MTT assay. As a result, the bimetallic ZnO/CuO NPs exhibited high toxicity on melanoma cancer cells while their toxicity on lung cancer cells was low.
Collapse
Affiliation(s)
- Yan Cao
- School of Mechatronic Engineering, Xi'an Technological University, Xi'an, 710021, China
| | - Hayder A Dhahad
- Mechanical Engineering Department, University of Technology, Baghdad, Iraq
| | - M A El-Shorbagy
- Department of Mathematics, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia
- Department of Basic Engineering Science, Faculty of Engineering, Menoufia University, Shebin El-Kom, 32511, Egypt
| | - Hajar Q Alijani
- Department of Biotechnology, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Mana Zakeri
- Department of Biology, Islamic Azad University, Tehran Medical Branch, Tehran, Iran
| | - Abolfazl Heydari
- Polymer Institute of the Slovak Academy of Sciences, Dúbravská Cesta 9, 845 41, Bratislava, Slovakia
| | - Ehsan Bahonar
- Faculty of Chemical and Petroleum Engineering, Sahand University of Technology, Tabriz, Iran
| | - Miroslav Slouf
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovskeho nam. 2, 162 06, Prague 6, Czech Republic
| | - Mehrdad Khatami
- Noncommunicable Diseases Research Center, Bam University of Medical Sciences, Bam, Iran.
| | - Mahin Naderifar
- Faculty of Nursing & Midwifery, Zabol University of Medical Sciences, Zabol, Iran
| | - Siavash Iravani
- Faculty of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sanaz Khatami
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | |
Collapse
|
16
|
Caso Coelho V, Pereira Neves SD, Cintra Giudice M, Benard G, Lopes MH, Sato PK. Evaluation of antimicrobial susceptibility testing of Nocardia spp. isolates by broth microdilution with resazurin and spectrophotometry. BMC Microbiol 2021; 21:331. [PMID: 34865615 PMCID: PMC8647337 DOI: 10.1186/s12866-021-02394-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Accepted: 11/19/2021] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Nocardia species are ubiquitous in natural environments and can cause nocardiosis. In the present study, the use of Resazurin salt and Spectrophotometry were proposed as alternative methods to reduce subjectivity in the interpretation of susceptibility results to antimicrobials by the broth microdilution method for Nocardia spp. RESULTS The susceptibility of Nocardia spp. isolates to Amikacin, Ciprofloxacin, Minocycline and Trimethoprim-Sulfamethoxazole was evaluated by Minimum Inhibitory Concentration (MIC) determinations by the broth microdilution method. To verify cellular growth, the colour-changing dye Resazurin was applied, the Optical Densities were measured on a spectrophotometer, and both were compared to Clinical and Laboratory Standards Institute (CLSI) Gold Standard method (visual MIC determination). Percentages of essential and categorical agreements and interpretative categorical errors were calculated within each method (intra-reading) and between them (inter-reading). The Gold Standard visual reading demonstrated 100% of essential and categorical intra-reading agreements for Amikacin, and there was no error when compared with the alternative methods. For Ciprofloxacin, the comparison between the Gold Standard and the Spectrophotometric reading showed 91.5% of essential agreement. In the categorical intra-reading analysis for Minocycline, there were 88.1 and 91.7% in the Gold Standard and in the Spectrophotometric readings, respectively, and 86.4% of concordance between them. High rates of categorical agreement were also observed on the Trimethoprim-Sulfamethoxazole analyses, with 93.7% for the Gold Standard, 84.9% for the Resazurin readings, and 80.5% between them. CONCLUSIONS The alternative methods with Resazurin and Spectrophotometric readings showed high agreement rates with the Gold Standard.
Collapse
Affiliation(s)
- Vivian Caso Coelho
- Laboratory of Medical Investigation in Immunology (LIM48), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Av. Dr. Eneas Carvalho de Aguiar 470, IMT 2, terreo, Sao Paulo, SP, 05403-000, Brazil
- Department of Infectious Diseases, FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
| | | | - Mauro Cintra Giudice
- Laboratory of Medical Investigation in Micology (LIM53), HCFMUSP, Sao Paulo, Brazil
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Present Address: Faculdades Oswaldo Cruz, Sao Paulo, Brazil
| | - Gil Benard
- Laboratory of Medical Investigation in Micology (LIM53), HCFMUSP, Sao Paulo, Brazil
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Marta Heloisa Lopes
- Laboratory of Medical Investigation in Immunology (LIM48), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Av. Dr. Eneas Carvalho de Aguiar 470, IMT 2, terreo, Sao Paulo, SP, 05403-000, Brazil
- Department of Infectious Diseases, FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Paula Keiko Sato
- Laboratory of Medical Investigation in Immunology (LIM48), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Av. Dr. Eneas Carvalho de Aguiar 470, IMT 2, terreo, Sao Paulo, SP, 05403-000, Brazil.
| |
Collapse
|
17
|
Al-Dayan N. Biosynthesis of Copper Oxide Nanomaterials Using the Seeds of Date Fruits ( Phoenix dactylifera L.) and Antibacterial Activity Evaluation. Pak J Biol Sci 2021; 24:1034-1039. [PMID: 34842372 DOI: 10.3923/pjbs.2021.1034.1039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
<b>Background and Objective:</b> Green chemistry approach is a simple, eco-friendly, less toxic, cost-effective and biological method. <i>Phoenix dactylifera </i>seed extract has been used as a reducing and capping agent for the green synthesis of copper oxide nanomaterials. This approach had forewarned the interest in researching natural waste products to increase the usage of alternative therapies for infectious diseases. The present investigation determined the production of biogenic copper oxide nanomaterials using the seeds of date fruits (<i>Phoenix dactylifera </i>L.) by green approaches and an eco-friendly process. <b>Materials and Methods:</b> Extract of seeds of date fruits acted as potential and effective bio capping and reductant agents for bio-synthesis of copper oxide nanoparticles. The properties of biogenic copper oxide nanomaterials were assessed and characterized by the FT-IR, SEM, EDX, XRD and TGA analysis. <b>Results:</b> All the characterization results were confirming that produced copper oxide nanomaterials are spherical in shape with a size of 30±6 nm. Synthesized copper oxide nanomaterials are highly pure forms and resistant to high temperatures. Further, the antibacterial activity of green synthesized copper oxide nanomaterials against human bacterial pathogens was evaluated by the agar well diffusion method. The maximum zone of inhibition was obtained in <i>E. coli</i> as compared to the positive control (tetracycline). <b>Conclusion:</b> The results of the antibacterial assay indicate that biogenic copper oxide nanomaterials should be considered as an antibacterial agent for the treatment and prevention of infectious diseases.
Collapse
|
18
|
Na SH, Jeon H, Oh MH, Kim YJ, Chu M, Lee IY, Lee JC. Therapeutic Effects of Inhibitor of ompA Expression against Carbapenem-Resistant Acinetobacter baumannii Strains. Int J Mol Sci 2021; 22:12257. [PMID: 34830146 PMCID: PMC8623844 DOI: 10.3390/ijms222212257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/06/2021] [Accepted: 11/10/2021] [Indexed: 12/02/2022] Open
Abstract
The widespread of carbapenem-resistant Acinetobacter baumannii (CRAB) is of great concern in clinical settings worldwide. It is urgent to develop new therapeutic agents against this pathogen. This study aimed to evaluate the therapeutic potentials of compound 62520, which has been previously identified as an inhibitor of the ompA promoter activity of A. baumannii, against CRAB isolates, both in vitro and in vivo. Compound 62520 was found to inhibit the ompA expression and biofilm formation in A. baumannii ATCC 17978 at sub-inhibitory concentrations in a dose-dependent manner. These inhibitory properties were also observed in clinical CRAB isolates belonging to sequence type (ST) 191. Additionally, compound 62520 exhibited a bacteriostatic activity against clinical clonal complex (CC) 208 CRAB isolates, including ST191, and ESKAPE pathogens. This bacteriostatic activity was not different between STs of CRAB isolates. Bacterial clearance was observed in mice infected with bioimaging A. baumannii strain 24 h after treatment with compound 62520. Compound 62520 was shown to significantly increase the survival rates of both immunocompetent and neutropenic mice infected with A. baumannii ATCC 17978. This compound also increased the survival rates of mice infected with clinical CRAB isolate. These results suggest that compound 62520 is a promising scaffold to develop a novel therapeutic agent against CRAB infections.
Collapse
Affiliation(s)
- Seok-Hyeon Na
- Division of Antimicrobial Resistance Research, Center for Infectious Diseases Research, National Institute of Infectious Diseases, National Institute of Health, Korea Disease Control and Prevention Agency, Cheongju 28159, Korea;
| | - Hyejin Jeon
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (H.J.); (Y.-J.K.)
| | - Man-Hwan Oh
- Department of Microbiology, College of Science and Technology, Dankook University, Cheonan 16890, Korea;
| | - Yoo-Jeong Kim
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (H.J.); (Y.-J.K.)
| | - Mingi Chu
- Research Center for Eco-Friendly New Materials, Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Korea; (M.C.); (I.-Y.L.)
| | - Ill-Young Lee
- Research Center for Eco-Friendly New Materials, Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Korea; (M.C.); (I.-Y.L.)
| | - Je-Chul Lee
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (H.J.); (Y.-J.K.)
| |
Collapse
|
19
|
Gad El-Rab SMF, Ashour AA, Basha S, Alyamani AA, Felemban NH, Enan ET. Well-Orientation Strategy Biosynthesis of Cefuroxime-Silver Nanoantibiotic for Reinforced Biodentine™ and Its Dental Application against Streptococcus mutans. Molecules 2021; 26:6832. [PMID: 34833924 PMCID: PMC8622780 DOI: 10.3390/molecules26226832] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 11/25/2022] Open
Abstract
Dental caries results from the bacterial pathogen Streptococcus mutans (S. mutans) and is the maximum critical reason for caries formation. Consequently, the present study aims to evaluate the antibacterial activity of a newly synthesized nanoantibiotic-Biodentine formulation. The silver nanoparticles (ROE-AgNPs) were biosynthesized from the usage of Rosmarinus officinalis L. extract (ROE) and conjugated with cefuroxime to form Cefuroxime-ROE-AgNPs. Using Biodentine™ (BIOD), five groups of dental materials were prepared, in which Group A included conventional BIOD, Group B included BIOD with ROE-AgNPs, Groups C and D included BIOD with Cefuroxime-ROE-AgNPs at concentrations of 0.5% and 1.5% cefuroxime, respectively, and Group E included BIOD with 1.5% cefuroxime. The synthesized ROE-AgNPs or Cefuroxime-ROE-AgNPs were characterized for conjugating efficiency, morphology, particle size, and in vitro release. Minimum inhibitory concentration (MIC) of the cefuroxime, ROE-AgNPs, and Cefuroxime-ROE-AgNPs were additionally evaluated against cefuroxime resistant S. mutans, which furthered antibacterial efficacy of the five groups of dental materials. The UV-Visible spectrum showed the ROE-AgNPs or Cefuroxime-ROE-AgNPs peaks and their formation displayed through transmission electron microscopy (TEM), X-ray diffraction (XRD) pattern, and Fourier transforms infrared (FTIR) analysis. The end result of Cefuroxime-ROE-AgNPs showed conjugating efficiency up to 79%. Cefuroxime-ROE-AgNPs displayed the highest antibacterial efficacy against S. mutans as compared to cefuroxime or ROE-AgNPs alone. Moreover, the MIC of ROE-AgNPs and Cefuroxime-ROE-AgNPs was detected against S. mutans to be 25 and 8.5 μg/mL, respectively. Consequently, Cefuroxime-ROE-AgNPs displayed that a decrease in the MIC reached to more than three-fold less than MIC of ROE-AgNPs on the tested strain. Moreover, Cefuroxime-ROE-AgNPs/BIOD was employed as a novel dental material that showed maximum antimicrobial activity. Groups C and D of novel materials showed inhibitory zones of 19 and 26 mm, respectively, against S. mutans and showed high antimicrobial rates of 85.78% and 91.17%, respectively. These data reinforce the utility of conjugating cefuroxime with ROE-AgNPs to retrieve its efficiency against resistant S. mutant. Moreover, the nanoantibiotic delivered an advantageous antibacterial effect to BIOD, and this may open the door for future conjugation therapy of dental materials against bacteria that cause dental caries.
Collapse
Affiliation(s)
- Sanaa M. F. Gad El-Rab
- Department of Biotechnology, Faculty of Science, Taif University, Taif 21974, Saudi Arabia;
- Department of Botany and Microbiology, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Amal A. Ashour
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, Oral Pathology Division, Faculty of Dentistry, Taif University, Taif 26571, Saudi Arabia;
| | - Sakeenabi Basha
- Department of Preventive and Community Dentistry, Faculty of Dentistry, Taif University, Taif 26571, Saudi Arabia;
| | - Amal Ahmed Alyamani
- Department of Biotechnology, Faculty of Science, Taif University, Taif 21974, Saudi Arabia;
| | - Nayef H. Felemban
- Preventive Dentistry Department, Faculty of Dentistry, Taif University, Taif 26571, Saudi Arabia;
| | - Enas Tawfik Enan
- Dental Biomaterials, Faculty of Dentistry, Taif University, Taif 26571, Saudi Arabia;
- Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura 35511, Egypt
| |
Collapse
|
20
|
Batool F, Iqbal MS, Khan SUD, Khan J, Ahmed B, Qadir MI. Biologically synthesized iron nanoparticles (FeNPs) from Phoenix dactylifera have anti-bacterial activities. Sci Rep 2021; 11:22132. [PMID: 34764312 PMCID: PMC8586337 DOI: 10.1038/s41598-021-01374-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 09/30/2021] [Indexed: 11/17/2022] Open
Abstract
Nanotechnology is a vast field of science with the most vibrant and conspicuous applications. The green synthesis approach is cost-effective, eco-friendly, and produces the most stable metal-based nanoparticles without the use of toxic chemicals. This study presents the green synthesis of iron nanoparticles (FeNPs). For biosynthesis of FeNPs, Phoenix dactylifera extract was used as a reducing agent and iron sulfate heptahydrate (FeSO4·7H2O) was used as a substrate. FeNPs were characterized by different techniques including UV-Visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), and nano zeta-sizer analysis. The antimicrobial activity of FeNPs synthesized by using an aqueous extract of Phoenix dactylifera was evaluated against Escherichia coli, Bacillus subtilis, Micrococcus leutus, and Klebsiella pneumoniae. A notable color change from yellow to black confirmed the synthesis of FeNPs. The sharp peak at 450 nm UV-Visible spectroscopy confirmed the synthesis of FeNPs. FTIR showed the presence of O-H and C=C stretching due to the presence of phenol and alkene functional groups. The average size of FeNPs was 6092 d.nm. The results of antimicrobial activity showed that FeNPs exhibit different potential against different bacterial strains with a maximum 25 ± 0.360 zone of inhibition against Escherichia coli. Thus, green synthesized FeNPs could be used as potential antimicrobial agents.
Collapse
Affiliation(s)
- Faryal Batool
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan, Pakistan
| | - Muhammad Shahid Iqbal
- Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia
| | - Salah-Ud-Din Khan
- Department of Biochemistry, College of Medicine, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 11432, Saudi Arabia
| | - Javed Khan
- Department of Public Health, College of Health Sciences, Saudi Electronic University, Riyadh, 11673, Saudi Arabia
| | - Bilal Ahmed
- Department of Clinical Pharmacology, School of Pharmacy, Nanjing Medical University, Jiangsu Province, Nanjing, People's Republic of China
| | - Muhammad Imran Qadir
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan, Pakistan.
| |
Collapse
|
21
|
Yamashige D, Hosaka T, Suzuki F, Fujiyama S, Kawamura Y, Sezaki H, Akuta N, Kobayashi M, Suzuki Y, Saitoh S, Arase Y, Ikeda K, Kobayashi M, Kumada H. Effectiveness of tenofovir alafenamide for chronic hepatitis B patients with a poor response to the previously used nucleos(t)ide analogs. J Gastroenterol 2021; 56:1008-1021. [PMID: 34596753 DOI: 10.1007/s00535-021-01826-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 09/10/2021] [Indexed: 02/04/2023]
Abstract
BACKGROUND Few studies have demonstrated the potency of tenofovir alafenamide (TAF) in patients with poor response to other nucleos(t)ide analogs (NAs). METHODS We conducted a retrospective study comprising consecutive 40 patients exhibiting a poor response to other NAs, who subsequently received TAF-containing regimens. The primary outcome was the prevalence of virological response (VR) at each time and maintained virological response (MVR) under TAF-containing regimens until week 96. RESULTS In the entire cohort, the prevalence of MVR was 71.1% (27/38). Further, poor tenofovir disoproxil fumarate (TDF) response was significantly associated with a lower prevalence of MVR (p = 0.014). In TDF-naïve patients, the prevalence of MVR was 92.3% (12/13) and 62.5% (5/8) in patients with lamivudine resistance (LAM-r) and entecavir resistance (ETV-r), respectively. Further, viral load and HBeAg status at baseline were associated with a lower prevalence of MVR (p = 0.013). Among the seven patients with prior TDF exposure, 2 patients achieved MVR. Among them, one patient with development of viral breakthrough during TDF/LAM achieved MVR after switching to TAF/ETV. In contrast, one of the five patients with non-MVR had three substitutions (rtS106C, rtD134N/S, and rtL269I) of quadruple mutations in addition to ETV-r. Other patients with rtA181T + rtN236T also could not achieve MVR. CONCLUSION TAF exhibited high antiviral potency in patients with LAM-r and ETV-r. However, TAF potency was associated with previous TDF response, viral load, and HBeAg status at baseline. Additionally, a quadruple mutation may impact tenofovir resistance; however, further studies are needed to verify this.
Collapse
Affiliation(s)
- Daiki Yamashige
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Tetsuya Hosaka
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan.
| | - Fumitaka Suzuki
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Shunichiro Fujiyama
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Yusuke Kawamura
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Hitomi Sezaki
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Norio Akuta
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Masahiro Kobayashi
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Yoshiyuki Suzuki
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Satoshi Saitoh
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Yasuji Arase
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Kenji Ikeda
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Mariko Kobayashi
- Research Institute for Hepatology, Toranomon Hospital, Kawasaki, Japan
| | - Hiromitsu Kumada
- Department of Hepatology, Toranomon Hospital, 2-2-2, Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| |
Collapse
|
22
|
Rosen GH, Kanake S, Golzy M, Malm-Buatsi E, Murray KS. Antimicrobial Selection for Transurethral Procedures Across the United States: A State-by-State Antibiogram Evaluation. Urology 2021; 159:107-113. [PMID: 34718003 DOI: 10.1016/j.urology.2021.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/08/2021] [Accepted: 10/11/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To evaluate optimal regimens for perioperative antimicrobial prophylaxis in transurethral procedures by examining antimicrobial susceptibility patterns in the United States. MATERIALS AND METHODS Through several methods, we attempted to attain an antibiogram for each state. We focused on microbes known to cause infections after transurethral surgeries and antibiotics referred to in current or prior recommendations and compared susceptibility rates across states using Kruskal Walis tests and the Dwass, Steel, Critchlow-Fligner tests. We also examined susceptibility to (non-ceftazidime) third generation cephalosporins. RESULTS Data is included from 40 states. For each microbe studied, there was significant variability in sensitivity to antibiotics studied. Current first line recommendations for antimicrobial prophylaxis include first generation cephalosporins with 82%, 80%, and 87% mean coverage for E coli, Proteus, and Klebsiella respectively and trimethoprim-sulfamethoxazole with 74%, 80%, and 93% coverage, respectively. Susceptibility to aminoglycosides is 91%, 92%, and 96%, respectively and to third generation cephalosporin, it is 92%, 99%, and 94%. CONCLUSION Current first line recommended antimicrobials for prophylaxis in transurethral procedures provide overall poor predicted coverage based on our database of antibiograms. Alternatives exist that have higher predicted susceptibility, though clinical significance of this and risk of resultant antimicrobial resistance is unknown. Urologists should consider local patterns when selecting antimicrobial prophylaxis for their patients.
Collapse
Affiliation(s)
- Geoffrey H Rosen
- Department of Surgery, Division of Urology, University of Missouri, Columbia, MO
| | - Shubham Kanake
- School of Medicine, University of Missouri, Columbia, MO
| | - Mojgan Golzy
- Department of Family and Community Medicine, University of Missouri, Columbia, MO
| | | | - Katie S Murray
- Department of Surgery, Division of Urology, University of Missouri, Columbia, MO.
| |
Collapse
|
23
|
Woroszyło M, Ciecholewska-Juśko D, Junka A, Wardach M, Chodaczek G, Dudek B, Fijałkowski K. The Effect of Rotating Magnetic Field on Susceptibility Profile of Methicillin-Resistant Staphylococcus aureus Strains Exposed to Activity of Different Groups of Antibiotics. Int J Mol Sci 2021; 22:ijms222111551. [PMID: 34768983 PMCID: PMC8583794 DOI: 10.3390/ijms222111551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 12/05/2022] Open
Abstract
Methicillin-resistant strains of Staphylococcus aureus (MRSA) have become a global issue for healthcare systems due to their resistance to most β-lactam antibiotics, frequently accompanied by resistance to other classes of antibiotics. In this work, we analyzed the impact of combined use of rotating magnetic field (RMF) with various classes of antibiotics (β-lactams, glycopeptides, macrolides, lincosamides, aminoglycosides, tetracyclines, and fluoroquinolones) against nine S. aureus strains (eight methicillin-resistant and one methicillin-sensitive). The results indicated that the application of RMF combined with antibiotics interfering with cell walls (particularly with the β-lactam antibiotics) translate into favorable changes in staphylococcal growth inhibition zones or in minimal inhibitory concentration values compared to the control settings, which were unexposed to RMF. As an example, the MIC value of cefoxitin was reduced in all MRSA strains by up to 42 times. Apart from the β-lactams, the reduced MIC values were also found for erythromycin, clindamycin, and tetracycline (three strains), ciprofloxacin (one strain), gentamicin (six strains), and teicoplanin (seven strains). The results obtained with the use of in vitro biofilm model confirm that the disturbances caused by RMF in the bacterial cell walls increase the effectiveness of the antibiotics towards MRSA. Because the clinical demand for new therapeutic options effective against MRSA is undisputable, the outcomes and conclusions drawn from the present study may be considered an important road into the application of magnetic fields to fight infections caused by methicillin-resistant staphylococci.
Collapse
Affiliation(s)
- Marta Woroszyło
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland; (M.W.); (D.C.-J.)
| | - Daria Ciecholewska-Juśko
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland; (M.W.); (D.C.-J.)
| | - Adam Junka
- Department of Pharmaceutical Microbiology and Parasitology, Faculty of Pharmacy, Medical University of Wroclaw, Borowska 211a, 50-534 Wrocław, Poland
- Laboratory of Microbiology, Łukasiewicz Research Network—PORT Polish Center for Technology Development, 54-066 Wrocław, Poland
- Correspondence: (A.J.); (K.F.); Tel.: +48-88-922-9341 (A.J.); +48-91-449-6714 (K.F.)
| | - Marcin Wardach
- Faculty of Electrical Engineering, West Pomeranian University of Technology in Szczecin, Sikorskiego 37, 70-313 Szczecin, Poland;
| | - Grzegorz Chodaczek
- Laboratory of Confocal Microscopy, Łukasiewicz Research Network—PORT Polish Center for Technology Development, Stabłowicka 147, 54-066 Wrocław, Poland;
| | - Bartłomiej Dudek
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wrocław, Stanisława Przybyszewskiego 63, 51-148 Wrocław, Poland;
| | - Karol Fijałkowski
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland; (M.W.); (D.C.-J.)
- Correspondence: (A.J.); (K.F.); Tel.: +48-88-922-9341 (A.J.); +48-91-449-6714 (K.F.)
| |
Collapse
|
24
|
Vellingiri MM, Ashwin JKM, Soundari AJPG, Sathiskumar S, Priyadharshini U, Paramasivam D, Liu WC, Balasubramanian B. Mycofabrication of AgONPs derived from Aspergillus terreus FC36AY1 and its potent antimicrobial, antioxidant, and anti-angiogenesis activities. Mol Biol Rep 2021; 48:7933-7946. [PMID: 34655404 DOI: 10.1007/s11033-021-06824-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 10/08/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND There is an emergency need for the natural therapeutic agents to treat arious life threatening diseases such as cardio- vascular disease, Rheumatoid arthritis and cancer. Among these diseases, cancer is found to be the second life threatening disease; in this view the present study focused to synthesize the silver oxide nanoparticles (AgONPs) from endophytic fungus. METHODS The endophytic fungus was isolated from a medicinal tree Aegle marmelos (Vilva tree) and the potential strain was screened through antagonistic activity. The endophytic fungus was identified through microscopic (Lactophenol cotton blue staining and spore morphology in culture media) and Internal Transcribed Spacer (ITS) 1, ITS 4 and 18S rRNA amplification. The endophyte was cultured for the synthesis of AgONPs and the synthesized NPs were characterized through UV- Vis, FT- IR, EDX, XRD and SEM. The synthesized AgONPs were determined for antimicrobial, antioxidant and anti- angiogenic activity. RESULTS About 35 pigmented endophytic fungi were isolated, screened for antagonistic activity against 12 pathogens and antioxidant activity through DPPH radical scavenging assay; among the isolates, FC36AY1 explored the highest activity and the strain FC36AY1 was identified as Aspergillus terreus. The AgONPs were synthesized from the strain FC36AY1 and characterized for its confirmation, functional groups, nanostructures with unit cell dimensions, size and shape, presence of elements through UV-Vis spectrophotometry, FT-IR, XRD, SEM with EDX analysis. The myco-generated AgONPs manifested their antimicrobial and antioxidant properties with maximum activity at minimum concentration. Moreover, the inhibition of angiogenesis by the AgONPs in Hen's Egg Test on the Chorio-Allantoic Membrane analysis were tested on the eggs of Chittagong breed evinced at significant bioactivity least concentration at 0.1 µg/mL. CONCLUSIONS Thus, the results of this study revealed that the fungal mediated AgONPs can be exploited as potential in biomedical applications.
Collapse
Affiliation(s)
- Manon Mani Vellingiri
- Department of Biotechnology, Rathnavel Subramaniam College of Arts and Science, Coimbatore, Tamil Nadu, 641 402, India
- Department of Microbial Biotechnology, Bharathiar University, Coimbatore, Tamil Nadu, 641 046, India
| | | | - Arockiam Jeyasundar Parimala Gnana Soundari
- Department of Biotechnology, Rathnavel Subramaniam College of Arts and Science, Coimbatore, Tamil Nadu, 641 402, India
- Department of Advanced Studies, The Gandhigram Rural Institute (Deemed to be University), Dindigul, India
| | - Swamiappan Sathiskumar
- Department of Microbial Biotechnology, Bharathiar University, Coimbatore, Tamil Nadu, 641 046, India
| | | | - Deepak Paramasivam
- Department of Biotechnology, Dr. N.G.P. Arts and Science College (Autonomous and Affiliated to Bharathiar University), Coimbatore, Tamil Nadu, 641048, India
| | - Wen-Chao Liu
- Department of Animal Science, College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, People's Republic of China.
| | | |
Collapse
|
25
|
Zhao T, Ma C, Zhu G. Chemical Composition and Biological Activities of Essential Oils from the Leaves, Stems, and Roots of Kadsura coccinea. Molecules 2021; 26:6259. [PMID: 34684838 PMCID: PMC8537082 DOI: 10.3390/molecules26206259] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/06/2021] [Accepted: 10/13/2021] [Indexed: 12/02/2022] Open
Abstract
The chemical composition and biological activities of the essential oils from the leaves, stems, and roots of Kadsura coccinea (K. coccinea) were investigated. The essential oils were extracted by hydro distillation and analyzed by gas chromatography mass spectrometry (GC-MS) and gas chromatography with flame ionization detector (GC-FID). Antioxidant activities of the essential oils were examined with DPPH radical scavenging assay, ABTS cation radical scavenging assay, and ferric reducing antioxidant power assay. Antimicrobial activities were evaluated by determining minimum inhibitory concentrations (MIC) and minimum microbiocidal concentrations (MMC). Acetylcholinesterase and butyrylcholinesterase inhibitory activity of the essential oils were also tested. A total of 46, 44, and 47 components were identified in the leaf, stem, and root oils, representing 95.66%, 97.35%, and 92.72% of total composition, respectively. The major compounds of three essential oils were α-pinene (16.60-42.02%), β-pinene (10.03-18.82%), camphene (1.56-10.95%), borneol (0.50-7.71%), δ-cadinene (1.52-7.06%), and β-elemene (1.86-4.45%). The essential oils were found to have weak antioxidant activities and cholinesterase inhibition activities. The essential oils showed more inhibitory effects against Staphylococcus aureus (S. aureus) than those of other strains. The highest antimicrobial activity was observed in the root oil against S. aureus, with MIC of 0.78 mg/mL. Therefore, K. coccinea essential oils might be considered as a natural antibacterial agent against S. aureus with potential application in food and pharmaceutical industries.
Collapse
Affiliation(s)
- Tianming Zhao
- College of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang 550003, China; (C.M.); (G.Z.)
| | | | | |
Collapse
|
26
|
Omar HS, Abd El-Rahman SN, AlGhannam SM, Reyad NEHA, Sedeek MS. Antifungal Evaluation and Molecular Docking Studies of Olea europaea Leaf Extract, Thymus vulgaris and Boswellia carteri Essential Oil as Prospective Fungal Inhibitor Candidates. Molecules 2021; 26:molecules26206118. [PMID: 34684700 PMCID: PMC8539494 DOI: 10.3390/molecules26206118] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/28/2021] [Accepted: 09/30/2021] [Indexed: 12/05/2022] Open
Abstract
Background: The present study investigated the antifungal activity and mode of action of four Olea europaea leaf extracts, Thymus vulgaris essential oil (EO), and Boswellia carteri EO against Fusarium oxysporum. Methods:Fusarium oxysporum lactucae was detected with the internal transcribed spacer (ITS) region. The chemical compositions of chloroform and dichloromethane extracts of O. europaea leaves and T. vulgaris EO were analyzed using GC-MS analysis. In addition, a molecular docking analysis was used to identify the expected ligands of these extracts against eleven F. oxysporum proteins. Results: The nucleotide sequence of the F. oxysporum lactucae isolate was deposited in GenBank with Accession No. MT249304.1. The T. vulgaris EO, chloroform, dichloromethane and ethanol efficiently inhibited the growth at concentrations of 75.5 and 37.75 mg/mL, whereas ethyl acetate, and B. carteri EO did not exhibit antifungal activity. The GC-MS analysis revealed that the major and most vital compounds of the T. vulgaris EO, chloroform, and dichloromethane were thymol, carvacrol, tetratriacontane, and palmitic acid. Moreover, molecular modeling revealed the activity of these compounds against F. oxysporum. Conclusions: Chloroform, dichloromethane and ethanol, olive leaf extract, and T. vulgaris EO showed a strong effect against F. oxysporum. Consequently, this represents an appropriate natural source of biological compounds for use in healthcare. In addition, homology modeling and docking analysis are the best analyses for clarifying the mechanisms of antifungal activity.
Collapse
Affiliation(s)
- Hanaa S. Omar
- Department of Genetics, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
- GMO Laboratory, Faculty of Agriculture, Cairo University, Research Park, CURP, Giza 12613, Egypt
- Correspondence: (H.S.O.); (S.N.A.E.-R.)
| | - Soheir N. Abd El-Rahman
- Crops Technology Research Department, Food Technology Research Institute, Agricultural Research Center, Giza 12619, Egypt
- Correspondence: (H.S.O.); (S.N.A.E.-R.)
| | - Sheikha M. AlGhannam
- Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia;
| | - Nour El-Houda A. Reyad
- Plant Pathology Department, Faculty of Agriculture, Cairo University, Giza 12613, Egypt;
| | - Mohamed S. Sedeek
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Giza 11562, Egypt;
| |
Collapse
|
27
|
He WP, Gu FF, Zhang J, Li XX, Xiao SZ, Zeng Q, Ni YX, Han LZ. Molecular characteristics and risk factor analysis of Staphylococcus aureus colonization put insight into CC1 colonization in three nursing homes in Shanghai. PLoS One 2021; 16:e0253858. [PMID: 34618818 PMCID: PMC8496869 DOI: 10.1371/journal.pone.0253858] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 06/14/2021] [Indexed: 11/19/2022] Open
Abstract
Research indicates that Staphylococcus aureus colonization in the elderly with predisposing risks is associated with subsequent infection. However, the molecular epidemiology and risk factors for S. aureus colonization among residents and staff in nursing homes (NHs) in China remain unclear. A multicenter study was conducted in three NHs in Shanghai between September 2019 and October 2019. We explored the prevalence, molecular epidemiology, and risk factors for S. aureus colonization. All S. aureus isolates were characterized based on antimicrobial resistance, virulence genes, multilocus sequence typing (MLST), staphylococcus protein A (spa) typing, and staphylococcal cassette chromosome mec (SCCmec) typing. NH records were examined for potential risk factors for S. aureus colonization. S. aureus and methicillin-resistant S. aureus (MRSA) isolates were detected in 109 (100 residents and 9 staff, 19.8%, 109/551) and 28 (24 residents and 4 staff, 5.1%, 28/551) subjects among 496 residents and 55 staff screened, respectively. Compared to methicillin-susceptible S. aureus isolates, all 30 MRSA isolates had higher resistance rates to most antibiotics except minocycline, rifampicin, linezolid, vancomycin, and teicoplanin. Sequence type (ST) 1 (21.3%) was the most common sequence type, and t127 (20.5%) was the most common spa type among 122 S. aureus isolates. SCCmec type I (70%) was the dominant clone among all MRSA isolates. CC1 (26/122, 21.3%) was the predominant complex clone (CC), followed by CC398 (25/122, 20.5%), CC5 (20/122, 16.4%) and CC188 (18/122, 14.8%). Female sex (OR, 1.70; 95% CI, 1.04-2.79; P = 0.036) and invasive devices (OR, 2.19; 95% CI, 1.26-3.81; P = 0.006) were independently associated with S. aureus colonization.
Collapse
Affiliation(s)
- Wei-Ping He
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fei-Fei Gu
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ji Zhang
- Department of Clinical Laboratory, Shanghai People’s Hospital of Putuo District, Shanghai, China
| | - Xin-Xin Li
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shu-Zhen Xiao
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qian Zeng
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu-Xing Ni
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Li-Zhong Han
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Clinical Microbiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| |
Collapse
|
28
|
Dadashpour R, Moghaddam MJM, Salehi Z. Prevalence of non-extended spectrum β-lactamases SHV-1 and TEM-1 or -2 types in multidrug-resistant Enterobacteriaceae in northern Iran. Biol Futur 2021; 71:419-426. [PMID: 34554461 DOI: 10.1007/s42977-020-00044-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 09/02/2020] [Indexed: 11/24/2022]
Abstract
The present study aimed to evaluate TEM-1 or -2 and SHV-1 β-lactamases frequency in multidrug-resistant (MDR) Enterobacteriaceae isolated from patients' urine in northern Iran. The resistance pattern to 20 antibiotics and ESBL production in 200 MDR Enterobacteriaceae was detected using the disk diffusion test and double-disk synergy test (DDST), respectively. Multiplex PCR was applied to detect blaTEM-1 or -2 and blaSHV genes in isolates. DDST findings were inconsistent with multiplex PCR results. The distribution of each of blaTEM-1 or -2 and blaSHV genes, either alone or in combination, in the ESBL-producing isolates was higher than the non-ESBL-producing isolates. There was a significant effect of the presence of blaTEM-1 or -2 gene on resistance to cephalotin at the p < 0.01 level and cefepime, tetracycline, and streptomycin at the P < 0.05 level, and the presence of blaSHV-1 gene on resistance to fosfomycin at the P < 0.05 level as well as the presence both blaTEM-1 or -2 and blaSHV-1 genes on resistance to cephalotin and fosfomycin at the P < 0.01 level. In all isolates, ESBL production, except for cephalotin resistance, did not improve resistance to other antibiotics used and even non-ESBL-producing isolates showed higher resistance to antibiotics compared to ESBL-producing isolates. It seems that mechanisms other than production of ESBL to be involved as part of the resistance mechanisms of the studied isolates against the used antibiotics. For epidemiological studies, both phenotypic and molecular tests must be included to identify the blaTEM-1 or -2 and blaSHV-1 genotypes to ensure infection prevention and control.
Collapse
Affiliation(s)
| | | | - Zivar Salehi
- Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran
| |
Collapse
|
29
|
Cheung AL, Cho J, Bayer AS, Yeaman MR, Xiong YQ, Donegan NP, Mikheyeva IV, Lee GY, Yang SJ. Role of the Staphylococcus aureus Extracellular Loop of GraS in Resistance to Distinct Human Defense Peptides in PMN and Invasive Cardiovascular infections. Infect Immun 2021; 89:e0034721. [PMID: 34227840 PMCID: PMC8445198 DOI: 10.1128/iai.00347-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 06/23/2021] [Indexed: 11/20/2022] Open
Abstract
GraS is a membrane sensor in Staphylococcus aureus that induces mprF and dltABCD expression to alter the surface positive charge upon exposure to cationic human defense peptides (HDPs). The sensing domain of GraS likely resides in the 9-residue extracellular loop (EL). In this study, we assessed a hospital-acquired methicillin-resistant S. aureus (HA-MRSA) strain (COL) for the specific role of two distinct EL mutations: F38G (bulk) and D/35/37/41K (charged inversion). Activation of mprF by polymyxin B (PMB) was reduced in the D35/37/41K mutant versus the D35/37/41G mutant, correlating with reduced surface positive charge; in contrast, these effects were less prominent in the F38G mutant but still lower than those in the parent. These data indicated that both electrostatic charge and steric bulk of the EL of GraS influence induction of genes impacting HDP resistance. Using mprF expression as a readout, we confirmed GraS signaling was pH dependent, increasing as pH was lowered (from pH 7.5 down to pH 5.5). In contrast to PMB activation, reduction of mprF was comparable at pH 5.5 between the P38G and D35/37/41K point mutants, indicating a mechanistic divergence between GraS activation by acidic pH versus cationic peptides. Survival assays in human blood and purified polymorphonuclear leukocytes (PMNs) revealed lower survival of the D35/37/41K mutant versus the F38G mutant, with both being lower than that of the parent. Virulence studies in the rabbit endocarditis model mirrored whole blood and PMN killing assay data described above. Collectively, these data confirmed the importance of specific residues within the EL of GraS in conferring essential bacterial responses for MRSA survival in infections.
Collapse
Affiliation(s)
- Ambrose L. Cheung
- Department of Microbiology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Junho Cho
- Department of Microbiology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Arnold S. Bayer
- The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, California, USA
- Department of Medicine, Division of Infectious Diseases, Harbor-UCLA Medical Center, Torrance, California, USA
- The David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Michael R. Yeaman
- The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, California, USA
- Department of Medicine, Division of Infectious Diseases, Harbor-UCLA Medical Center, Torrance, California, USA
- The David Geffen School of Medicine at UCLA, Los Angeles, California, USA
- Department of Medicine, Division of Molecular Medicine, Harbor-UCLA Medical Center, Torrance, California, USA
| | - Yan Q. Xiong
- The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, California, USA
- Department of Medicine, Division of Infectious Diseases, Harbor-UCLA Medical Center, Torrance, California, USA
- The David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Niles P. Donegan
- Department of Microbiology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Irina V. Mikheyeva
- Department of Microbiology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Gi Yong Lee
- Department of Veterinary Microbiology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Soo-Jin Yang
- Department of Veterinary Microbiology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| |
Collapse
|
30
|
Mohd Faizal MN, Ismail N, M S Eldeen I, Mariam T. Antibacterial and Antifouling Properties of the Horseshoe Crab Carcinoscorpius rotundicauda. Pak J Biol Sci 2021; 24:579-587. [PMID: 34486333 DOI: 10.3923/pjbs.2021.579.587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
<b>Background and Objective:</b> Horseshoe crabs are widely used in both traditional and modern pharmaceutical applications. Most of the previous studies on horseshoe crabs focused on their blood which contains hemolymph and amoebocyte lysate. This study aimed to determine the potential antibacterial and antifouling properties of different extracts from the carapace and the book gills of <i>Carcinoscorpius rotundicauda</i>. <b>Materials and Methods:</b> The crude extracts were subjected to the bioactivity tests using the disc-diffusion and the inhibition of biofilm-formation measurement assays, for both the antibacterial and antifouling activities respectively. <b>Results:</b> The results obtained indicated that the carapace extracts had stronger antibacterial and antifouling effects compared to the book gills extracts. Extracts obtained from the male displayed more activity compared to the extracts from the female with a few exceptions. Methanol and acetone carapace crude extracts showed the best overall performance. A sterol compound was isolated from the carapace acetone extracts of the male of <i>C. rotundicauda</i>. However, the compound did not display strong activity compared to the crude extract. The compound might be contributing to the observed activity with other components through a synergistic effect. <b>Conclusion:</b> The presence of antibacterial and antifouling activities in the carapace and book gills extracts could be added to the complexity of the defence mechanisms of horseshoe crabs. The results of this study, therefore, may contribute to the knowledge of the defence mechanisms of <i>C. rotundicauda</i>. Further research is needed to determine the bioactivities of other parts of the animal and to explore their potential applications.
Collapse
|
31
|
M Hassan M, Lagha R, Mabrouk I, Alhomrani M, Alorabi JA, Gaber A, Ben Abdallah F. Molecular Investigation of Multidrug-Resistant Escherichia coli Clinical Isolates from Patients with Urinary Tract Infections. Pak J Biol Sci 2021; 24:636-645. [PMID: 34486339 DOI: 10.3923/pjbs.2021.636.645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
<b>Background and Objective:</b> Urinary tract infections believe to be one of the main acquainted infections by <i>Escherichia coli</i> in hospitals with an excessive incidence of illness. This study aimed to analyze the antibiotic resistance profile and molecular characteristics of <i>E. coli</i> isolates recovered from patients with urinary tract infection at different hospitals in Taif Governorate, Saudi Arabia. <b>Materials and Methods:</b> Out of 143 isolates collected for 11 months, from February-December 2019, 24 isolates were identified as <i>E. coli</i> by API system and 16S rRNA sequences techniques. An antibiotic sensitivity test was performed using the disk diffusion method. Besides, the repetitive sequence repeat-PCR (Rep-PCR) technique was used for genotyping the 24 isolates. <b>Results:</b> Almost all isolates were resistant to most tested antibiotics such as ampicillin, ceftazidime, cefepime, trimethoprim/sulfamethoxazole, amox/clavulanic. The PCR results show that virulence genes <i>kpsII</i> and <i>yaiO</i> were detected in all <i>E. coli</i> isolates. <i>Stx1</i>, <i>fimH</i>, <i>hly</i> and <i>uidA</i> were moderate detected in all isolates. <b>Conclusion:</b> The high frequencies of antibiotic-resistant <i>E. coli</i> isolates in patients with urinary tract infections in the current study suggest that continuous surveillance of the use of appropriate antibiotics is required and that control of infections is necessary.
Collapse
|
32
|
Al-Zaban M, Naghmouchi S, AlHarbi NK. HPLC-Analysis, Biological Activities and Characterization of Action Mode of Saudi Marrubium vulgare against Foodborne Diseases Bacteria. Molecules 2021; 26:molecules26175112. [PMID: 34500546 PMCID: PMC8434504 DOI: 10.3390/molecules26175112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/15/2021] [Accepted: 08/17/2021] [Indexed: 11/16/2022] Open
Abstract
The present study aims to evaluate the chemical composition, metabolites secondary and pharmacology activities of methanolic extract of Marrubium vulgare collected from King Saudi Arabia. Moreover, the primary mode of action of the tested extract was studied here for the first time against E. coli and L. monocytogenes. HPLC analysis shows that the major components in the tested extract are luteolin-7-O-d-glucoside, ferulic acid and premarrubiin. Obtained data demonstrated that the investigated extract was richer in phenol (26.8 ± 0.01 mg/GAE g) than in flavonoids (0.61 ± 0.05 mg EC/mL). In addition, the methanolic extract showed an important antioxidant capacity against the DPPH (IC50 = 35 ± 0.01 µg/mL) and ABTS (IC50 = 25 ± 0.2 µg/mL) radical scavenging and a strong inhibition of acetylcholinesterase enzyme with an IC50 value corresponding to 0.4 mg/mL. The antibacterial activity demonstrated that the evaluated extract had significant activity against both Gram-positive and Gram-negative bacteria. The effect of time on cell integrity on E. coli and L. monocytogenes determined by time-kill and bacteriolysis tests showed that the M. vulgare extract reduced the viability of both strains after 8 and 10 h and had a bacteriolytic effect against two different categories of bacteria, Gram-positive and negative, which are not of the same potency. Based on obtained data, it can be concluded that Saudi M. vulgare has a high pharmacological importance and can be used in preparation of food or drugs.
Collapse
Affiliation(s)
- Mayasar Al-Zaban
- Biology Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi Arabia; (S.N.); (N.K.A.)
- Correspondence:
| | - Souheila Naghmouchi
- Biology Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi Arabia; (S.N.); (N.K.A.)
- National Research Institute of Rural Engineering, Water and Forestry, University of Tunis Carthage, Street of Hedi Karay BP N 10, Ariana 2080, Tunisia
| | - Nada K. AlHarbi
- Biology Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi Arabia; (S.N.); (N.K.A.)
| |
Collapse
|
33
|
In brief: Oritavancin (Kimyrsa) for skin and skin structure infections. Med Lett Drugs Ther 2021; 63:e1-2. [PMID: 34544104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
|
34
|
Sychantha D, Rotondo CM, Tehrani KHME, Martin NI, Wright GD. Aspergillomarasmine A inhibits metallo-β-lactamases by selectively sequestering Zn 2. J Biol Chem 2021; 297:100918. [PMID: 34181945 PMCID: PMC8319579 DOI: 10.1016/j.jbc.2021.100918] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/14/2021] [Accepted: 06/23/2021] [Indexed: 11/05/2022] Open
Abstract
Class B metallo-β-lactamases (MBLs) are Zn2+-dependent enzymes that catalyze the hydrolysis of β-lactam antibiotics to confer resistance in bacteria. Several problematic groups of MBLs belong to subclass B1, including the binuclear New Delhi MBL (NDM), Verona integrin-encoded MBL, and imipenemase-type enzymes, which are responsible for widespread antibiotic resistance. Aspergillomarasmine A (AMA) is a natural aminopolycarboxylic acid that functions as an effective inhibitor of class B1 MBLs. The precise mechanism of action of AMA is not thoroughly understood, but it is known to inactivate MBLs by removing one catalytic Zn2+ cofactor. We investigated the kinetics of MBL inactivation in detail and report that AMA is a selective Zn2+ scavenger that indirectly inactivates NDM-1 by encouraging the dissociation of a metal cofactor. To further investigate the mechanism in living bacteria, we used an active site probe and showed that AMA causes the loss of a Zn2+ ion from a low-affinity binding site of NDM-1. Zn2+-depleted NDM-1 is rapidly degraded, contributing to the efficacy of AMA as a β-lactam potentiator. However, MBLs with higher metal affinity and stability such as NDM-6 and imipenemase-7 exhibit greater tolerance to AMA. These results indicate that the mechanism of AMA is broadly applicable to diverse Zn2+ chelators and highlight that leveraging Zn2+ availability can influence the survival of MBL-producing bacteria when they are exposed to β-lactam antibiotics.
Collapse
Affiliation(s)
- David Sychantha
- David Braley Centre for Antibiotic Discovery, McMaster University, Hamilton, Ontario, Canada; M.G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada; Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Caitlyn M Rotondo
- David Braley Centre for Antibiotic Discovery, McMaster University, Hamilton, Ontario, Canada; M.G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada; Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Kamaleddin H M E Tehrani
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, Leiden, The Netherlands
| | - Nathaniel I Martin
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, Leiden, The Netherlands
| | - Gerard D Wright
- David Braley Centre for Antibiotic Discovery, McMaster University, Hamilton, Ontario, Canada; M.G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada; Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada.
| |
Collapse
|
35
|
Wang M, Zhang Y, Wang R, Wang Z, Yang B, Kuang H. An Evolving Technology That Integrates Classical Methods with Continuous Technological Developments: Thin-Layer Chromatography Bioautography. Molecules 2021; 26:4647. [PMID: 34361800 PMCID: PMC8347725 DOI: 10.3390/molecules26154647] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 07/24/2021] [Accepted: 07/27/2021] [Indexed: 12/20/2022] Open
Abstract
Thin-layer chromatography (TLC) bioautography is an evolving technology that integrates the separation and analysis technology of TLC with biological activity detection technology, which has shown a steep rise in popularity over the past few decades. It connects TLC with convenient, economic and intuitive features and bioautography with high levels of sensitivity and specificity. In this study, we discuss the research progress of TLC bioautography and then establish a definite timeline to introduce it. This review summarizes known TLC bioautography types and practical applications for determining antibacterial, antifungal, antitumor and antioxidant compounds and for inhibiting glucosidase, pancreatic lipase, tyrosinase and cholinesterase activity constitutes. Nowadays, especially during the COVID-19 pandemic, it is important to identify original, natural products with anti-COVID potential compounds from Chinese traditional medicine and natural medicinal plants. We also give an account of detection techniques, including in situ and ex situ techniques; even in situ ion sources represent a major reform. Considering the current technical innovations, we propose that the technology will make more progress in TLC plates with higher separation and detection technology with a more portable and extensive scope of application. We believe this technology will be diffusely applied in medicine, biology, agriculture, animal husbandry, garden forestry, environmental management and other fields in the future.
Collapse
Affiliation(s)
| | | | | | | | | | - Haixue Kuang
- Key Laboratory of Chinese Materia Medica (Ministry of Education), Heilongjiang University of Chinese Medicine, Harbin 150000, China; (M.W.); (Y.Z.); (R.W.); (Z.W.); (B.Y.)
| |
Collapse
|
36
|
Zheng Y, Shang Y, Li M, Li Y, Ouyang W. Antifungal Activities of cis- trans Citral Isomers against Trichophyton rubrum with ERG6 as a Potential Target. Molecules 2021; 26:molecules26144263. [PMID: 34299538 PMCID: PMC8304469 DOI: 10.3390/molecules26144263] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 07/05/2021] [Accepted: 07/10/2021] [Indexed: 02/07/2023] Open
Abstract
Trichophyton rubrum causes ringworm worldwide. Citral (CIT), extracted from Pectis plants, is a monoterpene and naturally composed of geometric isomers neral (cis-citral) and geranial (trans-citral). CIT has promising antifungal activities and ergosterol biosynthesis inhibition effects against several pathogenic fungi. However, no study has focused on neral and geranial against T. rubrum, which hinders the clinical application of CIT. This study aimed to compare antifungal activities of neral and geranial and preliminarily elucidate their ergosterol biosynthesis inhibition mechanism against T. rubrum. Herein, the disc diffusion assays, cellular leakage measurement, flow cytometry, SEM/TEM observation, sterol quantification, and sterol pattern change analyses were employed. The results showed geranial exhibited larger inhibition zones (p < 0.01 or 0.05), higher cellular leakage rates (p < 0.01), increased conidia with damaged membranes (p < 0.01) within 24 h, more distinct shriveled mycelium in SEM, prominent cellular material leakage, membrane damage, and morphological changes in TEM. Furthermore, geranial possessed more promising ergosterol biosynthesis inhibition effects than neral, and both induced the synthesis of 7-Dehydrodesmosterol and Cholesta-5,7,22,24-tetraen-3β-ol, which represented marker sterols when ERG6 was affected. These results suggest geranial is more potent than neral against T. rubrum, and both inhibit ergosterol biosynthesis by affecting ERG6.
Collapse
Affiliation(s)
- Yin Zheng
- College of Animal Science, Guizhou University, Guiyang 550025, China
- Correspondence: ; Tel.: +86-182-8519-3257
| | - Yanhong Shang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China;
| | - Mengyun Li
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China;
| | - Yunzhou Li
- College of Agriculture Science, Guizhou University, Guiyang 550025, China;
| | - Wuqing Ouyang
- College of Veterinary Science, Northwest A&F University, Yangling 712100, China;
| |
Collapse
|
37
|
Noval M, Heil EL, Williams P, Johnson JK, Claeys KC. The potential impact of discrepancies between automated susceptibility platforms and other testing metho`dologies for cefazolin in the treatment of Enterobacterales bloodstream infections. Diagn Microbiol Infect Dis 2021; 101:115483. [PMID: 34339950 DOI: 10.1016/j.diagmicrobio.2021.115483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 04/29/2021] [Accepted: 07/02/2021] [Indexed: 11/15/2022]
Abstract
Revised breakpoints for cefazolin (CFZ) against Enterobacterales may be difficult to implement with current automated susceptibility testing platforms and could falsely report organisms as susceptible, leading to inappropriate treatment for bloodstream infections (BSI). This was a retrospective cohort of adult patients with Enterobacterales BSI reported CFZ susceptible per Vitek®2. The primary outcome was the percentage susceptible by minimum inhibitory concentration (MIC) Gradient Test Strips and disk diffusion. Secondary outcomes included clinical outcomes between CFZ and non-CFZ-treated patients. Among 195 isolates reported CFZ-susceptible per Vitek®2, 84 (43.1%) were CFZ susceptible by MIC Gradient Test Strips vs 119 (61%) by disk diffusion. No difference was noted in 30-day all-cause mortality, secondary complications, or 30-day readmissions. Treatment failure was less likely to occur with source control (adjusted OR 0.06) and infectious disease consult (adjusted OR 0.37). There was a large degree of discrepancy between automated testing and manual methods; the clinical impact of this discrepancy warrants further investigation.
Collapse
Affiliation(s)
- Mandee Noval
- Department of Pharmacy, University of Maryland Medical Center, Baltimore, MD, USA.
| | - Emily L Heil
- Department of Pharmacy, University of Maryland School of Pharmacy, Baltimore, MD, USA
| | - Paula Williams
- Department of Laboratories and Pathology, University of Maryland Medical Center, Baltimore, MD, USA
| | - J Kristie Johnson
- Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Kimberly C Claeys
- Department of Pharmacy, University of Maryland School of Pharmacy, Baltimore, MD, USA
| |
Collapse
|
38
|
Alfei S, Caviglia D, Piatti G, Zuccari G, Schito AM. Bactericidal Activity of a Self-Biodegradable Lysine-Containing Dendrimer against Clinical Isolates of Acinetobacter Genus. Int J Mol Sci 2021; 22:7274. [PMID: 34298891 PMCID: PMC8306826 DOI: 10.3390/ijms22147274] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/03/2021] [Accepted: 07/05/2021] [Indexed: 12/19/2022] Open
Abstract
The genus Acinetobacter consists of Gram-negative obligate aerobic pathogens, including clinically relevant species, such as A. baumannii, which frequently cause hospital infections, affecting debilitated patients. The growing resistance to antimicrobial therapies shown by A. baumannii is reaching unacceptable levels in clinical practice, and there is growing concern that the serious conditions it causes may soon become incurable. New therapeutic possibilities are, therefore, urgently needed to circumvent this important problem. Synthetic cationic macromolecules, such as cationic antimicrobial peptides (AMPs), which act as membrane disrupters, could find application in these conditions. A lysine-modified cationic polyester-based dendrimer (G5-PDK), capable of electrostatically interacting with bacterial surfaces as AMPs do, has been synthesized and characterized here. Given its chemical structure, similar to that of a fifth-generation lysine containing dendrimer (G5K) with a different core, and previously found inactive against Gram-positive bacterial species and Enterobacteriaceae, the new G5-PDK was also ineffective on the species mentioned above. In contrast, it showed minimum inhibitory concentration values (MICs) lower than reported for several AMPs and other synthetic cationic compounds on Acinetobacter genus (3.2-12.7 µM). Time-kill experiments on A. baumannii, A. pittii, and A. ursingii ascertained the rapid bactericidal effects of G5-PDK, while subsequent bacterial regrowth supported its self-biodegradability.
Collapse
Affiliation(s)
- Silvana Alfei
- Department of Pharmacy, University of Genoa, Viale Cembrano, 16148 Genoa, Italy;
| | - Debora Caviglia
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Viale Benedetto XV, 6, 16132 Genova, Italy; (D.C.); (G.P.); (A.M.S.)
| | - Gabriella Piatti
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Viale Benedetto XV, 6, 16132 Genova, Italy; (D.C.); (G.P.); (A.M.S.)
| | - Guendalina Zuccari
- Department of Pharmacy, University of Genoa, Viale Cembrano, 16148 Genoa, Italy;
| | - Anna Maria Schito
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Viale Benedetto XV, 6, 16132 Genova, Italy; (D.C.); (G.P.); (A.M.S.)
| |
Collapse
|
39
|
Abstract
Antifungal assay in vitro is a useful tool for the characterization of biological activity of microbial extracts. Here we describe a simple in vitro test at two final extract concentrations that allows long-term storage of the plates containing dry extracts before using. The assay protocol is described for two fungal strains, a unicellular yeast, with clinical interest (Candida albicans), and a sporulated and phytopathogenic filamentous fungus (Botrytis cinerea). They could serve as models for adapting other filamentous/yeast-like fungi.Plates are prepared by placing 100 and 10 μg, respectively, of the organic extracts in microtiter 96-well plates, where the test will be performed. The assay develops by adding 200 μL of a spore suspension 104 spores/mL for B. cinerea and 106 cells/mL for C. albicans in Sabouraud medium.After the incubation of the plates at 25 °C, for 2 days for C. albicans and 5 days for B. cinerea , the growth of the fungal targets is evaluated in a plate reader for unicellular yeast , or visually under the microscope for filamentous fungi. If visually evaluated, observed growth can be assigned to different categories by comparison with growth control and inhibition control. Inhibition effect on C. albicans at eight concentrations of amphotericin B (8-4-2-1-0.5-0.25-0.125-0.00625 μg/mL) or B. cinerea exposed of eight concentrations of iprodione (100-50-10-5-1-0.5-0.1-0.05 μg/mL) are used as inhibition controls, respectively.
Collapse
Affiliation(s)
- María A Vinuesa
- Mycology Department, Biomar Microbial Technologies S.A., Parque Tecnológico de León, León, Spain.
| | - Antonio Fernández
- Bacteriology Department, Biomar Microbial Technologies S.A., León, Spain
| |
Collapse
|
40
|
Suresh D, Sabir S, Yu TT, Wenholz D, Das T, Black DS, Kumar N. Natural Product Rottlerin Derivatives Targeting Quorum Sensing. Molecules 2021; 26:molecules26123745. [PMID: 34205355 PMCID: PMC8235494 DOI: 10.3390/molecules26123745] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/07/2021] [Accepted: 06/16/2021] [Indexed: 12/31/2022] Open
Abstract
Rottlerin is a natural product consisting of chalcone and flavonoid scaffolds, both of which have previously shown quorum sensing (QS) inhibition in various bacteria. Therefore, the unique rottlerin scaffold highlights great potential in inhibiting the QS system of Pseudomonas aeruginosa. Rottlerin analogues were synthesised by modifications at its chalcone- and methylene-bridged acetophenone moieties. The synthesis of analogues was achieved using an established five-step synthetic strategy for chalcone derivatives and utilising the Mannich reaction at C6 of the chromene to construct morpholine analogues. Several pyranochromene chalcone derivatives were also generated using aldol conditions. All the synthetic rottlerin derivatives were screened for QS inhibition and growth inhibition against the related LasR QS system. The pyranochromene chalcone structures displayed high QS inhibitory activity with the most potent compounds, 8b and 8d, achieving QS inhibition of 49.4% and 40.6% and no effect on bacterial growth inhibition at 31 µM, respectively. Both compounds also displayed moderate biofilm inhibitory activity and reduced the production of pyocyanin.
Collapse
Affiliation(s)
- Dittu Suresh
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia; (D.S.); (S.S.); (T.T.Y.); (D.W.)
| | - Shekh Sabir
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia; (D.S.); (S.S.); (T.T.Y.); (D.W.)
| | - Tsz Tin Yu
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia; (D.S.); (S.S.); (T.T.Y.); (D.W.)
| | - Daniel Wenholz
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia; (D.S.); (S.S.); (T.T.Y.); (D.W.)
| | - Theerthankar Das
- Department of Infectious Diseases and Immunology, School of Medical Sciences, The University of Sydney, Sydney, NSW 2006, Australia;
| | - David StC. Black
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia; (D.S.); (S.S.); (T.T.Y.); (D.W.)
- Correspondence: (D.S.B.); (N.K.); Tel.: +61-29385-4698 (N.K.); Fax: +61-29385-6141 (N.K.)
| | - Naresh Kumar
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia; (D.S.); (S.S.); (T.T.Y.); (D.W.)
- Correspondence: (D.S.B.); (N.K.); Tel.: +61-29385-4698 (N.K.); Fax: +61-29385-6141 (N.K.)
| |
Collapse
|
41
|
Soliman SM, Massoud RA, Al-Rasheed HH, El-Faham A. Syntheses and Structural Investigations of Penta-Coordinated Co(II) Complexes with Bis-Pyrazolo- S-Triazine Pincer Ligands, and Evaluation of Their Antimicrobial and Antioxidant Activities. Molecules 2021; 26:molecules26123633. [PMID: 34198604 PMCID: PMC8232275 DOI: 10.3390/molecules26123633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/10/2021] [Accepted: 06/11/2021] [Indexed: 01/01/2023] Open
Abstract
Two penta-coordinated [Co(MorphBPT)Cl2]; 1 and [Co(PipBPT)Cl2]; 2 complexes with the bis-pyrazolyl-s-triazine pincer ligands MorphBPT and PipBPT were synthesized and characterized. Both MorphBPT and PipBPT act as NNN-tridentate pincer chelates coordinating the Co(II) center with one short Co-N(s-triazine) and two longer Co-N(pyrazole) bonds. The coordination number of Co(II) is five in both complexes, and the geometry around Co(II) ion is a distorted square pyramidal in 1, while 2 shows more distortion. In both complexes, the packing is dominated by Cl…H, C-H…π, and Cl…C (anion-π stacking) interactions in addition to O…H interactions, which are found only in 1. The UV-Vis spectral band at 564 nm was assigned to metal–ligand charge transfer transitions based on TD-DFT calculations. Complexes 1 and 2 showed higher antimicrobial activity compared to the respective free ligand MorphBPT and PipBPT, which were not active. MIC values indicated that 2 had better activity against S. aureus, B. subtilis, and P. vulgaris than 1. DPPH free radical scavenging assay revealed that all the studied compounds showed weak to moderate antioxidant activity where the nature of the substituent at the s-triazine core has a significant impact on the antioxidant activity.
Collapse
Affiliation(s)
- Saied M. Soliman
- Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt;
- Correspondence: (S.M.S.); (A.E.-F.); Tel.: +20-111-1361-059 (S.M.S.); +966-114-673-195 (A.E.-F.)
| | - Raghdaa A. Massoud
- Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt;
| | - Hessa H. Al-Rasheed
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
| | - Ayman El-Faham
- Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt;
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
- Correspondence: (S.M.S.); (A.E.-F.); Tel.: +20-111-1361-059 (S.M.S.); +966-114-673-195 (A.E.-F.)
| |
Collapse
|
42
|
Kim SH, Lee JH, Kim SE, Shin SH, Kim HJ, Lee SJ, Kim JH, Suh IS. Retrospective study of the efficacy of vascularized tissue transfer for treating antibiotic-resistant bacteria-infected wound: Comparison with clean and antibiotic-sensitive bacteria-infected wound. Medicine (Baltimore) 2021; 100:e25907. [PMID: 34114986 PMCID: PMC8202535 DOI: 10.1097/md.0000000000025907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 04/22/2021] [Indexed: 01/04/2023] Open
Abstract
If wounds are infected with bacteria resistant to an empirical antibiotic regimen, effective wound treatment will be delayed. This can delay wound healing and lengthen hospital stays, increasing the costs to patients. Long-term antibiotic use can also result in minor and major complications, such as diarrhea, antibiotic resistance, or life-threatening leukopenia. Multidrug-resistant (MDR) bacteria make wound treatment even more difficult. Traditionally, surgeons thought that adequate infection control should be established before soft tissue coverage. However, wounds infected by MDR do not heal well with this traditional method and there are no optimal treatment guidelines for MDR bacteria-contaminated wounds.We reviewed 203 patients who underwent vascularized flap surgery from 2012 to 2019 to cover wounds. Class IV and I wounds were compared according to the Centers for Disease Control and Prevention classification. Class IV was further classified as antibiotic-resistant (ARB) and antibiotic-sensitive (ASB) bacteria. Wound size, mode, location, pathogens, healing time, and basic demographics were evaluated. Data were compared using Cramer's V and one-way ANOVA or independent t tests.The average healing time was longer in the ARB (19.7 [range 7-44] days) and ASB (17.9 [range 2-36] days) groups than in the Clean group (16.5 [range 7-28] days). Healing time differed in the 3 groups (P = .036). It was longer in the class IV group than in the class I group (P = .01). However, it was not statistically different between the ARB and ASB groups (P = .164).In our study the difference in healing time was small when vascularized tissue transfer was done in ARB-infected wound compared with ASB-infected and clean wound. It is necessary to perform surgery using vascularized tissue for the infected wound of antibiotic-resistant bacteria.
Collapse
Affiliation(s)
- Seong Hwan Kim
- Department of Plastic and Reconstructive Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul
| | - Ju Ho Lee
- Department of Plastic and Reconstructive Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul
| | - Seong Eun Kim
- Department of Internal Medicine, Division of Infectious Diseases, Chonnam National University Hospital, Gwangju, Korea
| | - Se Ho Shin
- Department of Plastic and Reconstructive Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul
| | - Hyeon Jo Kim
- Department of Plastic and Reconstructive Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul
| | - Seong Joo Lee
- Department of Plastic and Reconstructive Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul
| | - Jae Hyun Kim
- Department of Plastic and Reconstructive Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul
| | - In Suck Suh
- Department of Plastic and Reconstructive Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul
| |
Collapse
|
43
|
Zuo XY, Gao H, Gao ML, Jin Z, Tang YZ. Antibacterial Activity of a Promising Antibacterial Agent: 22-(4-(2-(4-Nitrophenyl-piperazin-1-yl)-acetyl)-piperazin-1-yl)-22-deoxypleuromutilin. Molecules 2021; 26:3502. [PMID: 34201372 PMCID: PMC8227856 DOI: 10.3390/molecules26123502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/21/2021] [Accepted: 06/05/2021] [Indexed: 12/02/2022] Open
Abstract
A novel pleuromutilin derivative, 22-(4-(2-(4-nitrophenyl-piperazin-1-yl)-acetyl)-piperazin-1-yl)-22-deoxypleuromutilin (NPDM), was synthesized in our laboratory and proved excellent antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA). In this study, more methods were used to further study its preliminary pharmacological effect. The antibacterial efficacy and toxicity of NPDM were evaluated using tiamulin as the reference drug. The in vitro antibacterial activity study showed that NPDM is a potent bactericidal agent against MRSA that induced time-dependent growth inhibition and a concentration-dependent post-antibiotic effect (PAE). Toxicity determination showed that the cytotoxicity of NPDM was slightly higher than that of tiamulin, but the acute oral toxicity study proved that NPDM was a low-toxic compound. In an in vivo antibacterial effect study, NPDM exhibited a better therapeutic effect than tiamulin against MRSA in a mouse thigh infection model as well as a mouse systemic infection model with neutropenia. The 50% effective dose (ED50) of NPDM in a Galleria mellonella infection model was 50.53 mg/kg. The pharmacokinetic properties of NPDM were also measured, which showed that NPDM was a rapid elimination drug in mice.
Collapse
Affiliation(s)
- Xiang-Yi Zuo
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (X.-Y.Z.); (H.G.); (M.-L.G.); (Z.J.)
| | - Hong Gao
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (X.-Y.Z.); (H.G.); (M.-L.G.); (Z.J.)
| | - Mei-Ling Gao
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (X.-Y.Z.); (H.G.); (M.-L.G.); (Z.J.)
| | - Zhen Jin
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (X.-Y.Z.); (H.G.); (M.-L.G.); (Z.J.)
| | - You-Zhi Tang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (X.-Y.Z.); (H.G.); (M.-L.G.); (Z.J.)
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| |
Collapse
|
44
|
Sumabe BK, Ræder SB, Røst LM, Sharma A, Donkor ES, Mosi L, Duodu S, Bruheim P, Otterlei M. Nucleoside Analogues Are Potent Inducers of Pol V-mediated Mutagenesis. Biomolecules 2021; 11:843. [PMID: 34198819 PMCID: PMC8227612 DOI: 10.3390/biom11060843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/01/2021] [Accepted: 06/02/2021] [Indexed: 11/18/2022] Open
Abstract
Drugs targeting DNA and RNA in mammalian cells or viruses can also affect bacteria present in the host and thereby induce the bacterial SOS system. This has the potential to increase mutagenesis and the development of antimicrobial resistance (AMR). Here, we have examined nucleoside analogues (NAs) commonly used in anti-viral and anti-cancer therapies for potential effects on mutagenesis in Escherichia coli, using the rifampicin mutagenicity assay. To further explore the mode of action of the NAs, we applied E. coli deletion mutants, a peptide inhibiting Pol V (APIM-peptide) and metabolome and proteome analyses. Five out of the thirteen NAs examined, including three nucleoside reverse transcriptase inhibitors (NRTIs) and two anti-cancer drugs, increased the mutation frequency in E. coli by more than 25-fold at doses that were within reported plasma concentration range (Pl.CR), but that did not affect bacterial growth. We show that the SOS response is induced and that the increase in mutation frequency is mediated by the TLS polymerase Pol V. Quantitative mass spectrometry-based metabolite profiling did not reveal large changes in nucleoside phosphate or other central carbon metabolite pools, which suggests that the SOS induction is an effect of increased replicative stress. Our results suggest that NAs/NRTIs can contribute to the development of AMR and that drugs inhibiting Pol V can reverse this mutagenesis.
Collapse
Affiliation(s)
- Balagra Kasim Sumabe
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU, Norwegian University of Science and Technology, NO-7489 Trondheim, Norway; (B.K.S.); (S.B.R.)
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, P.O. BOX LG 54 Accra, Ghana; (L.M.); (S.D.)
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, P.O. BOX LG 54 Accra, Ghana
| | - Synnøve Brandt Ræder
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU, Norwegian University of Science and Technology, NO-7489 Trondheim, Norway; (B.K.S.); (S.B.R.)
| | - Lisa Marie Røst
- Department of Biotechnology and Food Science, Faculty of Natural Sciences, NTNU Norwegian University of Science and Technology, NO-7481 Trondheim, Norway; (L.M.R.); (P.B.)
| | - Animesh Sharma
- Proteomics and Modomics Experimental Core Facility (PROMEC), NTNU Norwegian University of Science and Technology, NO-7481 Trondheim, Norway;
| | - Eric S. Donkor
- Department of Medical Microbiology, University of Ghana Medical School, P.O. Box 4236 Accra, Ghana;
| | - Lydia Mosi
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, P.O. BOX LG 54 Accra, Ghana; (L.M.); (S.D.)
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, P.O. BOX LG 54 Accra, Ghana
| | - Samuel Duodu
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, P.O. BOX LG 54 Accra, Ghana; (L.M.); (S.D.)
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, P.O. BOX LG 54 Accra, Ghana
| | - Per Bruheim
- Department of Biotechnology and Food Science, Faculty of Natural Sciences, NTNU Norwegian University of Science and Technology, NO-7481 Trondheim, Norway; (L.M.R.); (P.B.)
| | - Marit Otterlei
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU, Norwegian University of Science and Technology, NO-7489 Trondheim, Norway; (B.K.S.); (S.B.R.)
- Clinic of Laboratory medicine, St. Olav University Hospital, NO-7006 Trondheim, Norway
| |
Collapse
|
45
|
Jasińska K, Zieniuk B, Nowak D, Fabiszewska A. Studies on the Catalytic Properties of Crude Freeze-Dried Preparations of Yarrowia lipolytica Extracellular Lipases for Geranyl Ester Derivative Synthesis. Biomolecules 2021; 11:biom11060839. [PMID: 34200103 PMCID: PMC8228730 DOI: 10.3390/biom11060839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/27/2021] [Accepted: 06/02/2021] [Indexed: 11/16/2022] Open
Abstract
The study aimed to evaluate the impact of selected factors of the freeze-drying process on the hydrolytic and synthetic activity of the extracellular lipases of Y. lipolytica KKP 379 and to attempt the use of the crude enzyme preparation as a biocatalyst in the synthesis of geranyl 4-hydroxyphenylpropanoate. Antioxidant and antibacterial properties of the geranyl ester derivative were also investigated in order to evaluate their usefulness as a novel food additive. The studies confirmed that freeze-drying was an effective method of dehydrating yeast supernatant and allowed for obtaining lyophilizates with low water activity from 0.055 to 0.160. The type and concentration of the additive (2-6% whey protein hydrolyzate, 0.5% and 1% ammonium sulphate) had a significant effect on the hydrolytic activity of enzyme preparations, while the selected variants of drying temperature during the freeze-drying process were not significant (10 °C and 50 °C). Low yield of geranyl 4-hydroxyphenylopropionate was shown when the lyophilized supernatant was used (5.3%), but the yield of ester synthesis increased when the freeze-dried Y. lipolytica yeast biomass was applied (47.9%). The study confirmed the antioxidant properties of the synthesized ester by the DPPH• and CUPRAC methods, as well as higher antibacterial activity against tested bacteria than its precursor with 0.125 mM MIC (minimal inhibitory concentration) against L. monocytogenes.
Collapse
Affiliation(s)
- Karina Jasińska
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences-SGGW, 159c Nowoursynowska St., 02-776 Warsaw, Poland; (K.J.); (A.F.)
| | - Bartłomiej Zieniuk
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences-SGGW, 159c Nowoursynowska St., 02-776 Warsaw, Poland; (K.J.); (A.F.)
- Correspondence: ; Tel.: +48-22-59-37-621
| | - Dorota Nowak
- Department of Food Engineering and Process Management, Institute of Food Sciences, Warsaw University of Life Sciences-SGGW, 159c Nowoursynowska St., 02-776 Warsaw, Poland;
| | - Agata Fabiszewska
- Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences-SGGW, 159c Nowoursynowska St., 02-776 Warsaw, Poland; (K.J.); (A.F.)
| |
Collapse
|
46
|
Sun PP, Won J, Choo-Kang G, Li S, Chen W, Monroy GL, Chaney EJ, Boppart SA, Eden JG, Nguyen TH. Inactivation and sensitization of Pseudomonas aeruginosa by microplasma jet array for treating otitis media. NPJ Biofilms Microbiomes 2021; 7:48. [PMID: 34078901 PMCID: PMC8172902 DOI: 10.1038/s41522-021-00219-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 04/28/2021] [Indexed: 02/04/2023] Open
Abstract
Otitis media (OM), known as a middle ear infection, is the leading cause of antibiotic prescriptions for children. With wide-spread use of antibiotics in OM, resistance to antibiotics continues to decrease the efficacy of the treatment. Furthermore, as the presence of a middle ear biofilm has contributed to this reduced susceptibility to antimicrobials, effective interventions are necessary. A miniaturized 3D-printed microplasma jet array has been developed to inactivate Pseudomonas aeruginosa, a common bacterial strain associated with OM. The experiments demonstrate the disruption of planktonic and biofilm P. aeruginosa by long-lived molecular species generated by microplasma, as well as the synergy of combining microplasma treatment with antibiotic therapy. In addition, a middle ear phantom model was developed with an excised rat eardrum to investigate the antimicrobial effects of microplasma on bacteria located behind the eardrum, as in a patient-relevant setup. These results suggest the potential for microplasma as a new treatment paradigm for OM.
Collapse
Affiliation(s)
- Peter P Sun
- Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA
- N. Holonyak, Jr. Micro and Nanotechnology Laboratory, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Jungeun Won
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Gabrielle Choo-Kang
- Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Shouyan Li
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Wenyuan Chen
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Guillermo L Monroy
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Eric J Chaney
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Stephen A Boppart
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Carle Illinois College of Medicine, University of Illinois Urbana-Champaign, Champaign, IL, USA.
| | - J Gary Eden
- N. Holonyak, Jr. Micro and Nanotechnology Laboratory, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA.
| | - Thanh H Nguyen
- Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Carle Illinois College of Medicine, University of Illinois Urbana-Champaign, Champaign, IL, USA.
- Carl R. Woese Institute for Genomic Biology, University of Illinois Urbana-Champaign, Urbana, IL, USA.
| |
Collapse
|
47
|
Dallavecchia DL, Ricardo E, da Silva AS, Rodrigues AG. Antibacterial and antifungal activity of excretions and secretions of Calliphora vicina. Med Vet Entomol 2021; 35:225-229. [PMID: 33063897 DOI: 10.1111/mve.12486] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 09/13/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
Antibiotic-resistant bacteria pose a major threat to global health in the 21st century, requiring a quick, cheap and effective response from public health officials. This study evaluated the antimicrobial activity of native excretions/secretions (NES) produced by third instar (3 days old) larvae of Calliphora vicina using a protocol adapted from the Institute of Clinical and Laboratory Standards (CLSI). The microorganisms tested were: Escherichia coli, Klebsiella pneumoniae, Staphylococcus aureus and the fungus Candida albicans. After the incubation period, the suspensions were diluted and spread on nutrient agar plates to count the colony-forming units. A turbidimetric test also was carried out to test the action of the NES of C. vicina against S. aureus, a very common bacterial species, with an enormous capacity for adaption and resistance, being one of the bacteria of medical importance that causes the most hospital and community infections in the world. According to our results, the NES of C. vicina exhibits antimicrobial activity at different dilutions, being most effective against the gram-negative bacteria E. coli and K. pneumoniae.
Collapse
Affiliation(s)
- D L Dallavecchia
- Microbiology Division, Department of Pathology, Faculty of Medicine, University of Porto - Alameda Prof. Hernani Monteiro, Porto, Portugal
- CAPES Foundation, Ministry of Education of Brazil, Brasília, Brazil
| | - E Ricardo
- Microbiology Division, Department of Pathology, Faculty of Medicine, University of Porto - Alameda Prof. Hernani Monteiro, Porto, Portugal
- Center for Health Technology and Services Research - CINTESIS, University of Porto, Porto, Portugal
| | - A S da Silva
- Department of Quantitative Methods, Federal University of the State of Rio de Janeiro - UNIRIO, Rio de Janeiro, Brazil
| | - A G Rodrigues
- Microbiology Division, Department of Pathology, Faculty of Medicine, University of Porto - Alameda Prof. Hernani Monteiro, Porto, Portugal
- Center for Health Technology and Services Research - CINTESIS, University of Porto, Porto, Portugal
- Burn Unit, São João Hospital Center, Porto, Portugal
| |
Collapse
|
48
|
Amini S, Kardan-Yamchi J, Kazemian H, Nasiri MJ, Hamzehloo G, Hoffner S, Feizabadi MM. The 7H11 Agar Medium Supplemented with Calf Bovine Serum for Susceptibility Testing of Mycobacterium tuberculosis Isolates Against Pyrazinamide. Microb Drug Resist 2021; 27:1652-1657. [PMID: 34077245 DOI: 10.1089/mdr.2020.0509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Despite its importance, pyrazinamide (PZA) is a blind spot in drug susceptibility testing in tuberculosis laboratories. The aim of this study was to set up a reliable agar-based proportion method for detection of PZA-resistant phenotypes using Middlebrook 7H11 agar supplemented with calf bovine serum (CBS) compared with albumin/dextrose/catalase (ADC) enrichment and pncA/rpsA sequencing results. The 7H11 agar medium supplemented with 10% ADC or 10% CBS (pH 6.2) and 100 μg/mL PZA was used to detect PZA resistance among 64 Mycobacterium tuberculosis isolates. Sanger sequencing and whole-genome sequencing were performed to track mutations in the pncA, rpsA, and their upstream regions. A total of 43 rifampicin/multidrug-resistant, 20 drug-susceptible, and 1 isoniazid mono-resistant M. tuberculosis isolates were investigated. The 7H11+ADC and 7H11+CBS could detect 22 and 23 PZA-resistant strains, respectively. With the same specificity, the sensitivity and accuracy of 7H11+CBS was found to be a little greater than 7H11+ADC in PZA resistance detection compared with sequencing results. Twenty-four mutant strains were found to have different mutations in pncA-upstream, pncA and rpsA genes, in which Gly97Asp was the most dominant mutation. The results obtained from 7H11+CBS were comparable to the results of 7H11+ADC. Therefore, the 7H11 agar proportion method would be a less-expensive test using CBS and produces reliable results.
Collapse
Affiliation(s)
- Sirus Amini
- Regional Reference Laboratory for Tuberculosis, Tehran University of Medical Sciences, Tehran, Iran
| | - Jalil Kardan-Yamchi
- Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Kazemian
- Department of Microbiology, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - Mohammad Javad Nasiri
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Gholamreza Hamzehloo
- Regional Reference Laboratory for Tuberculosis, Tehran University of Medical Sciences, Tehran, Iran
| | - Sven Hoffner
- Department of Global Public Health (GPH), Karolinska Institute, Stockholm, Sweden
| | - Mohammad Mehdi Feizabadi
- Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Thoracic Research Center, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
49
|
Mofolorunsho KC, Ocheni HO, Aminu RF, Omatola CA, Olowonibi OO. Prevalence and antimicrobial susceptibility of extended-spectrum beta lactamases-producing Escherichia coli and Klebsiella pneumoniae isolated in selected hospitals of Anyigba, Nigeria. Afr Health Sci 2021; 21:505-512. [PMID: 34795702 PMCID: PMC8568240 DOI: 10.4314/ahs.v21i2.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Escherichia coli and Klebsiella pneumoniae are commonly implicated in urinary tract infections accounting for majority of the antimicrobial resistance encountered in hospitals. OBJECTIVES To determine the prevalence and antimicrobial susceptibility of extended-spectrum beta-lactamases (ESBLs) producing E. coli and K. pneumoniae among patients in Anyigba, Nigeria. METHODS This hospital-based cross-sectional study was conducted using urine samples from 200 patients of Grimmard Catholic hospital and Maria Goretti hospital. Urine samples were processed to identify ESBL-producing E. coli and K. pneumoniae using standard microbiological techniques. Isolates were then tested against antimicrobial agents. RESULTS A total of 156 bacterial isolates were recovered consisting 128 of E. coli and 28 of K. pneumoniae. Extended spectrum beta-lactamases production was observed in 69% of E. coli and 31% of K. pneumoniae. These pathogens were resistant to 3 or more antibiotics. Of the antimicrobials tested, cefotaxime demonstrated the highest rates of resistance (100%) for both ESBL-producing E. coli and K. pneumoniae. Fifty-four isolates of ESBL-producing E. coli showed a high level of resistance to amoxicillin clavulanic acid (83.3%), ciprofloxacin (83.3%), and ceftazidime (79.6%). ESBL-positive K. pneumoniae isolates were highly resistant to ciprofloxacin (75%), and amoxicillin clavulanic acid (83.3%). Cefoxitin (62.5%) and gentamicin (66.7%) showed substantially higher rates of resistance against these isolates while all 24 strains were resistant to imipenem. CONCLUSION This study indicated the prevalence of ESBL-positive Gram-negative pathogens in these study sites and also demonstrated their resistance to a few antibiotics. This highlights the need for new antimicrobials that are potent and improved policy on use of antibiotics.
Collapse
Affiliation(s)
| | - Hannah O Ocheni
- Kogi State University, Faculty of Natural Sciences, Department of Microbiology
| | - Ruth F Aminu
- Kogi State University, Faculty of Natural Sciences, Department of Microbiology
| | - Cornelius A Omatola
- Kogi State University, Faculty of Natural Sciences, Department of Microbiology
| | | |
Collapse
|
50
|
Osorio M, Carvajal M, Vergara A, Butassi E, Zacchino S, Mascayano C, Montoya M, Mejías S, Martín MCS, Vásquez-Martínez Y. Prenylated Flavonoids with Potential Antimicrobial Activity: Synthesis, Biological Activity, and In Silico Study. Int J Mol Sci 2021; 22:ijms22115472. [PMID: 34067346 PMCID: PMC8196815 DOI: 10.3390/ijms22115472] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 12/11/2022] Open
Abstract
Prenylated flavonoids are an important class of naturally occurring flavonoids with important biological activity, but their low abundance in nature limits their application in medicines. Here, we showed the hemisynthesis and the determination of various biological activities of seven prenylated flavonoids, named 7–13, with an emphasis on antimicrobial ones. Compounds 9, 11, and 12 showed inhibitory activity against human pathogenic fungi. Compounds 11, 12 (flavanones) and 13 (isoflavone) were the most active against clinical isolated Staphylococcus aureus MRSA, showing that structural requirements as prenylation at position C-6 or C-8 and OH at positions C-5, 7, and 4′ are key to the antibacterial activity. The combination of 11 or 12 with commercial antibiotics synergistically enhanced the antibacterial activity of vancomycin, ciprofloxacin, and methicillin in a factor of 10 to 100 times against drug-resistant bacteria. Compound 11 combined with ciprofloxacin was able to decrease the levels of ROS generated by ciprofloxacin. According to docking results of S enantiomer of 11 with ATP-binding cassette transporter showed the most favorable binding energy; however, more studies are needed to support this result.
Collapse
Affiliation(s)
- Mauricio Osorio
- Laboratorio de Productos Naturales, Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso 2390123, Chile
- Correspondence: (M.O.); (Y.V.-M.)
| | - Marcela Carvajal
- Centro de Biotecnología CB-DAL, Universidad Técnica Federico Santa María, Valparaíso 2390136, Chile; (M.C.); (A.V.)
| | - Alejandra Vergara
- Centro de Biotecnología CB-DAL, Universidad Técnica Federico Santa María, Valparaíso 2390136, Chile; (M.C.); (A.V.)
| | - Estefania Butassi
- Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina; (E.B.); (S.Z.)
| | - Susana Zacchino
- Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina; (E.B.); (S.Z.)
| | - Carolina Mascayano
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile;
| | - Margarita Montoya
- Laboratorio Bioquímica Celular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile; (M.M.); (S.M.)
| | - Sophia Mejías
- Laboratorio Bioquímica Celular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile; (M.M.); (S.M.)
| | - Marcelo Cortez-San Martín
- Laboratorio de Virología Molecular y Control de Patógenos, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile;
| | - Yesseny Vásquez-Martínez
- Programa Centro de Investigaciones Biomédicas Aplicadas, Escuela de Medicina, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Santiago 9170022, Chile
- Correspondence: (M.O.); (Y.V.-M.)
| |
Collapse
|