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Rengaswami BV, Sudhakar U, Dhanasekaran M, Muthuvijayan G. Comparative Evaluation of L-PRF and Ofloxacin Incorporated L-PRF as an Adjunctive to SRP-A Split-Mouth Randomized Clinical Trial. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2024; 16:S1369-S1372. [PMID: 38882720 PMCID: PMC11174292 DOI: 10.4103/jpbs.jpbs_382_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/01/2023] [Accepted: 07/03/2023] [Indexed: 06/18/2024] Open
Abstract
Aim and Objectives To compare and evaluate the clinical efficacy of "ofloxacin incorporated L-PRF" and "L-PRF alone" when used as an adjuvant to non-surgical periodontal therapy. Materials and Methods A split-mouth study was conducted in 50 patients diagnosed as chronic periodontitis with pocket depth ≥6 with at least one site in each quadrant. All patients underwent scaling and root planning. Test site received with ofloxacin incorporated L-PRF and control site received L-PRF alone. Clinical parameters pocket depth (PD), plaque index (PI), and gingival bleeding index (GBI) were recorded at baseline and 1 month after scaling and root planning. Results In total, 100 sites were treated (50 test group and 50 control group) with no uneventful healing effects. Statistically significant decreases in PD (P = .0001 for both test and control groups), PI (P = .001), GBI (P = .001 for both groups), between pre-treatment and 1 month post-treatment were noted in both test and control groups. For intergroup comparisons, there was a statistically significant difference in all clinical indices (P > .005). Conclusion Use of L-PRF with ofloxacin as an adjuvant to non-surgical periodontal therapy showed better improvements in clinical parameters.
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Affiliation(s)
- Balaji V Rengaswami
- Department of Periodontics and Implant Dentistry, CSI College of Dental Sciences and Research, Madurai, Tamil Nadu, India
| | - Uma Sudhakar
- Department of Periodontics and Implant Dentistry, CSI College of Dental Sciences and Research, Madurai, Tamil Nadu, India
| | - Manikandan Dhanasekaran
- Department of Periodontics and Implant Dentistry, CSI College of Dental Sciences and Research, Madurai, Tamil Nadu, India
| | - Gokulnivas Muthuvijayan
- Department of Periodontics and Implant Dentistry, CSI College of Dental Sciences and Research, Madurai, Tamil Nadu, India
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2
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Pitout JDD, Peirano G, Matsumura Y, DeVinney R, Chen L. Escherichia coli sequence type 410 with carbapenemases: a paradigm shift within E. coli toward multidrug resistance. Antimicrob Agents Chemother 2024; 68:e0133923. [PMID: 38193668 PMCID: PMC10869336 DOI: 10.1128/aac.01339-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024] Open
Abstract
Escherichia coli sequence type ST410 is an emerging carbapenemase-producing multidrug-resistant (MDR) high-risk One-Health clone with the potential to significantly increase carbapenem resistance among E. coli. ST410 belongs to two clades (ST410-A and ST410-B) and three subclades (ST410-B1, ST410-B2, and ST410-B3). After a fimH switch between clades ST410-A and ST410-B1, ST410-B2 and ST410-B3 subclades showed a stepwise progression toward developing MDR. (i) ST410-B2 initially acquired fluoroquinolone resistance (via homologous recombination) in the 1980s. (ii) ST410-B2 then obtained CMY-2, CTX-M-15, and OXA-181 genes on different plasmid platforms during the 1990s. (iii) This was followed by the chromosomal integration of blaCMY-2, fstl YRIN insertion, and ompC/ompF mutations during the 2000s to create the ST410-B3 subclade. (iv) An IncF plasmid "replacement" scenario happened when ST410-B2 transformed into ST410-B3: F36:31:A4:B1 plasmids were replaced by F1:A1:B49 plasmids (both containing blaCTX-M-15) followed by blaNDM-5 incorporation during the 2010s. User-friendly cost-effective methods for the rapid identification of ST410 isolates and clades are needed because limited data are available about the frequencies and global distribution of ST410 clades. Basic mechanistic, evolutionary, surveillance, and clinical studies are urgently required to investigate the success of ST410 (including the ability to acquire successive MDR determinants). Such information will aid with management and prevention strategies to curb the spread of carbapenem-resistant E. coli. The medical community can ill afford to ignore the spread of a global E. coli clone with the potential to end the carbapenem era.
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Affiliation(s)
- Johann D. D. Pitout
- Cummings School of Medicine, Calcary, Alberta, Canada
- University of Calgary, Alberta Precision Laboratories, Calgary, Alberta, Canada
- University of Pretoria, Pretoria, Gauteng, South Africa
| | - Gisele Peirano
- Cummings School of Medicine, Calcary, Alberta, Canada
- University of Calgary, Alberta Precision Laboratories, Calgary, Alberta, Canada
| | - Yasufumi Matsumura
- Kyoto University Graduate School of Medicine, Pretoria, Gauteng, South Africa
| | | | - Liang Chen
- Meridian Health Center for Discovery and Innovation, Kyoto, Japan
- Hackensack Meridian School of Medicine at Seton Hall University, Nutley, New Jersey, USA
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3
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Draft Genome Sequences of 14 Fluoroquinolone-Resistant Escherichia coli Isolates from Imported Shrimp. Microbiol Resour Announc 2023; 12:e0111622. [PMID: 36856408 PMCID: PMC10112127 DOI: 10.1128/mra.01116-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023] Open
Abstract
We report the draft genome sequences of 14 fluoroquinolone-resistant Escherichia coli strains that were isolated from imported shrimp. All isolates contained multiple point mutations in the quinolone resistance-determining regions (QRDRs) and non-QRDRs of gyrA, parC, and parE genes. The data improve the understanding of fluoroquinolone resistance and indicate resistance mechanisms.
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4
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Hormesis: wound healing and fibroblasts. Pharmacol Res 2022; 184:106449. [PMID: 36113746 DOI: 10.1016/j.phrs.2022.106449] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/09/2022] [Accepted: 09/10/2022] [Indexed: 11/23/2022]
Abstract
Hormetic dose responses are reported here to occur commonly in the dermal wound healing process, with the particular focus on cell viability, proliferation, migration and collagen deposition of human and murine fibroblasts with in vitro studies. Hormetic responses were induced by a wide range of substances, including endogenous agents, pharmaceutical preparations, plant-derived extracts including many well-known dietary supplements, as well as physical stressor agents such as low-level laser treatments. Detailed mechanistic studies have identified common signaling pathways and their cross-pathway communications that mediate the hormetic dose responses. These findings complement and extend a similar comprehensive assessment concerning the occurrence of hormetic dose responses in keratinocytes. These findings demonstrate the generality of the hormetic dose response for key wound healing endpoints, suggesting that the hormesis concept has a fundamental role in wound healing, with respect to guiding strategies for experimental evaluation as well as therapeutic applications.
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5
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Ohadian Moghadam S, Nowroozi A, Momeni SA, Nowroozi MR, Heidarzadeh S, Poorabhari A. Antimicrobial resistance profiles for bacteria isolated from rectal swabs in patients candidate for prostate biopsy. JOURNAL OF CLINICAL UROLOGY 2022. [DOI: 10.1177/20514158221097557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objective: Infection is one of the common complications of post-prostate biopsy. Therefore, prophylaxis with fluoroquinolones and/or cephalosporins is recommended. We aimed to evaluate the prevalence of antibiotic-resistant bacteria isolated from rectal swabs in candidates for transrectal ultrasound-guided (TRUS) biopsy. The possible patient’s related risk factors attributing to resistance to antibiotics were also assessed. Methods: This cross-sectional study was performed on 126 male patients who were candidates for TRUS biopsy. Rectal swabs were collected and the samples were transferred to the laboratory in Amies transport medium during 2 hours and cultured on MacConkey agar with ciprofloxacin 1 mg/L and ciprofloxacin-resistant strains were identified. Kirby-Bauer disc diffusion method was used to determine the antibiotic susceptibility of the isolates. Results: In total, 59 bacterial isolates were obtained, which were Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa, respectively, in terms of frequency. They showed the lowest resistance to levofloxacin. Smoking was associated with positive culture results. Age was a factor with a significant effect on carrying ciprofloxacin-resistant strains. Conclusion: Ciprofloxacin resistance was high in almost all strains, but post-biopsy infectious complications were very low. Level of evidence: Not applicable
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Affiliation(s)
| | - Ali Nowroozi
- Uro-Oncology Research Center, Tehran University of Medical Sciences, Iran
- School of Medicine, Tehran University of Medical Sciences, Iran
| | - Seyed Ali Momeni
- Uro-Oncology Research Center, Tehran University of Medical Sciences, Iran
| | | | - Siamak Heidarzadeh
- Department of Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Iran
| | - Ashkan Poorabhari
- Uro-Oncology Research Center, Tehran University of Medical Sciences, Iran
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6
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Praski Alzrigat L, Huseby DL, Brandis G, Hughes D. Resistance/fitness trade-off is a barrier to the evolution of MarR inactivation mutants in Escherichia coli. J Antimicrob Chemother 2021; 76:77-83. [PMID: 33089314 PMCID: PMC7729382 DOI: 10.1093/jac/dkaa417] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 09/09/2020] [Indexed: 12/23/2022] Open
Abstract
Background Mutations that inactivate MarR reduce susceptibility to ciprofloxacin and competitive growth fitness in Escherichia coli. Both phenotypes are caused by overexpression of the MarA regulon, which includes the AcrAB-TolC drug efflux pump. Objectives We asked whether compensatory evolution could reduce the fitness cost of MarR-inactivating mutations without affecting resistance to ciprofloxacin. Methods The cost of overexpressing the AcrAB-TolC efflux pump was measured independently of MarA overexpression. Experimental evolution of MarR-inactive strains was used to select mutants with increased fitness. The acquired mutations were identified and their effects on drug susceptibility were measured. Results Overexpression of the AcrAB-TolC efflux pump was found not to contribute to the fitness cost of MarA regulon overexpression. Fitness-compensatory mutations were selected in marA and lon. The mutations reduced the level of MarA protein thus reducing expression of the MarA regulon. They restored growth fitness but also reduced resistance to ciprofloxacin. Conclusions The fitness cost caused by overexpression of the MarA regulon has multiple contributing factors. Experimental evolution did not identify any single pump-independent cost factor. Instead, efficient fitness compensation occurred only by mechanisms that reduce MarA concentration, which simultaneously reduce the drug resistance phenotype. This resistance/fitness trade-off is a barrier to the successful spread of MarR inactivation mutations in clinical isolates where growth fitness is essential.
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Affiliation(s)
- Lisa Praski Alzrigat
- Department of Medical Biochemistry and Microbiology, Box 582 Biomedical Center, Uppsala University, Sweden
| | - Douglas L Huseby
- Department of Medical Biochemistry and Microbiology, Box 582 Biomedical Center, Uppsala University, Sweden
| | - Gerrit Brandis
- Department of Medical Biochemistry and Microbiology, Box 582 Biomedical Center, Uppsala University, Sweden
| | - Diarmaid Hughes
- Department of Medical Biochemistry and Microbiology, Box 582 Biomedical Center, Uppsala University, Sweden
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7
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Brandis G, Gockel J, Garoff L, Guy L, Hughes D. Expression of the qepA1 gene is induced under antibiotic exposure. J Antimicrob Chemother 2021; 76:1433-1440. [PMID: 33608713 PMCID: PMC8120332 DOI: 10.1093/jac/dkab045] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/28/2021] [Indexed: 11/13/2022] Open
Abstract
Background The qepA1 gene encodes an efflux pump that reduces susceptibility to ciprofloxacin. Little is known about the regulation of qepA1 expression. Objectives To assess the potential role of ciprofloxacin and other antibiotics in the regulation of qepA1 gene expression. To identify the promoter that drives qepA1 expression and other factors involved in expression regulation. To assess whether the identified features are universal among qepA alleles. Methods A translational qepA1-yfp fusion under the control of the qepA1 upstream region was cloned into the Escherichia coli chromosome. Expression of the fusion protein was measured in the presence of various antibiotics. Deletions within the upstream region were introduced to identify regions involved in gene expression and regulation. The qepA1 coding sequence and upstream region were compared with all available qepA sequences. Results Cellular stress caused by the presence of various antibiotics can induce qepA1 expression. The qepA1 gene is fused to a class I integron and gene expression is driven by the Pc promoter within the integrase gene. A segment within the integron belonging to a truncated dfrB4 gene is essential for the regulation of qepA1 expression. This genetic context is universal among all sequenced qepA alleles. Conclusions The fusion of the qepA1 gene to a class I integron has created a novel regulatory unit that enables qepA1 expression to be under the control of antibiotic exposure. This setup mitigates potential negative effects of QepA1 production on bacterial fitness by restricting high-level expression to environmental conditions in which QepA1 is beneficial.
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Affiliation(s)
- Gerrit Brandis
- Department of Medical Biochemistry and Microbiology, Biomedical Center, Uppsala University, Box 582, Uppsala, Sweden
| | - Jonas Gockel
- Department of Medical Biochemistry and Microbiology, Biomedical Center, Uppsala University, Box 582, Uppsala, Sweden
| | - Linnéa Garoff
- Department of Medical Biochemistry and Microbiology, Biomedical Center, Uppsala University, Box 582, Uppsala, Sweden
| | - Lionel Guy
- Department of Medical Biochemistry and Microbiology, Biomedical Center, Uppsala University, Box 582, Uppsala, Sweden
| | - Diarmaid Hughes
- Department of Medical Biochemistry and Microbiology, Biomedical Center, Uppsala University, Box 582, Uppsala, Sweden
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8
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Han J, Kiss L, Mei H, Remete AM, Ponikvar-Svet M, Sedgwick DM, Roman R, Fustero S, Moriwaki H, Soloshonok VA. Chemical Aspects of Human and Environmental Overload with Fluorine. Chem Rev 2021; 121:4678-4742. [PMID: 33723999 PMCID: PMC8945431 DOI: 10.1021/acs.chemrev.0c01263] [Citation(s) in RCA: 131] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Indexed: 12/24/2022]
Abstract
Over the last 100-120 years, due to the ever-increasing importance of fluorine-containing compounds in modern technology and daily life, the explosive development of the fluorochemical industry led to an enormous increase of emission of fluoride ions into the biosphere. This made it more and more important to understand the biological activities, metabolism, degradation, and possible environmental hazards of such substances. This comprehensive and critical review focuses on the effects of fluoride ions and organofluorine compounds (mainly pharmaceuticals and agrochemicals) on human health and the environment. To give a better overview, various connected topics are also discussed: reasons and trends of the advance of fluorine-containing pharmaceuticals and agrochemicals, metabolism of fluorinated drugs, withdrawn fluorinated drugs, natural sources of organic and inorganic fluorine compounds in the environment (including the biosphere), sources of fluoride intake, and finally biomarkers of fluoride exposure.
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Affiliation(s)
- Jianlin Han
- Jiangsu
Co-Innovation Center of Efficient Processing and Utilization of Forest
Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Loránd Kiss
- University
of Szeged, Institute of Pharmaceutical Chemistry
and Interdisciplinary Excellence Centre, Eötvös u. 6, 6720 Szeged, Hungary
| | - Haibo Mei
- Jiangsu
Co-Innovation Center of Efficient Processing and Utilization of Forest
Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Attila Márió Remete
- University
of Szeged, Institute of Pharmaceutical Chemistry
and Interdisciplinary Excellence Centre, Eötvös u. 6, 6720 Szeged, Hungary
| | - Maja Ponikvar-Svet
- Department
of Inorganic Chemistry and Technology, Jožef
Stefan Institute, Jamova
cesta 39, 1000 Ljubljana, Slovenia
| | - Daniel Mark Sedgwick
- Departamento
de Química Orgánica, Universidad
de Valencia, 46100 Burjassot, Valencia Spain
| | - Raquel Roman
- Departamento
de Química Orgánica, Universidad
de Valencia, 46100 Burjassot, Valencia Spain
| | - Santos Fustero
- Departamento
de Química Orgánica, Universidad
de Valencia, 46100 Burjassot, Valencia Spain
| | - Hiroki Moriwaki
- Hamari
Chemicals Ltd., 1-19-40, Nankokita, Suminoe-ku, Osaka 559-0034, Japan
| | - Vadim A. Soloshonok
- Department
of Organic Chemistry I, Faculty of Chemistry, University of the Basque Country UPV/EHU, 20018 San Sebastian, Spain
- IKERBASQUE,
Basque Foundation for Science, 48011 Bilbao, Spain
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9
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Fluoroquinolone Antibiotics Exhibit Low Antiviral Activity against SARS-CoV-2 and MERS-CoV. Viruses 2020; 13:v13010008. [PMID: 33374514 DOI: 10.3390/v13010008] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/17/2020] [Accepted: 12/21/2020] [Indexed: 02/07/2023] Open
Abstract
Repurposing FDA-approved drugs that treat respiratory infections caused by coronaviruses, such as SARS-CoV-2 and MERS-CoV, could quickly provide much needed antiviral therapies. In the current study, the potency and cellular toxicity of four fluoroquinolones (enoxacin, ciprofloxacin, levofloxacin, and moxifloxacin) were assessed in Vero cells and A549 cells engineered to overexpress ACE2, the SARS-CoV-2 entry receptor. All four fluoroquinolones suppressed SARS-CoV-2 replication at high micromolar concentrations in both cell types, with enoxacin demonstrating the lowest effective concentration 50 value (EC50) of 126.4 μM in Vero cells. Enoxacin also suppressed the replication of MERS-CoV-2 in Vero cells at high micromolar concentrations. Cellular toxicity of levofloxacin was not found in either cell type. In Vero cells, minimal toxicity was observed following treatment with ≥37.5 μM enoxacin and 600 μM ciprofloxacin. Toxicity in both cell types was detected after moxifloxacin treatment of ≥300 μM. In summary, these results suggest that the ability of fluoroquinolones to suppress SARS-CoV-2 and MERS-CoV replication in cultured cells is limited.
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10
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Assar S, Nosratabadi R, Khorramdel Azad H, Masoumi J, Mohamadi M, Hassanshahi G. A Review of Immunomodulatory Effects of Fluoroquinolones. Immunol Invest 2020; 50:1007-1026. [PMID: 32746743 DOI: 10.1080/08820139.2020.1797778] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Past researches indicate that some types of antibiotics, apart from their antimicrobial effects, have some other important effects which indirectly are exerted by modulating and regulating the immune system's mediators. Among the compounds with antimicrobial effects, fluoroquinolones (FQs) are known as synthetic antibiotics, which exhibit the property of decomposing of DNA and prevent bacterial growth by inactivating the enzymes involved in DNA twisting, including topoisomerase II (DNA gyrase) and IV. Interestingly, immune responses are indirectly modulated by FQs through suppressing pro-inflammatory cytokines, such as interleukin 1 (IL-1), IL-6, tumor necrosis factor-alpha (TNF-α), and super-inducing IL-2, which tend to increase both the growth and activity of T and B lymphocytes. In addition, they affect the development of immune responses by influencing of expression of other cytokines and mediators. This study aims to review past research on the immunomodulatory effects of FQs on the expression of cytokines, especially IL-2 and to discuss controversial investigations.
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Affiliation(s)
- Shokrollah Assar
- Immunology of Infectious Diseases Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.,Department of Microbiology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Reza Nosratabadi
- Department of Immunology, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Hossein Khorramdel Azad
- Molecular Medicine Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.,Department of Immunology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Javad Masoumi
- Department of Immunology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Mahshad Mohamadi
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Gholamhossein Hassanshahi
- Molecular Medicine Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.,Department of Immunology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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11
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Rheumatologic Manifestations of CF. Respir Med 2020. [DOI: 10.1007/978-3-030-42382-7_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Gutti G, Arya K, Singh SK. Latent Tuberculosis Infection (LTBI) and Its Potential Targets: An Investigation into Dormant Phase Pathogens. Mini Rev Med Chem 2019; 19:1627-1642. [PMID: 31241015 DOI: 10.2174/1389557519666190625165512] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 02/06/2018] [Accepted: 05/28/2018] [Indexed: 11/22/2022]
Abstract
One-third of the world's population harbours the latent tuberculosis infection (LTBI) with a lifetime risk of reactivation. Although, the treatment of LTBI relies significantly on the first-line therapy, identification of novel drug targets and therapies are the emerging focus for researchers across the globe. The current review provides an insight into the infection, diagnostic methods and epigrammatic explanations of potential molecular targets of dormant phase bacilli. This study also includes current preclinical and clinical aspects of tubercular infections and new approaches in antitubercular drug discovery.
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Affiliation(s)
- Gopichand Gutti
- Pharmaceutical Chemistry Research Laboratory, Department of Pharmaceutical Engineering & Technology, Indian Institute of Technology (B.H.U.) Varanasi-221005 (U.P.), India
| | - Karan Arya
- Pharmaceutical Chemistry Research Laboratory, Department of Pharmaceutical Engineering & Technology, Indian Institute of Technology (B.H.U.) Varanasi-221005 (U.P.), India
| | - Sushil Kumar Singh
- Pharmaceutical Chemistry Research Laboratory, Department of Pharmaceutical Engineering & Technology, Indian Institute of Technology (B.H.U.) Varanasi-221005 (U.P.), India
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13
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Yi H, Yan Z, Wang L, Zhou X, Yan R, Zhang D, Shen G, Zhou S. Fluorometric determination for ofloxacin by using an aptamer and SYBR Green I. Mikrochim Acta 2019; 186:668. [DOI: 10.1007/s00604-019-3788-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 08/27/2019] [Indexed: 12/14/2022]
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14
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Sati HF, Bruinsma N, Galas M, Hsieh J, Sanhueza A, Ramon Pardo P, Espinal MA. Characterizing Shigella species distribution and antimicrobial susceptibility to ciprofloxacin and nalidixic acid in Latin America between 2000-2015. PLoS One 2019; 14:e0220445. [PMID: 31374081 PMCID: PMC6677304 DOI: 10.1371/journal.pone.0220445] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 07/16/2019] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Shigellosis is the second leading cause of diarrheal death globally. The global burden has been complicated by the emergence of Shigella strains resistant to first line antibiotic treatments such as ciprofloxacin. This study aims to describe the epidemiologic distribution of the most common Shigella species, and their antimicrobial susceptibility patterns to ciprofloxacin and nalidixic acid (NA) in Latin America. METHODS Laboratory data from 19 countries were obtained through the Latin American Network for Antimicrobial Resistance Surveillance (ReLAVRA) from 2000-2015. The Clinical Laboratory Standards Institute reduced susceptibility breakpoints for Enterobacteriaceae was used to interpret the disc diffusion tests for Shigella susceptibility to ciprofloxacin and NA. Negative binominal regression was used to analyze longitudinal trends of Shigella isolates antimicrobial susceptibility. RESULTS 79,548 Shigella isolates were tested and reported between 2000-2015. The most common isolated species were S. flexneri (49%), and S. sonnei (28%). There was a steady increase in the proportion of S. sonnei isolates within the region(p<0.001). The average annual percentage increase (AAPI) in nonsusceptibility was 18.4% (p<0.001) for ciprofloxacin (baseline = 0.3); and 13.2%(p<0.001) for NA (baseline = 3). AAPI nonsusceptibility to ciprofloxacin was 13.3% for S. flexneri (p<0.04); and 39.9% for S. sonnei (p<0.001). Honduras, Dominican Republic, Venezuela, and Chile reported the highest increase in nonsusceptibility to ciprofloxacin among all Shigella isolates. CONCLUSION There is an increasing trend in Shigella nonsusceptibility to ciprofloxacin and NA, including among the most common shigella species, in Latin America. This rise of nonsusceptibility among Shigella species to commonly used treatments such as ciprofloxacin is alarming and threatens the control and management of this currently treatable infection. Improved data quality, collection and reporting is needed in Latin America to respond effectively to the rising trends observed. This includes the need for quality isolate level epidemiological data; molecular data, and data on antibiotic consumption and use.
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Affiliation(s)
- Hatim F. Sati
- Antimicrobial Resistance Special Program, Communicable Diseases and Environmental Determinants of Health, Pan American Health Organization, Washington, DC, United States of America
- * E-mail:
| | - Nienke Bruinsma
- Antimicrobial Resistance Special Program, Communicable Diseases and Environmental Determinants of Health, Pan American Health Organization, Washington, DC, United States of America
| | - Marcelo Galas
- Antimicrobial Resistance Special Program, Communicable Diseases and Environmental Determinants of Health, Pan American Health Organization, Washington, DC, United States of America
| | - Jenny Hsieh
- Antimicrobial Resistance Special Program, Communicable Diseases and Environmental Determinants of Health, Pan American Health Organization, Washington, DC, United States of America
| | - Antonio Sanhueza
- Health Analyses Metrics and Evidence (EIH/HA), Evidence and Intelligence for Action in Health (EIH), Pan American Health Organization, Washington, DC, United States of America
| | - Pilar Ramon Pardo
- Antimicrobial Resistance Special Program, Communicable Diseases and Environmental Determinants of Health, Pan American Health Organization, Washington, DC, United States of America
| | - Marcos A. Espinal
- Antimicrobial Resistance Special Program, Communicable Diseases and Environmental Determinants of Health, Pan American Health Organization, Washington, DC, United States of America
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15
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Bisaccia DR, Aicale R, Tarantino D, Peretti GM, Maffulli N. Biological and chemical changes in fluoroquinolone-associated tendinopathies: a systematic review. Br Med Bull 2019; 130:39-49. [PMID: 30811525 DOI: 10.1093/bmb/ldz006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 01/04/2019] [Accepted: 02/10/2019] [Indexed: 12/29/2022]
Abstract
INTRODUCTION The present systematic review investigates the biological and chemical mechanisms that affect the health and structure of tendons following the use of fluoroquinolones (FQs). SOURCES OF DATA A total of 12 articles were included, organized, and reported following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. AREAS OF AGREEMENT Five mechanisms were identified: arrest of proliferation through a decreased activity of cyclin B, CDK-1, CHK-1, and increased PK-1; decrease tenocytes migration through decreased phosphorylation of FAK; decrease type I collagen metabolism through increased MMP-2; chelate effect on ions that influence epigenetics and several enzymes; fluoroquinolones-induced ROS (radical oxygen species) production in mitochondria. AREAS OF CONTROVERSY There is no definite structure-damage relationship. The dose-effect relationship is unclear. GROWING POINTS Knowing and defining the damage exerted by FQs plays a role in clinical practice, replacing FQs with other antibacterial drugs or using antioxidants to attenuate their pathological effects. AREAS TIMELY FOR DEVELOPING RESEARCH Clinical and basic sciences studies for each FQs are necessary.
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Affiliation(s)
- Domenico Rocco Bisaccia
- Department of Pharmacology, School of Medicine and Surgery, University of Salerno, Salerno, Italy
| | - Rocco Aicale
- Department of Musculoskeletal Disorders, School of Medicine and Surgery, University of Salerno, Salerno, Italy
| | - Domiziano Tarantino
- Department of Musculoskeletal Disorders, School of Medicine and Surgery, University of Salerno, Salerno, Italy
| | - Giuseppe M Peretti
- IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
| | - Nicola Maffulli
- Department of Musculoskeletal Disorders, School of Medicine and Surgery, University of Salerno, Salerno, Italy
- Queen Mary University of London, Barts and the London School of Medicine and Dentistry, Centre for Sports and Exercise Medicine, Mile End Hospital, 275 Bancroft Road, London, England
- Institute of Science and Technology in Medicine, Keele University School of Medicine, Thornburrow Drive, Stoke on Trent, England
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16
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Zhou M, Zhang S, Wang L, Zhang B. Ultrafast photoinduced charge transfer character in ofloxacin singlet decay. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.08.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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17
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Matsubara A, Oda S, Akai S, Tsuneyama K, Yokoi T. Establishment of a drug-induced rhabdomyolysis mouse model by co-administration of ciprofloxacin and atorvastatin. Toxicol Lett 2018; 291:184-193. [PMID: 29679711 DOI: 10.1016/j.toxlet.2018.04.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 04/12/2018] [Accepted: 04/14/2018] [Indexed: 12/13/2022]
Abstract
Rhabdomyolysis is one of the serious side effects of ciprofloxacin (CPFX), a widely used antibacterial drug; and occasionally, acute kidney injury (AKI) occurs. Often, rhabdomyolysis has occurred in patients taking CPFX co-administered with statins. The purpose of this study is to establish a mouse model of drug-induced rhabdomyolysis by co-administration of CPFX and atorvastatin (ATV) and to clarify the mechanisms of its pathogenesis. C57BL/6J mice treated with L-buthionine-(S,R)-sulfoximine (BSO), a glutathione synthesis inhibitor, were orally administered with CPFX and ATV for 4 days. Plasma levels of creatinine phosphokinase (CPK) and aspartate aminotransferase (AST) were significantly increased in the CPFX and ATV-co-administered group. Histopathological examination of skeletal muscle observed degeneration in gastrocnemius muscle and an increased number of the satellite cells. Expressions of skeletal muscle-specific microRNA and mRNA in plasma and skeletal muscle, respectively, were significantly increased. The area under the curve (AUC) of plasma CPFX was significantly increased in the CPFX and ATV-co-administered group. Furthermore, cytoplasmic vacuolization and a positively myoglobin-stained region in kidney tissue and high content of myoglobin in urine were observed. These results indicated that AKI was induced by myoglobin that leaked from skeletal muscle. The established mouse model in the present study would be useful for predicting potential rhabdomyolysis risks in preclinical drug development.
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Affiliation(s)
- Akiko Matsubara
- Department of Drug Safety Sciences, Division of Clinical Pharmacology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Shingo Oda
- Department of Drug Safety Sciences, Division of Clinical Pharmacology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Sho Akai
- Department of Drug Safety Sciences, Division of Clinical Pharmacology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
| | - Koichi Tsuneyama
- Department of Pathology and Laboratory Medicine, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-5 Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Tsuyoshi Yokoi
- Department of Drug Safety Sciences, Division of Clinical Pharmacology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan.
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18
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Kumar S, Kumar G, Tripathi AK, Seena S, Koh J. Enhanced fluorescence norfloxacin substituted naphthalimide derivatives: Molecular docking and antibacterial activity. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.12.067] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Xiao C, Han Y, Liu Y, Zhang J, Hu C. Relationship Between Fluoroquinolone Structure and Neurotoxicity Revealed by Zebrafish Neurobehavior. Chem Res Toxicol 2018; 31:238-250. [PMID: 29561132 DOI: 10.1021/acs.chemrestox.7b00300] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Central nervous system side effects are one of the most frequently reported adverse reactions of fluoroquinolones (FQs). However, the mechanism is not fully understood. In this study, zebrafish ( Danio rerio) were used as a model system. We quantified neurobehavior by recording indicators with automated video-tracking and used liquid chromatography-tandem mass spectrometry to detect drug absorption in vivo. We studied embryotoxicity and effects on zebrafish locomotor activity of 17 typical FQs. In addition, we calculated the stable conformation of typical FQs in aqueous conditions. The relationships between structure, neurotoxicity, and embryotoxicity were analyzed. The results indicate: (1) The effects of FQs on zebrafish neurobehavior can be divided into four categories. Type I has no significant influence on locomotor activity. Type II suppresses locomotor activity. Type III inhibits at low concentration and stimulates at high concentration. Type IV stimulates and then suppresses (biphasic response). (2) Structural modifications of FQs can change toxicity properties in zebrafish. Cleavage of the C-7 piperazinyl structure decreases neurotoxicity but enhances embryotoxicity. The C-3 decarboxyl formation and 5-NH2 derivatives might enhance embryotoxicity and neurotoxicity. (3) There are two toxic functional groups. The piperazinyl structure at position C-7 (toxic functional group I) can cause primary reactions which may be by the inhibition of γ-aminobutyric acid receptors, and the nucleus containing a carboxyl group at position 3 (toxic functional group II) might cause a reaction secondary to the effect of toxic functional group I and reverse its effects.
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Affiliation(s)
- Chaoqiang Xiao
- Chinese Academy of Medical Sciences and Peking Union Medical College , 100730 Beijing , China.,National Institutes for Food and Drug Control , 100050 Beijing , China
| | - Ying Han
- National Institutes for Food and Drug Control , 100050 Beijing , China
| | - Ying Liu
- National Institutes for Food and Drug Control , 100050 Beijing , China
| | - Jingpu Zhang
- Chinese Academy of Medical Sciences and Peking Union Medical College , 100730 Beijing , China
| | - Changqin Hu
- Chinese Academy of Medical Sciences and Peking Union Medical College , 100730 Beijing , China.,National Institutes for Food and Drug Control , 100050 Beijing , China
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20
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Ubiquitous Nature of Fluoroquinolones: The Oscillation between Antibacterial and Anticancer Activities. Antibiotics (Basel) 2017; 6:antibiotics6040026. [PMID: 29112154 PMCID: PMC5745469 DOI: 10.3390/antibiotics6040026] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 10/26/2017] [Accepted: 11/03/2017] [Indexed: 12/15/2022] Open
Abstract
Fluoroquinolones are synthetic antibacterial agents that stabilize the ternary complex of prokaryotic topoisomerase II enzymes (gyrase and Topo IV), leading to extensive DNA fragmentation and bacteria death. Despite the similar structural folds within the critical regions of prokaryotic and eukaryotic topoisomerases, clinically relevant fluoroquinolones display a remarkable selectivity for prokaryotic topoisomerase II, with excellent safety records in humans. Typical agents that target human topoisomerases (such as etoposide, doxorubicin and mitoxantrone) are associated with significant toxicities and secondary malignancies, whereas clinically relevant fluoroquinolones are not known to exhibit such propensities. Although many fluoroquinolones have been shown to display topoisomerase-independent antiproliferative effects against various human cancer cells, those that are significantly active against eukaryotic topoisomerase show the same DNA damaging properties as other topoisomerase poisons. Empirical models also show that fluoroquinolones mediate some unique immunomodulatory activities of suppressing pro-inflammatory cytokines and super-inducing interleukin-2. This article reviews the extended roles of fluoroquinolones and their prospects as lead for the unmet needs of "small and safe" multimodal-targeting drug scaffolds.
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21
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Wu B, Zhang L, Liu Z, He H, Pan A, Wang F, Zhang M, Chen B, Lu Z, Chen S, Wang X. Drug-resistant tuberculosis in Zhejiang Province, China: an updated analysis of time trends, 1999-2013. Glob Health Action 2017; 10:1293925. [PMID: 28578621 PMCID: PMC5496046 DOI: 10.1080/16549716.2017.1293925] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 01/29/2017] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Multidrug-resistant tuberculosis (MDR-TB) and extensively drug-resistant tuberculosis (XDR-TB) hinder the progress of TB control. OBJECTIVE To track the trend of drug-resistant tuberculosis (DR-TB) prevalence in Zhejiang Province from 1999 to 2013, and identify risk factors of resistance to second-line drugs among MDR-TB patients. DESIGN Four DR-TB surveys had been done in Zhejiang Province in 1999, 2004, 2008 and 2013 through questionnaires, in which demographic and epidemiological items were included. After questionnaires, drug susceptibility testing (DST) targeted at four first-line drugs was done for all TB patients and DST targeted at six second-line drugs (only in 2008 and 2013) for MDR-TB patients. The drug resistance trend over time was analyzed using the Cochran-Armitage test. The factors associated with resistance to second-line drugs among MDR-TB patients were examined by a multivariate logistic regression model. RESULTS Of 936 patients enrolled, 27 (3.21%) and 20 (21.28%) MDR-TB cases were registered as new and previously treated cases, respectively. MDR-TB showed a decreasing trend (Z = -3.31, p < 0.01) while resistance to any first-line drugs showed an increasing trend (Z = 5.22, p < 0.001), from 1999 to 2013. The highest resistance rate was shown to ofloxacin among MDR-TB patients both in 2008 (28.8%) and in 2013 (27.7%), while resistance to para-aminosalicylate decreased significantly (Z = -2.06, p = 0.04) between 2008 and 2013. MDR-TB patients aged 45-65 years (OR = 5.00, p = 0.02) were more likely to be resistant to any second-line drugs. CONCLUSIONS DR-TB including MDR-TB remains a major public health problem in Zhejiang Province. Further efforts on MDR-TB control should be conducted to hinder drug resistance, including critical clinical use of anti-TB antibiotics and preventing transmission.
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Affiliation(s)
- Beibei Wu
- Department of Tuberculosis Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, P. R. China
| | - Le Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, P. R. China
| | - Zhengwei Liu
- Department of Tuberculosis Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, P. R. China
| | - Haibo He
- Department of Tuberculosis Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, P. R. China
| | - Aizhen Pan
- Department of Tuberculosis Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, P. R. China
| | - Fei Wang
- Department of Tuberculosis Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, P. R. China
| | - Mingwu Zhang
- Department of Tuberculosis Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, P. R. China
| | - Bin Chen
- Department of Tuberculosis Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, P. R. China
| | - Zuhong Lu
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, P. R. China
| | - Songhua Chen
- Department of Tuberculosis Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, P. R. China
| | - Xiaomeng Wang
- Department of Tuberculosis Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, P. R. China
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22
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Bacterial fatty acid metabolism in modern antibiotic discovery. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1862:1300-1309. [PMID: 27668701 DOI: 10.1016/j.bbalip.2016.09.014] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/12/2016] [Accepted: 09/19/2016] [Indexed: 12/28/2022]
Abstract
Bacterial fatty acid synthesis is essential for many pathogens and different from the mammalian counterpart. These features make bacterial fatty acid synthesis a desirable target for antibiotic discovery. The structural divergence of the conserved enzymes and the presence of different isozymes catalyzing the same reactions in the pathway make bacterial fatty acid synthesis a narrow spectrum target rather than the traditional broad spectrum target. Furthermore, bacterial fatty acid synthesis inhibitors are single-targeting, rather than multi-targeting like traditional monotherapeutic, broad-spectrum antibiotics. The single-targeting nature of bacterial fatty acid synthesis inhibitors makes overcoming fast-developing, target-based resistance a necessary consideration for antibiotic development. Target-based resistance can be overcome through multi-targeting inhibitors, a cocktail of single-targeting inhibitors, or by making the single targeting inhibitor sufficiently high affinity through a pathogen selective approach such that target-based mutants are still susceptible to therapeutic concentrations of drug. Many of the pathogens requiring new antibiotic treatment options encode for essential bacterial fatty acid synthesis enzymes. This review will evaluate the most promising targets in bacterial fatty acid metabolism for antibiotic therapeutics development and review the potential and challenges in advancing each of these targets to the clinic and circumventing target-based resistance. This article is part of a Special Issue entitled: Bacterial Lipids edited by Russell E. Bishop.
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23
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Shirsat S, Kadam A, Mane RS, Jadhav VV, Zate MK, Naushad M, Kim KH. Protective role of biogenic selenium nanoparticles in immunological and oxidative stress generated by enrofloxacin in broiler chicken. Dalton Trans 2016; 45:8845-53. [PMID: 27147084 DOI: 10.1039/c6dt00120c] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Presently most bacteria are becoming antibiotic resistant. Due to this there is a deficiency of potent antibiotics, therefore we have to preserve and improve the efficiency of existing antibiotics by mitigating the side effects. Enrofloxacin (EFX) is an important antimicrobial used in veterinary practice but it is known to exert immune suppression antioxidant stress. In the present study, we report on: (a) the biosynthesis of selenium nanoparticles (Se NPs), and (b) their protective effect in reducing adverse effects of EFX on broiler chicken. A potent bacterial strain, isolated from farm soil, has been identified as Pantoea agglomerans (GenBank: KU500622). It tolerates a high concentration of selenium dioxide (9 mM) and produces Se NPs under aerobic conditions. The obtained Se NPs are amorphous in structure and spherical in shape with sizes of less than 100 nm. The activity of cellular, humoral immune response and enzymatic and non-enzymatic antioxidants, has significantly been decreased as a result of EFX treatment. We investigated that Se NP supplementation greatly restores these values towards the control, and to even higher than those of the control. Adverse effects of EFX are prevented by simultaneous exposure to Se NPs (0.6 mg per kg of feed) in the diet of poultry chicken.
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Affiliation(s)
- Shubhangi Shirsat
- Department of Biotechnology, New Model Degree College, Hingoli, M.S., India.
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24
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Stockmann C, Roberts JK, Yellepeddi VK, Sherwin CMT. Clinical pharmacokinetics of inhaled antimicrobials. Clin Pharmacokinet 2016; 54:473-92. [PMID: 25735634 DOI: 10.1007/s40262-015-0250-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Administration of inhaled antimicrobials affords the ability to achieve targeted drug delivery into the respiratory tract, rapid entry into the systemic circulation, high bioavailability and minimal metabolism. These unique pharmacokinetic characteristics make inhaled antimicrobial delivery attractive for the treatment of many pulmonary diseases. This review examines recent pharmacokinetic trials with inhaled antibacterials, antivirals and antifungals, with an emphasis on the clinical implications of these studies. The majority of these studies revealed evidence of high antimicrobial concentrations in the airway with limited systemic exposure, thereby reducing the risk of toxicity. Sputum pharmacokinetics varied widely, which makes it challenging to interpret the result of sputum pharmacokinetic studies. Many no vel inhaled antimicrobial therapies are currently under investigation that will require detailed pharmacokinetic studies, including combination inhaled antimicrobial therapies, inhaled nanoparticle formulations of several antibacterials, inhaled non-antimicrobial adjuvants, inhaled antiviral recombinant protein therapies and semi-synthetic inhaled antifungal agents. Additionally, the development of new inhaled delivery devices, particularly for mechanically ventilated patients, will result in a pressing need for additional pharmacokinetic studies to identify optimal dosing regimens.
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Affiliation(s)
- Chris Stockmann
- Division of Clinical Pharmacology, Department of Paediatrics, University of Utah School of Medicine, 295 Chipeta Way, Salt Lake City, UT, 84108, USA
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25
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Cheng VCC, Chen JHK, So SYC, Wong SCY, Yan MK, Chau PH, Lee WM, To KKW, Chan JFW, Hung IFN, Ho PL, Yuen KY. Use of fluoroquinolones is the single most important risk factor for the high bacterial load in patients with nasal and gastrointestinal colonization by multidrug-resistant Acinetobacter baumannii. Eur J Clin Microbiol Infect Dis 2015; 34:2359-66. [PMID: 26373714 DOI: 10.1007/s10096-015-2489-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 09/03/2015] [Indexed: 10/23/2022]
Abstract
Gastrointestinal colonization by carbapenem-resistant Acinetobacter baumannii (CRAB) and multidrug-resistant Acinetobacter baumannii (MRAB) provides an important reservoir for clinical infections and hospital outbreaks. We conducted a 7-month study in a 3200-bed healthcare network to investigate the prevalence of gastrointestinal colonization of CRAB and MRAB in Hong Kong. Between 1 June and 31 December 2014, a total of 17,760 fecal specimens from 9469 patients were screened. Testing showed that 340 (1.9%) specimens from 224 (2.6%) patients were CRAB-positive, which included 70 (0.39%) MRAB-positive specimens from 54 (0.57%) patients. The presence of wound or ulcer, use of broad-spectrum antibiotics in the preceding 6 months, and residence in elderly homes are independent risk factors for gastrointestinal colonization of CRAB. Quantitative bacterial counts in various body sites (rectal, nasal, axilla, wound, catheterized urine, if available) were performed in 33 (61.1%) of 54 MRAB patients. Ten (30.3%) and 8 (24.2%) patients had high bacterial load (defined as over 3 log10) in rectal and nasal swabs, with a median of 5.04 log10 cfu/ml of rectal swab and 4.89 log10 cfu/ml of nasal swab in saline diluent, respectively. Nine (81.8%) of 11 patients with wounds had high bacterial load in wound swabs, with a median of 5.62 log10 cfu/ml. Use of fluoroquinolones 6 months before admission was the only significant factor associated with high bacterial load in nasal and rectal swabs. With the implementation of directly observed hand hygiene before meals and medications to all conscious hospitalized patients, no hospital outbreaks were observed during our study period.
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Affiliation(s)
- V C C Cheng
- Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China.,Infection Control Team, Queen Mary Hospital, Hong Kong Special Administrative Region, China
| | - J H K Chen
- Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China
| | - S Y C So
- Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China
| | - S C Y Wong
- Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China
| | - M K Yan
- Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China
| | - P H Chau
- School of Nursing, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - W M Lee
- Infection Control Team, Queen Mary Hospital, Hong Kong Special Administrative Region, China
| | - K K W To
- Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China
| | - J F W Chan
- Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China
| | - I F N Hung
- Department of Medicine, Queen Mary Hospital, Hong Kong Special Administrative Region, China
| | - P L Ho
- Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China
| | - K Y Yuen
- Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China.
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Garnayak S, Patel S. Oxidative degradation of norfloxacin by a lipophilic oxidant, cetyltrimethylammonium permanganate in water–acetonitrile medium: A kinetic and mechanistic study. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Khasawneh AF, Al-Hadidi KA, Aburjai TA, Obeidat FN. Acute and subacute (20-d) oral dose toxicity study of modified fluoroquinolone compound 6C in BALB/c mice. TOXIN REV 2015. [DOI: 10.3109/15569543.2015.1076483] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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28
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Kyriakopoulos AM, Dinda B. Cornus mas (Linnaeus) Novel Devised Medicinal Preparations: Bactericidal Effect against Staphylococcus aureus and Pseudomonas aeruginosa. Molecules 2015; 20:11202-18. [PMID: 26091077 PMCID: PMC6272430 DOI: 10.3390/molecules200611202] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 06/08/2015] [Accepted: 06/12/2015] [Indexed: 11/16/2022] Open
Abstract
The medicinal properties of Cornus mas L. (=Cornus mascula L.), Cornaceae, are well described in Hippocratian documents, and recent research provides experimental evidence for some of these properties. However, the chemical components of Cornus mas L. that may be of pharmaceutical importance are relatively unstable. In this respect a novel methodology for plant nutrient element extraction that provides favorable conditions for simultaneous stabilization of such fragile and unstable structures has been devised. Using this methodology, medicinal preparations derived from Cornus mas L. fresh fruits, proved to possess significant antimicrobial activity selective against S. aureus and P. aeruginosa. This effect became apparent with the addition of sodium bromide in the extraction procedure and varied with the ion availability during extraction. The identification of novel agents with potent antimicrobial activity against these species is of medical importance to overcome the problem of universal antibiotic resistance.
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Affiliation(s)
| | - Biswanath Dinda
- Department of Chemistry, Tripura University, Suryamaninagar 799 022 Tripura, India.
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29
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Nawaz M, Sung K, Kweon O, Khan S, Nawaz S, Steele R. Characterisation of novel mutations involved in quinolone resistance in Escherichia coli isolated from imported shrimp. Int J Antimicrob Agents 2015; 45:471-6. [DOI: 10.1016/j.ijantimicag.2014.11.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 11/13/2014] [Indexed: 10/24/2022]
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30
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Norrby SR. Norfloxacin: Targeted Antibiotic Therapy: Proceedings of a Workshop Held in Taormina, Sicily 11 April, 1986. ACTA ACUST UNITED AC 2015. [DOI: 10.3109/inf.1986.18.suppl-48.01] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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31
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Stockmann C, Hillyard B, Ampofo K, Spigarelli MG, Sherwin CMT. Levofloxacin inhalation solution for the treatment of chronic Pseudomonas aeruginosa infection among patients with cystic fibrosis. Expert Rev Respir Med 2014; 9:13-22. [PMID: 25417708 DOI: 10.1586/17476348.2015.986469] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Chronic pulmonary infections are common among patients with cystic fibrosis. By 10 years of age, Pseudomonas aeruginosa is the predominant pathogen. Inhaled levofloxacin solution (MP-376) is a promising new therapy that exhibits rapid antibacterial activity and excellent biofilm penetration against P. aeruginosa. In the largest trial to date, 151 patients were randomized to receive MP-376 or placebo. At the end of the 28-day treatment period, patients who received MP-376 had decreased P. aeruginosa density in sputum, improved lung function parameters and improved respiratory symptoms. MP-376 also appeared to be safe and well tolerated. The results of two recently completed Phase III trials have not yet been released; however, these data will be critical in determining whether MP-376 is a safe and effective maintenance therapy for chronic pulmonary P. aeruginosa infections among patients with cystic fibrosis.
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Affiliation(s)
- Chris Stockmann
- Department of Pediatrics, Division of Clinical Pharmacology, University of Utah School of Medicine, 295 Chipeta Way, Salt Lake City, UT, 84108, USA
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33
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Kanani MB, Patel MP. Synthesis of N-arylquinolone derivatives bearing 2-thiophenoxyquinolines and their antimicrobial evaluation. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2014.04.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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34
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Kim JB, Jung SI, Hwang EC, Kwon DD. Prevalence of antibiotic-resistant bacteria on rectal swabs and factors affecting resistance to antibiotics in patients undergoing prostate biopsy. Korean J Urol 2014; 55:201-6. [PMID: 24648876 PMCID: PMC3956950 DOI: 10.4111/kju.2014.55.3.201] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Accepted: 10/01/2013] [Indexed: 11/18/2022] Open
Abstract
Purpose The prevalence of antibiotic-resistant bacteria on rectal swabs in patients undergoing transrectal ultrasound (TRUS)-guided prostate biopsy and the factors affecting resistance to antibiotics were evaluated. Materials and Methods Two hundred twenty-three men who underwent TRUS-guided prostate biopsy from November 2011 to December 2012 were retrospectively evaluated. Rectal swabs were cultured on MacConkey agar to identify antibiotic-resistant bacteria in rectal flora before TRUS-guided prostate biopsy. All patients were admitted and received intravenous antibiotics before prostate biopsy. Clinical variables including underlying disease, infectious complications, and antibiotics associated with resistance were evaluated. Logistic regression was used to determine the factors influencing antibiotic resistance. Results Of the 233 patients, 161 had positive rectal cultures. Escherichia coli was cultured in 130 (80.7%) and Klebsiella pneumonia in 16 (9.9%). The prevalence of quinolone resistance was 16.8% and the prevalence of extended-spectrum beta-lactamase (ESBL) positivity was 9.3%. A previous history of prostatitis was correlated with quinolone resistance and ESBL positivity (both p=0.001). The factors affecting quinolone resistance in the univariate analysis were a previous history of prostatitis (p=0.003) and previous exposure to antibiotics (p=0.040). Only a previous history of prostatitis was statistically significant in the multivariate analysis (p=0.014). Four patients had infectious complications. Conclusions The prevalence of quinolone resistance was 16.8% in rectal swabs performed before TRUS-guided prostate biopsy. A previous history of prostatitis was influential. In patients with a history of prostatitis, selection of prophylactic antibiotics before the biopsy may be reconsidered.
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Affiliation(s)
- Jong Beom Kim
- Department of Urology, Chonnam National University Medical School, Gwangju, Korea
| | - Seung Il Jung
- Department of Urology, Chonnam National University Medical School, Gwangju, Korea
| | - Eu Chang Hwang
- Department of Urology, Chonnam National University Medical School, Gwangju, Korea
| | - Dong Deuk Kwon
- Department of Urology, Chonnam National University Medical School, Gwangju, Korea
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Tomioka H, Tatano Y, Yasumoto K, Shimizu T. Recent advances in antituberculous drug development and novel drug targets. Expert Rev Respir Med 2014; 2:455-71. [DOI: 10.1586/17476348.2.4.455] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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36
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The ABC-type efflux pump MacAB protects Salmonella enterica serovar typhimurium from oxidative stress. mBio 2013; 4:e00630-13. [PMID: 24169575 PMCID: PMC3809562 DOI: 10.1128/mbio.00630-13] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Multidrug efflux pumps are integral membrane proteins known to actively excrete antibiotics. The macrolide-specific pump MacAB, the only ABC-type drug efflux pump in Salmonella, has previously been linked to virulence in mice. The molecular mechanism of this link between macAB and infection is unclear. We demonstrate that macAB plays a role in the detoxification of reactive oxygen species (ROS), compounds that salmonellae are exposed to at various stages of infection. macAB is induced upon exposure to H2O2 and is critical for survival of Salmonella enterica serovar Typhimurium in the presence of peroxide. Furthermore, we determined that macAB is required for intracellular replication inside J774.A1 murine macrophages but is not required for survival in ROS-deficient J774.D9 macrophages. macAB mutants also had reduced survival in the intestine in the mouse colitis model, a model characterized by a strong neutrophilic intestinal infiltrate where bacteria may experience the cytotoxic actions of ROS. Using an Amplex red-coupled assay, macAB mutants appear to be unable to induce protection against exogenous H2O2in vitro, in contrast to the isogenic wild type. In mixed cultures, the presence of the wild-type organism, or media preconditioned by the growth of the wild-type organism, was sufficient to rescue the macAB mutant from peroxide-mediated killing. Our data indicate that the MacAB drug efflux pump has functions beyond resistance to antibiotics and plays a role in the protection of Salmonella against oxidative stress. Intriguingly, our data also suggest the presence of a soluble anti-H2O2 compound secreted by Salmonella cells through a MacAB-dependent mechanism. The ABC-type multidrug efflux pump MacAB is known to be required for Salmonella enterica serovar Typhimurium virulence after oral infection in mice, yet the function of this pump during infection is unknown. We show that this pump is necessary for colonization of niches in infected mice where salmonellae encounter oxidative stress during infection. MacAB is required for growth in cultured macrophages that produce reactive oxygen species (ROS) but is not needed in macrophages that do not generate ROS. In addition, we show that MacAB is required to resist peroxide-mediated killing in vitro and for the inactivation of peroxide in the media. Finally, wild-type organisms, or supernatant from wild-type organisms grown in the presence of peroxide, rescue the growth defect of macAB mutants in H2O2. MacAB appears to participate in the excretion of a compound that induces protection against ROS-mediated killing, revealing a new role for this multidrug efflux pump.
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Sureshkumar V, Sarathchandra G, Ramesh J. Biochemical, histopathological and ultra structural profile after pulsed water medication of enrofloxacin in broiler chickens. Vet World 2013. [DOI: 10.14202/vetworld.2013.668-673] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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In Vitro Evaluation of Zn–Norfloxacin Complex as a Potent Cytotoxic and Antibacterial Agent, Proposed Model for DNA Binding. Appl Biochem Biotechnol 2013; 170:988-1009. [DOI: 10.1007/s12010-013-0255-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 04/21/2013] [Indexed: 10/26/2022]
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Lee S, Kim B, Kim J. Development of isotope dilution-liquid chromatography tandem mass spectrometry for the accurate determination of fluoroquinolones in animal meat products: Optimization of chromatographic separation for eliminating matrix effects on isotope ratio measurements. J Chromatogr A 2013; 1277:35-41. [DOI: 10.1016/j.chroma.2012.12.047] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 11/28/2012] [Accepted: 12/21/2012] [Indexed: 10/27/2022]
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40
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Ofloxacin induces apoptosis via β1 integrin-EGFR-Rac1-Nox2 pathway in microencapsulated chondrocytes. Toxicol Appl Pharmacol 2013; 267:74-87. [DOI: 10.1016/j.taap.2012.12.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Revised: 11/21/2012] [Accepted: 12/06/2012] [Indexed: 01/08/2023]
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41
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Guan X, Xue X, Liu Y, Wang J, Wang Y, Wang J, Wang K, Jiang H, Zhang L, Yang B, Wang N, Pan L. Plasmid-mediated quinolone resistance--current knowledge and future perspectives. J Int Med Res 2013; 41:20-30. [PMID: 23569126 DOI: 10.1177/0300060513475965] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Quinolones are a group of antimicrobial agents that were serendipitously discovered as byproducts of the synthesis of chloroquine. Chemical modifications, such as the addition of fluorine or piperazine, resulted in the synthesis of third- and fourth-generation fluoroquinolones, with broad-spectrum antimicrobial actions against aerobic or anaerobic, Gram-positive or Gram-negative bacteria. The efficacy and consequent widespread use of quinolones and fluoroquinolones has led to a steady global increase in resistance, mediated via gene mutations, alterations in efflux or cell membranes and plasmid-conferred resistance. The first plasmid-mediated quinolone resistance gene, qnrA1, was detected in 1998. Since then, many other genes have been identified and the underlying mechanisms of resistance have been elucidated. This review provides an overview of quinolone resistance, with particular emphasis on plasmid-mediated resistance.
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Affiliation(s)
- Xizhou Guan
- Department of Respiratory Diseases, Chinese PLA General Hospital, Beijing, China
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42
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The Use of Single-Agent Antibacterial Regimens in the Treatment of Advanced Appendicitis with Peritonitis. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/bf03258337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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43
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He X, Wang Z, Nie X, Yang Y, Pan D, Leung AOW, Cheng Z, Yang Y, Li K, Chen K. Residues of fluoroquinolones in marine aquaculture environment of the Pearl River Delta, South China. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2012; 34:323-335. [PMID: 21881861 DOI: 10.1007/s10653-011-9420-4] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Accepted: 08/04/2011] [Indexed: 05/27/2023]
Abstract
Concentrations and distributions of selected fluoroquinolones (norfloxacin, ciprofloxacin and enrofloxacin) in water, sediments and nine kinds of fish species collected from 6 sites in two marine aquaculture regions of the Pearl River Delta, China, were analyzed by using high-performance liquid chromatography with fluorescence detector (HPLC). The results showed that the concentrations of ciprofloxacin and enrofloxacin were below the limits of quantification (LOQ) in all water samples except for norfloxacin. Norfloxacin and ciprofloxacin concentrations ranged from 1.88 to 11.20 ng g(-1) dry wt, 0.76-2.42 ng g(-1) dry wt in sediments collected from the Dapeng'ao region (sites 1-3) and ranged from 2.31 to 4.75 ng g(-1) dry wt, 1.26-1.76 ng g(-1) dry wt in sediments collected from the Hailing Island region (sites 4-6), respectively. However, no enrofloxacin was found in all sediment samples. The three fluoroquinolones (FQs) were detected in all fish samples, and the concentrations were higher in liver tissues than those in muscle tissues. The levels of norfloxacin were higher than ciprofloxacin and enrofloxacin in both liver and muscle tissues. Among the nine marine fish species, Siganus fuscescens from Hailing Island had a significantly high level of norfloxacin in liver tissue (254.58 ng g(-1) wet wt), followed by Sparus macrocephalus (133.15 ng g(-1) wet wt) from Dapeng'ao, and the lowest value was Lutianus argentimaculatus (5.18 ng g(-1) wet wt) from Hailing Island. The obtained results of FQs in present study do not represent a risk to the human health in Guangdong coastal area, based on the maximum residue limits (MRLs) established by Chinese Government and the acceptable daily intake (ADI) recommended by the Food and Agriculture Organization and World Health Organization (FAO/WHO).
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Affiliation(s)
- Xiuting He
- Institute of Hydrobiology, Jinan University, Guangzhou, 510632, China
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44
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Sarver JG, Trendel JA, Bearss NR, Wang L, Luniwal A, Erhardt PW, Viola RE. Early stage efficacy and toxicology screening for antibiotics and enzyme inhibitors. ACTA ACUST UNITED AC 2012; 17:673-82. [PMID: 22460173 DOI: 10.1177/1087057112438769] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The rise in organisms resistant to existing drugs has added urgency to the search for new antimicrobial agents. Aspartate β-semialdehyde dehydrogenase (ASADH) catalyzes a critical step in an essential microbial pathway that is absent in mammals. Our laboratory is using fragment library screening to identify efficient and selective ASADH inhibitors. These preliminary agents are then tested to identify compounds with desired antimicrobial properties for further refinement. Toward this end, we have established a microplate-based, dual-assay approach using a single reagent to evaluate antibiotic activity and mammalian cell toxicity during early stage development. The bacterial assay uses nonpathogenic bacteria to allow efficacy testing without a dedicated microbial laboratory. Toxicity assays are performed with a panel of mammalian cells derived from representative susceptible tissues. These assays can be adapted to target other microbial systems, such as fungi and biofilms, and additional mammalian cell lines can be added as needed. Application of this screening approach to antibiotic standards demonstrates the ability of these assays to identify bacterial selectivity and potential toxicity issues. Tests with selected agents from the ASADH inhibitor fragment library show some compounds with antibiotic activity, but as expected, most of these early agents display higher than desired mammalian cell toxicity.
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Affiliation(s)
- Jeffrey G Sarver
- Center for Drug Design and Development, University of Toledo, Toledo, OH, USA.
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Nawaz M, Khan SA, Tran Q, Sung K, Khan AA, Adamu I, Steele RS. Isolation and characterization of multidrug-resistant Klebsiella spp. isolated from shrimp imported from Thailand. Int J Food Microbiol 2012; 155:179-84. [PMID: 22405354 DOI: 10.1016/j.ijfoodmicro.2012.02.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 01/30/2012] [Accepted: 02/02/2012] [Indexed: 11/26/2022]
Abstract
A study was undertaken to isolate and characterize tetracycline and nalidixic acid-resistant Klebsiella spp. in farm-raised, imported shrimp sold in the United States. Sixty-seven multiple antibiotic-resistant Klebsiella spp. strains were isolated from imported shrimp samples. Using morphological and biochemical methods, fifty-three strains were tentatively identified as Klebsiella pneumoniae and fourteen as K. oxytoca. Although all isolates were resistant to tetracycline, only 8 were resistant to nalidixic acid. These 8 isolates were further screened by PCR for quinolone resistance genes (qnrA, B, S, gyrA, B and parC). PCR protocols failed to amplify any qnr genes. The purified PCR amplicons of gyrA, gyrB and parC were sequenced and analyzed for point mutations that confer resistance to fluoroquinolone antibiotics. Analysis of the sequences of the gyrA amplicons from nalidixic acid-resistant Klebsiella spp. indicated two point mutations in gyrA at positions 83 (Ser→Phe) and 87 (Asp→Ala). Sequence analysis of the parC amplicons indicated an amino acid change at position 80 (Ser→Ile). No mutations were detected in gyrB. Template DNA from all isolates was screened for tetracycline resistance genes (tetA-E). Oligonucleotide primers specifically targeting a 305-bp region of tetB and a 477-bp region of tetD successfully amplified sequences from 91.0 and 44.0% of the isolates, respectively. None of the isolates contained tetA, tetC or tetE genes. Plasmids (2.0-16.0kb) were found in 23 of the 67 isolates. XbaI-PFGE identified 32 distinct macro restriction patterns (mrps) among the 61 multiple drug-resistant Klebsiella spp. that were typable. Our results indicate that imported shrimp is a reservoir for multidrug resistant Klebsiella spp. and potential health risks posed by such strains should not be underestimated.
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Affiliation(s)
- Mohamed Nawaz
- Division of Microbiology, National Center for Toxicological Research, US Food and Drug Administration, Jefferson, AR 72079, USA.
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Minamida S, Satoh T, Tabata K, Kimura M, Tsumura H, Kurosaka S, Matsumoto K, Fujita T, Iwamura M, Baba S. Prevalence of Fluoroquinolone-resistant Escherichia coli Before and Incidence of Acute Bacterial Prostatitis After Prostate Biopsy. Urology 2011; 78:1235-9. [DOI: 10.1016/j.urology.2011.07.1392] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 07/11/2011] [Accepted: 07/11/2011] [Indexed: 10/17/2022]
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47
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Talla V, Veerareddy PR. Oxidative stress induced by fluoroquinolones on treatment for complicated urinary tract infections in Indian patients. J Young Pharm 2011; 3:304-9. [PMID: 22224037 PMCID: PMC3249743 DOI: 10.4103/0975-1483.90242] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The aim of the study is to examine the oxidative stress in patients on fluoroquinolones (ciprofloxacin, levofloxacin, gatifloxacin) therapy for complicated urinary tract infections and to correlate with plasma concentrations at different time intervals. Superoxide dismutase (SOD), glutathione, plasma antioxidant status and lipid peroxides were evaluated in 52 patients on different dosage regimens up to 5 days. There is significant and gradual elevation of lipid peroxide levels in patients on ciprofloxacin (3.6 ± 0.34 nmol/ml to 6.2 ± 0.94 nmol/ml) and levofloxacin (3.5 ± 0.84 nmol/ml to 5.1 ± 0.28 nmol/ml) dosage regimen but not with gatifloxacin (3.5 ± 0.84 nmol/ml to 3.74 ± 0.17 nmol.ml). There was substantial depletion in both SOD and glutathione levels particularly with ciprofloxacin. On the 5(th) day of treatment, plasma antioxidant status decreased by 77.6% %, 50.5%, 7.56% for ciprofloxacin, levofloxacin and gatifloxacin respectively. In conclusion ciprofloxacin and levofloxacin induce more reactive oxygen species that lead to cell damage than gatifloxacin irrespective of their concentrations in patient population.
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Affiliation(s)
- V Talla
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - PR Veerareddy
- Department of Pharmaceutics, St Peters’ Institute of Pharmaceutical Sciences, Warangal, Andhra Pradesh, India
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48
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Interaction between ciprofloxacin and chloroquine in mice infected with chloroquine resistant Plasmodium berghei. Parasitol Res 2011; 110:895-9. [DOI: 10.1007/s00436-011-2573-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Accepted: 07/24/2011] [Indexed: 11/26/2022]
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49
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Mortensen NP, Fowlkes JD, Maggart M, Doktycz MJ, Nataro JP, Drusano G, Allison DP. Effects of sub-minimum inhibitory concentrations of ciprofloxacin on enteroaggregative Escherichia coli and the role of the surface protein dispersin. Int J Antimicrob Agents 2011; 38:27-34. [DOI: 10.1016/j.ijantimicag.2011.03.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Revised: 03/08/2011] [Accepted: 03/09/2011] [Indexed: 10/18/2022]
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50
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Roy B, Nandi U, Das A, Pal TK. Acute and twenty-eight days repeated oral dose toxicity study of besifloxacin in Wistar albino rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2011; 32:82-101. [PMID: 21787734 DOI: 10.1016/j.etap.2011.03.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2010] [Revised: 03/27/2011] [Accepted: 03/28/2011] [Indexed: 05/31/2023]
Abstract
The purpose of this study was to investigate the potential acute and 28-day repeated oral toxicities of besifloxacin (BAF) in Wistar albino rats. In oral acute and repeated dose study, BAF was administered to both sex of rats, at dose levels of 0, 300, 600, 900 mg/kg/day and 0, 100, 200, 500 mg/kg/day, respectively. In the acute study, total white blood cell (WBC) (male, 43.74%; female, 42.60%) and total bilirubin (T-BIL) (male, 80%; female, 60%) were significantly increase, total protein (TP) (male, 23.24%; 27.80%) was significantly decreased, and significant incidence of pericholangitis (male, 83.33%; female, 75%) was shown in males and females of high-dose groups. In repeated oral dose toxicity study, similar type effects were also observed after serum hematological and serum biochemical analysis, whereas additionally sever hepatic injury and focal ulceration in gastric mucosa also observed in high dose groups of both sexes after histopathological analysis. However these toxic effects of besifloxacin were transient and reversible and no-observed adverse effect level (NOAEL) were 300 mg/kg/day for acute and 100 mg/kg/day for repeated dose toxicity study, respectively.
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Affiliation(s)
- Bikash Roy
- Bioequivalence Study Centre, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India
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