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Nilson R, Penumutchu S, Pagano FS, Belenky P. Metabolic changes associated with polysaccharide utilization reduce susceptibility to some β-lactams in Bacteroides thetaiotaomicron. mSphere 2024; 9:e0010324. [PMID: 39109911 PMCID: PMC11351048 DOI: 10.1128/msphere.00103-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Accepted: 07/07/2024] [Indexed: 08/29/2024] Open
Abstract
Antibiotic therapy alters bacterial abundance and metabolism in the gut microbiome, leading to dysbiosis and opportunistic infections. Bacteroides thetaiotaomicron (Bth) is both a commensal in the gut and an opportunistic pathogen in other body sites. Past work has shown that Bth responds to β-lactam treatment differently depending on the metabolic environment both in vitro and in vivo. Studies of other bacteria show that an increase in respiratory metabolism independent of growth rate promotes susceptibility to bactericidal antibiotics. We propose that Bth enters a protected state linked to an increase in polysaccharide utilization and a decrease in the use of simple sugars. Here, we apply antibiotic susceptibility testing, transcriptomic analysis, and genetic manipulation to characterize this polysaccharide-mediated tolerance (PM tolerance) phenotype. We found that a variety of mono- and disaccharides increased the susceptibility of Bth to several different β-lactams compared to polysaccharides. Transcriptomics indicated a metabolic shift from reductive to oxidative branches of the tricarboxylic acid cycle on polysaccharides. Accordingly, supplementation with intermediates of central carbon metabolism had varying effects on PM tolerance. Transcriptional analysis also showed a decrease in the expression of the electron transport chain (ETC) protein NQR and an increase in the ETC protein NUO, when given fiber versus glucose. Deletion of NQR increased Bth susceptibility while deletion of NUO and a third ETC protein NDH2 had no effect. This work confirms that carbon source utilization modulates antibiotic susceptibility in Bth and that anaerobic respiratory metabolism and the ETC play an essential role.IMPORTANCEAntibiotics are indispensable medications that revolutionized modern medicine. However, their effectiveness is challenged by a large array of resistance and tolerance mechanisms. Treatment with antibiotics also disrupts the gut microbiome which can adversely affect health. Bacteroides are prevalent in the gut microbiome and yet are frequently involved in anaerobic infections. Thus, understanding how antibiotics affect these bacteria is necessary to implement proper treatment. Recent work has investigated the role of metabolism in antibiotic susceptibility in distantly related bacteria such as Escherichia coli. Using antibiotic susceptibility testing, transcriptomics, and genetic manipulation, we demonstrate that polysaccharides reduce β-lactam susceptibility when compared to monosaccharides. This finding underscores the profound impact of metabolic adaptation on the therapeutic efficacy of antibiotics. In the long term, this work indicates that modulation of metabolism could make Bacteroides more susceptible during infections or protect them in the context of the microbiome.
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Affiliation(s)
- Rachael Nilson
- Department of Molecular Microbiology and Immunology, Brown University, Providence, Rhode Island, USA
| | - Swathi Penumutchu
- Department of Molecular Microbiology and Immunology, Brown University, Providence, Rhode Island, USA
| | - Francesco S. Pagano
- Department of Molecular Microbiology and Immunology, Brown University, Providence, Rhode Island, USA
| | - Peter Belenky
- Department of Molecular Microbiology and Immunology, Brown University, Providence, Rhode Island, USA
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Bonardi A, Nocentini A, Giovannuzzi S, Paoletti N, Ammara A, Bua S, Abutaleb NS, Abdelsattar AS, Capasso C, Gratteri P, Flaherty DP, Seleem MN, Supuran CT. Development of Penicillin-Based Carbonic Anhydrase Inhibitors Targeting Multidrug-Resistant Neisseria gonorrhoeae. J Med Chem 2024; 67:9613-9627. [PMID: 38776401 DOI: 10.1021/acs.jmedchem.4c00740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
The development of antibacterial drugs with new mechanisms of action is crucial in combating the rise of antibiotic-resistant infections. Bacterial carbonic anhydrases (CAs, EC 4.2.1.1) have been validated as promising antibacterial targets against pathogens such as Helicobacter pylori, Neisseria gonorrhoeae, and vancomycin-resistant enterococci. A multitarget strategy is proposed to design penicillin-based CA inhibitor hybrids for tackling resistance by targeting multiple bacterial pathways, thereby resensitizing drug-resistant strains to clinical antibiotics. The sulfonamide derivatives potently inhibited the CAs from N. gonorrhoeae and Escherichia coli with KI values in the range of 7.1-617.2 nM. Computational simulations with the main penicillin-binding protein (PBP) of N. gonorrhoeae indicated that these hybrid derivatives maintained the mechanism of action of the lead β-lactams. A subset of derivatives showed potent PBP-related antigonococcal effects against multidrug-resistant N. gonorrhoeae strains, with several compounds significantly outperforming both the lead β-lactam and CA inhibitor drugs (MIC values in the range 0.25 to 0.5 μg/mL).
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Affiliation(s)
- Alessandro Bonardi
- NEUROFARBA Department, Pharmaceutical and Nutraceutical Section and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, Sesto Fiorentino, Florence 50019, Italy
| | - Alessio Nocentini
- NEUROFARBA Department, Pharmaceutical and Nutraceutical Section and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, Sesto Fiorentino, Florence 50019, Italy
| | - Simone Giovannuzzi
- NEUROFARBA Department, Pharmaceutical and Nutraceutical Section and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, Sesto Fiorentino, Florence 50019, Italy
| | - Niccolò Paoletti
- NEUROFARBA Department, Pharmaceutical and Nutraceutical Section and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, Sesto Fiorentino, Florence 50019, Italy
| | - Andrea Ammara
- NEUROFARBA Department, Pharmaceutical and Nutraceutical Section and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, Sesto Fiorentino, Florence 50019, Italy
| | - Silvia Bua
- Research Institute of the University of Bucharest (ICUB), Bucharest 050663, Romania
| | - Nader S Abutaleb
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Abdallah S Abdelsattar
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | | | - Paola Gratteri
- NEUROFARBA Department, Pharmaceutical and Nutraceutical Section and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, Sesto Fiorentino, Florence 50019, Italy
| | - Daniel P Flaherty
- Borch Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Mohamed N Seleem
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
- Center for One Health Research, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Claudiu T Supuran
- NEUROFARBA Department, Pharmaceutical and Nutraceutical Section and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, Sesto Fiorentino, Florence 50019, Italy
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Wielogorska E, Flynn PB, Meneely J, Thompson TP, Graham WG, Gilmore BF, Elliott CT. Assessment of Cold Atmospheric Pressure Plasma (CAPP) Treatment for Degradation of Antibiotic Residues in Water. Antibiotics (Basel) 2023; 12:1115. [PMID: 37508211 PMCID: PMC10376056 DOI: 10.3390/antibiotics12071115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 06/23/2023] [Accepted: 06/25/2023] [Indexed: 07/30/2023] Open
Abstract
The presence of antibiotic residues in water is linked to the emergence of antibiotic resistance globally and necessitates novel decontamination strategies to minimize antibiotic residue exposure in both the environment and food. A holistic assessment of cold atmospheric pressure plasma technology (CAPP) for β-lactam antibiotic residue removal is described in this study. CAPP operating parameters including plasma jet voltage, gas composition and treatment time were optimized, with highest β-lactam degradation efficiencies obtained for a helium jet operated at 6 kV. Main by-products detected indicate pH-driven peroxidation as a main mechanism of CAPP-induced decomposition of β-lactams. No in vitro hepatocytotoxicity was observed in HepG2 cells following exposure to treated samples, and E. coli exposed to CAPP-degraded β-lactams did not exhibit resistance development. In surface water, over 50% decrease in antibiotic levels was achieved after only 5 min of treatment. However, high dependence of treatment efficiency on residue concentration, pH and presence of polar macromolecules was observed.
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Affiliation(s)
- Ewa Wielogorska
- Institute for Global Food Security, Queen's University Belfast, Belfast BT9 5DL, UK
- School of Pharmacy, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Padrig B Flynn
- School of Pharmacy, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Julie Meneely
- Institute for Global Food Security, Queen's University Belfast, Belfast BT9 5DL, UK
| | | | - William G Graham
- Centre for Plasma Physics, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, UK
| | - Brendan F Gilmore
- Institute for Global Food Security, Queen's University Belfast, Belfast BT9 5DL, UK
- School of Pharmacy, Queen's University Belfast, Belfast BT9 7BL, UK
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Hassan F, Sher M, Hussain MA, Saadia M, Naeem-Ul-Hassan M, Rehman MFU, Haseeb MT, Bukhari SNA, Abbas A, Peng B, Kanwal F, Deng H. Pharmaceutical and Pharmacological Evaluation of Amoxicillin after Solubility Enhancement Using the Spray Drying Technique. ACS OMEGA 2022; 7:48506-48519. [PMID: 36591136 PMCID: PMC9798760 DOI: 10.1021/acsomega.2c06662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
The dose frequency of drugs belonging to class II is usually high and associated with harmful effects on the body. The study aimed to enhance the solubility of the poorly water-soluble drug amoxicillin (AM) by the solid dispersion (SD) technique. Six different SDs of AM, F1-F6, were prepared by the spray drying technique using two other carriers, HP-β-CD (F1-F3) and HPMC (F4-F6), in 1:1, 1:2, and 1:3 drug-to-polymer ratios. These SDs were analyzed to determine their practical yield, drug content, and aqueous solubility using analytical techniques such as Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and powder X-ray diffraction. The effect of polymer concentration on SDs was determined using aqueous solubility, in vitro dissolution, and in vivo studies. The results showed no drug-polymer interactions in SDs. Solubility studies showed that SDs based on the drug-to-polymer ratio of 1:2 (F2 and F5) were highly soluble in water compared to those with ratios of 1:1 and 1:3. In vitro dissolution studies also showed that SDs with a ratio of 1:2 released the highest drug concentration from both polymeric systems. The SDs based on HPMC confirmed the more sustained release of the drug as compared to that of HP-β-CD. All the SDs were observed as stable and amorphous, with a smooth spherical surface. In vivo studies reveal the enhancement of pharmacokinetics parameters as compared to standard AM. Hence, it is confirmed that spray drying is an excellent technique to enhance the solubility of AM in an aqueous medium. This may contribute to the enhancement of the pharmacokinetic behaviors of SDs.
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Affiliation(s)
- Faiza Hassan
- Institute
of Chemistry, University of Sargodha, Sargodha40100, Pakistan
| | - Muhammad Sher
- Institute
of Chemistry, University of Sargodha, Sargodha40100, Pakistan
| | | | - Mubshara Saadia
- Department
of Chemistry, Ghazi University, Dera Ghazi Khan32200, Pakistan
| | | | | | | | - Syed Nasir Abbas Bukhari
- Department
of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka, Aliouf2014, Saudi Arabia
| | - Azhar Abbas
- Institute
of Chemistry, University of Sargodha, Sargodha40100, Pakistan
- Department
of Cardiothoracic Surgery, The Second Affiliated
Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong510006, China
| | - Bo Peng
- Government
Ambala Muslim Graduate College, Sargodha40100, Pakistan
| | - Fariha Kanwal
- School
of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai201620, China
| | - Huibiao Deng
- Department
of Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai200127, China
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Bunnell K, Duong A, Ringsred T, Mian A, Bhathena S. Aminopenicillins for treatment of ampicillin-resistant enterococcal urinary tract infections. Am J Health Syst Pharm 2022; 79:1056-1065. [PMID: 35299243 DOI: 10.1093/ajhp/zxac068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
DISCLAIMER In an effort to expedite the publication of articles related to the COVID-19 pandemic, AJHP is posting these manuscripts online as soon as possible after acceptance. Accepted manuscripts have been peer-reviewed and copyedited, but are posted online before technical formatting and author proofing. These manuscripts are not the final version of record and will be replaced with the final article (formatted per AJHP style and proofed by the authors) at a later time. PURPOSE The purpose of this review is to describe the theory behind and data supporting use of aminopenicillins in the treatment of ampicillin-resistant enterococcal urinary tract infections. SUMMARY Aminopenicillin concentrations in the urine may be high enough to achieve bacterial eradication and clinical cure for infections affecting the lower genitourinary tract, even in the context of in vitro resistance based on established susceptibility breakpoints. A literature search was conducted to identify original research articles describing the use of aminopenicillins in the treatment of urinary tract infections caused by ampicillin-resistant Enterococcus species. Three published retrospective cohort studies were identified, all of which reported that aminopenicillins had similar rates of clinical cure as other antibiotic classes prescribed for the treatment of enterococcal urinary tract infections. CONCLUSION Both pharmacokinetic/pharmacodynamic principles and limited retrospective clinical data support the use of aminopenicillins in the treatment of lower urinary tract infections caused by Enterococcus species, even when the isolates have a minimum inhibitory concentration that exceeds the susceptibility breakpoint.
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Affiliation(s)
- Kristen Bunnell
- Medical College of Wisconsin School of Pharmacy, Milwaukee, WI, USA
| | - Amy Duong
- University of Rochester Medical Center, Rochester, NY, USA
| | | | - Asia Mian
- Aurora West Allis Medical Center, West Allis, WI, USA
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Sato M, Yamana H, Ono S, Ishimaru M, Matsui H, Yasunaga H. Trends in prophylactic antibiotic use for tooth extraction from 2015 to 2018 in Japan: An analysis using a health insurance claims database. J Infect Chemother 2021; 28:504-509. [PMID: 34973876 DOI: 10.1016/j.jiac.2021.12.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 11/30/2021] [Accepted: 12/15/2021] [Indexed: 10/19/2022]
Abstract
INTRODUCTION To describe patterns in antibiotic prophylaxis for tooth extraction following the 2016 Japanese National Action Plan on Antimicrobial Resistance. METHODS Using a health insurance claims database, we retrospectively identified tooth extraction visits by patients aged ≥18 years from September 2015 to August 2018 and classified patients as undergoing extraction of a fully impacted or horizontally impacted mandibular wisdom tooth, being at risk of infective endocarditis or surgical site infection, or being at low risk. Antibiotic use and type of antibiotics prescribed on the day of tooth extraction were evaluated across the study period, with stratification by tooth extraction category and facility type (hospital or dental clinic). RESULTS We identified 662,435 patients with tooth extraction. The mean age was 42.7 years, and 57% were male. Twelve percent underwent wisdom tooth extraction, 32% were high risk, and 10% visited hospitals. The proportion of antibiotic use was 83% overall and 82% among low-risk patients. This proportion remained similar throughout the study period. A shift from third-generation cephalosporins to amoxicillin was observed from 2015 to 2018: the proportion prescribed third-generation cephalosporins decreased from 58% to 34% in hospitals and from 57% to 56% in clinics, and the proportion prescribed amoxicillin increased from 16% to 37% in hospitals and from 6% to 10% in clinics. CONCLUSIONS The pattern of prophylactic antibiotic use for tooth extraction gradually changed after the initiation of the National Action Plan. Further efforts are required to reduce potentially inappropriate prescriptions for low-risk patients, especially in dental clinics.
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Affiliation(s)
- Misuzu Sato
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
| | - Hayato Yamana
- Department of Health Services Research, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
| | - Sachiko Ono
- Department of Eat-loss Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
| | - Miho Ishimaru
- Department of Health Services Research, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Hiroki Matsui
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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7
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Kaur K, Arti S, Banipal TS, Banipal PK. Interactional behavior of saccharides/derivatives with amoxicillin drug in aqueous medium: Insights from volumetric, calorimetric and spectroscopic studies. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Hofsäss MA, Dressman J. Evaluation of Differences in Dosage Form Performance of Generics Using BCS-Based Biowaiver Specifications and Biopharmaceutical Modeling–Case Examples Amoxicillin and Doxycycline. J Pharm Sci 2020; 109:2437-2453. [DOI: 10.1016/j.xphs.2020.04.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/06/2020] [Accepted: 04/17/2020] [Indexed: 12/12/2022]
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Lemaignen A, Bernard L, Tattevin P, Bru JP, Duval X, Hoen B, Brunet-Houdard S, Mainardi JL, Caille A. Oral switch versus standard intravenous antibiotic therapy in left-sided endocarditis due to susceptible staphylococci, streptococci or enterococci (RODEO): a protocol for two open-label randomised controlled trials. BMJ Open 2020; 10:e033540. [PMID: 32665381 PMCID: PMC7365486 DOI: 10.1136/bmjopen-2019-033540] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
INTRODUCTION Left-sided infective endocarditis (IE) is a serious infection with a heavy burden for patients and healthcare system. Oral switch after initial intravenous antibiotic therapy may reduce costs and improve patients' discomfort without increasing unfavourable outcomes. We describe the methodology of two simultaneously conducted open-label randomised trials aiming to assess non-inferiority of oral switch as compared with entirely intravenous antibiotic therapy for the treatment of left-sided IE. METHODS AND ANALYSIS Two simultaneous multicentre open-label prospective randomised trials assessing non-inferiority of oral switch during antibiotic treatment as compared with entirely intravenous therapy in patients with left-sided IE are ongoing. One trial is dedicated to left-sided IE caused by multisusceptible staphylococci (Relais Oral Dans le traitement des Endocardites à staphylocoques ou streptOcoques (RODEO)-1) and the other is dedicated to left-sided IE caused by susceptible streptococci or enterococci (RODEO-2). It is planned to randomise 324 patients in each trial after an initial course of at least 10 days of intravenous antibiotic therapy either to continue intravenous antibiotic therapy or to switch to oral antibiotic therapy. The primary outcome is treatment failure within 3 months after the end of antibiotic treatment, a composite outcome defined by all-cause death and/or symptomatic embolic events and/or unplanned valvular surgery and/or microbiological relapse (with the primary pathogen). Secondary outcomes include patient quality of life, echocardiographic outcome, costs and efficiency associated with IE care. Statistical analysis will be performed with a non-inferiority margin of 10% and a one-sided 2.5% type I error. ETHICS AND DISSEMINATION Written informed consent will be obtained from all participants. This study was approved by Tours Research ethics committee (CPP TOURS-Region Centre-Ouest 1, 2015-R26, 23 February 2016). Study findings will be published in peer-reviewed journals and disseminated through presentation at relevant national and international conferences. TRIAL REGISTRATION NUMBER EudraCT Number: 2015-002371-16 and NCT02701608; NCT02701595.
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Affiliation(s)
- Adrien Lemaignen
- Service de Médecine Interne et Maladies Infectieuses, Centre Hospitalier Régional Universitaire de Tours, Tours, France
- Université de Tours, Faculté de Médecine, PRES Centre-Val de Loire Université, Tours, France
| | - Louis Bernard
- Service de Médecine Interne et Maladies Infectieuses, Centre Hospitalier Régional Universitaire de Tours, Tours, France
| | - Pierre Tattevin
- Service de Maladies Infectieuses et de Réanimation Médicale, Centre Hospitalier Universitaire de Rennes, Rennes, Bretagne, France
| | - Jean-Pierre Bru
- Service d'infectiologie et de médecine interne, Centre Hospitalier Annecy-Genevois, Epagny Metz-Tessy, Rhône-Alpes, France
| | - Xavier Duval
- INSERM Clinical Investigation Center 1425, IAME 1138, Universite Paris Diderot, Sorbonne Paris-Cité, Paris, Île-de-France, France
- Service de Maladies Infectieuses et Tropicales, Assistance Publique-Hôpitaux de Paris, Hôpital Bichat, Paris, France
| | - Bruno Hoen
- Service de Maladies Infectieuses et Tropicales, CHRU de Nancy, Vandoeuvre-les-Nancy, France
| | - Solène Brunet-Houdard
- Unité d'Evaluation Médico-Economique, EA7505, Education Ethique, Santé, Centre Hospitalier Régional Universitaire de Tours, Université de Tours, Tours, Centre, France
| | - Jean-Luc Mainardi
- Service de Microbiologie, APHP, Hôpital Européen Georges Pompidou, Paris, France
| | - Agnes Caille
- Unité d'Evaluation Médico-Economique, EA7505, Education Ethique, Santé, Centre Hospitalier Régional Universitaire de Tours, Université de Tours, Tours, Centre, France
- INSERM CIC1415, CHRU de Tours, Tours, France
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Ion R, Necula MG, Mazare A, Mitran V, Neacsu P, Schmuki P, Cimpean A. Drug Delivery Systems Based on Titania Nanotubes and Active Agents for Enhanced Osseointegration of Bone Implants. Curr Med Chem 2020; 27:854-902. [PMID: 31362646 DOI: 10.2174/0929867326666190726123229] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 01/16/2019] [Accepted: 05/04/2019] [Indexed: 12/31/2022]
Abstract
TiO2 nanotubes (TNTs) are attractive nanostructures for localized drug delivery. Owing to their excellent biocompatibility and physicochemical properties, numerous functionalizations of TNTs have been attempted for their use as therapeutic agent delivery platforms. In this review, we discuss the current advances in the applications of TNT-based delivery systems with an emphasis on the various functionalizations of TNTs for enhancing osteogenesis at the bone-implant interface and for preventing implant-related infection. Innovation of therapies for enhancing osteogenesis still represents a critical challenge in regeneration of bone defects. The overall concept focuses on the use of osteoconductive materials in combination with the use of osteoinductive or osteopromotive factors. In this context, we highlight the strategies for improving the functionality of TNTs, using five classes of bioactive agents: growth factors (GFs), statins, plant derived molecules, inorganic therapeutic ions/nanoparticles (NPs) and antimicrobial compounds.
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Affiliation(s)
- Raluca Ion
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Madalina Georgiana Necula
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Anca Mazare
- University of Erlangen-Nuremberg, Department of Materials Science, Erlangen, Germany
| | - Valentina Mitran
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Patricia Neacsu
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Patrik Schmuki
- University of Erlangen-Nuremberg, Department of Materials Science, Erlangen, Germany
| | - Anisoara Cimpean
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, Bucharest, Romania
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11
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Sørensen CV, Knudsen C, auf dem Keller U, Kalogeropoulos K, Gutiérrez-Jiménez C, Pucca MB, Arantes EC, Bordon KCF, Laustsen AH. Do Antibiotics Potentiate Proteases in Hemotoxic Snake Venoms? Toxins (Basel) 2020; 12:toxins12040240. [PMID: 32283690 PMCID: PMC7232225 DOI: 10.3390/toxins12040240] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 03/30/2020] [Accepted: 04/07/2020] [Indexed: 12/02/2022] Open
Abstract
Antibiotics are often administered with antivenom following snakebite envenomings in order to avoid secondary bacterial infections. However, to this date, no studies have evaluated whether antibiotics may have undesirable potentiating effects on snake venom. Herein, we demonstrate that four commonly used antibiotics affect the enzymatic activities of proteolytic snake venom toxins in two different in vitro assays. Similar findings in vivo could have clinical implications for snakebite management and require further examination.
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Affiliation(s)
- Christoffer V. Sørensen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (C.V.S.); (C.K.); (U.a.d.K.); (K.K.); (C.G.-J.); (M.B.P.)
| | - Cecilie Knudsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (C.V.S.); (C.K.); (U.a.d.K.); (K.K.); (C.G.-J.); (M.B.P.)
- BioPorto Diagnostics A/S, DK-2900 Hellerup, Denmark
| | - Ulrich auf dem Keller
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (C.V.S.); (C.K.); (U.a.d.K.); (K.K.); (C.G.-J.); (M.B.P.)
| | - Konstantinos Kalogeropoulos
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (C.V.S.); (C.K.); (U.a.d.K.); (K.K.); (C.G.-J.); (M.B.P.)
| | - Cristina Gutiérrez-Jiménez
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (C.V.S.); (C.K.); (U.a.d.K.); (K.K.); (C.G.-J.); (M.B.P.)
| | - Manuela B. Pucca
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (C.V.S.); (C.K.); (U.a.d.K.); (K.K.); (C.G.-J.); (M.B.P.)
- Medical School, Federal University of Roraima, Boa Vista BR-69310-000, Brazil
| | - Eliane C. Arantes
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto BR-14040-903, Brazil; (E.C.A.); (K.C.F.B.)
| | - Karla C. F. Bordon
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto BR-14040-903, Brazil; (E.C.A.); (K.C.F.B.)
| | - Andreas H. Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (C.V.S.); (C.K.); (U.a.d.K.); (K.K.); (C.G.-J.); (M.B.P.)
- Correspondence:
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12
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Montanha MC, Diniz A, Silva NMEN, Kimura E, Paixão P. Physiologically-Based Pharmacokinetic Model on the Oral Drug Absorption in Roux-en-Y Gastric Bypass Bariatric Patients: Amoxicillin Tablet and Suspension. Mol Pharm 2019; 16:5025-5034. [PMID: 31721592 DOI: 10.1021/acs.molpharmaceut.9b00870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The potential of a physiologically-based pharmacokinetic (PBPK) model to predict oral amoxicillin bioavailability, by considering the physiological changes after "Roux-en-Y gastric bypass" (RYGB) surgery in bariatric patients, was evaluated. A middle-out approach for parameter estimations was undertaken using in vitro, in situ, and in vivo data. The observed versus predicted plasma concentrations and the model sensitivity of the simulated parameters of AUC0-inf and Cmax of amoxicillin (AMX) were used to confirm the reliability of the estimation. The model considers that a drug-transporter (Transp) in the initial segments of the normal intestine plays a significant role in the AMX absorption. A lower fraction absorbed (Fabs) was observed in RYGB patients (54.43% for suspension and 45.21% for tablets) compared to healthy subjects (77.48% capsule). Furthermore, the tablet formulation presented a lower dissolved fraction (Fd) and Fabs compared to the suspension formulation of AMX in RYGB patients (91.70% and 45.21% versus 99.92% and 54.43%, respectively). The AUC0-inf and Cmax were sensitive to changes in Rtintestine, PeffAMX, and Transp for both healthy and RYGB models. Additionally, AUC0-inf and Cmax were also sensitive to changes in the tlag parameter for tablet formulation in RYGB patients. The PBPK model showed a reduction in AMX bioavailability as a consequence of reduced intestinal length after RYGB surgery. Additionally, the difference in the predicted Fd and Fabs between suspension and tablet suggests that liquid formulations are preferable in postbariatric patients.
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Affiliation(s)
- Maiara Camotti Montanha
- Universidade Estadual de Maringá, Postgraduate Program in Biosciences and Physiopathology (PBF), Maringá, Paraná, Brazil.,Universidade Estadual de Maringá, Clinical Research Centre and Bioequivalence Studies, Maringá, Paraná, Brazil
| | - Andréa Diniz
- Universidade Estadual de Maringá, Department of Pharmacy, Maringá, Paraná, Brazil
| | | | - Elza Kimura
- Universidade Estadual de Maringá, Clinical Research Centre and Bioequivalence Studies, Maringá, Paraná, Brazil.,Universidade Estadual de Maringá, Department of Pharmacy, Maringá, Paraná, Brazil
| | - Paulo Paixão
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
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13
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Zhou Q, Xiao Q, Zhang Y, Wang X, Xiao Y, Shi D. Pig liver esterases PLE1 and PLE6: heterologous expression, hydrolysis of common antibiotics and pharmacological consequences. Sci Rep 2019; 9:15564. [PMID: 31664043 PMCID: PMC6820543 DOI: 10.1038/s41598-019-51580-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 09/19/2019] [Indexed: 11/09/2022] Open
Abstract
Carboxylesterases, historically referred as non-specific esterases, are ubiquitous hydrolases with high catalytic efficiency. Without exceptions, all mammalian species studied contain multiple forms of carboxylesterases. While having been widely studied in humans and experimental animals, these enzymes remain to be characterized in farm animals. In this study, we showed that pig liver esterase 1 (PLE1) and pig liver esterase 6 (PLE6) were highly active toward amoxicillin (AMO) and ampicillin (AMP), two major antibiotics that are widely used in food-supplements. Mass-spectrometric analysis established that the hydrolysis occurred at the β-lactam amide bond and the hydrolysis drastically decreased or completely eliminated the antibacterial activity. Furthermore, hydrolytic activity and proteomic analysis suggested that trace PLEs existed in pig plasma and contributed little to the hydrolysis of AMO and AMP. These results suggested that carboxylesterases-based hydrolysis determines the therapeutic intensity of these and related antibiotics and the magnitude of the determination occurs in a species-dependent manner.
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Affiliation(s)
- Qiongqiong Zhou
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Qiling Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Yongliang Zhang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Xiliang Wang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Yuncai Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Deshi Shi
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China. .,Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China. .,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.
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14
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Lin X, Xiang Z, Wang B, Chen H, Zhou T, Hong M. Interaction of swine organic anion transporting polypeptide 1a2 with tetracycline, macrolide and β-lactam antibiotics. Toxicol Appl Pharmacol 2019; 379:114649. [PMID: 31287969 DOI: 10.1016/j.taap.2019.114649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 07/03/2019] [Accepted: 07/05/2019] [Indexed: 11/25/2022]
Abstract
Organic anion-transporting polypeptides (human OATPs; animals Oatps; gene symbol SLCO/Slco) are integral membrane proteins that mediate the sodium-independent transport of a wide range of endogenous compounds as well as many xenobiotics. Antibiotics, antidiabetic drugs, anti-inflammatory drugs, antifungals, antivirals, antihistamines, antihypertensives, fibrates, statins, cardiac glycosides, immunosuppressants, and anticancer drugs are among the substrates transported by OATPs. Because of the broad substrate specificity, wide tissue distribution and the involvement of drug-drug interaction, human OATPs have been extensively recognized as key determinants for drug absorption, distribution and excretion. In a previous study, we cloned a functional orthologue of human OATP1A2 from the pig liver and designated it as swine Oatp1a2 (sOatp1a2) based on sequence analysis and phylogenic study. In the present study, transport capability of swine Oatp1a2 for tetracyclines, macrolides and β-lactam antibiotics was investigated. It was found that most of the tested antibiotics, including the tetracycline family members such as tetracycline, doxycycline, oxytetracycline and chlortetracycline as well as the β-lactam antibiotics such as penicillin, amoxicillin and cefquinome are directly transported by sOatp1a2; while macrolides such as tylosin, tilmicosin, clarithromycin and erythromycin may only inhibit uptake function of the transporter. As a group of well-known inhibitors of OATP family members, the effect of flavonoids on sOatp1a2 function was evaluated and it was found that all the flavonoids tested are inhibitors of the swine transporter as well.
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Affiliation(s)
- Xunkai Lin
- College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Zhaojian Xiang
- College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Bo Wang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Hong Chen
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Tong Zhou
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Mei Hong
- College of Life Sciences, South China Agricultural University, Guangzhou, China; Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, South China Agricultural University, Guangzhou, China.
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15
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Litskas VD, Karamanlis XN, Prousali SP, Koveos DS. Effects of the Antibiotic Amoxicillin on Key Species of the Terrestrial Environment. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 100:509-515. [PMID: 29484446 DOI: 10.1007/s00128-018-2302-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 02/20/2018] [Indexed: 06/08/2023]
Abstract
The antibiotic amoxicillin (AMX) is globally important for human and animal health. Although AMX is considered as a threat for the aquatic and terrestrial environment, limited data are present for its toxicity against key species such as denitrifying bacteria in soil, earthworms and plants. In the present research, the OECD protocols for environmental risk assessment were applied to study AMX acute toxicity, at nominal concentrations, close to the environmentally relevant, in soil bacteria responsible for nitrogen cycling, in the earthworm species Eisenia fetida and six plant species. The results revealed no significant effects of the antibiotic on the parameters related to the end-points of each respective test, at the selected concentration range. Therefore, the antibiotic did not present acute toxicity for the species, under the framework of the OECD tests. Further research is essential to be conducted also considering the patterns of degradation of AMX during the experimental periods.
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Affiliation(s)
- V D Litskas
- Lab. Ecology & Protection of Environment, School of Veterinary Medicine, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.
| | - X N Karamanlis
- Lab. Ecology & Protection of Environment, School of Veterinary Medicine, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.
| | - S P Prousali
- Lab. Ecology & Protection of Environment, School of Veterinary Medicine, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - D S Koveos
- Laboratory of Applied Zoology and Parasitology, School of Agriculture, Aristotle University, 54124, Thessaloniki, Greece
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16
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Community Composition Determines Activity of Antibiotics against Multispecies Biofilms. Antimicrob Agents Chemother 2017; 61:AAC.00302-17. [PMID: 28696232 DOI: 10.1128/aac.00302-17] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 07/02/2017] [Indexed: 02/07/2023] Open
Abstract
In young cystic fibrosis (CF) patients, Staphylococcus aureus is typically the most prevalent organism, while in adults, Pseudomonas aeruginosa is the major pathogen. More recently, it was observed that also Streptococcus anginosus plays an important role in exacerbations of respiratory symptoms. These species are often coisolated from CF lungs, yet little is known about whether antibiotic killing of one species is influenced by the presence of others. In the present study, we compared the activities of various antibiotics against S. anginosus, S. aureus, and P. aeruginosa when grown in monospecies biofilms with the activity observed in a multispecies biofilm. Our results show that differences in antibiotic activity against species grown in mono- and multispecies biofilms are species and antibiotic dependent. Fewer S. anginosus cells are killed by antibiotics that interfere with cell wall synthesis (amoxicillin plus sulbactam, cefepime, imipenem, meropenem, and vancomycin) in the presence of S. aureus and P. aeruginosa, while for ciprofloxacin, levofloxacin, and tobramycin, no difference was observed. In addition, we observed that the cell-free supernatant of S. aureus, but not that of P. aeruginosa biofilms, also caused this decrease in killing. Overall, S. aureus was more affected by antibiotic treatment in a multispecies biofilm, while for P. aeruginosa, no differences were observed between growth in mono- or multispecies biofilms. The results of the present study suggest that it is important to take the community composition into account when evaluating the effect of antimicrobial treatments against certain species in mixed biofilms.
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17
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Thambavita D, Galappatthy P, Mannapperuma U, Jayakody L, Cristofoletti R, Abrahamsson B, Groot DW, Langguth P, Mehta M, Parr A, Polli JE, Shah VP, Dressman J. Biowaiver Monograph for Immediate-Release Solid Oral Dosage Forms: Amoxicillin Trihydrate. J Pharm Sci 2017; 106:2930-2945. [PMID: 28483422 DOI: 10.1016/j.xphs.2017.04.068] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 04/18/2017] [Accepted: 04/25/2017] [Indexed: 10/19/2022]
Abstract
Literature and experimental data relevant to waiver of in vivo bioequivalence (BE) testing for the approval of immediate-release solid oral dosage forms containing amoxicillin trihydrate are reviewed. Solubility and permeability characteristics according to the Biopharmaceutics Classification System (BCS), therapeutic uses, therapeutic index, excipient interactions, as well as dissolution and BE and bioavailability studies were taken into consideration. Solubility and permeability studies indicate that amoxicillin doses up to 875 mg belong to BCS class I, whereas 1000 mg belongs to BCS class II and doses of more than 1000 mg belong to BCS class IV. Considering all aspects, the biowaiver procedure can be recommended for solid oral products of amoxicillin trihydrate immediate-release preparations containing amoxicillin as the single active pharmaceutical ingredient at dose strengths of 875 mg or less, provided (a) only the excipients listed in this monograph are used, and only in their usual amounts, (b) the biowaiver study is performed according to the World Health Organization-, U.S. Food and Drug Administration-, or European Medicines Agency-recommended method using the innovator as the comparator, and (c) results comply with criteria for "very rapidly dissolving" or "similarly rapidly dissolving." Products containing other excipients and those containing more than 875 mg amoxicillin per unit should be subjected to an in vivo BE study.
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Affiliation(s)
- Dhanusha Thambavita
- Department of Pharmacology and Pharmacy, Faculty of Medicine, University of Colombo, Colombo 08, Sri Lanka
| | - Priyadarshani Galappatthy
- Department of Pharmacology and Pharmacy, Faculty of Medicine, University of Colombo, Colombo 08, Sri Lanka
| | - Uthpali Mannapperuma
- Department of Pharmacology and Pharmacy, Faculty of Medicine, University of Colombo, Colombo 08, Sri Lanka
| | - Lal Jayakody
- Department of Pharmacology and Pharmacy, Faculty of Medicine, University of Colombo, Colombo 08, Sri Lanka
| | - Rodrigo Cristofoletti
- Division of Bioequivalence, Brazilian Health Surveillance Agency (Anvisa), Brasilia, Brazil
| | | | - Dirk W Groot
- RIVM (National Institute for Public Health and the Environment), Bilthoven, The Netherlands
| | - Peter Langguth
- Pharmaceutical Technology and Biopharmaceutics, Institute of Pharmacy and Biochemistry, Johannes Gutenberg-University, Mainz, Germany
| | - Mehul Mehta
- Division of Clinical Pharmacology, Centre for Drug Evaluation and Research, United States Food and Drug Administration, Silver Spring, Maryland 20993
| | - Alan Parr
- BioCeutics LLC, Cary, North Carolina 28594
| | - James E Polli
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland 21201
| | - Vinod P Shah
- International Pharmaceutical Federation (FIP), The Hague, The Netherlands
| | - Jennifer Dressman
- Institute of Pharmaceutical Technology, Johann Wolfgang Goethe University, Frankfurt am Main, Germany.
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18
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19
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Hirte K, Seiwert B, Schüürmann G, Reemtsma T. New hydrolysis products of the beta-lactam antibiotic amoxicillin, their pH-dependent formation and search in municipal wastewater. WATER RESEARCH 2016; 88:880-888. [PMID: 26613181 DOI: 10.1016/j.watres.2015.11.028] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 10/20/2015] [Accepted: 11/09/2015] [Indexed: 05/18/2023]
Abstract
Amoxicillin (AMX) is a widespread β-lactam-antibiotic and, together with some of its transformation products (TPs) originating from hydrolysis, a known environmental contaminant. To shed light on the abiotic degradation of AMX and the stability of its known TPs, laboratory hydrolysis experiments of AMX were carried out at pH 3, 7 and 11. Not only the rate of hydrolysis but also the pattern of TPs was strongly pH-dependent. The time courses of the obtained transformation products were analyzed by UPLC-HR-QToF-MS. AMX penicilloic acid (TP 1), AMX 2',5'-diketopiperazine (TP 2), AMX penilloic acid (TP 3) and 3-(4-hydroxyphenyl)pyrazinol (TP 4) were found at neutral pH. Surprisingly, the first three were not stable but transformed into 23 yet unknown TPs within three to four weeks. Seven TPs were tentatively identified, based on their product ion spectra and, where possible, confirmed with reference standards, e.g. penicillamine disulfide, 2-[amino(carboxy)methyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxylic acid and dehydrocarboxylated amoxicillin penilloic acid. Analysis of samples from municipal wastewater treatment plants confirmed these findings with TP 1 being the dominant TP in the influent and a shift towards TP 2, TP 3 and TP 4 in the effluents. The lab experiments predicted up to 13 consecutive TPs from TP 1, TP 2 and TP 3 under neutral conditions. Their detection from surface waters will be difficult, because their large number and slow formation kinetics will lead to comparatively low environmental concentrations. Nevertheless the abiotic degradation of TP 1, TP 2 and TP 3 to further TPs needs to be considered in future studies of the environmental fate of amoxicillin.
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Affiliation(s)
- Kristin Hirte
- UFZ Department of Analytical Chemistry, Helmholtz Center for Environmental Research, Permoserstrasse 15, 04318 Leipzig, Germany; UFZ Department of Ecological Chemistry, Helmholtz Center for Environmental Research, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Bettina Seiwert
- UFZ Department of Analytical Chemistry, Helmholtz Center for Environmental Research, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Gerrit Schüürmann
- UFZ Department of Ecological Chemistry, Helmholtz Center for Environmental Research, Permoserstrasse 15, 04318 Leipzig, Germany; Institute for Organic Chemistry, Technical University Bergakademie Freiberg, Leipziger Strasse 29, 09596 Freiberg, Germany
| | - Thorsten Reemtsma
- UFZ Department of Analytical Chemistry, Helmholtz Center for Environmental Research, Permoserstrasse 15, 04318 Leipzig, Germany.
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20
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Richey EM, Waters PW, Jovic M, Rakhman C. Treatment of Ampicillin-Resistant Enterococcus faecium Urinary Tract Infections. Fed Pract 2015; 32:20-23. [PMID: 30766068 PMCID: PMC6363309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
There was no statistically significant difference between amoxicillin and nitrofurantoin for the treatment of ampicillin-resistant Enterococcus faecium urinary tract infections.
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Affiliation(s)
- Erica M Richey
- , , and are clinical pharmacy specialists, and is an infectious disease pharmacist, all at the Jesse Brown VAMC in Chicago, Illinois
| | - Patrick W Waters
- , , and are clinical pharmacy specialists, and is an infectious disease pharmacist, all at the Jesse Brown VAMC in Chicago, Illinois
| | - Milica Jovic
- , , and are clinical pharmacy specialists, and is an infectious disease pharmacist, all at the Jesse Brown VAMC in Chicago, Illinois
| | - Claudia Rakhman
- , , and are clinical pharmacy specialists, and is an infectious disease pharmacist, all at the Jesse Brown VAMC in Chicago, Illinois
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21
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Borrelia burgdorferi, the Causative Agent of Lyme Disease, Forms Drug-Tolerant Persister Cells. Antimicrob Agents Chemother 2015; 59:4616-24. [PMID: 26014929 DOI: 10.1128/aac.00864-15] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Accepted: 05/17/2015] [Indexed: 11/20/2022] Open
Abstract
Borrelia burgdorferi is the causative agent of Lyme disease, which affects an estimated 300,000 people annually in the United States. When treated early, the disease usually resolves, but when left untreated, it can result in symptoms such as arthritis and encephalopathy. Treatment of the late-stage disease may require multiple courses of antibiotic therapy. Given that antibiotic resistance has not been observed for B. burgdorferi, the reason for the recalcitrance of late-stage disease to antibiotics is unclear. In other chronic infections, the presence of drug-tolerant persisters has been linked to recalcitrance of the disease. In this study, we examined the ability of B. burgdorferi to form persisters. Killing growing cultures of B. burgdorferi with antibiotics used to treat the disease was distinctly biphasic, with a small subpopulation of surviving cells. Upon regrowth, these cells formed a new subpopulation of antibiotic-tolerant cells, indicating that these are persisters rather than resistant mutants. The level of persisters increased sharply as the culture transitioned from the exponential to stationary phase. Combinations of antibiotics did not improve killing. Daptomycin, a membrane-active bactericidal antibiotic, killed stationary-phase cells but not persisters. Mitomycin C, an anticancer agent that forms adducts with DNA, killed persisters and eradicated growing and stationary cultures of B. burgdorferi. Finally, we examined the ability of pulse dosing an antibiotic to eliminate persisters. After addition of ceftriaxone, the antibiotic was washed away, surviving persisters were allowed to resuscitate, and the antibiotic was added again. Four pulse doses of ceftriaxone killed persisters, eradicating all live bacteria in the culture.
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22
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Oral antibiotic therapy for the treatment of infective endocarditis: a systematic review. BMC Infect Dis 2014; 14:140. [PMID: 24624933 PMCID: PMC4007569 DOI: 10.1186/1471-2334-14-140] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 02/13/2014] [Indexed: 11/10/2022] Open
Abstract
Background The role of oral antibiotic therapy in treating infective endocarditis (IE) is not well established. Methods We searched MEDLINE, EMBASE and Scopus for studies in which oral antibiotic therapy was used for the treatment of IE. Results Seven observational studies evaluating the use oral beta-lactams (five), oral ciprofloxacin in combination with rifampin (one), and linezolid (one) for the treatment of IE caused by susceptible bacteria reported cure rates between 77% and 100%. Two other observational studies using aureomycin or sulfonamide, however, had failure rates >75%. One clinical trial comparing oral amoxicillin versus intravenous ceftriaxone for streptococcal IE reported 100% cure in both arms but its reporting had serious methodological limitations. One small clinical trial (n = 85) comparing oral ciprofloxacin and rifampin versus conventional intravenous antibiotic therapy for uncomplicated right-sided S. aureus IE in intravenous drug users (IVDUs) reported cure rates of 89% and 90% in each arm, respectively (P =0.9); however, drug toxicities were more common in the latter group (62% versus 3%; P <0.01). Major limitations of this trial were lack of allocation concealment and blinding at the delivery of the study drug(s) and assessment of outcomes. Conclusion Reported cure rates for IE treated with oral antibiotic regimens vary widely. The use of oral ciprofloxacin in combination with rifampin for uncomplicated right-sided S. aureus IE in IVDUs is supported by one small clinical trial of relatively good quality and could be considered when conventional IV antibiotic therapy is not possible.
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Affiliation(s)
- M.A. Miller
- Department of Basic Sciences; University of Illinois College of Medicine, Peoria School of Medicine; Peoria Illinois
- Department of Biological Sciences; Illinois State University; Normal Illinois
| | - N.B. Kuemmerle
- Department of Basic Sciences; University of Illinois College of Medicine, Peoria School of Medicine; Peoria Illinois
- Department of Biological Sciences; Illinois State University; Normal Illinois
| | - G. Gentile
- Department of Basic Sciences; University of Illinois College of Medicine, Peoria School of Medicine; Peoria Illinois
- Department of Biological Sciences; Illinois State University; Normal Illinois
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24
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Chovel-Sella A, Ben Tov A, Lahav E, Mor O, Rudich H, Paret G, Reif S. Incidence of rash after amoxicillin treatment in children with infectious mononucleosis. Pediatrics 2013; 131:e1424-7. [PMID: 23589810 DOI: 10.1542/peds.2012-1575] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND "Ampicillin rash," a phenomenon unique to patients with Epstein-Barr virus acute infectious mononucleosis (AIM) treated with ampicillin, was first reported in the 1960s. The incidence was estimated as being between 80% and 100%, and the figures have not been reviewed since those first accounts. We sought to establish the current incidence of rash associated with antibiotic treatment among children with AIM. METHODS A retrospective study of all hospitalized children diagnosed as having AIM based upon positive Epstein-Barr virus serology in 2 pediatric tertiary medical centers in Israel. RESULTS Of the 238 children who met the study entry criteria during the study period, 173 were treated with antibiotics. Fifty-seven (32.9%) of the subjects treated with antibiotics had a rash during their illness compared with 15 (23.1%) in untreated patients (P = .156; not significant). Amoxicillin was associated with the highest incidence of antibiotic-induced rash occurrence (29.5%, 95% confidence interval: 18.52-42.57), but significantly lower than the 90% rate reported for ampicillin in past studies. Age, gender, ethnicity, and atopic or allergic history were not associated with the development of rash after antibiotic exposure. Among the laboratory data, only increased white blood cell counts were more prevalent among subjects who did not develop an antibiotic-induced rash. CONCLUSIONS The incidence of rash in pediatric patients with AIM after treatment with the current oral aminopenicillin (amoxicillin) is much lower than originally reported.
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Affiliation(s)
- Aluma Chovel-Sella
- Department of Pediatrics, Dana-Dwek Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
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25
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van Hasselt JGC, Andrew MA, Hebert MF, Tarning J, Vicini P, Mattison DR. The status of pharmacometrics in pregnancy: highlights from the 3(rd) American conference on pharmacometrics. Br J Clin Pharmacol 2013; 74:932-9. [PMID: 22452385 PMCID: PMC3522806 DOI: 10.1111/j.1365-2125.2012.04280.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Physiological changes during pregnancy may alter drug pharmacokinetics. Therefore, mechanistic understanding of these changes and, ultimately, clinical studies in pregnant women are necessary to determine if and how dosing regimens should be adjusted. Because of the typically limited number of patients who can be recruited in this patient group, efficient design and analysis of these studies is of special relevance. This paper is a summary of a conference session organized at the American Conference of Pharmacometrics in April 2011, around the topic of applying pharmacometric methodology to this important problem. The discussion included both design and analysis of clinical studies during pregnancy and in silico predictions. An overview of different pharmacometric methods relevant to this subject was given. The impact of pharmacometrics was illustrated using a range of case examples of studies around pregnancy.
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Affiliation(s)
- J G Coen van Hasselt
- Department of Clinical Pharmacology, Netherlands Cancer Institute, Amsterdam, the Netherlands.
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Mattos Filho TR, Junqueira MDS, Groppo FC, Motta RHL, Perazzo FF. Effect of betamethasone and diclofenac sodium on serum and tissue concentration of amoxicillin. In vivo study in rats. J Appl Oral Sci 2009; 14:319-23. [PMID: 19089051 PMCID: PMC4327221 DOI: 10.1590/s1678-77572006000500004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Accepted: 08/31/2006] [Indexed: 12/02/2022] Open
Abstract
Objective: Antimicrobial agents in combination with anti-inflammatory drugs have been usually prescribed in both Medicine and Dentistry. However, few scientific reports support this clinical practice. The aim of this study was to evaluate the effect of betamethasone and diclofenac sodium on serum and tissue concentration of amoxicillin in rats. Methods: Four polyurethane sponges were implanted in the back skin of 48 rats. After seven days the animals were divided into 6 groups (n=8). Group 1: amoxicillin (25 mg/kg); G2: diclofenac sodium (2.5 mg/kg); G3: betamethasone (0.1 mg/kg); G4: diclofenac sodium and amoxicillin; G5: betamethasone and amoxicillin; and G6: 0.9% sodium chloride solution (1.0 mL - control group). All drugs were administered in a single dose. After 90 minutes, the granulomatous tissues of each animal were surgically removed and weighed. Blood was collected from cervical plexus, centrifuged and 10μL of serum was placed on paper discs. In order to estimate amoxicillin concentration, serum and granulomatous tissues were separately submitted to microbiological assay, which used 108cfu/mL of Staphylococcus aureus ATCC 25923 (penicillin-susceptible strain). After incubation (18 hours, 37°C) the inhibition zones were measured and compared to a regression curve. Results: No inhibition zones were observed for groups 2, 3 and 6. Tissue and serum concentrations of both G1 (4.14μg/g and 2.06μg/mL, respectively) and G5 (3.87μg/g and 1.70μg/mL, respectively) showed statistically significant differences (Kruskal-Wallis, p<0.05) in comparison to G4 (1.45μg/g and 0.41μg/mL, respectively). G1 and G5 did not differ significantly (p>0.05). Conclusion: Considering single doses, betamethasone did not interfere with amoxicillin levels but diclofenac sodium reduced both tissue and serum levels of amoxicillin in rats.
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Affiliation(s)
- Thales Rocha Mattos Filho
- Department of Pharmacology, Anesthesiology and Therapeutics, Piracicaba Dental School - UNICAMP, SP, Brazil
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Pichichero ME, Reed MD. Variations in amoxicillin pharmacokinetic/pharmacodynamic parameters may explain treatment failures in acute otitis media. Paediatr Drugs 2009; 11:243-9. [PMID: 19566108 DOI: 10.2165/00148581-200911040-00003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Pharmacokinetic/pharmacodynamic (PK/PD) modeling and Monte Carlo simulations suggest that amoxicillin should rarely fail as therapy for Streptococcus pneumoniae and Haemophilus influenzae acute otitis media (AOM) infections except when the S. pneumoniae are highly penicillin resistant or the H. influenzae are beta-lactamase producing. However, important and not infrequent exceptions to this expectation have been described. The objective of this review was to define the biologic variations in amoxicillin PK/PD parameters for the treatment of AOM in children and assess whether these variations could explain why the commonly employed amoxicillin PK/PD model is imperfect in predicting outcome for every patient in this clinical setting. To this end, a literature search of MEDLINE (1966-2006) and EMBASE (1974-2006) was conducted to identify studies that evaluated ampicillin or amoxicillin intestinal absorption, serum concentrations, and/or middle ear fluid (MEF) concentrations. Analysis of studies identified for review showed that the intestinal bioavailability of amoxicillin depends on passive diffusion and a saturable 'pump' mechanism that produces variable serum concentrations of the antibacterial agent. Indeed, substantial differences from patient to patient in serum (5- to 30-fold) and MEF (up to 20-fold) concentrations of amoxicillin occur following oral administration, and 15-35% of children have no detectable amoxicillin in MEF. These findings suggest that variability in PK/PD parameters may impact amoxicillin concentrations in serum and MEF, possibly explaining some AOM treatment failures.
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Affiliation(s)
- Michael E Pichichero
- Rochester General Research Institute, Legacy Pediatric Group, Rochester, New York, USA.
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Khuroo AH, Monif T, Verma PRP, Gurule S. Comparison of Effect of Fasting and of Five Different Diets on the Bioavailability of Single Oral Dose of Amoxicillin 500 mg Capsule. ACTA ACUST UNITED AC 2008. [DOI: 10.1080/10601330802064272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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29
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Replication of Colonic Crohn's Disease Mucosal Escherichia coli Isolates within Macrophages and Their Susceptibility to Antibiotics. Antimicrob Agents Chemother 2007; 52:427-34. [PMID: 18070962 DOI: 10.1128/aac.00375-07] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
There is increasing evidence that Escherichia coli organisms are important in Crohn's disease (CD) pathogenesis. In CD tissue they are found within macrophages, and the adherent-invasive CD ileal E. coli isolate LF82 can replicate inside macrophage phagolysosomes. This study investigates replication and antibiotic susceptibility of CD colonic E. coli isolates inside macrophages. Replication of CD colonic E. coli within J774-A1 murine macrophages and human monocyte-derived macrophages (HMDM) was assessed by culture and lysis after gentamicin killing of noninternalized bacteria and verified by electron microscopy (EM). All seven CD colonic isolates tested replicated within J774-A1 macrophages by 3 h (6.36-fold +/- 0.7-fold increase; n = 7 isolates) to a similar extent to CD ileal E. coli LF82 (6.8-fold +/- 0.8-fold) but significantly more than control patient isolates (5.2-fold +/- 0.25-fold; n = 6; P = 0.006) and E. coli K-12 (1.0-fold +/- 0.1-fold; P < 0.0001). Replication of CD E. coli HM605 within HMDM (3.9-fold +/- 0.7-fold) exceeded that for K-12 (1.4-fold +/- 0.2-fold; P = 0.03). EM showed replicating E. coli within macrophage vacuoles. Killing of HM605 within J774-A1 macrophages following a 3-h incubation with antibiotics at published peak serum concentrations (C(max)) was as follows: for ciprofloxacin, 99.5% +/- 0.2%; rifampin, 85.1% +/- 6.6%; tetracycline, 62.8% +/- 6.1%; clarithromycin, 62.1% +/- 5.6% (all P < 0.0001); sulfamethoxazole, 61.3% +/- 7.0% (P = 0.0007); trimethoprim, 56.3% +/- 3.4% (P < 0.0001); and azithromycin, 41.0% +/- 10.5% (P = 0.03). Ampicillin was not effective against intracellular E. coli. Triple antibiotic combinations were assessed at 10% C(max), with ciprofloxacin, tetracycline, and trimethoprim causing 97% +/- 0.0% killing versus 86% +/- 2.0% for ciprofloxacin alone. Colonic mucosa-associated E. coli, particularly CD isolates, replicate within macrophages. Clinical trials are indicated to assess the efficacy of a combination antibiotic therapy targeting intramacrophage E. coli.
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Andrew MA, Easterling TR, Carr DB, Shen D, Buchanan ML, Rutherford T, Bennett R, Vicini P, Hebert MF. Amoxicillin pharmacokinetics in pregnant women: modeling and simulations of dosage strategies. Clin Pharmacol Ther 2007; 81:547-56. [PMID: 17329990 DOI: 10.1038/sj.clpt.6100126] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Amoxicillin is recommended for anthrax prevention in pregnancy. The objective of this study was to evaluate the pharmacokinetics of amoxicillin during pregnancy and postpartum (PP). Sixteen women received amoxicillin during gestation (18-22 weeks (T2) and 30-34 weeks (T3)) as well as 3 months postpartum (PP) to evaluate single-dose pharmacokinetics. Amoxicillin compartmental pharmacokinetic parameters were used to simulate amoxicillin concentration-time profiles following different dosage strategies. Amoxicillin CL(renal) (T2: 24.8+/-6.7 l/h, P<0.001; T3: 24.0+/-3.9 l/h, P<0.001; and PP: 15.3+/-2.6 l/h) and renal CL(secretion) (T2: 280+/-105 ml/min, P<0.002; T3: 259+/-54 ml/min, P<0.001; and PP: 167+/-47 ml/min) were higher during pregnancy than postpartum. Simulations suggest that amoxicillin concentrations adequate to prevent anthrax may be difficult to achieve during pregnancy and postpartum. Increases in amoxicillin CL(renal) and renal CL(secretion) reflect increases in filtration and secretory transport or diminished reabsorption in the kidneys. Amoxicillin may not be an appropriate antibiotic for post-anthrax exposure prophylaxis.
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Affiliation(s)
- M A Andrew
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
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31
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Verbist L. Triple crossover study on absorption and excretion of ampicillin, pivampicillin, and amoxycillin. Antimicrob Agents Chemother 2005; 6:588-93. [PMID: 15825310 PMCID: PMC444697 DOI: 10.1128/aac.6.5.588] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The absorption and excretion of equivalent doses of ampicillin, pivampicillin, and amoxycillin were compared in 10 healthy volunteers after administration of these antibiotics in a randomized triple crossover fashion. As recommended, ampicillin and amoxycillin were administered on an empty stomach, whereas pivampicillin was given with breakfast. The mean half-life times were nearly identical for all three antibiotics: 60.9 min for ampicillin; 58.4 min for pivampicillin; and 62.2 min for amoxycillin. The absorption of the drugs was evaluated according to the following three criteria: the mean peak serum levels; the "area under the curve"; and the percentage of recovery in urine. By these criteria, pivampicillin was the best-absorbed drug, with absorption 3.0 to 3.6 times higher than that of ampicillin and 1.2 to 1.5 times higher than that of amoxycillin, whereas the absorption of amoxycillin was 2.1 to 2.9 times higher than that of ampicillin.
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32
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Groppo FC, Simões RP, Ramacciato JC, Rehder V, de Andrade ED, Mattos-Filho TR. Effect of sodium diclofenac on serum and tissue concentration of amoxicillin and on staphylococcal infection. Biol Pharm Bull 2004; 27:52-5. [PMID: 14709898 DOI: 10.1248/bpb.27.52] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effect of sodium diclofenac on serum and tissue amoxicillin concentration as well as their effect against staphylococcal infection was observed. Four polyurethane sponges were placed in the back of thirty rats. After 14 d, two granulomatous tissues received 0.5 ml of 10(8) cfu/ml (Staphylococcus aureus). Two days later, the rats were divided into five groups: group 1 received amoxicillin 50 mg/kg/p.o., group 2 received amoxicillin 25 mg/kg/p.o., group 3 received sodium diclofenac 2.5 mg/kg/i.m. and amoxicillin 50 mg/kg/p.o., group 4 received sodium diclofenac 2.5 mg/kg/i.m., and group 5 (control group) received NaCl 1 ml/p.o. After six hours of drug administration, blood serum (10 microl) and noninfected granulomatous tissues were placed on Mueller-Hinton agar inoculated with 10(8) cfu/ml (S. aureus). Infected tissues were dispersed in a sonic system and were spread (10 microl) on salt mannitol agar. Microorganisms were counted and the inhibition zones were measured after 18 h of incubation at 37 degrees C. Amoxicillin tissue concentration was 6.27 microg/g for group 1, 2.18 microg/g for group 2, and 0.72 microg/g for group 3. The serum concentrations were 11.56 microg/ml for group 1, 5.36 microg/ml for group 2, and 1.34 microg/ml for group 3. No differences were observed among group 1, 2, and 3 regarding staphylococci counts (Kruskall-Wallis test p>0.05). Group 4 reduced (p<0.05) staphylococci counts comparing to group 5. It was concluded that sodium diclofenac reduced serum and tissue amoxicillin concentration and, even in large doses, amoxicillin was not effective in eradicating the staphylococcal infection after 6 h of administration.
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Affiliation(s)
- Francisco Carlos Groppo
- Department of Pharmacology, Anaesthesiology and Therapeutics-Piracicaba Dentistry School, Campinas State University, Av. Limeira 901, Bairro Areiao, Piracicaba, São Paulo, Brazil.
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33
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Humphrey WR, Shattuck MH, Zielinski RJ, Kuo MST, Biermacher JJ, Smith DP, Jensen JL, Schaadt RD, Zurenko GE, Richards IM. Pharmacokinetics and efficacy of linezolid in a gerbil model of Streptococcus pneumoniae-induced acute otitis media. Antimicrob Agents Chemother 2003; 47:1355-63. [PMID: 12654670 PMCID: PMC152499 DOI: 10.1128/aac.47.4.1355-1363.2003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The oxazolidinone linezolid represents a new antibacterial class of potential benefit in managing multidrug-resistant gram-positive infections, including those caused by Streptococcus pneumoniae. In a gerbil model of acute otitis media (AOM) induced by either penicillin-resistant S. pneumoniae (PRSP; amoxicillin MIC = 8 micro g/ml, linezolid MIC = 1 micro g/ml) or penicillin-susceptible S. pneumoniae (PSSP; amoxicillin MIC = 0.015 micro g/ml, linezolid MIC = 1 micro g/ml), we explored the plasma and ear fluid levels of linezolid required to demonstrate efficacy. Threshold pathogen doses required to induce bilateral AOM (1,500 CFU/ear with PRSP; 30 CFU/ear with PSSP) were administered to gerbils by intrabullar injection on day 0. At peak infection ( approximately 10(6) to 10(7) CFU/ear flush; day 2 for PRSP-AOM and day 3 for PSSP-AOM), twice-a-day oral doses of linezolid, amoxicillin, or vehicle were administered over 4.5 days prior to collection and assay of middle ear effluents for S. pneumoniae content. Linezolid doses of >/=10 mg/kg of body weight induced significant cure rates of >/=72% versus both PRSP and PSSP infections, whereas amoxicillin at </=100 mg/kg was consistently effective only versus PSSP-AOM. Plasma and ear fluid levels of linezolid necessary to elicit pneumococcal eradication from the middle ear were measured by high-performance liquid chromatography-tandem mass spectrometry and found to be similar both within and between each infection protocol. The plasma-ear fluid pharmacodynamic profile associated with linezolid efficacy was a T>MIC of >/=42%, a C(max)/MIC ratio of >/=3.1, and a (24-h area under the curve)/MIC ratio of >/=30 h. Application of this model will be useful in defining preclinical pharmacodynamic relationships of novel antibiotics necessary to cure S. pneumoniae-induced AOM.
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34
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Piccolomini R, Di Bonaventura G, Picciani C, Laterza F, Vecchiet J, Neri M. In vitro activity of clarithromycin against intracellular Helicobacter pylori. Antimicrob Agents Chemother 2001; 45:1568-71. [PMID: 11302831 PMCID: PMC90509 DOI: 10.1128/aac.45.5.1568-1571.2001] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The in vitro intracellular effect of clarithromycin, amoxicillin, metronidazole, lansoprazole, and rifabutin, tested at concentrations corresponding to one times the MIC, two times the MIC, and four times the MIC, was evaluated against an invasive Helicobacter pylori strain. At four times the MIC, clarithromycin showed an early bactericidal effect within 4 h of incubation and, in determining the complete killing within a 16 h-incubation period, lansoprazole and rifabutin showed comparable activity, yielding bactericidal activities within 4 and 8 h of incubation, respectively. Amoxicillin and metronidazole showed bacteriostatic activity only.
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Affiliation(s)
- R Piccolomini
- Department of Biomedical Sciences, Clinical Microbiology Laboratory, G. D'Annunzio University, Chieti, Italy.
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35
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Effect of ivermectin on the disposition of amoxicillin in rat blood and brain using microdialysis sampling. Anal Chim Acta 2001. [DOI: 10.1016/s0003-2670(00)01154-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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36
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Hultén K, Rigo R, Gustafsson I, Engstrand L. New pharmacokinetic in vitro model for studies of antibiotic activity against intracellular microorganisms. Antimicrob Agents Chemother 1996; 40:2727-31. [PMID: 9124830 PMCID: PMC163611 DOI: 10.1128/aac.40.12.2727] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The capacity for intracellular growth is an important survival strategy for a large group of common pathogens. Helicobacter pylori, the etiological agent for gastritis and duodenal ulcer, has been shown by both in vivo and in vitro studies to have the capacity to invade epithelial cells. In vitro models are used to study the effect of antibiotics on microoganisms. Most investigations are performed in broth culture or on agar plates, but kinetic models for bacteria in broth have been described. We present a new, kinetic model adapted for intracellular pathogens. A glass chamber, with a metal rack fitting Falcon cell culture inserts, was connected to a pump by rubber tubes. Different tube diameters and pump speeds were evaluated, and the assay was designed to mimic the half-lives of the antibiotics in vivo, i.e., 11.5 h for azithromycin, 5 h for clarithromycin, and 1 h for amoxicillin. Monolayers of HEp-2 cells were grown in the inserts for 2 days, after which H. pylori (clinical strain 88-23), was added to the system. Internalization was allowed for 12 h, and extracellular H. pylori cells were eradicated with gentamicin. The inserts were moved to the glass chamber, containing medium with 12.5 mg of either amoxicillin or azithromycin per liter or 2.4 mg of clarithromycin per liter. This represents 12.5, 50, and 80 times the extracellular minimum bactericidal concentration value, respectively. Samples were taken at 0, 2, 4, 6, 8, and 24 h. The HEp-2 cells were lysed, and intracellular bacteria were counted by plating. Inserts with infected cells grown in drug-free medium were included as controls for each time interval. A 3-log10 reduction of H. pylori was achieved in the experiments with azithromycin, and a 4-log10 reduction was achieved in the clarithromycin experiments, while no intracellular effect was seen when amoxicillin was used. The antibiotic concentrations at the sampling intervals were 12.5, 3.1, 0.8, 0.2, 0.05, and 0 mg/liter for amoxicillin; 12.5, 11.5, 10, 9, 8, and 3 mg/liter for azithromycin; and 2.4, 1.8, 1.4, 1, 0.8, and 0 mg/liter for clarithromycin. This new model for pharmacokinetic studies provides a useful tool, with applications for a broad range of microorganisms.
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Affiliation(s)
- K Hultén
- Department of Clinical Microbiology, University Hospital, Uppsala, Sweden
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37
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Fuchs PC, Barry AL. Interpretive criteria for susceptibilities of Haemophilus influenzae to ampicillin, amoxicillin, and amoxicillin-clavulanic acid. J Clin Microbiol 1994; 32:2846-50. [PMID: 7852584 PMCID: PMC264172 DOI: 10.1128/jcm.32.11.2846-2850.1994] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
One hundred fifty isolates of Haemophilus influenzae (including 30 beta-lactamase-positive strains and 23 beta-lactamase-negative, ampicillin-resistant strains) were tested for susceptibilities to ampicillin, amoxicillin, and amoxicillin-clavulanic acid (A/C) by the broth microdilution method in Haemophilus test medium (HTM) and in Mueller-Hinton medium with lysed horse blood and by the disk diffusion method on HTM agar. Our results support the use of HTM for susceptibility testing of H. influenzae but raise a number of questions regarding the interpretive criteria currently in use, particularly with respect to the fourfold difference in MIC susceptibility breakpoints for ampicillin and A/C and a resulting high proportion of A/C-susceptible beta-lactamase-negative, ampicillin-resistant strains.
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Affiliation(s)
- P C Fuchs
- Department of Pathology, St. Vincent Hospital & Medical Center, Portland, OR 97225
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Akimoto Y, Mochizuki Y, Uda A, Omata H, Shibutani J, Nishimura H, Komiya M, Kaneko K, Fujii A. Amoxicillin concentration in pus from abscess caused by odontogenic infection. GENERAL PHARMACOLOGY 1994; 25:111-3. [PMID: 8026696 DOI: 10.1016/0306-3623(94)90019-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
1. Amoxicillin concentration in pus from odontogenic infection was assayed and the concentrations were compared with MIC (minimum inhibitory concentration) of alpha-hemolytic streptococci isolated from odontogenic infection. 2. Measurable amoxicillin concentrations in serum and pus were found in all instances (n = 16). 3. The mean peak concentrations in serum and pus were found at identical times, 1.5 hr after administration, which were 5.92 and 0.90 micrograms/ml, respectively. 4. The mean concentration ratio of pus/serum at the peak time was 0.15. 5. All amoxicillin concentrations in pus at the peak time exceeded the MIC for 90% of alpha-hemolytic streptococci (0.25 micrograms/ml).
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Affiliation(s)
- Y Akimoto
- Department of Oral Surgery, Nihon University School of Dentistry at Matsudo, Chiba, Japan
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39
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Fuchs PC, Barry AL, Pfaller MA, Hardy DJ, McLaughlin JC, Gerlach EH. In vitro activity of ampicillin, amoxicillin, ampicillin-sulbactam, and amoxicillin-clavulanic acid against consecutive clinical isolates of Enterobacteriaceae. Diagn Microbiol Infect Dis 1993; 17:171-5. [PMID: 8243040 DOI: 10.1016/0732-8893(93)90030-b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Ampicillin was generally twice as active as amoxicillin against 2440 consecutive isolates of Enterobacteriaceae from five medical centers. When beta-lactamase inhibitors were added to the penicillins, there was a significant increase in susceptibility. The magnitude of the increased susceptibility to ampicillin-sulbactam (A-S) and amoxicillin-clavulanic (A-C) acid varied with the species and types of beta-lactamases elaborated. Although cross-susceptibility and cross-resistance between ampicillin and amoxicillin was nearly complete, major differences were documented between A-S and A-C with 6.7% of our consecutive isolates of Enterobacteriaceae. The clinical significance of these findings remains uncertain, but they may help explain some of the discrepancies occasionally observed by clinical microbiologists with the combination drugs.
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Affiliation(s)
- P C Fuchs
- St. Vincent Hospital and Medical Center, Portland, OR 97225
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40
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Abstract
The use of ampicillin and amoxicillin remains a mainstay of urologic prophylaxis and therapy, however ampicillin's effectiveness against aerobic gram-negative bacilli, especially Escherichia coli has steadily decreased over time due to increasing beta-lactamase-induced resistance. Presently, up to 40-60 percent of E. coli may be ampicillin resistant. Since there have been no major resistance problems with enterococci, ampicillin remains the preferred anti-enterococcal antibiotic in penicillin-tolerant patients. Ampicillin/beta-lactamase inhibitor combinations are preferred when penicillins are used to treat ampicillin resistant aerobic gram-negative bacillary urinary tract infections (UTIs). One response to the problem of resistance has been short-course or single-dose therapy for uncomplicated cystitis in immunocompetent adults, which is less likely to cause side effects, bacterial resistance, or alterations in bowel flora. Another response has been to combine the aminopenicillins with beta-lactamase inhibitors such as clavulanate or sulbactam.
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Affiliation(s)
- B A Cunha
- Infectious Disease Division, Winthrop-University Hospital, Mineola, New York
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41
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Todd PA, Benfield P. Amoxicillin/clavulanic acid. An update of its antibacterial activity, pharmacokinetic properties and therapeutic use. Drugs 1990; 39:264-307. [PMID: 2184003 DOI: 10.2165/00003495-199039020-00008] [Citation(s) in RCA: 119] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Clavulanic acid enhances the antibacterial spectrum of amoxicillin by rendering most beta-lactamase-producing isolates susceptible to the drug. In clinical trials amoxicillin/clavulanic acid is clinically and bacteriologically superior to amoxicillin alone and at least as effective as numerous other comparative agents, such as orally administered cephalosporins, cotrimoxazole, doxycycline and bacampicillin, in the treatment of adults and children with the most common forms of infection encountered in general practice, i.e. urinary tract infections, upper and lower respiratory tract infections, otorhinolaryngological infections, and skin and soft tissue infections. It may also provide effective treatment for uncomplicated gonorrhoea, chancroid and gynaecological infections as well as acting as a prophylactic agent against surgical infection. Thus, in general practice environments where beta-lactamase production has restricted the effectiveness of amoxicillin, the combination of clavulanic acid with amoxicillin has clearly extended the usefulness of a tried and proven first-line antibacterial agent.
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Affiliation(s)
- P A Todd
- ADIS Drug Information Services, Auckland, New Zealand
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42
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Affiliation(s)
- P G Welling
- Warner-Lambert/Parke-Davis Research Division, Ann Arbor, Michigan 48105
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43
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44
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45
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Tanrisever B, Santella PJ. Cefadroxil. A review of its antibacterial, pharmacokinetic and therapeutic properties in comparison with cephalexin and cephradine. Drugs 1986; 32 Suppl 3:1-16. [PMID: 3542485 DOI: 10.2165/00003495-198600323-00003] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Cefadroxil is an oral cephalosporin which is similar to cephalexin and cephradine in structure and spectrum of antibacterial activity, but has different pharmacokinetic properties. Not only does cefadroxil exhibit a longer serum half-life, and thus a prolonged duration of activity, but it is virtually unaffected by simultaneous food intake. The concentrations of cefadroxil attained in body tissues and fluids are also higher and more sustained than those of cephalexin and cephradine. These characteristics permit the administration of cefadroxil during meals on a once-daily or twice-daily basis, thus encouraging patient compliance which often determines the successful management of out-patient infections. Many studies have established the efficacy of the administration of once- or twice-daily cefadroxil, compared with regimens of cephalexin or cephradine given 4 times daily, in the management of infections in the respiratory tract, urinary tract, skin and soft tissues, and bones and joints.
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Weber DJ, Tolkoff-Rubin NE, Rubin RH. Amoxicillin and potassium clavulanate: an antibiotic combination. Mechanism of action, pharmacokinetics, antimicrobial spectrum, clinical efficacy and adverse effects. Pharmacotherapy 1984; 4:122-36. [PMID: 6739312 DOI: 10.1002/j.1875-9114.1984.tb03333.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The combination of amoxicillin and potassium clavulanate will soon be marketed in 2:1 and 4:1 fixed ratio dosage forms. In vitro and in vivo evidence suggests that clavulanic acid, a potent inhibitor of many bacterial beta-lactamase enzymes, will increase the spectrum of amoxicillin to include, at achievable serum concentrations, Haemophilus influenzae, H. ducreyi, Neisseria gonorrhoeae, Staphylococcus aureus and Branhamella catarralis and, at achievable urine levels, many beta-lactamase-producing strains of E. coli, Klebsiella, Proteus and Citrobacter. Both amoxicillin and clavulanic are well absorbed after oral administration, reach peak serum levels in 40-120 min and have similar half-lives of 45 to 90 min. This combination will be suitable for the treatment of complicated urinary tract infections, otitis media, sinusitis and respiratory tract infections. However, precise recommendations for its use will need to await further clinical trials that compare amoxicillin/clavulanate to alternative therapies.
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McCracken GM. A comparison of the pharmacokinetics of bacampicillin, ampicillin, amoxicillin, and cyclacillin: oral administration in infants and children. BULLETIN OF THE NEW YORK ACADEMY OF MEDICINE 1983; 59:468-76. [PMID: 6576831 PMCID: PMC1911665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Akimoto Y, Kaneko K, Tamura T. Amoxicillin concentrations in serum, jaw cyst, and jawbone following a single oral administration. J Oral Maxillofac Surg 1982; 40:287-93. [PMID: 6953178 DOI: 10.1016/0278-2391(82)90220-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Forty-four patient who underwent enucleation of jaw cysts were administered amoxicillin preoperatively. Specimens of venous blood (44), walls and fluids from periodontal (31) and dentigerous (13) cysts, and jawbone (26) were obtained during the operation and assayed for amoxicillin content. Measurable concentrations were found in all specimens. The levels were higher in periodontal cysts than in dentigerous cysts, and higher in maxillary bone than in mandibular bone. Since amoxicillin can easily and rapidly pass through the epithelial lining according to the change in concentration, the penetration by amoxicillin of blood/cyst wall/cyst fluid probably depends on simple diffusion.
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