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Almutairi MS, Jayasheela K, Periandy S, Al-Ghamdi AR, Sebastian S, Xavier S, Kadi AA, Abdelhameed AS, Attia MI. Structural, spectroscopic, Hirshfeld surface and charge distribution analysis of 3-(1H-imidazole-1-yl)-1-phenylpropan-1-ol complemented by molecular docking predictions: An integrated experimental and computational approach. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Mane YD, Sarnikar YP, Surwase SM, Biradar DO, Gorepatil PB, Shinde VS, Khade BC. Design, synthesis, and antimicrobial activity of novel 5-substituted indole-2-carboxamide derivatives. RESEARCH ON CHEMICAL INTERMEDIATES 2016. [DOI: 10.1007/s11164-016-2696-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Zhou Z, Han N, Liu Z, Song Z, Wu P, Shao J, Zhang JM, Yin J. The antibacterial activity of syringopicroside, its metabolites and natural analogues from Syringae Folium. Fitoterapia 2016; 110:20-5. [PMID: 26912454 DOI: 10.1016/j.fitote.2016.02.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 01/27/2016] [Accepted: 02/01/2016] [Indexed: 10/22/2022]
Abstract
In the present study, the in vitro antibacterial activity of an effective fraction (ESF) from Syringae Folium (SF) on Methicillin-resistant Staphylococcus aureus (MRSA) was evaluated and then its in vivo activity was evaluated by using the MRSA-infected mouse peritonitis model. The ESF showed a significant in vitro and in vivo activity on decreasing the Minimum Inhibitory Concentrations (MICs) and increasing the survival rate of mouse from 42.8% to 100%. Six iridoid glucosides (IGs) of ESF were characterized by UPLC-TOF-MS method and also isolated by column chromatography. Most of them showed in vitro anti MRSA activity. Syringopicroside (Sy), the major compound of IGs, was found to increase the survival rate from 42.8% to 92.8% of the MRSA-infected mouse, which revealed Sy is also the main active components of ESF. In order to know why the effect of oral administration of SF is better than its injections in clinic and the metabolites of Sy, seven metabolites of Sy were isolated from rat urine and identified on the basis of NMR and MS spectra. Most of metabolites possessed stronger in vitro anti-MRSA activity than that of Sy, which furtherly proved the clinical result.
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Affiliation(s)
- Zhengyuan Zhou
- Department of Pharmacognosy and Utilization Key Laboratory of Northeast Plant Materials, School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Na Han
- Department of Pharmacognosy and Utilization Key Laboratory of Northeast Plant Materials, School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Zhihui Liu
- Department of Pharmacognosy and Utilization Key Laboratory of Northeast Plant Materials, School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Zehai Song
- Department of Pharmacognosy and Utilization Key Laboratory of Northeast Plant Materials, School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Peng Wu
- Department of Pharmacognosy and Utilization Key Laboratory of Northeast Plant Materials, School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Jingxuan Shao
- Department of Pharmacognosy and Utilization Key Laboratory of Northeast Plant Materials, School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Jia Ming Zhang
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Jun Yin
- Department of Pharmacognosy and Utilization Key Laboratory of Northeast Plant Materials, School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Shenyang 110016, China.
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Tomova I, Stoilova-Disheva M, Lazarkevich I, Vasileva-Tonkova E. Antimicrobial activity and resistance to heavy metals and antibiotics of heterotrophic bacteria isolated from sediment and soil samples collected from two Antarctic islands. FRONTIERS IN LIFE SCIENCE 2015. [DOI: 10.1080/21553769.2015.1044130] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Tyagi S, Tyagi VK. Novel Cationic Gemini Surfactants and Methods for Determination of Their Antimicrobial Activity – Review. TENSIDE SURFACT DET 2014. [DOI: 10.3139/113.110319] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Newly series of Gemini surfactants have emerged which are composed of two hydrophobic tails and two cationic head groups linked by spacer group. Today, these cationic Gemini surfactants are attracting attention of the researchers as these surfactants are more efficient in lowering surface tension as the conventional ones. Cationic Gemini surfactants have lower critical micelle concentrations (CMC) and higher surface tension reduction as compared to those of corresponding monoalkyl ammonium salts. They have wide industrial and household applications. They can be used as emulsifiers, dispersing and anti-foaming agents etc. Cationic Gemini surfactants show good antimicrobial activity against gram-positive and gram-negative bacteria. Antimicrobial activity has also been studied against fungi and yeast species. These cationic Gemini surfactants can be used as antibacterial, antifungal, antiviral agents. This review paper deals with synthesis, antimicrobial activity, methods for determining antimicrobial activity (MIC means minimum inhibitory concentration) and applications of cationic Gemini surfactants.
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Su Y, Ma L, Wen Y, Wang H, Zhang S. Studies of the in vitro antibacterial activities of several polyphenols against clinical isolates of methicillin-resistant Staphylococcus aureus. Molecules 2014; 19:12630-9. [PMID: 25153875 PMCID: PMC6271679 DOI: 10.3390/molecules190812630] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 06/14/2014] [Accepted: 07/30/2014] [Indexed: 11/16/2022] Open
Abstract
In this study, we report the antibacterial activities of six polyphenols (i.e., luteolin, quercetin, scutellarin, apigenin, chlorogenic acid, and resveratrol) against 29 clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA), and in vitro antibacterial activities of two-drug combinations. All of the MRSA strains evaluated were clinical isolates from patients with MRSA bacteremia. The antibacterial activities were determined by agar dilution method, and the two-drug antibacterial activities were determined by the checkerboard agar dilution method. It was found that luteolin, quercetin and resveratrol show obvious antibacterial activities against MRSA, and the results of two-drug antibacterial activity show either synergy or additivity, without evidences of antagonistic effects.
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Affiliation(s)
- Yanli Su
- Department of Infection and Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
| | - Liyan Ma
- Clinical Laboratory Center, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
| | - Yan Wen
- Department of Infection and Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
| | - Hong Wang
- Department of Infection and Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
| | - Shuwen Zhang
- Department of Infection and Critical Care Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
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Synthesis and evaluation of new chalcones, derived pyrazoline and cyclohexenone derivatives as potent antimicrobial, antitubercular and antileishmanial agents. Med Chem Res 2013. [DOI: 10.1007/s00044-013-0803-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Schitter G, Wrodnigg TM. Update on carbohydrate-containing antibacterial agents. Expert Opin Drug Discov 2013; 4:315-56. [PMID: 23489128 DOI: 10.1517/17460440902778725] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Since the first known use of antibiotics > 2,500 years ago, a research field with immense importance for the welfare of mankind has been developed. After a decrease in interest in this topic by the end of the 20th century the occurrence of (poly-)resistant strains of bacteria induced a revival of antibiotics research. Health systems have been seeking viable and reliable solutions to this dangerous and expansive threat. OBJECTIVE This review will focus on carbohydrate-containing antibiotics and will give an outline of recently published novel isolated, semisynthetic as well as synthetic structures, their mechanism of action, if known, and the strategies for the design of compounds with potential by improved antibacterial properties. METHODS The literature between 2000 and 2008 was screened with main focus on recent examples of novel structures and strategies for the lead finding of exclusively antibacterial agents. RESULTS/CONCLUSION With the explanation of the role of the carbohydrate moieties in the respective antibacterial agents together with better synthetic strategies in carbohydrate chemistry as well as improvements in assay development for high throughput screening methods, carbohydrate-containing antibiotics can be used for the finding of potential drug leads that contribute to the fight against infections and diseases caused by (resistant) bacterial pathogens.
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Affiliation(s)
- Georg Schitter
- Technical University Graz, Institute of Organic Chemistry, Univ.-Doz. TMW, Dip.-Ing. GS, Glycogroup, A-8010 Graz, Austria +43 316 873 8744 ; +43 316 873 8740 ;
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Ghumare AK, Pawar BV, Bhagwat SS. Synthesis and Antibacterial Activity of Novel Amido-Amine-Based Cationic Gemini Surfactants. J SURFACTANTS DETERG 2012. [DOI: 10.1007/s11743-012-1406-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Patel RV, Patel JK, Kumari P, Chikhalia KH. Combination of bioactive moieties with different heteroatom(s): Application of the Suzuki cross-coupling reaction. HETEROATOM CHEMISTRY 2012. [DOI: 10.1002/hc.21027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Li P, Li X, Saravanan R, Li CM, Leong SSJ. Antimicrobial macromolecules: synthesis methods and future applications. RSC Adv 2012. [DOI: 10.1039/c2ra01297a] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Özkay Y, Tunalı Y, Karaca H, Işıkdağ İ. Antimicrobial Activity of a New Combination System of Benzimidazole and Various Azoles. Arch Pharm (Weinheim) 2011; 344:264-71. [DOI: 10.1002/ardp.201000172] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Revised: 08/16/2010] [Accepted: 08/20/2010] [Indexed: 11/08/2022]
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Zander J, Hartenfeller M, Hähnke V, Proschak E, Besier S, Wichelhaus T, Schneider G. Multistep Virtual Screening for Rapid and Efficient Identification of Non-Nucleoside Bacterial Thymidine Kinase Inhibitors. Chemistry 2010; 16:9630-7. [DOI: 10.1002/chem.201001347] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Lee DS, Kim YM, Lee MS, Ahn CB, Jung WK, Je JY. Synergistic effects between aminoethyl-chitosans and beta-lactams against methicillin-resistant Staphylococcus aureus (MRSA). Bioorg Med Chem Lett 2009; 20:975-8. [PMID: 20036533 DOI: 10.1016/j.bmcl.2009.12.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2009] [Revised: 11/25/2009] [Accepted: 12/14/2009] [Indexed: 11/16/2022]
Abstract
Two kinds of aminoethyl-chitosans (AEC), AEC90 and AEC50, which had degrees of deacetylation of 90% and 50%, respectively, were prepared and their synergistic effects in combination with beta-lactams including ampicillin, penicillin, and oxacillin against two standard methicillin-resistant Staphylococcus aureus (MRSA) strains and twelve clinical isolated MRSA strains were investigated. When AECs and beta-lactams were combined, synergistic effects were observed with fractional inhibitory concentration (FIC) indices of 0.252-0.508, and the MICs of beta-lactams in the presence of AECs were dramatically reduced.
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Affiliation(s)
- Dae-Sung Lee
- Department of Microbiology, Pukyong National University, Busan 608-737, Republic of Korea
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Stress-responsive systems set specific limits to the overproduction of membrane proteins in Bacillus subtilis. Appl Environ Microbiol 2009; 75:7356-64. [PMID: 19820159 DOI: 10.1128/aem.01560-09] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Essential membrane proteins are generally recognized as relevant potential drug targets due to their exposed localization in the cell envelope. Unfortunately, high-level production of membrane proteins for functional and structural analyses is often problematic. This is mainly due to their high overall hydrophobicity. To develop new concepts for membrane protein overproduction, we investigated whether the biogenesis of overproduced membrane proteins is affected by stress response-related proteolytic systems in the membrane. For this purpose, the well-established expression host Bacillus subtilis was used to overproduce eight essential membrane proteins from B. subtilis and Staphylococcus aureus. The results show that the sigma(W) regulon (responding to cell envelope perturbations) and the CssRS two-component regulatory system (responding to unfolded exported proteins) set critical limits to membrane protein production in large quantities. The identified sigW or cssRS mutant B. subtilis strains with significantly improved capacity for membrane protein production are interesting candidate expression hosts for fundamental research and biotechnological applications. Importantly, our results pinpoint the interdependent expression and function of membrane-associated proteases as key parameters in bacterial membrane protein production.
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Antibacterial activity of aminoderivatized chitosans against methicillin-resistant Staphylococcus aureus (MRSA). Bioorg Med Chem 2009; 17:7108-12. [DOI: 10.1016/j.bmc.2009.09.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Revised: 09/02/2009] [Accepted: 09/03/2009] [Indexed: 11/19/2022]
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Zuo GY, Wang GC, Zhao YB, Xu GL, Hao XY, Han J, Zhao Q. Screening of Chinese medicinal plants for inhibition against clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA). JOURNAL OF ETHNOPHARMACOLOGY 2008; 120:287-290. [PMID: 18804522 DOI: 10.1016/j.jep.2008.08.021] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2008] [Revised: 08/07/2008] [Accepted: 08/20/2008] [Indexed: 05/26/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Traditional herbs are a valuable source of novel antibacterials in combating pathogenic isolates of methicillin-resistant Staphylococcus aureus (MRSA), a global nosocomial problem. AIM OF THE STUDY To assess in vitro anti-MRSA activity of extracts from Chinese herbs. The minimal inhibitory concentrations (MICs) and minimal bactericidal concentrations (MBCs) were determined in the setting of clinical MRSA isolates. MATERIALS AND METHODS A collection of 19 plant extracts were obtained and bioassay-guided phytochemical analysis performed. Antibacterial susceptibilities were screened for inhibitory zone and MICs/MBCs determined by serial dilution with a standardized microdilution broth methodology. 9 MRSA isolates and a standard control strain (ATCC 25923) were cultured and exposed to the plant extract and isolated compound. Vancomycin was used as a positive control agent. RESULTS All the presented 19 plants showed anti-MRSA activity with MIC of 1.25-3.07mg/ml. The most active antimicrobial plants were Dendrobenthamia capitata, Elsholtzia rugulosa, Elsholtzia blanda, Geranium strictipes and Polygonum multiflorum (MIC< or =1.43mg/ml), and betulinic acid isolated from the active ethyl acetate fraction of Dendrobenthamia capitata extract was determined with MIC/MBC values as 62.5/125.0mg/ml. CONCLUSIONS Dendrobenthamia capitata, Elsholtzia rugulosa, Elsholtzia blanda, Geranium strictipesPolygonum multiflorum and betulinic acid demonstrate promising anti-MRSA potential.
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Affiliation(s)
- G Y Zuo
- Research Center for Natural Medicines, Kunming General Hospital, PLA, Kunming, China.
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Shalit I, Low M, Levy E, Chowers M, Zimhony O, Riesenberg K, Bishara J, Raz R. Antibiotic use in 26 departments of internal medicine in 6 general hospitals in Israel: variability and contributing factors. J Antimicrob Chemother 2008; 62:196-204. [PMID: 18400806 DOI: 10.1093/jac/dkn150] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
OBJECTIVES Increased antibiotic consumption is associated with increased bacterial resistance worldwide. We aimed to analyse antibiotic consumption and potential contributory factors in internal medicine departments in Israel. METHODS Data (2003-04) from 26 departments in 6 hospitals were retrieved. Defined daily doses (DDD)/100 bed-days were calculated for total antibiotic use and by antibiotic class. Patterns identified were correlated with 15 patients' and departmental variables by univariate and multivariate analyses. RESULTS Total antibiotic consumption differed by a factor of 2.3 (115 DDD/100 bed-days to 49.1 DDD/100 bed-days) between the highest and lowest consuming departments. Antibiotic classes differed by a factor of 22.8 for macrolides, a factor of 20 for piperacillin/tazobactam, a factor of 17 for carbapenems, a factor of 13.3 for quinolones, a factor of 9 for vancomycin, a factor of 6.8 for amoxicillin/clavulanate, a factor of 6.6 for aminoglycosides, a factor of 5.3 for penicillins and a factor of 2.8 for cephalosporins. Even among departments within hospitals, there was a difference of up to 1.5-fold for total use and antibiotic class differences ranged between 2.5- and 7.2-fold for third- and fourth-generation cephalosporins, despite similar Charlson scores and other patient variables. In the multivariate analysis, hospital affiliation and rate of 1 day hospitalization were the only significant variables predicting total antibiotic use, contributing 43% and 7.3%, respectively, to the variance. By antibiotic class, controlling for hospital affiliation, patients with neutropenia, lower respiratory tract infections and assisted ventilation were the most common significant contributors, ranging from 3.5% for quinolones to 7.7% for piperacillin/tazobactam. CONCLUSIONS Patterns of antibiotic use vary widely among internal medicine departments in Israel, which cannot be explained by objective parameters related either to patients or wards. Ongoing monitoring and guideline formulation are needed to regulate antibiotic prescription.
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Affiliation(s)
- Itamar Shalit
- 'Clalit' Health Services, Hospital Division, Tel Aviv, Israel.
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Al-Muharrmi Z, Rafay A, Balkhair A, Jabri AA. Antibiotic combination as empirical therapy for extended spectrum Beta-lactamase. Oman Med J 2008; 23:78-81. [PMID: 22379542 PMCID: PMC3282419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2007] [Accepted: 02/02/2008] [Indexed: 05/31/2023] Open
Abstract
BACKGROUND extended spectrum β-lactamase (ESBL) producing gram negative bacilli are becoming a growing problem worldwide with difficulties in designing a national formulary for empirical treatment of gram negative sepsis. OBJECTIVES In this study, we investigated the in vitro activity of Carbapenems, Pipracillin-Tazobactam, Ciprofloxacin alone or in combination with aminoglycosides against ESBL-producing strains isolated from clinical samples. METHODS Three hundred and one ESBL-producing Escherichia coli and K. pneumoniae strains isolated from clinical samples were investigated. Isolates were screened initially for ESBL production using an automated system. All ESBL isolates were further confirmed using the double-disk diffusion method. RESULTS The overall Piperacillin-Tazobactam susceptibility was 57.9 (64.4% E. coli and 43.6% Klebsiella pneumoniae). Only 29.6% of ESBLs (24.9% E. coli and 39.6% Klebsiella pneumoniae) were ciprofloxacin susceptible. 98.1% E. coli and 93.1% of Klebsiella pneumoniae were susceptible to Piperacillin-Tazobactam plus Amikacin combination. 73.7% E. coli and 61.4% of Klebsiella pneumoniae were susceptible to Piperacillin-Tazobactam plus Gentamicin combination. 96.7% E. coli and 91.1% of Klebsiella pneumoniae were susceptible to Ciprofloxacin plus Amikacin combination. 41.2% E. coli and 51.5% of Klebsiella pneumoniae were susceptible to Ciprofloxacin plus Gentamicin combination. CONCLUSION ESBLs have high resistance profile against Piperacillin/Tazobactam and Ciprofloxacin. The ESBLs from Oman have similar resistantce pattern as those reported from UK and USA. This resistance decreases when these drugs are combined with Amikacin. All ESBLs are susceptible to Carbapenems. However, carbepenam overuse can lead to emergence of carbapenems resistant gram negative bacilli and ESBLs. Combination of Amikacin plus Piperacillin/Tazobactam is a feasible empirical therapy for ESBLs.
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Affiliation(s)
- Zakariya Al-Muharrmi
- Departments of Microbiology & Immunology, College of Medicine and Health Sciences, Sultan Qaboos University, Al Khod, Oman
| | - Akbar Rafay
- Departments of Microbiology & Immunology, College of Medicine and Health Sciences, Sultan Qaboos University, Al Khod, Oman
| | - Abdullah Balkhair
- Medicine, College of Medicine and Health Sciences, Sultan Qaboos University, Al Khod, Oman
| | - Ali A. Jabri
- Departments of Microbiology & Immunology, College of Medicine and Health Sciences, Sultan Qaboos University, Al Khod, Oman
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Abdel Ghani SB, Weaver L, Zidan ZH, Ali HM, Keevil CW, Brown RC. Microwave-assisted synthesis and antimicrobial activities of flavonoid derivatives. Bioorg Med Chem Lett 2008; 18:518-22. [DOI: 10.1016/j.bmcl.2007.11.081] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2007] [Revised: 11/20/2007] [Accepted: 11/21/2007] [Indexed: 11/28/2022]
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Abstract
The relentless emergence and spread of antimicrobial resistance warrant an increased awareness of the problem and improved coordination and standardisation of surveillance systems, as well as resistance control strategies. Moreover, this underscores the urgent need for new antibiotics active against the emerging resistant pathogens. Ceftobiprole is a new beta-lactam molecule engineered for bactericidal activity against methicillin-resistant staphylococci that also exhibits an extended broad spectrum of activity covering the most clinically important Gram-positive (methicillin-susceptible staphylococci, penicillin-susceptible and -resistant pneumococci, other streptococci and ampicillin-susceptible enterococci) and Gram-negative (Enterobacteriaceae, Pseudomonas aeruginosa, Acinetobacter spp., Haemophilus spp. and Moraxella spp.) pathogens. Results from studies with experimental infections and from clinical trials support a role for ceftobiprole in treating complicated skin and skin structure infections caused by Gram-positive pathogens, including methicillin-resistant staphylococci, and suggest a potential role for this drug in treating other types of serious infection caused by Gram-positive and Gram-negative pathogens.
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Affiliation(s)
- G M Rossolini
- University of Siena & Antimicrobial Resistance Unit, Siena University Hospital, I-53100 Siena, Italy.
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