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https://www.readbyqxmd.com/read/27912884/synergism-of-coumarins-from-the-chinese-drug-zanthoxylum-nitidum-with-antibacterial-agents-against-methicillin-resistant-staphylococcus-aureus-mrsa
#1
Guo-Ying Zuo, Chun-Juan Wang, Jun Han, Yu-Qing Li, Gen-Chun Wang
BACKGROUND: Methicillin-resistant Staphylococcus aureus (MRSA) poses a serious therapeutic challenge in current clinic and new drug development. Natural coumarins have diverse bioactivities and the potential of resistance modifying effects. PURPOSE: This study is to present in-depth evaluations of in vitro antimicrobial activities of four natural coumarins 5-geranyloxy-7-methoxycoumarin (Gm, 1), (5,7-dimethoxy-8-prenyloxycoumarin (artanin, Ar, 2)), isopimpinellin (Is, 3) and phellopterin (Ph, 4) from Zanthoxylum nitidum (Roxb...
December 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27908268/synthesis-of-new-fluoro-benzimidazole-derivatives-as-an-approach-towards-the-discovery-of-novel-intestinal-antiseptic-drug-candidates
#2
Ulviye Acar, Begüm Nurpelin Sağlık, Yusuf Özkay, Zerrin Cantürk, Juan Bueno, Fatih Demirci
In the present study, nineteen new fluoro-benzimidazole derivatives, including nifuroxazide analogues, were synthesized by microwave-supported reactions and tested against a panel of pathogenic microorganisms consisting of resistant strains. The synthesized compounds were characterised and identified by FT-IR, 1H- and 13C-NMR, mass spectroscopy, and elemental analyses, respectively. In vitro antimicrobial and cytotoxic effects of the synthesized compounds were determined by microdilution and by [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] (MTT) assay...
December 1, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27907048/chemical-defence-in-a-millipede-evaluation-and-characterization-of-antimicrobial-activity-of-the-defensive-secretion-from-pachyiulus-hungaricus-karsch-1881-diplopoda-julida-julidae
#3
Slaviša Stanković, Ivica Dimkić, Ljubodrag Vujisić, Sofija Pavković-Lučić, Zvezdana Jovanović, Tatjana Stević, Ivana Sofrenić, Bojan Mitić, Vladimir Tomić
The chemical defence of the millipede Pachyiulus hungaricus is reported in the present paper, in which a chemical characterization is given and antimicrobial activity is determined. In total, independently of sex, 44 compounds were identified. All compounds belong to two groups: quinones and pentyl and hexyl esters of long-chain fatty acids. The relative abundances of quinones and non-quinones were 94.7% vs. 5.3% (males) and 87.3% vs. 12.7% (females), respectively. The two dominant quinones in both sexes were 2-methyl-1,4,-benzoquinone and 2-methoxy-3-methyl-1,4-benzoquinone...
2016: PloS One
https://www.readbyqxmd.com/read/27903459/true-rifampicin-resistance-missed-by-the-mgit-prevalence-of-this-pheno-genotype-in-the-uk-and-ireland-after-18-month-surveillance
#4
Ximena Gonzalo, Pauline Claxton, Tim Brown, Lorraine Montgomery, Margaret Fitzgibbon, Ian Laurenson, Francis Drobniewski
OBJECTIVES: To characterise rifampicin resistant strains missed by the MGIT 960 system but not by egg-based media in the UK and Ireland and to ascertain their prevalence. METHODS: All strains sent for second line susceptibility testing were prospectively collected. Drug Susceptibility Testing was performed by Resistance Ratio (RR), Proportion Method (PM), MGIT 960 and MIC determination by microdilution. Rifampicin resistance conferring mutations were detected with line probe assays and sequencing...
November 26, 2016: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/27891157/the-in-vitro-antimicrobial-effects-of-lavandula-angustifolia-essential-oil-in-combination-with-conventional-antimicrobial-agents
#5
Stephanie de Rapper, Alvaro Viljoen, Sandy van Vuuren
The paper focuses on the in vitro antimicrobial activity of Lavandula angustifolia Mill. (lavender) essential oil in combination with four commercial antimicrobial agents. Stock solutions of chloramphenicol, ciprofloxacin, nystatin, and fusidic acid were tested in combination with L. angustifolia essential oil. The antimicrobial activities of the combinations were investigated against the Gram-positive bacterial strain Staphylococcus aureus (ATCC 6538) and Gram-negative Pseudomonas aeruginosa (ATCC 27858) and Candida albicans (ATCC 10231) was selected to represent the yeasts...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/27870138/promise-of-combining-antifungal-agents-in-denture-adhesives-to-fight-candida-species-infections
#6
Jorge L Garaicoa, Carol L Fischer, Amber M Bates, Julie Holloway, Gustavo Avila-Ortiz, Janet M Guthmiller, Georgia K Johnson, Clark Stanford, Kim A Brogden
PURPOSE: Several complications may arise in patients wearing complete prosthetic appliances, including denture-associated infections and mucosal stomatitis due to Candida species. This study evaluated the activity of anti-Candida agents in denture adhesive and the cytotoxicities of these preparations for primary human gingival epithelial (GE) keratinocytes. MATERIALS AND METHODS: The anti-Candida activities of antimicrobial peptides, antimicrobial lipids, and antifungal agents against C...
November 21, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/27856302/anti-inflammatory-activity-of-vismia-guianensis-aubl-pers-extracts-and-antifungal-activity-against-sporothrix-schenckii
#7
A H Oliveira, G G de Oliveira, F Carnevale Neto, D F Portuondo, A Batista-Duharte, I Z Carlos
ETHNOPHARMACOLOGICAL RELEVANCE: Vismia guianensis (Aubl.) Pers. is traditionally used in North and Northeast of Brazil for the treatment of dermatomycoses. Since the strategy associating immunomodulators with antifungal drugs seems to be promissory to improve the treatment efficacy in fungal infections, we aimed to investigate the antifungal activity of V. guianensis ethanolic extract of leaves (VGL) and bark (VGB) against Sporothrix schenckii ATCC 16345 and their antinflammatory activities...
November 14, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27842527/pharmacological-effects-of-the-phytochemicals-of-anethum-sowa-l-root-extracts
#8
Md Moshfekus Saleh-E-In, Nasim Sultana, Md Nur Hossain, Sayeema Hasan, Md Rabiul Islam
BACKGROUND: Anethum sowa L. is widely used as an important spice and traditional medicinal plants to treat various ailments. On the basis of scientific ethnobotanical information, this study was undertaken to evaluate the antioxidant, antimicrobial and cytotoxic activity of the crude extracts of Anethum sowa L. roots as well as to identify the classes of phytochemicals by chemical tests. METHODS: The antioxidant potential of the extracts was ascertained with the stable organic free radical (2, 2-diphenyl-1-picryl-hydrazyl)...
November 14, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27827926/assessment-of-chemical-impact-of-invasive-bryozoan-pectinatella-magnifica-on-the-environment-cytotoxicity-and-antimicrobial-activity-of-p-magnifica-extracts
#9
Peter Kollar, Karel Šmejkal, Hana Salmonová, Eva Vlková, Olga Lepšová-Skácelová, Zuzana Balounová, Josef Rajchard, Josef Cvačka, Libor Jaša, Pavel Babica, Jiří Pazourek
Pectinatella magnifica, an invasive bryozoan, might significantly affect ecosystem balance due to its massive occurrence in many areas in Europe and other parts of the world. Biological and chemical analyses are needed to get complete information about the impact of the animal on the environment. In this paper, we aimed to evaluate in vitro cytotoxic effects of five extracts prepared from P. magnifica using LDH assay on THP-1 cell line. Antimicrobial activities of extracts against 22 different bacterial strains were tested by microdilution method...
November 4, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27816906/in-vitro-susceptibility-of-the-oomycete-pythium-insidiosum-to-metallic-compounds-containing-cadmium-lead-copper-manganese-or-zinc
#10
Tatiana Corrêa Ribeiro, Carla Weiblen, Sônia de Avila Botton, Daniela Isabel Brayer Pereira, Francielli Pantella Kunz de Jesus, Camila Marina Verdi, Leticia Trevisan Gressler, Luís Antonio Sangioni, Janio Morais Santurio
Pythium insidiosum is an aquatic oomycete that causes pythiosis, an important and severe disease of difficult treatment that affects humans, domestic and wild animals. This infection is often described in horses in Brazil and humans in Thailand. In clinical practice, we have observed many cases that do not respond to available therapies, indicating the need to explore alternative therapeutic approaches. In this sense, studies using metal compounds in conjunction with available antimicrobial agents have been demonstrated greater antimicrobial activity...
November 5, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/27801287/designing-synthesis-and-antimicrobial-action-of-oxazoline-and-thiazoline-derivatives-of-fatty-acid-esters
#11
Anis Ahmad, Aiman Ahmad, Raja Sudhakar, Himani Varshney, Naidu Subbarao, Saba Ansari, Abdul Rauf, Asad U Khan
In this study, a novel series of oxazoline and thiazoline were designed as inhibitors of cytochrome P450 14 alpha-sterol demethylase (CYP51) from Candida albicans and peptide deformylase of Escherichia coli. The long chain dibromo derivative of fatty acid esters on reaction with urea and thiourea gave their corresponding oxazolines and thiazolines respectively. All the compounds were characterized by their spectral data (IR, (1)H NMR, (13)C NMR and MS) and tested for antibacterial and antifungal activity by disk diffusion assay and minimum inhibitory concentration (MIC) by the broth microdilution method against Gram-positive and Gram-negative strains of bacteria as well as fungus strains...
November 1, 2016: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/27793962/incfiik-plasmid-harbouring-an-amplification-of-16s-rrna-methyltransferase-encoding-gene-rmth-associated-with-mobile-element-iscr2
#12
Racha Beyrouthy, Frederic Robin, Monzer Hamze, Richard Bonnet
OBJECTIVES: To investigate the resistance mechanisms and genetic support underlying the high resistance level of the Klebsiella pneumoniae strain CMUL78 to aminoglycoside and β-lactam antibiotics. METHODS: Antibiotic susceptibility was assessed by the disc diffusion method and MICs were determined by the microdilution method. Antibiotic resistance genes and their genetic environment were characterized by PCR and Sanger sequencing. Plasmid contents were analysed in the clinical strain and transconjugants obtained by mating-out assays...
October 28, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27774426/antibacterial-and-antibiotic-potentiating-activity-of-vangueria-madagascariensis-leaves-and-ripe-fruit-pericarp-against-human-pathogenic-clinical-bacterial-isolates
#13
M Fawzi Mahomoodally, Schajeed Dilmohamed
This study aimed to assess the antibacterial and antibiotic potentiating property of Vangueria madagascariensis (VM) (fruit and leaf extracts) against 10 clinical isolates. A microdilution broth susceptibility assay for bacteria was used for the determination of the minimum inhibitory concentration (MIC) and associated with antibiotics to evaluate any synergistic effect. VM extracts were found to potentiate the activity of 3 conventional antibiotics. Chloramphenicol and Ciprofloxacin showed no activity against Acinetobacter spp...
October 2016: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/27766027/capping-agent-dependent-toxicity-and-antimicrobial-activity-of-silver-nanoparticles-an-in-vitro-study-concerns-about-potential-application-in-dental-practice
#14
Karolina Niska, Narcyz Knap, Anna Kędzia, Maciej Jaskiewicz, Wojciech Kamysz, Iwona Inkielewicz-Stepniak
Objectives: In dentistry, silver nanoparticles (AgNPs) have drawn particular attention because of their wide antimicrobial activity spectrum. However, controversial information on AgNPs toxicity limited their use in oral infections. Therefore, the aim of the present study was to evaluate the antibacterial activities against a panel of oral pathogenic bacteria and bacterial biofilms together with potential cytotoxic effects on human gingival fibroblasts of 10 nm AgNPs: non-functionalized - uncapped (AgNPs-UC) as well as surface-functionalized with capping agent: lipoic acid (AgNPs-LA), polyethylene glycol (AgNPs-PEG) or tannic acid (AgNPs-TA) using silver nitrate (AgNO3) as control...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/27765353/carnosic-acid-acts-synergistically-with-gentamicin-in-killing-methicillin-resistant-staphylococcus-aureus-clinical-isolates
#15
Nicolás M Vázquez, Graciela Fiorilli, Paulo A Cáceres Guido, Silvia Moreno
BACKGROUND: Methicillin-resistant Staphylococcus aureus (MRSA) is resistant to different commonly used antibiotics, stressing the need for further strategies to treat this human pathogen with worldwide prevalence. The use of phytochemicals within the current pharmacology is a promising approach to enhance the antimicrobial activity of common antibiotics in the battle against these bacteria. PURPOSE: The purpose of this study was to determine the antimicrobial effectiveness of carnosic acid, the major constituent of Rosmarinus officinalis L...
November 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27765351/the-anthraquinones-rubiadin-and-its-1-methyl-ether-isolated-from-heterophyllaea-pustulata-reduces-candida-tropicalis-biofilms-formation
#16
Juliana Marioni, María Angel da Silva, José Luis Cabrera, Susana C Núñez Montoya, María Gabriela Paraje
BACKGROUND: Candida tropicalis is increasingly becoming among the most commonly isolated pathogens causing fungal infections with an important biofilm-forming capacity. PURPOSE: This study addresses the antifungal effect of rubiadin (AQ1) and rubiadin 1-methyl ether (AQ2), two photosensitizing anthraquinones (AQs) isolated from Heterophyllaea pustulata, against C. tropicalis biofilms, by studying the cellular stress and antioxidant response in two experimental conditions: darkness and irradiation...
November 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27757368/antifungal-activity-of-dual-combination-of-hydroxychavicol-with-commercialized-agents-against-oral-candida-species
#17
Wan Harun Himratul-Aznita, Che Omran Nor-Zulaila, Khairuddin Nurul-Fatihah
Candida spp. is the most prevalent species causing systemic fungal infections. The effect of antifungal agents were screened in vitro and their synergism effect were determined between hydroxychavicol (HC) in association with commercialized antifungal drugs-amphotericin B (AMB), and 5-fluorocytosine (5-FC) alone and in combination against five different oral Candida spp. in their planktonic states at different ratio (1:1 v/v; 1:2 v/v and 2:1 v/v). In vitro susceptibilities of Candida spp. to HC and commercialized antifungal agents were investigated by broth microdilution method as described by Clinical and Laboratory Standards Institute M38-A2...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27746731/antimicrobial-activity-phenolic-content-and-cytotoxicity-of-medicinal-plant-extracts-used-for-treating-dermatological-diseases-and-wound-healing-in-kwazulu-natal-south-africa
#18
Shanaz Ghuman, Bhekumthetho Ncube, Jeffrey F Finnie, Lyndy J McGaw, Roger M Coopoosamy, Johannes Van Staden
Medicinal plants used for wound healing and skin diseases are the key to unlocking the doors to combating problematic skin diseases as resistance of pathogens to pharmaceuticals and allopathic management continues to increase. The study aimed at investigating the antimicrobial efficacies, phenolic content, and cytotoxicity effects of 11 medicinal plant extracts commonly used for treating skin conditions and wound healing in traditional medicine within KwaZulu-Natal. Eleven plant species were separated into different plant parts (bulbs, roots, leaves) and extracted with different solvents...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27743771/anticandidal-synergistic-activity-of-green-tea-catechins-antimycotics-and-copper-sulphate-as-a-mean-of-combinational-drug-therapy-against-candidiasis
#19
J Anand, N Rai
The present investigation aims at evaluating synergistic herbal based composition of purified catechins with fluconazole, amphotericin B and copper sulphate against Candida albicans (MTCC 3017) and Candida glabrata (MTCC 3019). The catechins were isolated from green tea leaves of Assam, Himachal Pradesh and Uttarakhand regions of India. The synergistic activity of combinations against Candida species was assessed following microdilution checkerboard technique and time kill assay. The inhibitory action of most significant combination on treated Candida cells was assessed by scanning electron microscopy...
October 12, 2016: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/27737336/synergistic-activity-of-doped-zinc-oxide-nanoparticles-with-antibiotics-ciprofloxacin-ampicillin-fluconazole-and-amphotericin-b-against-pathogenic-microorganisms
#20
Neha Sharma, Savita Jandaik, Sanjeev Kumar
Combination therapy of antibiotics and nanoparticles can be used against multi drug resistant microorganisms. Nanoparticles (NPs) have been reported to show antimicrobial activity. The antimicrobial activities of doped ZnO nanoparticles (ZnO NPs) were studied against fungi, gram-positive and gram-negative bacteria using the standard microdilution method. The interaction between the nanoparticle and the antibiotic was estimated by calculating the fractional inhibitory concentration (FIC index) of the combination through checkerboard assay...
2016: Anais da Academia Brasileira de Ciências
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