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https://www.readbyqxmd.com/read/28802173/fungicidal-activity-of-copper-sputtered-flexible-surfaces-under-dark-and-actinic-light-against-azole-resistant-candida-albicans-and-candida-glabrata
#1
Myriam K S Ballo, Sami Rtimi, John Kiwi, César Pulgarin, José M Entenza, Alain Bizzini
Candida spp. are able to survive on hospital surfaces and causes healthcare-associated infections (HCAIs). Since surface cleaning and disinfecting interventions are not totally effective to eliminate Candida spp., new approaches should be devised. Copper (Cu) has widely recognized antifungal activity and the use of Cu-sputtered surfaces has recently been proposed to curb the spread of HCAIs. Moreover, the activity of Cu under the action of actinic light remains underexplored. We investigated the antifungal activity of Cu-sputtered polyester surfaces (Cu-PES) against azole-resistant Candida albicans and Candida glabrata under dark and low intensity visible light irradiation (4...
July 29, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28795887/cold-atmospheric-pressure-plasmas-exhibit-antimicrobial-properties-against-critical-bacteria-and-yeast-species
#2
C Wiegand, S Fink, U-C Hipler, O Beier, K Horn, A Pfuch, A Schimanski, B Grünler
OBJECTIVE: Cold atmospheric pressure plasmas (CAPPs) have been used to sterilise implant materials and other thermally unstable medical products and to modify chemical surfaces. This study investigates the antimicrobial effect of the gas and input power used to generate CAPPs on microorganisms causing skin infections, such as Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans and Malassezia pachydermatis. METHOD: Microorganisms were cultivated on Mueller Hinton 2 (MH2) agar plates...
August 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28795782/variation-on-composition-and-bioactivity-of-essential-oils-of-four-common-curcuma-herbs
#3
Lanyue Zhang, Zhiwen Yang, Dingkang Chen, Zebin Huang, Yongliang Li, Xinzi Lan, Ping Su, Wanyi Pan, Wei Zhou, Xi Zheng, Zhiyun Du
Chemical compositions, antioxidative, antimicrobial, anti-inflammatory and cytotoxic activities of essential oils extracted from four common Curcuma species (Curcuma longa, Curcuma phaeocaulis, Curcuma wenyujin and Curcuma kwangsiensis) rhizomes in China are comparatively studied. In total, 47, 49, 35 and 30 compounds are identified in C. longa, C. phaeocaulis, C. wenyujin and C. kwangsiensis essential oils by GC-MS, and their richest compounds are ar-turmerone (21.67%), elemenone (19.41%), curdione (40.23%) and (36...
August 10, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28779997/the-bacterial-species-associated-with-aspirated-foreign-bodies-in-children
#4
Maayan Gruber, Graeme van Der Meer, Benjamin Ling, Colin Barber, Nikki Mills, Michel Neeff, Lesley Salkeld, Murali Mahadevan
OBJECTIVE: Inhaled foreign bodies in children are common and may be complicated by secondary airway tract infection. The inhaled foreign body may act as carrier of infectious material and the aim of this study was to explore the bacterial species associated with aspirated foreign bodies in a cohort of children. METHODS: Retrospective case series of 34 patients who underwent rigid laryngobronchoscopy because of foreign body aspiration. Each patient had a sample taken from tracheobronchial secretions during the procedure...
August 2, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28774774/saccharomyces-cerevisiae-ktr4-ktr5-and-ktr7-encode-mannosyltransferases-differentially-involved-in-the-n-and-o-linked-glycosylation-pathways
#5
Nahúm V Hernández, Luz A López-Ramírez, Diana F Díaz-Jiménez, Erika Mellado-Mojica, Iván Martínez-Duncker, Mercedes G López, Héctor M Mora-Montes
Saccharomyces cerevisiae is a model to understand basic aspects of protein glycosylation pathways. Although these metabolic routes have been thoroughly studied, there are still knowledge gaps; among them, the role of the MNT1/KRE2 gene family. This family is composed of nine members, with only six functionally characterized. The enzymes Ktr1, Ktr3, and Mnt1/Kre2 have overlapping activities in both O-linked and N-linked glycan synthesis; while Ktr2 and Yur1 participate exclusively in the elongation of the N-linked glycan outer chain...
July 31, 2017: Research in Microbiology
https://www.readbyqxmd.com/read/28772718/the-relationship-between-the-mechanism-of-zinc-oxide-crystallization-and-its-antimicrobial-properties-for-the-surface-modification-of-surgical-meshes
#6
Marta Fiedot, Irena Maliszewska, Olga Rac-Rumijowska, Patrycja Suchorska-Woźniak, Agnieszka Lewińska, Helena Teterycz
Surgical meshes were modified with zinc oxide (ZnO) using a chemical bath deposition method (CBD) at 50 °C, 70 °C, or 90 °C, in order to biologically activate them. Scanning electron microscopy (SEM), mass changes, and X-ray diffraction measurements revealed that at low temperatures Zn(OH)₂ was formed, and that this was converted into ZnO with a temperature increase. The antimicrobial activity without light stimulation of the ZnO modified Mersilene™ meshes was related to the species of microorganism, the incubation time, and the conditions of the experiment...
March 28, 2017: Materials
https://www.readbyqxmd.com/read/28769876/candida-albicans-the-ability-to-invade-epithelial-cells-and-survive-under-oxidative-stress-is-unlinked-to-hyphal-length
#7
Paloma K Maza, Alexis Bonfim-Melo, Ana C B Padovan, Renato A Mortara, Cristina M Orikaza, Lilian M Damas Ramos, Tauany R Moura, Frederico M Soriani, Ricardo S Almeida, Erika Suzuki, Diana Bahia
In its hyphal form, Candida albicans invades epithelial and endothelial cells by two distinct mechanisms: active penetration and induced endocytosis. The latter is dependent on a reorganization of the host cytoskeleton (actin/cortactin recruitment), whilst active penetration does not rely on the host's cellular machinery. The first obstacle for the fungus to reach deep tissues is the epithelial barrier and this interaction is crucial for commensal growth, fungal pathogenicity and host defense. This study aimed to characterize in vitro epithelial HeLa cell invasion by four different isolates of C...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28769001/selected-physicochemical-and-biological-properties-of-ethyl-ascorbic-acid-compared-to-ascorbic-acid
#8
Iwona Golonka, Monika Oleksy, Adam Junka, Agnieszka Matera-Witkiewicz, Marzenna Bartoszewicz, Witold Musiał
The aim of the work was the evaluation of selected biological and physicochemical, applicative properties of ethylated ascorbic acid (AAE) compared to ascorbic acid (AA). Thermogravimetry (TG), differential thermogravimetry (DTG), and differential thermal analysis (DTA) were conducted, followed by the evaluation of AAE decomposition by the UV-Vis spectroscopic method including the influence of temperature and pH. Scavenging, antimicrobial activity and cytotoxicity against L929 fibroblasts were also performed...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28767978/biosynthesized-silver-nanoparticles-are-they-effective-antimicrobials
#9
Mudara K Peiris, Chinthika P Gunasekara, Pradeep M Jayaweera, Nuwan Dh Arachchi, Neluka Fernando
BACKGROUND: Silver nanoparticles (AgNPs) are increasingly being used in medical applications. Therefore, cost effective and green methods for generating AgNPs are required. OBJECTIVES: This study aimed towards the biosynthesis, characterisation, and determination of antimicrobial activity of AgNPs produced using Pseudomonas aeruginosa ATCC 27853. METHODS: Culture conditions (AgNO3 concentration, pH, and incubation temperature and time) were optimized to achieve maximum AgNP production...
August 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28764751/the-in-vitro-effects-of-interferon-gamma-alone-or-in-combination-with-amphotericin-b-tested-against-the-pathogenic-fungi-candida-albicans-and-aspergillus-fumigatus
#10
Moufid El-Khoury, Rogine Ligot, Simon Mahoney, Colin M Stack, Gabriel G Perrone, C Oliver Morton
OBJECTIVE: Recent studies into the antifungal activity of NK-cells against the Aspergillus fumigatus have presented differing accounts on their mode of antifungal activity. One of these mechanisms proposed that NK-cells may kill the fungus via the direct effects of exposure to Interferon gamma (IFN-γ). RESULTS: In this study we investigated the direct antifungal effects of recombinant human IFN-γ against a range of pathogenic fungi by measuring cellular damage using an XTT-based assay and cell viability through plate counts...
August 1, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28763100/fungal-derived-cues-promote-ocular-autoimmunity-through-a-dectin-2-card9-mediated-mechanism
#11
Brieanna R Brown, Ellen J Lee, Paige E Snow, Emily E Vance, Yoichiro Iwakura, Naohito Ohno, Noriko Miura, Xin Lin, Gordon D Brown, Christine A Wells, Justine R Smith, Rachel R Caspi, Holly L Rosenzweig
Uveitis (intraocular inflammation) is a leading cause of vision loss. Although its etiology is largely speculative, it is thought to arise from complex genetic-environmental interactions that break immune tolerance to generate eye-specific autoreactive T cells. Experimental autoimmune uveitis (EAU), induced by immunization with the ocular antigen, interphotoceptor retinoid binding protein (IRBP), in combination with mycobacteria-containing CFA, has many clinical and histopathological features of human posterior uveitis...
August 1, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28761643/a-prospective-randomised-trial-of-isolated-pathogens-of-surgical-site-infections-ssi
#12
Konstantinos Alexiou, Ioannis Drikos, Maria Terzopoulou, Nikolaos Sikalias, Argyrios Ioannidis, Nikolaos Economou
BACKGROUND: Every surgical wound is colonized by bacteria, but only a small percentage displays symptoms of infection. The distribution of pathogens isolated in surgical site infections has not significantly changed over the last decades. Staph. Aureus, Coag(-) Staphylococci, Enterococcus spp and E. Coli are the main strains appearing. In addition, a continuously rising proportion of surgical site infections caused by resistant bacterial species (MRSA, C. Albicans) has been reported...
September 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28760935/overexpression-of-candida-albicans-secreted-aspartyl-proteinases-2-or-5-is-not-sufficient-for-exacerbation-of-immunopathology-in-a-murine-model-of-vaginitis
#13
Hubertine M E Willems, Winter S Bruner, Katherine S Barker, Junyan Liu, Glen E Palmer, Brian M Peters
The secreted aspartyl protineases of C. albicans have long been implicated in virulence at the mucosal surface, including contribution to colonization and immunopathogenesis during vulvovaginal candidiasis. In an effort to disentangle hypha-associated virulence factor regulation from morphological transition, the purpose of this study was to determine if overexpression of SAP2 or SAP5 in a efg1Δ/Δ/cph1Δ/Δ mutant could restore capacity to cause immunopathology during murine vaginitis to this avirulent hypofilamentous strain...
July 31, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28759203/structural-and-functional-characterization-of-the-histidine-phosphatase-domains-of-human-sts-1-and-sts-2
#14
Weijie Zhou, Yue Yin, Alexandra S Weinheimer, Neena Kaur, Nick Carpino, Jarrod B French
The suppressor of T-cell signaling (Sts) proteins, Sts-1 and Sts-2, are homologous phosphatases that negatively regulate signaling pathways downstream of the T-cell receptor. Functional inactivation of Sts-1 and Sts-2 in a murine model leads to resistance to systemic infection by the opportunistic pathogen, C. albicans. This suggests that modulation of the host immune response by inhibiting Sts function may be a viable strategy to treat these deadly fungal pathogen infections. To better understand the molecular determinants of function and structure, we characterized the structure and steady-state kinetics of the histidine phosphatase domains of human Sts-1 (Sts-1HP) and Sts-2 (Sts-2HP)...
July 31, 2017: Biochemistry
https://www.readbyqxmd.com/read/28757872/production-characterization-and-antimicrobial-activity-of-mycocin-produced-by-debaryomyces-hansenii-dsmz70238
#15
Safaa A S Al-Qaysi, Halah Al-Haideri, Zaid Akram Thabit, Wijdan Hameed Abd Al-Razzaq Al-Kubaisy, Jamal Abd Al-Rahman Ibrahim
The present study was conducted to estimate the antimicrobial activity and the potential biological control of the killer toxin produced by D. hansenii DSMZ70238 against several pathogenic microorganisms. In this study, the effects of NaCl, pH, and temperature, killer toxin production, and antimicrobial activity were studied. The results showed that the optimum inhibitory effect of killer toxin was at 8% NaCl, and the diameters of clear zones were 20, 22, 22, 21, 14, and 13 mm for Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Streptococcus pyogenes, Candida albicans, and Candida neoformans, respectively...
2017: International Journal of Microbiology
https://www.readbyqxmd.com/read/28756155/formation-of-matricaria-chamomilla-extract-incorporated-ag-nanoparticles-and-size-dependent-enhanced-antimicrobial-property
#16
Esra Dogru, Ayse Demirbas, Berrak Altinsoy, Fatih Duman, Ismail Ocsoy
Various concentrations of Matricaria chamomilla (M. chamomilla) flower extract was used for biosynthesis of Ag NPs with different sizes, 70±5 (Ag NP-1), 52±5 (Ag NP-1) and 37±4nm (Ag NP-3), and size-specific antimicrobial activity of them was evaluated towards Gram+ Staphylococcus aureus (S. aureus), Gram- Escherichia coli (E. coli) bacteria and Candida fungus albicans (C. albicans). We also examine the formation of Ag NPs as a function of the plant extract volume, Ag ion concentration (Ag(+)) and reaction time...
July 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28754462/in-vitro-susceptibility-of-candida%C3%A2-albicans-clinical-isolates-to-eight-antifungal-agents-in-ouagadougou-burkina-faso
#17
A Zida, A Yacouba, S Bamba, I Sangare, M Sawadogo, T Guiguemde, S Kone, L K Traore, R Ouedraogo-Traore, R T Guiguemde
INTRODUCTION: In recent years, the infection Candida albicans infection worldwide has risen, and the incidence of resistance to traditional antifungal therapies is also increasing. The aim of this study was to evaluate in vitro susceptibility of C. albicans clinical isolates to eight antifungal agents in Ouagadougou. MATERIALS AND METHODS: A cross-sectional study was conducted from January 2013 to December 2015 at Yalgado Ouédraogo University Teaching Hospital...
July 25, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28752552/the-two-component-response-regulator-skn7-belongs-to-a-network-of-transcription-factors-regulating-morphogenesis-in-candida-albicans-and-independently-limits-morphogenesis-induced-ros-accumulation
#18
Virginia Basso, Sadri Znaidi, Valentine Lagage, Vitor Cabral, Franziska Schoenherr, Salomé LeibundGut-Landmann, Christophe d'Enfert, Sophie Bachellier-Bassi
Skn7 is a conserved fungal heat shock factor-type transcriptional regulator. It participates in maintaining cell wall integrity and regulates the osmotic/oxidative stress response (OSR) in S. cerevisiae, where it is part of a two-component signal transduction system. Here, we comprehensively address the function of Skn7 in the human fungal pathogen Candida albicans. We provide evidence reinforcing functional divergence, with loss of the cell wall/osmotic stress-protective roles and acquisition of the ability to regulate morphogenesis on solid medium...
July 28, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28752199/thymus-vulgaris-l-and-thymol-assist-murine-macrophages-raw-264-7-in-the-control-of-in-vitro-infections-by-staphylococcus-aureus-pseudomonas-aeruginosa-and-candida-albicans
#19
Jonatas Rafael de Oliveira, Leandro Wagner Figueira, Fábia Lugli Sper, Vanessa Marques Meccatti, Samira Esteves Afonso Camargo, Luciane Dias de Oliveira
Microorganisms are capable to combat defense cells by means of strategies that contribute to their stabilization and proliferation in invaded tissues. Frequently antimicrobial-resistant strains appear; therefore, alternative methods to control them must be investigated, for example, the use of plant products. The capacity of the thyme extract (Thymus vulgaris L.) and phytocompound thymol in the control of in vitro infections by Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans in murine macrophages (RAW 264...
August 2017: Immunologic Research
https://www.readbyqxmd.com/read/28752071/an-in-vitro-ethnopharmacological-study-on-prangos-ferulacea-a-wound-healing-agent
#20
Keyvan Yousefi, Sanaz Hamedeyazdan, Darya Hodaei, Farzaneh Lotfipour, Behzad Baradaran, Mona Orangi, Fatemeh Fathiazad
Introduction: Traditionally Prangos ferulacea root is being used as an effective wound healing agent especially for pus-filled wounds both in human and stocks in the western north of Iran. Regarding the subject we decided to study P. ferulacea roots essential oil (PFE) for its antimicrobial and wound healing activities. Methods: The in vitro wound healing activity of PFE was evaluated in the mouse fibroblast cell line L929 using MTT assay of cell viability and cytotoxicity indices. Scratch assay as an in vitro model of wound healing assay was also conducted in this study...
2017: BioImpacts: BI
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