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https://www.readbyqxmd.com/read/27907120/structural-and-functional-elucidation-of-yeast-lanosterol-14%C3%AE-demethylase-in-complex-with-agrochemical-antifungals
#1
Joel D A Tyndall, Manya Sabherwal, Alia A Sagatova, Mikhail V Keniya, Jacopo Negroni, Rajni K Wilson, Matthew A Woods, Klaus Tietjen, Brian C Monk
Azole antifungals, known as demethylase inhibitors (DMIs), target sterol 14α-demethylase (CYP51) in the ergosterol biosynthetic pathway of fungal pathogens of both plants and humans. DMIs remain the treatment of choice in crop protection against a wide range of fungal phytopathogens that have the potential to reduce crop yields and threaten food security. We used a yeast membrane protein expression system to overexpress recombinant hexahistidine-tagged S. cerevisiae lanosterol 14α-demethylase and the Y140F or Y140H mutants of this enzyme as surrogates in order characterize interactions with DMIs...
2016: PloS One
https://www.readbyqxmd.com/read/27905002/disseminated-candidiasis-in-a-young-previously-healthy-dog-and-review-of-literature
#2
Nicole Willems, Dirk J Houwers, Yvette M Schlotter, Bart Theelen, Teun Boekhout
BACKGROUND: The reports on disseminated candidiasis in dogs so far describe at least one predisposing factor. This case report, however, highlights candidiasis in a dog without any known predisposition. PATIENT: A 1.5-year-old intact female Hovawart dog was presented with subcutaneous nodules and polyuria/polydipsia. An excisional biopsy revealed a chronic pyogranulomatous and necrotizing inflammation with mycotic structures. The patient became febrile and lethargic, and developed lameness...
November 30, 2016: Mycopathologia
https://www.readbyqxmd.com/read/27904401/comparison-of-cultivable-acetic-acid-bacterial-microbiota-in-organic-and-conventional-apple-cider-vinegar
#3
Aleksandra Štornik, Barbara Skok, Janja Trček
Organic apple cider vinegar is produced from apples that go through very restricted treatment in orchard. During the first stage of the process, the sugars from apples are fermented by yeasts to cider. The produced ethanol is used as a substrate by acetic acid bacteria in a second separated bioprocess. In both, the organic and conventional apple cider vinegars the ethanol oxidation to acetic acid is initiated by native microbiota that survived alcohol fermentation. We compared the cultivable acetic acid bacterial microbiota in the production of organic and conventional apple cider vinegars from a smoothly running oxidation cycle of a submerged industrial process...
March 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27904074/prophylactic-effect-of-lactobacillus-pentosus-strain-s-pt84-on-candida-infection-and-gastric-inflammation-in-a-murine-gastrointestinal-candidiasis-model-errata
#4
Toshihiro Maekawa, A Sanae Ishijima, Masayuki Ida, Takayuki Izumo, Yoshiko Ono, Hiroshi Shibata, Shigeru Abe
We previously showed a prophylactic effect of Lactobacillus pentosus strain S-PT84 against oral candidiasis in mice. In the present study, we evaluated the protective effect of S-PT84 against Candida infection of the gastrointestinal tract. As the first step, we used an in vitro assay to compare the inhibitory effects of several lactobacilli (S-PT84 and Lactobacillus pentosus type strain JCM1558(T), Lactobacillus gasseri type strain JCM1131(T) and Lactobacillus casei type strain JCM1134(T)) on mycelial growth of Candida albicans...
2016: Medical Mycology Journal
https://www.readbyqxmd.com/read/27904056/prophylactic-effect-of-lactobacillus-pentosus-strain-s-pt84-on-candida-infection-and-gastric-inflammation-in-a-murine-gastrointestinal-candidiasis-model
#5
Toshihiro Maekawa, A Sanae Ishijima, Masayuki Ida, Takayuki Izumo, Yoshiko Ono, Hiroshi Shibata, Shigeru Abe
We previously showed a prophylactic effect of Lactobacillus pentosus strain S-PT84 against oral candidiasis in mice. In the present study, we evaluated the protective effect of S-PT84 against Candida infection of the gastrointestinal tract. As the first step, we used an in vitro assay to compare the inhibitory effects of several lactobacilli (S-PT84 and Lactobacillus pentosus type strain JCM1558(T), Lactobacillus gasseri type strain JCM1131(T) and Lactobacillus casei type strain JCM1134(T)) on mycelial growth of Candida albicans...
2016: Medical Mycology Journal
https://www.readbyqxmd.com/read/27902418/effects-of-the-glucocorticoid-betamethasone-on-the-interaction-of-candida-albicans-with-human-epithelial-cells
#6
Ágnes Jakab, Selene Mogavero, Toni M Förster, Marina Pekmezovic, Nadja Jablonowski, Viktor Dombrádi, István Pócsi, Bernhard Hube
The glucocorticoid betamethasone (BM) is frequently employed in the clinical practice because of its anti-inflammatory and immunosuppressive properties. In this study, we investigated the effect of BM (1 and 2 mM) on the ability of Candida albicans to adhere to, invade and damage oral, intestinal or vaginal epithelial cells, as well as to elicit cytokine and chemokine release. BM at 2 mM concentration stimulated adherence of C. albicans to vaginal cells and facilitated the invasion of intestinal and vaginal epithelia without influencing the growth rate of invading C...
October 20, 2016: Microbiology
https://www.readbyqxmd.com/read/27902197/three-novel-ascomycetous-yeast-species-of-the-kazachstania-clade-kazachstania-saulgeensis-sp-nov-kazachstania-serrabonitensis-sp-nov-and-kazachstania-australis-sp-nov-reassignement-of-candida-humilis-to-kazachastania-humilis-f-a-comb-nov-and-candida-pseudohumilis
#7
Noémie Jacques, Véronique Sarilar, Charlotte Urien, Mariana R Lopes, Camila G Morais, Ana Paula T Uetanabaro, Colin R Tinsley, Carlos A Rosa, Delphine Sicard, Serge Casaregola
Five ascosporogenous yeast strains related to the genus Kazachstania were isolated. Two strains (CLIB 1764T and CLIB 1780) were isolated from French sourdoughs; three others (UFMG-CM-Y273T, UFMG-CM-Y451 and UFMG-CM-Y452) were from rotting wood in Brazil. The sequences of the French and Brazilian strains differed by one and three substitutions, respectively in the D1/D2 LSU rRNA gene and the ITS. The D1/D2 LSU rRNA sequence of these strains differed by 0.5% and 0.7% from Kazachstania exigua, but their ITS sequences diverged by 8...
October 12, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27896598/bacterial-and-fungal-biofilm-formation-on-anodized-titanium-alloys-with-fluorine
#8
Concepcion Perez-Jorge, Maria-Angeles Arenas, Ana Conde, Juan-Manuel Hernández-Lopez, Juan-Jose de Damborenea, Steve Fisher, Alessandra M Agostinho Hunt, Jaime Esteban, Garth James
Orthopaedic device-related infections are closely linked to biofilm formation on the surfaces of these devices. Several modified titanium (Ti-6Al-4V) surfaces doped with fluorine were studied in order to evaluate the influence of these modifications on biofilm formation by Gram-positive and Gram-negative bacteria as well as a yeast. The biofilm studies were performed according to the standard test method approved by ASTM (Designation: E2196-12) using the Rotating Disk Reactor. Four types of Ti-6Al-4V samples were tested; chemically polished (CP), two types of nanostructures containing fluorine, nanoporous (NP) and nanotubular (NT), and non-nanostructured fluorine containing samples (fluoride barrier layers, FBL)...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27894405/inhibition-of-matrix-metalloproteins-9-attenuated-candida-albicans-induced-inflammation-in-mouse-cornea
#9
C Dong, M G Yang
Since the severe corneal ulceration of mouse cornea is known to occur with inflammation. As one of imperative matrix metalloproteinase, the potential roles of matrix metalloproteins 9 (MMP9) in corneal ulceration and keratitis are still unveiled caused by fungal invasion. In this study, Candida albicans (CA) inoculated wild-type KM mice cornea was used as a model pathogen in corneal inflammation.  CA invasion significantly stimulated the expression of collagen IV and MMP9 detected by RT-PCR, Real-time PCR and Immunofluorescent staining in mouse cornea as soon as 6 hours post infection, and relatively decreased at 1 day post infection...
October 31, 2016: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/27891177/furfural-tolerance-and-detoxification-mechanism-in-candida-tropicalis
#10
Shizeng Wang, Gang Cheng, Chijioke Joshua, Zijun He, Xinxiao Sun, Ruimin Li, Lexuan Liu, Qipeng Yuan
BACKGROUND: Current biomass pretreatment by hydrothermal treatment (including acid hydrolysis, steam explosion, and high-temperature steaming) and ionic liquids generally generate inhibitors to the following fermentation process. Furfural is one of the typical inhibitors generated in hydrothermal treatment of biomass. Furfural could inhibit cell growth rate and decrease biofuel productivity of microbes. Candida tropicalis is a promising microbe for the production of biofuels and value-added chemicals using hemicellulose hydrolysate as carbon source...
2016: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/27889166/taggiasca-extra-virgin-olive-oil-colonization-by-yeasts-during-the-extraction-process
#11
G Ciafardini, G Cioccia, B A Zullo
The opalescent appearance of the newly produced olive oil is due to the presence of solid particles and microdrops of vegetation water in which the microorganisms from the olives' carposphere are trapped. Present research has demonstrated that the microbiota of the fresh extracted olive oil, produced in the mills, is mainly composed of yeasts and to a lesser extent of molds. The close link between the composition of the microbiota of the olives' carposphere undergoing to processing, and that of the microbiota of the newly produced olive oil, concerns only the yeasts and molds, given that the bacterial component is by and large destroyed mainly in the kneaded paste during the malaxation process...
April 2017: Food Microbiology
https://www.readbyqxmd.com/read/27889126/identification-of-the-major-yeasts-isolated-from-high-moisture-corn-and-corn-silages-in-the-united-states-using-genetic-and-biochemical-methods
#12
M C Santos, C Golt, R D Joerger, G D Mechor, Gerson B Mourão, L Kung
The objective of this study was to identify species of yeasts in samples of high moisture corn (HMC) and corn silage (CS) collected from farms throughout the United States. Samples were plated and colonies were isolated for identification using DNA analysis. Randomly selected colonies were also identified by fatty acid methyl esters (FAME) and by physiological substrate profiling (ID 32C). For CS, Candida ethanolica, Saccharomyces bulderi, Pichia anomala, Kazachstania unispora, and Saccharomyces cerevisiae were the predominant yeasts...
November 23, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27882277/effect-of-silver-nanoparticles-on-the-standard-soil-arthropod-folsomia-candida-collembola-and-the-eukaryote-model-organism-saccharomyces-cerevisiae
#13
Panwad Sillapawattana, Martin C H Gruhlke, Andreas Schäffer
BACKGROUND: Because of their antimicrobial properties, silver nanoparticles (AgNPs) have been widely used and have come into contact with the environment. In the present work, an effect of AgNPs on a standard soil organism, Folsomia candida, was studied (in comparison to silver nitrate) focusing on molecular and cellular alterations as ecotoxicological endpoints. RESULTS: At the molecular level, an up-regulation of metallothionein-containing protein (MTC) mRNA in AgNP-treated groups indicated toxic heavy metal stress effects caused by the release of silver ions from AgNPs, which is similar to animal groups treated with silver nitrate...
2016: Environmental Sciences Europe
https://www.readbyqxmd.com/read/27880665/the-current-treatment-landscape-candidiasis
#14
Matteo Bassetti, Maddalena Peghin, Jean-Francois Timsit
The epidemiology of Candida species infection has changed over recent decades, influenced by local hospital-related factors, patient predisposing conditions and type of antifungal agents administered. A shift from Candida albicans as the predominant pathogen towards an increasing prevalence of the species Candida glabrata and Candida parapsilosis amongst critically ill patients has been documented. Changes in Candida species distribution may impact treatment recommendations due to differences in susceptibility to antifungal agents among species...
November 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27879329/phenotypic-profiling-reveals-that-candida-albicans-opaque-cells-represent-a-metabolically-specialized-cell-state-compared-to-default-white-cells
#15
Iuliana V Ene, Matthew B Lohse, Adrian V Vladu, Joachim Morschhäuser, Alexander D Johnson, Richard J Bennett
: The white-opaque switch is a bistable, epigenetic transition affecting multiple traits in Candida albicans including mating, immunogenicity, and niche specificity. To compare how the two cell states respond to external cues, we examined the fitness, phenotypic switching, and filamentation properties of white cells and opaque cells under 1,440 different conditions at 25°C and 37°C. We demonstrate that white and opaque cells display striking differences in their integration of metabolic and thermal cues, so that the two states exhibit optimal fitness under distinct conditions...
November 22, 2016: MBio
https://www.readbyqxmd.com/read/27872844/fabrication-of-poly-%C3%AE%C2%B5-caprolactone-scaffolds-reinforced-with-cellulose-nanofibers-with-and-without-the-addition-of-hydroxyapatite-nanoparticles
#16
Pedro Morouço, Sara Biscaia, Tânia Viana, Margarida Franco, Cândida Malça, Artur Mateus, Carla Moura, Frederico C Ferreira, Geoffrey Mitchell, Nuno M Alves
Biomaterial properties and controlled architecture of scaffolds are essential features to provide an adequate biological and mechanical support for tissue regeneration, mimicking the ingrowth tissues. In this study, a bioextrusion system was used to produce 3D biodegradable scaffolds with controlled architecture, comprising three types of constructs: (i) poly(ε-caprolactone) (PCL) matrix as reference; (ii) PCL-based matrix reinforced with cellulose nanofibers (CNF); and (iii) PCL-based matrix reinforced with CNF and hydroxyapatite nanoparticles (HANP)...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27867199/candida-albicans-cell-type-switching-and-functional-plasticity-in-the-mammalian-host
#17
Suzanne M Noble, Brittany A Gianetti, Jessica N Witchley
Candida albicans is a ubiquitous commensal of the mammalian microbiome and the most prevalent fungal pathogen of humans. A cell-type transition between yeast and hyphal morphologies in C. albicans was thought to underlie much of the variation in virulence observed in different host tissues. However, novel yeast-like cell morphotypes, including opaque(a/α), grey and gastrointestinally induced transition (GUT) cell types, were recently reported that exhibit marked differences in vitro and in animal models of commensalism and disease...
November 21, 2016: Nature Reviews. Microbiology
https://www.readbyqxmd.com/read/27849179/%C3%A3-glucan-unmasking-in-some-candida-albicans-mutants-correlates-with-increases-in-cell-wall-surface-roughness-and-decreases-in-cell-wall-elasticity
#18
Sahar Hasim, David P Allison, Scott T Retterer, Alex Hopke, Robert T Wheeler, Mitchel J Doktycz, Todd B Reynolds
Candida albicans is among the most common human fungal pathogens, causing a broad range of infections including life threatening systemic infections. The cell wall of C. albicans is the interface between the fungus and the innate immune system. The cell wall is composed of an outer layer enriched in mannosylated glycoproteins (mannan) and an inner layer enriched in ß- (1, 3)-glucan and chitin. Detection of C. albicans by Dectin-1, a C-type signaling lectin specific for ß- (1, 3)-glucan, is important for the innate immune system to recognize systemic fungal infections...
November 14, 2016: Infection and Immunity
https://www.readbyqxmd.com/read/27837497/the-changing-epidemiology-of-invasive-fungal-infections
#19
David A Enoch, Huina Yang, Sani H Aliyu, Christianne Micallef
Invasive fungal infections (IFI) are an emerging problem worldwide with invasive candidiasis and candidemia responsible for the majority of cases. This is predominantly driven by the widespread adoption of aggressive immunosuppressive therapy among certain patient populations (e.g., chemotherapy, transplants) and the increasing use of invasive devices such as central venous catheters (CVCs). The use of new immune modifying drugs has also opened up an entirely new spectrum of patients at risk of IFIs. While the epidemiology of candida infections has changed in the last decade, with a gradual shift from C...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27836850/elimination-of-a-free-cysteine-by-creation-of-a-disulfide-bond-increases-the-activity-and-stability-of-candida-boidinii-formate-dehydrogenase
#20
Junxian Zheng, Taowei Yang, Junping Zhou, Meijuan Xu, Xian Zhang, Zhiming Rao
: NAD(+)-dependent formate dehydrogenase (FDH, EC 1.2.1.2) is an industrial enzyme widely used for NADH regeneration. However, enzyme inactivation caused by the oxidation of cysteine residues is a flaw of native FDH. In this study, we relieved the oxidation of the free cysteine of FDH from Candida boidinii (CboFDH) through the construction of disulfide bonds between A10 and C23 as well as I239 and C262. Variants A10C, I239C and A10C/I239C were obtained by the site-directed mutagenesis and their properties were studied...
November 11, 2016: Applied and Environmental Microbiology
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