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Marwa E Mohamed, Eman Y Z Frag, Abla A Hathoot, Essam A Shalaby
Simple, accurate and robust spectrophotometric method was developed for determination of fenoprofen calcium drug (FPC). The proposed method was based on the charge transfer (CT) reaction of FPC drug (as n-electron donor) with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), 2,4,6-trinitrophenol (picric acid, PA) or 1,2,5,8-tetrahydroxyanthraquinone (Quinalizarin, QZ) (as π-acceptors) to give highly colored charge transfer complexes. Different variables affecting the reaction such as reagent concentration, temperature and time have been carefully optimized to achieve the highest sensitivity...
August 10, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Nidhi Relhan, Stephen G Schwartz, Harry W Flynn
No abstract text is available yet for this article.
August 22, 2017: JAMA: the Journal of the American Medical Association
Alexander Yemelin, Annamaria Brauchler, Stefan Jacob, Julian Laufer, Larissa Heck, Andrew J Foster, Luis Antelo, Karsten Andresen, Eckhard Thines
A forward genetics approach was applied in order to investigate the molecular basis of morphological transition in the wheat pathogenic fungus Zymoseptoria tritici. Z. tritici is a dimorphic plant pathogen displaying environmentally regulated morphogenetic transition between yeast-like and hyphal growth. Considering the infection mode of Z. tritici, the switching to hyphal growth is essential for pathogenicity allowing the fungus the host invasion through natural openings like stomata. We exploited a previously developed Agrobacterium tumefaciens-mediated transformation (ATMT) to generate a mutant library by insertional mutagenesis including more than 10,000 random mutants...
2017: PloS One
Mélanie Ikeh, Yasmin Ahmed, Janet Quinn
The ability of pathogenic fungi to acquire essential macro and micronutrients during infection is a well-established virulence trait. Recent studies in the major human fungal pathogens Candida albicans and Cryptococcus neoformans have revealed that acquisition of the essential macronutrient, phosphate, is essential for virulence. The phosphate sensing and acquisition pathway in fungi, known as the PHO pathway, has been extensively characterized in the model yeast Saccharomyces cerevisiae. In this review, we highlight recent advances in phosphate sensing and signaling mechanisms, and use the S...
August 22, 2017: Microorganisms
Yun Xiang, Man Cheng, Yimei Huang, Shaoshan An, Frédéric Darboux
Afforestation plays an important role in soil protection and ecological restoration. The objective of this study is to understand the effect of afforestation on soil carbon and soil microbial communities in the Loess Plateau of China. We measured two chemically-separated carbon fractions (i.e., humic acid, HA, and fulvic acid, FA) and soil microbial communities within shrublands (18-year-old Caragana korshinskii Kom (shrubland I) and 28-year-old Caragana korshinskii Kom (shrubland II)) and cropland. The size and structure of the soil microbial community was measured by phospholipid fatty acid (PLFA) analysis...
August 22, 2017: International Journal of Environmental Research and Public Health
Wilfried Posch, David Heimdörfer, Doris Wilflingseder, Cornelia Lass-Flörl
Delayed initial antifungal therapy is associated with high mortality rates caused by invasive Candida infections, since accurate detection of the opportunistic pathogenic yeast and its identification display a diagnostic challenge. Diagnosis of Candida infections relies on time-consuming methods such as blood cultures, serologic and histopathologic examination. To allow for fast detection and characterization of invasive candidiasis, there is a need to improve diagnostic tools. Trends in diagnostics switch to non-culture-based methods, which allow specified diagnosis within significantly shorter periods of time in order to provide early and appropriate antifungal treatment...
August 22, 2017: Expert Review of Anti-infective Therapy
Christine Dodge, Jessica Coolidge, Miriam Cooperband, Allard Cossé, Daniel Carrillo, Richard Stouthamer
The polyphagous shot hole borer and Kuroshio shot hole borer, two members of the Euwallacea fornicatus species complex (Coleoptera: Curculionidae: Scolytinae), are invasive ambrosia beetles that harbor distinct species of Fusarium fungal symbionts. Together with the damage caused by gallery construction, these two phytopathogenic Fusarium species are responsible for the emerging tree disease Fusarium dieback, which affects over 50 common tree species in Southern California. Host trees suffer branch dieback as the xylem is blocked by invading beetles and fungi, forcing the costly removal of dead and dying trees in urban areas...
2017: PeerJ
Celene Hadley, Atif Wasim Haneef Mohamed, Aparna Singhal
A young male, with a known history of hepatitis C and heroin abuse, was admitted to the emergency department with altered sensorium, left-sided weakness, and no meningeal signs. Initial computed tomography imaging showed hypodensity involving right basal ganglia with mass effect but no hemorrhage. Magnetic resonance imaging revealed multiple nonenhancing small foci of restricted diffusion involving the right basal ganglia, T2 and FLAIR hyperintensity within the right basal ganglia, and internal capsule with mild surrounding edema...
September 2017: Radiology case reports
Daniel G Panaccione, Stephanie L Arnold
Neosartorya fumigata (Aspergillus fumigatus) is the most common cause of invasive aspergillosis, a frequently fatal lung disease primarily affecting immunocompromised individuals. This opportunistic fungal pathogen produces several classes of specialised metabolites including products of a branch of the ergot alkaloid pathway called fumigaclavines. The biosynthesis of the N. fumigata ergot alkaloids and their relation to those produced by alternate pathway branches in fungi from the plant-inhabiting Clavicipitaceae have been well-characterised, but the potential role of these alkaloids in animal pathogenesis has not been studied extensively...
August 21, 2017: Scientific Reports
Upma Narain, Arvind Gupta
BACKGROUND: The occurrence of urinary tract infection (UTI) in nephrotic syndrome has been reported. However, the only causes for the infection reported to date are bacteria and prior reported series did not identify yeast or fungi as causative organisms. METHODS: A retrospective study of 2880 children with nephrotic syndrome was made to determine the incidence of UTI, predisposing factor and bacterial and fungal etiologies. RESULTS: Between January 2000 and November 2016 we identified that 15% of the children developed urinary tract infection...
August 17, 2017: Pediatric Infectious Disease Journal
Nidhi Adlakha, Girish H Rajacharya, Rakesh Bhatnagar
Lytic polysaccharide monooxygenases (LPMOs) are oxidative biocatalysts important for biofuel development. LPMOs use molecular oxygen and an external electron donor to cleave chemically recalcitrant polysaccharide. Because of LPMOs important role in carbohydrate turnover, interest in their mechanism of action and identification of their redox partners has recently surged. Current knowledge of the electron donor partners in LPMO-catalyzed reactions solely relies on observations of LPMO co-secretory proteins and on conjecture about the molecules that may act as LPMO-associated reductants...
August 21, 2017: Journal of Biological Chemistry
Alina Świzdor, Anna Panek, Natalia Milecka-Tronina
Aspergillus niger, one of fungal species most frequently used for experimental and industrial-scale biotransformations of various organic compounds, is generally known to transform steroids at 16β position. In this work, application of the strain A. niger KCH910 to bioconversion of dehydroepiandrosterone (DHEA), androstenediol and testosterone is described, with emphasis on the metabolic steps leading to the products. Evidence from this study indicated that incubated 5-ene steroids underwent bioconversion within two metabolic pathways: oxidation by the action of 3β-HSD (3β-hydroxysteroid dehydrogenase) to 4-ene steroids, and minor allylic hydroxylation to epimeric 7-alcohols...
August 18, 2017: Steroids
M Sasso, A Barrot, M-J Carles, K Griffiths, P Rispail, L Crampette, B Lallemant, L Lachaud
Fungi are widely implicated in chronic rhinosinusitis. Direct microscopic examination (DME) is used to confirm the biological diagnosis of fungal rhinosinusitis (FRS). Diagnostic sensitivity of DME is better than culture, however DME does not allow fungal species identification. In this study, we included 54 sinus samples demonstrating hyphae on DME. Direct sequencing was compared to culture for the identification of the fungal species. Sequence analysis identified fungi in 81.5% of cases while culture was positive in only 31...
August 18, 2017: Journal de Mycologie Médicale
R O Oladele, N K Irurhe, P Foden, A S Akanmu, T Gbaja-Biamila, A Nwosu, H A Ekundayo, F T Ogunsola, M D Richardson, D W Denning
OBJECTIVE: To evaluate chronic pulmonary aspergillosis (CPA) as an alternative diagnosis of smear-negative tuberculosis (TB) and treatment failure in TB patients in Nigeria. METHODS: We conducted a cross-sectional multicentre survey in human immunodeficiency virus (HIV) positive and negative adult patients at the end of their TB treatment in clinics in Lagos and Ilorin states. All were assessed using clinical examination, chest X-ray (CXR) and aspergillus immunoglobulin G (IgG) serology, and some for sputum fungal culture...
September 1, 2017: International Journal of Tuberculosis and Lung Disease
John A Gerlt
The exponentially increasing number of protein and nucleic acid sequences provides opportunities to discover novel enzymes, metabolic pathways, and metabolites/natural products, thereby adding to our knowledge of biochemistry and biology. The challenge has evolved from generating sequence information to mining the databases to integrating and leveraging the available information, i.e., the availability of "genomic enzymology" web tools. Web tools that allow identification of biosynthetic gene clusters are widely used by the natural products/synthetic biology community, thereby facilitating the discovery of novel natural products and the enzymes responsible for their biosynthesis...
August 22, 2017: Biochemistry
Chengjie Ren, Wei Zhang, ZeKun Zhong, Xinhui Han, Gaihe Yang, Yongzhong Feng, Guangxin Ren
Alt'itudinal gradients strongly affect plant biodiversity, but the effects on microbial patterns remain unclear, especially in the large scale. We therefore designed an altitudinal gradient experiment that covered three climate zones to monitor soil microbial community dynamics and to compare those with plant and soil characteristics. Illumina sequencing of the 16S rRNA gene and ITS gene was used to analyze soil microbial (bacterial and fungal) diversity and composition, and fumigation-extraction was used to determine microbial biomass; the plant community metrics (i...
August 17, 2017: Science of the Total Environment
Yuke Cen, Bea Timmermans, Ben Souffriau, Johan M Thevelein, Patrick Van Dijck
Candida glabrata is reported as the second most prevalent human opportunistic fungal pathogen in North America and is threatening patients all over the world. Its incidence is rising, while it has developed resistance to the most widely used antifungal drugs, necessitating new approaches based on better insight into the biology of the organism. Despite its close phylogenetic relationship with Saccharomyces cerevisiae, generating precise genomic alterations in this species is problematic. Previously we have shown that deletion of LIG4, which encodes an enzyme involved in Non-Homologous End Joining (NHEJ), strongly enhances the probability of obtaining correctly modified transformants...
August 16, 2017: Fungal Genetics and Biology: FG & B
N De Castro-Català, I Muñoz, J L Riera, A T Ford
In recent years, behavior-related endpoints have been proposed as rapid and reliable ecotoxicological tools for risk assessment. In particular, the use of detritivores to test the toxicity of pollutants through feeding is currently becoming a well-known method. Experiments combining feeding with other behavioral endpoints can provide relevant information about direct and indirect toxicological effects of chemicals. We carried out a feeding experiment with the shredder Gammarus pulex in order to detect indirect (through leaf conditioning) and direct effects (through water exposure) of two pollutants at environmentally relevant concentrations: the fungicide prochloraz (6 μg/L) and the antidepressant fluoxetine (100 ng/L)...
August 16, 2017: Environmental Pollution
Kamila Tomoko Yuyama, Diana Fortkamp, Wolf-Rainer Abraham
Eremophilanes are sesquiterpenes with a rearranged carbon skeleton formed both by plants and fungi, however, almost no plant eremophilanes are found in fungi. These eremophilanes possess mainly phytotoxic, antimicrobial, anticancer and immunomodulatory properties and in this review fungal eremophilanes with bioactivities of potential medicinal applications are reviewed and discussed. A special focus is set on natural products bearing highly functionalized fatty acids at C-1 or C-3 position of the eremophilane backbone...
August 28, 2017: Biological Chemistry
R Gao, C Kong, H Li, L Huang, X Qu, N Qin, H Qin
Microbiota refers to a colony of microorganisms, and they are found in all multicellular organisms. This colony plays a major role in both the physiology and disease of the organism it inhabits. Much attention has been paid to host-microbiota interactions, but there has been little investigation on its role in carcinogenesis. In this study, we characterized a fecal mycobiota, also known as fungal signature, for the first time with 131 subjects, comprising polyp and colorectal cancer (CRC) patients, as well as a healthy control population...
August 18, 2017: European Journal of Clinical Microbiology & Infectious Diseases
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