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https://www.readbyqxmd.com/read/28330133/bioactive-metabolites-produced-by-streptomyces-cheonanensis-vuk-a-from-coringa-mangrove-sediments-isolation-structure-elucidation-and-bioactivity
#1
Ushakiranmayi Mangamuri, Vijayalakshmi Muvva, Sudhakar Poda, Krishna Naragani, Rajesh Kumar Munaganti, Bhujangarao Chitturi, Venkateswarlu Yenamandra
The strain VUK-A was isolated from a sediment sample of the Coringa mangrove ecosystem was identified as Streptomyces cheonanensis based on morphological, physiological, biochemical and molecular properties. Chemical investigation of the secondary metabolites of the strain Streptomyces cheonanensis VUK-A has led to the segregation of two bioactive compounds, namely 2-Methyl butyl propyl phthalate (1) and Diethyl phthalate (2) using column chromatography. The chemical structure of the active compounds was established on the basis of spectroscopic analysis, including (1)H NMR and (13)C NMR spectroscopies, FTIR and EIMS...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28329730/synthesis-of-novel-quinoline-based-4-5-dihydro-1h-pyrazoles-as-potential-anticancer-antifungal-antibacterial-and-antiprotozoal-agents
#2
Jonathan Ramírez-Prada, Sara M Robledo, Iván D Vélez, María Del Pilar Crespo, Jairo Quiroga, Rodrigo Abonia, Alba Montoya, Laura Svetaz, Susana Zacchino, Braulio Insuasty
A new series of N-substituted 2-pyrazolines 9a-f, 10a-f, 11a-f, 12a-f and 13a-f were obtained from the cyclocondensation reaction of [(7-chloroquinolin-4-yl)amino]chalcones 8a-f with hydrazine hydrate and its derivatives. Fourteen of the synthesized compounds including the starting chalcones were selected by US National Cancer Institute (NCI) for testing their anticancer activity against 60 different human cancer cell lines, with the most important GI50 values ranging from 0.28 to 11.7 μM (0.13-6.05 μg/mL) and LC50 values ranging from 2...
March 16, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28327806/invasive-fungal-infection-in-patients-with-hematologic-disorders-in-a-brazilian-tertiary-care-hospital
#3
Milton Camplesi, Hildene Meneses Silva, Adriano Moraes Arantes, Carolina Rodrigues Costa, Fábio Silvestre Ataides, Thaisa Cristina Silva, Maysa de Paula Costa Dos Reis, Maria do Rosário Rodrigues Silva
INTRODUCTION: Invasive fungal infections (IFIs) are an important complication in immunocompromised individuals, particularly neutropenic patients with hematological malignancies. In this study, we aimed to verify the epidemiology and diagnosis of IFIs in patients with hematologic problems at a tertiary hospital in Goiânia-GO, Brazil. METHODS: Data from 117 patients, involving 19 cases of IFIs, were collected. The collected data included diagnosis methods, demographics, clinical characteristics, and in vitro susceptibility to different antifungal agents...
January 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28326067/uva-photoactivation-of-harmol-enhances-its-antifungal-activity-against-the-phytopathogens-penicillium-digitatum-and-botrytis-cinerea
#4
Gabriela M Olmedo, Luciana Cerioni, María M González, Franco M Cabrerizo, Sabrina I Volentini, Viviana A Rapisarda
Phytopathogenic fungi responsible for post-harvest diseases on fruit and vegetables cause important economic losses. We have previously reported that harmol (1-methyl-9H-pyrido[3,4-b]indol-7-ol) is active against the causal agents of green and gray molds Penicillium digitatum and Botrytis cinerea, respectively. Here, antifungal activity of harmol was characterized in terms of pH dependency and conidial targets; also photodynamic effects of UVA irradiation on the antimicrobial action were evaluated. Harmol was able to inhibit the growth of both post-harvest fungal disease agents only in acidic conditions (pH 5), when it was found in its protonated form...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28324244/animal-models-and-antifungal-agents-in-paracoccidioidomycosis-an-overview
#5
REVIEW
Luciano Z Goldani, Fernanda Wirth
Paracoccidioides brasiliensis is the etiologic agent of paracoccidioidomycosis, the most prevalent systemic mycosis in Latin America. The morbidity and mortality associated with paracoccidioidomycosis necessitate our understanding of fungal pathogenesis and discovering of new agents to treat this infection. Animal models have contributed much to the knowledge of fungal infections and their corresponding therapeutic treatments. This is true for animal models of the primary fungal pathogens such as P. brasiliensis...
March 21, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28323096/nanoparticles-as-safe-and-effective-delivery-systems-of-antifungal-agents-achievements-and-challenges
#6
REVIEW
Ghareb M Soliman
Invasive fungal infections are becoming a major health concern in several groups of patients leading to severe morbidity and mortality. Moreover, cutaneous fungal infections are a major cause of visits to outpatient skin clinics. Despite the availability of several effective agents in the antifungal drug arena, their therapeutic outcome is less than optimal due to limitations related to drug physicochemical properties and toxicity. For instance, poor aqueous solubility limits the formulations options and efficacy of several azole antifungal drugs while toxicity limits the benefits of many other drugs...
March 16, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28318900/epidemiological-and-mycological-characteristics-of-candidemia-in-iran-a-systematic-review-and-meta-analysis
#7
REVIEW
A Vaezi, H Fakhim, S Khodavaisy, A Alizadeh, M Nazeri, A Soleimani, T Boekhout, H Badali
To date, there has been no comprehensive review of the epidemiology, risk factors, species distribution, and outcomes of candidemia in Iran. This study aimed to perform a systematic review and meta-analysis of all reported candidemia cases in Iran until December 2015. The review process occurred in three steps, namely a literature search, data extraction and statistical analyses. After a comprehensive literature search, we identified 55 cases. The mean age of patients was 46.80±24.30 years (range 1-81 years)...
March 16, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28317465/anti-cryptococcal-activity-of-ethanol-crude-extract-and-hexane-fraction-from-ocimum-basilicum-var-maria-bonita-mechanisms-of-action-and-synergism-with-amphotericin-b-and-ocimum-basilicum-essential-oil
#8
Nathalia N R Cardoso, Celuta S Alviano, Arie F Blank, Maria de Fátima Arrigoni-Blank, Maria Teresa V Romanos, Marcel M L Cunha, Antonio Jorge R da Silva, Daniela S Alviano
CONTEXT: Ocimum basilicum L. (Lamiaceae) has been used in folk medicine to treat headaches, kidney disorders, and intestinal worms. OBJECTIVE: This study evaluates the anti-cryptococcal activity of ethanol crude extract and hexane fraction obtained from O. basilicum var. Maria Bonita leaves. MATERIALS AND METHODS: The MIC values for Cryptococcus sp. were obtained according to Clinical and Laboratory Standards Institute in a range of 0.3-2500 μg/mL...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28317391/in-vitro-inhibitory-effects-of-farnesol-and-interactions-between-farnesol-and-antifungals-against-biofilms-of-candida-albicans-resistant-strains
#9
Jinping Xia, Fang Qian, Wenqian Xu, Zhenzhen Zhang, Xin Wei
Antifungal resistance is a serious problem in clinical infections. Farnesol, which is a potential antifungal agent against biofilms formed by Candida albicans resistant strains (a fluconazole-resistant isolate derived from SC5314 and two clinical Candida resistant isolates), was investigated in this study. The inhibitory effects of farnesol on biofilms were examined by XTT assay. The morphological changes and biofilm thicknesses were analyzed by scanning electron microscopy and confocal laser scanning microscopy, respectively...
March 20, 2017: Biofouling
https://www.readbyqxmd.com/read/28303252/evaluation-of-the-biocontrol-potential-of-purpureocillium-lilacinum-qlp12-against-verticillium-dahliae-in-eggplant
#10
Xingjie Lan, Jing Zhang, Zhaofeng Zong, Qing Ma, Yang Wang
A fungus with broad spectrum antifungal activity was isolated from the soil in Qinling Mountain, Shaanxi Province, in China. The fungus was identified as Purpureocillium lilacinum based on ITS rDNA gene analysis. The strain, coded as QLP12, showed high inhibition activity on fungal mycelium growth in vitro, especially to Mucor piriformis, Trichothecium roseum, Rhizoctonia solani, and Verticillium dahliae, and its potential for biocontrol efficacy of eggplant. Verticillium wilt disease caused by Verticillium dahliae among 10 fungal species tested was explored...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28303057/retrospective-survey-and-evaluation-of-first-line-antibiotics-for-chemotherapy-induced-febrile-neutropenia-in-patients-with-acute-myeloid-leukemia
#11
Naoki Mukoyama, Marie Nakashima, Koichi Miyamura, Akira Yoshimi, Yukihiro Noda, Kazuhiro Mori
Patients with acute leukemia are susceptible to chemotherapy-induced severe myelosuppression, and therefore are at a high risk for febrile neutropenia (FN). In such cases, the use of broad-spectrum antibiotics such as fourth-generation cephalosporins and carbapenems is recommended as first-line antimicrobial treatment; however, the effectiveness of these agents in patients with acute myeloid leukemia (AML) has not been investigated in detail. We retrospectively examined and evaluated the effectiveness of first-line antibiotic treatment regimens for chemotherapy-induced FN in patients with AML in Japanese Red Cross Nagoya Daiichi Hospital...
February 2017: Nagoya Journal of Medical Science
https://www.readbyqxmd.com/read/28299876/essential-oils-of-myrtaceae-species-growing-wild-in-tunisia-chemical-variability-and-antifungal-activity-against-biscogniauxia-mediterranea-the-causative-agent-of-charcoal-canker
#12
Islem Yangui, Meriem Zouaoui Boutiti, Mohamed Boussaid, Chokri Messaoud
The chemical composition of five Eucalyptus species and five Myrtus communis L. populations was investigated using GC-MS and GC-FID. For Eucalyptus essential oils, 32 compounds, representing 88.56-96.83% of the total oil according to species, were identified. The main compounds were 1,8-cineole, α-pinene, p-cymene, ɤ-gurjunene, α-aromadendrene and β-phellandrene. For Myrtle essential oils, 26 compounds, representing 93.13-98.91% of the total oil were identified. α-pinene, 1,8-cineole, linalool and myrtenyl acetate were found to be the major compounds...
March 16, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28299556/antifungal-peptidic-compound-from-the-deep-sea-bacterium-aneurinibacillus-sp-yr247
#13
Atsushi Kurata, Yuto Yamaura, Takumi Tanaka, Chiaki Kato, Kaoru Nakasone, Noriaki Kishimoto
Aneurinibacillus: sp. YR247 was newly isolated from the deep-sea sediment inside the Calyptogena community at a depth of 1171 m in Sagami Bay. The strain exhibited antifungal activity against the filamentous fungus Aspergillus brasiliensis NBRC9455. A crude extract prepared from the YR247 cells by ethanol extraction exhibited broad antimicrobial activities. The antifungal compound is stable at 4-70 °C and pH 2.0-12.0. After treatment with proteinase K, the antifungal activity was not detected, indicating that the antifungal compound of strain YR247 is a peptidic compound...
April 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28296357/antibacterial-antifungal-and-antiviral-effects-of-three-essential-oil-blends
#14
Amandine Brochot, Angèle Guilbot, Laïla Haddioui, Christine Roques
New agents that are effective against common pathogens are needed particularly for those resistant to conventional antimicrobial agents. Essential oils (EOs) are known for their antimicrobial activity. Using the broth microdilution method, we showed that (1) two unique blends of Cinnamomum zeylanicum, Daucus carota, Eucalyptus globulus and Rosmarinus officinalis EOs (AB1 and AB2; cinnamon EOs from two different suppliers) were active against the fourteen Gram-positive and -negative bacteria strains tested, including some antibiotic-resistant strains...
March 14, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28294107/antifungal-mechanisms-of-zno-and-ag-nanoparticles-to-sclerotinia-homoeocarpa
#15
Junli Li, Hyunkyu Sang, Huiyuan Guo, James T Popko, Lili He, Jason C White, Om Parkash Dhankher, Geunhwa Jung, Baoshan Xing
Fungicides have extensively been used to effectively combat fungal diseases on a range of plant species, but resistance to multiple active ingredients has developed in pathogens such as Sclerotinia homoeocarpa, the causal agent of dollar spot on cool-season turfgrasses. Recently, ZnO and Ag nanoparticles (NPs) have received increased attention due to their antimicrobial activities. In this study, the NPs' toxicity and mechanisms of action were investigated as alternative antifungal agents against S. homoeocarpa isolates that varied in their resistance to demethylation inhibitor (DMI) fungicides...
April 18, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28294077/variability-in-antifungal-and-antiviral-use-in-hospitalized-children
#16
Jennifer L Goldman, Rachael K Ross, Brian R Lee, Jason G Newland, Adam L Hersh, Matthew P Kronman, Jeffrey S Gerber
We analyzed antifungal and antiviral prescribing among high-risk children across freestanding children's hospitals. Antifungal and antiviral days of therapy varied across hospitals. Benchmarking antifungal and antiviral use and developing antimicrobial stewardship strategies to optimize use of these high cost agents is needed. Infect Control Hosp Epidemiol 2017;1-4.
March 15, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28289027/efficacy-of-the-investigational-antifungal-vt-1161-in-treating-naturally-occurring-coccidioidomycosis-in-dogs
#17
Lisa F Shubitz, Michael E Roy, Hien T Trinh, William J Hoekstra, Robert J Schotzinger, Edward P Garvey
Coccidioidomycosis can be a chronic, systemic fungal infection requiring long-term to lifetime medication. Thus there is a need for improved antifungal agents with greater efficacy and reduced toxicity. VT-1161 has a low affinity for mammalian cytochromes and potently inhibits fungal CYP51 with proven efficacy in murine models of CNS and respiratory coccidioidomycosis. Dogs experience coccidioidomycosis similar to humans and are a useful preclinical model for naturally occurring disease. Twenty-four client-owned dogs diagnosed with respiratory coccidioidomycosis based on radiography, serology, clinical signs, and clinicopathologic abnormalities were treated with a loading dose of VT-1161 for 14 days followed by 46 days of a lower maintenance dose...
March 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28287172/killing-of-staphylococcus-aureus-and-salmonella-enteritidis-and-neutralization-of-lipopolysaccharide-by-17-residue-bovine-lactoferricins-improved-activity-of-trp-ala-containing-molecules
#18
Ya Hao, Na Yang, Xiumin Wang, Da Teng, Ruoyu Mao, Xiao Wang, Zhanzhan Li, Jianhua Wang
Bovine lactoferricin (LfcinB) has potent antibacterial, antifungal and antiparasitic activities but is also hemolytic. Our objective was to identify LfcinB17-31 derivatives with reduced hemolysis and improved antimicrobial activity via substituting Cys3, Arg4, Gln7, Met10, and Gly14 with more hydrophobic residues. Two peptides, Lfcin4 and Lfcin5, showed higher activity against Staphylococcus aureus and Salmonella enteritidis and lower hemolytic activity than the parent peptide LfcinB17-31. These peptides permeabilized the outer and inner membranes of S...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28285658/competition-assays-revealed-paenibacillus-pasadenensis-strain-r16-as-a-novel-antifungal-agent
#19
Alessandro Passera, Giovanni Venturini, Giovanna Battelli, Paola Casati, Francesca Penaca, Fabio Quaglino, Piero Attilio Bianco
The development of new sustainable containment strategies of plant diseases is very important to guarantee food security while reducing the environmental impact of agriculture. Research of new biocontrol agents is a long and difficult process that involves several steps that start from the identification of possible candidates which, for example, show antibiotic activities, and ends with in field, large scale trials. In this study, the plant growth promoting potential and antifungal effect exerted by a novel, putative candidate biocontrol agent, strain R16, identified as Paenibacillus pasadenensis by sequence analysis of 16S rRNA and rpoB genes, against three important plant pathogenic fungi (Botrytis cinerea, Fusarium verticillioides, and Phomopsis viticola), were assessed...
May 2017: Microbiological Research
https://www.readbyqxmd.com/read/28284685/identifying-priorities-to-improve-paediatric-in-hospital-antimicrobial-use-by-cross-sectional-evaluation-of-prevalence-and-appropriateness-of-prescription
#20
Walter Alfredo Goycochea-Valdivia, Francisco Moreno-Ramos, José Ramón Paño-Pardo, Francisco Javier Aracil-Santos, Fernando Baquero-Artigao, Teresa Del Rosal-Rabes, María José Mellado-Peña, Luis Escosa-García
INTRODUCTION: Information about paediatric in-hospital antimicrobial usage and prescribing patterns to guide improvement strategies is scant. We aim to use an evaluation of the prevalence and appropriateness of antimicrobial prescription to identify antimicrobial stewardship priorities in children. METHODS: A cross-sectional point study was performed on hospitalised paediatric patients in a Spanish tertiary hospital, assessing the prevalence of antimicrobial prescription (PAP) and appropriateness of antimicrobial prescription (AAP)...
March 8, 2017: Enfermedades Infecciosas y Microbiología Clínica
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