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https://www.readbyqxmd.com/read/29684150/prevalence-and-characterization-of-azole-resistant-aspergillus-fumigatus-in-patients-with-cystic-fibrosis-a-prospective-multicentre-study-in-germany
#1
R Seufert, L Sedlacek, B Kahl, M Hogardt, A Hamprecht, G Haase, F Gunzer, A Haas, S Grauling-Halama, C R MacKenzie, A Essig, F Stehling, S Sutharsan, S Dittmer, D Killengray, D Schmidt, N Eskandarian, E Steinmann, J Buer, F Hagen, J F Meis, P-M Rath, J Steinmann
Objectives: Aspergillus fumigatus is the most prevalent filamentous fungus in the respiratory tract of patients with cystic fibrosis (CF). The aim of this prospective multicentre study was to investigate the prevalence of azole-resistant A. fumigatus (ARAF) in respiratory secretions from CF patients across Germany and to characterize ARAF isolates by phenotypic and molecular methods. Methods: Twelve tertiary care centres from Germany participated in the study. In total, 2888 A...
April 19, 2018: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29684060/moyvh1-subverts-rice-defense-through-functions-of-ribosomal-protein-momrt4-in-magnaporthe-oryzae
#2
Xinyu Liu, Jie Yang, Bin Qian, Yongchao Cai, Xi Zou, Haifeng Zhang, Xiaobo Zheng, Ping Wang, Zhengguang Zhang
The accumulation of the reactive oxygen species (ROS) in rice is important in its interaction with the rice blast fungus Magnaporthe oryzae during which the pathogen scavenges ROS through the production of extracellular enzymes that promote blast. We previously characterized the MoYvh1 protein phosphatase from M. oryzae that plays a role in scavenging of ROS. To understand the underlying mechanism, we found that MoYvh1 is translocated into the nucleus following oxidative stress and that this translocation is dependent on MoSsb1 and MoSsz1 that are homologous to heat-shock protein 70 (Hsp70) proteins...
April 23, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29684023/in-vivo-insertion-pool-sequencing-identifies-virulence-factors-in-a-complex-fungal-host-interaction
#3
Simon Uhse, Florian G Pflug, Alexandra Stirnberg, Klaus Ehrlinger, Arndt von Haeseler, Armin Djamei
Large-scale insertional mutagenesis screens can be powerful genome-wide tools if they are streamlined with efficient downstream analysis, which is a serious bottleneck in complex biological systems. A major impediment to the success of next-generation sequencing (NGS)-based screens for virulence factors is that the genetic material of pathogens is often underrepresented within the eukaryotic host, making detection extremely challenging. We therefore established insertion Pool-Sequencing (iPool-Seq) on maize infected with the biotrophic fungus U...
April 2018: PLoS Biology
https://www.readbyqxmd.com/read/29683350/discovery-of-a-new-biphenyl-derivative-by-epigenetic-manipulation-of-marine-derived-fungus-aspergillus-versicolor
#4
Jing Xuan Zhu, Lijian Ding, Shan He
Cultivation of the marine-derived Aspergillus versicolor MCCC 3A00080 with the addition of a histone deacetylase inhibitor, suberoylanilide hydroxamic acid (SAHA), significantly enhanced the diversity of secondary metabolites. From the culture treated, a new biphenyl derivative, named versiperol A (1), along with two known compounds, 2,4-dimethoxyphenol (2) and diorcinol (3) were isolated. The structures of 1-3 were established based on spectroscopic analysis and comparison with literature data. Among the isolates, versiperol A (1) exhibited modest inhibition of Staphylococcus aureus growth with MIC value of 8 μg/mL...
April 23, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29682127/de-novo-sequencing-of-a-sparassis-latifolia-genome-and-its-associated-comparative-analyses
#5
Donglai Xiao, Lu Ma, Chi Yang, Zhenghe Ying, Xiaoling Jiang, Yan-Quan Lin
Known to be rich in β- glucan, Sparassis latifolia ( S. latifolia ) is a valuable edible fungus cultivated in East Asia. A few studies have suggested that S. latifolia is effective on antidiabetic, antihypertension, antitumor, and antiallergen medications. However, it is still unclear genetically why the fungus has these medical effects, which has become a key bottleneck for its further applications. To provide a better understanding of this fungus, we sequenced its whole genome, which has a total size of 48...
2018: Canadian Journal of Infectious Diseases & Medical Microbiology
https://www.readbyqxmd.com/read/29681943/morphological-and-molecular-identification-of-the-causal-agent-of-anthracnose-disease-of-avocado-in-kenya
#6
S K Kimaru, E Monda, R C Cheruiyot, J Mbaka, A Alakonya
Anthracnose disease of avocado contributes to a huge loss of avocado fruits due to postharvest rot in Kenya. The causal agent of this disease has not been clear but presumed to be Colletotrichum gloeosporioides as reported in other regions where avocado is grown. The fungus mainly infects fruits causing symptoms such as small blackish spots, "pepper spots," and black spots with raised margin which coalesce as infection progresses. Due to economic losses associated with the disease and emerging information of other species of fungi as causal agents of the disease, this study was aimed at identifying causal agent(s) of the disease...
2018: International Journal of Microbiology
https://www.readbyqxmd.com/read/29681740/new-nematicidal-and-antimicrobial-secondary-metabolites-from-a-new-species-in-the-new-genus-pseudobambusicola-thailandica
#7
Zeljka Rupcic, Clara Chepkirui, Margarita Hernández-Restrepo, Pedro W Crous, Janet Jennifer Luangsa-Ard, Marc Stadler
During the course of a study on the functional biodiversity of the mycobiota inhabiting rainforests in Thailand, a fungal strain was isolated from a plant sample and shown to represent an undescribed species, as inferred from a combination of morphological and molecular phylogenetic methods. Molecular phylogenetic analyses, based on four DNA loci, revealed a phylogenetic tree with the newly generated sequences clustering in a separate branch, together with members of the Sulcatisporaceae (Pleosporales, Ascomycota)...
2018: MycoKeys
https://www.readbyqxmd.com/read/29681682/effect-of-medium-ph-on-chemical-selectivity-of-oxalic-acid-biosynthesis-by-aspergillus-niger-w78c-in-submerged-batch-cultures-with-sucrose-as-a-carbon-source
#8
Ewa Walaszczyk, Waldemar Podgórski, Małgorzata Janczar-Smuga, Ewelina Dymarska
The pH of the medium is the key environmental parameter of chemical selectivity of oxalic acid biosynthesis by Aspergillus niger . The activity of the enzyme oxaloacetate hydrolase, which is responsible for decomposition of oxaloacetate to oxalate and acetate inside the cell of the fungus, is highest at pH 6. In the present study, the influence of pH in the range of 3-7 on oxalic acid secretion by A. niger W78C from sucrose was investigated. The highest oxalic acid concentration, 64.3 g dm-3 , was reached in the medium with pH 6...
2018: Chemické Zvesti
https://www.readbyqxmd.com/read/29681022/the-unique-gh5-cellulase-member-in-the-extreme-halotolerant-fungus-aspergillus-glaucus-ccha-is-an-endoglucanase-with-multiple-tolerance-to-salt-alkali-and-heat-prospects-for-straw-degradation-applications
#9
Zhengqun Li, Xue Pei, Ziyu Zhang, Yi Wei, Yanyue Song, Lina Chen, Shouan Liu, Shi-Hong Zhang
In a halotolerant fungus Aspergillus glaucus CCHA, several functional proteins with stress-tolerant activity have been studied, but no secretory enzymes have been identified yet. The unique GH5 cellulase candidate from A. glaucus, an endoglucanase termed as AgCMCase, was cloned, expressed in the Pichia pastoris system and the purified enzyme was characterized. A large amount of recombinant enzyme secreted by the P. pastoris GS115 strain was purified to homogeneity. The molecular weight of the purified endoglucanase is about 55...
April 21, 2018: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/29680127/fungi-in-deep-subsurface-environments
#10
Magnus Ivarsson, Stefan Bengtson, Henrik Drake, Warren Francis
The igneous crust of the oceans and the continents represents the major part of Earth's lithosphere and has recently been recognized as a substantial, yet underexplored, microbial habitat. While prokaryotes have been the focus of most investigations, microeukaryotes have been surprisingly neglected. However, recent work acknowledges eukaryotes, and in particular fungi, as common inhabitants of the deep biosphere, including the deep igneous provinces. The fossil record of the subseafloor igneous crust, and to some extent the continental bedrock, establishes fungi or fungus-like organisms as inhabitants of deep rock since at least the Paleoproterozoic, which challenges the present notion of early fungal evolution...
2018: Advances in Applied Microbiology
https://www.readbyqxmd.com/read/29679907/in-vitro-screening-homology-modeling-and-molecular-docking-studies-of-some-pyrazole-and-imidazole-derivatives
#11
Farid Abrigach, Yahya Rokni, Abdelilah Takfaoui, Mohamed Khoutoul, Henri Doucet, Abdeslam Asehraou, Rachid Touzani
A series of synthesized compounds based on pyrazole and imidazole skeletons prepared by palladium catalysts via a one-pot reaction was screened to determine their inhibitory potency against the pathogen fungus Fusarium oxysporum f.sp. albedinis (F.o.a) and four bacteria strains namely Micrococcus luteus, Bacillus subtilis, Staphylococcus aureus and Escherichia coli. The obtained result showed that these compounds exhibit an efficiency antifungal action. Whereas, they showed a very weak antibacterial activity...
April 18, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29679424/lomentospora-prolificans-fungemia-in-hematopoietic-stem-cell-transplant-patients-first-report-in-south-america-and-literature-review
#12
Fernando D Penteado, Nadia Litvinov, Jaques Sztajnbok, Danilo Y Thomaz, Antonio M Dos Santos, Dewton M Vasconcelos, Adriana L Motta, Flávia Rossi, Juliana F Fernandes, Heloisa Helena S Marques, Gil Benard, João N de Almeida Júnior
Lomentospora prolificans is a filamentous fungus and an emerging pathogen in immunocompromised patients. It is encountered most commonly in Australia, Spain, and USA. We described the first case of Lomentospora prolificans fungemia in South America. The patient was a hematopoietic stem cell transplantation (HSCT) recipient who developed the infection 37 days after stem cells infusion. In addition, we performed a literature review of invasive lomentosporiosis in HSCT patients. This article is protected by copyright...
April 20, 2018: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/29679267/engelmann-spruce-chemotypes-in-colorado-and-their-effects-on-symbiotic-fungi-associated-with-the-north-american-spruce-beetle
#13
Thomas Seth Davis, Fiona B Horne, Jens C Yetter, Jane E Stewart
Conifer secondary metabolites play a key role in mechanisms of resistance to biotic disturbance, especially by bark beetles and beetle-associated microorganisms. Here, we describe variation in constitutive monoterpenes isolated from Engelmann spruce, Picea engelmannii, phloem across fourteen high-elevation populations in the Rocky Mountains of Colorado, and test interactions between phloem monoterpenes and an endophloedic symbiotic fungus, Leptographium abietinum, associated with the North American spruce beetle, Dendroctonus rufipennis...
April 20, 2018: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29679239/comparative-analysis-of-the-root-transcriptomes-of-cultivated-and-wild-rice-varieties-in-response-to-magnaporthe-oryzae-infection-revealed-both-common-and-species-specific-pathogen-responses
#14
Lei Tian, Shaohua Shi, Fahad Nasir, Chunling Chang, Weiqiang Li, Lam-Son Phan Tran, Chunjie Tian
BACKGROUND: Magnaporthe oryzae, the causal fungus of rice blast disease, negatively impacts global rice production. Wild rice (Oryza rufipogon), a relative of cultivated rice (O. sativa), possesses unique attributes that enable it to resist pathogen invasion. Although wild rice represents a major resource for disease resistance, relative to current cultivated rice varieties, no prior studies have compared the immune and transcriptional responses in the roots of wild and cultivated rice to M...
April 20, 2018: Rice
https://www.readbyqxmd.com/read/29679119/the-role-of-iron-competition-in-the-antagonistic-action-of-the-rice-endophyte-streptomyces-sporocinereus-osish-2-against-the-pathogen-magnaporthe-oryzae
#15
Jiarui Zeng, Ting Xu, Lidan Cao, Chunyi Tong, Xuan Zhang, Dingyi Luo, Shuping Han, Pei Pang, Weibin Fu, Jindong Yan, Xuanming Liu, Yonghua Zhu
Rice blast caused by Magnaporthe oryzae severely impacts global rice yield stability. The rice endophyte Streptomyces sporocinereus OsiSh-2, with strong antagonistic activity towards M. oryzae, has been reported in our previous study. To decipher the model of the antagonistic action of OsiSh-2 towards M. oryzae, we compared the iron-capturing abilities of these two strains. The cultivation of OsiSh-2 and a M. oryzae strain under iron-rich and iron-starved conditions showed that M. oryzae depended more on iron supplementation for growth and development than did OsiSh-2...
April 20, 2018: Microbial Ecology
https://www.readbyqxmd.com/read/29678677/photodynamic-inactivation-of-candida-ssp-on-denture-stomatitis-a-clinical-trial-involving-palatal-mucosa-and-prosthesis-disinfection
#16
André M de Senna, Martha M F Vieira, Rosa Maria Machado-de-Sena, Aparecido O Bertolin, Silvia C Núñez, Martha S Ribeiro
Denture stomatitis (DS) is the most common oral fungal infection in denture wearers. Photodynamic inactivation (PDI) has been showing to be an effective technique in vivo against fungi, including fungal infections in the oral cavity. The disinfection of both oral mucosa and denture may represent a real advantage in terms of fungus control. This clinical study was designed to explore methylene blue (MB)-mediated PDI on oral mucosa and prosthesis of patients with DS. Subjects with DS were divided into two groups...
April 17, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29677644/antimicrobial-activity-and-cytotoxicity-of-xanthoquinodin-analogs-from-the-fungus-cytospora-eugeniae-bcc42696
#17
Karoon Sadorn, Siriporn Saepua, Nattawut Boonyuen, Tanapong Boonruangprapa, Pranee Rachtawee, Pattama Pittayakhajonwut
Eleven previously undescribed compounds, including cytosporanthraxanthone, xanthoquinodins A7-A10, ketoxanthoquinodin A6, xanthoquinodins B6-B8, and spiroxanthoquinodins A and B, and one synthetically known compound, 2-methoxy pinselin, as well as ten known compounds, including xanthoquinodins A4-A6, B4, and B5, chrysophanol, physcion, (4S)-5-hydroxy-4-methoxy-α-tetralone, (4S)-4,8-dihydroxy-α-tetralone (or isosclerone), and gonytolide C were isolated from the fungus Cytospora eugeniae BCC42696. Their chemical structures were determined based on the analysis of NMR spectroscopic and mass spectrometric data...
April 17, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29677643/biotransformation-of-cyclocanthogenol-by-the-endophytic-fungus-alternaria-eureka-1e1bl1
#18
Güner Ekiz, Seda Duman, Erdal Bedir
The microbial transformation of cyclocanthogenol (CCG), Astragalus sp. originated sapogenin, by the endophytic fungus Alternaria eureka 1E1BL1 isolated from Astragalus angustifolius was investigated. Hydroxylation, oxidation, epoxidation, O-methylation, ring-expansion and methyl migration reactions were observed on the triterpenoid skeleton. As a result, eight metabolites were isolated and the structures of the previously undescribed compounds were established by 1-D, 2-D NMR and HR-MS analyses.
April 17, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29677563/polysaccharide-of-hericium-erinaceus-attenuates-colitis-in-c57bl-6-mice-via-regulation-of-oxidative-stress-inflammation-related-signaling-pathways-and-modulating-the-composition-of-the-gut-microbiota
#19
Yilin Ren, Yan Geng, Yan Du, Wang Li, Zhen-Ming Lu, Hong-Yu Xu, Guo-Hua Xu, Jin-Song Shi, Zheng-Hong Xu
Inflammatory bowel disease (IBD) is a disease caused by a dysregulated immune with unknown etiology. Hericium erinaceus (H. erinaceus) is a Chinese medicinal fungus, with the effect of prevention and treatment of gastrointestinal disorders. In this study, we have tested the anti-inflammatory effect of polysaccharide of H. erinaceus (HECP, Mw: 86.67 kDa) in the model of dextran sulfate sodium (DSS)-induced colitis in C57BL/6 mice. Our data indicated that HECP could improve clinical symptoms and down-regulate key markers of oxidative stresses, including nitric oxide (NO), malondialdehyde (MDA), total superoxide dismutase (T-SOD), and myeloperoxidase (MPO)...
March 16, 2018: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29676580/identification-of-lycopodium-alkaloids-produced-by-an-ultraviolet-irradiated-strain-of-paraboeremia-an-endophytic-fungus-from-lycopodium-serratum-var-longipetiolatum
#20
Kan'ichiro Ishiuchi, Dai Hirose, Takuma Suzuki, Waka Nakayama, Wen-Ping Jiang, Orawan Monthakantirat, Jin-Bin Wu, Susumu Kitanaka, Toshiaki Makino
12- epi-Lycopodine (1), a Lycopodium alkaloid, along with lycopodine (2) and huperzine A (3), were discovered in the mycelium of Paraboeremia sp. Lsl3KI076, a UV-irradiated strain of Paraboeremia sp. Lsl3, an endophytic fungus from Lycopodium serratum Thunb. var. longipetiolatum Spring. Additionally, a trace of 1 was isolated from Phlegmariurus nummulariifolius (Blume) Ching, and the structure was elucidated on the basis of spectroscopic data. This is the first report proving that a new naturally occurring Lycopodium alkaloid can be obtained from an endophytic fungus...
April 20, 2018: Journal of Natural Products
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