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https://www.readbyqxmd.com/read/28641404/ph-rather-than-nitrification-and-urease-inhibitors-determines-the-community-of-ammonia-oxidizers-in-a-vegetable-soil
#1
Ruijiao Xi, Xi-En Long, Sha Huang, Huaiying Yao
Nitrification inhibitors and urease inhibitors, such as nitrapyrin and N-(n-butyl) thiophosphoric triamide (NBPT), can improve the efficiencies of nitrogen fertilizers in cropland. However, their effects on ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) across different soil pH levels are still unclear. In the present work, vegetable soils at four pH levels were tested to determine the impacts of nitrification and urease inhibitors on the nitrification activities, abundances and diversities of ammonia oxidizers at different pHs by real-time PCR, terminal restriction fragment length polymorphism (T-RFLP) and clone sequence analysis...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28641284/-complementary-medicine-a-serious-option-as-we-are-facing-the-problem-of-bacterial-antibiotic-resistance
#2
Harald Walach
No abstract text is available yet for this article.
June 19, 2017: Complementary Medicine Research
https://www.readbyqxmd.com/read/28641178/stimulatory-effect-of-aggregatibacter-actinomycetemcomitans-dna-on-proinflammatory-cytokine-expression-by-human-gingival-fibroblasts
#3
Uriel Soto-Barreras, Gabriela Cortés-Sandoval, Ruben Dominguez-Perez, Alejandra Loyola-Leyva, Panfilo-Raymundo Martinez-Rodriguez, Juan Pablo Loyola-Rodriguez
OBJECTIVE: While different virulence factors have been reported of Aggregatibacter actinomycetemcomitans (Aa), there is little information about the stimulatory effect of its DNA. The main purpose of this study was to assess the inflammatory response of human gingival fibroblasts (HGFs) stimulated with A. actinomycetemcomitans DNA. DESIGN: Cytokine levels of IL-6, IL-1α and TNF-α were measured on the supernatant of HGFs activated with 10, 25, 50 and 100μg/ml DNA of Aa during 24h...
June 15, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28641094/emerging-concepts-in-cytomegalovirus-infection-following-hematopoietic-stem-cell-transplantation
#4
REVIEW
Jose F Camargo, Krishna V Komanduri
Despite the refinements in molecular methods for the detection of cytomegalovirus (CMV) and the advent of highly effective preemptive strategies, CMV remains a leading cause of morbidity and mortality in hematopoietic cell transplant (HCT) recipients. CMV can cause tissue-invasive disease including pneumonia, hepatitis, colitis, retinitis, and encephalitis. Mortality in HCT recipients with CMV disease can be as high as 60%. CMV infection has been associated with increased risk of secondary bacterial and fungal infections, increased risk of graft-versus-host disease, and high rates of nonrelapse mortality following HCT...
June 14, 2017: Hematology/oncology and Stem Cell Therapy
https://www.readbyqxmd.com/read/28641017/nanpdb-a-resource-for-natural-products-from-northern-african-sources
#5
Fidele Ntie-Kang, Kiran K Telukunta, Kersten Döring, Conrad V Simoben, Aurélien F A Moumbock, Yvette I Malange, Leonel E Njume, Joseph N Yong, Wolfgang Sippl, Stefan Günther
Natural products (NPs) are often regarded as sources of drugs or drug leads or simply as a "source of inspiration" for the discovery of novel drugs. We have built the Northern African Natural Products Database (NANPDB) by collecting information on ∼4500 NPs, covering literature data for the period from 1962 to 2016. The data cover compounds isolated mainly from plants, with contributions from some endophyte, animal (e.g., coral), fungal, and bacterial sources. The compounds were identified from 617 source species, belonging to 146 families...
June 22, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28640974/resistance-to-powdery-mildew8-1-boosts-pattern-triggered-immunity-against-multiple-pathogens-in-arabidopsis-and-rice
#6
Yan Li, Yong Zhang, Qing-Xia Wang, Ting-Ting Wang, Xiao-Long Cao, Zhi-Xue Zhao, Sheng-Li Zhao, Yong-Ju Xu, Zhi-Yuan Xiao, Jin-Lu Li, Jing Fan, Hui Yang, Fu Huang, Shunyuan Xiao, Wen-Ming Wang
The Arabidopsis gene RESISTANCE TO POWDERY MILDEW8.1 (RPW8.1) confers resistance to virulent fungal and oomycete pathogens that cause powdery mildew and downy mildew, respectively. However, the underlying mechanism remains unclear. Here, we show that ectopic expression of RPW8.1 boosts pattern-triggered immunity (PTI) resulting in enhanced resistance against different pathogens in both Arabidopsis and rice. In Arabidopsis, transcriptome analysis revealed that ectopic expression of RPW8.1-YFP constitutively up-regulates expression of many pathogen-associated molecular pattern-(PAMP-) inducible genes...
June 22, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28640905/an-efficient-method-for-transgenic-callus-induction-from-vitis-amurensis-petiole
#7
Tingting Zhao, Zemin Wang, Lingye Su, Xiaoming Sun, Jun Cheng, Langlang Zhang, Sospeter Karanja Karungo, Yuepeng Han, Shaohua Li, Haiping Xin
Transformation is the main platform for genetic improvement and gene function studies in plants. However, the established somatic embryo transformation system for grapevines is time-consuming and has low efficiency, which limits its utilization in functional genomics research. Vitis amurensis is a wild Vitis species with remarkable cold tolerance. The lack of an efficient genetic transformation system for it has significantly hindered the functional identification of cold stress related genes in the species...
2017: PloS One
https://www.readbyqxmd.com/read/28640897/impact-of-selected-non-steroidal-anti-inflammatory-pharmaceuticals-on-microbial-community-assembly-and-activity-in-sequencing-batch-reactors
#8
Cong Jiang, Jinju Geng, Haidong Hu, Haijun Ma, Xingsheng Gao, Hongqiang Ren
This study covers three widely detected non-steroidal anti-inflammatory pharmaceuticals (NSAIDs), diclofenac (DCF), ibuprofen (IBP) and naproxen (NPX), as NSAIDs pollutants. The objective is to evaluate the impact of NSAIDs at their environmental concentrations on microbial community assembly and activity. The exposure experiments were conducted under three conditions (5 μg L-1 DCF, 5 μg L-1 DCF+5 μg L-1 IBP and 5 μg L-1 DCF+5 μg L-1 IBP+ 5 μg L-1 NPX) in sequencing batch reactors (SBRs) for 130 days...
2017: PloS One
https://www.readbyqxmd.com/read/28640892/novel-resistance-to-cydia-pomonella-granulovirus-cpgv-in-codling-moth-shows-autosomal-and-dominant-inheritance-and-confers-cross-resistance-to-different-cpgv-genome-groups
#9
Annette J Sauer, Eva Fritsch, Karin Undorf-Spahn, Petr Nguyen, Frantisek Marec, David G Heckel, Johannes A Jehle
Commercial Cydia pomonella granulovirus (CpGV) products have been successfully applied to control codling moth (CM) in organic and integrated fruit production for more than 30 years. Since 2005, resistance against the widely used isolate CpGV-M has been reported from different countries in Europe. The inheritance of this so-called type I resistance is dominant and linked to the Z chromosome. Recently, a second form (type II) of CpGV resistance in CM was reported from a field population (NRW-WE) in Germany. Type II resistance confers reduced susceptibility not only to CpGV-M but to most known CpGV isolates and it does not follow the previously described Z-linked inheritance of type I resistance...
2017: PloS One
https://www.readbyqxmd.com/read/28640808/transmembrane-helical-interactions-in-the-cftr-channel-pore
#10
Jhuma Das, Andrei A Aleksandrov, Liying Cui, Lihua He, John R Riordan, Nikolay V Dokholyan
Mutations in the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene affect CFTR protein biogenesis or its function as a chloride channel, resulting in dysregulation of epithelial fluid transport in the lung, pancreas and other organs in cystic fibrosis (CF). Development of pharmaceutical strategies to treat CF requires understanding of the mechanisms underlying channel function. However, incomplete 3D structural information on the unique ABC ion channel, CFTR, hinders elucidation of its functional mechanism and correction of cystic fibrosis causing mutants...
June 22, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28640750/in-vivo-monitoring-of-infection-via-implantable-microsensors-a-pilot-study
#11
Andrej Ring, Heiko Sorg, Andreas Weltin, Daniel J Tilkorn, Jochen Kieninger, Gerald Urban, Jörg Hauser
The most common complication after implantation of foreign material is infection, leading to implant failure and severe patient discomfort. Smoldering-infections proceed inapparently and might not get verified by radiological diagnostics. Early identification of this type of infection might significantly reduce the rate of complications. Therefore, we manufactured a microsensor strip in a hybrid of thin-film and laminate technology in a wafer-level process. It comprises electrochemical, amperometric microsensors for glucose, oxygen and lactate as well as an integrated reference electrode...
June 22, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28640728/wound-bed-preparation-a-vital-step-in-the-healing-process
#12
Simon Barrett
Non-healing wounds are a significant burden to healthcare systems, where it is estimated that 4-5% of the adult population has a problem wound at any one time ( Guest et al, 2017 ). It is suggested that infection is the most frequent complication in non-healing wounds where it can prolong patient treatment times and increase resource use ( Gottrup et al, 2013 ). Wound infection develops as a result of an imbalance between the patient's immune system and the conditions in the wound, which subsequently can promote bacterial proliferation ( Wounds UK, 2013 )...
June 22, 2017: British Journal of Nursing: BJN
https://www.readbyqxmd.com/read/28640714/an-unexplored-brain-gut-microbiota-axis-in-stroke
#13
Shu Wen Wen, Connie H Y Wong
Microbiota research, in particular that of the gut, has recently gained much attention in medical research owing to technological advances in metagenomics and metabolomics. Despite this, much of the research direction has focused on long-term or chronic effects of microbiota manipulation on health and disease. In this addendum, we reflect on our recent publication that reported findings addressing a rather unconventional hypothesis. Bacterial pneumonia is highly prevalent and is one of the leading contributors to stroke morbidity and mortality worldwide...
June 22, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28640632/gut-microbiota-nitric-oxide-and-microglia-as-pre-requisites-for-neurodegenerative-disorders
#14
Joyce Ka Yu Tse
Regulating fluctuating endogenous nitric oxide (NO) levels is necessary for proper physiological functions. Aberrant NO pathways are implicated in a number of neurological disorders, including Alzheimer's Disease (AD) and Parkinson's Disease. The mechanism of NO in oxidative and nitrosative stress with pathological consequences involves reactions with reactive oxygen species (e.g. superoxide) to form the highly reactive peroxynitrite, hydrogen peroxide, hypochloride ions and hydroxyl radical. NO levels are typically regulated by endogenous nitric oxide synthases (NOS), and inflammatory iNOS is implicated in the pathogenesis of neurodegenerative diseases, in which elevated NO mediates axonal degeneration and activates cyclooxygenases to provoke neuroinflammation...
June 22, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28640599/a-high-throughput-dna-sequencing-approach-to-determine-sources-of-fecal-bacteria-in-a-lake-superior-estuary
#15
Clairessa M Brown, Christopher Staley, Ping Wang, Brent Dalzell, Chan Lan Chun, Michael J Sadowsky
Current microbial source tracking (MST) methods, employed to determine sources of fecal contamination in waterways, use molecular markers targeting host-associated bacteria in animal or human feces. However, there is a lack of knowledge about fecal microbiome composition in several animals and imperfect marker specificity and sensitivity. To overcome these issues, a community-based MST method has been developed. Here, we describe a study done in the Lake Superior-St. Louis River estuary using SourceTracker, a program that calculates the source contribution to an environment...
June 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28640578/the-insect-analogue-to-the-lotus-leaf-a-planthopper-wing-membrane-incorporating-a-low-adhesion-non-wetting-superhydrophobic-bactericidal-and-biocompatible-surface
#16
Gregory Shaun Watson, David W Green, Bronwen W Cribb, Christopher Leslie Brown, Christopher Merritt, Mark James Tobin, Jitraporn Vongsvivut, Ming-Xia Sun, Alping Liang, Jolanta Anna Watson
Nature has produced many intriguing and spectacular surfaces at the micro and nanoscales. These small surface decorations act for a singular or, in most cases, a range of functions. The minute landscape found on the lotus leaf is one such example, displaying anti-wetting behaviour and low adhesion with foreign particulate matter. Indeed the lotus leaf has often been considered the 'benchmark' for such properties. One could expect that there are animal counterparts of this self-drying and self-cleaning surface system...
June 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28637338/complex-interactions-between-potentially-pathogenic-opportunistic-and-resident-bacteria-emerge-during-infection-on-a-reef-building-coral
#17
Sarah A Gignoux-Wolfsohn, Felicia M Aronson, Steven V Vollmer
Increased bacterial diversity on diseased corals can obscure disease etiology and complicate our understanding of pathogenesis. To untangle microbes that may cause white band disease signs from microbes responding to disease, we inoculated healthy Acropora cervicornis corals with an infectious dose from visibly diseased corals. We sampled these dosed corals and healthy controls over time for sequencing of the bacterial 16S region. Endozoicomonas were associated with healthy fragments from 4/10 colonies, dominating microbiomes before dosing and decreasing over time only in corals that displayed disease signs, suggesting a role in disease resistance...
June 15, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28637321/amino-acid-substrates-impose-polyamine-eif5a-or-hypusine-requirement-for-peptide-synthesis
#18
Byung-Sik Shin, Takayuki Katoh, Erik Gutierrez, Joo-Ran Kim, Hiroaki Suga, Thomas E Dever
Whereas ribosomes efficiently catalyze peptide bond synthesis by most amino acids, the imino acid proline is a poor substrate for protein synthesis. Previous studies have shown that the translation factor eIF5A and its bacterial ortholog EF-P bind in the E site of the ribosome where they contact the peptidyl-tRNA in the P site and play a critical role in promoting the synthesis of polyproline peptides. Using misacylated Pro-tRNAPhe and Phe-tRNAPro, we show that the imino acid proline and not tRNAPro imposes the primary eIF5A requirement for polyproline synthesis...
June 16, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28637315/attenuated-effects-of-bile-acids-on-glucose-metabolism-and-insulin-sensitivity-in-a-male-mouse-model-of-prenatal-undernutrition
#19
Huijuan Ma, Vicencia M Sales, Ashley R Wolf, Sathish Subramanian, Tucker J Matthews, Michael Chen, Aparna Sharma, Walt Gall, Wim Kulik, David E Cohen, Yusuke Adachi, Nicholas W Griffin, Jeffrey I Gordon, Mary-Elizabeth Patti, Elvira Isganaitis
Prenatal undernutrition and low birth weight are associated with risk of type 2 diabetes and obesity. Prenatal caloric restriction results in low birth weight, glucose intolerance, obesity, and reduced plasma bile acids (BA) in offspring mice. Since BAs can regulate systemic metabolism and glucose homeostasis, we hypothesized that BA supplementation could prevent diet-induced obesity and glucose intolerance in this model of developmental programming. Pregnant dams were food restricted by 50% from gestational days 12...
June 15, 2017: Endocrinology
https://www.readbyqxmd.com/read/28637304/effects-of-alternative-electron-acceptors-on-the-activity-and-community-structure-of-methane-producing-and-consuming-microbes-in-the-sediments-of-two-shallow-boreal-lakes
#20
Antti J Rissanen, Anu Karvinen, Hannu Nykänen, Sari Peura, Marja Tiirola, Anita Mäki, Paula Kankaala
The role of anaerobic CH4 oxidation in controlling lake sediment CH4 emissions remains unclear. Therefore, we tested how relevant EAs (SO42-, NO3-, Fe3+, Mn4+, O2) affect CH4 production and oxidation in the sediments of two shallow boreal lakes. The changes induced to microbial communities by the addition of Fe3+ and Mn4+ were studied using next-generation sequencing targeting the 16S rRNA and methyl-coenzyme M reductase (mcrA) genes and mcrA transcripts. Putative anaerobic CH4 oxidizing archaea (ANME-2D) and bacteria (NC 10) were scarce (up to 3...
June 15, 2017: FEMS Microbiology Ecology
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