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https://www.readbyqxmd.com/read/28931154/differentially-expressed-proteins-from-the-peritrophic-membrane-related-to-the-lethal-synergistic-mechanisms-observed-in-hyphantria-cunea-larvae-treated-with-a-mixture-of-bt-and-chlorbenzuron
#1
Ming Xu, Fuyuan Xu, Xiaoqin Wu
Hyphantria cunea (Drury) (Lepidoptera: Arctiidae) is an important forest insect pest around the world. It attacks a variety of broad-leaf trees. It has caused serious economic and ecological damage to its new habitats. A mixture of Bt and chlorbenzuron has a higher toxicity and faster killed than those of either agent alone to the 4th instar larvae of H. cunea both by the lab and field test results, and the toxic effect of the mixture treatment was significantly enhanced. Using proteomics technology, including SDS-PAGE and MALDI-TOF-TOF MS, we analyzed differentially expressed proteins of the peritrophic membrane (PM) of the 4th instar larvae of H...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28929961/-national-antimicrobial-resistance-surveillance-system-namrss-external-quality-assessment-studies-2011-2016
#2
Serap Süzük Yıldız, Hüsniye Şimşek, Nilay Çöplü, Zeynep Gülay
Establishment of sustainable and evidence-based surveillance systems are recommended for prevention of microbial resistance by the World Health Organization (WHO). As a necessity of these surveillance systems, participants are recommended to implement an external quality assessment (EQA) program. In this scope, National Antimicrobial Resistance Surveillance System (NARSS) has been established within the Public Health Institute of Turkey (PHIT) in our country since 2011. In the scope of this surveillance, NARSS EQA program has been implemented in a cycle per year and four isolates were sent to participants per cycle every year since 2011...
July 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28925517/differences-in-protein-expression-among-five-species-of-stream-stonefly-plecoptera-along-a-latitudinal-gradient-in-japan
#3
Maribet Gamboa, Maria Claret Tsuchiya, Suguru Matsumoto, Hisato Iwata, Kozo Watanabe
Proteome variation among natural populations along an environmental gradient may provide insights into how the biological functions of species are related to their local adaptation. We investigated protein expression in five stream stonefly species from four geographic regions along a latitudinal gradient in Japan with varying climatic conditions. The extracted proteins were separated by two-dimensional gel electrophoresis and identified by matrix-assisted laser desorption/ionization of time-of-flight (MALDI TOF/TOF), yielding 446 proteins...
September 19, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28924947/development-of-a-rapid-maldi-tof-ms-based-epidemiological-screening-method-using-mrsa-as-a-model-organism
#4
Åsa Lindgren, Nahid Karami, Roger Karlsson, Christina Åhrén, Martin Welker, Edward R B Moore, Liselott Svensson Stadler
In this study we present a method using whole cell MALDI-TOF MS and VITEK MS RUO/SARAMIS as a rapid epidemiological screening tool. MRSA was used as a model organism for setting up the screening strategy. A collection of well-characterised MRSA strains representing the 19 most common Pulsed-Field Gel Electrophoresis (PFGE)-types in the region of South-West Sweden for the past 20 years was analysed with MALDI-TOF MS. A total of 111 MRSA strains were used for creating 19 PFGE-specific Superspectra using VITEK MS RUO/SARAMIS...
September 18, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28924631/new-features-in-the-lipid-a-structure-of-brucella-suis-and-brucella-abortus-lipopolysaccharide
#5
Adriana C Casabuono, Cecilia Czibener, Mariela G Del Giudice, Ezequiel Valguarnera, Juan E Ugalde, Alicia S Couto
Brucellaceae are Gram-negative bacteria that cause brucellosis, one of the most distributed worldwide zoonosis, transmitted to humans by contact with either infected animals or their products. The lipopolysaccharide exposed on the cell surface has been intensively studied and is considered a major virulence factor of Brucella. In the last years, structural studies allowed the determination of new structures in the core oligosaccharide and the O-antigen of this lipopolysaccharide. In this work, we have reinvestigated the lipid A structure isolated from B...
September 18, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/28924050/discovery-of-leucokinin-like-neuropeptides-that-modulate-a-specific-parameter-of-feeding-motor-programs-in-the-molluscan-model-aplysia
#6
Guo Zhang, Ferdinand S Vilim, Dan-Dan Liu, Elena V Romanova, Ke Yu, Wang-Ding Yuan, Hui Xiao, Amanda B Hummon, Ting-Ting Chen, Vera Alexeeva, Si-Yuan Yin, Song-An Chen, Elizabeth C Cropper, Jonathan V Sweedler, Klaudiusz R Weiss, Jian Jing
A better understanding of neuromodulation in a behavioral system requires identifying active modulatory transmitters. Here, we used identifiable neurons in a neurobiological model system, the mollusc Aplysia, to study neuropeptides, a diverse class of neuromodulators. We took advantage of two types of feeding neurons, B48 and B1/B2, in the Aplysia buccal ganglion that might contain different neuropeptides. We performed a representational difference analysis (RDA) by subtraction of mRNAs in B48 versus mRNA in B1/B2...
September 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28923505/subcutaneous-infection-by-graphium-basitruncatum-in-a-heart-transplant-patient
#7
Analía L Fernández, Patricia O Andres, Cecilia H Veciño, Claudia B Nagel, María Teresa Mujica
Graphium basitruncatum, a synanamorph of Pseudoallescheria has been rarely reported in human infections. We report a case of subcutaneous phaeohyphomycosis caused by this fungus in a heart transplant recipient. We also describe the phenotypic, molecular methods and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) used to achieve isolate identification.
September 15, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28921905/antibiotic-resistant-escherichia-coli-in-southeastern-australian-pig-herds-and-implications-for-surveillance
#8
L K van Breda, O P Dhungyel, M P Ward
To investigate public health implications of antibiotics to control post-weaning scours, we surveyed 22 commercial pig herds in southeastern Australia. Fifty faecal samples per herd were collected from pre- and post-weaned piglets. Presumptive Escherichia coli isolates were confirmed by MALDI-TOF MS. Isolates (n = 325) were screened for susceptibility to 19 veterinary antibiotics using MIC broth microdilution. All 325 E. coli isolates underwent further testing against 27 antibiotics used in human medicine and were screened for ETEC adhesin and enterotoxin genes (F4 (K88), F5 (K99), F6 (987P), F18, F41, STa, STb, Stx2e and LT) by multiplex PCR...
September 17, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28920176/isolation-and-identification-of-antifungal-peptides-from-bacillus-amyloliquefaciens-w10
#9
Qing-Xia Zhang, Ying Zhang, Hai-Huan Shan, Yun-Hui Tong, Xi-Jun Chen, Feng-Quan Liu
Antifungal metabolites produced by Bacillus sp. W10, which was previously isolated from the tomato rhizosphere, were investigated. Strain W10 was identified as Bacillus amyloliquefaciens by analysis of its 16S rDNA and gyrB gene partial sequences. PCR analysis showed the presence of fenB, sfp, and ituD genes, coding for fengycin, surfactin, and iturin, respectively. A novel small antifungal peptide, designated 5240, produced by this strain was isolated by ammonium sulfate precipitation and Superdex 200 gel filtration chromatography...
September 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28919552/accurate-identification-of-anopheles-gambiae-giles-trophic-preferences-by-maldi-tof-ms
#10
Sirama Niare, Fatalmoudou Tandina, Bernard Davoust, Ogobara Doumbo, Didier Raoult, Philippe Parola, Lionel Almeras
The determination of the trophic preferences of the Anopheles gambiae Giles (Diptera: Culicidae) is a decisive parameter for the monitoring and the prevention of malaria risk transmission. Currently, arthropod blood feeding sources are identified using immunological or molecular biology traditional techniques. Despite the effectiveness of these methods, they present several limitations, and notably, they are time-consuming and costly techniques. A recent study demonstrated that MALDI-TOF MS could be a useful tool for the identification of blood meal origins in freshly engorged mosquitoes...
September 15, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28919458/anthrax-lethal-toxin-letx-neutralization-by-pa-domain-specific-antisera
#11
Monika Verma, Nagendra Suryanarayana, Urmil Tuteja, Kulanthaivel Thavachelvam, M K Rao, Rakesh Bhargawa, Sangeeta Shukla
Anthrax associated causalities in humans and animals are implicated mainly due to the action of two exotoxins that are secreted by the bacterium Bacillus antharcis during the infection. These exotoxins comprise of three protein components namely protective antigen (PA), lethal factor (LF) and edema factor (EF). The protective antigen is the common toxin component required to form both lethal toxin (LeTx) and edema toxin (EdTx). The LeTx is formed, when PA combines with LF and EdTx is formed when PA combines with EF...
September 14, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28917755/identification-of-trypanosomatids-by-detecting-single-nucleotide-fingerprints-using-dna-analysis-by-dynamic-chemistry-with-maldi-tof
#12
María Angélica Luque-González, Mavys Tabraue-Chávez, Bárbara López-Longarela, Rosario María Sánchez-Martín, Matilde Ortiz-González, Miguel Soriano-Rodríguez, José Antonio García-Salcedo, Salvatore Pernagallo, Juan José Díaz-Mochón
Protozoan parasites of the Trypanosomatidae family can cause devastating diseases in humans and animals, such as Human African Trypanosomiasis or Sleeping Sickness, Chagas disease and Leishmaniasis. Currently, there are molecular assays for detecting parasitic infections and their post-treatment monitoring based on nucleic acid amplification, but there are still certain limitations which limit the development of assays that can detect and discriminate between parasite infections with a single test. Here, we present the development of a novel molecular assay for the rapid identification of Trypanosomatids, integrating DNA analysis by dynamic chemistry in conjunction with Matrix-Assisted Laser Desorption Ionization - Time-of-Flight Mass Spectrometry (MALDI-ToF)...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28915941/paper-spray-and-kendrick-mass-defect-analysis-of-block-and-random-ethylene-oxide-propylene-oxide-copolymers
#13
Robert B Cody, Thierry Fouquet
Paper spray ionization coupled with a high-resolution time-of-flight mass spectrometer was applied to the analysis of 13 block and 2 random ethylene oxide/propylene oxide (EO/PO) copolymers as well as to standard samples of poly(ethylene oxide) and poly(propylene oxide) homopolymers. Paper spray mass spectra could be obtained rapidly and, unlike electrospray ionization, were not subject to contamination and sample carryover. For comparison, polyether samples were also measured on a MALDI/TOF system with ultrahigh mass resolving power...
October 9, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28905155/association-of-tlr4-gene-polymorphisms-with-childhood-henoch-sch%C3%A3-nlein-purpura-in-a-chinese-population
#14
Hui Xu, Guizhen Jiang, Hongqiang Shen, Wei Li, Jianhua Mao, Yanxiang Pan
Recent studies demonstrated that aberrant activation of Toll-like receptor (TLR) 4 was involved in the pathogenesis of Henoch-Schönlein purpura (HSP). In this study, we evaluated the association between TLR4 gene polymorphisms and the risk of childhood HSP in a Chinese population. A total of 175 HSP patients and 186 controls were recruited in this case-control study. Three single-nucleotide polymorphisms of the TLR4 gene (rs1927914, rs10759932 and rs1927907) were genotyped using the matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and Sequenom MassARRAY system...
September 13, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28904565/class-1-integrons-and-plasmid-mediated-multiple-resistance-genes-of-the-campylobacter-species-from-pediatric-patient-of-a-university-hospital-in-taiwan
#15
Yi-Chih Chang, Ni Tien, Jai-Sing Yang, Chi-Cheng Lu, Fuu-Jen Tsai, Tsurng-Juhn Huang, I-Kuan Wang
BACKGROUND: The Campylobacter species usually causes infection between humans and livestock interaction via livestock breeding. The studies of the Campylobacter species thus far in all clinical isolates were to show the many kinds of antibiotic phenomenon that were produced. Their integrons cause the induction of antibiotic resistance between bacterial species in the Campylobacter species. RESULTS: The bacterial strains from the diarrhea of pediatric patient which isolated by China Medical University Hospital storage bank...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28904182/finegoldia-magna-isolated-from-orthopedic-joint-implant-associated-infections
#16
Bo Söderquist, Sanna Björklund, Bengt Hellmark, Anders Jensen, Holger Brüggemann
Background: The anaerobic Gram-positive coccus Finegoldia magna is a rare cause of infections of bone and joints. The aim of this study was to describe the microbiological and clinical characteristics of orthopedic implant-associated infections caused by F. magnaMethods: We retrospectively analyzed samples consisting of anaerobic Gram-positive cocci and samples already identified as F. magna from patients with orthopedic infections. The isolates found were determined to species level by MALDI-TOF MS. The antibiotic susceptibility pattern was determined by Etest...
September 13, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28903168/-sharing-bacterial-microbiota-between-owners-and-their-pets-dogs-cats
#17
Jan Wipler, Zuzana Čermáková, Tomáš Hanzálek, Hana Horáková, Helena Žemličková
INTRODUCTION: The microbiological aspect of a relationship between pets (dogs/cats) and their owners is mainly concerned with the incidence of shared bacterial species, in particular potential pathogens. Given the great popularity of sharing homes with pets (dogs/cats) in the Czech Republic, there is an increased possibility of communication between microbiota of the two macroorganisms (pet and owner). The aim of the study was to determine the biodiversity of shared bacteria and possibility of exchange of genes of resistance to antimicrobial agents between potential pathogens based on the close relationship between pets and humans...
June 2017: Klinická Mikrobiologie a Infekc̆ní Lékar̆ství
https://www.readbyqxmd.com/read/28902151/apetx4-a-novel-sea-anemone-toxin-and-a-modulator-of-the-cancer-relevant-potassium-channel-kv10-1
#18
Lien Moreels, Steve Peigneur, Diogo T Galan, Edwin De Pauw, Lászlo Béress, Etienne Waelkens, Luis A Pardo, Loïc Quinton, Jan Tytgat
The human ether-à-go-go channel (hEag1 or KV10.1) is a cancer-relevant voltage-gated potassium channel that is overexpressed in a majority of human tumors. Peptides that are able to selectively inhibit this channel can be lead compounds in the search for new anticancer drugs. Here, we report the activity-guided purification and electrophysiological characterization of a novel KV10.1 inhibitor from the sea anemone Anthopleura elegantissima. Purified sea anemone fractions were screened for inhibitory activity on KV10...
September 13, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28900246/maldi-tof-ms-based-identification-and-molecular-characterization-of-food-associated-methicillin-resistant-staphylococcus-aureus
#19
H M Manukumar, S Umesha
Food-borne methicillin resistant Staphylococcus aureus (MRSA) is involved in two-fold higher mortality rate compared to methicillin susceptible S. aureus (MSSA). Eventhough Mysuru recognized as cleanest city in the world, prevalence of food contamination is not detailed. The aim is to screen food samples from Mysuru area and to characterize MRSA strain, employing MALDI-Biotyper, multiplex PCR to distinguish between MRSA and MSSA by PCR-coupled single strand conformation polymorphism (PCR-SSCP). Of all the food-borne pathogens, S...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28899453/application-of-maldi-tof-ms-systems-in-the-rapid-identification-of-campylobacter-spp-of-public-health-importance
#20
Ying-Hsin Hsieh, Yun F Wang, Hercules Moura, Nancy Miranda, Steven Simpson, Ramnath Gowrishankar, John Barr, Khalil Kerdahi, Irshad M Sulaiman
Campylobacteriosis is an infectious gastrointestinal disease caused by Campylobacter spp.In most cases, it is either underdiagnosed or underreported due to poor diagnostics and limited databases. Several DNA-based molecular diagnostic techniques, including 16S ribosomal RNA (rRNA) sequence typing, have been widely used in the species identification of Campylobacter. Nevertheless, these assays are time-consuming and require a high quality of bacterial DNA. Matrix-assisted laser desorption ionization (MALDI) time-of-flight (TOF) MS is an emerging diagnostic technology that can provide the rapid identification of microorganisms by using their intact cells without extraction or purification...
September 12, 2017: Journal of AOAC International
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