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Pathogen Inactivation

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https://www.readbyqxmd.com/read/28319044/fibroblastic-niches-prime-t-cell-alloimmunity-through-delta-like-notch-ligands
#1
Jooho Chung, Christen L Ebens, Eric Perkey, Vedran Radojcic, Ute Koch, Leonardo Scarpellino, Alexander Tong, Frederick Allen, Sherri Wood, Jiane Feng, Ann Friedman, David Granadier, Ivy T Tran, Qian Chai, Lucas Onder, Minhong Yan, Pavan Reddy, Bruce R Blazar, Alex Y Huang, Todd V Brennan, D Keith Bishop, Burkhard Ludewig, Christian W Siebel, Freddy Radtke, Sanjiv A Luther, Ivan Maillard
Alloimmune T cell responses induce graft-versus-host disease (GVHD), a serious complication of allogeneic bone marrow transplantation (allo-BMT). Although Notch signaling mediated by Delta-like 1/4 (DLL1/4) Notch ligands has emerged as a major regulator of GVHD pathogenesis, little is known about the timing of essential Notch signals and the cellular source of Notch ligands after allo-BMT. Here, we have shown that critical DLL1/4-mediated Notch signals are delivered to donor T cells during a short 48-hour window after transplantation in a mouse allo-BMT model...
March 20, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28315405/location-and-functional-analysis-of-the-aspergillus-nidulans-aurora-kinase-confirm-mitotic-functions-and-suggest-non-mitotic-roles
#2
Colin P De Souza, Shahr B Hashmi, Natalie Hage, Rebecca M Fitch, Aysha H Osmani, Stephen A Osmani
Filamentous fungi have devastating negative impacts as pathogens and agents of food spoilage but also have critical ecological importance and are utilized for industrial applications. The characteristic multinucleate nature of filamentous fungi is facilitated by limiting if, when and where septation, the fungal equivalent of cytokinesis, occurs. In the model filamentous fungus Aspergillus nidulans septation does not occur immediately after mitosis and is an incomplete process resulting in the formation of a septal pore whose permeability is cell cycle regulated...
March 14, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/28315387/functional-role-of-ompf-and-ompc-porins-in-pathogenesis-of-avian-pathogenic-escherichia-coli
#3
Hassan M A Hejair, Yingchu Zhu, Jiale Ma, Yue Zhang, Zihao Pan, Wei Zhang, Huochun Yao
Avian pathogenic Escherichia coli is an important pathogen causes systemic infections in avian species and large economic losses in poultry industry worldwide. The functional role of porins during the infection and their mechanisms of interaction with host tissues for adhesion to and invasion are poorly understood. However, whether porins play a role in infection remains unclear. In this study we evaluated the potential of ompF and ompC outer membrane porins in the pathogenesis of avian pathogenic E. coli (APEC) strain TW-XM...
March 14, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28306518/biochemical-testing-in-a-laboratory-tent-and-semi-intensive-care-of-ebola-patients-on-site-in-a-remote-part-of-guinea-a-paradigm-shift-based-on-a-bleach-sensitive-point-of-care-device
#4
Leonid M Irenge, Jean-Michel Dindart, Jean-Luc Gala
BACKGROUND: During the West Africa Ebola virus disease (EVD) outbreak, a Belgian laboratory was deployed for supporting the Ebola treatment unit (ETU) of N'Zerekore, Guinea. Besides diagnosis of EVD and malaria, biochemical parameters were tested and used to guide supportive treatment of EVD. METHODS: To preserve analytes stability, lithium-heparin blood samples were analyzed using the i-STAT® point-of-care testing (POCT) handheld device without the viral inactivation step...
March 15, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28302524/inactivation-of-bacterial-pathogenic-load-in-compost-against-vermicompost-of-organic-solid-waste-aiming-to-achieve-sanitation-goals-a-review
#5
REVIEW
Nuhaa Soobhany, Romeela Mohee, Vinod Kumar Garg
Waste management strategies for organic residues, such as composting and vermicomposting, have been implemented in some developed and developing countries to solve the problem of organic solid waste (OSW). Yet, these biological treatment technologies do not always result in good quality compost or vermicompost with regards to sanitation capacity owing to the presence of bacterial pathogenic substances in objectionable concentrations. The presence of pathogens in soil conditioners poses a potential health hazard and their occurrence is of particular significance in composts and/or vermicomposts produced from organic materials...
March 13, 2017: Waste Management
https://www.readbyqxmd.com/read/28301479/ligb-subunit-vaccine-confers-sterile-immunity-against-challenge-in-the-hamster-model-of-leptospirosis
#6
Neida L Conrad, Flávia W Cruz McBride, Jéssica D Souza, Marcelle M Silveira, Samuel Félix, Karla S Mendonça, Cleiton S Santos, Daniel A Athanazio, Marco A Medeiros, Mitermayer G Reis, Odir A Dellagostin, Alan J A McBride
Neglected tropical diseases, including zoonoses such as leptospirosis, have a major impact on rural and poor urban communities, particularly in developing countries. This has led to major investment in antipoverty vaccines that focus on diseases that influence public health and thereby productivity. While the true, global, impact of leptospirosis is unknown due to the lack of adequate laboratory diagnosis, the WHO estimates that incidence has doubled over the last 15 years to over 1 million cases that require hospitalization every year...
March 16, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28301246/persistence-of-highly-pathogenic-and-low-pathogenic-avian-influenza-viruses-in-footbaths-and-poultry-manure
#7
R Hauck, B Crossley, D Rejmanek, H Zhou, R A Gallardo
A questionnaire was designed in order to gather information about bedding material and footbath preparation and maintenance in different productive units across the state of California.This information was used to plan two experiments. In the first experiment, we tested the effectiveness of footbaths in inactivating highly pathogenic (HP) and low pathogenic (LP) avian influenza viruses (AIVs) on rubber boots. Surprisingly, quaternary ammonia- and quaternary ammonia + glutaraldehyde-based footbaths were not able to eliminate live HPAIV (H5N8) and LPAIV (H6N2) particles on boots, while a chlorine-based granulated disinfectant was able to destroy the virus at contact...
March 2017: Avian Diseases
https://www.readbyqxmd.com/read/28295247/targeting-c3a-c5a-receptors-inhibits-human-mesangial-cell-proliferation-and-alleviates-iga-nephropathy-in-mice
#8
Ying Zhang, Xianli Yan, Ting Zhao, Qihe Xu, Qi Peng, Ruimin Hu, Songxia Quan, Yali Zhou, Guolan Xing
Complement activation has a deep pathogenic influence in IgA nephropathy (IgAN). C3a and C5a, small cleavage fragments generated by complement activation, are key mediators of inflammation. The fragments exert broad pro-inflammatory effects by binding to specific receptors (C3aR and C5aR, respectively). However, no studies thus far have investigated the effects of C3a, C5a and their receptors on IgAN. We observed that C3aR and C5aR antagonists repressed IgA-induced cell proliferation and IL-6 and MCP-1 production in cultured human mesangial cells (HMCs)...
March 15, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28290220/specific-antibody-mediated-immunity-in-the-reproductive-tract-of-laying-chickens-immunized-against-newcastle-disease-with-conventional-attenuated-and-inactivated-vaccines
#9
F Rauw, T G Nguyen, E Ngabirano, S Marché, B Lambrecht
Despite the widespread and successful use of Newcastle disease (ND) vaccines, Newcastle disease virus (NDV) can seriously injure the reproductive tract of egg-laying hens, leading to rapid egg-drop and poor shell quality. Few published studies investigated local NDV-specific immune response in the reproductive tract after ND-vaccination of hens. The present study investigated, for the first time, local NDV-specific antibody-mediated immunity in segments of the oviduct during the laying period. Specific pathogen-free (SPF) White Leghorn chickens were immunized following a ND vaccination program applied in the field, which combined ND-attenuated vaccine (inoculated subcutaneously at one day, 2 weeks and 11 weeks of age) with inactivated vaccine (inoculated intramuscularly at 17 weeks)...
March 14, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28286319/establishment-of-crispr-cas9-in-alternaria-alternata
#10
Maximilian Wenderoth, Christoph Pinecker, Benjamin Voß, Reinhard Fischer
The filamentous fungus Alternaria alternata is a potent producer of many secondary metabolites, some of which like alternariol or alternariol-methyl ether are toxic and/or cancerogenic. Many Alternaria species do not only cause post-harvest losses of food and feed, but are aggressive plant pathogens. Despite the great economic importance and the large number of research groups working with the fungus, the molecular toolbox is rather underdeveloped. Gene deletions often result in heterokaryotic strains and therefore, gene-function analyses are rather tedious...
March 10, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/28286292/metabolic-engineering-of-escherichia-coli-for-the-production-of-2-fucosyllactose-and-3-fucosyllactose-through-modular-pathway-enhancement
#11
Di Huang, Kexin Yang, Jia Liu, Yingying Xu, Yuanyuan Wang, Ru Wang, Bin Liu, Lu Feng
Fucosyllactoses, including 2'-fucosyllactose (2'-FL) and 3-fucosyllactose (3-FL), are important oligosaccharides in human milk that are commonly used as nutritional additives in infant formula due to their biological functions, such as the promotion of bifidobacteria growth, inhibition of pathogen infection, and improvement of immune response. In this study, we developed a synthetic biology approach to promote the efficient biosynthesis of 2'-FL and 3-FL in engineered Escherichia coli. To boost the production of 2'-FL and 3-FL, multiple modular optimization strategies were applied in a plug-and-play manner...
March 9, 2017: Metabolic Engineering
https://www.readbyqxmd.com/read/28285864/e-coli-reca-gene-improves-gene-targeted-homologous-recombination-in-mycoplasma-hyorhinis
#12
Hassan Z A Ishag, Qiyan Xiong, Maojun Liu, Zhixin Feng, Guoqing Shao
Mycoplasma hyorhinis is an opportunistic pathogen of pigs. Recently, it has been shown to transform cell cultures, increasing the attention of the researchers. Studies on the pathogenesis require specific genetic tool that is not yet available for the pathogen. To address this limitation, we constructed two suicide plasmids pGEMT-tetM/LR and pGEMT-recA-tetM/LR having a tetracycline resistance marker flanked by two hemolysin gene arms. The latter plasmid encodes an E. coli recA, a gene involved in DNA recombination, repair and maintenance of DNA...
March 8, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28285115/teriyaki-sauce-with-carvacrol-or-thymol-effectively-controls-escherichia-coli-o157-h7-listeria-monocytogenes-salmonella-typhimurium-and-indigenous-flora-in-marinated-beef-and-marinade
#13
Hyeree Moon, Nam Hee Kim, Soon Han Kim, Younghoon Kim, Jee Hoon Ryu, Min Suk Rhee
An effective bactericidal cold-marinating method for beef products is described, exploiting the synergism between soy sauce and natural compounds (carvacrol, CV or thymol, TM) to reduce microbiological risks. Beef slices inoculated with Escherichia coli O157:H7, Listeria monocytogenes, and Salmonella Typhimurium (3.1-3.5logCFU/g) were marinated in a teriyaki sauce with or without CV and TM (0.3 and 0.5%). After 1, 3, and 7days at 4°C, indigenous microflora population, color, lipid oxidation, marinade uptake, and pH of marinated beef and leftover marinade samples were examined...
March 6, 2017: Meat Science
https://www.readbyqxmd.com/read/28283526/mechanisms-of-inactivation-of-dry-escherichia-coli-by-high-pressure-carbon-dioxide
#14
Yuan Yao Chen, Feral Temelli, Michael G Gänzle
High pressure carbon dioxide processing is a promising technology for non-thermal food preservation. However, few studies determined the lethality of high pressure CO2 on dry bacterial cells, and the mechanism of inactivation remains unknown. This study explored mechanisms of inactivation by using Escherichia coli AW1.7 and mutant strains differing in heat and acid resistance, and in membrane composition based on disruption of the locus of heat resistance, and genes coding for glutamate decarboxylases and cyclopropane fatty acid synthase, respectively...
March 10, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28279176/palb2-mutations-in-brca1-2-mutation-negative-breast-and-ovarian-cancer-patients-from-poland
#15
Anna Kluska, Aneta Balabas, Magdalena Piatkowska, Katarzyna Czarny, Katarzyna Paczkowska, Dorota Nowakowska, Michal Mikula, Jerzy Ostrowski
BACKGROUND: The PALB2 gene encodes a protein that plays a crucial role in maintaining genomic integrity. Germline inactivating mutations in PALB2 are associated with an increased risk of breast and ovarian cancer. The prevalence and spectrum of recurrent PALB2 germline mutations in breast and ovarian cancer patients from Poland is not clearly defined. METHODS: PALB2 exons were amplified from 460 BRCA1/2-mutation negative women with familial breast and/or ovarian cancer and early-onset breast cancer using AmpliSeq technology and sequenced on an Ion Torrent PGM sequencer...
March 9, 2017: BMC Medical Genomics
https://www.readbyqxmd.com/read/28275586/colistin-resistance-in-acinetobacter-baumannii-mdr-zj06-revealed-by-a-multiomics-approach
#16
Xiaoting Hua, Lilin Liu, Youhong Fang, Qiucheng Shi, Xi Li, Qiong Chen, Keren Shi, Yan Jiang, Hua Zhou, Yunsong Yu
Acinetobacter baumannii has emerged as an important opportunistic pathogen due to its ability to acquire resistance to most currently available antibiotics. Colistin is often considered as the last line of therapy for infections caused by multidrug-resistant A. baumannii (MDRAB). However, colistin-resistant A. baumannii strain has recently been reported. To explore how multiple drug-resistant A. baumannii responded to colistin resistance, we compared the genomic, transcriptional and proteomic profile of A. baumannii MDR-ZJ06 to the induced colistin-resistant strain ZJ06-200P5-1...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28274639/a-recombinant-subunit-vaccine-for-bovine-rsv-and-histophilus-somni-protects-calves-against-dual-pathogen-challenge
#17
Laurel J Gershwin, Nicole E Behrens, Heather A McEligot, Francisco R Carvallo-Chaigneau, Lauren T Crum, Brianna M Gunnarson, Lynette B Corbeil
Bovine respiratory syncytial virus (BRSV) and Histophilus somni synergize to cause respiratory disease in cattle. These pathogens cause enhanced disease during dual-infection and an IgE response to antigens of H. somni in dual-infected but not singly infected calves. Vaccines containing whole inactivated BRSV or H. somni have been associated with IgE responses A vaccine strategy that avoids stimulation of IgE antibodies would provide superior protection from dual infection. We hypothesized that a subunit vaccine consisting of the nucleoprotein (NP) from BRSV and the recombinant antigen IbpA DR2 (a surface antigen of H...
March 5, 2017: Vaccine
https://www.readbyqxmd.com/read/28274236/isolation-and-genetic-characterization-of-a-novel-2-2-1-2a-h5n1-virus-from-a-vaccinated-meat-turkeys-flock-in-egypt
#18
Ahmed H Salaheldin, Jutta Veits, Hatem S Abd El-Hamid, Timm C Harder, Davud Devrishov, Thomas C Mettenleiter, Hafez M Hafez, Elsayed M Abdelwhab
BACKGROUND: Vaccination of poultry to control highly pathogenic avian influenza virus (HPAIV) H5N1 is used in several countries. HPAIV H5N1 of clade 2.2.1 which is endemic in Egypt has diversified into two genetic clades. Clade 2.2.1.1 represents antigenic drift variants in vaccinated commercial poultry while clade 2.2.1.2 variants are detected in humans and backyard poultry. Little is known about H5N1 infection in vaccinated turkeys under field conditions. CASE PRESENTATION: Here, we describe an HPAI H5N1 outbreak in a vaccinated meat-turkey flock in Egypt...
March 9, 2017: Virology Journal
https://www.readbyqxmd.com/read/28274217/disruption-of-rcsb-by-a-duplicated-sequence-in-a-curli-producing-escherichia-coli-o157-h7-results-in-differential-gene-expression-in-relation-to-biofilm-formation-stress-responses-and-metabolism
#19
V K Sharma, D O Bayles, D P Alt, T Looft, B W Brunelle, J A Stasko
BACKGROUND: Escherichia coli O157:H7 (O157) strain 86-24, linked to a 1986 disease outbreak, displays curli- and biofilm-negative phenotypes that are correlated with the lack of Congo red (CR) binding and formation of white colonies (CR(-)) on a CR-containing medium. However, on a CR medium this strain produces red isolates (CR(+)) capable of producing curli fimbriae and biofilms. RESULTS: To identify genes controlling differential expression of curli fimbriae and biofilm formation, the RNA-Seq profile of a CR(+) isolate was compared to the CR(-) parental isolate...
March 8, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28273167/staphylococcal-protein-ecb-impairs-complement-receptor-1-mediated-recognition-of-opsonized-bacteria
#20
Hanne Amdahl, Karita Haapasalo, Lydia Tan, Taru Meri, Pentti I Kuusela, Jos A van Strijp, Suzan Rooijakkers, T Sakari Jokiranta
Staphyloccus aureus is a major human pathogen leading frequently to sepsis and soft tissue infections with abscesses. Multiple virulence factors including several immune modulating molecules contribute to its survival in the host. When S. aureus invades the human body, one of the first line defenses is the complement system, which opsonizes the bacteria with C3b and attract neutrophils by release of chemotactic peptides. Neutrophils express Complement receptor-1 [CR1, CD35) that interacts with the C3b-opsonized particles and thereby plays an important role in pathogen recognition by phagocytic cells...
2017: PloS One
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