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https://www.readbyqxmd.com/read/28926983/expression-of-the-grape-vasts19-gene-in-arabidopsis-improves-resistance-to-powdery-mildew-and-botrytis-cinerea-but-increases-susceptibility-to-pseudomonas-syringe-pv-tomato-dc3000
#1
Yaqiong Wang, Dejun Wang, Fan Wang, Li Huang, Xiaomin Tian, Steve van Nocker, Hua Gao, Xiping Wang
Stilbene synthase (STS) is a key enzyme that catalyzes the biosynthesis of resveratrol compounds and plays an important role in disease resistance. The molecular pathways linking STS with pathogen responses and their regulation are not known. We isolated an STS gene, VaSTS19, from a Chinese wild grape, Vitis amurensis Rupr. cv. "Tonghua-3", and transferred this gene to Arabidopsis. We then generated VaSTS19-expressing Arabidopsis lines and evaluated the functions of VaSTS19 in various pathogen stresses, including powdery mildew, B...
September 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28924346/co-delivery-of-polyinosinic-polycytidylic-acid-and-flagellin-by-poly-lactic-co-glycolic-acid-mps-synergistically-enhances-immune-response-elicited-by-intranasally-delivered-hepatitis-b-surface-antigen
#2
Xiaojing Dai, Jintian He, Ruxia Zhang, Guanghao Wu, Fangfang Xiong, Baohua Zhao
The aim of the present work was to investigate the synergistic effect between toll-like receptor (TLR) 3 ligand polyinosinic:polycytidylic acid (pI:C) and TLR5 ligand flagellin (FLN) on immune responses induced by nasally delivered hepatitis B virus surface antigen (HBsAg). Mannan and chitosan oligosaccharide-modified, pH-responsive poly(lactic-co-glycolic acid) (MC-PLGA) microparticles (MPs) containing HBsAg, FLN, pI:C or both ligands were prepared with a double-emulsion method. In vitro uptake experiments show that cellular uptake of MC-PLGA MPs by macrophages was through energy-dependent, receptor-mediated endocytosis mechanism...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28924222/conjugation-of-wildtype-and-hypoallergenic-mugwort-allergen-art-v-1-to-flagellin-induces-il-10-dc-and-suppresses-allergen-specific-th2-responses-in-vivo
#3
Schülke Stefan, Kuttich Kirsten, Wolfheimer Sonja, Duschek Nadine, Wangorsch Andrea, Reuter Andreas, Briza Peter, Pablos Isabel, Gadermaier Gabriele, Ferreira Fatima, Vieths Stefan, Toda Masako, Scheurer Stephan
Allergies to weed pollen including members of the Compositae family, such as mugwort, ragweed, and feverfew are spreading worldwide. To efficiently treat these newly arising allergies, allergen specific immunotherapy needs to be improved. Therefore, we generated novel vaccine candidates consisting of the TLR5-ligand Flagellin A from Listeria and the major mugwort allergen Art v 1 including either the wild type Art v 1 sequence (rFlaA:Artv1) or a hypoallergenic variant (rFlaA:Artv1(hyp)) with reduced IgE-binding capacity...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912644/tlr5-activation-through-nf-%C3%AE%C2%BAb-is-a-neuroprotective-mechanism-of-postconditioning-after-cerebral-ischemia-in-mice
#4
Jaewon Jeong, Soojin Kim, Da-Sol Lim, Seo-Hea Kim, Heeju Doh, So-Dam Kim, Yun Seon Song
Postconditioning has been shown to protect the mouse brain from ischemic injury. However, the neuroprotective mechanisms of postconditioning remain elusive. We have found that toll-like receptor 5 (TLR5) plays an integral role in postconditioning-induced neuroprotection through Akt/nuclear factor kappa B (NF-κB) activation in cerebral ischemia. Compared to animals that received 30 min of transient middle cerebral artery occlusion (tMCAO) group, animals that also underwent postconditioning showed a significant reduction of up to 60...
August 2017: Experimental Neurobiology
https://www.readbyqxmd.com/read/28911210/a20-an-essential-component-of-the-ubiquitin-editing-protein-complex-is-a-negative-regulator-of-inflammation-in-human-myometrium-and-foetal-membranes
#5
Martha Lappas
STUDY QUESTION: Does A20 regulate mediators involved in the terminal processes of human labour in primary myometrial and amnion cells? SUMMARY ANSWER: A20 is a nuclear factor-kappa B (NF-κB) responsive gene that acts as a negative regulator of NF-κB-induced expression of pro-labour mediators. WHAT IS KNOWN ALREADY: Inflammation is commonly implicated in spontaneous preterm birth and the processes involved in rupture of foetal membranes and uterine contractions...
September 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28901470/tlr5-7-mediated-pi3k-activation-triggers-epithelial-mesenchymal-transition-of-ovarian-cancer-cells-through-wave3-dependent-mesothelin-or-oct4-sox2-expression
#6
Ga Bin Park, Daejin Kim
Toll-like receptor (TLR)-mediated signaling induces cell migration or invasion in several tumors and various stages of cancer. Interactions of mesothelin, a 40-kDa cell surface glycoprotein, with cancer antigen 125 (CA125) is associated with drug resistance, metastasis, and poor clinical outcome of ovarian cancer patients. In this study, we examined the role of TLR5 and TLR7 in the metastasis of ovarian cancer through the induction of mesothelin/CA125 expression and investigated its underlying mechanism. TLR5 agonist (flagellin) and TLR7 agonist (imiquimod) upregulated mesenchymal phenotypes and produced epithelial-mesenchymal transition (EMT)-related cytokines in the SKOV3 cells; however, TLR7 expressing CaOV3 cells had no response to the specific ligand, imiquimod, for enhancing its EMT processes...
September 6, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28900095/discovery-of-a-proteolytic-flagellin-family-in-diverse-bacterial-phyla-that-assembles-enzymatically-active-flagella
#7
Ulrich Eckhard, Hina Bandukwala, Michael J Mansfield, Giada Marino, Jiujun Cheng, Iain Wallace, Todd Holyoak, Trevor C Charles, John Austin, Christopher M Overall, Andrew C Doxey
Bacterial flagella are cell locomotion and occasional adhesion organelles composed primarily of the polymeric protein flagellin, but to date have not been associated with any enzymatic function. Here, we report the bioinformatics-driven discovery of a class of enzymatic flagellins that assemble to form proteolytically active flagella. Originating by a metallopeptidase insertion into the central flagellin hypervariable region, this flagellin family has expanded to at least 74 bacterial species. In the pathogen, Clostridium haemolyticum, metallopeptidase-containing flagellin (which we termed flagellinolysin) is the second most abundant protein in the flagella and is localized to the extracellular flagellar surface...
September 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28894188/second-generation-flagellin-rpac-fusion-protein-kfd2-rpac-shows-high-protective-efficacy-against-dental-caries-with-low-potential-side-effects
#8
Jingyi Yang, Ying Sun, Rong Bao, Dihan Zhou, Yi Yang, Yuan Cao, Jie Yu, Bali Zhao, Yaoming Li, Huimin Yan, Maohua Zhong
Dental caries is one of the most common global chronic diseases affecting all ages of the population; thus a vaccine against caries is urgently needed. Our previous studies demonstrated that a fusion protein, KF-rPAc, in which rPAc of S. mutans is directly fused to the C-terminal of E. coli-derived flagellin (KF), could confer high prophylactic and therapeutic efficiency against caries. However, possible side effects, including the high antigenicity of flagellin and possible inflammatory injury induced by flagellin, may restrict its clinical usage...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28891023/variation-of-mucin-adhesion-cell-surface-characteristics-and-molecular-mechanisms-among-lactobacillus-plantarum-isolated-from-different-habitats
#9
Nirunya Buntin, Willem M de Vos, Tipparat Hongpattarakere
The adhesion ability to mucin varied greatly among 18 Lactobacillus plantarum isolates depending on their isolation habitats. Such ability remained at high level even though they were sequentially exposed to the gastrointestinal (GI) stresses. The majority of L. plantarum isolated from shrimp intestine and about half of food isolates exhibited adhesion ability (51.06-55.04%) about the same as the well-known adhesive L. plantarum 299v. Interestingly, five infant isolates of CIF17A2, CIF17A4, CIF17A5, CIF17AN2, and CIF17AN8 exhibited extremely high adhesion ranging from 62...
September 11, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28887725/recombinant-flagellin-pal-fusion-protein-of-legionella-pneumophila-induced-cell-mediated-and-protective-immunity-against-bacteremia-in-balb-c-mice
#10
Ashraf Mohabati Mobarez, Roya Ahmadrajabi, Nima Khoramabadi, Ali Hatef Salmanian
We report a new recombinant fusion protein composed of full-length Legionella pneumophila flagellin A and peptidoglycan-associated lipoprotein (PAL), rFLA-PAL, capable of inducing protective immunity against L. pneumophila. The recombinant protein was over expressed in Escherichia coli strain BL21 (DE3) using pET-28a (+) expression vector (pET28a-flaA-pal) and purified by Ni(2+) exchange chromatography. Immunological properties of rFLA-PAL were assessed in a mouse model. Female BALB/c mice, immunized with rFLA-PAL, exhibited a rapid increase in serum antibody concentration against each of its protein portions...
September 8, 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28887442/targeting-deficiencies-in-the-tlr5-mediated-vaginal-response-to-treat-female-recurrent-urinary-tract-infection
#11
Ased S M Ali, Catherine Mowbray, Marcelo Lanz, Anna Stanton, Samantha Bowen, Claire L Varley, Paul Hilton, Karen Brown, Wendy Robson, Jennifer Southgate, Phillip D Aldridge, Alison Tyson-Capper, Soman Abraham, Robert S Pickard, Judith Hall
The identification of the host defence peptides as target effectors in the innate defence of the uro-genital tract creates new translational possibilities for immunomodulatory therapies, specifically vaginal therapies to treat women suffering from rUTI, particularly those carrying the TLR5_C1174T SNP. Urinary tract infections (UTIs) are a microbial disease reported worldwide. Women are particularly susceptible with many suffering debilitating recurrent (r) infections. Treatment is by antibiotics, but such therapy is linked to antibiotic resistance and re-infection...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28886863/critical-role-of-mammalian-target-of-rapamycin-for-il-10-dendritic-cell-induction-by-a-flagellin-a%C3%A2-conjugate-in-preventing-allergic-sensitization
#12
Stefan Schülke, Anna-Helena Fiedler, Ann-Christine Junker, Adam Flaczyk, Sonja Wolfheimer, Andrea Wangorsch, Anke Heinz, Hendrik Beckert, Birgit Nagl, Barbara Bohle, Stefan Vieths, Masako Toda, Stephan Scheurer
BACKGROUND: Fusion proteins incorporating the Toll-like receptor 5 ligand flagellin are currently undergoing clinical trials as vaccine candidates for many diseases. OBJECTIVE: We studied the mechanisms of immune modulation by a flagellin:allergen fusion protein containing the Toll-like receptor 5 ligand flagellin A from Listeria monocytogenes and the birch pollen allergen Bet v 1 (recombinant flagellin A [rFlaA]:Betv1). METHODS: BALB/c mice were vaccinated with rFlaA:Betv1 in an experimental Bet v 1 sensitization model...
August 25, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28874555/a-trans-acting-leader-rna-from-a-salmonella-virulence-gene
#13
Eunna Choi, Yoontak Han, Yong-Joon Cho, Daesil Nam, Eun-Jin Lee
Bacteria use flagella to move toward nutrients, find its host, or retract from toxic substances. Because bacterial flagellum is one of the ligands that activate the host innate immune system, its synthesis should be tightly regulated during host infection, which is largely unknown. Here, we report that a bacterial leader mRNA from the mgtCBR virulence operon in the intracellular pathogen Salmonella enterica serovar Typhimurium binds to the fljB coding region of mRNAs in the fljBA operon encoding the FljB phase 2 flagellin, a main component of bacterial flagella and the FljA repressor for the FliC phase 1 flagellin, and degrades fljBA mRNAs in an RNase E-dependent fashion during infection...
September 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28868219/appraisal-of-biochemical-classes-of-radioprotectors-evidence-current-status-and-guidelines-for-future-development
#14
REVIEW
Krishnanand Mishra, Ghazi Alsbeih
The search for efficient radioprotective agents to protect from radiation-induced toxicity, due to planned or accidental radiation exposure, is still ongoing worldwide. Despite decades of research and development of widely different biochemical classes of natural and derivative compounds, a safe and effective radioprotector is largely unmet. In this comprehensive review, we evaluated the evidence for the radioprotective performance of classical thiols, vitamins, minerals, dietary antioxidants, phytochemicals, botanical and bacterial preparations, DNA-binding agents, cytokines, and chelators including adaptogens...
October 2017: 3 Biotech
https://www.readbyqxmd.com/read/28860663/bacterial-flagellin-a-potent-immunomodulatory-agent
#15
REVIEW
Irshad A Hajam, Pervaiz A Dar, Imam Shahnawaz, Juan Carlos Jaume, John Hwa Lee
Flagellin is a subunit protein of the flagellum, a whip-like appendage that enables bacterial motility. Traditionally, flagellin was viewed as a virulence factor that contributes to the adhesion and invasion of host cells, but now it has emerged as a potent immune activator, shaping both the innate and adaptive arms of immunity during microbial infections. In this review, we summarize our understanding of bacterial flagellin and host immune system interactions and the role flagellin as an adjuvant, anti-tumor and radioprotective agent, and we address important areas of future research interests...
September 1, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28854596/comparative-genomic-analysis-identifies-a-campylobacter-clade-deficient-in-selenium-metabolism
#16
William G Miller, Emma Yee, Bruno S Lopes, Mary H Chapman, Steven Huynh, James L Bono, Craig T Parker, Norval J C Strachan, Ken J Forbes
The nonthermotolerant Campylobacter species C. fetus, C. hyointestinalis, C. iguaniorum, and C. lanienae form a distinct phylogenetic cluster within the genus. These species are primarily isolated from foraging (swine) or grazing (e.g., cattle, sheep) animals and cause sporadic and infrequent human illness. Previous typing studies identified three putative novel C. lanienae-related taxa, based on either MLST or atpA sequence data. To further characterize these putative novel taxa and the C. fetus group as a whole, 76 genomes were sequenced, either to completion or to draft level...
July 1, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28853261/-expression-and-assembly-of-chimeric-flagellins-in-escherichia-coli-bl21-de3-and-salmonella
#17
Maozhi Hu, Zhiming Pan, Yun Yang, Chuang Meng, Lei Zhang, Shizhong Geng, Xin'an Jiao
Flagellin can be expressed in monomeric or polymeric form based on assembly. The difference of these two forms of flagellin is less studied. In this experiment, recombinant plasmid pET-fliC/M2e2 was transferred into Escherichia coli BL21(DE3) and Salmonella SL5928 to express chimeric flagellin, mfliC/M and pfliC/M, respectively, and then their assembly characteristics were analyzed. Sodium dodecyl sulfate polyacrylamide gel electrophoresis results indicated that the two recombinant bacteria could successfully express chimeric flagellin...
August 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28851935/bacteria-as-bio-template-for-3d-carbon-nanotube-architectures
#18
Sehmus Ozden, Isaac G Macwan, Peter S Owuor, Suppanat Kosolwattana, Pedro A S Autreto, Sushila Silwal, Robert Vajtai, Chandra S Tiwary, Aditya D Mohite, Prabir K Patra, Pulickel M Ajayan
It is one of the most important needs to develop renewable, scalable and multifunctional methods for the fabrication of 3D carbon architectures. Even though a lot of methods have been developed to create porous and mechanically stable 3D scaffolds, the fabrication and control over the synthesis of such architectures still remain a challenge. Here, we used Magnetospirillum magneticum (AMB-1) bacteria as a bio-template to fabricate light-weight 3D solid structure of carbon nanotubes (CNTs) with interconnected porosity...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28851870/sde5-a-putative-rna-export-protein-participates-in-plant-innate-immunity-through-a-flagellin-dependent-signaling-pathway-in-arabidopsis
#19
Mohammad Nazim Uddin, Salina Akhter, Rupak Chakraborty, Ji Hyeong Baek, Joon-Yung Cha, Su Jung Park, Hunseung Kang, Woe-Yeon Kim, Sang Yeol Lee, David Mackey, Min Gab Kim
In eukaryotes, RNA silencing, mediated by small interfering RNAs, is an evolutionarily widespread and versatile silencing mechanism that plays an important role in various biological processes. Increasing evidences suggest that various components of RNA silencing pathway are involved in plant defense machinery against microbial pathogens in Arabidopsis thaliana. Here, we show genetic and molecular evidence that Arabidopsis SDE5 is required to generate an effective resistance against the biotrophic bacteria Pseudomonas syringae pv...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28845044/flagellin-a-unique-microbe-associated-molecular-pattern-and-a-multi-faceted-immunomodulator
#20
Maohua Zhong, Huimin Yan, Yaoming Li
No abstract text is available yet for this article.
August 28, 2017: Cellular & Molecular Immunology
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