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toll like receptors

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https://www.readbyqxmd.com/read/28239665/myeloid-12-15-lox-regulates-b-cell-numbers-and-innate-immune-antibody-levels-in-vivo
#1
Sarah N Lauder, Victoria J Tyrrell, Keith Allen-Redpath, Maceler Aldrovandi, David Gray, Peter Collins, Simon A Jones, Philip R Taylor, Valerie O'Donnell
Background. The myeloid enzyme 12/15-lipoxygenase (LOX), which generates bioactive oxidized lipids, has been implicated in numerous inflammatory diseases, with several studies demonstrating an improvement in pathology in mice lacking the enzyme. However, the ability of 12/15-LOX to directly regulate B cell function has not been studied. Methods. The influence of 12/15-LOX on B cell phenotype and function, and IgM generation, was compared using wildtype (WT) and 12/15-LOX (Alox15(-/-)) deficient mice. The proliferative and functional capacity of splenic CD19(+) B cells was measured in vitro in response to various toll-like receptor agonists...
January 4, 2017: Wellcome Open Res
https://www.readbyqxmd.com/read/28239458/erratum-to-over-expression-of-toll-like-receptor-2-up-regulates-heme-oxygenase-1-expression-and-decreases-oxidative-injury-in-dairy-goats
#2
Shoulong Deng, Kun Yu, Wuqi Jiang, Yan Li, Sutian Wang, Zhuo Deng, Yuchang Yao, Baolu Zhang, Guoshi Liu, Yixun Liu, Zhengxing Lian
[This corrects the article DOI: 10.1186/s40104-016-0136-2.].
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28238930/the-acute-exposure-of-tetrachloro-p-benzoquinone-a-k-a-chloranil-triggers-inflammation-and-neurological-dysfunction-via-toll-like-receptor-4-signaling-the-protective-role-of-melatonin-preconditioning
#3
Juanli Fu, Xiaomin Xia, Zixuan Liu, Yawen Wang, Yuxin Wang, Qiong Shi, Xiufang Song, Erqun Song, Yang Song
This study is aimed to investigate the inflammation and neurological dysfunction induced by tetrachloro-p-benzoquinone (TCBQ) through Toll-like receptor 4 (TLR4) signaling. We also investigated the protective role of melatonin as an antioxidant and anti-inflammatory agent. In vitro model was established by rat pheochromocytoma PC12 cells, meanwhile, TLR4 wild-type (C57BL/6) and knockout mice (C57BL/10ScNJ TLR4(-/-)) were used as in vivo model. In vitro study showed TCBQ exposure enhanced the expression of TLR4, myeloid differentiation factor 88 (MyD88) at both transcriptional and post-transcriptional levels...
February 23, 2017: Toxicology
https://www.readbyqxmd.com/read/28238855/mkp-1-negatively-regulates-lps-mediated-il-1%C3%AE-production-through-p38-activation-and-hif-1%C3%AE-expression
#4
Harvinder Talwar, Christian Bauerfeld, Mohamad Bouhamdan, Pershang Farshi, Yusen Liu, Lobelia Samavati
Interleukin 1 beta (IL-1β) is a pro-inflammatory cytokine that plays a major role in inflammatory diseases as well as cancer. The inflammatory response after Toll-like receptor (TLR) 4 activation is tightly regulated through phosphorylation of MAP kinases, including p38 and JNK pathways. The activation of MAP kinases is negatively regulated by MAPK phosphatases (MKPs). MKP-1 preferentially dephosphorylates p38 and JNK. IL-1β is regulated through the activation of MAPK, including p38 as well as several transcription factors...
February 23, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28238753/glucocorticoid-induced-leucine-zipper-overexpression-inhibits-lipopolysaccharide-induced-retinal-inflammation-in-rats
#5
Ruiping Gu, Boya Lei, Qinmeng Shu, Gang Li, Gezhi Xu
Glucocorticoid-induced leucine zipper (GILZ) mediates several effects of glucocorticoids and has important anti-inflammatory properties. Here, we explored the role of GILZ in inhibiting retinal inflammation. Endotoxin-induced uveitis (EIU) was established in rats by intravitreal injection of lipopolysaccharide (LPS). GILZ levels decreased in the EIU retina at 4 h after LPS injection and slowly recovered within 24 h. Retinal GILZ was downregulated by recombinant lentivirus-delivered short-hairpin RNA targeting GILZ (shRNA-GILZ-rLV) and upregulated by recombinant lentivirus-mediated GILZ overexpression (Oe-GILZ-rLV)...
February 24, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28237889/giardia-duodenalis-induces-dysbiosis-of-human-intestinal-microbiota-biofilms
#6
Jennifer K Beatty, Sarah V Akierman, Jean-Paul Motta, Stacy Muise, Matthew L Workentine, Joe J Harrison, Amol Bhargava, Paul L Beck, Kevin P Rioux, Gordon Webb McKnight, John L Wallace, Andre G Buret
Giardia duodenalis is a prevalent cause of acute diarrheal disease worldwide. However, recent outbreaks in Italy and Norway have revealed a link between giardiasis and the subsequent development of chronic post-infectious irritable bowel syndrome (PI-IBS). While the mechanisms underlying the causation of PI-IBS remain obscure, recent findings suggest that alterations in gut microbiota communities are linked to the pathophysiology of IBS. In the present study, we use a laboratory biofilm system to culture and enrich mucosal microbiota from human intestinal biopsies...
February 22, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28237711/pharmacological-inhibition-of-faah-modulates-tlr-induced-neuroinflammation-but-not-sickness-behaviour-an-effect-partially-mediated-by-central-trpv1
#7
Rebecca J Henry, Daniel M Kerr, Lisa E Flannery, Marykate Killilea, Edel M Hughes, Louise Corcoran, David P Finn, Michelle Roche
Aberrant activation of toll-like receptors (TLRs), key components of the innate immune system, has been proposed to underlie and exacerbate a range of central nervous system disorders. Increasing evidence supports a role for the endocannabinoid system in modulating inflammatory responses including those mediated by TLRs, and thus this system may provide an important treatment target for neuroinflammatory disorders. However, the effect of modulating endocannabinoid tone on TLR-induced neuroinflammation in vivo and associated behavioural changes is largely unknown...
February 22, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28236763/palmatine-inhibits-trif-dependent-nf-%C3%AE%C2%BAb-pathway-against-inflammation-induced-by-lps-in-goat-endometrial-epithelial-cells
#8
Baoqi Yan, Dongsheng Wang, Shuwei Dong, Zhangrui Cheng, Lidong Na, Mengqi Sang, Hongzao Yang, Zhiqiang Yang, Shidong Zhang, Zuoting Yan
Palmatine, a natural pharmaceutical drug, possesses many biological activities. But its clinical application is rarely reported in the veterinary medicine. The aim of this study was to investigate the anti-inflammatory effects of palmatine on lipopolysaccharide (LPS)-induced inflammation in goat endometrial epithelial cells (gEECs), and the possible molecular mechanisms. Palmatine cell toxicity was determined by MTT assay, and the production of inflammatory cytokine in the cultured medium was measured with ELISA, qRT-PCR and Western blotting...
February 21, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28236541/immune-response-of-toddlers-with-history-of-prematurity
#9
S P Muraro, P M Pitrez, A P D de Souza, B N Porto, J E Vargas, I P Ewald, J P Heinzmann-Filho, G Dos Santos, T S Baptista, T D Gandolfi, F D Machado, M H Jones, C Bonorino, R T Stein
BACKGROUND: It is not quite well established how immune responses differ in term and preterm infants beyond the first year of life. This study aimed to evaluate aspects of the innate and adaptive immune responses in a group of preterm infants in comparison with their term peers. METHODS: In this cross-sectional study peripheral blood mononuclear cells (PBMC) were isolated from preterm and term children at age three years. Innate immune response was evaluated by the analysis of TLR receptors expression on CD11c(+)HLADR(high) cells and inflammatory cytokine production after PBMC stimulation with Toll like receptors (TLR) ligands...
February 21, 2017: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/28236535/impaired-expression-and-function-of-tlr8-in-chronic-hbv-infection-and-its-association-with-treatment-responses-during-peg-ifn-%C3%AE-2a-antiviral-therapy
#10
Guangying Deng, Jun Ge, Chao Liu, Jinke Pang, Zuxiong Huang, Jie Peng, Jian Sun, Jinlin Hou, Xiaoyong Zhang
BACKGROUND AND AIM: Toll-like receptor 8 (TLR8) plays an important role in controlling chronic viral infections. However, the role of TLR8 in chronic hepatitis B virus (HBV) infection is poorly understood. In this study, we aimed to investigate the expression and function of TLR8 in peripheral blood mononuclear cells (PBMCs) of chronic hepatitis B (CHB) patients and its alteration during peg-IFN-α-2a therapy. METHODS: We evaluated TLR8 expression and antiviral function in vitro by real-time RT-PCR and flow cytometry analysis using fresh PBMCs obtained from CHB patients compared to healthy controls...
February 21, 2017: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/28236375/discordant-frequencies-of-tissue-resident-and-circulating-cd180-negative-b-cells-in-chronic-rhinosinusitis
#11
Dijana Miljkovic, Judy Ou, Chandra Kirana, Kathryn E Hulse, Ehud Hauben, Alkis Psaltis, Peter-John Wormald, Sarah Vreugde
BACKGROUND: The unconventional toll-like receptor (TLR) CD180 is implicated in chronic inflammatory diseases; however, its role in chronic rhinosinusitis (CRS) has yet to be investigated. Here we study the expression of CD180, its homologue TLR4 and myeloid differentiation factor 1 (MD1) on mucosal and systemic immune cell populations in relation to serum immunoglobulin G (IgG) levels. METHODS: A total of 70 patients were recruited to the study. Mucosal and peripheral blood samples were prospectively collected from CRS patients and non-CRS controls without evidence of sinus disease...
February 25, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28235900/mesenchymal-stromal-cell-derived-extracellular-vesicles-promote-myeloid-biased-multipotent-hematopoietic-progenitor-expansion-via-toll-like-receptor-engagement
#12
Natalya A Goloviznina, Santhosh Chakkaramakkil Verghese, Young Me Yoon, Oleh Taratula, Daniel L Marks, Peter Kurre
No abstract text is available yet for this article.
February 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28235783/proteome-and-secretome-analysis-reveals-differential-post-transcriptional-regulation-of-toll-like-receptor-responses
#13
Marijke Koppenol-Raab, Virginie H Sjoelund, Nathan P Manes, Rachel A Gottschalk, Bhaskar Dutta, Zachary L Benet, Iain D C Fraser, Aleksandra Nita-Lazar
The innate immune system is the organism's first line of defense against pathogens. Pattern recognition receptors (PRRs) are responsible for sensing the presence of pathogen-associated molecules. The prototypic PRRs, the membrane-bound receptors of the Toll-like receptor (TLR) family, recognize pathogen-associated molecular patterns (PAMPs) and initiate an innate immune response through signaling pathways that depend on the adaptor molecules MyD88 and TRIF. Deciphering the differences in the complex signaling events that lead to pathogen recognition and initiation of the correct response remains challenging...
February 24, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28235660/targeting-the-tlr4-signaling-pathway-by-polyphenol-a-novel-therapeutic-strategy-for-neuroinflammation
#14
REVIEW
Mahban Rahimifard, Faheem Maqbool, Shermineh Moeini-Nodeh, Kamal Niaz, Mohammad Abdollahi, Nady Braidy, Seyed Mohammad Nabavi, Seyed Fazel Nabavi
A wide array of cell signaling mediators and their interactions play vital roles in neuroinflammation associated with ischemia, brain trauma, developmental disorders and age-related neurodegeneration. Along with neurons, microglia and astrocytes are also affected by the inflammatory cascade by releasing pro-inflammatory cytokines, chemokines and reactive oxygen species. The release of pro-inflammatory mediators in response to neural dysfunction may be helpful, neutral or even deleterious to normal cellular survival...
February 21, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28231510/lipopolyplex-potentiates-anti-tumor-immunity-of-mrna-based-vaccination
#15
Stefano Persano, Maria L Guevara, Zhaoqi Li, Junhua Mai, Mauro Ferrari, Pier Paolo Pompa, Haifa Shen
mRNA-based vaccines have the benefit of triggering robust anti-cancer immunity without the potential danger of genome integration from DNA vaccines or the limitation of antigen selection from peptide vaccines. Yet, a conventional mRNA vaccine comprising of condensed mRNA molecules in a positively charged protein core structure is not effectively internalized by the antigen-presenting cells. It cannot offer sufficient protection for mRNA molecules from degradation by plasma and tissue enzymes either. Here, we have developed a lipopolyplex mRNA vaccine that consists of a poly-(β-amino ester) polymer mRNA core encapsulated into a 1,2-dioleoyl-sn-glycero-3-ethylphosphocholine/1,2-dioleoyl-sn-glycero-3-phosphatidyl-ethanolamine/1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polyethylene glycol)-2000 (EDOPC/DOPE/DSPE-PEG) lipid shell...
February 20, 2017: Biomaterials
https://www.readbyqxmd.com/read/28228598/beware-are-bacteria-raising-your-oxidative-stress
#16
Purna Kashyap
Peptostreptococcus anaerobius, enriched in patients with colon cancer, induces cellular proliferation and dysplasia by toll-like receptor (TLR) 2- and TLR4-dependent increase in oxidative stress and cholesterol biosynthesis.
February 22, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28228587/prophylactic-herpes-simplex-virus-2-hsv-2-vaccines-adjuvanted-with-stable-emulsion-and-toll-like-receptor-9-agonist-induce-a-robust-hsv-2-specific-cell-mediated-immune-response-protect-against-symptomatic-disease-and-reduce-the-latent-viral-reservoir
#17
Michael T Hensel, Jason D Marshall, Michael R Dorwart, Darren S Heeke, Eileen Rao, Padmaja Tummala, Li Yu, Gary H Cohen, Roselyn J Eisenberg, Derek D Sloan
Several prophylactic vaccines targeting HSV-2 have failed in the clinic to demonstrate a sustained depression in viral shedding or protection from recurrences. Although these vaccines have generated high titers of neutralizing antibodies, their induction of robust CD8 T cells has largely been unreported, even though evidence for the importance of HSV-2 antigen-specific CD8 T cells is mounting in animal models and in translational studies involving subjects with active HSV-2-specific immune responses. We developed a subunit vaccine composed of the neutralizing antibody (nAb) targets gD and gB, the novel T cell antigen and tegument protein UL40, and we compared this to a whole-inactivated virus vaccine (FI-HSV-2)...
February 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28228554/association-of-lyn-kinase-with-membrane-rafts-determines-its-negative-influence-on-lps-induced-signaling
#18
Kinga Borzęcka-Solarz, Justyna Dembińska, Aneta Hromada-Judycka, Gabriela Traczyk, Anna Ciesielska, Ewelina Ziemlińska, Anna Świątkowska, Katarzyna Kwiatkowska
Lipopolysaccharide (LPS) is the component of Gram-negative bacteria which activates Toll-like receptor 4 (TLR4) to trigger pro-inflammatory responses. We examined the involvement of Lyn tyrosine kinase in TLR4 signaling of macrophages, distinguishing its catalytic activity and intermolecular interactions. For this, a series of Lyn-GFP constructs bearing point mutations in particular domains of Lyn were overexpressed in RAW264 macrophage-like cells or murine peritoneal macrophages, and their influence on LPS-induced responses was analyzed...
February 22, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28228357/activation-of-mtor-i%C3%AE%C2%BAb-%C3%AE-nf-%C3%AE%C2%BAb-pathway-contributes-to-lps-induced-hypotension-and-inflammation-in-rats
#19
Meryem Temiz-Resitoglu, Sefika Pinar Kucukkavruk, Demet Sinem Guden, Pelin Cecen, Ayse Nihal Sari, Bahar Tunctan, Aysegul Gorur, Lulufer Tamer-Gumus, Cuneyt Kemal Buharalioglu, Kafait U Malik, Seyhan Sahan-Firat
Mammalian target of rapamycin (mTOR), a serine/threonine kinase plays an important role in various pathophysiological processes including cancer, metabolic diseases, and inflammation. Although mTOR participates in Toll-like receptor 4 signalling in different cell types, the role of this enzyme in sepsis pathogenesis and its effects on hypotension and inflammation in endotoxemic rats remains unclear. In this study we investigated the effects of mTOR inhibition on lipopolysaccharide (LPS)-induced changes on expressions and/or activities of ribosomal protein S6 (rpS6), an mTOR substrate, nuclear factor-κB (NF-κB) p65, inhibitor κB (IκB)-α, inducible nitric oxide synthase (iNOS), cyclooxygenase (COX)-2 with production of nitric oxide, peroxynitrite, prostacyclin, and tumor necrosis factor (TNF)-α and activity of myeloperoxidase (MPO), which results in hypotension and inflammation...
February 20, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28228119/genetic-variation-of-the-toll-like-receptors-in-a-swedish-allergic-rhinitis-case-population
#20
V Henmyr, D Carlberg, E Manderstedt, C Lind-Halldén, T Säll, L O Cardell, C Halldén
BACKGROUND: Variation in the 10 toll-like receptor (TLR) genes has been significantly associated with allergic rhinitis (AR) in several candidate gene studies and three large genome-wide association studies. These have all investigated common variants, but no investigations for rare variants (MAF ≤ 1%) have been made in AR. The present study aims to describe the genetic variation of the promoter and coding sequences of the 10 TLR genes in 288 AR patients. METHODS: Sanger sequencing and Ion Torrent next-generation sequencing was used to identify polymorphisms in a Swedish AR population and these were subsequently compared and evaluated using 1000Genomes and Exome Aggregation Consortium (ExAC) data...
February 23, 2017: BMC Medical Genetics
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