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Toll-like Receptors

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https://www.readbyqxmd.com/read/28647749/expression-of-high-mobility-group-box-1-protein-hmgb1-and-toll-like-receptor-9-tlr9-in-retinas-of-diabetic-rats
#1
Shuang Jiang, Xiaolong Chen
BACKGROUND Diabetic retinopathy (DR) and diabetic optic neuropathy are important complications of diabetes mellitus (DM) which can lead to blindness in diabetic patients. Recent studies showed that chronic low-grade inflammation is thought to be one of the important pathophysiological mechanisms in the occurrence and development of DR and diabetes optic neuropathy. This study explored the expressions of inflammatory factors HMGB-1 and TLR9. MATERIAL AND METHODS SD rats were randomly divided into a diabetic mellitus group and a control group...
June 25, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28646884/the-increased-concentration-of-macrophage-migration-inhibitory-factor-in-serum-and-cerebrospinal-fluid-of-patients-with-tick-borne-encephalitis
#2
Sambor Grygorczuk, Miłosz Parczewski, Renata Świerzbińska, Piotr Czupryna, Anna Moniuszko, Justyna Dunaj, Maciej Kondrusik, Sławomir Pancewicz
BACKGROUND: Host factors determining the clinical presentation of tick-borne encephalitis (TBE) are not fully elucidated. The peripheral inflammatory response to TBE virus is hypothesized to facilitate its entry into central nervous system by disrupting the blood-brain barrier with the involvement of a signaling route including Toll-like receptor 3 (TLR3) and pro-inflammatory cytokines macrophage migration inhibitory factor (MIF), tumor necrosis factor-α (TNFα), and interleukin-1 beta (IL-1β)...
June 24, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28646881/heme-molecule-functions-as-an-endogenous-agonist-of-astrocyte-tlr2-to-contribute-to-secondary-brain-damage-after-intracerebral-hemorrhage
#3
Hyunjung Min, Boomin Choi, Yong Ho Jang, Ik-Hyun Cho, Sung Joong Lee
Toll-like receptor 2 (TLR2) was recently shown to contribute to secondary brain damage after intracerebral hemorrhage (ICH), although the molecular mechanisms of this contribution are elusive. In this study, we tested the hypothesis that hemin functions as a TLR2 endogenous agonist, causing proinflammatory astrocyte activation and secondary brain damage after ICH. Hemin administration to the mouse brain striatum induced ICH injury and neurological deficits, however, the brain injury volume and neurological deficits due to hemin injection were significantly reduced in TLR2 knock-out (KO) mice...
June 24, 2017: Molecular Brain
https://www.readbyqxmd.com/read/28646802/dampness-can-promote-the-influenza-a-virus-and-worsen-its-prognosis-by-upregulating-the-tlr7-signaling-pathway
#4
Deng Li, Xu Huachong, Pang Peng, Zheng Ke, Nie Jiao, Wu Xianlin, Yu Bin, Chen Jia, Chen Xiaoyin
Context • Outbreaks of the influenza A virus (IAV) are increasingly recognized as a global public health issue, affecting a large proportion of the world's population. A number of studies have provided epidemiologic evidence that dampness and mold are consistently associated with multiple allergic and respiratory effects, but they focused on dampness-related pathogenic microorganisms leading to allergy rather than the dampness itself. Objective • The current study intended to examine the effects of a damp environment on the promotion of the IAV and determine the adverse effects on its prognosis through upregulation of the toll-like receptor 7 (TLR7)-signaling pathway in the lung...
June 23, 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28646209/upregulation-of-circulating-microrna-134-in-adult-onset-still-s-disease-and-its-use-as-potential-biomarker
#5
Tsai-Ling Liao, Yi-Ming Chen, Chia-Wei Hsieh, Hsin-Hua Chen, Hsiu-Chin Lee, Wei-Ting Hung, Kuo-Tung Tang, Der-Yuan Chen
Adult-onset Still's disease (AOSD) is a multi-systemic inflammatory disorder of unknown etiology. To date, no single diagnostic test is available for AOSD. Herein, we investigated the pathogenic role of microRNAs in AOSD. MicroRNA profiles in plasma from AOSD patients and healthy controls were analyzed by microarray analysis, followed by quantitative reverse transcription PCR validation. The biological functions of microRNAs were evaluated using in vitro cell-based assay. Among the differentially expressed microRNAs, microRNA-134 (miR-134) expression was positively correlated with AOSD activity scores and significantly decreased after effective treatment...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646138/uniting-the-neuro-developmental-and-immunological-hypotheses-neuregulin-1-receptor-erbb-and-toll-like-receptor-activation-in-first-episode-schizophrenia
#6
Szabolcs Kéri, Csilla Szabó, Oguz Kelemen
Current pathophysiological models of schizophrenia focus on neurodevelopmental and immunological mechanisms. We investigated a molecular pathway traditionally linked to the neurodevelopmental hypothesis (neuregulin 1 - ErbB), and pathogen-associated pattern recognition receptors associated with the immune hypothesis (Toll-like receptors, TLRs). We recruited 42 first-episode, drug-naïve patients with schizophrenia and 42 matched healthy control subjects. In monocytes TLR4/TLR5 and ErbB expressions were measured with flow-cytometry...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28645718/optimizing-adjuvants-for-intradermal-delivery-of-menc-glycoconjugate-vaccine
#7
Agnese Donadei, Cristiana Balocchi, Maria R Romano, Luigi Panza, Roberto Adamo, Francesco Berti, Derek T O'Hagan, Simona Gallorini, Barbara C Baudner
Intradermal vaccine delivery is a promising alternative to the conventional intramuscular route. The skin layer is immunologically supported by a densely network of antigen presenting cells, while the skeletal muscle is loaded with a relatively sparse population of APCs. Nevertheless, the vaccine to be suitable for intradermal delivery needs a new formulation to facilitate either smaller injection volumes or the introduction into new delivery devises as micro-needles. This study presents a proof of concept for intradermal delivery of the MenC-CRM197 glycoconjugate vaccine using a mouse model...
June 20, 2017: Vaccine
https://www.readbyqxmd.com/read/28645307/aberrant-intestinal-microbiota-due-to-il-1-receptor-antagonist-deficiency-promotes-il-17-and-tlr4-dependent-arthritis
#8
Rebecca Rogier, Thomas H A Ederveen, Jos Boekhorst, Harm Wopereis, Jose U Scher, Julia Manasson, Sanne J C M Frambach, Jan Knol, Johan Garssen, Peter M van der Kraan, Marije I Koenders, Wim B van den Berg, Sacha A F T van Hijum, Shahla Abdollahi-Roodsaz
BACKGROUND: Perturbation of commensal intestinal microbiota has been associated with several autoimmune diseases. Mice deficient in interleukin-1 receptor antagonist (Il1rn (-/-) mice) spontaneously develop autoimmune arthritis and are susceptible to other autoimmune diseases such as psoriasis, diabetes, and encephalomyelitis; however, the mechanisms of increased susceptibility to these autoimmune phenotypes are poorly understood. We investigated the role of interleukin-1 receptor antagonist (IL-1Ra) in regulation of commensal intestinal microbiota, and assessed the involvement of microbiota subsets and innate and adaptive mucosal immune responses that underlie the development of spontaneous arthritis in Il1rn (-/-) mice...
June 23, 2017: Microbiome
https://www.readbyqxmd.com/read/28645296/myd88-dependent-pro-interleukin-1%C3%AE-induction-in-dendritic-cells-exposed-to-food-grade-synthetic-amorphous-silica
#9
Hans Christian Winkler, Julian Kornprobst, Peter Wick, Lea Maria von Moos, Ioannis Trantakis, Elisabeth Maria Schraner, Barbara Bathke, Hubertus Hochrein, Mark Suter, Hanspeter Naegeli
BACKGROUND: Dendritic cells (DCs) are specialized first-line sensors of foreign materials invading the organism. These sentinel cells rely on pattern recognition receptors such as Nod-like or Toll-like receptors (TLRs) to launch immune reactions against pathogens, but also to mediate tolerance to self-antigens and, in the intestinal milieu, to nutrients and commensals. Since inappropriate DC activation contributes to inflammatory diseases and immunopathologies, a key question in the evaluation of orally ingested nanomaterials is whether their contact with DCs in the intestinal mucosa disrupts this delicate homeostatic balance between pathogen defense and tolerance...
June 23, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28644965/3-4-dihydroxybenzalacetone-attenuates-lipopolysaccharide-induced-inflammation-in-acute-lung-injury-via-down-regulation-of-mmp-2-and-mmp-9-activities-through-suppressing-ros-mediated-mapk-and-pi3k-akt-signaling-pathways
#10
Wei Chao, Jeng-Shyan Deng, Shyh-Shyun Huang, Pei-Ying Li, Yu-Chia Liang, Guan-Jhong Huang
3, 4-Dihydroxybenzalacetone (DBL) is a constituent of Phellinus linteus. This study demonstrated the protective effect of DBL on lipopolysaccharide (LPS)-induced acute lung injuries in mice. Pretreatment with DBL significantly improved LPS-induced histological alterations in lung tissues. In addition, DBL markedly reduced the total cell number, the leukocytes, the protein concentrations, and decreased the release of nitrite, tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6 and the activities of matrix metalloproteinase (MMP)-2 and -9 in the bronchoalveolar lavage fluid...
June 20, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28644608/targeting-cpg-adjuvant-to-lymph-node-via-dextran-conjugate-enhances-anti-tumor-immunotherapy
#11
Weidong Zhang, Myunggi An, Jingchao Xi, Haipeng Liu
Nucleic acids based adjuvants recognized by Toll-like receptors (TLR) are potent immune system stimulants that can augment the anti-tumor immune responses in an antigen-specific manner. However, their clinical uses as vaccine adjuvants are limited primarily due to lack of accumulation in the lymph nodes, the anatomic sites where the immune responses are initiated. Here, we showed that chemical conjugation of type B CpG DNA, a TLR9 agonist to dextran polymer dramatically enhanced CpG's lymph node accumulation in mice...
June 23, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28643937/proinflammatory-effects-and-mechanisms-of-calprotectin-on-human-gingival-fibroblasts
#12
H Gao, J Hou, H Meng, X Zhang, Y Zheng, L Peng
BACKGROUND AND OBJECTIVE: Calprotectin (S100A8/A9) is a heterodimer of S100A8 and S100A9 and is associated with multiple inflammatory diseases, including Crohn's disease, rheumatoid arthritis and periodontitis. Levels of calprotectin are elevated in the gingival crevicular fluid of patients with periodontitis; however, the effects of calprotectin on human gingival fibroblasts (HGFs) remain unknown. This study investigated the proinflammatory activity of calprotectin on HGFs and the functional receptors and signaling pathways engaged by calprotectin...
June 23, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28642826/elucidation-of-the-role-of-lectin-like-oxldl-receptor-1-in-the-metabolic-responses-of-macrophages-to-human-oxldl
#13
Danielle W Kimmel, William P Dole, David E Cliffel
Atherogenesis is the narrowing of arteries due to plaque build-up that results in cardiovascular disease that can lead to death. The macrophage lectin-like oxidized LDL receptor-1 (LOX-1), also called the oxidized low-density lipoprotein receptor 1 (OLR1), is currently thought to aid in atherosclerotic disease progression; therefore metabolic studies have potential to both provide mechanistic validation for the role of LOX-1 in disease progression and provide valuable information regarding biomarker strategies and clinical imaging...
2017: Journal of Lipids
https://www.readbyqxmd.com/read/28642706/toll-like-receptor-4-modulates-small-intestine-neuromuscular-function-through-nitrergic-and-purinergic-pathways
#14
Valentina Caputi, Ilaria Marsilio, Silvia Cerantola, Mona Roozfarakh, Isabella Lante, Francesca Galuppini, Massimo Rugge, Eleonora Napoli, Cecilia Giulivi, Genny Orso, Maria Cecilia Giron
Objective: Toll-like receptors (TLRs) play a pivotal role in the homeostatic microflora-host crosstalk. TLR4-mediated modulation of both motility and enteric neuronal survival has been reported mainly for colon with limited information on the role of TLR4 in tuning structural and functional integrity of enteric nervous system (ENS) and in controlling small bowel motility. Methods: Male TLR4 knockout (TLR4(-/-), 9 ± 1 weeks old) and sex- and age-matched wild-type (WT) C57BL/6J mice were used for the experiments...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28642294/mhc-class-ii-invariant-chain-peptide-or-gamma-delta-t-cell-depletion-ameliorates-experimental-preeclampsia
#15
Piyali Chatterjee, Valorie L Chiasson, Geetha Seerangan, Eugene De Guzman, Moheb Milad, Kelsey R Bounds, Olga Gasheva, Richard P Tobin, Mohamad Hatahet, Shelley Kopriva, Kathleen A Jones, M Karen Newell-Rogers, Brett Mitchell
Excessive innate immune system activation and inflammation during pregnancy can lead to organ injury and dysfunction and preeclampsia; however, the molecular mechanisms involved are unknown.  We tested the hypothesis that Toll-like receptor activation induces MHC class II invariant chain peptide (CLIP) expression on immune cells, makes them pro-inflammatory, and are necessary to cause preeclampsia-like features in mice.  Treatment with VG1177, a competitive antagonist peptide for CLIP in the groove of MHC class II, was able to both prevent and treat preeclampsia-like features in mice...
June 22, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28641569/a-review-on-defects-of-dendritic-cells-in-common-variable-immunodeficiency
#16
Laleh Sharifi, Naeimeh Tavakolinia, Fatemeh Kiaee, Nima Rezaie, Monireh Mohsenzadegan, Mansoureh Shariat, Reza Yazdani, Abbas Mirshafiey, Asghar Aghamohammadi, Gholamreza Azizi
BACKGROUND AND OBJECTIVES: Common variable immunodeficiency (CVID) is the most important primary that is associated with clinical complications including recurrent infections, malignancy and autoimmune diseases. The genetic cause of CVID is mostly unknown and only a few genetic causes are identified. The various options are proposed for determining the etiology of CVID patients, such as T- and B-cell defects, Toll-like receptors (TLRs) impairments, altered cytokine production as well as blemished dendritic cells (DCs)...
June 13, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/28641285/role-of-glycyrrhizin-in-the-reduction-of-inflammation-in-diabetic-kidney-disease
#17
Vikram Thakur, Syeda Nargis, Mayra Gonzalez, Swetak Pradhan, Daniel Terreros, Munmun Chattopadhyay
BACKGROUND: Diabetic kidney disease (DKD) is one of the most debilitating complications of type 2 diabetes. Recent evidence suggests chronic inflammation to be one of the causal factors of DKD. The mechanisms entailed are not completely elucidated except that a variety of cytokines play a major role in this process. High mobility group box 1 (HMGB1) is a pro-inflammatory toll-like receptor-4 (TLR4)-binding cytokine that is involved in inflammation-associated gene expression. This investigation was designed to assess the involvement of HMGB1, TLR-4, and nuclear factor (NF)-κB in the development of DKD and to evaluate that whether blocking HMGB1 by its natural inhibitor Glycyrrhizin (GLC) can reduce the progression of the disease...
June 23, 2017: Nephron
https://www.readbyqxmd.com/read/28641051/beneficial-role-of-citrus-fruit-polyphenols-against-hepatic-dysfunctions-a-review
#18
Md Mohabbulla Mohib, Kazi Afnan, Tasfiq Zaman Paran, Salma Khan, Juthika Sarker, Nahid Hasan, Istiaque Hasan, Md Abu Taher Sagor
Alcoholic liver diseases and virus-induced hepatic dysfunctions are prevalent in western countries. Evidence also suggests that hyperglycemia and insulin resistance are key players in the development of hepatic diseases and their complications. Since the comorbid diseases like obesity, diabetes and vascular dysfunctions primarily affect liver, the modern therapies against other hepatic dysfunctions are becoming a major challenge to treat. In addition to these, polypharmacy and adverse drug reactions (ADRs) are further aggravating the phenomenon...
June 22, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28640587/silica-nanoparticle-as-a-lymph-node-targeting-platform-for-vaccine-delivery
#19
Myunggi An, Meng Li, Jingchao Xi, Haipeng Liu
Nanoparticles have emerged as the platform of choice to improve the efficacy and safety of subunit vaccines. A major challenge underlying the use of nanomaterials in vaccines lies in the particle designs that can efficiently target and activate the antigen-presenting cells, especially dendritic cells. Here we show a toll-like receptor 9 (TLR-9) agonist and antigen co-loaded, silica nanoparticles (SiNPs) are able to accumulate in antigen presenting cells in the draining lymph nodes after injection. Vaccine loaded SiNPs led to dramatically enhanced induction of antigen-specific B and T cell responses as compared to soluble vaccines, which in turn drove a protective antitumoral immunity in a murine tumor model...
June 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28639322/tnf-%C3%AE-induced-nod2-and-rip2-contribute-to-the-up-regulation-of-cytokines-induced-by-mdp-in-monocytic-thp-1-cells
#20
Xiaobin Chen, Zhilin Xiao, Xiumei Xie, Xueting Liu, Manli Jiang, Chuang Yuan, Li Yang, Jinyue Hu
Nucleotide-binding oligomerization domain containing 2 (NOD2)-induced signal transduction and cytokine production is regulated by a number of factors. However, the feedback effect of the pro-inflammatory TNF-α on NOD2-induced inflammation is not fully understood. In this study, we found unexpectedly that TNF-α up-regulated NOD2 ligand MDP-induced production of the CXC chemokines, including CXCL1, 2 and 8, and the pro-inflammatory cytokines, including IL-1β, IL-6 and TNF-α, in a dose-dependent manner at both mRNA and protein levels in monocytic THP-1 cells...
June 21, 2017: Journal of Cellular Biochemistry
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