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toll like receptor 3

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https://www.readbyqxmd.com/read/28822965/diabetes-increases-the-susceptibility-to-acute-kidney-injury-after-myocardial-infarction-through-augmented-activation-of-renal-toll-like-receptors-in-rats
#1
Kouhei Ohno, Atsushi Kuno, Hiromichi Murase, Shingo Muratsubaki, Takayuki Miki, Masaya Tanno, Toshiyuki Yano, Satoko Ishikawa, Tomohisa Yamashita, Tetsuji Miura
Acute kidney injury (AKI) after acute myocardial infarction (MI) worsens the prognosis of MI patients. Although type 2 diabetes mellitus (DM) is a major risk factor of AKI after MI, the underlying mechanism remains unclear. Here, we examined roles of renal toll-like receptors (TLRs) in the impact of DM on AKI after MI. MI was induced by coronary artery ligation in OLETF, a rat DM model, and LETO, non-diabetic controls. Sham-operated rats served as no-MI controls. Renal mRNA levels of TLR2 and MyD88 were significantly higher in sham-operated OLETF than in sham-operated LETO, though levels of TLR1, TLR3, and TRL4 were similar...
August 19, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28812045/soluble-st2-predicts-outcome-and-hemorrhagic-transformation-after-acute-stroke
#2
Zoe Wolcott, Ayush Batra, Matthew B Bevers, Cristina Sastre, Jane Khoury, Matthew Sperling, Brett C Meyer, Kyle B Walsh, Opeolu Adeoye, Joseph P Broderick, W Taylor Kimberly
OBJECTIVE: ST2 is a member of the toll-like receptor superfamily that can alter inflammatory signaling of helper T-cells. We investigated whether soluble ST2 (sST2) could independently predict outcome and hemorrhagic transformation (HT) in the setting of stroke. METHODS: We measured sST2 in patients enrolled in the Specialized Program of Translational Research in Acute Stroke (SPOTRIAS) network biomarker study. 646 patients had plasma samples collected at the time of hospital admission and 210 patients had a second sample collected 48 h after stroke onset...
August 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28808786/inhibition-of-tlr4-alleviates-the-inflammation-and-apoptosis-of-retinal-ganglion-cells-in-high-glucose
#3
Lili Hu, Hongxia Yang, Ming Ai, Shuanghong Jiang
PURPOSE: To investigate the expression profiles of Toll-like receptor 4 (TLR4), the effect of TLR4 on inflammation, and apoptosis of retinal ganglion cells (RGCs) cultured in high glucose and the underlying mechanism. METHODS: A high-glucose model was established in RGCs isolated from Sprague-Dawley (SD) rats (2-3 days old) and identified with Brn3a. Primary cultured RGCs were divided into control (0 mM), HG1 (10 mM glucose), HG2 (20 mM glucose), HG3 (30 mM glucose), HG (20 mM glucose) + TAK-242 (1...
August 14, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28807557/the-role-of-toll-like-receptor-3-in-chronic-contact-hypersensitivity-induced-by-repeated-elicitation
#4
Risa Yasuike, Risa Tamagawa-Mineoka, Mayumi Ueta, Naomi Nakamura, Shigeru Kinoshita, Norito Katoh
BACKGROUND: Accumulating evidence suggests that Toll-like receptor (TLR)-3 signaling is involved in non-infectious immune and inflammatory reactions as well as in viral infections. The skin of patients with atopic dermatitis (AD) is often infected with virus and bacteria, leading to the aggravation of atopic symptoms. These findings suggest TLR3 signaling may be involved in the pathogenesis of AD, but the exact role of TLR3 in AD remains to be defined. OBJECTIVE: The purpose of this study was to investigate the role of TLR3 in chronic contact hypersensitivity reactions induced by repeated elicitation, resembling the features of AD...
August 4, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28807280/immunization-with-inactivated-antigens-of-neospora-caninum-induces-toll-like-receptors-3-7-8-and-9-in-maternal-fetal-interface-of-infected-pregnant-heifers
#5
M S Marin, Y P Hecker, S Quintana, S E Pérez, M R Leunda, G J Cantón, E R Cobo, D P Moore, A C Odeón
Neospora caninum is an obligate parasite and a major cause of abortion in cattle. Pregnancy failures appear to be associated with weak innate defences on the maternal-fetal interface during infection with N. caninum. Herein, we studied the gene expression of Toll-like receptors (TLRs) in pregnant heifers immunized with different vaccine formulations against N. caninum before mating and then challenged the heifers with live N. caninum on day 70 of gestation. TLR7 and TLR8 expression was upregulated in the placental caruncle of infected-pregnant heifers previously exposed to live N...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28802127/investigations-on-the-molecular-mode-of-action-of-the-novel-immunostimulator-zelnate-activation-of-the-cgas-sting-pathway-in-mammalian-cells
#6
Thomas Ilg
Bovine respiratory disease (BRD) is usually prevented or treated with vaccines and/or antibiotics. The use of antibiotics is, however, of concern due to the potential promotion of microbial resistance and the occurrence of residues. Recently an alternative aid in the treatment of BRD, the cationic lipid/bacterial plasmid DNA liposome-based immunomodulator ZelNate, has entered the veterinary market. In the present study, we provide data on the molecular mode of action of ZelNate. Despite the presence of numerous non-methylated CpG motifs in its plasmid DNA, ZelNate proved to be inactive on human and mouse toll-like receptor 9 (TLR9) in cell culture, in both recombinant and natural cellular receptor settings...
August 9, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28801798/downregulation-of-paralemmin-3-ameliorates-lipopolysaccharide-induced-acute-lung-injury-in-rats-by-regulating-inflammatory-response-and-inhibiting-formation-of-tlr4-myd88-and-tlr4-trif-complexes
#7
Xuxin Chen, Lu Tang, Jian Feng, Yi Wang, Zhihai Han, Jiguang Meng
Previous studies have demonstrated paralemmin-3 (PALM3) participates in Toll-like receptor (TLR) signaling. This study investigated the effect of PALM3 knockdown on lipopolysaccharide (LPS)-induced acute lung injury (ALI) and its underlying mechanisms. We constructed a recombinant adenoviral vector containing short hairpin RNA for PALM3 to knockdown PALM3 expression. A transgene-free adenoviral vector was used as a negative control. The ALI rat model was established by LPS peritoneal injection at 48-h post-transfection...
August 12, 2017: Inflammation
https://www.readbyqxmd.com/read/28801370/impact-of-tlr-2-tlr-4-activation-on-the-expression-of-abca1-and-abcg1-in-raw-cells
#8
Kana Suzuki, Yasushi Kawakami, Kazuyoshi Yamauchi
Toll-like receptors (TLR) activation is thought to modulate the macrophage cholesterol efflux and contribute to the atherosclerosis progression; however, the precise pathophysiological mechanism remains unclear. We investigated the effects of TLR2- and TLR4-activation on the expression of the ATP-binding cassette (ABC) transporters ABCA1 and ABCG1 in a mouse macrophage cell line, Raw 264.7. Both TLR2- and TLR4-activation upregulated the expression of ABCA1 mRNA but downregulated that of ABCG1 mRNA. These alterations may be mainly regulated by the following 3 cascades: (1) the TLR/myeloid differentiation primary-response protein 88/Liver X receptor pathway, which upregulated the ABCA1 mRNA; (2) NF-κB pathway, which downregulated the ABCG1 mRNA, and (3) the p38 pathway, which upregulated and stabilized ABCA1 mRNA...
August 2017: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/28800975/exopolysaccharides-from-lactobacillus-delbrueckii-oll1073r-1-modulate-innate-antiviral-immune-response-in-porcine-intestinal-epithelial-cells
#9
Paulraj Kanmani, Leonardo Albarracin, Hisakazu Kobayashi, Hikaru Iida, Ryoya Komatsu, A K M Humayun Kober, Wakako Ikeda-Ohtsubo, Yoshihito Suda, Hisashi Aso, Seiya Makino, Hiroshi Kano, Tadao Saito, Julio Villena, Haruki Kitazawa
Previous studies demonstrated that the extracellular polysaccharides (EPSs) produced by Lactobacillus delbrueckii OLL1073R-1 (LDR-1) improve antiviral immunity, especially in the systemic and respiratory compartments. However, it was not studied before whether those EPSs are able to beneficially modulate intestinal antiviral immunity. In addition, LDR-1-host interaction has been evaluated mainly with immune cells while its interaction with intestinal epithelial cells (IECs) was not addressed before. In this work, we investigated the capacity of EPSs from LDR-1 to modulate the response of porcine IECs (PIE cells) to the stimulation with the Toll-like receptor (TLR)-3 agonist poly(I:C) and the role of TLR2, TLR4, and TLR negative regulators in the immunoregulatory effect...
August 8, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28800925/resveratrol-increases-phagocytosis-and-lipopolysaccharide-induced-interleukin-1%C3%AE-production-but-decreases-surface-expression-of-toll-like-receptor-2-in-thp-1-monocytes
#10
Susan J Zunino, Daniel H Hwang, Shurong Huang, David H Storms
THP-1 monocytes were used to evaluate the effects of physiological levels of resveratrol aglycone, resveratrol-3-O-glucuronide, resveratrol-4'-O-glucuronide, and resveratrol-3-O-sulfate on phagocytosis, IL-1β, IL-1α, and IL-18 production, viability, and TLR2 and TLR4 expression. THP-1 cells were treated with 1, 5, 10, and 15μM resveratrol or metabolites. Resveratrol-3-O-glucuronide, resveratrol-4'-O-glucuronide, and resveratrol-3-O-sulfate had no effect on the functional parameters tested. Resveratrol aglycone increased phagocytosis at concentrations of 5, 10, and 15μM and LPS-induced IL-1β production at concentrations of 10 and 15μM...
August 8, 2017: Cytokine
https://www.readbyqxmd.com/read/28798666/nlrp6-inflammasome-ameliorates-brain-injury-after-intracerebral-hemorrhage
#11
Peng-Fei Wang, Zhen-Guang Li, Yong Zhang, Xiao-Hua Ju, Xin-Wu Liu, Ai-Ming Zhou, Jing Chen
NLRP6 inflammasome, one of the important intracellular innate immune sensors, has been shown to regulate immune responses. However, its roles in the intracerebral hemorrhage (ICH) are completely not clear. In the present study, we investigated the expression profile and biological roles of NLRP6 inflammasome in perihematomal brain tissues of mice subjected to ICH. In this study, we investigated the expression profile of NLRP6 inflammasome in the perihematomal brain tissues and explored the biological role of NLRP6 inflammasome upon acute brain injury in mice subjected to ICH...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28796783/myd88-contribution-to-ocular-surface-homeostasis
#12
Rose Y Reins, Justin Courson, Carolina Lema, Rachel L Redfern
The cornea must maintain homeostasis, enabling rapid response to injury and microbial insult, to protect the eye from insult and infection. Toll-like receptors (TLRs) are critical to this innate immune response through the recognition and response to pathogens. Myeloid differentiation primary response (MyD88) is a key signaling molecule necessary for Toll-like receptor (TLR) and interleukin-1 receptor (IL-1R)-mediated immune defense and has been shown to be necessary for corneal defense during infection. Here, we examined the intrinsic role of TLR signaling in ocular surface tissues by determining baseline levels of inflammatory mediators, the response to mechanical stimuli, and corneal infection in MyD88-deficient mice (MyD88-/-)...
2017: PloS One
https://www.readbyqxmd.com/read/28794402/dec1-negatively-regulates-the-expression-of-cxcl10-and-ccl5-induced-by-poly-ic-in-normal-human-mesangial-cells
#13
Qiang Liu, Tadaatsu Imaizumi, Keishu Murakami, Hiroshi Tanaka, Yunyan Wu, Tadashi Yoshizawa, Satoko Morohashi, Hiroko Seino, Hiroshi Kijima
The functions of differentiated embryonic chondrocyte gene (DEC) 1, a basic helix-loop-helix (bHLH) transcription factor, have been reported to be associated with the regulation of mammalian circadian rhythms, differentiation of chondrocytes and skeletal muscles, apoptosis, hypoxia-induced reactions and epithelial mesenchymal transition. Our previous report showed that another bHLH transcription factor DEC2 constitutes a negative feedback loop in Toll-like receptor 3 (TLR3)/interferon (IFN)-β-mediated inflammatory responses in human mesangial cells...
2017: Biomedical Research
https://www.readbyqxmd.com/read/28791669/strategies-for-preventing-peritoneal-fibrosis-in-peritoneal-dialysis-patients-new-insights-based-on-peritoneal-inflammation-and-angiogenesis
#14
REVIEW
Zhen Zhang, Na Jiang, Zhaohui Ni
Peritoneal dialysis (PD) is an established form of renal replacement therapy. Long-term PD leads to morphologic and functional changes to the peritoneal membrane (PM), which is defined as peritoneal fibrosis, a known cause of loss of peritoneal ultrafiltration capacity. Inflammation and angiogenesis are key events during the pathogenesis of peritoneal fibrosis. This review discusses the pathophysiology of peritoneal fibrosis and recent research progress on key fibrogenic molecular mechanisms in peritoneal inflammation and angiogenesis, including Toll-like receptor ligand-mediated, NOD-like receptor protein 3/interleukin-1β, vascular endothelial growth factor, and angiopoietin-2/Tie2 signaling pathways...
August 8, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28791417/diverse-gene-expression-patterns-in-response-to-anticancer-drugs-between-human-and-mouse-cell-lines-revealed-by-a-comparative-transcriptomic-analysis
#15
Yong Guo, Zhuoran Liang, Xiaoliang Hou, Zhi Zhang
The aim of the present study was to perform comparative genomics using gene expression profile datasets of mice and humans who had been treated with anticancer drugs, to determine the similarities and differences in the antitumor mechanisms in the two mammals. This involved data mining of antitumor gene expression regulation, and screening of genetic loci from experimental mouse models of antitumor targets, to provide a theoretical basis of drug design. Subsequently, 9 overlapping genes with opposite expression patterns were identified across mouse and human cell lines that were treated with a specific cyclin‑dependent kinase 4/6 inhibitor, PD0332991...
August 4, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28790362/double-stranded-rna-induces-chicken-t-cell-lymphoma-apoptosis-by-trif-and-nf-%C3%AE%C2%BAb
#16
Haitao Zou, Ruixue Su, Jing Ruan, Hongxia Shao, Kun Qian, Jianqiang Ye, Yongxiu Yao, Venugopal Nair, Aijian Qin
Toll-like receptor-3 (TLR3), a member of the pathogen recognition receptor family, has been reported to activate immune response and to exhibit pro-apoptotic activity against some tumor cells. However it is unclear whether TLR3 has same function against chicken lymphoma. In this paper we investigated the effect of TLR3 activation on a Marek's disease lymphoma-derived chicken cell line, MDCC-MSB1. The TLR3 agonist poly (I:C) activated TLR3 pathway and inhibited tumor cells proliferation through caspase-dependent apoptosis...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28790196/trif-dependent-toll-like-receptor-signaling-suppresses-scd1-transcription-in-hepatocytes-and-prevents-diet-induced-hepatic-steatosis
#17
Jing Chen, Jin Li, Jensen H C Yiu, Jenny K W Lam, Chi-Ming Wong, Bernhard Dorweiler, Aimin Xu, Connie W Woo
Nonalcoholic fatty liver disease (NAFLD) includes a spectrum of diseases that ranges in severity from hepatic steatosis to steatohepatitis, the latter of which is a major predisposing factor for liver cirrhosis and cancer. Toll-like receptor (TLR) signaling, which is critical for innate immunity, is generally believed to aggravate disease progression by inducing inflammation. Unexpectedly, we found that deficiency in TIR domain-containing adaptor-inducing interferon-β (TRIF), a cytosolic adaptor that transduces some TLR signals, worsened hepatic steatosis induced by a high-fat diet (HFD) and that such exacerbation was independent of myeloid cells...
August 8, 2017: Science Signaling
https://www.readbyqxmd.com/read/28789951/hepatoprotective-activities-of-rosmarinic-acid-against-extrahepatic-cholestasis-in-rats
#18
Shih-Yi Lin, Ya-Yu Wang, Wen-Ying Chen, Su-Lan Liao, Su-Tze Chou, Ching-Ping Yang, Chun-Jung Chen
Though rosmarinic acid possesses nutritional, pharmaceutical, and toxic properties and shows therapeutic potential on liver diseases, its therapeutic effects against cholestatic liver diseases have not been proven. Using an extrahepatic cholestasis rat model by bile-duct ligation (BDL), daily oral administration of rosmarinic acid showed improvement effects on liver histology, serum biochemicals, ductular reaction, oxidative stress, inflammation, and fibrosis. Rosmarinic acid alleviated BDL-induced transforming growth factor beta-1 (TGF-β1) production and hepatic collagen deposition, and the anti-fibrotic effects were accompanied by reductions in matrix-producing cells and Smad2/3...
August 5, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28783736/glutamate-alleviates-muscle-protein-loss-by-modulating-tlr4-nods-akt-foxo-and-mtor-signaling-pathways-in-lps-challenged-piglets
#19
Ping Kang, Xiuying Wang, Huanting Wu, Huiling Zhu, Yongqing Hou, Longmei Wang, Yulan Liu
The experiment was conducted to study the effect of the glutamate (Glu) on muscle protein loss through toll-like receptor 4 (TLR4), nucleotide-binding oligomerization domain proteins (NODs), Akt/Forkhead Box O (Akt/FOXO) and mammalian target of rapamycin (mTOR) signaling pathways in LPS-challenged piglets. Twenty-four weaned piglets were assigned into four treatments: (1) Control; (2) LPS+0% Glu; (3) LPS + 1.0% Glu; (4) LPS + 2.0% Glu. The experiment was lasted for 28 days. On d 28, the piglets in the LPS challenged groups were injected with LPS on 100 μg/kg body weight (BW), and the piglets in the control group were injected with the same volume of 0...
2017: PloS One
https://www.readbyqxmd.com/read/28782620/anti-inflammatory-effect-of-cortex-eucommiae-via-modulation-of-the-toll-like-receptor-4-pathway-in-lipopolysaccharide-stimulated-raw-264-7-macrophages
#20
Wonil Koh, Joon-Shik Shin, Jinho Lee, In-Hee Lee, Sang Kook Lee, In-Hyuk Ha, Hwa-Jin Chung
ETHNOPHARMOCOLOGICAL RELEVANCE: Cortex Eucommiae (CE), the bark of Eucommia ulmoides Oliv., has been traditionally used for its kidney-tonifying and bone- and tendon-enhancing properties in Korea, China, and Japan. CE has been historically prescribed for inflammatory conditions such as arthritis of the knee and ankle. AIM OF THE STUDY: Although CE has recently been shown to suppress inflammation in scientific studies, whether this effect involves modulation of the toll-like receptor 4 (TLR-4) pathway is currently unknown...
August 3, 2017: Journal of Ethnopharmacology
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