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Toll—like receptor

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https://www.readbyqxmd.com/read/29667554/establishment-of-novel-reporter-cells-stably-maintaining-transcription-factor-driven-human-secreted-alkaline-phosphatase-expression
#1
Riho Kurata, Asuka Kumagai, Xiaofeng Cui, Masamitsu Harada, Jun Nagai, Yasuhiro Yoshida, Kei-Ichi Ozaki, Yoshimasa Tanaka, Tomo Yonezawa
BACKGROUND: Transcriptional regulation is very important and pivotal function in myriad biological responses. Thus, methods to determine transcriptional activity are required in not only basic medical research but also drug discovery. We established novel reporter constructs using human secreted embryonic alkaline phosphatase (SEAP) and Epstein-Barr virus nuclear antigen (EBNA) 1, which can maintain constructs synchronized to host cell replication. METHODS: We established nuclear factor-kappa B (NFkB) or interferon regulatory factor (IRF) driven SEAP expression constructs and then, introduced them into culture cells...
April 17, 2018: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/29667229/uc-1v150-a-potent-tlr7-agonist-capable-of-activating-macrophages-and-potentiating-mab-mediated-target-cell-deletion
#2
Lekh N Dahal, Adam Gadd, Alexander D Edwards, Mark S Cragg, Stephen A Beers
Toll like receptors (TLR) are critical mediators of the immune system with their activation linked to infection, inflammation and the pathogenesis of immune diseases including autoimmunity and cancer. For this reason, over the last two decades, TLR and their associated signalling pathways have been targeted therapeutically to enhance innate and adaptive immunity. Several TLR ligands, both endogenous and synthetic are at various phases of clinical testing, and new ligands are continually emerging. Agonists of TLR7 are known immune response modifiers, simultaneously stimulating several cell types, resulting in immune cell activation and cytokine and chemokine release...
April 18, 2018: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/29666781/role-of-muramyl-dipeptide-in-lipopolysaccharide-mediated-biological-activity-and-osteoclast-activity
#3
REVIEW
Hideki Kitaura, Masahiko Ishida, Keisuke Kimura, Haruki Sugisawa, Akiko Kishikawa, Kazuhiro Shima, Saika Ogawa, Jiawei Qi, Wei-Ren Shen
Lipopolysaccharide (LPS) is an endotoxin and bacterial cell wall component that is capable of inducing inflammation and immunological activity. Muramyl dipeptide (MDP), the minimal essential structural unit responsible for the immunological activity of peptidoglycans, is another inflammation-inducing molecule that is ubiquitously expressed by bacteria. Several studies have shown that inflammation-related biological activities were synergistically induced by interactions between LPS and MDP. MDP synergistically enhances production of proinflammatory cytokines that are induced by LPS exposure...
2018: Analytical Cellular Pathology (Amsterdam)
https://www.readbyqxmd.com/read/29666152/phenylmethimazole-abrogates-diet-induced-inflammation-glucose-intolerance-and-nafld
#4
Ashley Patton, Tyler Church, Caroline Wilson, Jean Thuma, Douglas J Goetz, Darlene E Berryman, Edward O List, Frank L Schwartz, Kelly D McCall
Nonalcoholic fatty liver disease (NAFLD) is the hepatic manifestation of both metabolic and inflammatory diseases and has become the leading chronic liver disease worldwide. High fat (HF) diets promote an increased uptake and storage of free fatty acids (FFAs) and triglycerides (TGs) in hepatocytes, which initiates steatosis and induces lipotoxicity, inflammation, and insulin resistance. Activation and signaling of Toll-like receptor 4 (TLR4) by FFAs induces inflammation evident in NAFLD and insulin resistance...
April 17, 2018: Journal of Endocrinology
https://www.readbyqxmd.com/read/29664631/cereal-fiber-ameliorates-high-fat-cholesterol-diet-induced-atherosclerosis-by-modulating-nlrp3-inflammasome-pathway-in-apoe-mice
#5
Ru Zhang, Shufen Han, Zheng Zhang, Weiguo Zhang, Jing Yang, Zhongxiao Wan, Liqiang Qin
Cereal fiber is associated with decreasing the risk of cardiovascular diseases. However, whether cereal fiber modulates inflammatory response and improves atherosclerosis remains unclear. This study evaluated the anti-atherosclerotic effect of cereal fibers from oat or wheat bran and explored the potential anti-inflammatory mechanisms. Male ApoE-/- mice were given a high fat/cholesterol (HFC) diet, HFC diet supplemented with 0.8% oat fiber or wheat bran fiber. After 18 weeks of feeding period, serum lipids and inflammatory cytokines were measured...
April 17, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29663503/mir-135a-represses-oxidative-stress-and-vascular-inflammatory-events-via-targeting-toll-like-receptor-4-in-atherogenesis
#6
Xian-Jin Du, Jing-Min Lu
Plenty of microRNAs have been identified as critical mediators in atherosclerosis progression, which is still a great threat to human health. Oxidative stress and inflammation have been implicated to contribute a lot to atherosclerosis development. MiR-135a is abnormally expressed in various cancer types, however its function in atherosclerosis is largely unexplored. Ox-LDL is commonly recognized as a crucial atherosclerosis regulator. In our current study, we observed ox-LDL was able to induce RAW264.7 cell apoptosis and meanwhile miR-135a was restrained by ox-LDL both dose-dependently and time- dependently...
April 16, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29663491/mir-370-inhibits-vascular-inflammation-and-oxidative-stress-triggered-by-oxidized-low-density-lipoprotein-through-targeting-tlr4
#7
Dan Tian, Yin Sha, Jing-Min Lu, Xian-Jin Du
Atherosclerosis, as a chronic cardiovascular disease, still remains a serious threat to human health. Inflammation and oxidative stress are commonly involved in various stages of atherosclerosis development. MicroRNAs are reported to play important roles in macrophages, which can respond to inflammation and oxidative stress. In our current study, we focused on the biological roles of miR-370 in atherosclerosis. According to the previously research, miR-370 was downregulated in AS mice models. Oxidized low-density lipoprotein (Ox-LDL) is regarded as a crucial regulator of atherosclerosis and we observed that miR-370 was decreased by ox-LDL dose-dependently and time-dependently in THP-1 cells...
April 16, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29662819/variable-localization-of-toll-like-receptors-in-human-fallopian-tube-epithelial-cells
#8
Fatemehsadat Amjadi, Zahra Zandieh, Ensieh Salehi, Reza Jafari, Nasrin Ghasemi, Abbas Aflatoonian, Alireza Fazeli, Reza Aflatoonian
Objective: To determine the localization, expression, and function of Toll-like receptors (TLRs) in fallopian tube epithelial cells. Methods: The localization of TLRs in fallopian tube epithelial cells was investigated by immunostaining. Surprisingly, the intensity of staining was not equal in the secretory and ciliated cells. After primary cell culture of fallopian tube epithelial cells, ring cloning was used to isolate colonies of ciliated epithelial cells, distinct from non-ciliated epithelial cells...
March 2018: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/29662615/transcriptome-and-proteome-profiling-reveals-stress-induced-expression-signatures-of-imiquimod-treated-tasmanian-devil-facial-tumor-disease-dftd-cells
#9
Amanda L Patchett, Richard Wilson, Jac C Charlesworth, Lynn M Corcoran, Anthony T Papenfuss, Bruce A Lyons, Gregory M Woods, Cesar Tovar
As a topical cancer immunotherapy, the toll-like receptor 7 ligand imiquimod activates tumor regression via stimulation of immune cell infiltration and cytotoxic responses. Imiquimod also exerts direct pro-apoptotic effects on tumor cells in vitro , but a role for these effects in imiquimod-induced tumor regression remains undefined. We previously demonstrated that cell lines derived from devil facial tumor disease (DFTD), a transmissible cancer threatening the survival of the Tasmanian devil ( Sarcophilus harrisii ), are sensitive to imiquimod-induced apoptosis...
March 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29661854/targeting-toll-like-receptors-in-cancer-prevention
#10
EDITORIAL
Karen S Sfanos
There is a pressing need for the development of new prevention strategies for the most common worldwide malignancy, nonmelanoma skin cancer (NMSC), as sun protection efforts have not proven to be completely effective. Interestingly, despite the known circumstance that individuals undergoing chronic immunosuppression are at a substantially increased risk for developing NMSC, in this issue of Cancer Prevention Research , Blohm-Mangone and colleagues provide new evidence that topical application of the Toll-like receptor 4 (TLR4) antagonist resatorvid may be efficacious as a chemopreventive agent in NMSC specifically via blocking UV-induced inflammatory signaling...
April 16, 2018: Cancer Prevention Research
https://www.readbyqxmd.com/read/29661317/a-%C3%AE-glucan-from-durvillaea-antarctica-has-immunomodulatory-effects-on-raw264-7-macrophages-via-toll-like-receptor-4
#11
Yi Yang, Xiaoliang Zhao, Jia Li, Hao Jiang, Xindi Shan, Ya Wang, Wenbang Ma, Jiejie Hao, Guangli Yu
We studied the mechanisms underlying the immunostimulatory effects of aβ-1,3/1,6-glucan (BG136) from Durvillaea Antarctica. Our data showed that BG136 promoted the activation of MAPKs and NF-κB signaling pathways and cytokines production. BG136 did not increase MCP-1 or NO production or phosphorylation of NF-κB and MAPK in TLR4 siRNA knockdown cells, indicating that BG136 activates macrophages through TLR4. Flow cytometry analysis and confocal experiment showed that BG136 bound to TLR4 expressed on RAW264...
July 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29661181/tlr4-modulates-inflammatory-gene-targets-in-the-retina-during-bacillus-cereus-endophthalmitis
#12
Phillip S Coburn, Frederick C Miller, Austin L LaGrow, Salai Madhumathi Parkunan, C Blake Randall, Rachel L Staats, Michelle C Callegan
BACKGROUND: Endophthalmitis is a serious intraocular infection that frequently results in significant inflammation and vision loss. Because current therapeutics are often unsuccessful in mitigating damaging inflammation during endophthalmitis, more rational targets are needed. Toll-like receptors (TLRs) recognize specific motifs on invading pathogens and initiate the innate inflammatory response. We reported that TLR4 contributes to the robust inflammation which is a hallmark of Bacillus cereus endophthalmitis...
April 16, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29661034/the-use-of-chitosan-pla-nano-fibers-by-emulsion-eletrospinning-for-periodontal-tissue-engineering
#13
Renze Shen, Weihong Xu, Yanxiang Xue, Luyuan Chen, Haicheng Ye, Enyi Zhong, Zhanchao Ye, Jie Gao, Yurong Yan
OBJECTIVE: In this study, nanofibrous scaffolds base on pure polylactic acid (PLA) and chitosan/PLA blends were fabricated by emulsion eletrospinning. By modulating their mechanical and biological properties, cell-compatible and biodegradable scaffolds were developed for periodontal bone regeneration. METHODS: Pure PLA and different weight ratios of chitosan nano-particle/PLA nano-fibers were fabricated by emulsion eletrospinning. Scanning electron microscope (SEM) was performed to observe the morphology of nano-fibers...
April 16, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29660736/identification-of-key-genes-and-pathways-in-rheumatoid-arthritis-gene-expression-profile-by-bioinformatics
#14
Wenzong Lu, Gun Li
OBJECTIVE: The aim of this study was to identify potential key candidate genes and uncover their potential mechanisms in rheumatoid arthritis. MATERIALS AND METHODS: The gene expression profiles of GSE12021, GSE55457, GSE55584 and GSE55235 were downloaded from the gene expression omnibus database, including 45 rheumatoid arthritis and 29 normal samples. The differentially expressed genes between the two types of samples were identified with the Linear Models for Microarray Analysis package using R language...
April 16, 2018: Acta Reumatológica Portuguesa
https://www.readbyqxmd.com/read/29660306/ablation-of-toll-like-receptor-4-attenuates-aging-induced-myocardial-remodeling-and-contractile-dysfunction-through-ncori-hdac1-mediated-regulation-of-autophagy
#15
Shuyi Wang, Wei Ge, Carrie Harns, Xianzhong Meng, Yingmei Zhang, Jun Ren
Aging is usually accompanied with overt structural and functional changes as well as suppressed autophagy in the heart although the precise regulatory mechanisms are somewhat unknown. Here we evaluated the role of the innate proinflammatory mediator toll-like receptor 4 (TLR4) in cardiac aging and the underlying mechanism with a focus on autophagy. Cardiac geometry and function were monitored in young or old wild-type (WT) and TLR4 knockout (TLR4-/- ) mice using echocardiography, IonOptix® edge-detection and fura-2 techniques...
April 13, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29660148/in-vivo-effect-of-a-tlr5-snp-c1205t-on-salmonella-enterica-serovar-typhimurium-infection-in-weaned-specific-pathogen-free-landrace-piglets
#16
Yoshihiro Muneta, Nobuo Arai, Yoko Yakabe, Masahiro Eguchi, Tomoyuki Shibahara, Akiko Sakuma, Hiroki Shinkai, Hirohide Uenishi, Kensuke Hirose, Masato Akiba
Toll-like receptor 5 (TLR5) is a pattern-recognition receptor for bacterial flagellin. We previously reported that a single nucleotide polymorphism (SNP) of swine TLR5, C1205T, impairs the recognition of Salmonella typhimurium (ST) flagellin and ethanol-killed Salmonella Choleraesuis (SC). Here, weaned, specific pathogen-free (SPF) Landrace piglets, which have CC, CT, or TT genotypes were orally infected with ST (L-3569 strain) to validate the effect of this specific SNP on ST infection in vivo. Eighteen ST-infected piglets (6 each with CC, CT, or TT) exhibited fever and diarrhea for 1 week after infection...
April 16, 2018: Microbiology and Immunology
https://www.readbyqxmd.com/read/29659876/effects-of-lactobacillus-reuteri-lr1-on-the-growth-performance-intestinal-morphology-and-intestinal-barrier-function-in-weaned-pigs
#17
Hongbo Yi, Guangda Yang, Yunxia Xiong, Xiaolu Wen, Zhilin Wang, Xuefen Yang, Kaiguo Gao, Li Wang, Zongyong Jiang
The objective of this study was to investigate the effects of Lactobacillus reuteri LR1, a new strain isolated from the feces of weaned pigs, on the growth performance, intestinal morphology, immune responses, and intestinal barrier function in weaned pigs. A total of 144 weaned pigs (Duroc × Landrace × Yorkshire, 21 d of age) with an initial BW of 6.49 ± 0.02 kg were randomly assigned to 3 dietary treatments with 8 replicate pens, each of per treatment and 6 pigs. Pigs were fed a basal diet (CON, controls), the basal diet supplemented with 100 mg/kg olaquindox and 75 mg/kg aureomycin (OA) or the basal diet supplemented with 5×1010 cfu/kg L...
April 12, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29658605/aerobic-exercise-regulates-blood-lipid-and-insulin-resistance-via-the-toll%C3%A2-like-receptor-4%C3%A2-mediated-extracellular-signal%C3%A2-regulated-kinases-amp%C3%A2-activated-protein-kinases-signaling-pathway
#18
Mei Wang, Sen Li, Fubaihui Wang, Jinhui Zou, Yanfeng Zhang
Diabetes mellitus is a complicated metabolic disease with symptoms of hyperglycemia, insulin resistance, chronic damage and dysfunction of tissues, and metabolic syndrome for insufficient insulin production. Evidence has indicated that exercise treatments are essential in the progression of type‑ІІ diabetes mellitus, and affect insulin resistance and activity of islet β‑cells. In the present study, the efficacy and signaling mechanism of aerobic exercise on blood lipids and insulin resistance were investigated in the progression of type‑ІІ diabetes mellitus...
April 11, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29658581/microrna%C3%A2-146a-toll%C3%A2-like-receptor-4-signaling-protects-against-severe-burn%C3%A2-induced-remote-acute-lung-injury-in-rats-via-anti%C3%A2-inflammation
#19
Jinhua Luo, Jianhua Zhan, Haoyuan You, Xing Cheng
The present study investigated the preventive effects of microRNA (miR)‑146a against severe burn‑induced remote acute lung injury (ALI) in rats and the underlying mechanism. The surface area of the skin was immersed in 100˚C water for 5‑10 sec on the dorsal surface. The expression level of miR‑146a was significantly downregulated in rats with burn‑induced ALI. Downregulation of miR‑146a increased inflammation, and inducible nitric oxide synthase (iNOS) and cyclooxygenase‑2 (COX‑2) expression in a model of ALI in vitro via the promotion of the Toll‑like receptor (TLR)4/nuclear factor (NF)‑κB signaling pathway...
April 12, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29658577/interleukin-29-activates-expression-of-tissue-inhibitor-of-metalloproteinase-1-in-macrophages-via-toll%C3%A2-like-receptor-2
#20
Haoqiang Zhang, Bing Song, Shaoheng He
Obesity and diabetes are characterized by low grade chronic inflammation status and insulin resistance in adipose tissue associated with metalloproteinase inhibitor 1 (TIMP1). Interleukin (IL)29, exhibits multiple immune regulatory activities. However, the role of IL29 and its effects on TIMP1 remain to be elucidated. The present study was designed to investigate the effects of IL29 on expression of TIMP1 in macrophages associated with inflammation in adipose tissue. IL29 and high glucose were used to activate Raw264...
April 11, 2018: Molecular Medicine Reports
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