keyword
MENU ▼
Read by QxMD icon Read
search

Toll like receptor

keyword
https://www.readbyqxmd.com/read/29144391/antimicrobial-peptide-epinecidin-1-modulates-myd88-protein-levels-via-the-proteasome-degradation-pathway
#1
Bor-Chyuan Su, Jyh-Yih Chen
The cationic antimicrobial peptide epinecidin-1 was identified from Epinephelus coioides and possesses multiple biological functions, including antibacterial, antifungal, anti-tumor, and immunomodulatory effects. In addition, epinecidin-1 suppresses lipopolysaccharide (LPS)-induced inflammation by neutralizing LPS and ameliorating LPS/Toll-like receptor (TLR)-4 internalization. However, it is unclear whether the actions of epinecidin-1 depend on the regulation of TLR adaptor protein MyD88 or endogenous TLR signaling antagonists, which include A20, interleukin-1 receptor associated kinase (IRAK)-M, and suppressor of cytokine signaling (SOCS)-1...
November 16, 2017: Marine Drugs
https://www.readbyqxmd.com/read/29144049/characterization-of-children-with-recurrent-eczema-herpeticum-and-response-to-treatment-with-interferon-gamma
#2
Kavita Darji, Stephanie Frisch, Eric Adjei Boakye, Elaine Siegfried
BACKGROUND/OBJECTIVES: Interferon gamma (IFN-γ) has been used treat severe atopic dermatitis, with equivocal results. Recurrent eczema herpeticum is an underappreciated, therapeutically challenging complication of severe atopic dermatitis. Defects in IFN-γ and other cytokine pathways have been identified in individuals with confirmed eczema herpeticum. This suggests possible benefit from IFN-γ treatment for confirmed eczema herpeticum. The objective of the current study was to evaluate immunologic and microbial parameters and response to IFN-γ treatment in children with confirmed eczema herpeticum...
November 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/29142761/aeromonas-hydrophila-utilizes-tlr4-topology-for-synchronous-activation-of-myd88-and-trif-to-orchestrate-anti-inflammatory-responses-in-zebrafish
#3
Nidhi Srivastava, Asha Shelly, Manmohan Kumar, Archana Pant, Bhabatosh Das, Tanmay Majumdar, Shibnath Mazumder
Toll-like receptor 4 (TLR4) plays a critical role in host immunity against Gram-negative bacteria. It transduces signals through two distinct TIR-domain-containing adaptors, MyD88 and TRIF, which function at the plasma membrane and endosomes, respectively. Using zebrafish Aeromonas hydrophila infection model, we demonstrate that synchronization of MyD88 and TRIF dependent pathways is critical for determining the fate of infection. Zebrafish were infected with A. hydrophila, and bacterial recovery studies suggested its effective persistence inside the host...
2017: Cell Death Discovery
https://www.readbyqxmd.com/read/29142418/marantodes-pumilum-blume-kuntze-inhibited-secretion-of-lipopolysaccharide-and-monosodium-urate-crystal-stimulated-cytokines-and-plasma-prostaglandin-e2
#4
Eldiza Puji Rahmi, Jamia Azdina Jamal, Endang Kumolosasi, Juriyati Jalil, Nor-Ashila Aladdin
Background: Marantodes pumilum is traditionally used for dysentery, gonorrhea, and sickness in the bones. Previous studies revealed its antibacterial and xanthine oxidase inhibitory activities. Objective: To evaluate the inhibitory effects of three M. pumilum varieties on the secretion of lipopolysaccharide (LPS)- and monosodium urate crystal (MSU)-induced cytokines and plasma prostaglandin E2 (PGE2) in vitro. Materials and Methods: The leaves and roots of M...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29142002/toll-like-receptor-2-has-a-prominent-but-nonessential-role-in-innate-immunity-to-staphylococcus-aureus-pneumonia
#5
Shawn J Skerrett, Marissa H Braff, H Denny Liggitt, Craig E Rubens
Staphylococcus aureus is an important cause of acute bacterial pneumonia. Toll-like receptor 2 (TLR2) recognizes multiple components of the bacterial cell wall and activates innate immune responses to gram-positive bacteria. We hypothesized that TLR2 would have an important role in pulmonary host defense against S. aureus TLR null (TLR2(-/-)) mice and wild type (WT) C57BL/6 controls were challenged with aerosolized S. aureus at a range of inocula for kinetic studies of cytokine and antimicrobial peptide expression, lung inflammation, bacterial killing by alveolar macrophages, and bacterial clearance...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29141870/ig%C3%AE-ubiquitination-activates-pi3k-signals-required-for-endosomal-sorting
#6
Margaret Veselits, Azusa Tanaka, Yaoqing Chen, Keith Hamel, Malay Mandal, Matheswaran Kandasamy, Balaji Manicassamy, Shannon K O'Neill, Patrick Wilson, Roger Sciammas, Marcus R Clark
A wealth of in vitro data has demonstrated a central role for receptor ubiquitination in endocytic sorting. However, how receptor ubiquitination functions in vivo is poorly understood. Herein, we report that ablation of B cell antigen receptor ubiquitination in vivo uncouples the receptor from CD19 phosphorylation and phosphatidylinositol 3-kinase (PI3K) signals. These signals are necessary and sufficient for accumulating phosphatidylinositol (3,4,5)-trisphosphate (PIP3) on B cell receptor-containing early endosomes and proper sorting into the MHC class II antigen-presenting compartment (MIIC)...
November 15, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29140241/direct-biomarkers-of-microbial-translocation-correlate-with-immune-activation-in-adult-zambians-with-environmental-enteropathy-and-hepatosplenic-schistosomiasis
#7
Patrick Kaonga, Evans Kaimoyo, Ellen Besa, Kanekwa Zyambo, Edford Sinkala, Paul Kelly
Microbial translocation is a poorly understood consequence of several disorders such as environmental enteropathy (EE) and hepatosplenic schistosomiasis (HSS). Herein, we compared biomarkers of microbial origin and immune activation in adults with these disorders and in healthy controls. A cross-sectional study was conducted in participants with EE recruited from Misisi compound, Lusaka, Zambia; HSS patients and healthy controls from the University Teaching Hospital, Lusaka. Plasma lipopolysaccharides (LPSs) was measured by limulus amoebocyte lysate assay, plasma 16S ribosomal RNA (16S rRNA) gene copy number was quantified by quantitative real-time polymerase chain reaction, Toll-like receptor ligand (TLRL) activity by QUANTI-Blue detection medium, and cytokines from cell culture supernatant by Cytometric Bead Array...
November 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29138827/gambogic-acid-inhibits-spinal-cord-injury-and-inflammation-through-suppressing-the-p38-and-akt-signaling-pathways
#8
Qiao Fu, Chaojian Li, Lehua Yu
Gamboge is the dry resin secreted by Garcinia hanburyi Hook.f, with the function of promoting blood circulation, detoxification, hemostasis and killing insects, used for the treatment of cancer, brain edema and other diseases. Gambogic acid is the main effective constituent of Gamboge. The present study investigated the protective effects of gambogic acid on spinal cord injury (SCI) and its anti‑inflammatory mechanism in an SCI model in vivo. Basso, Beattie and Bresnahan (BBB) testing was used to detect the protective effects of gambogic acid on nerve function of SCI rats...
November 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29138821/protective-effects-of-oxymatrine-against-lipopolysaccharide-d%C3%A2-galactosamine%C3%A2-induced-acute-liver-failure-through-oxidative-damage-via-activation-of-nrf2-ho%C3%A2-1-and-modulation-of-inflammatory-tlr4%C3%A2-signaling-pathways
#9
Jian Xu, Chengmin Li, Ziwei Li, Chan Yang, Lan Lei, Wei Ren, Yan Su, Chunping Chen
Oxymatrine has a variety of pharmacological functions, including anti-viral, anti-liver fibrotic, anti-cancer, anti‑bacterial, anti‑epidemic, analgesic, anti‑allergy and anti‑inflammatory properties. The present study aimed to investigate the protective effects of oxymatrine against lipopolysaccharide (LPS)/D‑galactosamine (D‑GalN)‑induced acute liver failure and the associated underlying mechanisms. Mice were administrated 4 mg/kg LPS and 600 mg/kg D‑GalN. Then, mice in the Oxymatrine group were treated with 120 mg/kg of oxymatrine for 4 weeks...
November 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29138803/toll-like-receptors-tlr1-2-tlr6-and-muc5b-as-binding-interaction-partners-with-cytostatic-proline-rich-polypeptide-1-in-human-chondrosarcoma
#10
Karina Galoian, Silva Abrahamyan, Gor Chailyan, Amir Qureshi, Parthik Patel, Gil Metser, Alexandra Moran, Inesa Sahakyan, Narine Tumasyan, Albert Lee, Tigran Davtyan, Samvel Chailyan, Armen Galoyan
Metastatic chondrosarcoma is a bone malignancy not responsive to conventional therapies; new approaches and therapies are urgently needed. We have previously reported that mTORC1 inhibitor, antitumorigenic cytostatic proline rich polypeptide 1 (PRP-1), galarmin caused a significant upregulation of tumor suppressors including TET1/2 and SOCS3 (known to be involved in inflammatory processes), downregulation of oncoproteins and embryonic stem cell marker miR-302C and its targets Nanog, c-Myc and Bmi-1 in human chondrosarcoma...
November 9, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/29138532/ubiquitin-specific-protease-2-modulates-the-lipopolysaccharide-elicited-expression-of-proinflammatory-cytokines-in-macrophage-like-hl-60-cells
#11
Hiroshi Kitamura, Takeshi Ishino, Yoshinori Shimamoto, Jun Okabe, Tomomi Miyamoto, Eiki Takahashi, Ichiro Miyoshi
We investigated the regulatory roles of USP2 in mRNA accumulation of proinflammatory cytokines in macrophage-like cells after stimulation with a toll-like receptor (TLR) 4 ligand, lipopolysaccharide (LPS). Human macrophage-like HL-60 cells, mouse macrophage-like J774.1 cells, and mouse peritoneal macrophages demonstrated negative feedback to USP2 mRNA levels after LPS stimulation, suggesting that USP2 plays a significant role in LPS-stimulated macrophages. USP2 knockdown (KD) by short hairpin RNA in HL-60 cells promoted the accumulation of transcripts for 25 of 104 cytokines after LPS stimulation...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29138299/induction-of-antiviral-immune-response-through-recognition-of-the-repeating-subunit-pattern-of-viral-capsids-is-toll-like-receptor-2-dependent
#12
Kelly M Shepardson, Benjamin Schwarz, Kyle Larson, Rachelle V Morton, John Avera, Kimberly McCoy, Alayna Caffrey, Ann Harmsen, Trevor Douglas, Agnieszka Rynda-Apple
Although viruses and viral capsids induce rapid immune responses, little is known about viral pathogen-associated molecular patterns (PAMPs) that are exhibited on their surface. Here, we demonstrate that the repeating protein subunit pattern common to most virus capsids is a molecular pattern that induces a Toll-like-receptor-2 (TLR2)-dependent antiviral immune response. This early antiviral immune response regulates the clearance of subsequent bacterial superinfections, which are a primary cause of morbidities associated with influenza virus infections...
November 14, 2017: MBio
https://www.readbyqxmd.com/read/29137928/camkii%C3%AE-expression-in-a-mouse-model-of-nmdar-hypofunction-schizophrenia-putative-roles-for-igf-1r-and-tlr4
#13
O M Ogundele, C C Lee
Schizophrenia (SCZ) is a neuropsychiatric disorder that is linked to social behavioral deficits and other negative symptoms associated with hippocampal synaptic dysfunction. Synaptic mechanism of schizophrenia is characterized by loss of hippocampal N-Methyl-d-Aspartate Receptor (NMDAR) activity (NMDAR hypofunction) and dendritic spines. Previous studies show that genetic deletion of hippocampal synaptic regulatory calcium-calmodulin dependent kinase II alpha (CaMKIIα) cause synaptic and behavioral defects associated with schizophrenia in mice...
November 11, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/29137270/human-mesenchymal-stem-cells-ameliorate-experimental-pulmonary-hypertension-induced-by-maternal-inflammation-and-neonatal-hyperoxia-in-rats
#14
Chung-Ming Chen, Willie Lin, Liang-Ti Huang, Hsiu-Chu Chou
Pulmonary hypertension is a critical problem in infants with bronchopulmonary dysplasia. This study determined the therapeutic effects of human mesenchymal stem cells (MSCs) on pulmonary hypertension in an animal model. Pregnant Sprague-Dawley rats were intraperitoneally injected with lipopolysaccharide (LPS, 0.5 mg/kg/day) on gestational days 20 and 21. The pups were randomly assigned to two treatment conditions: room air (RA) or an O2-enriched atmosphere. On postnatal day 5, they were intratracheally transplanted with human MSCs (3 × 10(5) and 1 × 10(6) cells) in 0...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29136779/juglanin-ameliorates-lps-induced-neuroinflammation-in-animal-models-of-parkinson-s-disease-and-cell-culture-via-inactivating-tlr4-nf-%C3%AE%C2%BAb-pathway
#15
Fang-Xue Zhang, Ren-Shi Xu
Parkinson's disease (PD) is a common neuro-degenerative disorder, and novel therapeutic targets are required for the treatment of PD. Juglanin is a natural compound extracted from the crude Polygonum aviculare, exhibiting anti-inflammatory, anti-oxidant and anti-cancer activities. In our study, PD in mice was induced by systemic LPS treatment as evidenced by enhanced α-synuclein and reduced tyrosine hydroxylase (TH), which were reversed by juglanin treatment. Moreover, juglanin administration attenuated LPS-caused behavioral and memory impairments and reduced LPS-induced enhancement of neuro-degenerative markers, including amyloid β (Aβ) and p-Tau...
November 7, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29136637/transcriptional-profiling-of-toll-like-receptor-2-deficient-primary-murine-brain-cells-during-toxoplasma-gondii-infection
#16
Kousuke Umeda, Sachi Tanaka, Fumiaki Ihara, Junya Yamagishi, Yutaka Suzuki, Yoshifumi Nishikawa
BACKGROUND: Toxoplasma gondii is capable of persisting in the brain, although it is efficiently eliminated by cellular immune responses in most other sites. While Toll-like receptor 2 (TLR2) reportedly plays important roles in protective immunity against the parasite, the relationship between neurological disorders induced by T. gondii infection and TLR2 function in the brain remains controversial with many unknowns. In this study, primary cultured astrocytes, microglia, neurons, and peritoneal macrophages obtained from wild-type and TLR2-deficient mice were exposed to T...
2017: PloS One
https://www.readbyqxmd.com/read/29136627/toll-like-receptor-4-reduces-occludin-and-zonula-occludens-1-to-increase-retinal-permeability-both-in-vitro-and-in-vivo
#17
Li Liu, Youde Jiang, Jena J Steinle
We reported that β-adrenergic receptors regulate toll-like receptor 4 (TLR4) signaling in the retina of diabetic mice and in retinal endothelial cells (REC) and Müller cells. We hypothesized that TLR4 regulates retinal permeability both in vitro and in vivo in the retinal vasculature. We used REC cultured in normal and high-glucose conditions and TLR4 siRNA treatments for cell culture studies of permeability and protein analyses of tumor necrosis factor α, occludin, and zonula occludens 1 (ZO-1). We used endothelial cell (EC)-specific Cre-Lox TLR4 knockout mice to study retinal permeability and neuronal and vascular changes following exposure to ocular ischemia/reperfusion (I/R) used as a retinal stressor...
November 15, 2017: Journal of Vascular Research
https://www.readbyqxmd.com/read/29136027/expression-of-toll-like-receptors-tlrs-in-the-lungs-of-an-experimental-sepsis-mouse-model
#18
Anargyros Bakopoulos, Alkistis Kapelouzou, Diamantis I Tsilimigras, Michalis Katsimpoulas, Dimitrios Schizas, Chrysostomos Aravanis, Evaggelos Balafas, Manolis Mavroidis, Kitty Pavlakis, Anastasios Machairas, Theodore Liakakos
BACKGROUND: Sepsis is a condition characterized by high mortality rates and often accompanied by multiple-organ dysfunction. During sepsis, respiratory system may be affected and possibly result in acute respiratory distress syndrome (ARDS). Toll-like receptors (TLRs), as a first line defense against invading pathogens, seem to be highly expressed in septic states. Therefore, expression of TLRs in the lungs of a sepsis animal model could indicate the involvement of the respiratory system and appear as a severity index of the clinical course...
2017: PloS One
https://www.readbyqxmd.com/read/29136006/lipopolysaccharide-potentiates-platelet-responses-via-toll-like-receptor-4-stimulated-akt-erk-pla2-signalling
#19
Maria E Lopes Pires, Simon R Clarke, Sisi Marcondes, Jonathan M Gibbins
Lipopolysaccharide (LPS) from the cell envelope of Gram-negative bacteria is a principal cause of the symptoms of sepsis. LPS has been reported to modulate the function of platelets although the underlying mechanisms of LPS action in these cells remain unclear. Platelets express the Toll-like receptor 4 (TLR4) which serves as a receptor for LPS, although the potential role of TLR4 and associated cell signalling in controlling platelet responses to LPS has not been extensively explored. In this study, we therefore investigated the actions of LPS prepared from different strains of Escherichia coli on platelet function, the underlying signalling mechanisms, and the potential role of TLR4 in orchestrating these...
2017: PloS One
https://www.readbyqxmd.com/read/29135088/the-role-of-toll-like-receptors-in-ovarian-cancer
#20
Vlad Gata, Ignat Florin Laurentiu
Ovarian cancer (OC) is the leading cause of death in gynecological malignancies in western countries. Chemoresistance represents a major issue and a better understanding of the interactions that take place within the tumor microenvironment is needed, such as the connection between inflammation and cancer. Toll like receptors (TLRs) are part of the basic mechanisms that are involved in the activation of the innate immune system, with extensive activation of various transcription factors, that subsequently lead to an adaptive immune response, making them key players that modulate the inflammatory response and tumor dynamics...
September 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
keyword
keyword
28184
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"