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https://www.readbyqxmd.com/read/28328108/ex-vivo-infection-of-human-placental-chorionic-villi-explants-with-trypanosoma-cruzi-and-toxoplasma-gondii-induces-different-toll-like-receptor-expression-and-cytokine-chemokine-profiles
#1
Christian Castillo, Lorena Muñoz, Ileana Carrillo, Ana Liempi, Christian Gallardo, Norbel Galanti, Juan Diego Maya, Ulrike Kemmerling
PROBLEM: Trypanosoma cruzi and Toxoplasma gondii present, respectively, low and high congenital transmission rates. The placenta as an immune regulatory organ expresses TLRs, leading to the secretion of cytokines. Both parasites are recognized by TLR-2, TLR-4, and TLR-9. Here, we studied if the parasites induce differences in TLR protein expression, cytokine profiles, and whether receptor inhibition is related to parasite infection. METHOD OF STUDY: Placental tissue explants were infected ex vivo with each parasite, TLRs protein expression, cytokine profile and parasite infection were determined by Western blotting, ELISA and qPCR...
March 22, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28320107/pre-conditioning-with-tanshinone-iia-attenuates-the-ischemia-reperfusion-injury-caused-by-liver-grafts-via-regulation-of-hmgb1-in-rat-kupffer-cells
#2
Xuanfei Li, Yakun Wu, Wenfeng Zhang, Jianping Gong, Yao Cheng
OBJECTIVE: We have evaluated the protective mechanism of tanshinone IIA in ischemia/reperfusion injury (IRI) induced by liver grafts, revealing novel supplementary immunotherapy for liver transplantation. METHODS: The tanshinone IIA preconditioning group (TP group) was pretreated with tanshinone IIA via intraperitoneal injection for 1 week before receiving orthotopic liver transplantation with hepatic arterial ischemia for 30min. The sham-operation group (SO group), control graft group (CG group) and IRI group were pretreated with an equivalent volume of normal saline...
March 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28295231/deficiency-in-irak4-activity-attenuates-manifestations-of-murine-lupus
#3
Michael Murphy, Goutham Pattabiraman, Tissa T Manavalan, Andrei E Medvedev
Interleukin-1 receptor-associated kinase (IRAK) 4 mediates host defense against infections. As an active kinase, IRAK4 elicits full spectra of myeloid differentiation primary response protein (MyD) 88-dependent responses, while kinase-inactive IRAK4 induces a subset of cytokines and negative regulators whose expression is not regulated by mRNA stability. IRAK4 kinase activity is critical for resistance against Streptococcus pneumonia, but its involvement in autoimmunity is incompletely understood. In this study, we determined the role of IRAK4 kinase activity in murine lupus...
March 10, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28293722/pattern-of-cardiotoxin-induced-muscle-remodeling-in-distinct-tlr-4-deficient-mouse-strains
#4
Eustáquio Luiz Paiva-Oliveira, Rafael Ferreira da Silva, Maria Bellio, Thereza Quirico-Santos, Jussara Lagrota-Candido
Tissue damage triggers innate immune response mediated by Toll-like receptor 4 (TLR) that recognizes endogenous host danger molecules associated with cell death and tissue inflammation, although the precise role of TLR-4 signaling in muscle tissue repair is still uncertain. Previously, we observed that TLR-4 exerted a protective effect preventing excessive muscular damage induced by Bothrops jararacussu crude venom. This study aimed to evaluate the involvement of TLR-4 at early stages of muscular tissue remodeling in distinct mouse strains after injection of purified snake venom...
March 14, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28289922/curcumin-inhibits-lipopolysaccharide-lps-induced-endotoxemia-and-airway-inflammation-through-modulation-of-sequential-release-of-inflammatory-mediators-tnf-%C3%AE-and-tgf-%C3%AE-1-in-murine-model
#5
Asha Kumari, D Dash, Rashmi Singh
OBJECTIVE: Curcumin (diferuloylmethane), a major component of turmeric is well known for its anti-inflammatory potential. Present study investigates sequential release of inflammatory mediators post LPS challenge (10 mg/kg,i.p.) causing lung inflammation and its modulation by curcumin through different routes (20 mg/kg, i.p and 10 mg/kg, i.n.) in murine model. Dexamethasone (1 mg/kg, i.p) was used as standard drug. METHODS: Lung Inflammation was evaluated by histopathological analysis, myeloperoxidase (MPO) activity followed by inflammatory cell count and total protein content measurements in bronchoalveolar fluid (BALF)...
March 13, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28288151/pentoxifylline-modulates-lps-induced-hyperinflammation-in-monocytes-of-preterm-infants-in-vitro
#6
Simone S Schüller, Lukas Wisgrill, Elisabeth Herndl, Andreas Spittler, Elisabeth Förster-Waldl, Kambis Sadeghi, Boris W Kramer, Angelika Berger
BACKGROUND: Pentoxifylline (PTX), a methylxanthine derivate with immunomodulating properties, has been used as adjunctive treatment in severe neonatal sepsis. The aim of the study was to investigate PTX's anti-inflammatory effects on LPS stimulated monocytes of preterm neonates in vitro compared to monocytes from term infants and adult controls. METHODS: Whole cord blood and control adult blood samples were incubated with LPS and PTX. The expression of surface markers, phagocytosis, cytokine secretion and Toll-like-receptor (TLR)4 signaling of monocytes were assessed by flow cytometry...
March 13, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28280355/toll-like-receptor-4-as-a-predictor-of-clinical-outcomes-of-estrogen-receptor-negative-breast-cancer-in-saudi-women
#7
Abdelhabib Semlali, Maroua Jalouli, Narasimha Reddy Parine, Abdullah Al Amri, Maha Arafah, Abdulrahman Al Naeem, Sanaa Abdullah Ajaj, Mahmoud Rouabhia, Mohammad Saud Alanazi
The aim of this study was to investigate the association of the common polymorphisms of Toll-like receptor 4 (TLR-4) with breast cancer development in the Saudi Arabian population. Four TLR-4 polymorphisms (rs2770150, rs10759931, rs10759932, and rs4986790) were studied using 127 breast cancer patients and 117 controls. Relative expression of TLR-4 protein in the breast tumor and the matched normal breast tissues was determined in a large cohort of 70 clinical breast samples in a tissue micro-array format by immunohistochemistry using a specific anti-TLR-4 antibody...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28279802/prevention-of-influenza-virus-induced-bacterial-superinfection-by-standardized-echinacea-purpurea-via-regulation-of-surface-receptor-expression-in-human-bronchial-epithelial-cells
#8
Selvarani Vimalanathan, Roland Schoop, Andy Suter, James Hudson
Viral infections may predispose the airways to secondary bacterial infections that can lead to unfavorable progression of principally self-limiting illnesses. Such complicated respiratory infections include pneumonia, bronchitis, sinusitis, acute otitis media, and sepsis, which cause high morbidity and lethality. Some of the pathogenic consequences of viral infections, like the expression of bacterial adhesion receptors and the disturbance of physical barrier integrity due to inflammation, may create permissive conditions for co-infections...
March 7, 2017: Virus Research
https://www.readbyqxmd.com/read/28261302/the-vitamin-d-analogue-paricalcitol-attenuates-hepatic-ischemia-reperfusion-injury-through-down-regulation-of-toll-like-receptor-4-signaling-in-rats
#9
Min Sung Kim, Soyoung Lee, Namhee Jung, Kiho Lee, Jinwoo Choi, Sang-Hoon Kim, Jinhyun Jun, Won-Mee Lee, Yeonsoo Chang, Donghee Kim
INTRODUCTION: Recent studies have revealed that vitamin D and its synthetic analogues have a protective effect on experimental ischemia/reperfusion (I/R) models in several organs, but little is known about its effect on the liver. The aim of this study was to evaluate the beneficial effects of vitamin D in a model of liver I/R in rats, focusing on Toll-like receptor (TLR) 4 signaling, which has been shown to be involved in I/R injury. MATERIAL AND METHODS: Twenty-four male Wistar rats were randomized into four groups: Saline + Sham, Saline + I/R, Paricalcitol + Sham, and Paricalcitol + I/R...
March 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28260877/repression-of-toll-like-receptor-4-by-microrna-149-3p-is-associated-with-smoking-related-copd
#10
Wen Shen, Jia Liu, Guohou Zhao, Minjuan Fan, Gao Song, Yang Zhang, Zhiying Weng, You Zhang
BACKGROUND: Smoking is the leading cause of COPD. Exploring molecular markers and understanding the pathogenic mechanisms of smoking-related COPD are helpful for early clinical diagnosis and treatment of the disease. This study aims to identify specific circulating microRNAs (miRNAs) from the blood of COPD patients with a long history of smoking. METHODS: Blood samples from four different groups were collected, and miRNA microarray was performed. Differential expression of miRNAs was verified by quantitative polymerase chain reaction...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28258674/ibudilast-a-non%C3%A2-selective-phosphodiesterase-inhibitor-in-brain-disorders
#11
Joanna Schwenkgrub, Małgorzata Zaremba, Dagmara Mirowska-Guzel, Iwona Kurkowska-Jastrzębska
Ibudilast (IBD) is a non‑selective (3, 4, 10, 11) phosphodiesterase (PDE) inhibitor, used mainly as a bronchodilator for the treatment of bronchial asthma. PDE play a central role in cellular function (e.g. differentiation, synaptic plasticity and inflammatory response) by metabolizing cyclic nucleotides. The results from preclinical and clinical studies indicate that IBD has a broader range of action through suppression of pro‑inflammatory cytokines (IL‑6, IL‑1β, TNF‑α), toll‑like receptor 4 blockade (TLR‑4), inhibition of a macrophage migration inhibitory factor (MIF), up‑regulation the anti‑inflammatory cytokine (IL‑10), and promotion of neurotrophic factors (GDNF, NGF, NT‑4)...
March 2, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28252235/toll-like-receptor-induced-expression-of-epithelial-cytokine-receptors-on-hemopoietic-progenitors-is-altered-in-allergic-asthma
#12
Damian Tworek, Delia Heroux, Seamus N O'Byrne, Patrick Mitchell, Paul M O'Byrne, Judah A Denburg
BACKGROUND: Hemopoietic progenitor cells (HPC) migrate to sites of allergic inflammation where, upon stimulation with epithelial cytokines, they produce Th2 cytokines and differentiate into mature eosinophils and basophils. They also express Toll-like receptors (TLR) involved in anti-microbial responses. OBJECTIVE: The objective of this study was to compare TLR expression on peripheral blood HPC and TLR-induced responses, in particular changes in epithelial cytokine receptors, in healthy and asthmatic subjects at baseline and following allergen challenge...
March 1, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28246456/nutrigenomic-evaluation-of-garlic-allium-sativum-and-holy-basil-ocimum-sanctum-leaf-powder-supplementation-on-growth-performance-and-immune-characteristics-in-broilers
#13
N Sheoran, R Kumar, A Kumar, K Batra, S Sihag, S Maan, N S Maan
AIM: In this study, a planned research work was conducted to investigate the nutrigenomic aspects of supplementation of Allium sativum (garlic) and Ocimum sanctum (holy basil) leaf powder on the growth performance and immune characteristics of broilers. MATERIALS AND METHODS: A 6 weeks feeding trial was conducted with 280-day-old Ven Cobb broilers, distributed randomly into seven experimental groups. Each treatment had 4 replicates with 10 birds each. The birds of the control group (T1) were fed a basal diet formulated as per BIS standards...
January 2017: Veterinary World
https://www.readbyqxmd.com/read/28242239/role-of-toll-like-receptor-4-in-drug-drug-interaction-between-paclitaxel-and-irinotecan-in-vitro
#14
Pankajini Mallick, Sumit Basu, Bhagavtula Moorthy, Romi Ghose
The bacterial receptor, Toll-like receptor (TLR) 4 mediates inflammatory responses and has been linked to a broad array of diseases. TLR4 agonists are being explored as potential treatments for cancer and other diseases. We have previously shown that activation of TLR4 by lipopolysaccharide (LPS) leads to down-regulation of drug metabolizing enzymes/transporters (DMETs), and altered pharmacokinetics/pharmacodynamics (PK/PD) of drugs. These changes can increase the risk of drug-drug interactions (DDIs) in patients on multiple medications...
February 27, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
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
#15
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 24, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28238361/macrophage-regulation-of-b-cell-proliferation
#16
Naomi Goldman, Kornelija Valiuskyte, Jennifer Londregan, Adam Swider, John Somerville, James E Riggs
Unlike organized lymphoid tissue, the tumor microenvironment (TME) often includes a high proportion of immunosuppressive macrophages. We model the TME by culturing peritoneal cavity (PerC) cells that naturally have a high macrophage to lymphocyte ratio. Prior studies revealed that, following TCR ligation, PerC T cell proliferation is suppressed due to IFNγ-triggered inducible nitric oxide synthase expression. In this study we assessed the ability of PerC B cells to respond to surrogate activating signals in the presence of high numbers of macrophages...
February 21, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28224333/anti-neuroinflammatory-effects-of-grossamide-from-hemp-seed-via-suppression-of-tlr-4-mediated-nf-%C3%AE%C2%BAb-signaling-pathways-in-lipopolysaccharide-stimulated-bv2-microglia-cells
#17
Qian Luo, Xiaoli Yan, Larisa Bobrovskaya, Mei Ji, Huiqing Yuan, Hongxiang Lou, Peihong Fan
Grossamide, a representative lignanamide in hemp seed, has been reported to possess potential anti-inflammatory effects. However, the potential anti-neuroinflammatory effects and underlying mechanisms of action of grossamide are still unclear. Therefore, the present study investigated the possible effects and underlying mechanisms of grossamide against lipopolysaccharide (LPS)-induced inflammatory response in BV2 microglia cells. BV2 microglia cells were pre-treated with various concentrations of grossamide before being stimulated with LPS to induce inflammation...
February 21, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28223351/in-vivo-and-in-vitro-proteome-analysis-of-hiv-1-infected-human-cd4-t-cells
#18
Johannes Nemeth, Valentina Vongrad, Karin J Metzner, Victoria Strouvelle, Rainer Weber, Patrick Pedrioli, Ruedi Aebersold, Huldrych Guenthard, Ben C Collins
Host directed therapies against HIV-1 are thought to be critical for long term containment of the HIV-1 pandemic but remain elusive. Since HIV-1 infects and manipulates important effectors of both the innate and adaptive immune system, identifying modulations of the host cell systems in humans during HIV-1 infection may be crucial for the development of immune based therapies. Here, we quantified the changes of the proteome in human CD4+ T cells upon HIV-1 infection, both in vitro and in vivo. A SWATH-MS approach was used to measure the proteome of human primary CD4+ T cells infected with HIV-1 in vitro as well as CD4+ T cells from HIV-1 infected patients with paired samples on and off antiretroviral treatment...
February 21, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28222433/high-glucose-induces-mouse-mesangial-cell-overproliferation-via-inhibition-of-hydrogen-sulfide-synthesis-in-a-tlr-4-dependent-manner
#19
Tao Ding, Wei Chen, Juan Li, Jiarong Ding, Xiaobin Mei, Haiyan Hu
BACKGROUND/AIMS: Overproliferation of mesangial cells was believed to play an important role in the progress of diabetic nephropathy, one of the primary complications of diabetes. Hydrogen sulfide (H2S), a well-known and pungent gas with the distinctive smell of rotten eggs, was discovered to play a protective role in diabetic nephropathy. METHODS: MTT assay was used to examine the viability of mesangial cells. Small interfering RNA was used to knock down the expression of TLR4 while specific inhibitor LY294002 to suppress the function of PI3K...
February 22, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28221243/effects-of-glycyrrhizin-on-the-differentiation-of-myeloid-cells-of-the-heart-and-lungs-in-lipopolysaccharide-induced-septic-mice
#20
Eun-Hye Seo, Ga-Yun Song, Byung Ok Kwak, Chung-Sik Oh, Seung Hyun Lee, Seong-Hyop Kim
BACKGROUND: This study investigated the effects of glycyrrhizin (GR) on the ratio of myeloid-derived suppressor cells (MDSCs) to cluster of differentiation (CD)11b+Gr1 myeloid cells in the heart and lungs in lipopolysaccharide (LPS)-induced septic mice. METHODS: Mice were divided into three groups: Control, LPS, and LPS+GR. After intraperitoneal injection of phosphate-buffered saline for the Control group, LPS for the LPS group, and a combination of LPS and GR for the LPS+GR group, fluorescence-activated cell sorting was utilized to evaluate cytokines and immune cells in the blood, heart, and lungs...
February 17, 2017: Shock
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