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https://www.readbyqxmd.com/read/29772244/gender-difference-in-the-effect-of-progesterone-on-neonatal-hypoxic-ischemic-brain-injury-in-mouse
#1
Shuyu Dong, Qian Zhang, Delian Kong, Chao Zhou, Jie Zhou, Jingjing Han, Yan Zhou, Guoliang Jin, Xiaodong Hua, Jun Wang, Fang Hua
This study was to investigate the effects of progesterone (PROG) on neonatal hypoxic/ischemic (NHI) brain injury, the differences in effects between genders, and the underlying mechanisms. NHI brain injury was established in both male and female neonatal mice induced by occlusion of the left common carotid artery followed by hypoxia. The mice were treated with PROG or vehicle. Fluoro-Jade B staining (F-JB), long term behavior testing, and brain magnetic resonance image (MRI) were applied to evaluate neuronal death, neurological function, and brain damage...
May 14, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29768622/single-nucleotide-polymorphisms-of-cytokine-related-genes-and-association-with-clinical-outcome-in-a-chagas-disease-case-control-study-from-brazil
#2
Lucia Elena Alvarado-Arnez, Angelica Martins Batista, Silvia Marinho Alves, Gloria Melo, Virgínia Maria Barros de Lorena, Cynthia C Cardoso, Isabela Resende Pereira, Cristina Carrazzone, Antonio G Pacheco, Wilson Oliveira, Milton Ozório Moraes, Joseli Lannes-Vieira
BACKGROUND: The severity of chronic chagasic cardiomyopathy (CCC), the most frequent clinical outcome of Chagas disease (CD), has been associated with cytokine-enriched heart tissue inflammation, and high serum levels of transforming growth factor (TGFβ), interferon-gamma (IFNγ), and tumour necrosis factor (TNF). Conversely, increased interleukin (IL)-10 serum concentrations have been associated with asymptomatic CD. Cytokines and cytokine-related gene polymorphisms may control cytokine expression and have been proposed to contribute to CCC outcomes...
May 14, 2018: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/29760711/selective-modulation-of-tnf-tnfrs-signaling-insights-for-multiple-sclerosis-treatment
#3
REVIEW
Valentina Pegoretti, Wia Baron, Jon D Laman, Ulrich L M Eisel
Autoimmunity develops when self-tolerance mechanisms are failing to protect healthy tissue. A sustained reaction to self is generated, which includes the generation of effector cells and molecules that destroy tissues. A way to restore this intrinsic tolerance is through immune modulation that aims at refurbishing this immunologically naïve or unresponsive state, thereby decreasing the aberrant immune reaction taking place. One major cytokine has been shown to play a pivotal role in several autoimmune diseases such as rheumatoid arthritis (RA) and multiple sclerosis (MS): tumor necrosis factor alpha (TNFα) modulates the induction and maintenance of an inflammatory process and it comes in two variants, soluble TNF (solTNF) and transmembrane bound TNF (tmTNF)...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29749496/increased-expression-of-microrna-338-3p-contributes-to-production-of-dsg3-antibody-in-pemphigus-vulgaris-patients
#4
Qingxiu Liu, Feiyi Cui, Menglei Wang, Hao Xiong, Xiaoming Peng, Liuping Liang, Li Li, Jing Zhang, Xuebiao Peng, Kang Zeng
Expression of microRNA-338-3p (miR-338-3p) was aberrantly elevated in pemphigus vulgaris (PV), although its role in PV is still unknown. The present study investigated the functional role and possible molecular mechanisms of miR-338-3p in PV. Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) was performed to detect miR-338-3p expression in peripheral blood mononuclear cells (PBMCs) from patients with PV. Correlation with disease severity and anti-desmoglein 3 antibody (anti-Dsg3) titers were analyzed in patients with PV...
April 26, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29749399/autocrine-tnf-signaling-favors-malignant-cells-in-myelofibrosis-in-a-tnfr2-dependent-fashion
#5
William L Heaton, Anna V Senina, Anthony D Pomicter, Mohamed E Salama, Phillip M Clair, Dongqing Yan, Russell N Bell, Jeremy M Gililland, Josef T Prchal, Thomas O'Hare, Michael W Deininger
Tumor necrosis factor alpha (TNF) is increased in myelofibrosis (MF) and promotes survival of malignant over normal cells. The mechanisms altering TNF responsiveness in MF cells are unknown. We show that the proportion of marrow (BM) cells expressing TNF is increased in MF compared to controls, with the largest differential in primitive cells. Blockade of TNF receptor 2 (TNFR2), but not TNFR1, selectively inhibited colony formation by MF CD34+ and mouse JAK2V617F progenitor cells. Microarray of mouse MPN revealed reduced expression of X-linked inhibitor of apoptosis (Xiap) and mitogen-activated protein kinase 8 (Mapk8) in JAK2V617F relative to JAK2WT cells, which were normalized by TNFR2 but not TNFR1 blockade...
April 18, 2018: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/29740434/lack-of-evidence-for-a-direct-interaction-of-progranulin-and-tumor-necrosis-factor-receptor-1-and-tumor-necrosis-factor-receptor-2-from-cellular-binding-studies
#6
Isabell Lang, Simone Füllsack, Harald Wajant
Progranulin (PGRN) is a secreted anti-inflammatory protein which can be processed by neutrophil proteases to various granulins. It has been reported that at least a significant portion of the anti-inflammatory effects of PGRN is due to direct high affinity binding to tumor necrosis factor receptor-1 (TNFR1) and TNFR2 and inhibition of tumor necrosis factor (TNF)-induced TNFR1/2 signaling. Two studies failed to reproduce the interaction of TNFR1 and TNFR2 with PGRN, but follow up reports speculated that this was due to varying experimental circumstances and/or the use of PGRN from different sources...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29738072/combined-inflammation-and-metabolism-biomarker-indices-of-robust-and-impaired-physical-function-in-older-adults
#7
Xintong Zuo, Alison Luciano, Carl F Pieper, James R Bain, Virginia B Kraus, William E Kraus, Miriam C Morey, Harvey J Cohen
OBJECTIVES: To determine whether combinations of inflammatory markers are related to physical function. DESIGN AND SUBJECTS: secondary analysis of baseline of three observational studies of community-dwelling older adults MEASUREMENTS: The baseline data from 3 cohorts of older adults with different health and disease status were employed. Twenty markers of inflammation and metabolism were individually assessed for correlation with usual gait speed and were separated into robust and impairment quartiles...
May 8, 2018: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29725328/role-of-tnf-tnf-receptor-2-signal-in-regulatory-t-cells-and-its-therapeutic-implications
#8
REVIEW
Sujuan Yang, Julie Wang, David Douglass Brand, Song Guo Zheng
Tumor necrosis factor α (TNFα) is a pleiotropic cytokine which signals through TNF receptor 1 (TNFR1) and TNF receptor 2 (TNFR2). Emerging evidence has demonstrated that TNFR1 is ubiquitously expressed on almost all cells, while TNFR2 exhibits a limited expression, predominantly on regulatory T cells (Tregs). In addition, the signaling pathway by sTNF via TNFR1 mainly triggers pro-inflammatory pathways, and mTNF binding to TNFR2 usually initiates immune modulation and tissue regeneration. TNFα plays a critical role in upregulation or downregulation of Treg activity...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29723540/tnf%C3%AE-dependent-anhedonia-and-upregulation-of-hippocampal-serotonin-transporter-activity-in-a-mouse-model-of-collagen-induced-arthritis
#9
Eric Brown, Conor J Mc Veigh, Leilani Santos, Martina Gogarty, Heidi Kaastrup Müller, Betina Elfving, David J Brayden, Jana Haase
The serotonin transporter (SERT) facilitates high affinity reuptake of 5-HT from the extracellular fluid and dysregulation of transporter function has been implicated in a range of mood disorders including depression. Recent studies have linked immune system activation to depression as well as to altered serotonin transporter activity. Advancing previous studies, which have mainly focussed on acute effects of immune system activation, in this study we used collagen-induced arthritis (CIA) in mice as a model of chronic inflammatory disease, to investigate the effect of prolonged inflammation on brain SERT function and behaviour...
April 30, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29719531/characterization-of-chicken-tumor-necrosis-factor-%C3%AE-a-long-missed-cytokine-in-birds
#10
Franziska Rohde, Benjamin Schusser, Tomáš Hron, Helena Farkašová, Jiří Plachý, Sonja Härtle, Jiří Hejnar, Daniel Elleder, Bernd Kaspers
Tumor necrosis factor-α (TNF-α) is a pleiotropic cytokine playing critical roles in host defense and acute and chronic inflammation. It has been described in fish, amphibians, and mammals but was considered to be absent in the avian genomes. Here, we report on the identification and functional characterization of the avian ortholog. The chicken TNF-α (chTNF-α) is encoded by a highly GC-rich gene, whose product shares with its mammalian counterpart 45% homology in the extracellular part displaying the characteristic TNF homology domain...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29698572/attenuated-salmonella-vnp20009-mutant-%C3%AE-htra-is-a-promising-candidate-for-bacteria-mediated-tumor-therapy-in-hosts-with-tnfr1-deficiency
#11
Wenling Xu, Taoran Zhou, Junjie Zhou, Zeping Qiang, Jing Zhang, Zi-Chun Hua
VNP20009 is a genetically modified strain of Salmonella typhimurium and has a good anti-cancer effect wildly used in tumor therapy on animal models. For its clinical application, an accurate bio-safety assessment on sensitive models is necessary. In this study, we use TNFR1 KO mice as a susceptive model to assess the virulence of bacterial VNP20009 and its derivative ΔhtrA. By intraperitoneal administration of Salmonella, the increased lethality was observed in TNFR1 KO mice infected with VNP20009, but not with ΔhtrA...
April 26, 2018: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29695863/lubac-is-essential-for-embryogenesis-by-preventing-cell-death-and-enabling-haematopoiesis
#12
Nieves Peltzer, Maurice Darding, Antonella Montinaro, Peter Draber, Helena Draberova, Sebastian Kupka, Eva Rieser, Amanda Fisher, Ciaran Hutchinson, Lucia Taraborrelli, Torsten Hartwig, Elodie Lafont, Tobias L Haas, Yutaka Shimizu, Charlotta Böiers, Aida Sarr, James Rickard, Silvia Alvarez-Diaz, Michael T Ashworth, Allison Beal, Tariq Enver, John Bertin, William Kaiser, Andreas Strasser, John Silke, Philippe Bouillet, Henning Walczak
The linear ubiquitin chain assembly complex (LUBAC) is required for optimal gene activation and prevention of cell death upon activation of immune receptors, including TNFR1 1 . Deficiency in the LUBAC components SHARPIN or HOIP in mice results in severe inflammation in adulthood or embryonic lethality, respectively, owing to deregulation of TNFR1-mediated cell death2-8 . In humans, deficiency in the third LUBAC component HOIL-1 causes autoimmunity and inflammatory disease, similar to HOIP deficiency, whereas HOIL-1 deficiency in mice was reported to cause no overt phenotype9-11 ...
May 2018: Nature
https://www.readbyqxmd.com/read/29686027/10-year-associations-between-tumor-necrosis-factor-receptors-1-and-2-and-cardiovascular-events-in-patients-with-stable-coronary-heart-disease-a-claricor-effect-of-clarithromycin-on-mortality-and-morbidity-in-patients-with-ischemic-heart-disease-trial-substudy
#13
Axel C Carlsson, Toralph Ruge, Erik Kjøller, Jørgen Hilden, Hans Jørn Kolmos, Ahmad Sajadieh, Jens Kastrup, Gorm Boje Jensen, Anders Larsson, Christoph Nowak, Janus Christian Jakobsen, Per Winkel, Christian Gluud, Johan Ärnlöv
BACKGROUND: We aimed to assess the associations and predictive powers between the soluble receptors for tumor necrosis factor (TNF)-α (TNFR1 and TNFR2) and cardiovascular outcomes in patients with stable coronary heart disease. METHODS AND RESULTS: CLARICOR (Effect of Clarithromycin on Mortality and Morbidity in Patients With Ischemic Heart Disease) is a randomized clinical trial comparing clarithromycin with placebo in patients with stable coronary heart disease...
April 23, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29685497/plasma-biomarkers-are-associated-with-renal-outcomes-in-individuals-with-apol1-risk-variants
#14
Girish N Nadkarni, Kinsuk Chauhan, Divya A Verghese, Chirag R Parikh, Ron Do, Carol R Horowitz, Erwin P Bottinger, Steven G Coca
G1/G2 variants in the Apolipoprotein L1 (APOL1) gene are associated with end-stage renal disease (ESRD) in people with African ancestry. Plasma biomarkers may have utility for risk stratification in APOL1 high-risk individuals of African ancestry. To evaluate this, we measured tumor necrosis factor receptor 1/2 (TNFR1/2) and kidney injury molecule-1 (KIM1) in baseline plasma specimens from individuals of African ancestry with high-risk APOL1 genotype. Biomarker association with a composite renal outcome of ESRD or 40% sustained decline in estimated glomerular filtration rate (eGFR) was then determined and then assessed as improvement in area under curve...
April 20, 2018: Kidney International
https://www.readbyqxmd.com/read/29684027/chronic-calcitriol-supplementation-improves-the-inflammatory-profiles-of-circulating-monocytes-and-the-associated-intestinal-adipose-tissue-alteration-in-a-diet-induced-steatohepatitis-rat-model
#15
Yen-Bo Su, Tzu-Hao Li, Chia-Chang Huang, Hung-Cheng Tsai, Shiang-Fen Huang, Yun-Cheng Hsieh, Ying-Ying Yang, Yi-Hsiang Huang, Ming-Chih Hou, Han-Chieh Lin
Vitamin D deficiency and up-regulated TNFα-related signals are reported to be involved in abnormalities including intestinal hyper-permeability, bacterial translocation, systemic/portal endotoxemia, intestinal/adipose tissue/hepatic inflammation, and hepatic steatosis in nonalcoholic steatohepatitis (NASH). This study aims to explore the molecular mechanisms and effects of chronic calcitriol [1,25-(OH)2D3, hormonal form of vitamin D] on gut-adipose tissue-liver axis abnormalities using a high-fat diet (HFD)-fed rat model of NASH...
2018: PloS One
https://www.readbyqxmd.com/read/29669778/factor-viia-induces-anti-inflammatory-signaling-via-epcr-and-par1
#16
Vijay Kondreddy, Jue Wang, Shiva Keshava, Charles T Esmon, L Vijaya Mohan Rao, Usha R Pendurthi
Recent studies show that endothelial cell protein C receptor (EPCR) interacts with diverse ligands, in addition to its known ligands protein C and activated protein C (APC). We showed in earlier studies that procoagulant clotting factor VIIa (FVIIa) binds EPCR and down-regulates EPCR-mediated anticoagulation and induces endothelial barrier protective effect. Here, we investigated the effect of FVIIa interaction with EPCR on endothelial cell inflammation and LPS-induced inflammatory responses in vivo. Treatment of endothelial cells with FVIIa suppressed TNFα- and LPS-induced expression of cellular adhesion molecules and adherence of monocytes to endothelial cells...
April 18, 2018: Blood
https://www.readbyqxmd.com/read/29661823/cutting-edge-blockade-of-inhibitor-of-apoptosis-proteins-sensitizes-neutrophils-to-tnf-but-not-lipopolysaccharide-mediated-cell-death-and-il-1%C3%AE-secretion
#17
Kaiwen W Chen, Kate E Lawlor, Jessica B von Pein, Dave Boucher, Motti Gerlic, Ben A Croker, Jelena S Bezbradica, James E Vince, Kate Schroder
The mammalian inhibitor of apoptosis proteins (IAPs) are key regulators of cell death and inflammation. A major function of IAPs is to block the formation of a cell death-inducing complex, termed the ripoptosome, which can trigger caspase-8-dependent apoptosis or caspase-independent necroptosis. Recent studies report that upon TLR4 or TNF receptor 1 (TNFR1) signaling in macrophages, the ripoptosome can also induce NLRP3 inflammasome formation and IL-1β maturation. Whether neutrophils have the capacity to assemble a ripoptosome to induce cell death and inflammasome activation during TLR4 and TNFR1 signaling is unclear...
April 16, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29623079/the-significance-of-tumor-necrosis-factor-receptor-type-ii-in-cd8-regulatory-t-cells-and-cd8-effector-t-cells
#18
REVIEW
Lin-Lin Ye, Xiao-Shan Wei, Min Zhang, Yi-Ran Niu, Qiong Zhou
Tumor necrosis factor (TNF) is a pleiotropic cytokine that has both pro-inflammatory and anti-inflammatory functions. The biological functions of TNF are mediated by two receptors, TNF receptor type I (TNFR1) and TNF receptor type II (TNFR2). TNFR1 is expressed universally on almost all cell types and has been extensively studied, whereas TNFR2 is mainly restricted to immune cells and some tumor cells and its role is far from clarified. Studies have shown that TNFR2 mediates the stimulatory activity of TNF on CD4+ Foxp3+ regulatory T cells (Tregs) and CD8+ Foxp3+ Tregs, and is involved in the phenotypic stability, proliferation, activation, and suppressive activity of Tregs...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29621671/microcystin-leucine-arginine-mediates-apoptosis-and-engulfment-of-leydig-cell-by-testicular-macrophages-resulting-in-reduced-serum-testosterone-levels
#19
Yabing Chen, Jing Wang, Xiang Chen, Dongmei Li, Xiaodong Han
Microcystin-leucine arginine (MC-LR) causes decline of serum testosterone levels resulting in impaired spermatogenesis; however, the underlying molecular mechanisms are not fully understood. In this study, we aimed to investigate the effects of MC-LR exposure on the number of Leydig cells (LCs) in testis. Following chronic low dose exposure to MC-LR, the number of LCs was markedly decreased while macrophages were significantly increased. Then, we established a co-culture system to study the interaction between macrophages and LCs in the presence of MC-LR...
March 17, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29618659/mesenchymal-tnfr2-promotes-the-development-of-polyarthritis-and-comorbid-heart-valve-stenosis
#20
Maria Sakkou, Panagiotis Chouvardas, Lydia Ntari, Alejandro Prados, Kristin Moreth, Helmut Fuchs, Valerie Gailus-Durner, Martin Hrabe de Angelis, Maria C Denis, Niki Karagianni, George Kollias
Mesenchymal TNF signaling is etiopathogenic for inflammatory diseases such as rheumatoid arthritis and spondyloarthritis (SpA). The role of Tnfr1 in arthritis has been documented; however, Tnfr2 functions are unknown. Here, we investigate the mesenchymal-specific role of Tnfr2 in the TnfΔARE mouse model of SpA in arthritis and heart valve stenosis comorbidity by cell-specific, Col6a1-cre-driven gene targeting. We find that TNF/Tnfr2 signaling in resident synovial fibroblasts (SFs) and valvular interstitial cells (VICs) is detrimental for both pathologies, pointing to common cellular mechanisms...
April 5, 2018: JCI Insight
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