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Monocyte pathogenesis

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https://www.readbyqxmd.com/read/28526535/tnf-%C3%AE-is-superior-to-conventional-inflammatory-mediators-in-forecasting-ivig-nonresponse-and-coronary-arteritis-in-chinese-children-with-kawasaki-disease
#1
Peng Hu, Guang Mei Jiang, Yue Wu, Bao Yu Huang, Si Yan Liu, Dong Dong Zhang, Yao Xu, Yang Fang Wu, Xun Xia, Wei Wei, Bo Hu
BACKGROUND: Tumor necrosis factor (TNF) -α is of inflammatory cytokines produced chiefly by activated monocyte/macrophages, and has been implicated in the pathogenesis of Kawasaki disease (KD). We elucidated the relationship of plasma TNF-α with conventional inflammatory mediators, clinical classification, intravenous immunoglobulin (IVIG) response and coronary arteritis in the course of KD. METHODS: Seventy Chinese children with KD were enrolled and divided into 6 subgroups, including complete KD, incomplete KD, IVIG-responsive KD, IVIG-nonresponsive KD, coronary artery (CA) -noninvolvement KD and CA-involvement KD...
May 16, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28524179/a-fkbp5-mutation-is-associated-with-paget-s-disease-of-bone-and-enhances-osteoclastogenesis
#2
Bingru Lu, Yulian Jiao, Yinchang Wang, Jing Dong, Muyun Wei, Bin Cui, Yafang Sun, Laicheng Wang, Bingchang Zhang, Zijiang Chen, Yueran Zhao
Paget's disease of bone (PDB) is a common metabolic bone disease that is characterized by aberrant focal bone remodeling, which is caused by excessive osteoclastic bone resorption followed by disorganized osteoblastic bone formation. Genetic factors are a critical determinant of PDB pathogenesis, and several susceptibility genes and loci have been reported, including SQSTM1, TNFSF11A, TNFRSF11B, VCP, OPTN, CSF1 and DCSTAMP. Herein, we report a case of Chinese familial PDB without mutations in known genes and identify a novel c...
May 19, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28511292/gut-inflammation-in-hla-b27-transgenic-rats-alters-the-monocyte-compartment-and-its-osteoclastogenic-potential
#3
Cecilia Ansalone, Lotta Utriainen, Simon Milling, Carl S Goodyear
Objective To investigate the relationship between intestinal inflammation and the central and peripheral innate immune system, in the pathogenesis of HLA-B27 associated spondyloarthritis. Methods The myeloid compartment of the bone marrow and blood of HLA-B27 transgenic (B27), control HLA-B7 transgenic (B7), and non-transgenic rats were evaluated by flow cytometry. Plasma from rats were assessed by ELISA for CCL2 and IL-1α levels. Rats were treated for 4 weeks with antibiotics and the blood and bone marrow myeloid compartments were evaluated by flow cytometry...
May 16, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28508153/cellular-and-molecular-perspectives-in-rheumatoid-arthritis
#4
REVIEW
Douglas J Veale, Carl Orr, Ursula Fearon
Synovial immunopathology in rheumatoid arthritis is complex involving both resident and infiltrating cells. The synovial tissue undergoes significant neovascularization, facilitating an influx of lymphocytes and monocytes that transform a typically acellular loose areolar membrane into an invasive tumour-like pannus. The microvasculature proliferates to form straight regularly-branching vessels; however, they are highly dysfunctional resulting in reduced oxygen supply and a hypoxic microenvironment. Autoantibodies such as rheumatoid factor and anti-citrullinated protein antibodies are found at an early stage, often before arthritis has developed, and they have been implicated in the pathogenesis of RA...
May 15, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/28506308/attenuating-immune-pathology-using-a-microbial-based-intervention-in-a-mouse-model-of-cigarette-smoke-induced-lung-inflammation
#5
Mark Bazett, Agnieszka Biala, Ryan D Huff, Matthew R Zeglinksi, Philip M Hansbro, Momir Bosiljcic, Hal Gunn, Shirin Kalyan, Jeremy A Hirota
BACKGROUND: Cigarette smoke exposure is the major risk factor for developing COPD. Presently, available COPD treatments focus on suppressing inflammation and providing bronchodilation. However, these options have varying efficacy in controlling symptoms and do not reverse or limit the progression of COPD. Treatments strategies using bacterial-derived products have shown promise in diseases characterized by inflammation and immune dysfunction. This study investigated for the first time whether a novel immunotherapy produced from inactivated Klebsiella (hereafter referred to as KB) containing all the major Klebsiella macromolecules, could attenuate cigarette smoke exposure-induced immune responses...
May 15, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28502130/diagnostic-and-prognostic-values-of-monocyte-chemotactic-protein-1-in-ascitic-fluid-of-patients-with-spontaneous-bacterial-peritonitis
#6
Naglaa El-Toukhy, Sherin M Emam
Spontaneous bacterial peritonitis (SBP) is a severe complication in cirrhotics with ascites. Monocyte chemotactic protien-1 (MCP-1) is a chemotactic factor for monocytes/macrophages, and it activates lymphocytes and neutrophils during infection. This study aimed to evaluate the role of MPC-1 in the pathogenesis of SBP and assess its prognostic value and correlation to disease severity. The study included ninety patients with liver cirrhosis and ascites. Patients were divided into 2 groups: Group I including 45 ascetic patients with SBP (polymorph nuclear cell count (PMN) >= 250 cell/mm3 in ascitic fluid), and Group II including 45 ascetic patients without SBP...
June 2016: Egyptian Journal of Immunology
https://www.readbyqxmd.com/read/28499612/environmentally-relevant-dose-of-arsenic-interferes-in-functions-of-human-monocytes-derived-dendritic-cells
#7
Abbas Bahari, Vahid Salmani
Arsenic is a major environmental pollutant and highly hazardous toxin to human health, which well established as carcinogen and immune deregulatory properties. Dendritic cells (DCs) have a pivotal role in cell-mediated immunity for T-cell activation and antigen presentation. In this study, T cell activation, some key functional genes expression, cell stability and phagocytosis capacity of human monocytes derived DCs (MDDCs) were analyzed after in vitro exposure to very low dose of arsenic for 12 and 24h. Arsenic decreased continually phagocytosis capacity of MDDCs...
May 10, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28497987/elevated-activating-transcription-factor-4-and-glucose-regulated-78-kda-protein-levels-correlate-with-inflammatory-cytokines-in-the-aqueous-humor-and-vitreous-of-proliferative-diabetic-retinopathy
#8
Yanuo Wang, Sha Gao, Yanji Zhu, Xi Shen
PURPOSE: To determine concentrations of endoplasmic reticulum (ER) stress-related factors activating transcription factor 4 (ATF4) and glucose-regulated 78 kDa protein (GRP78) in vitreous and aqueous humor (AqH) of patients with proliferative diabetic retinopathy (PDR) and the correlation of ATF4, GRP78 and inflammatory cytokines interleukin-6(IL-6) and monocyte chemoattractant protein-1 (MCP-1). MATERIALS AND METHODS: AqH and vitreous samples were collected from eyes of patients with PDR and idiopathic macular hole (IMH) which needed vitrectomy...
May 12, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28493507/pkc-erk-p38-map-kinases-and-nf-%C3%AE%C2%BAb-targeted-signalling-play-a-role-in-the-expression-and-release-of-il-1%C3%AE-and-cxcl8-in-porphyromonas-gingivalis-infected-thp1-cells
#9
Kartheyaene Jayaprakash, Isak Demirel, Sezin Gunaltay, Hazem Khalaf, Torbjörn Bengtsson
Porphyromonas gingivalis is a keystone pathogen in periodontitis and is gaining importance in cardiovascular pathogenesis. Protease-activated receptors (PARs), toll-like receptors (TLRs) and nucleotide-binding oligomerization domain (NOD) on monocytes recognize the structural components on P. gingivalis, inducing inflammatory intermediates. Here, we elucidate the modulation of PARs, TLRs, NODs, and the role of MAPK and NF-κB in IL-1β and CXCL8 release. THP1 cells were stimulated with P. gingivalis wild-type W50 and its isogenic gingipain mutants: Rgp mutant E8 and Kgp mutant K1A...
May 11, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28492701/short-term-intensive-training-attenuates-the-exercise-induced-interaction-of-mono-1-2-cells-and-platelets-after-coronary-bypass-in-cardiac-patients
#10
Shu-Chun Huang, Mei-Kuen Wong, Pyng-Jing Lin, Feng-Chun Tsai, Jaw-Ji Chu, Meng-Yu Wu, Tieh-Cheng Fu, Jong-Shyan Wang
The interaction between platelets and monocytes plays a critical role in the pathogenesis and progression of cardiovascular diseases. This study investigated how short-term intensive training (SIT) influences monocyte subset characteristics and exercise-induced monocyte and platelet aggregates (MPAs) following elective coronary bypass (CABG) in cardiac patients. Forty-nine patients hospitalised for CABG were randomised into SIT (N=26) and conventional training (CT, N=23) groups. The SIT subjects underwent supervised aerobic training at 80~120 % of the ventilatory anaerobic threshold based on sub-maximal exercise tests performed 7 days post-CABG for 20 sessions with two sessions/day and 30 min/session, which were completed within four weeks after surgery...
May 11, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28487990/inhibition-of-btk-protects-lungs-from-trauma-hemorrhagic-shock-induced-injury-in-rats
#11
Xinwei Liu, Jingdong Zhang, Wenfeng Han, Yu Wang, Yunen Liu, Yubiao Zhang, Dapeng Zhou, Liangbi Xiang
The present study aimed to investigate the role of Bruton's tyrosine kinase (BTK) in the pathogenesis of lung injury induced by trauma‑hemorrhagic shock (THS), and to examine the pulmonary protective effects of BTK inhibition. Male Sprague‑Dawley rats were divided into four groups (n=12/group): i) A Sham group, which received surgery without induced trauma; ii) a THS‑induced injury group; iii) a THS‑induced injury group that also received treatment with the BTK inhibitor LFM‑A13 prior to trauma induction; and iv) a Sham group that was pretreated with LFM‑A13 prior to surgery but did not receive induced trauma...
May 9, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28487436/protective-effect-of-let-7-mirna-family-in-regulating-inflammation-in-diabetes-associated-atherosclerosis
#12
Eoin Brennan, Bo Wang, Aaron McClelland, Muthukumar Mohan, Mariam Marai, Ophelie Beuscart, Sinda Derouiche, Stephen Gray, Raelene Pickering, Chris Tikellis, Monica de Gaetano, Mary Barry, Orina Belton, Syed Tasadaque Ali-Shah, Patrick Guiry, Karin Am Jandeleit-Dahm, Mark E Cooper, Catherine Godson, Phillip Kantharidis
The let-7 miRNA family play a key role in modulating inflammatory responses. Vascular smooth muscle cell (SMC) proliferation, and endothelial cell (EC) dysfunction are critical in the pathogenesis of atherosclerosis, including in the setting of diabetes. Here we report that let-7 levels are decreased in diabetic human carotid plaques and in a model of diabetes-associated atherosclerosis (DAA), the diabetic ApoE(-/-) mouse. In vitro, platelet-derived growth factor (PDGF) and tumor necrosis factor-alpha (TNF-α) induced vascular SMC and EC activation was associated with reduced let-7 miRNA expression, via Lin28b, a negative regulator of let-7 biogenesis...
May 9, 2017: Diabetes
https://www.readbyqxmd.com/read/28487203/mmps-timps-imbalances-in-the-peripheral-blood-and-cerebrospinal-fluid-are-associated-with-the-pathogenesis-of-hiv-1-associated-neurocognitive-disorders-a-pilot-study
#13
Yanyan Xing, Nicole Shepherd, Jie Lan, Wei Li, Sushmita Rane, Samir K Gupta, Shanxiang Zhang, Jun Dong, Qigui Yu
HIV-1-associated neurocognitive disorders (HAND) continue to be a major concern in the infected population, despite the widespread use of combined antiretroviral therapy (cART). Growing evidence suggests that an imbalance between matrix metalloproteinases (MMPs) and endogenous tissue inhibitors of MMPs (TIMPs) contributes to the pathogenesis of HAND. In our present study, we examined protein levels and enzymatic activities of MMPs and TIMPs in both plasma and cerebrospinal fluid (CSF) samples from HIV-1 patients with or without HAND and HIV-1-negative controls...
May 6, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28484686/impact-of-pe_pgrs33-gene-polymorphisms-on-mycobacterium-tuberculosis-infection-and-pathogenesis
#14
Serena Camassa, Ivana Palucci, Raffaella Iantomasi, Tiziana Cubeddu, Mariachiara Minerva, Flavio De Maio, Samuel Jouny, Elisa Petruccioli, Delia Goletti, Francesco Ria, Michela Sali, Maurizio Sanguinetti, Riccardo Manganelli, Stefano Rocca, Priscille Brodin, Giovanni Delogu
PE_PGRS33 is a surface-exposed protein of Mycobacterium tuberculosis (Mtb) which exerts its role in macrophages entry and immunomodulation. In this study, we aimed to investigate the polymorphisms in the pe_pgrs33 gene of Mtb clinical isolates and evaluate their impact on protein functions. We sequenced pe_pgrs33 in a collection of 135 clinical strains, genotyped by 15-loci MIRU-VNTR and spoligotyping and belonging to the Mtb complex (MTBC). Overall, an association between pe_pgrs33 alleles and MTBC genotypes was observed and a dN/dS ratio of 0...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28478837/the-spread-of-ebv-to-ectopic-lymphoid-aggregates-may-be-the-final-common-pathway-in-the-pathogenesis-of-me-cfs
#15
Willy Eriksen
According to the hypothesis presented here, myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) develops over 3 steps: Step 1 is characterized by the aggregation of lymphoid cells in dorsal root ganglia or other nervous structures. The cause of this formation of ectopic lymphoid aggregates may be an acute infection, asymptomatic reactivations of a common neurotropic virus, exposure to a neurotoxin, or physical injury to peripheral nerves. In step 2, Epstein-Barr virus (EBV)-infected lymphocytes or monocytes bring EBV from the circulation to one or several of these lymphoid aggregates, whereupon cell-to-cell transmission of EBV and proliferation of latently EBV-infected lymphocytes lead to the presence of many EBV-infected cells in the lymphoid aggregates...
May 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28476750/programming-and-memory-dynamics-of-innate-leukocytes-during-tissue-homeostasis-and-inflammation
#16
REVIEW
Christina Lee, Shuo Geng, Yao Zhang, Allison Rahtes, Liwu Li
The field of innate immunity is witnessing a paradigm shift regarding "memory" and "programming" dynamics. Past studies of innate leukocytes characterized them as first responders to danger signals with no memory. However, recent findings suggest that innate leukocytes, such as monocytes and neutrophils, are capable of "memorizing" not only the chemical nature but also the history and dosages of external stimulants. As a consequence, innate leukocytes can be dynamically programmed or reprogrammed into complex inflammatory memory states...
May 5, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28475147/folic-acid-supplementation-delays-atherosclerotic-lesion-development-by-modulating-mcp1-and-vegf-dna-methylation-levels-in-vivo-and-in-vitro
#17
Shanshan Cui, Wen Li, Xin Lv, Pengyan Wang, Yuxia Gao, Guowei Huang
The pathogenesis of atherosclerosis has been partly acknowledged to result from aberrant epigenetic mechanisms. Accordingly, low folate levels are considered to be a contributing factor to promoting vascular disease because of deregulation of DNA methylation. We hypothesized that increasing the levels of folic acid may act via an epigenetic gene silencing mechanism to ameliorate atherosclerosis. Here, we investigated the atheroprotective effects of folic acid and the resultant methylation status in high-fat diet-fed ApoE knockout mice and in oxidized low-density lipoprotein-treated human umbilical vein endothelial cells...
May 5, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28472164/association-study-of-mcp-1-promoter-polymorphisms-with-the-susceptibility-and-progression-of-sepsis
#18
Junbing He, Yuhua Chen, Yao Lin, Wenying Zhang, Yujie Cai, Feng Chen, Qinghui Liao, Zihan Yin, Yan Wang, Shoubao Tao, Xiaoli Lin, Pengru Huang, Lili Cui, Yiming Shao
Previous studies have indicated that the monocyte chemo-attractant protein 1 (MCP-1), also referred to as C-C motif chemokine ligand 2 (CCL2), plays a significant role in the pathogenesis of sepsis, and this study investigated the clinical relevance of two MCP-1 gene polymorphisms on sepsis onset and progression. The Multiplex SNaPshot genotyping method was used to detect MCP-1 gene polymorphisms in the Chinese Han population (403 sepsis patients and 400 controls). MCP-1 mRNA expression levels were measured using real-time quantitative PCR, and enzyme-linked immunosorbent assays were used to analyze MCP-1, tumor necrosis factor-alpha (TNF-α), interleukin 6 (IL-6) and interleukin-1 beta (IL-1β) plasma concentrations...
2017: PloS One
https://www.readbyqxmd.com/read/28468882/serum-metabolomics-investigation-of-humanized-mouse-model-with-dengue-infection
#19
Liang Cui, Jue Hou, Jinling Fang, Yie Hou Lee, Vivian Vasconcelos Costa, Lan Hiong Wong, Qingfeng Chen, Eng Eong Ooi, Steven R Tannenbaum, Jianzhu Chen, Choon Nam Ong
Dengue is an acute febrile illness caused by dengue virus (DENV) and a major cause of morbidity and mortality in tropical and subtropical regions of the world. The lack of an appropriate small-animal model of dengue infection has greatly hindered the study of dengue pathogenesis and the development of therapeutics. In this study, we conducted a mass spectrometry-based serum metabolic profiling from a humanized mice (humice) model with DENV serotype 2 infection at 0, 3, 7, 14 and 28 days post infection (dpi)...
May 3, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28466476/numerical-and-functional-defects-in-cd8-cd28-t-suppressor-lymphocytes-from-patients-with-primary-immune-thrombocytopenia
#20
Huiyuan Li, Yating Hao, Donglei Zhang, Wenjie Liu, Yang Li, Mingen Lyu, Rongfeng Fu, Feng Xue, Xiaofan Liu, Renchi Yang
Primary immune thrombocytopenia (ITP) is an acquired autoimmune disorder, and loss of immune tolerance has been implicated in ITP pathogenesis. CD8(+) CD28(-) suppressor (Ts) cells have an immunosuppression function and are involved in several autoimmune disorders. However, the role of Ts cells in ITP is currently not clear. Here, flow cytometry was used to detect the CD8(+) CD28(-) CD127(-) proportion, which was decreased in active ITP patients compared with that of controls. Function analysis showed that immunosuppression of CD8(+) CD28(-) Ts cells in ITP patients was impaired...
May 3, 2017: British Journal of Haematology
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