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Monocyte pathogenesis

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https://www.readbyqxmd.com/read/29329815/exploring-molecular-insights-into-the-interaction-mechanism-of-cholesterol-derivatives-with-the-mce4a-a-combined-spectroscopic-and-molecular-dynamic-simulation-studies
#1
Shagufta Khan, Faez Iqbal Khan, Taj Mohammad, Parvez Khan, Gulam Mustafa Hasan, Kevin A Lobb, Asimul Islam, Faizan Ahmad, Md Imtaiyaz Hassan
Mammalian cell entry protein (Mce4A) is a member of MCE-family, and is being considered as a potential drug target of Mycobacterium tuberculosis infection because it is required for invasion and latent survival of pathogen by utilizing host's cholesterol. In the present study, we performed molecular docking followed by 100 ns MD simulation studies to understand the mechanism of interaction of Mce4A to the cholesterol derivatives and probucol. The selected ligands, cholesterol, 25-hydroxycholesterol, 5-cholesten-3β-ol-7-one and probucol bind to the predicted active site cavity of Mce4A, and complexes remain stable during entire simulation of 100 ns...
January 9, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29323337/regulatory-t-cells-as-a-new-therapeutic-target-for-atherosclerosis
#2
REVIEW
Han-Xiao Ou, Bing-Bing Guo, Qi Liu, Yu-Kun Li, Zhen Yang, Wen-Jie Feng, Zhong-Cheng Mo
Atherosclerosis is an autoimmune disease caused by self- and non-self-antigens contributing to excessive activation of T and B cell immune responses. These responses further aggravate vascular inflammation and promote progression of atherosclerosis and vulnerability to plaques via releasing pro-inflammatory cytokines. Regulatory T cells (Tregs) as the major immunoregulatory cells, in particular, induce and maintain immune homeostasis and tolerance by suppressing the immune responses of various cells such as T and B cells, natural killer (NK) cells, monocytes, and dendritic cells (DCs), as well as by secreting inhibitory cytokines interleukin (IL)-10, IL-35 and transcription growth factor β (TGF-β) in both physiological and pathological states...
January 11, 2018: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/29321591/respiratory-syncytial-virus-infection-changes-cargo-composition-of-exosome-released-from-airway-epithelial-cells
#3
Harendra Singh Chahar, Tiziana Corsello, Andrzej S Kudlicki, Narayana Komaravelli, Antonella Casola
Exosomes are microvesicles known to carry biologically active molecules, including RNA, DNA and proteins. Viral infections can induce profound changes in exosome composition, and exosomes have been implicated in viral transmission and pathogenesis. No information is current available regarding exosome composition and function during infection with Respiratory Syncytial Virus (RSV), the most important cause of lower respiratory tract infections in children. In this study, we characterized exosomes released from RSV-infected lung carcinoma-derived A549 cells...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321042/type-i-ifn-signature-in-childhood-onset-systemic-lupus-erythematosus-a-conspiracy-of-dna-and-rna-sensing-receptors
#4
M Javad Wahadat, Iris L A Bodewes, Naomi I Maria, Cornelia G van Helden-Meeuwsen, Annette van Dijk-Hummelman, Eline C Steenwijk, Sylvia Kamphuis, Marjan A Versnel
BACKGROUND: Childhood-onset systemic lupus erythematosus (cSLE) is an incurable multi-systemic autoimmune disease. Interferon type I (IFN-I) plays a pivotal role in the pathogenesis of SLE. The objective of this study was to assess the prevalence of the IFN-I signature and the contribution of cytosolic nucleic acid receptors to IFN-I activation in a cohort of primarily white cSLE patients. METHODS: The IFN-I score (positive or negative), as a measure of IFN-I activation, was assessed using real-time quantitative PCR (RT-PCR) expression values of IFN-I signature genes (IFI44, IFI44L, IFIT1, Ly6e, MxA, IFITM1) in CD14+ monocytes of cSLE patients and healthy controls (HCs)...
January 10, 2018: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/29311560/a-central-role-for-pi3k-akt-signaling-pathway-in-linking-samhd1-deficiency-to-the-type-i-interferon-signature
#5
Changhoon Oh, Jeongmin Ryoo, Kiwon Park, Baek Kim, Michele B Daly, DongYeon Cho, Kwangseog Ahn
The autoimmune disorder Aicardi-Goutières syndrome (AGS) is characterized by a constitutive type I interferon response. SAMHD1 possesses both dNTPase and RNase activities and mutations in SAMHD1 cause AGS; however, how SAMHD1-deficiency causes the type I interferon response in patients with AGS remains unknown. Here, we show that endogenous RNA substrates accumulated in the absence of SAMHD1 act as a major immunogenic source for the type I interferon response. Reconstitution of SAMHD1-negative human cells with wild-type but not RNase-defective SAMHD1 abolishes spontaneous type I interferon induction...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29311239/induction-of-il-10-by-borrelia-burgdorferi-is-regulated-by-the-action-of-cd14-dependent-p38-mapk-and-camp-mediated-chromatin-remodeling
#6
Bikash Sahay, Kathleen Bashant, Nicole J Nelson, Rebeca L Patsey, Shiva Kumar Gadila, Rebecca Boohaker, Ashutosh Verma, Klemen Strle, Timothy J Sellati
Host genotype influences the severity of murine Lyme borreliosis, caused by the spirochetal bacterium Borrelia burgdorferi C57BL/6 (B6) mice develop mild, whereas C3H/HeN (C3H) mice develop severe Lyme arthritis. Differential expression of interleukin 10 (IL-10) has long been associated with mouse strain differences in Lyme pathogenesis; however, the underlying mechanism(s) of this genotype-specific IL-10 regulation remained elusive. Herein we reveal a cAMP-mediated mechanism of IL-10 regulation in B6 macrophages that is substantially diminished in C3H macrophages...
January 8, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29306401/effects-of-lipoic-acid-on-migration-of-human-b-cells-and-monocyte-enriched-peripheral-blood-mononuclear-cells-in-relapsing-remitting-multiple-sclerosis
#7
Joshua D George, Edward Kim, Rebecca Spain, Dennis Bourdette, Sonemany Salinthone
Multiple sclerosis (MS) is a disease of the central nervous system characterized by inflammation and demyelination resulting in clinical disability. The rodent MS model suggests that infiltration of monocytes and B cells contributes to disease pathogenesis. Here, we compared the migratory capacity of human monocytes and B cells from healthy control (HC) and relapsing-remitting MS (RRMS) subjects, with or without lipoic acid (LA) treatment. Basal migration of monocyte-enriched PBMCs from RRMS subjects is significantly higher than HC PBMCs...
February 15, 2018: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29304171/mcp-1-kc-like-and-il-8-as-critical-mediators-of-pathogenesis-caused-by-babesia-canis
#8
Asier Galán, Iva Mayer, Renata Barić Rafaj, Krešo Bendelja, Velimir Sušić, José Joaquín Cerón, Vladimir Mrljak
Canine babesiosis caused by the intraerythrocytic protozoan parasite Babesia canis is a tick-borne disease characterized by a host response that involves both cellular and humoral immunity. This study focuses on the secretion of cytokines Granulocyte-Macrophage Colony-Stimulating Factor (GM-CSF), Keratinocyte Chemotactic-like (KC-like), Interleukins (IL)-2, IL-7, IL-8, IL-10, IL-15, IL-18 and Monocyte Chemotactic Protein-1 (MCP-1) in babesiosis caused by Babesia canis upon treatment with Imizol®. We assessed time dependent changes in cytokine levels and tested whether these changes correlate with pathogenesis of the disease...
2018: PloS One
https://www.readbyqxmd.com/read/29301628/platelet-derived-mrp-14-induces-monocyte-activation-in-patients-with-symptomatic-peripheral-artery-disease
#9
Rebecca Dann, Tarik Hadi, Emilie Montenont, Ludovic Boytard, Dornaszadat Alebrahim, Jordyn Feinstein, Nicole Allen, Russell Simon, Krista Barone, Kunihiro Uryu, Yu Guo, Caron Rockman, Bhama Ramkhelawon, Jeffrey S Berger
BACKGROUND: Peripheral artery disease (PAD), a diffuse manifestation of atherothrombosis, is a major cardiovascular threat. Although platelets are primary mediators of atherothrombosis, their role in the pathogenesis of PAD remains unclear. OBJECTIVES: The authors sought to investigate the role of platelets in a cohort of symptomatic PAD. METHODS: The authors profiled platelet activity, mRNA, and effector roles in patients with symptomatic PAD and in healthy controls...
January 2, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29297929/increased-expression-of-prkcb-mrna-in-peripheral-blood-mononuclear-cells-from-patients-with-systemic-lupus-erythematosus
#10
Zhengwei Zhu, Lulu Yang, Yaohua Zhang, Lu Liu, Yan Huang, Leilei Wen, Chao Yang, Liyun Chen, Wenjun Wang, Xianbo Zuo, Fusheng Zhou, Hongyan Wang, Huayang Tang, Xuejun Zhang, Sen Yang, Yujun Sheng, Yong Cui
The polymorphism of PRKCB has been proven to be associated with systemic lupus erythematosus (SLE) in our previous study. We aimed to investigate the relationship between expression of PRKCB mRNA and the Disease Activity Index (SLEDAI) and manifestations of SLE. Quantitative reverse transcription polymerase chain reaction (RT-PCR) was applied to examine the expression of PRKCB mRNA in peripheral blood mononuclear cells of 60 patients with SLE and 62 controls. The Sequenom MassArray System was used to detect genotype SNP rs16972959...
January 3, 2018: Annals of Human Genetics
https://www.readbyqxmd.com/read/29290406/elevated-expression-of-granulocyte-macrophage-colony-stimulating-factor-receptor-in-multiple-sclerosis-lesions
#11
Jaime Imitola, Javad Rasouli, Fumihiro Watanabe, Kader Mahajan, Aswhini D Sharan, Bogoljub Ciric, Guang-Xian Zhang, Abdolmohamad Rostami
Multiple sclerosis (MS) is a chronic inflammatory demyelinating and neurodegenerative disease that disproportionately affects young adults, leading to disability and high costs to society. Infiltration of T cells and monocytes into the central nervous system (CNS) is critical for disease initiation and progression. However, despite a great deal of effort the molecular mechanisms by which immune cells initiate and perpetuate CNS damage in MS have not yet been elucidated. In experimental autoimmune encephalomyelitis (EAE), an animal model of MS, granulocyte-macrophage colony-stimulating factor (GM-CSF) produced by pathogenic Th1 and Th17 cells is critical for the recruitment of monocytes into the CNS during the initial stage of disease...
December 22, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29288273/pro-inflammatory-cytokines-after-an-episode-of-acute-pancreatitis-associations-with-fasting-gut-hormone-profile
#12
Sayali A Pendharkar, Ruma G Singh, Shayal K Chand, Aya Cervantes, Maxim S Petrov
INTRODUCTION: Pro-inflammatory cytokines, such as interleukin (IL)-6, tumour necrosis factor (TNF)α, and monocyte chemoattractant protein (MCP)-1, are often elevated in individuals after acute pancreatitis but what determines their levels is poorly understood. Gut hormones have emerged as possible modulators of inflammatory response. The aim was to investigate the associations between pro-inflammatory cytokines and a comprehensive panel of gut hormones after an episode of acute pancreatitis...
December 29, 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/29277790/protein-expression-and-genetic-variation-of-il32-and-association-with-colorectal-cancer-in-swedish-patients
#13
Levar Shamoun, Blanka Kolodziej, Roland E Andersson, Jan Dimberg
BACKGROUND: Interleukin 32 (IL32) is an intracellular pluripotent cytokine produced by epithelial cells, monocytes, T-lymphocytes and natural killer cells and seems to be involved in the pathogenesis of cancer and inflammatory diseases. Our purpose was to assess the role of protein expression and genetic polymorphisms of IL32 in colorectal cancer (CRC) susceptibility. MATERIALS AND METHODS: To gain insight into clinical significance of IL32 in Swedish patients with CRC, using enzyme-linked immunosorbent assay, we determined whether IL32 protein level is altered in CRC tissue (n=75) compared with paired normal tissue and in plasma from patients with CRC (n=94) compared with controls (n=81)...
January 2018: Anticancer Research
https://www.readbyqxmd.com/read/29275848/mir-23b-suppresses-leukocyte-migration-and-pathogenesis-of-experimental-autoimmune-encephalomyelitis-by-targeting-ccl7
#14
Yuan Zhang, Juan-Juan Han, Xiao-Yan Liang, Li Zhao, Fei Zhang, Javad Rasouli, Zhe-Zhi Wang, Guang-Xian Zhang, Xing Li
MicroRNAs (miRNAs) are small, non-coding RNAs involved in immune response regulation. Specific miRNAs have been linked to the development of various autoimmune diseases; however, their contribution to the modulation of CNS-directed cellular infiltration remains unclear. In this study, we found that miR-23b, in addition to its reported functions in the suppression of IL-17-associated autoimmune inflammation, halted the progression of experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis (MS), by directly inhibiting the migration of pathogenic leukocytes to the CNS...
November 26, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/29261164/lipopolysaccharide-induced-acute-kidney-injury-is-dependent-on-an-il-18-receptor-signaling-pathway
#15
Yuji Nozaki, Shoichi Hino, Jinhai Ri, Kenji Sakai, Yasuaki Nagare, Mai Kawanishi, Kaoru Niki, Masanori Funauchi, Itaru Matsumura
The proinflammatory cytokine interleukin (IL)-18 is an important mediator of the organ failure induced by endotoxemia. IL-18 (known as an interferon-gamma (IFN-γ) inducing factor), and other inflammatory cytokines have important roles in lipopolysaccharide (LPS)-induced acute kidney injury (AKI). We investigated the effect of inflammatory cytokines and Toll-like receptor 4 (TLR4) expression, an event that is accompanied by an influx of monocytes, including CD4⁺ T cells and antigen-presenting cells (APCs) in IL-18Rα knockout (KO) mice and wild-type (WT) mice after LPS injection...
December 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29259711/recent-advances-in-the-treatment-of-skin-involvement-in-systemic-sclerosis
#16
REVIEW
Yoshihide Asano
Skin fibrosis is a devastating clinical condition commonly seen in skin-restricted and systemic disorders. The goal of skin fibrosis treatment is the restoration of abnormally activated dermal fibroblasts producing the excessive amount of extracellular matrix, which is generally a final consequence of the complex disease process including the activation of vascular and immune systems. Among various skin fibrotic conditions, the molecular mechanisms underlying dermal fibroblast activation have been mostly well studied in systemic sclerosis (SSc)...
2017: Inflammation and Regeneration
https://www.readbyqxmd.com/read/29259605/role-of-monocyte-macrophages-during-hiv-siv-infection-in-adult-and-pediatric-acquired-immune-deficiency-syndrome
#17
REVIEW
Kristen M Merino, Carolina Allers, Elizabeth S Didier, Marcelo J Kuroda
Monocytes/macrophages are a diverse group of cells that act as first responders in innate immunity and then as mediators for adaptive immunity to help clear infections. In performing these functions, however, the macrophage inflammatory responses can also contribute to pathogenesis. Various monocyte and tissue macrophage subsets have been associated with inflammatory disorders and tissue pathogeneses such as occur during HIV infection. Non-human primate research of simian immunodeficiency virus (SIV) has been invaluable in better understanding the pathogenesis of HIV infection...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29259394/characterizing-the-effect-of-supplements-on-the-phenotype-of-cultured-macrophages-from-patients-with-age-related-macular-degeneration
#18
Batya Rinsky, Shira Hagbi-Levi, Sarah Elbaz-Hayoun, Michelle Grunin, Itay Chowers
Purpose: Oral vitamin and mineral supplements reduce the risk of visual loss in age-related macular degeneration (AMD). However, the pathways that mediate this beneficial effect are poorly understood. Macrophages may exert oxidative, inflammatory, and angiogenic effects in the context of AMD. We aim to assess if oral supplements can modulate the macrophage phenotype in this disease. Methods: Monocytes were isolated from patients with neovascular AMD (nvAMD), cultured, matured to macrophages, and polarized to classical [M1 (stimulated by IFNγ and lipopolysaccharide (LPS))] and alternative [M2 (stimulated with IL-4 and IL-13)] phenotypes...
2017: Molecular Vision
https://www.readbyqxmd.com/read/29251792/extracellular-vesicles-from-mice-with-alcoholic-liver-disease-carry-a-distinct-protein-cargo-and-induce-macrophage-activation-via-hsp90
#19
Banishree Saha, Fatemeh Momen-Heravi, Istvan Furi, Karen Kodys, Donna Catalano, Anwesha Gangopadhyay, Reka Haraszti, Abhishek Satishchandran, Arvin Iracheta-Vellve, Adeyinka Adejumo, Scott A Shaffer, Gyongyi Szabo
A salient feature of alcoholic liver disease (ALD) is Kupffer cell (KC) activation and recruitment of inflammatory monocytes/macrophages (Mo/MØ). These key cellular events of ALD pathogenesis may be mediated by extracellular vesicles (EVs). EVs transfer biomaterials, including proteins and miRNAs, and have recently emerged as important effectors of intercellular communication. We hypothesized that circulating EVs from mice with ALD have a protein cargo characteristic of the disease and mediate biological effects by activating immune cells...
December 18, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29251087/the-clinical-significance-of-neutrophil-to-lymphocyte-ratio-and-monocyte-to-lymphocyte-ratio-in-guillain-barr%C3%A3-syndrome
#20
Yuanyuan Huang, Zhaojian Ying, Weiwei Quan, Weiwei Xiang, Dewei Xie, Yiyun Weng, Xiang Li, Jia Li, Xu Zhang
BACKGROUND: Guillain-Barré syndrome (GBS) was a severe peripheral nervous disease that leading to muscle weakness and areflexia. We now commonly accept a synthesis that inflammation and immunity play a key role in GBS pathogenesis. Many studies pointed out that neutrophil-to-lymphocyte ratio (NLR) and monocyte-to-lymphocyte ratio (MLR) are novel promising markers of inflammation or immunity. Our study aimed to evaluate whether the NLR and the MLR were associated to GBS or not. PATIENTS AND METHODS: We measured blood cell count in 334 individuals, including 117 GBS and 217 healthy controls...
December 18, 2017: International Journal of Neuroscience
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