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https://www.readbyqxmd.com/read/28808331/pro-and-anti-inflammatory-responses-of-peripheral-blood-mononuclear-cells-induced-by-staphylococcus-aureus-and-pseudomonas-aeruginosa-phages
#1
Jonas D Van Belleghem, Frédéric Clement, Maya Merabishvili, Rob Lavigne, Mario Vaneechoutte
The ability of bacteriophages to kill bacteria is well known, as is their potential use as alternatives to antibiotics. As such, bacteriophages reach high doses locally through infection of their bacterial host in the human body. In this study we assessed the gene expression profile of peripheral blood monocytes from six donors for twelve immunity-related genes (i.e. CD14, CXCL1, CXCL5, IL1A, IL1B, IL1RN, IL6, IL10, LYZ, SOCS3, TGFBI and TNFA) induced by Staphylococcus aureus phage ISP and four Pseudomonas aeruginosa phages (i...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807771/increase-of-intermediate-monocytes-in-gvhd-correlation-with-mdr1-th17-1-levels-and-the-effect-of-prednisolone-and-1%C3%AE-25-dihydroxyvitamin-d3
#2
Katharina Reinhardt-Heller, Insa Hirschberg, Peter Lang, Thomas Vogl, Rupert Handgretinger, Wolfgang A Bethge, Ursula Holzer
Graft-versus-host disease (GvHD) remains one of the major complications after allogeneic hematopoietic stem cell transplantation which is mainly treated with glucocorticoids such as prednisolone. In this study, the influence of monocyte subpopulations, prednisolone and 1α,25-Dihydroxyvitamin D3 on the induction of a pro-inflammatory subset of Th17 cells (MDR(+)Th17.1) characterized by CCR6(+)CXCR3(hi)CCR4(lo)CCR10(-)CD161(+) and stable expression of the multi-drug resistance protein type 1 (MDR1) was investigated...
August 11, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28807001/the-mek-inhibitor-selumetinib-complements-ctla-4-blockade-by-reprogramming-the-tumor-immune-microenvironment
#3
Edmund Poon, Stefanie Mullins, Amanda Watkins, Geoffrey S Williams, Jens-Oliver Koopmann, Gianfranco Di Genova, Marie Cumberbatch, Margaret Veldman-Jones, Shaun E Grosskurth, Vasu Sah, Alwin Schuller, Corrine Reimer, Simon J Dovedi, Paul D Smith, Ross Stewart, Robert W Wilkinson
BACKGROUND: T-cell checkpoint blockade and MEK inhibitor combinations are under clinical investigation. Despite progress elucidating the immuno-modulatory effects of MEK inhibitors as standalone therapies, the impact of MEK inhibition on the activity of T-cell checkpoint inhibitors remains incompletely understood. Here we sought to characterize the combined effects of MEK inhibition and anti-CTLA-4 mAb (anti-CTLA-4) therapy, examining effects on both T-cells and tumor microenvironment (TME)...
August 15, 2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28765037/vitamin-d-effects-on-monocytes%C3%AC-ccl-2-il6-and-cd14-transcription-in-addison-s-disease-and-hla-susceptibility
#4
A U Kraus, M Penna-Martinez, G Meyer, K Badenhoop
Addisońs disease is a rare autoimmune disorder leading to adrenal insufficiency and life-long glucocorticoid dependency. Vitamin D receptor (VDR) polymorphisms and vitamin D deficiency predispose to Addisońs disease. Aim of the current study was, to investigate potential anti-inflammatory vitamin D effects on monocytes in Addisońs disease, focusing on inflammatory CCL-2 and IL6, as well on monocyte CD14 markers. Addisońs disease is genetically linked to distinct HLA susceptibility alleles. Therefore we analyzed, whether HLA genotypes differed for vitamin D effects on monocyte markers...
July 29, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28763796/the-metabolic-regulator-mtorc1-controls-terminal-myeloid-differentiation
#5
Pui Y Lee, David B Sykes, Sarah Ameri, Demetrios Kalaitzidis, Julia F Charles, Nathan Nelson-Maney, Kevin Wei, Pierre Cunin, Allyn Morris, Astrid E Cardona, David E Root, David T Scadden, Peter A Nigrovic
Monocytes are derived from hematopoietic stem cells through a series of intermediate progenitor stages, but the factors that regulate this process are incompletely defined. Using a Ccr2/Cx3cr1 dual-reporter system to model murine monocyte ontogeny, we conducted a small-molecule screen that identified an essential role of mechanistic target of rapamycin complex 1 (mTORC1) in the development of monocytes and other myeloid cells. Confirmatory studies using mice with inducible deletion of the mTORC1 component Raptor demonstrated absence of mature circulating monocytes, as well as disruption in neutrophil and dendritic cell development, reflecting arrest of terminal differentiation at the granulocyte-monocyte progenitor stage...
May 26, 2017: Science Immunology
https://www.readbyqxmd.com/read/28747747/involvement-of-monocyte-subsets-in-the-immunopathology-of-giant-cell-arteritis
#6
Yannick van Sleen, Qi Wang, Kornelis S M van der Geest, Johanna Westra, Wayel H Abdulahad, Peter Heeringa, Annemieke M H Boots, Elisabeth Brouwer
Monocytes/macrophages are critical in systemic and local inflammation in giant cell arteritis (GCA) and possibly in clinically overlapping polymyalgia rheumatica (PMR). Therefore, we aimed to understand the contribution of monocyte subsets and the CX3CR1-CX3CL1 and CCR2-CCL2 migratory pathways, to the pathology of GCA. Peripheral blood monocytes were enumerated in samples from newly-diagnosed, untreated GCA and PMR patients and after prednisone-induced remission. The distribution of classical (CD14(bright)CD16(neg)) and the more pro-inflammatory, intermediate (CD14(bright)CD16+) and non-classical (CD14(dim)CD16+) monocyte subsets was analysed by flow cytometry...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28728849/lymphocyte-to-monocyte-ratio-is-an-independent-predictor-for-higher-syntax-scores-and-associated-with-adverse-events-in-acute-coronary-syndrome
#7
Selcuk Ozturk, Alparslan Kurtul
OBJECTIVES: Coronary atherosclerotic burden is associated with poor cardiovascular outcomes. The aim of this study was to investigate the relationship between lymphocyte-to-monocyte ratio (LMR) and SYNTAX score (SXs) in acute coronary syndrome (ACS) patients. MATERIAL AND METHODS: A total of 1585 patients who match the inclusion criteria were involved in the study. Peripheral blood samples were obtained from all patients within 10min upon admission to hospital from antecubital vein...
July 12, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28696254/human-monocyte-subsets-are-transcriptionally-and-functionally-altered-in-aging-in-response-to-pattern-recognition-receptor-agonists
#8
Talibah U Metcalf, Peter A Wilkinson, Mark J Cameron, Khader Ghneim, Cindy Chiang, Anne M Wertheimer, John B Hiscott, Janko Nikolich-Zugich, Elias K Haddad
Age-related alterations in immunity have been linked to increased incidence of infections and decreased responses to vaccines in the aging population. Human peripheral blood monocytes are known to promote Ag presentation and antiviral activities; however, the impact of aging on monocyte functions remains an open question. We present an in-depth global analysis examining the impact of aging on classical (CD14(+)CD16(-)), intermediate (CD14(+)CD16(+)), and nonclassical (CD14(dim)CD16(+)) monocytes. Monocytes sorted from nonfrail healthy adults (21-40 y) and old (≥65 y) individuals were analyzed after stimulation with TLR4, TLR7/8, and retinoic acid-inducible gene I agonists...
August 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28684413/a-crispr-cas9-approach-reveals-that-the-polymerase-activity-of-dna-polymerase-%C3%AE-is-dispensable-for-hiv-1-infection-in-dividing-and-nondividing-cells
#9
Russell W Goetze, Dong-Hyun Kim, Raymond F Schinazi, Baek Kim
Retrovirus integration into the host genome relies on several host enzymes, potentially including DNA polymerase β (Pol β). However, whether human Pol β; is essential for lentivirus replication in human cells is unclear. Here, we abolished Pol β expression by targeting its DNA polymerase domain with CRISPR/Cas9 in human monocytic THP-1 cells to investigate Pol β's role in HIV-1 transduction in both dividing and nondividing macrophage stages of THP-1 cells. Pol β-knockout was confirmed by enhanced sensitivity to methyl methanesulfonate - induced DNA damage...
July 6, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28680905/high-cellular-monocyte-activation-in-people-living-with-human-immunodeficiency-virus-on-combination-antiretroviral-therapy-and-lifestyle-matched-controls-is-associated-with-greater-inflammation-in-cerebrospinal-fluid
#10
Thijs Booiman, Ferdinand W Wit, Irma Maurer, Davide De Francesco, Caroline A Sabin, Agnes M Harskamp, Maria Prins, Paolo Garagnani, Chiara Pirazzini, Claudio Franceschi, Dietmar Fuchs, Magnus Gisslén, Alan Winston, Peter Reiss, Neeltje A Kootstra
BACKGROUND: Increased monocyte activation and intestinal damage have been shown to be predictive for the increased morbidity and mortality observed in treated people living with human immunodeficiency virus (PLHIV). METHODS: A cross-sectional analysis of cellular and soluble markers of monocyte activation, coagulation, intestinal damage, and inflammation in plasma and cerebrospinal fluid (CSF) of PLHIV with suppressed plasma viremia on combination antiretroviral therapy and age and demographically comparable HIV-negative individuals participating in the Comorbidity in Relation to AIDS (COBRA) cohort and, where appropriate, age-matched blood bank donors (BBD)...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28674706/the-effect-of-treatment-of-denture-related-stomatitis-on-peripheral-t-cells-and-monocytes
#11
Joanna Maciąg, Tomasz Mikołajczyk, Paweł Matusik, Daniel Nowakowski, Douglas Robertson, Anna Maciąg, Grzegorz Osmenda, Marta Cześnikiewicz-Guzik
PURPOSE: Systemic immune activation has been recently linked to chronic inflammatory disorders of the oral cavity, particularly to periodontitis. The purpose of this study was to determine whether treatment of a fungus-induced oral inflammation, namely denture-related stomatitis (DRS), can affect the activation of the systemic immune response. MATERIALS AND METHODS: Peripheral blood from patients with denture-related stomatitis caused by Candida albicans infection (n = 15) was collected at three time points: before treatment with nystatin, at the end of therapy and 2 months after finishing therapy...
2017: Oral Health & Preventive Dentistry
https://www.readbyqxmd.com/read/28673565/monocyte-subpopulations-study-in-patients-with-plaque-psoriasis
#12
Mariana Carvalho Costa, Bruno de Oliveira Rocha, Camilla Sampaio Paixão, Maria de Fátima Santos Paim de Oliveira, Lícia Maria Henrique da Mota, Lucas Pedreira de Carvalho
Psoriasis is a chronic and systemic, immune-mediated, inflammatory disease, mainly manifested by skin and / or joints lesions, presenting with a wide degree of clinical severity, but generally with great impact on patients' quality of life. Despite advances in the understanding of its pathogenesis, especially regarding the participation of T-lymphocytes and the key role of TNF, the triggering factor of the disease at the molecular level remains unknown, as well as the function of other cell populations. By presenting antigens to T-lymphocytes, monocytes assume an important role in both innate and adaptive immune response...
July 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28642277/adipose-tissue-macrophages-develop-from-bone-marrow-independent-progenitors-in-xenopus-laevis-and-mouse
#13
Syed F Hassnain Waqas, Anna Noble, Anh C Hoang, Grace Ampem, Manuela Popp, Sarah Strauß, Matthew Guille, Tamás Röszer
ATMs have a metabolic impact in mammals as they contribute to metabolically harmful AT inflammation. The control of the ATM number may have therapeutic potential; however, information on ATM ontogeny is scarce. Whereas it is thought that ATMs develop from circulating monocytes, various tissue-resident Mϕs are capable of self-renewal and develop from BM-independent progenitors without a monocyte intermediate. Here, we show that amphibian AT contains self-renewing ATMs that populate the AT before the establishment of BM hematopoiesis...
June 22, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28641299/monocyte-subsets-are-differentially-lost-from-the-circulation-during-acute-inflammation-induced-by-human-experimental-endotoxemia
#14
Tamar Tak, Roger van Groenendael, Peter Pickkers, Leo Koenderman
Three human monocyte subsets are recognized with different functions in the immune system: CD14++/CD16- classical monocytes (CM), CD14++/CD16+ intermediate monocytes (IM) and CD14+/CD16++ non-classical monocytes (NCM). Increased IM and NCM percentages have been reported under inflammatory conditions, yet little is known about monocyte subsets at the onset of inflammation. The human endotoxemia model is uniquely capable of studying the first phases of acute inflammation induced by intravenous injection of 2 ng/kg bodyweight lipopolysaccharide (LPS) into healthy volunteers...
June 23, 2017: Journal of Innate Immunity
https://www.readbyqxmd.com/read/28639993/peripheral-monocytes-macrophages-phenotypes-associated-to-the-evolution-of-cognitive-performance-in-hiv-infected-patients
#15
Massimiliano Fabbiani, Antonio Muscatello, Paolo Perseghin, Marco Bani, Arianna Incontri, Nicola Squillace, Giuseppe Lapadula, Andrea Gori, Alessandra Bandera
BACKGROUND: The contribution of monocyte activation in the development of HIV-associated neurocognitive disorders is not completely understood. This study aimed to explore the predictive value of peripheral monocyte/macrophage (M/M) phenotypes on the evolution of cognitive performance in a population of virologically-suppressed HIV-infected patients. SETTING: Prospective, observational, longitudinal study. METHODS: HIV-1-infected patients with HIV-RNA<50copies/mL for >12 months underwent neuropsychological examination at baseline and after one year...
June 19, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28638380/candida-albicans-yeast-pseudohyphal-and-hyphal-morphogenesis-differentially-affects-immune-recognition
#16
Liliane Mukaremera, Keunsook K Lee, Hector M Mora-Montes, Neil A R Gow
Candida albicans is a human opportunist pathogen that can grow as yeast, pseudohyphae, or true hyphae in vitro and in vivo, depending on environmental conditions. Reversible cellular morphogenesis is an important virulence factor that facilitates invasion of host tissues, escape from phagocytes, and dissemination in the blood stream. The innate immune system is the first line of defense against C. albicans infections and is influenced by recognition of wall components that vary in composition in different morphological forms...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28631213/the-constitutive-protease-release-by-primary-human-acute-myeloid-leukemia-cells
#17
Maria Honnemyr, Øystein Bruserud, Annette K Brenner
INTRODUCTION: Acute myeloid leukemia (AML) cells show constitutive release of matrix metalloproteases and their inhibitors. We now investigated this constitutive release of protease/protease regulators associated with carcinogenesis (ADAM12, uPA, cystatin B), angiogenesis (serpin E1, uPA, CD147), cancer cell migration (uPA, cystatin C), coagulation (ADAM TS13, serpin C1), inflammation (fetuin A, caspase 1, cystatin C), monocytic differentiation (CFD) or regulation of hematopoiesis (neutrophil elastase)...
June 19, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28620388/trichinella-spiralis-calreticulin-binds-human-complement-c1q-as-an-immune-evasion-strategy
#18
Limei Zhao, Shuai Shao, Yi Chen, Ximeng Sun, Ran Sun, Jingjing Huang, Bin Zhan, Xinping Zhu
As a multicellular parasitic nematode, Trichinella spiralis regulates host immune responses by producing a variety of immunomodulatory molecules to escape from host immune attack, but the mechanisms underlying the immune evasion are not well understood. Here, we identified that T. spiralis calreticulin (Ts-CRT), a Ca(2+)-binding protein, facilitated T. spiralis immune evasion by interacting with the first component of human classical complement pathway, C1q. In the present study, Ts-CRT was found to be expressed on the surface of different developmental stages of T...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28614806/review-of-rosai-dorfman-disease-new-insights-into-the-pathogenesis-of-this-rare-disorder
#19
Yanan Cai, Zhangzhen Shi, Yuansong Bai
Rosai-Dorfman disease (RDD) is a rare histiocytosis typically with bilateral painless cervical lymphadenopathy. Laboratory data are nonspecific, and the presence of emperipolesis in large foamy S-100+ CD1a- histiocytes is the prominent histologic feature. The pathogenesis of RDD still remains elusive. According to published studies, we propose that RDD cells might represent intermediate recruiting monocytes with differentiation blockade. Both disturbance of homoeostasis and inherent genomic alterations could contribute to initiation of the disorder through signal transduction...
June 15, 2017: Acta Haematologica
https://www.readbyqxmd.com/read/28609832/pembrolizumab-induced-thyroiditis-comprehensive-clinical-review-and-insights-into-underlying-involved-mechanisms
#20
Danae A Delivanis, Michael P Gustafson, Svetlana Bornschlegl, Michele M Merten, Lisa Kottschade, Sarah Withers, Allan B Dietz, Mabel Ryder
Context: Thyroid immune-related adverse events (irAEs) in patients treated with programmed death receptor-1 (PD-1) blockade are increasingly recognized as one of the most common adverse effects. Our aim was to determine the incidence and examine the potential mechanisms of anti-PD-1 induced thyroid irAEs. Design: Single center, retrospective cohort study. Patients and Measurements: We studied 93 patients with advanced cancer (aged 24–82 years; 60% males) who received at least one infusion of pembrolizumab...
May 9, 2017: Journal of Clinical Endocrinology and Metabolism
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