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https://www.readbyqxmd.com/read/29776615/a-new-and-efficient-culture-method-for-porcine-bone-marrow-derived-m1-and-m2-polarized-macrophages
#1
Jiye Gao, Maaike R Scheenstra, Albert van Dijk, Edwin J A Veldhuizen, Henk P Haagsman
BACKGROUND: Macrophages play an important role in the innate immune system as part of the mononuclear phagocyte system (MPS). They have a pro-inflammatory signature (M1-polarized macrophages) or anti-inflammatory signature (M2-polarized macrophages) based on expression of surface receptors and secretion of cytokines. However, very little is known about the culture of macrophages from pigs and more specific about the M1 and M2 polarization in vitro. METHODS: Porcine monocytes or mononuclear bone marrow cells were used to culture M1- and M2-polarized macrophages in the presence of GM-CSF and M-CSF, respectively...
June 2018: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29773170/iron-and-innate-antimicrobial-immunity-depriving-the-pathogen-defending-the-host
#2
REVIEW
Manfred Nairz, Stefanie Dichtl, Andrea Schroll, David Haschka, Piotr Tymoszuk, Igor Theurl, Günter Weiss
The acute-phase response is triggered by the presence of infectious agents and danger signals which indicate hazards for the integrity of the mammalian body. One central feature of this response is the sequestration of iron into storage compartments including macrophages. This limits the availability of this essential nutrient for circulating pathogens, a host defence strategy known as 'nutritional immunity'. Iron metabolism and the immune response are intimately linked. In infections, the availability of iron affects both the efficacy of antimicrobial immune pathways and pathogen proliferation...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29761404/genetic-models-of-macrophage-depletion
#3
Li Hua, Jiayuan Shi, Leonard D Shultz, Guangwen Ren
Macrophages are a heterogeneous population of innate immune cells and are distributed in most adult tissues. Certain tissue-resident macrophages with a prenatal origin, together with postnatal monocyte-derived macrophages, serve as the host scavenger system to eliminate invading pathogens, malignant cells, senescent cells, dead cells, cellular debris, and other foreign substances. As a key member of the mononuclear phagocyte system, macrophages play essential roles in regulation of prenatal development, tissue homeostasis, and disease progression...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29760704/exploring-the-immunomodulatory-moonlighting-activities-of-acute-phase-proteins-for-tolerogenic-dendritic-cell-generation
#4
REVIEW
Inmaculada Serrano, Ana Luque, Josep M Aran
The acute phase response is generated by an overwhelming immune-inflammatory process against infection or tissue damage, and represents the initial response of the organism in an attempt to return to homeostasis. It is mediated by acute phase proteins (APPs), an assortment of highly conserved plasma reactants of seemingly different functions that, however, share a common protective role from injury. Recent studies have suggested a crosstalk between several APPs and the mononuclear phagocyte system (MPS) in the resolution of inflammation, to restore tissue integrity and function...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29755450/the-complexity-of-fungal-%C3%AE-glucan-in-health-and-disease-effects-on-the-mononuclear-phagocyte-system
#5
REVIEW
Giorgio Camilli, Guillaume Tabouret, Jessica Quintin
β-glucan, the most abundant fungal cell wall polysaccharide, has gained much attention from the scientific community in the last few decades for its fascinating but not yet fully understood immunobiology. Study of this molecule has been motivated by its importance as a pathogen-associated molecular pattern upon fungal infection as well as by its promising clinical utility as biological response modifier for the treatment of cancer and infectious diseases. Its immune effect is attributed to the ability to bind to different receptors expressed on the cell surface of phagocytic and cytotoxic innate immune cells, including monocytes, macrophages, neutrophils, and natural killer cells...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29753960/effect-of-obesity-on-biodistribution-of-nanoparticles
#6
Claudiana de Jesus Felismino, Edward Helal-Neto, Filipe Leal Portilho, Suyene Rocha Pinto, Félix Sancenón, Ramón Martínez-Máñez, Agatha de Assis Ferreira, Simone Vargas da Silva, Thereza Christina Barja-Fidalgo, Ralph Santos-Oliveira
Nanoparticles have specific features (lipophilicity, surface charge, composition and size). Studies regarding the biological behavior of nanoparticles in diseases such diabetics and obesity are scarce. Here, we evaluated two nanoparticles: magnetic core mesoporous silica (MSN) (58 nm) and polycaprolactone (PCL) nanoparticle (280 nm) in obese mice. Changes in the biodistribution were observed, especially considering the mononuclear phagocyte system (MPS), and the visceral fat tissue. Nonetheless, our data corroborates the influence of size in the biodistribution in obese animals, supporting that smaller nanoparticles, may show a higher tissue deposition at spleen, due the associated splenomegaly and the complications arising from this state...
May 10, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29748002/the-multifaceted-role-of-the-renal-mononuclear-phagocyte-system
#7
REVIEW
Susanne F Viehmann, Alexander M C Böhner, Christian Kurts, Sebastian Brähler
The kidney contains a large and complex network of mononuclear phagocytes, which includes dendritic cells (DCs) and macrophages (MØs). The distinction between these cell types is traditionally based on the expression of molecular markers and morphology. However, several classification systems are used in parallel to identify DCs and MØs, leading to considerable uncertainty about their identity and functional roles. The discovery that a substantial proportion of macrophages in tissues like the kidney are embryonically derived further complicates the situation...
April 22, 2018: Cellular Immunology
https://www.readbyqxmd.com/read/29740711/new-avenues-for-nanoparticle-related-therapies
#8
Michael Zhao, Mingyao Liu
Development of nanoparticle-based drug delivery systems has been attempted for the treatment of cancer over the past decade. The enhanced permeability and retention (EPR) effect is the major mechanism to passively deliver nanodrugs to tumor tissue. However, a recent systematic review demonstrated limited success of these studies, with the clearance of nanoparticles by the mononuclear phagocytic system (MPS) being a major hurdle. Herein, we propose that nanotechnologists should reconsider their research focuses, aiming for therapeutic targets other than cancer...
May 8, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29740436/understanding-the-cellular-origin-of-the-mononuclear-phagocyte-system-sheds-light-on-the-myeloid-postulate-of-immune-paralysis-in-sepsis
#9
REVIEW
Lionel Franz Poulin, Corentin Lasseaux, Mathias Chamaillard
Sepsis, in essence, is a serious clinical condition that can subsequently result in death as a consequence of a systemic inflammatory response syndrome including febrile leukopenia, hypotension, and multiple organ failures. To date, such life-threatening organ dysfunction remains one of the leading causes of death in intensive care units, with an increasing incidence rate worldwide and particularly within the rapidly growing senior population. While most of the clinical trials are aimed at dampening the overwhelming immune response to infection that spreads through the bloodstream, based on several human immunological investigations, it is now widely accepted that susceptibility to nosocomial infections and long-term sepsis mortality involves an immunosuppressive phase that is characterized by a decrease in some subsets of dendritic cells (DCs)...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29723247/fc-engineering-of-anti-nectin-2-antibody-improved-thrombocytopenic-adverse-event-in-monkey
#10
Tsutomu Oshima, Hideaki Miyashita, Yoshimasa Ishimura, Yuki Ito, Yoko Tanaka, Akira Hori, Toshio Kokubo, Tomofumi Kurokawa
Nectin-2 is a transmembrane glycoprotein which is involved in the process of Ca2+-independent cell-cell adhesion. In our previous study, we have demonstrated that Nectin-2 is over-expressed in breast and ovarian cancer tissues by using gene expression analysis and immunohistochemistry. Furthermore, we discovered multiple anti-Nectin-2 fully human monoclonal antibodies which inhibited tumor growth in in vivo subcutaneous xenograft models with antibody-dependent cellular cytotoxicity (ADCC) as the principal mechanism of action...
2018: PloS One
https://www.readbyqxmd.com/read/29689381/on-the-use-of-superparamagnetic-hydroxyapatite-nanoparticles-as-an-agent-for-magnetic-and-nuclear-in-vivo-imaging
#11
Alessio Adamiano, Michele Iafisco, Monica Sandri, Martina Basini, Paolo Arosio, Tamara Canu, Giovanni Sitia, Antonio Esposito, Vincenzo Iannotti, Giovanni Ausanio, Eirini Fragogeorgi, Maritina Rouchota, George Loudos, Alessandro Lascialfari, Anna Tampieri
The identification of alternative biocompatible magnetic NPs for advanced clinical application is becoming an important need due to raising concerns about iron accumulation in soft issues associated to the administration of superparamagnetic iron oxide nanoparticles (NPs). Here, we report on the performance of previously synthetized iron-doped hydroxyapatite (FeHA) NPs as contrast agent for magnetic resonance imaging (MRI). The MRI contrast abilities of FeHA and Endorem® (dextran coated iron oxide NPs) were assessed by 1 H nuclear magnetic resonance relaxometry and their performance in healthy mice was monitored by a 7 Tesla scanner...
April 21, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29684429/simultaneous-in-vitro-generation-of-human-cd34-derived-dendritic-cells-and-mast-cells-from-non-mobilized-peripheral-blood-mononuclear-cells
#12
Pavla Taborska, Jirina Bartunkova, Daniel Smrz
Dendritic cells (DCs) and mast cells (MCs) are key players of the immune system, often coming in close proximity in peripheral tissues. The interplay of these cells is, however, still poorly understood especially with regards to human cells. The reason for that is the absence of a well established in vitro human cell-based study system that would allow a simultaneous preparation of both cell types. In this study, we show a method for simultaneous generation of DCs and MCs from CD34+ stem cell progenitors that were isolated from the non-adherent fraction of non-mobilized peripheral blood mononuclear cells of healthy donors...
April 20, 2018: Journal of Immunological Methods
https://www.readbyqxmd.com/read/29665644/biodistribution-of-free-and-encapsulated-99m-tc-fluconazole-in-an-infection-model-induced-by-candida-albicans
#13
Danielle Nogueira de Assis, Raquel Silva Araújo, Leonardo Lima Fuscaldi, Simone Odília Antunes Fernandes, Vanessa Carla Furtado Mosqueira, Valbert Nascimento Cardoso
BACKGROUND: Candida spp is an etiologic agent of fungal infections in hospitals and resistance to treatment with antifungals has been extensively reported. Thus, it is very important to develop formulations that increase effectiveness with low toxicity. In this sense, nanocarriers have been investigated, once they modify drug biodistribution profile. Thus, this study aimed to evaluate the biodistribution of free and encapsulated 99m Tc-fluconazole into nanocapsules (NCs) in an experimental immunosuppressed murine model of Candida albicans infection...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29651422/-aspergillus-induced-superoxide-production-by-cystic-fibrosis-phagocytes-is-associated-with-disease-severity
#14
Shan F Brunel, Janet A Willment, Gordon D Brown, Graham Devereux, Adilia Warris
Aspergillus fumigatus infects up to 50% of cystic fibrosis (CF) patients and may play a role in progressive lung disease. As cystic fibrosis transmembrane conductance regulator is expressed in cells of the innate immune system, we hypothesised that impaired antifungal immune responses play a role in CF-related Aspergillus lung disease. Peripheral blood mononuclear cells, polymorphonuclear cells (PMN) and monocytes were isolated from blood samples taken from CF patients and healthy volunteers. Live-cell imaging and colorimetric assays were used to assess antifungal activity in vitro ...
April 2018: ERJ Open Research
https://www.readbyqxmd.com/read/29650244/heart-macrophages-and-dendritic-cells-in-sickness-and-in-health-a-tale-of-a-complicated-marriage
#15
Katrien Van der Borght, Bart N Lambrecht
Heart disease is the major cause of death and it is broadly recognized that the immune system plays a central role in healthy and injured heart. Here, we focus on the contribution of various subsets of mononuclear phagocytes in the cardiac system. Macrophages and dendritic cells reside in the healthy myocardium to fulfill homeostatic functions and rapidly increase in numbers in diseases like myocardial ischemia and myocarditis to contribute to disease or resolve it. Recent experiments have revealed the extraordinary heterogeneity of cardiac mononuclear phagocytes that differ in origin, lifespan, phenotype and function...
April 5, 2018: Cellular Immunology
https://www.readbyqxmd.com/read/29627477/distribution-of-mannose-receptor-in-blunt-snout-bream-megalobrama-amblycephala-during-the-embryonic-development-and-its-immune-response-to-the-challenge-of-aeromonas-hydrophila
#16
Changsong Wu, Xiaoheng Zhao, Sarath Babu V, Gailing Yuan, Weimin Wang, Jianguo Su, Xiaoling Liu, Li Lin
The mannose receptor (MR) is a type I transmembrane protein. Its ectodomain has eight C-type lectin-like domains, which are able to recognize and mediate the phagocytosis of a wide range of pathogens. Comprehensive studies have revealed that mammalian MR is widely distributed in the mononuclear phagocyte system (MPS, previously known as the reticuloendothelial system) and play a key role both in the physiological clearance and cell activation. Hitherto, neither the MR distribution, nor the function of clearance and cell activation has been investigated in fish...
April 6, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29626941/imaging-macrophage-associated-inflammation
#17
REVIEW
Catherine A Foss, Julian Sanchez-Bautista, Sanjay K Jain
Macrophages belong to the mononuclear phagocyte system comprising closely related cells of bone marrow origin. Activated macrophages are critical in several diseases such as tuberculosis, sarcoidosis, Crohn's disease, and atherosclerosis. Noninvasive imaging techniques that can specifically image activated macrophages could therefore help in differentiating various forms of inflammatory diseases and to monitor therapeutic responses.
May 2018: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/29602922/indicators-of-phagocytosis-in-women-with-acne-during-comprehensive-treatment-that-included-immunotherapy-and-probiotics
#18
Orysya О Syzon, Marianna О Dashko
OBJECTIVE: Introduction: Acne is one of the most common dermatological diseases. It may have a chronic course, leaving permanent marks, and in last years has been tending to have more and more severe clinical course with widespread skin lesions. According to recent studies, the development of acne is due to the combined effect of endogenous and exogenous factors, among which endocrine diseases (quite a significant aspect), disorders of metabolic processes, reduced systemic immunity and phagocytic ability of mononuclear phagocytes and granulocytes at various stages of phagocytosis of pyogenic cocci, which contributes to more severe clinical course, and frequent relapse of this diseases...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29570694/enteric-virome-sensing-its-role-in-intestinal-homeostasis-and-immunity
#19
REVIEW
Rebecca N Metzger, Anne B Krug, Katharina Eisenächer
Pattern recognition receptors (PRRs) sensing commensal microorganisms in the intestine induce tightly controlled tonic signaling in the intestinal mucosa, which is required to maintain intestinal barrier integrity and immune homeostasis. At the same time, PRR signaling pathways rapidly trigger the innate immune defense against invasive pathogens in the intestine. Intestinal epithelial cells and mononuclear phagocytes in the intestine and the gut-associated lymphoid tissues are critically involved in sensing components of the microbiome and regulating immune responses in the intestine to sustain immune tolerance against harmless antigens and to prevent inflammation...
March 23, 2018: Viruses
https://www.readbyqxmd.com/read/29552013/differential-phagocytic-properties-of-cd45-low-microglia-and-cd45-high-brain-mononuclear-phagocytes-activation-and-age-related-effects
#20
Srikant Rangaraju, Syed Ali Raza, Noel Xiang'An Li, Ranjita Betarbet, Eric B Dammer, Duc Duong, James J Lah, Nicholas T Seyfried, Allan I Levey
In the central nervous system (CNS), microglia are innate immune mononuclear phagocytes (CNS MPs) that can phagocytose infectious particles, apoptotic cells, neurons, and pathological protein aggregates, such as Aβ in Alzheimer's disease (AD). While CD11b+ CD45low microglia account for the majority of CNS MPs, a small population of CD11b+ CD45high CNS MPs is also recognized in AD that surround Aβ plaques. These transcriptionally and pathologically unique CD45high cells have unclear origin and undefined phagocytic characteristics...
2018: Frontiers in Immunology
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