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mononuclear phagocyte system

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https://www.readbyqxmd.com/read/28421864/selfie-autoimmunity
#1
Haseeb Ahsan
The immune system provides protection to tissues damaged by infectious microrganisms or physical damage. In autoimmune diseases, the immune system recognizes and attacks its own tissues i.e., self-destruction. Various agents such as genetic factors and environmental triggers are thought to play a major role in the development of autoimmune diseases. A common feature of all autoimmune diseases is the presence of autoantibodies and inflammation, including mononuclear phagocytes, autoreactive T lymphocytes and autoantibody producing B cells (plasma cells)...
April 19, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28416142/nanoparticle-mediated-drug-delivery-system-for-atherosclerotic-cardiovascular-disease
#2
REVIEW
Tetsuya Matoba, Jun-Ichiro Koga, Kaku Nakano, Kensuke Egashira, Hiroyuki Tsutsui
Administration of drugs and other therapeutic agents has been the central strategy of contemporary medicine for cardiovascular disease. The use of drug delivery systems (DDS) includes micelles, liposomes, polymeric nanoparticles, dendrimers, carbon nanotubes, and crystalline metals. Nano-DDS modify in vivo drug kinetics, depending on (patho)physiological mechanisms such as retard excretion, vascular permeability, and incorporation by mononuclear phagocyte systems, which constitute the 'passive-targeting' property of nano-DDS...
April 13, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28400539/mass-cytometry-deep-phenotyping-of-human-mononuclear-phagocytes-and-myeloid-derived-suppressor-cells-from-human-blood-and-bone-marrow
#3
Mikael Roussel, P Brent Ferrell, Allison R Greenplate, Faustine Lhomme, Simon Le Gallou, Kirsten E Diggins, Douglas B Johnson, Jonathan M Irish
The monocyte phagocyte system (MPS) includes numerous monocyte, macrophage, and dendritic cell (DC) populations that are heterogeneous, both phenotypically and functionally. In this study, we sought to characterize those diverse MPS phenotypes with mass cytometry (CyTOF). To identify a deep phenotype of monocytes, macrophages, and DCs, a panel was designed to measure 38 identity, activation, and polarization markers, including CD14, CD16, HLA-DR, CD163, CD206, CD33, CD36, CD32, CD64, CD13, CD11b, CD11c, CD86, and CD274...
April 11, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28399906/target-organs-for-lymphocystis-disease-virus-replication-in-gilthead-seabream-sparus-aurata
#4
Estefania J Valverde, Juan J Borrego, M Carmen Sarasquete, Juan B Ortiz-Delgado, Dolores Castro
The lymphocystis disease (LCD), the main viral pathology described in cultured gilthead seabream (Sparus aurata), is a self-limiting condition characterized by the appearance of hypertrophied fibroblasts (named lymphocysts) in the connective tissue of fish, primarily in the skin and fins. The causative agent of the disease is the Lymphocystis disease virus (LCDV), a member of the Iridoviridae family. In the present study, LCDV genome and transcripts were detected by real-time PCR in caudal fin, as well as in several internal organs, such as intestine, liver, spleen, kidney and brain, from asymptomatic, diseased and recovered gilthead seabream juveniles...
April 11, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28391709/immune-modulation-properties-of-herbal-plant-leaves-phyllanthus-niruri-aqueous-extract-on-immune-cells-of-tuberculosis-patient-in-vitro-study
#5
Denise Utami Putri, Ning Rintiswati, Marsetyawan Hne Soesatyo, Sofia Mubarika Haryana
Disease progression in Tuberculosis (TB) is dependent on host's immune system. Phyllanthus niruri, a traditional herb, has long been used to boost immune system in Indonesian society. This study aimed to observe the potential role of P. niruri in inducing immune cells activity in TB patients by in vitro approach. Peripheral blood mononuclear cells (PBMCs) and macrophages were collected from active pulmonary TB patients. After stimulation with graded doses of P. niruri aqueous extract, cell proliferation, phagocytic activity and nitric oxide (NO) release were analysed...
April 10, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28380648/-polysialic-acid-for-immunomodulation-in-an-animal-model-for-wet-age-related-macular-degeneration-amd
#6
Thomas Langmann, Sascha Fauser
Background Chronic activation of the innate immune system is a hallmark of retinal degenerative diseases, including age-related macular degeneration (AMD). Overt microglia and macrophage reactivity, as well as dysregulation of the alternative complement system, trigger and sustain retinal degeneration. It is now accepted that there exists a vicious cycle of mononuclear phagocyte reactivity, abnormal intrinsic complement activation, damage of Bruch's membrane, dysfunction of the retinal pigment epithelium, photoreceptor degeneration and choroidal neovascularization (CNV)...
April 5, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28375632/tumor-acidity-nir-controlled-interaction-of-transformable-nanoparticle-with-biological-systems-for-cancer-therapy
#7
Dong-Dong Li, Yinchu Ma, Jinzhi Du, Wei Tao, Xiao-Jiao Du, Xian-Zhu Yang, Jun Wang
Precisely controlling the interaction of nanoparticles with biological systems (nano-bio interactions) from the injection site to biological targets shows great potential for biomedical applications. Inspired by the ability of nanoparticles to alter their physicochemical properties according to different stimuli, we explored the tumor acidity and near-infrared (NIR) light activated transformable nanoparticle (DA)TAT-NPIR&DOX. This nanoparticle consists of a tumor acidity-activated TAT (the TAT lysine residues' amines was modified with 2,3-dimethylmaleic anhydride (DA)), a flexible chain polyphosphoester core co-encapsulated a NIR dye IR-780 and DOX (doxorubicin)...
April 4, 2017: Nano Letters
https://www.readbyqxmd.com/read/28370104/recent-advances-in-gut-immunology
#8
Nick Powell, Thomas T MacDonald
In recent years there have been significant advances in our understanding of the mucosal immune system. In addition to unravelling some of the complexities of this system, including the discovery of completely new cells types, further insights into the three way interactions between mucosal immune cells, the intestinal epithelium and the microbial communities colonizing the GI tract, promises to redefine our understanding of how intestinal homeostasis is maintained, but also how dysregulation of these highly integrated interactions conspires to cause disease...
March 31, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28361953/cell-to-cell-transfer-of-saa1-protein-in-a-cell-culture-model-of-systemic-aa-amyloidosis
#9
Stephanie Claus, Ioana Puscalau-Girtu, Paul Walther, Tatiana Syrovets, Thomas Simmet, Christian Haupt, Marcus Fändrich
Systemic AA amyloidosis arises from the misfolding of serum amyloid A1 (SAA1) protein and the deposition of AA amyloid fibrils at multiple sites within the body. Previous research already established that mononuclear phagocytes are crucial for the formation of the deposits in vivo and exposure of cultures of such cells to SAA1 protein induces the formation of amyloid deposits within the culture dish. In this study we show that both non-fibrillar and fibrillar SAA1 protein can be readily transferred between cultured J774A...
March 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345586/new-insights-into-mononuclear-phagocyte-biology-from-the-visual-system
#10
REVIEW
Nancy J Reyes, Emily G O'Koren, Daniel R Saban
Major advances in mononuclear phagocyte biology have been made but key questions pertinent to their roles in health and disease remain, including in the visual system. One problem concerns how dendritic cells can trigger immune responses from certain tightly regulated immune- privileged sites of the eye. Another, albeit separate, problem involves whether there are functional specializations for microglia versus monocytes in retinal neurodegeneration. In this Review, we examine novel insights in eye immune privilege and, separately, we discuss recent inroads concerning retinal degeneration...
March 27, 2017: Nature Reviews. Immunology
https://www.readbyqxmd.com/read/28320855/salt-sensitivity-of-angiogenesis-inhibition-induced-blood-pressure-rise-role-of-interstitial-sodium-accumulation
#11
Stephanie Lankhorst, David Severs, Lajos Markó, Natalia Rakova, Jens Titze, Dominik N Müller, A H Jan Danser, Anton H van den Meiracker
In response to salt loading, Na(+) and Cl(-) accumulate in the skin in excess of water, stimulating skin lymphangiogenesis via activation of the mononuclear phagocyte system cell-derived vascular endothelial growth factor-C-vascular endothelial growth factor type 3 receptor signaling pathway. Inhibition of this pathway results in salt-sensitive hypertension. Sunitinib is an antiangiogenic, anticancer agent that blocks all 3 vascular endothelial growth factor receptors and increases blood pressure. We explored the salt dependency of sunitinib-induced hypertension and whether impairment of skin lymphangiogenesis is an underlying mechanism...
March 20, 2017: Hypertension
https://www.readbyqxmd.com/read/28304152/reprogramming-of-histone-methylation-controls-the-differentiation-of-monocytes-into-macrophages
#12
Qi-Fan Zheng, Hui-Min Wang, Zhan-Feng Wang, Jin-Yang Liu, Qi Zhang, Li Zhang, Yuan-Hua Lu, Han You, Guang-Hui Jin
Subset heterogeneity of the mononuclear phagocyte system (MPS) is controlled by defined transcriptional networks and programs; however, the dynamic establishment of programs that control broad, orchestrated expression of transcription factors (TFs) during the progression of monocyte-into-phagocyte (MP) differentiation remains largely unexplored. By using chromatin immunoprecipitation assays, we show the extensive trimethylation of histone H3 lysine 4 (H3K4me3) as well as histone H3 lysine 27 (H3K27me3) occupancy with broad footprints at the promoters of MP differentiation-related TFs, such as HOXA and FOXO genes, KLF4, IRF8 and others...
March 17, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28282373/murine-models-of-scrub-typhus-associated-with-host-control-of-orientia-tsutsugamushi-infection
#13
Nicole L Mendell, Donald H Bouyer, David H Walker
BACKGROUND: Scrub typhus, a febrile illness of substantial incidence and mortality, is caused by infection with the obligately intracellular bacterium Orientia tsutsugamushi. It is estimated that there are more than one million cases annually transmitted by the parasitic larval stage of trombiculid mites in the Asia-Pacific region. The antigenic and genetic diversity of the multiple strains of O. tsutsugamushi hinders the advancement of laboratory diagnosis, development of long-lasting vaccine-induced protection, and interpretation of clinical infection...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28275562/a-comprehensive-literatures-update-of-clinical-researches-of-superparamagnetic-resonance-iron-oxide-nanoparticles-for-magnetic-resonance-imaging
#14
REVIEW
Yì Xiáng J Wáng, Jean-Marc Idée
This paper aims to update the clinical researches using superparamagnetic iron oxide (SPIO) nanoparticles as magnetic resonance imaging (MRI) contrast agent published during the past five years. PubMed database was used for literature search, and the search terms were (SPIO OR superparamagnetic iron oxide OR Resovist OR Ferumoxytol OR Ferumoxtran-10) AND (MRI OR magnetic resonance imaging). The literature search results show clinical research on SPIO remains robust, particularly fuelled by the approval of ferumoxytol for intravenously administration...
February 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28267316/advances-toward-more-efficient-targeted-delivery-of-nanoparticles-in-vivo-understanding-interactions-between-nanoparticles-and-cells
#15
Ester Polo, Manuel Collado, Beatriz Pelaz, Pablo Del Pino
In this Perspective, we describe current challenges and recent advances in efficient delivery and targeting of nanoparticles in vivo. We discuss cancer therapy, nanoparticle-biomolecule interactions, nanoparticle trafficking in cells, and triggers and responses to nanoparticle-cell interactions. No matter which functionalization strategy to target cancer is chosen, passive or active targeting, more than 99% of the nanoparticles administered in vivo end up in the mononuclear phagocytic system, mainly sequestered by macrophages...
March 28, 2017: ACS Nano
https://www.readbyqxmd.com/read/28264969/cooperation-of-gastric-mononuclear-phagocytes-with-helicobacter-pylori-during-colonization
#16
Monica Viladomiu, Josep Bassaganya-Riera, Nuria Tubau-Juni, Barbara Kronsteiner, Andrew Leber, Casandra W Philipson, Victoria Zoccoli-Rodriguez, Raquel Hontecillas
Helicobacter pylori, the dominant member of the human gastric microbiota, elicits immunoregulatory responses implicated in protective versus pathological outcomes. To evaluate the role of macrophages during infection, we employed a system with a shifted proinflammatory macrophage phenotype by deleting PPARγ in myeloid cells and found a 5- to 10-fold decrease in gastric bacterial loads. Higher levels of colonization in wild-type mice were associated with increased presence of mononuclear phagocytes and in particular with the accumulation of CD11b(+)F4/80(hi)CD64(+)CX3CR1(+) macrophages in the gastric lamina propria...
April 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28263073/investigation-into-the-biological-impact-of-block-size-on-cathepsin-s-degradable-hpma-copolymers
#17
Wei Fan, Wenting Zhang, Yinnong Jia, Susan K Brusnahan, Jered C Garrison
N-(2-Hydroxypropyl)methacrylamide (HPMA) copolymers have been studied as an efficient carrier for drug delivery and tumor imaging. However, as with many macromolecular platforms, the substantial accumulation of HPMA copolymer by the mononuclear phagocyte system (MPS)-associated tissues, such as the blood, liver, and spleen, has inhibited its clinical translation. Our laboratory is pursuing approaches to improve the diagnostic and radiotherapeutic effectiveness of HPMA copolymers by reducing the nontarget accumulation...
March 21, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28257233/three-unique-interstitial-macrophages-in-the-murine-lung-at-steady-state
#18
Sophie L Gibbings, Stacey M Thomas, Shaikh M Atif, Alexandra L McCubbrey, A Nicole Desch, Thomas Danhorn, Sonia M Leach, Donna L Bratton, Peter M Henson, William J Janssen, Claudia V Jakubzick
RATIONALE: The current paradigm in macrophage biology is that some tissues mainly contain macrophages from embryonic origin such as microglia in the brain, while other tissues contain postnatal-derived macrophages, such as the gut. However, in the lung and in other organs such as the skin, there are both embryonic and postnatal-derived macrophages. OBJECTIVES: In this study, we demonstrate in the steady-state lung that the mononuclear phagocyte system is comprised of three newly identified interstitial macrophages (IMs), alveolar macrophages (AMs), dendritic cells (DCs) and few extravascular monocytes...
March 3, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28236968/regulation-of-embryonic-and-postnatal-development-by-the-csf-1-receptor
#19
Violeta Chitu, E Richard Stanley
Macrophages are found in all tissues and regulate tissue morphogenesis during development through trophic and scavenger functions. The colony stimulating factor-1 (CSF-1) receptor (CSF-1R) is the major regulator of tissue macrophage development and maintenance. In combination with receptor activator of nuclear factor κB (RANK), the CSF-1R also regulates the differentiation of the bone-resorbing osteoclast and controls bone remodeling during embryonic and early postnatal development. CSF-1R-regulated macrophages play trophic and remodeling roles in development...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28235648/orthogonal-near-infrared-upconversion-co-regulated-site-specific-o2-delivery-and-photodynamic-therapy-for-hypoxia-tumor-by-using-red-blood-cell-microcarriers
#20
Peiyuan Wang, Xiaomin Li, Chi Yao, Wenxing Wang, Mengyao Zhao, Ahmed Mohamed El-Toni, Fan Zhang
Pre-existing hypoxia in tumors can result in an inadequate oxygen supply during photodynamic therapy (PDT), which in turn hampers photodynamic efficacy. To overcome this problem, we developed an orthogonal near-infrared upconversion controlled red blood cell (RBC) microcarriers to selectively deliver O2 in hypoxia area. Moreover, this RBC microcarriers are able to overcome a series of complex biological barriers which include transporting across the inflamed endothelium, evading mononuclear phagocyte system, reducing reticuloendothelial system uptake...
February 14, 2017: Biomaterials
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