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M1 polarization

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https://www.readbyqxmd.com/read/29353306/toxoplasma-gondii-antigen-sag2a-differentially-modulates-il-1%C3%AE-expression-in-resistant-and-susceptible-murine-peritoneal-cells
#1
Jamilly Azevedo Leal-Sena, Jane Lima Dos Santos, Thaise Anne Rocha Dos Santos, Edson Mário de Andrade, Tiago Antônio de Oliveira Mendes, Juliano Oliveira Santana, Tiago Wilson Patriarca Mineo, José Roberto Mineo, Jair Pereira da Cunha-Júnior, Carlos Priminho Pirovani
The cell surface of Toxoplasma gondii is covered by antigens (SAGs) from the SRS family anchored by glycosylphosphatidylinositol (GPI) and includes antigens from the SAG2 family. Among these, the SAG2A surface antigen shows great potential in activating humoral responses and has been used in characterizing the acute phase of infection and in the serological diagnosis of toxoplasmosis. In this study, we aimed to evaluate rSAG2A-induced proteins in BALB/c and C57BL/c mice macrophages and to evaluate the phenotypic polarization induced in the process...
January 20, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29350825/ang-ii-facilitated-cd11-ly6chi-cells-reprogramming-into-m1-like-macrophage-through-erk1-2-or-p38-stat3-pathway-and-involved-in-eam
#2
Hongxiang Lu, Yan Wu, Xiaoyi Shao, Shanshan Zhou, Yuanyuan Jiang, Rong Chen, Gangjun Zong, Huaxi Xu, Zhaoliang Su
Macrophage, a highly plastic population, is widely distributed. Macrophage functions are settled and acquired polarization programs in response to microenvironmental signals and involved in many inflammatory disorders, such as experimental autoimmune myocarditis (EAM). Phenotypic and functional changes in macrophage are considered as an important determinant of disease progression and/or regression. Angiotensin II (ANG II), as a powerful proinflammatory factor, plays critical roles in inflammatory diseases and macrophage recruitment...
January 19, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29348724/ginsenoside-rg3-promotes-inflammation-resolution-through-m2-macrophage-polarization
#3
Saeromi Kang, Soo-Jin Park, Ae-Yeon Lee, Jin Huang, Hae-Young Chung, Dong-Soon Im
Background: Ginsenosides have been reported to have many health benefits, including anti-inflammatory effects, and the resolution of inflammation is now considered to be an active process driven by M2-type macrophages. In order to determine whether ginsenosides modulate macrophage phenotypes to reduce inflammation, 11 ginsenosides were studied with respect to macrophage polarization and the resolution of inflammation. Methods: Mouse peritoneal macrophages were polarized into M1 or M2 phenotypes...
January 2018: Journal of Ginseng Research
https://www.readbyqxmd.com/read/29344657/effects-of-hereditary-moderate-high-fat-diet-on-metabolic-performance-and-physical-endurance-capacity-in-c57bl-6-offspring
#4
Fang Liu, Guirong Zhang, Xue Sheng, Shang Liu, Meng Cui, Heyun Guo, Jianbin Xue, Lingyun Zhang
Obesity in pregnant women presents a risk to fetal health, leading to numerous metabolic syndromes and chronic inflammation risks. Previously, physical exercise was considered to be one of the primary treatments for obesity. However, the effect of fat consumption throughout the life cycle on physical endurance capacity remains unknown. A total of two groups of female mice (age, 6 weeks; C57BL/6J) were fed with a normal chow diet and a moderate high fat diet (MHFD), during pregnancy and lactation (8 weeks), with the offspring receiving the same diet as the mother...
January 16, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29343199/cd204-expressing-tumor-associated-macrophages-are-associated-with-malignant-high-grade-and-hormone-receptor-negative-canine-mammary-gland-tumors
#5
Byung-Joon Seung, Ha-Young Lim, Jong-Il Shin, Hyun-Woo Kim, Seung-Hee Cho, Soo-Hyeon Kim, Jung-Hyang Sur
Tumor-associated macrophages (TAMs) are an important component of leukocyte infiltration in tumors. TAMs can be classified into M1 and M2 phenotypes. In the present study, the expression of CD204, an M2-polarized macrophage receptor, was investigated by immunohistochemistry in the area surrounding TAMs in 101 cases of canine mammary gland tumor (CMT). We examined the relationship between M2-polarized TAMs and malignancy, histological subtype, histological grade, molecular subtype, hormone receptor (HR) status, and clinical obesity indices...
January 1, 2018: Veterinary Pathology
https://www.readbyqxmd.com/read/29343083/polarized-macrophage-subsets-differentially-express-the-drug-efflux-transporters-mrp1-and-bcrp-resulting-in-altered-hiv-production
#6
Hui He, Merrion Buckley, Bernard Britton, Ying Mu, Kristin Warner, Santosh Kumar, Theodore J Cory
Introduction Macrophages play an important role in HIV, where they are a cellular reservoir. Macrophages are polarized into two phenotypes: pro-inflammatory M1 macrophages and anti-inflammatory M2 macrophages, which may have altered expression of drug efflux transporters, including BCRP and MRP1. These differences may result in subtherapeutic concentrations of antiretrovirals inside of macrophages and viral replication. Methods U937 and U1 cells were polarized to the M1 or M2 phenotype via IFN-γ and LPS, or IL-4, IL-13, and LPS...
January 2018: Antiviral Chemistry & Chemotherapy
https://www.readbyqxmd.com/read/29342151/cd8-signaling-in-microglia-macrophage-m1-polarization-in-a-rat-model-of-cerebral-ischemia
#7
Jan Boddaert, Kenny Bielen, Bart 's Jongers, Ekta Manocha, Laetitia Yperzeele, Patrick Cras, Daniel Pirici, Samir Kumar-Singh
Classical or M1 activity of microglia/macrophages has been described in several neurodegenerative and brain inflammatory conditions and has also been linked to expansion of ischemic injury in post-stroke brain. While different pathways of M1 polarization have been suggested to occur in the post-stroke brain, the precise underlying mechanisms remain undefined. Using a transient middle cerebral artery occlusion (MCAO) rat model, we showed a progressive M2 to M1 polarization in the perilesional brain region with M1 cells becoming one of the dominant subsets by day 4 post-stroke...
2018: PloS One
https://www.readbyqxmd.com/read/29340098/icam-1-regulates-macrophage-polarization-by-suppressing-mcp-1-expression-via-mir-124-upregulation
#8
Wei Gu, Lun Yao, Lexing Li, Jianping Zhang, Aaron T Place, Richard D Minshall, Guoquan Liu
Intercellular adhesion molecule-1 is the adhesion molecule mediating leukocyte firm adhesion to endothelial cells, plays a critical role in subsequent leukocyte transmigration. ICAM-1 is also expressed in other cells including macrophages; however, the role of this adhesion molecule in mediating macrophage functions remains enigmatic. We report that ICAM-1 regulates macrophage polarization by positively modulating miR-124 expression. We found higher expression levels of monocyte chemotactic protein-1 in lungs of mice lacking ICAM-1...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29338488/macrophage-polarization-and-activation-at-the-interface-of-multi-walled-carbon-nanotube-induced-pulmonary-inflammation-and-fibrosis
#9
Jie Dong, Qiang Ma
Pulmonary exposure to carbon nanotubes (CNTs) induces fibrosing lesions in the lungs that manifest rapid-onset inflammatory and fibrotic responses, leading to chronic fibrosis in animals and health concerns in exposed humans. The mechanisms underlying CNT-induced fibrogenic effects remain undefined. Macrophages are known to play important roles in immune regulation and fibrosis development through their distinct subsets. Here we investigated macrophage polarization and activation in mouse lungs exposed to multi-walled CNTs (MWCNTs)...
January 16, 2018: Nanotoxicology
https://www.readbyqxmd.com/read/29337108/a-vascular-disrupting-agent-overcomes-tumor-multidrug-resistance-by-skewing-macrophage-polarity-toward-the-m1-phenotype
#10
Xueping Lei, Minfeng Chen, Xiaobo Li, Maohua Huang, Qiulin Nie, Nan Ma, Heru Chen, Nanhui Xu, Wencai Ye, Dongmei Zhang
Multidrug resistance (MDR) mediated by ATP-binding cassette (ABC) transporters is the major obstacle for chemotherapeutic success. Although attempts have been made to circumvent ABC transporter-mediated MDR in past decades, there is still no effective agent in clinic. Here, we identified a vascular disrupting agent, Z-GP-DAVLBH, that significantly inhibited the growth of multidrug-resistant human hepatoma HepG2/ADM and human breast cancer MCF-7/ADR tumor xenografts, although these cells were insensitive to Z-GP-DAVLBH in vitro...
January 11, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29331905/macrophage-phenotype-switch-by-sequential-action-of-immunomodulatory-cytokines-from-hydrogel-layers-on-titania-nanotubes
#11
Junhong Chen, Mengting Li, Congling Yang, Xianzhen Yin, Ke Duan, Jianxin Wang, Bo Feng
Inflammatory response occurring between tissues and implants after implantation has attracted increasing attention because it can cause local tissue necrosis and even implant failure. Macrophages play a key role in all stages of inflammation. Pro-inflammatory (M1) and anti-inflammatory (M2) macrophages comprise two main phenotypes and the switch from M1 to M2 at specific time points is important for wound healing and tissue regeneration. Therefore, we hypothesized that biomaterial systems capable of facilitating macrophage phenotype switching should attenuate inflammation and enhance healing...
January 9, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29330807/evaluation-of-macrophage-polarization-in-pancreatic-cancer-microenvironment-under-hypoxia
#12
Kuldeep S Attri, Kamiya Mehla, Pankaj K Singh
Hypoxic microenvironment found in pancreatic ductal adenocarcinoma and other solid tumors is central to physiological and metabolic alterations of immune cells that significantly impact tumor growth dynamics. Hypoxic adaptations in the immune cells are primarily mediated by the stabilization of hypoxia-inducible factor-1 alpha (HIF-1α), which regulates cellular metabolism by modulating glycolysis and other interconnected metabolic pathways. HIF-1α plays distinct roles in M1 and M2 macrophage polarization, which, in turn, regulates tumor cell immune escape and growth...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29327613/potential-immunotherapies-for-sarcoidosis
#13
Van Le, Elliott D Crouser
Sarcoidosis is a chronic granulomatous inflammatory disease that commonly causes lung disease, but can affect other vital organs and tissues. The cause of sarcoidosis is unknown, and current therapies are commonly limited by lack of efficacy, adverse side effects, and excessive cost. Areas covered: The manuscript will provide a review of current concepts relating to the pathogenesis of sarcoidosis, and how these disease mechanisms may be leveraged to develop more effective treatments for sarcoidosis. It provides only a brief summary of currently accepted therapy, while focusing more extensively on potential novel therapies...
January 12, 2018: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/29325905/infiltrating-macrophages-are-broadly-activated-at-the-early-stage-to-support-acute-skeletal-muscle-injury-repair
#14
Xingyu Wang, Wanming Zhao, Richard M Ransohoff, Lan Zhou
Acute skeletal muscle injury repair requires an adequate inflammatory response predominated by macrophage infiltration. We studied the activation of infiltrating macrophages by analyzing the expression of M1/M2 signature genes. Most of the intramuscular macrophages were Ly6Chi at day 1 after BaCl2 injection, while many were Ly6Clo at day 3. Ly6Chi macrophages at day 1 expressed a high level of both M1 and M2 genes, and the Ly6Chi and Ly6Clo macrophages at day 3 expressed a similar level of many M1/M2 genes...
January 4, 2018: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29324844/absence-of-myeloid-klf4-reduces-prostate-cancer-growth-with-pro-atherosclerotic-activation-of-tumor-myeloid-cells-and-infiltration-of-cd8-t-cells
#15
David J Barakat, Rahul Suresh, Theresa Barberi, Kenneth J Pienta, Brian W Simons, Alan D Friedman
The microenvironment of prostate cancer often includes abundant tumor-associated macrophages (TAMs), with their acquisition of an M2 phenotype correlating with local aggressiveness and metastasis. Tumor-derived M-CSF contributes to TAM M2 polarization, and M-CSF receptor inhibition slows prostate cancer growth in model systems. As additional cytokines can direct TAM M2 polarization, targeting downstream transcription factors could avoid resistance. Klf4 and C/EBPβ each contribute to monocyte development, and reduced expression of macrophage Klf4 or C/EBPβ favors their adoption of a pro-inflammatory M1 state...
2018: PloS One
https://www.readbyqxmd.com/read/29324807/vegf-may-contribute-to-macrophage-recruitment-and-m2-polarization-in-the-decidua
#16
Karen C Wheeler, Manoj K Jena, Bhola S Pradhan, Neha Nayak, Subhendu Das, Chaur-Dong Hsu, David S Wheeler, Kang Chen, Nihar R Nayak
It is increasingly evident that cytokines and growth factors produced in the decidua play a pivotal role in the regulation of the local immune microenvironment and the establishment of pregnancy. One of the major growth factors produced in the decidua is vascular endothelial growth factor (VEGF), which acts not only on endothelial cells, but also on multiple other cell types, including macrophages. We sought to determine whether decidua-derived VEGF affects macrophage recruitment and polarization using human endometrial/decidual tissue samples, primary human endometrial stromal cells (ESCs), and the human monocyte cell line THP1...
2018: PloS One
https://www.readbyqxmd.com/read/29321503/il-34-and-csf-1-display-an-equivalent-macrophage-differentiation-ability-but-a-different-polarization-potential
#17
Sonia Boulakirba, Anja Pfeifer, Rana Mhaidly, Sandrine Obba, Michael Goulard, Thomas Schmitt, Paul Chaintreuil, Anne Calleja, Nathan Furstoss, François Orange, Sandra Lacas-Gervais, Laurent Boyer, Sandrine Marchetti, Els Verhoeyen, Frederic Luciano, Guillaume Robert, Patrick Auberger, Arnaud Jacquel
CSF-1 and IL-34 share the CSF-1 receptor and no differences have been reported in the signaling pathways triggered by both ligands in human monocytes. IL-34 promotes the differentiation and survival of monocytes, macrophages and osteoclasts, as CSF-1 does. However, IL-34 binds other receptors, suggesting that differences exist in the effect of both cytokines. In the present study, we compared the differentiation and polarization abilities of human primary monocytes in response to CSF-1 or IL-34. CSF-1R engagement by one or the other ligands leads to AKT and caspase activation and autophagy induction through expression and activation of AMPK and ULK1...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321062/notch-signaling-triggered-via-the-ligand-dll4-impedes-m2-macrophage-differentiation-and-promotes-their-apoptosis
#18
Sylvain Pagie, Nathalie Gérard, Béatrice Charreau
BACKGROUND: Notch signaling controls many cellular processes, including cell fate determination, cell differentiation, proliferation and apoptosis. In mammals, four Notch receptors (Notch 1-4) can interact with five distinct ligands [Jagged1, Jagged2, Delta-like 1 (DLL1), DLL3, and DLL4]. We previously reported that Notch activation is modulated in endothelial cells and monocytes during inflammation and showed that inflammation upregulates DLL4 on endothelial cells. DLL4 promotes differentiation of blood monocytes into proinflammatory M1 macrophages...
January 10, 2018: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/29319160/macrophage-plasticity-polarization-and-function-in-health-and-disease
#19
REVIEW
Abbas Shapouri Moghaddam, Saeed Mohammadian, Hossein Vazini, Mahdi Taghadosi, Seyed-Alireza Esmaeili, Fatemeh Mardani, Bita Seifi, Asadollah Mohammadi, Jalil Tavakol Afshari, Amirhossein Sahebkar
Macrophages are heterogeneous and their phenotype and functions are regulated by the surrounding micro-environment. Macrophages commonly exist in two distinct subsets: 1) Classically activated or M1 macrophages, which are pro-inflammatory and polarized by lipopolysaccharide (LPS) either alone or in association with Th1 cytokines such as IFN-γ, GM-CSF and produce pro-inflammatory cytokines such as interleukin-1β (IL-1β), IL-6, IL-12, IL-23 and TNF-α, and 2) Alternatively activated or M2 macrophages, which are anti-inflammatory and immunoregulatory and polarized by Th2 cytokines such as IL-4 and IL-13 and produce anti-inflammatory cytokines such as IL-10 and TGF-β...
January 10, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29317502/macrophages-with-a-deletion-of-the-phosphoenolpyruvate-carboxykinase-1-pck1-gene-have-a-more-proinflammatory-phenotype
#20
Chih-Wei Ko, Daniel Counihan, Jing Wu, Maria Hatzoglou, Michelle A Puchowicz, Colleen M Croniger
Phosphoenolpyruvate carboxykinase (Pck1) is a metabolic enzyme that is integral to the gluconeogenic and glyceroneogenic pathway. However, the role of Pck1 in macrophage metabolism and function is unknown. Using stable isotopomer MS analysis in a mouse model with a myeloid cell specific Pck1 deletion, we show here that this deletion increases the proinflammatory phenotype in macrophages. Incubation of LPS-stimulated bone marrow derived macrophages (BMDM) with [U-13C] glucose revealed reduced [13C] labeling of citrate and malate and increased [13C] labeling of lactate in Pck1 deleted BMDMs...
January 9, 2018: Journal of Biological Chemistry
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