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macrophage polarization

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https://www.readbyqxmd.com/read/28092794/%C3%AE-defensin-3-modulates-macrophage-activation-and-orientation-during-acute-inflammatory-response-to-porphyromonas-gingivalis-lipopolysaccharide
#1
Jinglu Lyu, Tianying Bian, Bin Chen, Di Cui, Lili Li, Ling Gong, Fuhua Yan
β-defensin 3, a multifunctional antimicrobial peptide, has immuno-regulatory activities. We investigated the modulatory mechanism of human β-defensin 3 (hBD3) on acute inflammatory response resulted from Porphyromonas gingivalis lipopolysaccharide (P.g-LPS), which plays a pro-inflammatory role in periodontal infection and its derived systemic inflammation. P.g-LPS was administrated to mice and murine macrophages alone or along with hBD3. P.g-LPS could lead to acute inflammation as soon as 2h. And it was observed that hBD3 significantly decreased the production of pro-inflammatory biomarkers of in response to P...
January 13, 2017: Cytokine
https://www.readbyqxmd.com/read/28092793/high-dilutions-of-antimony-modulate-cytokines-production-and-macrophage-leishmania-l-amazonensis-interaction-in-vitro
#2
Fabiana Rodrigues de Santana, Luciane C Dalboni, Kátia F Nascimento, Fabiana Toshie Konno, Anuska M Alvares-Saraiva, Michelle S F Correia, Maristela Dutra Correa Bomfim, Renato C V Casarin, Elizabeth C Perez, Maria Anete Lallo, Giovani B Peres, Márcia Dalastra Laurenti, Nilson R Benites, Dorly F Buchi, Leoni Villano Bonamin
BACKGROUND: In previous results mice treated with high dilutions of antimony presented reduction of monocyte migration to the site of infection with increase in B lymphocytes population in the local lymph node. AIMS: To know the mechanisms involved, a series of in vitro studies was done, using co-cultures of macrophages (RAW 264.7) and Leishmania (L.) amazonensis treated with different dilutions of antimony (Antimonium crudum or AC), in different times. METHODOLOGY: Spreading, phagocytosis, the oxidative activity of macrophages, the viability of free promastigotes and the cytokines/chemokines concentration in the supernatant were evaluated...
January 13, 2017: Cytokine
https://www.readbyqxmd.com/read/28090688/exosomal-mir-146a-contributes-to-the-enhanced-therapeutic-efficacy-of-il-1%C3%AE-primed-mesenchymal-stem-cells-against-sepsis
#3
Yuxian Song, Huan Dou, Xiujun Li, Xiaoyin Zhao, Yi Li, Dan Liu, Jianjian Ji, Fei Liu, Liang Ding, Yanhong Ni, Yayi Hou
Improving the immunomodulatory efficacy of mesenchymal stem cells (MSCs) through pretreatment with pro-inflammatory cytokines is an evolving field of investigation. However, the underlying mechanisms have not been fully clarified. Here, we pretreated human umbilical cord-derived MSCs with interleukin-1β (IL-1β) and evaluated their therapeutic effects in a cecal ligation and puncture (CLP)-induced sepsis model. We found that systemic administration of IL-1β-pretreated MSCs (βMSCs) ameliorated the symptoms of murine sepsis more effectively and increased the survival rate compared with naïve MSCs...
January 16, 2017: Stem Cells
https://www.readbyqxmd.com/read/28090670/an-endoplasmic-reticulum-protein-nogo-b-facilitates-alcoholic-liver-disease-through-regulation-of-kupffer-cell-polarization
#4
Jin-Kyu Park, Mingjie Shao, Moon Young Kim, Soon Koo Baik, Mee Yon Cho, Teruo Utsumi, Ayano Satoh, Xinsho Ouyang, Chuhan Chung, Yasuko Iwakiri
Background Nogo-B (Reticulon 4B) is an endoplasmic reticulum (ER) resident protein that regulates ER structure and function. Since ER stress is known to induce M2 macrophage polarization, we examined whether Nogo-B regulates M1/M2 polarization of Kupffer cells and alters the pathogenesis of alcoholic liver disease (ALD). Methods M1 and M2 phenotypes were assessed in relation to Nogo-B expression and disease severity in liver specimens from ALD patients (NCT01875211). Liver specimens from wild-type (WT) and Nogo-B knockout (KO) mice fed control or Lieber-DeCarli ethanol liquid diet (5% ethanol) for 6 weeks were analyzed for liver injury and steatosis...
January 16, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28090562/hepatitis-c-virus-induced-monocyte-differentiation-into-polarized-m2-macrophages-promotes-stellate-cell-activation-via%C3%A2-tgf-%C3%AE
#5
Banishree Saha, Karen Kodys, Gyongyi Szabo
BACKGROUND & AIMS: Monocyte and macrophage (MΦ) activation contributes to the pathogenesis of chronic hepatitis C virus (HCV) infection. Disease pathogenesis is regulated by both liver-resident MΦs and monocytes recruited as precursors of MΦs into the damaged liver. Monocytes differentiate into M1 (classic/proinflammatory) or M2 (alternative/anti-inflammatory) polarized MΦs in response to tissue microenvironment. We hypothesized that HCV-infected hepatoma cells (infected with Japanese fulminant hepatitis-1 [Huh7...
May 2016: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28089340/activation-of-nk-cell-cytotoxicity-by-aerosolized-cpg-odn-poly-i-c-against-lung-melanoma-metastases-is-mediated-by-alveolar-macrophages
#6
Michele Sommariva, Valentino Le Noci, Chiara Storti, Francesca Bianchi, Elda Tagliabue, Andrea Balsari, Lucia Sfondrini
Controversies remain about NK cells direct responsiveness to Toll-like receptor (TLR) agonists or dependence on macrophages. In a melanoma lung metastasis model, aerosolized TLR9 and TLR3 agonists have been reported to induce antitumor immunity through NK cells activation. In the current study, we demonstrated that in vitro TLR9/TLR3 stimulation induced IFN-γ secretion by NK cells, but an increase in their cytotoxicity was detected only after NK cells co-culture with in vitro TLR9/TLR3 agonists pretreated alveolar macrophages...
January 5, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28087471/il-6-promotes-m2-macrophage-polarization-by-modulating-purinergic-signaling-and-regulates-the-lethal-release-of-nitric-oxide-during-trypanosoma-cruzi-infection
#7
Liliana M Sanmarco, Nicolás E Ponce, Laura M Visconti, Natalia Eberhardt, Martin G Theumer, Ángel R Minguez, Maria P Aoki
The production of nitric oxide (NO) is a key defense mechanism against intracellular pathogens but it must be tightly controlled in order to avoid excessive detrimental oxidative stress. In this study we described a novel mechanism through which interleukin (IL)-6 mediates the regulation of NO release induced in response to Trypanosoma cruzi infection. Using a murine model of Chagas disease, we found that, in contrast to C57BL/6 wild type (WT) mice, IL-6-deficient (IL6KO) mice exhibited a dramatic increase in plasma NO levels concomitant with a significantly higher amount of circulating IL-1β and inflammatory monocytes...
January 10, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28081294/xenogeneic-bio-root-prompts-the-constructive-process-characterized-by-macrophage-phenotype-polarization-in-rodents-and-nonhuman-primates
#8
Hui Li, Jingjing Sun, Jie Li, Hefeng Yang, Xiangyou Luo, Jinlong Chen, Li Xie, Fangjun Huo, Tian Zhu, Weihua Guo, Weidong Tian
Tissue or organ regeneration using xenogeneic matrices is a promising approach to address the shortage of donor matrices for allotransplantation. Success of such approach has been demonstrated to correlate with macrophage-mediated fibrotic homeostasis and tissue remodeling. The previous studies have demonstrated that treated dentin matrix (TDM) could be a suitable bioactive substrate for allogeneic tooth root regeneration. This study constructed xenogeneic bioengineered tooth root (bio-root) via a combination of porcine TDM (pTDM) with allogeneic dental follicle cells (DFCs)...
January 12, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28081243/the-prognostic-and-clinicopathological-significance-of-tumor-associated-macrophages-in-patients-with-gastric-cancer-a-meta-analysis
#9
Songcheng Yin, Jinyu Huang, Zhan Li, Junyan Zhang, Jiazi Luo, Chunyang Lu, Hao Xu, Huimian Xu
OBJECTIVE: Comprehensive studies have investigated the prognostic and clinicopathological value of tumor-associated macrophages (TAMs) in gastric cancer patients, yet results remain controversial. Therefore, we performed a meta-analysis to clarify this issue. METHODS: PubMed, Embase, and the Cochrane Library databases were searched to identify eligible studies. We extracted hazard ratios (HRs) and odds ratios (ORs) with their corresponding 95% confidence intervals (95% CIs) to estimate the effect sizes...
2017: PloS One
https://www.readbyqxmd.com/read/28079296/elasticity-in-macrophage-synthesized-biocrystals
#10
Elizabeth M Horstman, Rahul K Keswani, Benjamin A Frey, Phillip M Rzeczycki, Vernon LaLone, Jeffery A Bertke, Paul J A Kenis, Gus R Rosania
Supramolecular crystalline assembly constitutes a rational approach to bioengineer intracellular structures. Here, biocrystals of clofazimine (CFZ) that form in vivo within macrophages were measured to have marked curvature. Isolated crystals, however, showed reduced curvature suggesting that intracellular forces bend these drug crystals. Consistent with the ability of biocrystals to elastically deform, the inherent crystal structure of the principal molecular component of the biocrystals-the hydrochloride salt of CFZ (CFZ-HCl)-has a corrugated packing along the (001) face and weak dispersive bonding in multiple directions...
January 12, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28075448/microarray-analysis-of-circular-rna-expression-patterns-in-polarized-macrophages
#11
Yingying Zhang, Yao Zhang, Xueqin Li, Mengying Zhang, Kun Lv
Circular RNAs (circRNAs) are generated from diverse genomic locations and are a new player in the regulation of post-transcriptional gene expression. Recent studies have revealed that circRNAs play a crucial role in fine-tuning the level of microRNA (miRNA)-mediated regulation of gene expression by sequestering miRNAs. The interaction of circRNAs with disease-associated miRNAs suggests that circRNAs are important in the pathology of disease. However, the effects and roles of circRNAs in macrophage polarization have yet to be explored...
January 11, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28070458/characterization-of-adipose-tissue-macrophages-and-adipose-derived-stem-cells-in-critical-wounds
#12
Bong-Sung Kim, Pathricia V Tilstam, Katrin Springenberg-Jung, Arne Hendrick Boecker, Corinna Schmitz, Daniel Heinrichs, Soo Seok Hwang, Jan Philipp Stromps, Bergita Ganse, Ruedger Kopp, Matthias Knobe, Juergen Bernhagen, Norbert Pallua, Richard Bucala
BACKGROUND: Subcutaneous adipose tissue is a rich source of adipose tissue macrophages and adipose-derived stem cells which both play a key role in wound repair. While macrophages can be divided into the classically-activated M1 and the alternatively-activated M2 phenotype, ASCs are characterized by the expression of specific stem cell markers. METHODS: In the present study, we have investigated the expression of common macrophage polarization and stem cell markers in acutely inflamed adipose tissue...
2017: PeerJ
https://www.readbyqxmd.com/read/28067413/echinacea-purpurea-extract-polarizes-m1-macrophages-in-murine-bone-marrow-derived-macrophages-through-the-activation-of-jnk
#13
Aikun Fu, Yang Wang, Yanping Wu, Hongliang Chen, Shasha Zheng, Yali Li, Xin Xu, Weifen Li
Echinacea purpurea is an indigenous North American purple cone flower used by North Americans for treatment of various infectious diseases and wounds. This study investigated the effect of polysaccharide enriched extract of Echinacea purpurea (EE) on the polarization of macrophages. The results showed that 100 µg/mL of EE could markedly activate the macrophage by increasing the expression of CD80, CD86, and MHCII molecules. Meanwhile, EE upregulated the markers of classically activated macrophages (M1) such as CCR7 and the production of IL-1β, IL-6, IL-12p70, TNF-αand NO...
January 9, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28066964/mechanisms-of-the-prevention-and-inhibition-of-the-progression-and-development-of-nash-by-genetic-and-pharmacological-dcr3-supplementation
#14
Pei-Chang Lee, Ling-Yu Yang, Ying-Wen Wang, Shiang-Fen Huang, Kuei-Chuan Lee, Yun-Cheng Hsieh, Ying-Ying Yang, Shie-Liang Hsieh, Ming-Chih Hou, Han-Chieh Lin, Fa-Yuah Lee, Shou-Dong Lee
AIMS: Treatment to non-alcoholic steatohepatitis (NASH) is difficult due to the absence of a proven treatment and its comprehensive mechanisms. In the NASH animal model, up-regulated hepatic inflammation and oxidative stress with the resultant M1 polarization of macrophage as well as the imbalanced adipocytokines all accelerate NASH progression. As a member of TNF receptor superfamily, decoy receptor 3 (DcR3) not only neutralizes the death ligands, but also performs immune modulations...
January 8, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28065861/targeting-and-modulating-infarct-macrophages-with-hemin-formulated-in-designed-lipid-based-particles-improves-cardiac-remodeling-and-function
#15
Tamar Ben-Mordechai, David Kain, Radka Holbova, Natalie Landa, La-Paz Levin, Inbar Elron-Gross, Yifat Glucksam-Galnoy, Micha S Feinberg, Rimona Margalit, Jonathan Leor
Uncontrolled activation of pro-inflammatory macrophages after myocardial infarction (MI) accelerates adverse left ventricular (LV) remodeling and dysfunction. Hemin, an iron-containing porphyrin, activates heme oxygenase-1 (HO-1), an enzyme with anti-inflammatory and cytoprotective properties. We sought to determine the effects of hemin formulated in a macrophage-targeted lipid-based carrier (denoted HA-LP) on LV remodeling and function after MI. Hemin encapsulation efficiency was ~100% at therapeutic dose levels...
January 5, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28064070/maspin-inhibits-macrophage-phagocytosis-and-enhances-inflammatory-cytokine-production-via-activation-of-nf-%C3%AE%C2%BAb-signaling
#16
Yimeng Wang, Luguo Sun, Zhenbo Song, Danfeng Wang, Yongli Bao, Yuxin Li
Maspin (mammary serine protease inhibitor) is a non-inhibitory member of the serine protease inhibitor superfamily and a tumor suppressor in several cancers due to its ability to inhibit cell invasion, angiogenesis, and promote apoptosis. However, its immunomodulatory function remains largely unexplored. Thus, we explored the potential link between Maspin and macrophage function, first evaluating the regulatory effects of conditioned medium (CM) of a Maspin-overexpressing CHO cell strain on mouse peritoneal macrophage phagocytosis and cytokine secretion...
January 5, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28062499/role-of-kca3-1-channels-in-macrophage-polarization-and-its-relevance-in-atherosclerotic-plaque-instability
#17
Rende Xu, Chenguang Li, Yizhe Wu, Li Shen, Jianying Ma, Juying Qian, Junbo Ge
OBJECTIVE: Emerging evidence indicates that proinflammatory macrophage polarization imbalance plays a key role in atherosclerotic plaque progression and instability. The calcium-activated potassium channel KCa3.1 is critically involved in macrophage activation and function. However, the role of KCa3.1 in macrophage polarization is unknown. This study investigates the potential role of KCa3.1 in transcriptional regulation in macrophage polarization and its relationship to plaque instability...
December 29, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28059602/sumoylation-of-klf4-promotes-il-4-induced-macrophage-m2-polarization
#18
Kezhou Wang, Wei Zhou, Qi Cai, Jinke Cheng, Rong Cai, Rong Xing
Macrophages, in response to different environmental cues, undergo the classical polarization (M1 macrophages) as well as the alternative polarization (M2 macrophages) that involve the functions of stimulus-specific transcription factors. Kruppel-like factor 4 (KLF4), a member of a subfamily of the zinc-finger class of DNA-binding transcription factors, plays as a critical regulator of macrophage polarization. KLF4 has been reported as a SUMOylated protein. In this study, we showed that SUMOylation of KLF4, is induced by IL-4 treatment in macrophages...
January 6, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28059416/macroporous-resin-purification-and-characterization-of-flavonoids-from-platycladus-orientalis-l-franco-and-their-effects-on-macrophage-inflammatory-response
#19
Jiaoyan Ren, Yamei Zheng, Zehua Lin, Xin Han, Wenzhen Liao
The flavonoids (POFs) from the leaves of Platycladus orientalis (L.) Franco were purified using six different macroporous adsorption resins including polar resins NKA-9 and ADS-F8, semi-polar resins ADS-17 and AB-8, and non-polar resins D101 and ADS-5. Among semi-polar resins, AB-8 demonstrated the best adsorption and desorption capacities with an adsorption ratio of 86% and a desorption ratio of 52%. According to the Simultaneous Thermogravimetry-Differential Scanning Calorimetry (STA/TG-DSC) analysis, POFs showed three thermally decomposed temperatures (347...
January 6, 2017: Food & Function
https://www.readbyqxmd.com/read/28059035/the-sdldl-reduces-mrc1-expression-level-and-secretion-of-histamine-in-differentiated-m2-macrophages-from-patients-with-coronary-artery-stenosis
#20
Ameneh Yarnazari, Mohammad Najafi, Parisa Hassanpour, Syed Reza Hosseini-Fard, Abdollah Amirfarhangi
The macrophage polarization is proposed to be involved in initial events and remodeling of atherosclerosis plaques. Mannose receptor, C type 1 (MRC1) is a trans-membrane glycoprotein participating in phagocytosis and, is highly expressed in the M2 macrophages. The aim of this study was to investigate the effects of sdLDL (small dense LDL) on the MRC1 gene expression level and secretion of histamine in the differentiated M2 macrophages from monocytes of patients with coronary artery stenosis and healthy subjects...
January 5, 2017: Cardiovascular & Hematological Disorders Drug Targets
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