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Polarized macrophages

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https://www.readbyqxmd.com/read/29238041/foxo1-is-a-regulator-of-mhc-ii-expression-and-anti-tumor-effect-of-tumor-associated-macrophages
#1
Jing-Bo Yang, Zhi-Bin Zhao, Qing-Zhi Liu, Tai-Dou Hu, Jie Long, Kai Yan, Zhe-Xiong Lian
Macrophages are a critical component in host immune responses against tumor. In this work we investigated the role of forkhead box O1 (FoxO1) in the transcriptional regulation in macrophages, which affects the anti-tumor functions of tumor-associated macrophages (TAMs). First, we showed that TAMs expressed reduced levels of FoxO1, which was associated with their protumoral M2 polarization state. The suppression of FoxO1 expression in TAM was induced by the hypoxic condition in the tumor microenviroment. Next, we confirmed that FoxO1 positively regulates MHC-II genes by binding to the promoter region of Ciita gene, the master activator of multiple MHC-II genes...
December 14, 2017: Oncogene
https://www.readbyqxmd.com/read/29238011/plaque-calcification-during-atherosclerosis-progression-and-regression
#2
Atsushi Shioi, Yuji Ikari
Plaque calcification develops by the inflammation-dependent mechanisms involved in progression and regression of atherosclerosis. Macrophages can undergo two distinct polarization states, that is, pro-inflammatory M1 phenotype in progression and anti-inflammatory M2 phenotype in regression. In plaque progression, predominant M1 macrophages promote the initial calcium deposition within the necrotic core of the lesions, called as microcalcification, through not only vesicle-mediated mineralization as the result of apoptosis of macrophages and vascular smooth muscle cells (VSMCs), but also VSMC differentiation into early phase osteoblasts...
December 12, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/29237352/influence-of-patterned-titanium-coatings-on-polarization-of-macrophage-and-osteogenic-differentiation-of-bone-marrow-stem-cells
#3
Zequan Zhang, Youtao Xie, Houhua Pan, Liping Huang, Xuebin Zheng
Biomaterial surface topography plays a vital role in the osteointegration of implants by regulating the early cell responses and tissue growth-in. However, most of the previous researches focused on the effects of osteogenic cells, only a little is known about the immune cells which dominate osteogenesis after implanting. In this paper, patterned titanium coatings were fabricated and the effects of surface topography on the macrophage behaviors were investigated. On patterned titanium surface, macrophages preferred to polarize to M2, while macrophages on traditional titanium coatings presented higher M1 polarization...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29234825/bindarit-attenuates-pain-and-cancer-related-inflammation-by-influencing-myeloid-cells-in-a-model-of-bone-cancer
#4
Shenghou Liu, Hongwei Gao, Chunzheng Gao, Wenguang Liu, Deguo Xing
C-C motif chemokine ligand 2 (CCL2) is a small cytokine that functions in inflammation and cancer development. Bindarit, a CCL2 inhibitor, is a small anti-inflammatory molecule proven safe by phase II trials in type 2 diabetic nephropathy patients. As cancer-related inflammation is a cause of pain, we investigated whether Bindarit suppresses cancer-related inflammation and pain. We established a bone-cancer mouse model by inoculating cancer cells. After applying Bindarit, we preformed pain sensitivity tests and checked cancer development by X-ray...
December 12, 2017: Archivum Immunologiae et Therapiae Experimentalis
https://www.readbyqxmd.com/read/29232822/microglia-m2a-polarization-as-potential-link-between-food-allergy-and-autism-spectrum-disorders
#5
REVIEW
Hans O Kalkman, Dominik Feuerbach
Atopic diseases are frequently co-morbid with autism spectrum disorders (ASD). Allergic responses are associated with an activation of mast cells, innate lymphoid cells, and Th2 cells. These cells produce type-2 cytokines (IL4 and IL13), which stimulate microglia and macrophages to adopt a phenotype referred to as 'alternative activation' or 'M2A'. M2A-polarized macrophages and microglia play a physiological role in tissue repair by secreting growth factors such as brain-derived neurotrophic factor (BDNF) and insulin-like growth factor-1...
December 9, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/29230805/uspio-labeling-in-m1-and-m2-polarized-macrophages-an-in-vitro-study-using-a-clinical-magnetic-resonance-scanner
#6
Chiara Zini, Mary Anna Venneri, Selenia Miglietta, Damiano Caruso, Natale Porta, Andrea Isidori, Daniela Fiore, Daniele Gianfrilli, Vincenzo Petrozza, Andrea Laghi
BACKGROUND: To evaluate USPIO labeling in different macrophage populations using a clinical 3.0T MR unit with optical and electron microscopy as the gold standard. METHODS: Human monocytic cell line were differentiated into macrophages. Afterwards M0 macrophages were incubated with IL-4 and IL-13 in order to obtain M2 polarized macrophages or with IFN-gamma and LPS for classical macrophage activation (M1). These groups were incubated with USPIO MR contrast agent (P904) for 36 hours; M0, M0+P904, M1+P904 and M2+P904 were analyzed in gel phantoms with a 3...
December 12, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29230038/the-lps-inducible-lncrna-mirt2-is-a-negative-regulator-of-inflammation
#7
Meng Du, Lin Yuan, Xin Tan, Dandan Huang, Xiaojing Wang, Zhe Zheng, Xiaoxiang Mao, Xiangrao Li, Liu Yang, Kun Huang, Fengxiao Zhang, Yan Wang, Xi Luo, Dan Huang, Kai Huang
Toll-like receptors (TLRs) are a family of pattern recognition receptors (PRR) with a crucial function in innate immune responses. Activation of TLR4 signaling at the plasma membrane by lipopolysaccharide (LPS) stimulates proinflammatory signaling pathways dependent on the E3 ubiquitin ligase TRAF6. Here we show the LPS-induced long non-coding RNA (lncRNA) Mirt2 functions as a checkpoint to prevent aberrant activation of inflammation, and is a potential regulator of macrophage polarization. Mirt2 associates with, and attenuates Lys63 (K63)-linked ubiquitination of, TRAF6, thus inhibiting activation of NF-κB and MAPK pathways and limiting production of proinflammatory cytokines...
December 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/29229734/macrophage-polarization-alters-post-phagocytosis-survivability-of-the-commensal-streptococcus-gordonii
#8
Andrew J Croft, Sarah Metcalfe, Kiyonobu Honma, Jason G Kay
Oral streptococci are generally considered commensal organisms; however, they are becoming recognized as important associate pathogens during the development of periodontal disease as well as being associated with several systemic diseases, including as a causative agent of infective endocarditis. An important virulence determinant of these bacteria is an ability to evade destruction by phagocytic cells, yet how this subversion occurs is mostly unknown. Using Streptococcus gordonii as a model commensal oral streptococcus that is also associated with disease, we find resistance to reactive oxygen species (ROS) with an active ability to damage phagosomes allows the bacterium to avoid destruction within macrophages...
December 11, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/29227538/abberent-expression-of-nor1-protein-in-tumor-associated-macrophages-contributes-to-the-development-of-den-induced-hepatocellular-carcinoma
#9
Shengnan Chen, Pan Zheng, Wei Wang, Mei Yi, Pan Chen, Jing Cai, Junjun Li, Qian Peng, Yuanyuan Ban, Ying Zhou, Zhaoyang Zeng, Xiaoling Li, Wei Xiong, Guiyuan Li, Bo Xiang
Hepatocellular carcinoma (HCC) is the most common primary tumor of the liver and the sixth most common lethal cancer worldwide. Recent evidences demonstrated that oxidored nitro domain containing protein 1(NOR1), a putative tumor suppressor gene, is overexpressed in human HCC tissues. However, the role of NOR1 in HCC development remains unclear. Here, we described that NOR1 protein level is elevated in HCC and is associated with poorer clinical outcome. However, ecotopic overexpression of NOR1 protein in human HCC cell line HepG2 cells had no effect on cells proliferation, migration and clonality...
December 11, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29225184/control-of-polarization-and-tumoricidal-activity-of-macrophages-by-multicellular-spheroid-formation
#10
Yutaro Tanaka, Makiya Nishikawa, Yuya Mizukami, Kosuke Kusamori, Yuka Ogino, Shunsuke Nishimura, Kazunori Shimizu, Satoshi Konishi, Yuki Takahashi, Yoshinobu Takakura
Immune cell-based therapy is a promising approach for cancer immunotherapy. Macrophages can be used for this purpose if their tumoricidal activity and viability are properly controlled. In the present study, we aimed to enhance these properties of macrophages by constructing uniformly sized multicellular spheroids. Mouse macrophage-like J774.1 cells were selected as model macrophages, and poly(N-isopropylacrylamide)-coated polydimethylsiloxane-based microwell plates with an approximate diameter of 750μm were used to prepare J774...
December 7, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29221142/d-4f-increases-microrna-124a-and-reduces-neuroinflammation-in-diabetic-stroke-rats
#11
Ruizhuo Ning, Poornima Venkat, Michael Chopp, Alex Zacharek, Tao Yan, Xu Cui, Don Seyfried, Jieli Chen
D-4F is an apolipoprotein-A1 mimetic peptide that promotes anti-inflammatory effects. MicroRNA-124 is the most abundant brain-specific microRNA and has anti-inflammatory effects. In this study, we investigated the therapeutic efficacy and mechanisms of D-4F treatment of stroke in type one diabetes mellitus (T1DM) rats. Male Wistar rats were induced with T1DM, subjected to embolic middle cerebral artery occlusion and treated with PBS or D-4F (1 mg/kg i.p.) at 2, 24 and 48 hours after stroke (n=8/group). A battery of function tests, brain blood barrier (BBB) integrity, white matter changes and microRNA expression were evaluated in vivo and in vitro...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29218246/angiopoietin-like-protein-2-facilitates-non-small-cell-lung-cancer-progression-by-promoting-the-polarization-of-m2-tumor-associated-macrophages
#12
Xiaojuan Wei, Siyue Nie, Hui Liu, Jingyu Sun, Jie Liu, Juan Li, Shuyan Li, Shuyun Wang, Shuyi Han, Jun Wang, Yuping Sun
The functional phenotypes (M1 and M2) of tumor-associated macrophages (TAMs) are influenced by the tumor microenvironment (TME) and contribute greatly to the development of non-small cell lung cancer (NSCLC). However, the molecular mechanisms for TAM polarization remain unclear. Angiopoietin-like protein 2 (Angptl2) is involved in tumor progression. In this study, Angptl2 expression was aberrantly increased in NSCLC cells and positively correlated with TAM infiltration, tumor size and poor patient survival...
2017: American Journal of Cancer Research
https://www.readbyqxmd.com/read/29217508/il-1%C3%AE-interleukin-1%C3%AE-and-tnf-%C3%AE-tumor-necrosis-factor-%C3%AE-impact-abdominal-aortic-aneurysm-formation-by-differential-effects-on-macrophage-polarization
#13
Rishi Batra, Melissa K Suh, Jeffrey S Carson, Matthew A Dale, Trevor M Meisinger, Matthew Fitzgerald, Patrick J Opperman, Jiangtao Luo, Iraklis I Pipinos, Wanfen Xiong, B Timothy Baxter
OBJECTIVE: Abdominal aortic aneurysms are inflammatory in nature and are associated with some risk factors that also lead to atherosclerotic occlusive disease, most notably smoking. The purpose of our study was to identify differential cytokine expression in patients with abdominal aortic aneurysm and those with atherosclerotic occlusive disease. Based on this analysis, we further explored and compared the mechanism of action of IL (interleukin)-1β versus TNF-α (tumor necrosis factor-α) in abdominal aortic aneurysm formation...
December 7, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29217193/regulation-of-inflammatory-gene-expression-in-macrophages-by-epithelial-stromal-interaction-1-epsti1
#14
Young-Hoon Kim, Jae-Rin Lee, Myong-Joon Hahn
Epithelial-stromal interaction 1 (EPSTI1) was first discovered as a gene induced in breast cancer epithelial cells by co-cultured stromal fibroblasts. There are many reports on the role of Epsti1 in cancer malignancy. Epsti1 is now well known in regulating cancer. Recently, the role of Epsti1 in the immune response has been reported; these reports suggest the role of Epsti1 in immune function, immune privilege, and autoimmune diseases. Furthermore, they show that Epsti1 is expressed in various types of immune cells...
December 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29216639/exendin-4-induces-bone-marrow-stromal-cells-migration-through-bone-marrow-derived-macrophages-polarization-via-pka-stat3-signaling-pathway
#15
Ning Wang, Jian Gao, Min Jia, Xue Ma, Zhanxiang Lei, Fei Da, Fei Yan, Huinan Zhang, Ying Zhou, Mingkai Li, Gonghao He, Jingru Meng, Xiaoxing Luo
BACKGROUND/AIMS: The synthesis and degradation processes involved in bone remodeling are critically regulated by osteoblasts and osteoclasts. The GLP-1 receptor agonist Exendin-4 is beneficial for osteoblast differentiation and increases the number of osteoblasts. METHODS: We constructed an ovariectomized model to evaluate the impact of Exendin-4 on bone formation in osteoporosis. A macrophage-depleted model was also created to investigate the effect of macrophages on bone formation...
December 6, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29216605/gluten-peptides-drive-healthy-and-celiac-monocytes-toward-an-m2-like-polarization
#16
Amelia Barilli, Federica Gaiani, Barbara Prandi, Martina Cirlini, Filippo Ingoglia, Rossana Visigalli, Bianca Maria Rotoli, Nicola de'Angelis, Stefano Sforza, Gian Luigi de'Angelis, Valeria Dall'Asta
Celiac disease (CD) is an immune-mediated enteropathy triggered by ingested gluten in genetically susceptible individuals and sustained by both adaptive and innate immune responses. Recent studies in murine macrophages demonstrated that the activation of arginase (ARG) metabolic pathway by gluten peptides contributes to the modulation of intestinal permeability in vitro. Here we characterize the effects of gluten on arginine metabolism and cell polarization in human monocytes from both healthy and CD subjects; both a simplified enzymatic digestion of gliadin and a physiological digestion of whole wheat have been tested...
November 5, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29212557/preconditioning-of-murine-mesenchymal-stem-cells-synergistically-enhanced-immunomodulation-and-osteogenesis
#17
Tzuhua Lin, Jukka Pajarinen, Akira Nabeshima, Laura Lu, Karthik Nathan, Eemeli Jämsen, Zhenyu Yao, Stuart B Goodman
BACKGROUND: Mesenchymal stem cells (MSCs) are capable of immunomodulation and tissue regeneration, highlighting their potential translational application for treating inflammatory bone disorders. MSC-mediated immunomodulation is regulated by proinflammatory cytokines and pathogen-associated molecular patterns such as lipopolysaccharide (LPS). Previous studies showed that MSCs exposed to interferon gamma (IFN-γ) and the proinflammatory cytokine tumor necrosis factor alpha (TNF-α) synergistically suppressed T-cell activation...
December 6, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29209828/regulation-of-immunometabolism-in-adipose-tissue
#18
REVIEW
Manju Kumari, Joerg Heeren, Ludger Scheja
Adipose tissue has emerged as a major player in driving obesity-related inflammatory response. In obesity, chronic infiltration of macrophages in adipose tissue mediates local and systemic inflammation and acts as a key contributor to insulin resistance. In the past few years, adipose tissue plasticity and remodeling capacity has been studied extensively to develop therapeutic targets to combat obesity and related metabolic dysfunction. Progress in understanding the potential of adipocytes and contribution of macrophages and other immune cells to control immunometabolism in disease state has provided us new potential intervention targets to explore such as the formation of heat-producing beige adipocytes in white adipose tissue and the polarization of macrophages from an inflammatory toward an anti-inflammatory phenotype...
December 5, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/29209331/sialic-acids-in-the-immune-response-during-sepsis
#19
REVIEW
Yan-Cun Liu, Mu-Ming Yu, Yan-Fen Chai, Song-Tao Shou
Sialic acid-binding immunoglobulin-type lectins (Siglecs) are a group of cell surface transmembrane receptors expressed on immune cells, and regulate immune balance in inflammatory diseases. Sepsis is a life-threatened inflammatory syndrome induced by infection, and the pathogenesis of sepsis includes immune dysregulation, inflammation, and coagulation disorder. Here, we reviewed the various roles acted by Siglecs family in the pathogenesis of sepsis. Siglec-1, Siglec-5, and Siglec-14 play bidirectional roles through modulation of inflammation and immunity...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29208929/the-choice-of-cryopreservation-method-affects-immune-compatibility-of-human-cardiovascular-matrices
#20
Maria Schneider, Christof Stamm, Kelvin G M Brockbank, Ulrich A Stock, Martina Seifert
Conventional frozen cryopreservation (CFC) is currently the gold standard for cardiovascular allograft preservation. However, inflammation and structural deterioration limit transplant durability. Ice-free cryopreservation (IFC) already demonstrated matrix structure preservation combined with attenuated immune responses. In this study, we aim to explore the mechanisms of this diminished immunogenicity in vitro. First, we characterized factors released by human aortic tissue after CFC and IFC. Secondly, we analyzed co-cultures with human peripheral blood mononuclear cells, purified monocytes, T cells and monocyte-derived macrophages to examine functional immune effects triggered by the tissue or released cues...
December 5, 2017: Scientific Reports
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