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https://www.readbyqxmd.com/read/28817687/morphologic-phenotypic-and-transcriptomic-characterization-of-classically-and-alternatively-activated-canine-blood-derived-macrophages-in-vitro
#1
Franziska Heinrich, Annika Lehmbecker, Barbara B Raddatz, Kristel Kegler, Andrea Tipold, Veronika M Stein, Arno Kalkuhl, Ulrich Deschl, Wolfgang Baumgärtner, Reiner Ulrich, Ingo Spitzbarth
Macrophages are a heterogeneous cell population playing a pivotal role in tissue homeostasis and inflammation, and their phenotype strongly depends on the micromilieu. Despite its increasing importance as a translational animal model for human diseases, there is a considerable gap of knowledge with respect to macrophage polarization in dogs. The present study comprehensively investigated the morphologic, phenotypic, and transcriptomic characteristics of unstimulated (M0), M1- (GM-CSF, LPS, IFNγ-stimulated) and M2- (M-CSF, IL-4-stimulated)-polarized canine blood-derived macrophages in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28814629/modular-tissue-engineering-for-the-vascularization-of-subcutaneously-transplanted-pancreatic-islets
#2
Alexander E Vlahos, Nicholas Cober, Michael V Sefton
The transplantation of pancreatic islets, following the Edmonton Protocol, is a promising treatment for type I diabetics. However, the need for multiple donors to achieve insulin independence reflects the large loss of islets that occurs when islets are infused into the portal vein. Finding a less hostile transplantation site that is both minimally invasive and able to support a large transplant volume is necessary to advance this approach. Although the s.c. site satisfies both these criteria, the site is poorly vascularized, precluding its utility...
August 16, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28800775/lack-of-high-bmi-related-features-in-adipocytes-and-inflammatory-cells-in-the-infrapatellar-fat-pad-ifp
#3
Anja J de Jong, Inge R Klein-Wieringa, Stefan N Andersen, Joanneke C Kwekkeboom, Linda Herb-van Toorn, Badelog J E de Lange-Brokaar, Danny van Delft, John Garcia, Wu Wei, Huub J L van der Heide, Yvonne M Bastiaansen-Jenniskens, Gerjo J V M van Osch, Annemarie M Zuurmond, Vedrana Stojanovic-Susulic, Rob G H H Nelissen, René E M Toes, Margreet Kloppenburg, Andreea Ioan-Facsinay
BACKGROUND: Obesity is associated with the development and progression of osteoarthritis (OA). Although the infrapatellar fat pad (IFP) could be involved in this association, due to its intracapsular localization in the knee joint, there is currently little known about the effect of obesity on the IFP. Therefore, we investigated cellular and molecular body mass index (BMI)-related features in the IFP of OA patients. METHODS: Patients with knee OA (N = 155, 68% women, mean age 65 years, mean (SD) BMI 29...
August 11, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28792700/alternatively-activated-macrophages-are-associated-with-prostate-volume-and-lower-urinary-tract-symptoms-severity-of-patients-with-benign-prostate-hyperplasia
#4
Wenxue Hu, Wei Liu, Feng Yu, Yanhua Wu, Xiaowu Fang, Wenke Hao
BACKGROUND: Recent studies show that alternatively activated macrophages (AAMs) are involved in tissue remodeling and fibrosis. However, the relationship between AAMs and the development of benign prostate hyperplasia (BPH) is unclear. The aim of this study is to investigate the correlation among AAMs, prostate volume, and lower urinary tract symptoms (LUTS) severity of benign prostate hyperplasia (BPH) patients. METHODS: Patients who underwent transurethral incision of the prostate (TUIP) for BPH were recruited and international prostatic symptom scores (IPSS) were assessed before the operations...
July 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28769058/characterisation-of-lung-macrophage-subpopulations-in-copd-patients-and-controls
#5
Jennifer A Dewhurst, Simon Lea, Elizabeth Hardaker, Josiah V Dungwa, Arjun K Ravi, Dave Singh
Lung macrophage subpopulations have been identified based on size. We investigated characteristics of small and large macrophages in the alveolar spaces and lung interstitium of COPD patients and controls. Alveolar and interstitial cells were isolated from lung resection tissue from 88 patients. Macrophage subpopulation cell-surface expression of immunological markers and phagocytic ability were assessed by flow cytometry. Inflammatory related gene expression was measured. Alveolar and interstitial macrophages had subpopulations of small and large macrophages based on size and granularity...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28761077/il-4-as-a-repurposed-biological-drug-for-myocardial-infarction-through-augmentation-of-reparative-cardiac-macrophages-proof-of-concept-data-in-mice
#6
Yusuke Shintani, Tomoya Ito, Laura Fields, Manabu Shiraishi, Yuki Ichihara, Nobuhiko Sato, Mihai Podaru, Satoshi Kainuma, Hiroyuki Tanaka, Ken Suzuki
Recent research has shown that reparative (alternatively activated or M2) macrophages play a role in repair of damaged tissues, including the infarcted hearts. Administration of IL-4 is known to augment M2 macrophages. This translational study thus aimed to investigate whether IL-4 administration is useful for the treatment of myocardial infarction. Long-acting IL-4 complex (IL-4c; recombinant IL-4 mixed with anti-IL-4 monoclonal antibody as a stabilizer) was administered after coronary artery ligation in mice...
July 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28756234/anti-tumor-necrosis-factor-with-a-glyco-engineered-fc-region-has-increased-efficacy-in-mice-with-colitis
#7
Felicia M Bloemendaal, Alon D Levin, Manon E Wildenberg, Pim J Koelink, Bradford L McRae, Jochen Salfeld, Jenifer Lum, Marijn van der Neut Kolfschoten, Jill W Claassens, Remco Visser, Arthur Bentlage, Geert R A M D'Haens, J Sjef Verbeek, Gestur Vidarsson, Gijs R van den Brink
BACKGROUND & AIMS: Although tumor necrosis factor (TNF) antagonists reduce many clinical features of inflammatory bowel disease (IBD), complete mucosal healing occurs in less than 50% of patients. The Fc region of monoclonal antibodies against TNF has immunosuppressive properties via effects on macrophage polarization. We examined the interaction between the anti-TNF Fc region and Fcγ receptors (FcγR), and whether the absence of the Fc core fucose (which increases binding to FcγRIIIa) increases the efficacy of anti-TNF in mice with colitis...
July 26, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28755749/increased-expression-of-m1-and-m2-phenotypic-markers-in-isolated-microglia-after-four-day-binge-alcohol-exposure-in-male-rats
#8
Hui Peng, Chelsea R Geil Nickell, Kevin Y Chen, Justin A McClain, Kimberly Nixon
Microglia activation and neuroinflammation are common features of neurodegenerative conditions, including alcohol use disorders (AUDs). When activated, microglia span a continuum of diverse phenotypes ranging from classically activated, pro-inflammatory (M1) microglia/macrophages to alternatively activated, growth-promoting (M2) microglia/macrophages. Identifying microglia phenotypes is critical for understanding the role of microglia in the pathogenesis of AUDs. Therefore, male rats were gavaged with 25% (w/v) ethanol or isocaloric control diet every 8 h for 4 days and sacrificed at 0, 2, 4, and 7 days after alcohol exposure (e...
August 2017: Alcohol
https://www.readbyqxmd.com/read/28750661/human-dental-pulp-pluripotent-like-stem-cells-promote-wound-healing-and-muscle-regeneration
#9
Ester Martínez-Sarrà, Sheyla Montori, Carlos Gil-Recio, Raquel Núñez-Toldrà, Domiziana Costamagna, Alessio Rotini, Maher Atari, Aernout Luttun, Maurilio Sampaolesi
BACKGROUND: Dental pulp represents an easily accessible autologous source of adult stem cells. A subset of these cells, named dental pulp pluripotent-like stem cells (DPPSC), shows high plasticity and can undergo multiple population doublings, making DPPSC an appealing tool for tissue repair or maintenance. METHODS: DPPSC were harvested from the dental pulp of third molars extracted from young patients. Growth factors released by DPPSC were analysed using antibody arrays...
July 27, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28739604/s1pr1-on-tumor-associated-macrophages-promotes-lymphangiogenesis-and-metastasis-via-nlrp3-il-1%C3%AE
#10
Benjamin Weichand, Rüdiger Popp, Sarah Dziumbla, Javier Mora, Elisabeth Strack, Eiman Elwakeel, Ann-Christin Frank, Klaus Scholich, Sandra Pierre, Shahzad N Syed, Catherine Olesch, Julia Ringleb, Bilge Ören, Claudia Döring, Rajkumar Savai, Michaela Jung, Andreas von Knethen, Bodo Levkau, Ingrid Fleming, Andreas Weigert, Bernhard Brüne
Metastasis is the primary cause of cancer death. The inflammatory tumor microenvironment contributes to metastasis, for instance, by recruiting blood and lymph vessels. Among tumor-infiltrating immune cells, tumor-associated macrophages (TAMs) take a center stage in promoting both tumor angiogenesis and metastatic spread. We found that genetic deletion of the S1P receptor 1 (S1pr1) alone in CD11b(hi) CD206(+) TAMs infiltrating mouse breast tumors prevents pulmonary metastasis and tumor lymphangiogenesis. Reduced lymphangiogenesis was also observed in the nonrelated methylcholanthrene-induced fibrosarcoma model...
July 24, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28739167/establishment-of-nf-%C3%AE%C2%BAb-sensing-and-interleukin-4-secreting-mesenchymal-stromal-cells-as-an-on-demand-drug-delivery-system-to-modulate-inflammation
#11
Tzuhua Lin, Jukka Pajarinen, Akira Nabeshima, Laura Lu, Karthik Nathan, Zhenyu Yao, Stuart B Goodman
Chronic inflammation is associated with up-regulation of the transcription factor nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and excessive inflammatory cytokine secretion by M1 macrophages. The anti-inflammatory cytokine interleukin (IL)-4 converts pro-inflammatory M1 macrophages into an anti-inflammatory and tissue-regenerative M2 phenotype, thus reducing inflammation and enhancing tissue regeneration. We have generated NF-κB responsive, or constitutively active IL-4 expression lentiviral vectors transduced into murine bone marrow-derived mesenchymal stromal cells (MSCs)...
July 21, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28733781/bitc-and-s-carvone-restrain-high-fat-diet-induced-obesity-and-ameliorate-hepatic-steatosis-and-insulin-resistance
#12
Sary Alsanea, Dexi Liu
PURPOSE: To investigate the preventative activity of benzyl isothiocyante and S-carvone against high-fat diet-induced obesity and metabolic complications. METHODS: Ten-week-old C57BL/6 male mice were fed a high-fat diet and injected intraperitoneally twice per week with benzyl isothiocyante, S-carvone, or vehicle for 8 weeks. The body weight, food intake, and body composition were monitored, and glucose tolerance and insulin tolerance tests were performed at the end of the experiment...
July 21, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28727998/enrichment-of-endogenous-fractalkine-and-anti-inflammatory-cells-via-aptamer-functionalized-hydrogels
#13
Syed Faaiz Enam, Jack R Krieger, Tarun Saxena, Brian E Watts, Claire E Olingy, Edward A Botchwey, Ravi V Bellamkonda
Early recruitment of non-classical monocytes and their macrophage derivatives is associated with augmented tissue repair and improved integration of biomaterial constructs. A promising therapeutic approach to recruit these subpopulations is by elevating local concentrations of chemoattractants such as fractalkine (FKN, CX3CL1). However, delivering recombinant or purified proteins is not ideal due to their short half-lives, suboptimal efficacy, immunogenic potential, batch variabilities, and cost. Here we report an approach to enrich endogenous FKN, obviating the need for delivery of exogenous proteins...
October 2017: Biomaterials
https://www.readbyqxmd.com/read/28722316/the-mincle-ligand-trehalose-dibehenate-differentially-modulates-m1-like-and-m2-like-macrophage-phenotype-and-function-via-syk-signaling
#14
Kristel Kodar, Jacquie L Harper, Melanie J McConnell, Mattie S M Timmer, Bridget L Stocker
INTRODUCTION: Macrophages play a significant role in the progression of diseases, such as cancer, making them a target for immune-modulating agents. Trehalose dibehenate (TDB) is known to activate M1-like macrophages via Mincle, however, the effect of TDB on M2-like macrophages, which are found in the tumor microenvironment, has not been studied. METHODS: qRT-PCR, flow cytometry, cytokine ELISA, and Western Blotting were used to study the effect of TDB on GM-CSF and M-CSF/IL-4 derived bone marrow macrophages (BMMs) from C57BL/6 and Mincle(-/-) mice...
July 19, 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28721450/smad3-and-bmal1-regulate-p21-and-s100a4-expression-in-myocardial-stromal-fibroblasts-via-tnf-%C3%AE
#15
Fuyuki Sato, Akira Kohsaka, Kana Takahashi, Saki Otao, Yusuke Kitada, Yoshiyuki Iwasaki, Yasuteru Muragaki
Bmal1, a clock gene, is associated with depression, hypertrophy, metabolic syndrome and diabetes. Smad3, which is involved in the TGF-β signaling pathway, plays an important role in the regulation of tumor progression, fibrosis, obesity and diabetes. Our previous report showed that Smad3 has circadian expression in mouse livers. In the current study, we focused on the heart, especially on the myocardial stromal fibroblasts because the roles of Bmal1 and Smad3 in this tissue are poorly understood. Bmal1 and Smad3 have circadian expression in mouse hearts, and their circadian expression patterns were similar...
July 18, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28717866/mir-30a-positively-regulates-the-inflammatory-response-of-microglia-in-experimental-autoimmune-encephalomyelitis
#16
Xue Fang, Dingya Sun, Zhihong Wang, Zhongwang Yu, Weili Liu, Yingyan Pu, Dan Wang, Aijun Huang, Mingdong Liu, Zhenghua Xiang, Cheng He, Li Cao
Multiple sclerosis (MS) is a classical inflammatory demyelinating disease of the central nervous system (CNS). Microglia are the main resident immune cells in the CNS and are closely associated with the pathogenesis of MS. In the present study, we found that miR-30a was highly expressed in jellyfish-like microglia in chronic active lesions of MS patients, as well as in the microglia of mice with experimental autoimmune encephalomyelitis (EAE) at the chronic phase. In vitro, the conditioned supernatant of mouse microglia overexpressing miR-30a promoted the apoptosis of oligodendrocyte precursor cells (OPCs), and inhibited OPC differentiation...
July 17, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28715505/the-clinical-and-immunological-performance-of-28-days-survival-model-of-cecal-ligation-and-puncture-in-humanized-mice
#17
Krzysztof Laudanski, Natalia Lapko, Mateusz Zawadka, Benjamin X Zhou, Gwenn Danet-Desnoyers, George S Worthen
Sepsis triggers a coordinated and thorough immune system response with long-term unfavorable sequelae after the initial insult. Long-term recovery from sepsis has garnered increasing attention recently, but a lack of suitable animal models impairs progress in this area. Our study, therefore, aimed to address the performance of the immune system in a survivable model of sepsis (cecal ligation and sepsis; CLP) for up to 28 d after the initial injury in humanized mice. Our model mimics human sepsis with weight loss and post-sepsis hypothermia...
2017: PloS One
https://www.readbyqxmd.com/read/28713327/il-2-anti-il-2-complex-attenuates-inflammation-and-bbb-disruption-in-mice-subjected-to-traumatic-brain-injury
#18
Weiwei Gao, Fei Li, Ziwei Zhou, Xin Xu, Yingang Wu, Shuai Zhou, Dongpei Yin, Dongdong Sun, Jianhua Xiong, Rongcai Jiang, Jianning Zhang
Traumatic brain injury (TBI) induces the excessive inflammation and disruption of blood-brain barrier, both of which are partially mediated by the activation of microglia and release of inflammatory cytokines. Previous reports showed that administration of regulatory T cells (Tregs) could suppress inflammation and promote neurological function recovery, and that the IL-2/anti-IL-2 complex (IL-2C) could increase the number of Tregs. Thus, we hypothesized that IL-2C-mediated expansion of Tregs would be beneficial in mice subjected to TBI...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28712928/bone-marrow-derived-mesenchymal-stem-cells-propagate-immunosuppressive-anti-inflammatory-macrophages-in-cell-to-cell-contact-independent-and-dependent-manners-under-hypoxic-culture
#19
Naoki Takizawa, Naoto Okubo, Masaharu Kamo, Naoyuki Chosa, Toshinari Mikami, Keita Suzuki, Seiji Yokota, Miho Ibi, Masato Ohtsuka, Masayuki Taira, Takashi Yaegashi, Akira Ishisaki, Seiko Kyakumoto
Immunosuppressive/anti-inflammatory macrophage (Mφ), M2-Mφ that expressed the typical M2-Mφs marker, CD206, and anti-inflammatory cytokine, interleukin (IL)-10, is beneficial and expected tool for the cytotherapy against inflammatory diseases. Here, we demonstrated that bone marrow-derived lineage-positive (Lin+) blood cells proliferated and differentiated into M2-Mφs by cooperation with the bone marrow-derived mesenchymal stem cells (MSCs) under hypoxic condition: MSCs not only promoted proliferation of undifferentiated M2-Mφs, pre-M2-Mφs, in the Lin+ fraction via a proliferative effect of the MSCs-secreted macrophage colony-stimulating factor, but also promoted M2-Mφ polarization of the pre-M2-Mφs through cell-to-cell contact with the pre-M2-Mφs...
July 14, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28709621/role-of-n-acetyl-galactosamine-4-so4-a-ligand-of-cd206-in-hsv-induced-mouse-model-of-beh%C3%A3-et-s-disease
#20
Bunsoon Choi, Hasan M Sayeed, S M Shamsul Islam, Seonghyang Sohn
CD206 is a macrophage mannose receptor involved in variety of autoimmune and inflammatory diseases. This study aimed to identify the pathogenic role of CD206 in a herpes simplex virus (HSV) induced Behçet's disease (BD) mouse model. CD206 positive cells were detected in peripheral blood mononuclear cells and quantified by flow cytometry. Levels of cytokines were measured by ELISA. CD206 was found to be down-regulated both in vitro (10(-6) M) and in vivo (200μg/mouse) after treatment with N-acetylgalactosamine (GalNAc), a ligand for CD206...
July 11, 2017: European Journal of Pharmacology
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