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https://www.readbyqxmd.com/read/27916728/differential-response-to-intrahippocampal-interleukin-4-interleukin-13-in-aged-and-exercise-mice
#1
Alyssa Littlefield, Rachel A Kohman
Normal aging is associated with low-grade neuroinflammation that results from age-related priming of microglial cells. Further, aging alters the response to several anti-inflammatory factors, including interleukin (IL)-4 and IL-13. One intervention that has been shown to modulate microglia activation in the aged brain, both basally and following an immune challenge, is exercise. However, whether engaging in exercise can improve responsiveness to anti-inflammatory cytokines is presently unknown. The current study evaluated whether prior exercise training increases sensitivity to anti-inflammatory cytokines that promote the M2 (alternative) microglia phenotype in adult (5-month-old) and aged (23-month-old) C57BL/6J mice...
December 1, 2016: Neuroscience
https://www.readbyqxmd.com/read/27911817/tnf%C3%AE-stimulated-gene-6-tsg6-activates-macrophage-phenotype-transition-to-prevent-inflammatory-lung-injury
#2
Manish Mittal, Chinnaswamy Tiruppathi, Saroj Nepal, You-Yang Zhao, Dagmara Grzych, Dheeraj Soni, Darwin J Prockop, Asrar B Malik
TNFα-stimulated gene-6 (TSG6), a 30-kDa protein generated by activated macrophages, modulates inflammation; however, its mechanism of action and role in the activation of macrophages are not fully understood. Here we observed markedly augmented LPS-induced inflammatory lung injury and mortality in TSG6(-/-) mice compared with WT (TSG6(+/+)) mice. Treatment of mice with intratracheal instillation of TSG6 prevented LPS-induced lung injury and neutrophil sequestration, and increased survival in mice. We found that TSG6 inhibited the association of TLR4 with MyD88, thereby suppressing NF-κB activation...
November 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27909959/effects-of-anti-cd206-antibodies-on-macrophage-functions-in-male-cbf1-mice-with-lipidemia
#3
A P Lykov, T A Korolenko, L V Sakhno, O V Poveshchenko, N A Bondarenko, M A Surovtseva, N V Goncharova
The effects of anti-CD208 antibodies (mannose receptor) on functional characteristics of peritoneal macrophages were studied in intact mice and mice with lipidemia induced by poloxamer-407. Lipidemia was associated with suppression of phagocytosis and increase in spontaneous proliferative potential and NO production by macrophages. Anti-CD206 antibodies suppressed NO production by macrophages in mice with lipidemia.
December 1, 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27895532/cd163-macrophage-and-erythrocyte-contents-in-aspirated-deep-vein-thrombus-are-associated-with-the-time-after-onset-a-pilot-study
#4
Eiji Furukoji, Toshihiro Gi, Atsushi Yamashita, Sayaka Moriguchi-Goto, Mio Kojima, Chihiro Sugita, Tatefumi Sakae, Yuichiro Sato, Toshinori Hirai, Yujiro Asada
BACKGROUND: Thrombolytic therapy is effective in selected patients with deep vein thrombosis (DVT). Therefore, identification of a marker that reflects the age of thrombus is of particular concern. This pilot study aimed to identify a marker that reflects the time after onset in human aspirated DVT. METHODS: We histologically and immunohistochemically analyzed 16 aspirated thrombi. The times from onset to aspiration ranged from 5 to 60 days (median of 13 days)...
2016: Thrombosis Journal
https://www.readbyqxmd.com/read/27892502/mitochondrial-fat-oxidation-is-essential-for-lipid-induced-inflammation-in-skeletal-muscle-in-mice
#5
Jaycob D Warfel, Estrellita M Bermudez, Tamra M Mendoza, Sujoy Ghosh, Jingying Zhang, Carrie M Elks, Randall Mynatt, Bolormaa Vandanmagsar
Inflammation, lipotoxicity and mitochondrial dysfunction have been implicated in the pathogenesis of obesity-induced insulin resistance and type 2 diabetes. However, how these factors are intertwined in the development of obesity/insulin resistance remains unclear. Here, we examine the role of mitochondrial fat oxidation on lipid-induced inflammation in skeletal muscle. We used skeletal muscle-specific Cpt1b knockout mouse model where the inhibition of mitochondrial fatty acid oxidation results in accumulation of lipid metabolites in muscle and elevated circulating free fatty acids...
November 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27888718/characterization-of-peritoneal-leukemia-associated-macrophages-in-notch1-induced-mouse-t-cell-acute-lymphoblastic-leukemia
#6
Shayan Chen, Xiao Yang, Wenli Feng, Feifei Yang, Rong Wang, Chong Chen, Lina Wang, Yongmin Lin, Qian Ren, Guoguang Zheng
Macrophages, which have remarkable plasticity, are indispensable cellular components and play essential roles in both innate and adaptive immune responses. Peritoneal macrophages show unique gene expression profile and peritoneal cavity is also involved in leukemia. However, the characteristics of peritoneal leukemia-associated macrophages (Per LAMs) have not been established. Here we studied the phenotype of Per LAMs, their subpopulations in Notch1-induced acute lymphoblastic leukemia mice and compared with LAMs from BM or spleen in the same model...
November 23, 2016: Molecular Immunology
https://www.readbyqxmd.com/read/27865989/drug-delivery-across-intact-and-disrupted-skin-barrier-identification-of-cell-populations-interacting-with-penetrated-thermoresponsive-nanogels
#7
F Rancan, M Giulbudagian, J Jurisch, U Blume-Peytavi, M Calderón, A Vogt
Nanoscaled soft particles, such as nanogels, can be designed to incorporate different types of compounds and release them in a controlled and triggered manner. Thermoresponsive nanogels (tNG), releasing their cargo above a defined temperature, are promising carrier systems for inflammatory skin diseases, where the temperature of diseased skin differs from that of healthy skin areas. In this study a polyglycerol-based tNG with diameter of 156 nm was investigated for penetration and release properties upon topical application on ex vivo human skin with intact or disrupted barrier...
November 16, 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27864166/perivascular-adipose-tissue-inflammation-and-coronary-artery-disease-an-autopsy-study-protocol
#8
Daniela Souza Farias-Itao, Carlos Augusto Pasqualucci, Aline Nishizawa, Luiz Fernando Ferraz Silva, Fernanda Marinho Campos, Karen Cristina Souza da Silva, Renata Elaine Paraizo Leite, Lea Tenenholz Grinberg, Renata Eloah Lucena Ferretti-Rebustini, Wilson Jacob Filho, Claudia Kimie Suemoto
BACKGROUND: Perivascular adipose tissue (PAT) inflammation may have a role in coronary artery disease (CAD) pathophysiology. However, most evidence has come from samples obtained during surgical procedures that may imply in some limitations. Moreover, the role of B lymphocytes and inflammation in PAT that is adjacent to unstable atheroma plaques has not been investigated in humans using morphometric measurements. OBJECTIVE: The objective of this study is to investigate the inflammation in PAT, subcutaneous, and perirenal adipose tissues (SAT and PrAT) among chronic CAD, acute CAD, and control groups in an autopsy study...
November 18, 2016: JMIR Research Protocols
https://www.readbyqxmd.com/read/27863082/allogeneic-platelet-rich-plasma-affects-monocyte-differentiation-to-dendritic-cells-causing-an-anti-inflammatory-microenvironment-putatively-fostering-the-wound-healing
#9
Andrea Papait, Ranieri Cancedda, Maddalena Mastrogiacomo, Alessandro Poggi
Autologous platelet rich plasma (PRP) is clinically used to induce repair of different tissues through the release of bioactive molecules. In some patients, the production of an efficient autologous PRP is unfeasible due to their compromised health. We developed an allogeneic PRP mismatched for AB0 and Rh antigens. To broadcast its clinical applications avoiding side effects the outcome of allogeneic PRP on immune response should be defined. Thus, we investigated whether PRP affected the differentiation of peripheral blood monocytes to dendritic cells upon stimulation with granulocyte monocyte colony stimulating factor and interleukin-4...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27855848/transfusion-of-cd206-m2-macrophages-ameliorates-antibody-mediated-glomerulonephritis-in-mice
#10
Qiuna Du, Naotake Tsuboi, Yiqin Shi, Sachiko Ito, Yutaka Sugiyama, Kazuhiro Furuhashi, Nobuhide Endo, Hangsoo Kim, Takayuki Katsuno, Shin'ichi Akiyama, Seiichi Matsuo, Ken-Ichi Isobe, Shoichi Maruyama
Macrophages are multifunctional immune cells that may either drive or modulate disease pathogenesis, depending on the activated phenotype. In this study, we investigated the protective effects of CD206(+) M2 macrophages against nephrotoxic serum nephritis in mice. We found that these immunosuppressive macrophages, derived from bone marrow and stimulated with IL-4/IL-13 [CD206(+) M2 bone marrow-derived macrophages (M2BMMs)], protected against renal injury, decreased proteinuria, and diminished the infiltration of CD68(+) macrophages, neutrophils, and T cells into glomerular tissue...
December 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27853646/hepatocellular-carcinoma-is-accelerated-by-nash-involving-m2-macrophage-polarization-mediated-by-hif-1%C3%AE-induced-il-10
#11
Aditya Ambade, Abhishek Satishchandran, Banishree Saha, Benedek Gyongyosi, Patrick Lowe, Karen Kodys, Donna Catalano, Gyongyi Szabo
Obesity-related inflammation promotes cancer development. Tissue resident macrophages affect tumor progression and the tumor micro-environment favors polarization into alternatively activated macrophages (M2) that facilitate tumor invasiveness. Here, we dissected the role of western diet-induced NASH in inducing macrophage polarization in a carcinogen initiated model of hepatocellular carcinoma (HCC). Adult C57BL/6 male mice received diethyl nitrosamine (DEN) followed by 24 weeks of high fat-high cholesterol-high sugar diet (HF-HC-HSD)...
2016: Oncoimmunology
https://www.readbyqxmd.com/read/27846835/equine-dendritic-cells-generated-with-horse-serum-have-enhanced-functionality-in-comparison-to-dendritic-cells-generated-with-fetal-bovine-serum
#12
Anja Ziegler, Helen Everett, Eman Hamza, Mattia Garbani, Vinzenz Gerber, Eliane Marti, Falko Steinbach
BACKGROUND: Dendritic cells are professional antigen-presenting cells that play an essential role in the initiation and modulation of T cell responses. They have been studied widely for their potential clinical applications, but for clinical use to be successful, alternatives to xenogeneic substances like fetal bovine serum (FBS) in cell culture need to be found. Protocols for the generation of dendritic cells ex vivo from monocytes are well established for several species, including horses...
November 15, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27846260/alternatively-activated-m2-macrophage-phenotype-is-inducible-by-endothelin-1-in-cultured-human-macrophages
#13
Stefano Soldano, Carmen Pizzorni, Sabrina Paolino, Amelia Chiara Trombetta, Paola Montagna, Renata Brizzolara, Barbara Ruaro, Alberto Sulli, Maurizio Cutolo
BACKGROUND: Alternatively activated (M2) macrophages are phenotypically characterized by the expression of specific markers, mainly macrophage scavenger receptors (CD204 and CD163) and mannose receptor-1 (CD206), and participate in the fibrotic process by over-producing pro-fibrotic molecules, such as transforming growth factor-beta1 (TGFbeta1) and metalloproteinase (MMP)-9. Endothelin-1 (ET-1) is implicated in the fibrotic process, exerting its pro-fibrotic effects through the interaction with its receptors (ETA and ETB)...
2016: PloS One
https://www.readbyqxmd.com/read/27845069/mechanism-of-corilagin-interference-with-il-13-stat6-signaling-pathways-in-hepatic-alternative-activation-macrophages-in-schistosomiasis-induced-liver-fibrosis-in-mouse-model
#14
Peng Du, Qian Ma, Zhi-De Zhu, Gang Li, Yao Wang, Quan-Qiang Li, Yun-Fei Chen, Zhen-Zhong Shang, Juan Zhang, Lei Zhao
This study tried to find the mechanism of Corilagin interference with interleukin (IL)-13/signal transducer and activator of transcription (STAT) 6 signaling pathways in IL-13-activated liver alternative activation macrophages in schistosomiasis-induced liver fibrosis in Balb/c mice. As a result, IL-13 in serum and the mRNA expression of IL-13 Receptor α1, IL-4 Receptor α and downstream mediators supressor of cytokine signaling (SOCS) 1, Kruppel-like factor (KLF) 4, peroxisome proliferator-activated receptor (PPAR) δ in the liver tissue were significantly inhibited by Corilagin (P<0...
December 15, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27818280/gpvi-and-thromboxane-receptor-on-platelets-promote-proinflammatory-macrophage-phenotypes-during-cutaneous-inflammation
#15
Sandra Pierre, Bona Linke, Suo Jing, Neda Tarighi, Domenico Del Turco, Dominique Thomas, Nerea Ferreiros, David Stegner, Stefanie Frölich, Marco Sisignano, Sascha Meyer Dos Santos, Natasja deBruin, Rolf M Nüsing, Thomas Deller, Bernhard Nieswandt, Gerd Geisslinger, Klaus Scholich
Platelets are well known for their role in hemostasis but are also increasingly recognized for their supporting role in innate immune responses. Here, we studied the role of platelets in the development of peripheral inflammation and found that platelets colocalize with macrophages in the inflamed tissue outside of blood vessels in different animal models for cutaneous inflammation. In macrophages isolated from paws during zymosan-induced inflammation treatment with collagen-induced thromboxane synthesis through the platelet-expressed collagen receptor glycoprotein VI (GPVI)...
November 3, 2016: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/27807511/tumor-associated-macrophages-in-kidney-cancer
#16
REVIEW
Olga V Kovaleva, Daria V Samoilova, Maria S Shitova, Alexei Gratchev
Tumor associated macrophages (TAMs) are an important element of tumor stroma. They originate from blood monocytes attracted by chemokines and cytokines produced by tumor cells and, being instructed by tumor microenvironment, develop into potent tumor-supporting cell population. TAMs were demonstrated to directly stimulate tumor cell proliferation and to promote angiogenesis. Further TAMs provide for efficient immune escape by producing immunosuppressive cytokines and facilitate tumor dissemination by producing extracellular matrix remodeling enzymes...
2016: Analytical Cellular Pathology (Amsterdam)
https://www.readbyqxmd.com/read/27793054/cranial-irradiation-induces-transient-microglia-accumulation-followed-by-long-lasting-inflammation-and-loss-of-microglia
#17
Wei Han, Takashi Umekawa, Kai Zhou, Xing-Mei Zhang, Makiko Ohshima, Cecilia A Dominguez, Robert A Harris, Changlian Zhu, Klas Blomgren
The relative contribution of resident microglia and peripheral monocyte-derived macrophages in neuroinflammation after cranial irradiation is not known. A single dose of 8 Gy was administered to postnatal day 10 (juvenile) or 90 (adult) CX3CR1GFP/+ CCR2RFP/+ mouse brains. Microglia accumulated in the subgranular zone of the hippocampal granule cell layer, where progenitor cell death was prominent. The peak was earlier (6 h vs. 24 h) but less pronounced in adult brains. The increase in juvenile, but not adult, brains was partly attributed to proliferation...
October 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27783989/mfhas1-promotes-colorectal-cancer-progress-by-regulating-polarization-of-tumor-associated-macrophages-via-stat6-signaling-pathway
#18
Wankun Chen, Yajun Xu, Jing Zhong, Huihui Wang, Meilin Weng, Qian Cheng, Qichao Wu, Zhirong Sun, Hui Jiang, Minmin Zhu, Yu Ren, Pingbo Xu, Jiawei Chen, Changhong Miao
Malignant fibrous histiocytoma amplified sequence 1 (MFHAS1) is a predicted oncoprotein that demonstrates tumorigenic activity in vivo; however, the mechanisms involved are unknown. Macrophages are divided into the pro-inflammatory M1 and anti-inflammatory/protumoral M2 subtypes. Tumor cells can induce M2 polarization of tumor-associated macrophages (TAMs) to promote metastasis; but the underlying pathways require to be elucidated. In this study, we detected a positive association between MFHAS1 expression in TAMs and human colorectal cancer (CRC) TNM stage...
October 21, 2016: Oncotarget
https://www.readbyqxmd.com/read/27777198/-effect-of-low-selenium-diet-on-expressions-of-ccr7-cd206-and-cd163-in-the-liver-and-kidney-of-rats
#19
Li-Yun Wang, Jian-Hua Yi, Hang-Chao Xu, Xiao-Fang Wu, Dan-Yang Li, Jing Han
OBJECTIVE: To investigate the effect of low-selenium diet on the liver and kidneys of rats and explore the role of macrophage polarization into M1 and M2 phenotypes in liver and kidney injuries. METHODS: Twenty-four rats (12 female and 12 male) were randomly divided into control group and low-selenium group and fed with normal chow (dietary selenium of 0.18 mg/kg) and low-selenium diet (dietary selenium of 0.02 mg/kg) for 109 days. After the feeding, the rats were sacrificed for HE staining to observe liver and kidney pathologies, and immunohistochemistry was performed for analyzing CCR7, CD206, CD163-positive cell numbers in the liver and kidneys...
October 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/27776738/bone-marrow-derived-innate-macrophages-attenuate-oxazolone-induced-colitis
#20
Zhao Cheng, Hong-Ling Peng, Rong Zhang, Xian-Ming Fu, Guang-Sen Zhang
Previous studies have shown that a subpopulation of granulocyte macrophage colony-stimulating factor (GM-CSF)-dependent F4/80(high) CD11b(high) innate macrophages could be derived from bone marrow cells by continuous in vitro culturing. These cells could be induced to differentiate into M1 or M2 macrophages in vitro. In the current study, we sought to determine whether bone marrow cell-derived innate macrophages (BMIMs) could be used to fulfill an anti-inflammatory purpose by intravenous transplantation in vivo after being stimulated to differentiate into M2 macrophages...
October 12, 2016: Cellular Immunology
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