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Macrophage activation

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https://www.readbyqxmd.com/read/29145718/lipopolysaccharide-lps-induced-autophagy-is-responsible-for-enhanced-osteoclastogenesis
#1
Ok-Joo Sul, Hyun-Jung Park, Ho-Jung Son, Hye-Seon Choi
We hypothesized that inflammation affects number and activity of osteoclasts (OCs) via enhancing autophagy. Lipopolysaccharide (LPS) induced autophagy, osteoclastogenesis, and cytoplasmic reactive oxygen species (ROS) in bone marrowderived macrophages that were pre-stimulated with receptor activator of nuclear factor-κB ligand. An autophagy inhibitor, 3-methyladenine (3-MA) decreased LPS-induced OC formation and bone resorption, indicating that autophagy is responsible for increasing number and activity of OCs upon LPS stimulus...
November 16, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/29144803/endocrine-manifestations-of-primary-hyperoxaluria
#2
Shatha Murad, Yuval Eisenberg
OBJECTIVE: Primary hyperoxaluria type 1 (PH1) is a rare metabolic disorder of oxalate overproduction. It is associated with urolithiasis and nephrocalcinosis which progress to ESRD and systemic oxalosis. As oxalate deposits in tissues, non-parathyroid hormone (nonPTH) mediated hypercalcemia, oxalate osteopathy, primary hypothyroidism and primary hypogonadism develop. In this review, we will present a case of PH1 and provide an overview of this clinical entity and its endocrine manifestations...
November 16, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/29144506/soluble-p-selectin-promotes-retinal-ganglion-cell-survival-through-activation-of-nrf2-signaling-after-ischemia-injury
#3
Kishan Kapupara, Yao-Tseng Wen, Rong-Kung Tsai, Shun-Ping Huang
Retinal ischemic injuries play an important role in the pathogenesis of several eye disorders. Inflammation and oxidative stress are key players in ischemic injuries. Following retinal ischemia, vascular endothelial cells and leukocytes express several inflammatory adhesion receptors, such as selectins and cell adhesion molecules. P-selectin stimulates leukocyte recruitment to platelet aggregates and has an important role in vascular homeostasis and inflammatory leukocyte extravasation. Soluble P-selectin can be neuroprotective through competitive binding to the receptors of endogenous P-selectin molecules...
November 16, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29143915/effects-of-aging-on-fracture-healing
#4
REVIEW
Dan Clark, Mary Nakamura, Ted Miclau, Ralph Marcucio
PURPOSE OF REVIEW: This review summarizes research on the physiological changes that occur with aging and the resulting effects on fracture healing. RECENT FINDINGS: Aging affects the inflammatory response during fracture healing through senescence of the immune response and increased systemic pro-inflammatory status. Important cells of the inflammatory response, macrophages, T cells, mesenchymal stem cells, have demonstrated intrinsic age-related changes that could impact fracture healing...
November 16, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/29142352/localized-pontine-uptake-in-fluorine-18-fuorodeoxyglucose-positron-emission-tomography-computed-tomography-in-a-case-of-hyponatremia-a-case-report-and-review-of-literature
#5
Thangalakshmi Sivathapandi, Shelley Simon, Indirani Elangovan
A rare acquired demyelinating lesion of the pons central pontine myelinolysis (CPM) typically occurs after rapid correction of hyponatremia. There is disruption of blood-brain barrier due to osmotic stress allowing access for inflammatory mediators in extravascular brain tissue, which most likely attracts glial cells of the brain, attracts macrophages, and activates astrocytes. We present a case of female with a known history of inflammatory bowel disease who presented with altered sensorium and hyponatremia...
October 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/29142311/a-standardized-herbal-extract-mitigates-tumor-inflammation-and-augments-chemotherapy-effect-of-docetaxel-in-prostate-cancer
#6
Chin-Hsien Tsai, Sheue-Fen Tzeng, Shih-Chuan Hsieh, Yu-Chih Yang, Yi-Wen Hsiao, Mong-Hsun Tsai, Pei-Wen Hsiao
Activation of the NFκB pathway is often associated with advanced cancer and has thus been regarded as a rational therapeutic target. Wedelia chinensis is rich in luteolin, apigenin, and wedelolactone that act synergistically to suppress androgen receptor activity in prostate cancer. Interestingly, our evaluation of a standardized Wedelia chinensis herbal extract (WCE) concluded its efficacy on hormone-refractory prostate cancer through systemic mechanisms. Oral administration of WCE significantly attenuated tumor growth and metastasis in orthotopic PC-3 and DU145 xenografts...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29142285/blockade-of-cb1-cannabinoid-receptor-alters-gut-microbiota-and-attenuates-inflammation-and-diet-induced-obesity
#7
Pegah Mehrpouya-Bahrami, Kumaraswamy Naidu Chitrala, Mitra S Ganewatta, Chuanbing Tang, E Angela Murphy, Reilly T Enos, Kandy T Velazquez, Jamie McCellan, Mitzi Nagarkatti, Prakash Nagarkatti
Obesity is characterized by chronic low-grade, systemic inflammation, altered gut microbiota, and gut barrier disruption. Additionally, obesity is associated with increased activity of endocannabinoid system (eCB). However, the clear connection between gut microbiota and the eCB system in the regulation of energy homeostasis and adipose tissue inflammation and metabolism, remains to be established. We investigated the effect of treatment of mice with a cannabinoid receptor 1 (CB1) antagonist on Diet-Induced Obesity (DIO), specifically whether such a treatment that blocks endocannabinoid activity can induce changes in gut microbiota and anti-inflammatory state in adipose tissue...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29142215/the-effects-of-artocarpin-on-wound-healing-in-vitro-and-in-vivo-studies
#8
Chung-Ju Yeh, Chin-Chuan Chen, Yann-Lii Leu, Ming-Wei Lin, Mei-Miao Chiu, Shu-Huei Wang
The skin protects the body against harmful substances and microorganisms. When the skin is damaged, wound healing must be finely regulated to restore the normal function of skin tissue. Artocarpin (ARTO), a prenylated flavonoid purified from the plant Artocarpus communis, has been reported to have anti-inflammatory and anti-cancer properties. The aim of the present study was to evaluate the wound healing potential and therapeutic mechanism of ARTO. Immunohistochemical staining of neutrophils and macrophages and mouse cytokine array analysis demonstrated that ARTO accelerates inflammatory progression and subsequently decreases persistent inflammation...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29142211/the-microbiota-protects-against-respiratory-infection-via-gm-csf-signaling
#9
Rebecca L Brown, Richard P Sequeira, Thomas B Clarke
The microbiota promotes resistance to respiratory infection, but the mechanistic basis for this is poorly defined. Here, we identify members of the microbiota that protect against respiratory infection by the major human pathogens Streptococcus pneumoniae and Klebsiella pneumoniae. We show that the microbiota enhances respiratory defenses via granulocyte-macrophage colony-stimulating factor (GM-CSF) signaling, which stimulates pathogen killing and clearance by alveolar macrophages through extracellular signal-regulated kinase signaling...
November 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29142196/dj-1-controls-bone-homeostasis-through-the-regulation-of-osteoclast-differentiation
#10
Hyuk Soon Kim, Seung Taek Nam, Se Hwan Mun, Sun-Kyeong Lee, Hyun Woo Kim, Young Hwan Park, Bokyung Kim, Kyung-Jong Won, Hae-Rim Kim, Yeong-Min Park, Hyung Sik Kim, Michael A Beaven, Young Mi Kim, Wahn Soo Choi
Receptor activator of NF-kB ligand (RANKL) generates intracellular reactive oxygen species (ROS), which increase RANKL-mediated signaling in osteoclast (OC) precursor bone marrow macrophages (BMMs). Here we show that a ROS scavenging protein DJ-1 negatively regulates RANKL-driven OC differentiation, also called osteoclastogenesis. DJ-1 ablation in mice leads to a decreased bone volume and an increase in OC numbers. In vitro, the activation of RANK-dependent signals is enhanced in DJ-1-deficient BMMs as compared to wild-type BMMs...
November 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29142175/macrophage-differentiation-induced-by-pma-is-mediated-by-activation-of-rhoa-rock-signaling
#11
Lifeng Yang, Fan Dai, Lian Tang, Yulan Le, Wenjuan Yao
In order to investigate the effects of RhoA/ROCK signaling in macrophage differentiation, we used 100 ng/mL PMA to induce macrophage differentiation from U937 cells in vitro. The observation of cell morphology and the expression of CD68 and SR-A were performed to confirm the differentiation induced by PMA. Western blot analysis showed that the expression of ROCK1 and ROCK2 and the phosphorylation of MYPT1 were significantly increased after PMA treatment. Pulldown assay showed that the activation of RhoA was obviously enhanced when U937 cells were treated with PMA...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/29142138/chitotriosidase-chit1-is-increased-in-microglia-and-macrophages-in-spinal-cord-of-amyotrophic-lateral-sclerosis-and-cerebrospinal-fluid-levels-correlate-with-disease-severity-and-progression
#12
Petra Steinacker, Federico Verde, Lubin Fang, Emily Feneberg, Patrick Oeckl, Sigrun Roeber, Sarah Anderl-Straub, Adrian Danek, Janine Diehl-Schmid, Klaus Fassbender, Klaus Fliessbach, Hans Foerstl, Armin Giese, Holger Jahn, Jan Kassubek, Johannes Kornhuber, G Bernhard Landwehrmeyer, Martin Lauer, Elmar Hans Pinkhardt, Johannes Prudlo, Angela Rosenbohm, Anja Schneider, Matthias L Schroeter, Hayrettin Tumani, Christine A F von Arnim, Jochen Weishaupt, Patrick Weydt, Albert C Ludolph, Deniz Yilmazer Hanke, Markus Otto
OBJECTIVES: Neurochemical markers of amyotrophic lateral sclerosis (ALS) that reflect underlying disease mechanisms might help in diagnosis, staging and prediction of outcome. We aimed at determining the origin and differential diagnostic and prognostic potential of the putative marker of microglial activation chitotriosidase (CHIT1). METHODS: Altogether 316 patients were included, comprising patients with sporadic ALS, ALS mimics (disease controls (DCo)), frontotemporal lobar degeneration (FTLD), Creutzfeldt-Jakob disease (CJD), Alzheimer's disease (AD), Parkinson's disease (PD) and healthy controls (Con)...
November 15, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29142134/tnf-mediated-survival-of-cd169-cells-promotes-immune-activation-during-vesicular-stomatitis-virus-infection
#13
Prashant V Shinde, Haifeng C Xu, Sathish Kumar Maney, Andreas Kloetgen, Sukumar Namineni, Yuan Zhuang, Nadine Honke, Namir Shaabani, Nicolas Bellora, Mareike Doerrenberg, Mirko Trilling, Vitaly I Pozdeev, Nico van Rooijen, Stefanie Scheu, Klaus Pfeffer, Paul R Crocker, Masato Tanaka, Sujitha Duggimpudi, Percy Knolle, Mathias Heikenwalder, Jürgen Ruland, Tak W Mak, Dirk Brenner, Aleksandra A Pandyra, Jessica I Hoell, Arndt Borkhardt, Dieter Häussinger, Karl S Lang, Philipp A Lang
Innate immune activation is essential to mount an effective antiviral response and to prime adaptive immunity. Although a crucial role of CD169(+) cells during vesicular stomatitis virus (VSV) infections is increasingly recognized, factors regulating CD169(+) cells during viral infections remain unclear. Here we show that tumor necrosis factor is produced by CD11b(+) Ly6C(+)Ly6G(+) cells following infection with VSV. The absence of TNF or TNF receptor 1 (TNFR1) resulted in reduced numbers of CD169(+) cells and in reduced IFN-I production during VSV infection, with a severe disease outcome...
November 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29142002/toll-like-receptor-2-has-a-prominent-but-nonessential-role-in-innate-immunity-to-staphylococcus-aureus-pneumonia
#14
Shawn J Skerrett, Marissa H Braff, H Denny Liggitt, Craig E Rubens
Staphylococcus aureus is an important cause of acute bacterial pneumonia. Toll-like receptor 2 (TLR2) recognizes multiple components of the bacterial cell wall and activates innate immune responses to gram-positive bacteria. We hypothesized that TLR2 would have an important role in pulmonary host defense against S. aureus TLR null (TLR2(-/-)) mice and wild type (WT) C57BL/6 controls were challenged with aerosolized S. aureus at a range of inocula for kinetic studies of cytokine and antimicrobial peptide expression, lung inflammation, bacterial killing by alveolar macrophages, and bacterial clearance...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29141957/adherent-invasive-escherichia-coli-in-inflammatory-bowel-disease
#15
REVIEW
Carolina Palmela, Caroline Chevarin, Zhilu Xu, Joana Torres, Gwladys Sevrin, Robert Hirten, Nicolas Barnich, Siew C Ng, Jean-Frederic Colombel
Intestinal microbiome dysbiosis has been consistently described in patients with IBD. In the last decades, Escherichia coli, and the adherent-invasive E coli (AIEC) pathotype in particular, has been implicated in the pathogenesis of IBD. Since the discovery of AIEC, two decades ago, progress has been made in unravelling these bacteria characteristics and its interaction with the gut immune system. The mechanisms of adhesion of AIEC to intestinal epithelial cells (via FimH and cell adhesion molecule 6) and its ability to escape autophagy when inside macrophages are reviewed here...
November 15, 2017: Gut
https://www.readbyqxmd.com/read/29141914/proteotranscriptomics-reveal-signaling-networks-in-the-ovarian-cancer-microenvironment
#16
Thomas Worzfeld, Florian Finkernagel, Silke Reinartz, Anne Konzer, Till Adhikary, Andrea Nist, Thorsten Stiewe, Uwe Wagner, Mario Looso, Johannes Graumann, Rolf Müller
Ovarian cancer is characterized by early transcoelomic metastatic spread via the peritoneal fluid, where tumor cell spheroids (TU), tumor-associated T cells (TAT), and macrophages (TAM) create a unique microenvironment promoting cancer progression, chemoresistance and immuno-suppression. However, the underlying signaling mechanisms remain largely obscure.  To chart these signaling networks, we performed comprehensive proteomic and transcriptomic analyses of TU, TAT and TAM from ascites of ovarian cancer patients...
November 15, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29141219/preventive-inhibition-of-liver-tumorigenesis-by-systemic-activation-of-innate-immune-functions
#17
Jin Lee, Rui Liao, Gaowei Wang, Bi-Huei Yang, Xiaolin Luo, Nissi M Varki, Shuang-Jian Qiu, Bing Ren, Wenxian Fu, Gen-Sheng Feng
Liver cancer has become the second most deadly malignant disease, with no efficient targeted or immune therapeutic agents available yet. While dissecting the roles of cytoplasmic signaling molecules in hepatocarcinogenesis using an inducible mouse gene targeting system, Mx1-cre, we identified a potent liver tumor-inhibitory effect of synthetic double-stranded RNA (dsRNA), polyinosinic-polycytidylic acid (pIC), an inducer of the Mx1-cre system. Injection of pIC at the pre-cancer stage robustly suppressed liver tumorigenesis either induced by chemical carcinogens or by Pten loss and associated hepatosteatosis...
November 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/29141025/suppression-of-inflammatory-and-infection-responses-in-lung-macrophages-by-eucalyptus-oil-and-its-constituent-1-8-cineole-role-of-pattern-recognition-receptors-trem-1-and-nlrp3-the-map-kinase-regulator-mkp-1-and-nf%C3%AE%C2%BAb
#18
Niket Yadav, Harish Chandra
Eucalyptus oil (EO) used in traditional medicine continues to prove useful for aroma therapy in respiratory ailments; however, there is a paucity of information on its mechanism of action and active components. In this direction, we investigated EO and its dominant constituent 1,8-cineole (eucalyptol) using the murine lung alveolar macrophage (AM) cell line MH-S. In an LPS-induced AM inflammation model, pre-treatment with EO significantly reduced (P ≤0.01or 0.05) the pro-inflammatory mediators TNF-α, IL-1 (α and β), and NO, albeit at a variable rate and extent; 1,8-cineole diminished IL-1 and IL-6...
2017: PloS One
https://www.readbyqxmd.com/read/29140923/il-4-mediates-the-analgesia-produced-by-low-intensity-exercise-in-mice-with-neuropathic-pain
#19
Franciane Bobinski, Juliana Maia Teixeira, Kathleen Anne Sluka, Adair Roberto Soares Santos
Peripheral nerve injury (PNI) activates the immune system resulting in increased pro-inflammatory cytokines at the site of injury and in the spinal cord dorsal horn. Exercise modulates the immune system promoting an anti-inflammatory phenotype of macrophages in uninjured muscle, and increases in anti-inflammatory cytokines can promote healing and analgesia. We proposed that PNI will decrease, and treadmill exercise will increase, release of anti-inflammatory cytokines at the site of injury and in the spinal cord...
November 13, 2017: Pain
https://www.readbyqxmd.com/read/29140820/renal-effects-of-cytokines-in-hypertension
#20
Yi Wen, Steven D Crowley
PURPOSE OF REVIEW: Inflammatory cytokines contribute to the pathogenesis of hypertension through effects on renal blood flow and sodium handling. This review will update recent advances that explore the renal actions of immune cells and cytokines in the pathogenesis of hypertension. RECENT FINDINGS: Populations of cells from both the innate and adaptive immune systems contribute to hypertension by modulating functions of the vasculature and epithelial cells in the kidney...
November 14, 2017: Current Opinion in Nephrology and Hypertension
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