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https://www.readbyqxmd.com/read/28736160/macrophage-phenotype-in-response-to-ecm-bioscaffolds
#1
REVIEW
Luai Huleihel, Jenna L Dziki, Joseph G Bartolacci, Theresa Rausch, Michelle E Scarritt, Madeline C Cramer, Tatiana Vorobyov, Samuel T LoPresti, Ilea T Swineheart, Lisa J White, Bryan N Brown, Stephen F Badylak
Macrophage presence and phenotype are critical determinants of the healing response following injury. Downregulation of the pro-inflammatory macrophage phenotype has been associated with the therapeutic use of bioscaffolds composed of extracellular matrix (ECM), but phenotypic characterization of macrophages has typically been limited to small number of non-specific cell surface markers or expressed proteins. The present study determined the response of both primary murine bone marrow derived macrophages (BMDM) and a transformed human mononuclear cell line (THP-1 cells) to degradation products of two different, commonly used ECM bioscaffolds; urinary bladder matrix (UBM-ECM) and small intestinal submucosa (SIS-ECM)...
July 20, 2017: Seminars in Immunology
https://www.readbyqxmd.com/read/28724916/involvement-of-the-p62-nrf2-signal-transduction-pathway-on-erythrophagocytosis
#2
Inês B Santarino, Michelle S Viegas, Neuza S Domingues, Ana M Ribeiro, Miguel P Soares, Otília V Vieira
Erythrophagocytosis, the phagocytic removal of damaged red blood cells (RBC), and subsequent phagolysosome biogenesis are important processes in iron/heme metabolism and homeostasis. Phagolysosome biogenesis implies the interaction of nascent phagosomes with endocytic compartments and also autophagy effectors. Here, we report that besides recruitment of microtubule-associated protein-1-light chain 3 (LC3), additional autophagy machinery such as sequestosome 1 (p62) is also acquired by single-membrane phagosomes at very early stages of the phagocytic process and that its acquisition is very important to the outcome of the process...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719070/sirtuin-1-attenuates-inflammation-and-hepatocellular-damage-in-liver-transplant-ischemia-reperfusion-from-mouse-to-human
#3
Kojiro Nakamura, Shoichi Kageyama, Bibo Ke, Takehiro Fujii, Rebecca A Sosa, Elaine F Reed, Nakul Datta, Ali Zarrinpar, Ronald W Busuttil, Jerzy W Kupiec-Weglinski
Hepatic ischemia-reperfusion injury (IRI), an inevitable antigen-independent inflammation response in cadaveric liver transplantation, correlates with poor early graft function, rejection episodes, and contributes to donor organ shortage. Sirtuin 1 (SIRT1) is a histone deacetylase which may regulate inflammatory cell activity and manage liver function in IRI, though its functional role and clinical relevance remains to be elucidated. We investigated the efficacy of SIRT1 activation in murine liver IRI model and verified the concept of putative SIRT1-mediated hepatoprotection in clinical liver transplantation...
July 18, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28689811/ampk-activation-ameliorates-d-galn-lps-induced-acute-liver-failure-by-upregulating-foxo3a-to-induce-autophagy
#4
Yan-Min Liu, Jun Lv, Qing-Lei Zeng, Shen Shen, Ji-Yuan Xing, Ying-Ying Zhang, Zhi-Hao Zhang, Zu-Jiang Yu
BACKGROUND AND AIM: Acute liver failure (ALF) is an uncommon but serious disease still carrying a high mortality. This study aimed to investigate the mechanism of AMPK on D-GalN/LPS-induced ALF. METHODS: In this study, we utilized intraperitoneal injection of D-GalN/LPS to induce ALF model, and analyzed the expression of AMPK, inflammatory cytokines (TNF-α, IL-1β and IL-6), Foxo3A and autophagy-related genes (Atg-5, Beclin-1, Atg-7) by real-time quantitative polymerase chain reaction (RT-PCR) in liver tissue...
July 6, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28677920/the-genetic-heterogeneity-among-different-mouse-strains-impacts-the-lung-injury-potential-of-multiwalled-carbon-nanotubes
#5
Xiang Wang, Yu-Pei Liao, Donatello Telesca, Chong Hyun Chang, Tian Xia, André E Nel
Genetic variation constitutes an important variable impacting the susceptibility to inhalable toxic substances and air pollutants, as reflected by epidemiological studies in humans and differences among animal strains. While multiwalled carbon nanotubes (MWCNTs) are capable of causing lung fibrosis in rodents, it is unclear to what extent the genetic variation in different mouse strains influence the outcome. Four inbred mouse strains, including C57Bl/6, Balb/c, NOD/ShiLtJ, and A/J, to test the pro-fibrogenic effects of a library of MWCNTs in vitro and in vivo are chosen...
July 5, 2017: Small
https://www.readbyqxmd.com/read/28660207/chlamydia-muridarum-infection-of-macrophages-stimulates-il-1%C3%AE-secretion-and-cell-death-via-activation-of-caspase-1-in-an-rip3-independent-manner
#6
Lixiang Chen, Xue Liu, Xin Yu, Rongrong Ren, Chao Wang, Rui Zhao, Guangxun Meng, Shun Li, Xiaohui Zhou
Chlamydiae are Gram-negative bacteria, which replicate exclusively in the infected host cells. Infection of the host cells by Chlamydiae stimulates the innate immune system leading to an inflammatory response, which is manifested not only by secretion of proinflammatory cytokines such as IL-1β from monocytes, macrophages, and dendritic cells, but also possibly by cell death mediated by Caspase-1 pyroptosis. RIP3 is a molecular switch that determines the development of necrosis or inflammation. However, the involvement of RIP3 in inflammasome activation by Chlamydia muridarum infection has not been clarified...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28659793/revisiting-the-role-of-interleukin-1-pathway-in-osteoarthritis-interleukin-1%C3%AE-and-1%C3%AE-and-nlrp3-inflammasome-are-not-involved-in-the-pathological-features-of-the-murine-menisectomy-model-of-osteoarthritis
#7
Sonia Nasi, Hang-Korng Ea, Alexander So, Nathalie Busso
Background: Innate immune response components such as toll-like receptors (TLRs) and NLRP3-inflammasome act in concert to increase IL-1α/β secretion by synovial macrophages. Previous results suggest that IL-1α/β could be an important mediator involved in the pathogenesis of osteoarthritis (OA). Objectives: The aim of our study was to evaluate the role of NLRP3, IL-1β, and IL-1α in the menisectomy (MNX) model of murine OA. Methods: Murine chondrocytes (CHs) and bone marrow-derived machrophages (BMDM) were stimulated with hydroxyapatite (HA) crystals, a form of calcium-containing crystal found in human OA, and IL-1β and IL-6 secretion assayed by ELISA...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28659486/differential-innate-immune-signaling-in-macrophages-by-wild-type-vaccinia-mature-virus-and-a-mutant-virus-deleting-a26-protein
#8
Siti Khadijah Kasani, Huei-Yin Cheng, Kun-Hai Eason Yeh, Shu-Jung Chang, Paul Wei-Che Hsu, Shu-Yun Tung, Chung-Tiang Liang, Wen Chang
The Western Reserve (WR) strain of mature vaccinia virus contains an A26 envelope protein that mediates virus binding to cell surface laminin and subsequent endocytic entry into HeLa cells. Removal of A26 protein from mature virus generates a mutant WRΔA26 that enters HeLa cells through plasma membrane fusion. Here, we infected murine bone marrow-derived macrophages (BMDM) with wild-type WR and WRΔA26 and analyzed viral gene expression and cellular innate immune signaling. In contrast to previous studies in which HeLa cells infected by WR or WRΔA26 both expressed abundant viral late proteins, we found that WR expressed much less viral late protein than WRΔA26 in BMDM...
June 28, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28653025/proteomics-data-on-map-kinase-kinase-3-knock-out-bone-marrow-derived-macrophages-exposed-to-cigarette-smoke-extract
#9
Roshni Srivastava, Praveen Mannam, Navin Rauniyar, TuKiet T Lam, Ruiyan Luo, Patty J Lee, Anup Srivastava
This data article reports changes in the phosphoproteome and total proteome of cigarette smoke extract (CSE) exposed WT and MAP Kinase Kinase 3 knock out (MKK3(-/-)) bone marrow derived macrophages (BMDM). The dataset generated is helpful for understanding the mechanism of CSE induced inflammation and the role of MAP kinase signaling pathway. The cellular proteins were labeled with isobaric tags for relative and absolute quantitation (iTRAQ®) reagents and analyzed by LC-MS/MS. The standard workflow module for iTRAQ® quantification within the Proteome Discoverer was utilized for the data analysis...
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28603491/nosh-nbp-a-novel-nitric-oxide-and-hydrogen-sulfide-releasing-hybrid-attenuates-ischemic-stroke-induced-neuroinflammatory-injury-by-modulating-microglia-polarization
#10
Jing Ji, Pengjun Xiang, Tingting Li, Li Lan, Xiaole Xu, Guo Lu, Hui Ji, Yihua Zhang, Yunman Li
NOSH-NBP, a novel nitric oxide (NO) and hydrogen sulfide (H2S)-releasing hybrid, protects brain from ischemic stroke. This study mainly aimed to investigate the therapeutic effect of NOSH-NBP on ischemic stroke and the underlying mechanisms. In vivo, transient middle cerebral artery occlusion (tMCAO) was performed in C57BL/6 mice, with NO-NBP and H2S-NBP as controls. NO and H2S scavengers, carboxy-PTIO and BSS, respectively, were used to quench NO and H2S of NOSH-NBP. In vitro, BV2 microglia/BMDM were induced to the M1/2 phenotype, and conditioned medium (CM) experiments in BV2 microglia, neurons and b...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28596294/the-metalloproteinase-adam8-promotes-leukocyte-recruitment-in-vitro-and-in-acute-lung-inflammation
#11
Daniela Dreymueller, Jessica Pruessmeyer, Julian Schumacher, Sandra Fellendorf, Franz Martin Hess, Anke Seifert, Aaron Babendreyer, Joerg Walter Bartsch, Andreas Ludwig
Alveolar leukocyte recruitment is a hallmark of acute lung inflammation and involves transmigration of leukocytes through endothelial and epithelial layers. The disintegrin and metalloproteinase (ADAM) 8 is expressed on human isolated leukocytic cells and can be further upregulated on cultured endothelial and epithelial cells by proinflammatory cytokines. By shRNA mediated knockdown we show that leukocytic ADAM8 is required on monocytic THP-1 cells for chemokine-induced chemotaxis as well as transendothelial and transepithelial migration...
June 8, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28557543/impaired-mitochondrial-microbicidal-responses-in-chronic-obstructive-pulmonary-disease-macrophages
#12
Martin A Bewley, Julie A Preston, Mohammed Mohasin, Helen M Marriott, Richard C Budd, Julie Swales, Paul Collini, David R Greaves, Ruth W Craig, Christopher E Brightling, Louise E Donnelly, Peter J Barnes, Dave Singh, Steven D Shapiro, Moira K B Whyte, David H Dockrell
RATIONALE: Chronic obstructive pulmonary disease (COPD) is characterized by impaired clearance of pulmonary bacteria. OBJECTIVES: The effect of COPD on alveolar macrophage (AM) microbicidal responses was investigated. METHODS: Alveolar macrophages (AMs) were obtained from bronchoalveolar lavage from healthy donors or COPD patients and challenged with opsonized serotype 14 Streptococcus pneumoniae. Cells were assessed for apoptosis, bactericidal activity and mitochondrial reactive oxygen species (mROS) production...
May 30, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28367448/differential-s1p-receptor-profiles-on-m1-and-m2-polarized-macrophages-affect-macrophage-cytokine-production-and-migration
#13
Jan Müller, Wolfram von Bernstorff, Claus-Dieter Heidecke, Tobias Schulze
Introduction. Macrophages are key players in complex biological processes. In response to environmental signals, macrophages undergo polarization towards a proinflammatory (M1) or anti-inflammatory (M2) phenotype. Sphingosine 1-phosphate (S1P) is a bioactive lysophospholipid that acts via 5 G-protein coupled receptors (S1P1-5) in order to influence a broad spectrum of biological processes. This study assesses S1P receptor expression on macrophages before and after M1 and M2 polarization and performs a comparative analysis of S1P signalling in the two activational states of macrophages...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28340575/nox2-deficiency-alters-macrophage-phenotype-through-an-il-10-stat3-dependent-mechanism-implications-for-traumatic-brain-injury
#14
James P Barrett, Rebecca J Henry, Sonia Villapol, Bogdan A Stoica, Alok Kumar, Mark P Burns, Alan I Faden, David J Loane
BACKGROUND: NADPH oxidase (NOX2) is an enzyme system that generates reactive oxygen species (ROS) in microglia and macrophages. Excessive ROS production is linked with neuroinflammation and chronic neurodegeneration following traumatic brain injury (TBI). Redox signaling regulates macrophage/microglial phenotypic responses (pro-inflammatory versus anti-inflammatory), and NOX2 inhibition following moderate-to-severe TBI markedly reduces pro-inflammatory activation of macrophages/microglia resulting in concomitant increases in anti-inflammatory responses...
March 24, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28278296/robust-growth-of-avirulent-phase-ii-coxiella-burnetii-in-bone-marrow-derived-murine-macrophages
#15
Diane C Cockrell, Carrie M Long, Shelly J Robertson, Jeffrey G Shannon, Heather E Miller, Lara Myers, Charles L Larson, Tregei Starr, Paul A Beare, Robert A Heinzen
Published data show that murine bone marrow-derived macrophages (BMDM) restrict growth of avirulent phase II, but not virulent phase I, Coxiella burnetii. Growth restriction of phase II bacteria is thought to result from potentiated recognition of pathogen-associated molecular patterns, which leads to production of inhibitory effector molecules. Past studies have used conditioned medium from L-929 murine fibroblasts as a source of macrophage-colony stimulating factor (M-CSF) to promote differentiation of bone marrow-derived myeloid precursors into macrophages...
2017: PloS One
https://www.readbyqxmd.com/read/28223293/loss-of-macrophage-fatty-acid-oxidation-does-not-potentiate-systemic-metabolic-dysfunction
#16
Elsie Gonzalez-Hurtado, Jieun Lee, Joseph Choi, Ebru S Selen Alpergin, Samuel L Collins, Maureen R Horton, Michael J Wolfgang
Fatty acid oxidation in macrophages has been suggested to play a causative role in high-fat diet-induced metabolic dysfunction, particularly in the etiology of adipose-driven insulin resistance. To understand the contribution of macrophage fatty acid oxidation directly to metabolic dysfunction in high-fat diet-induced obesity, we generated mice with a myeloid-specific knockout of carnitine palmitoyltransferase II (CPT2 Mϕ-KO), an obligate step in mitochondrial long-chain fatty acid oxidation. While fatty acid oxidation was clearly induced upon IL-4 stimulation, fatty acid oxidation-deficient CPT2 Mϕ-KO bone marrow-derived macrophages displayed canonical markers of M2 polarization following IL-4 stimulation in vitro...
May 1, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28182011/tak1-regulates-resident-macrophages-by-protecting-lysosomal-integrity
#17
Yosuke Sakamachi, Sho Morioka, September R Mihaly, Giichi Takaesu, Julie F Foley, Michael B Fessler, Jun Ninomiya-Tsuji
Hematopoietic cell survival and death is critical for development of a functional immune system. Here, we report that a protein kinase, TAK1, is selectively required for resident macrophage integrity during embryogenesis. Hematopoietic lineage-specific deletion of Tak1 gene (Tak1(HKO)) caused accumulation of cellular debris in the thymus in perinatal mice. Although no overt alteration in thymocytes and blood myeloid populations was observed in Tak1(HKO) mice, we found that thymic and lung macrophages were diminished...
February 9, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28174696/lack-of-oxyr-and-katg-results-in-extreme-susceptibility-of-francisella-tularensis-lvs-to-oxidative-stress-and-marked-attenuation-in-vivo
#18
Marie Honn, Helena Lindgren, Gurram K Bharath, Anders Sjöstedt
Francisella tularensis is an intracellular bacterium and as such is expected to encounter a continuous attack by reactive oxygen species (ROS) in its intracellular habitat and efficiently coping with oxidative stress is therefore essential for its survival. The oxidative stress response system of F. tularensis is complex and includes multiple antioxidant enzymes and pathways, including the transcriptional regulator OxyR and the H2O2-decomposing enzyme catalase, encoded by katG. The latter is regulated by OxyR...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28159912/identification-of-tbk1-complexes-required-for-the-phosphorylation-of-irf3-and-the-production-of-interferon-%C3%AE
#19
Siddharth Bakshi, Jordan Taylor, Sam Strickson, Thomas McCartney, Philip Cohen
The double-stranded RNA mimetic poly(I:C) and lipopolysaccharide (LPS) activate Toll-like receptors 3 (TLR3) and TLR4, respectively, triggering the activation of TANK (TRAF family member-associated NF-κB activator)-binding kinase 1 (TBK1) complexes, the phosphorylation of interferon regulatory factor 3 (IRF3) and transcription of the interferon β (IFNβ) gene. Here, we demonstrate that the TANK-TBK1 and optineurin (OPTN)-TBK1 complexes control this pathway. The poly(I:C)- or LPS-stimulated phosphorylation of IRF3 at Ser396 and production of IFNβ were greatly reduced in bone marrow-derived macrophages (BMDMs) from TANK knockout (KO) mice crossed to knockin mice expressing the ubiquitin-binding-defective OPTN[D477N] mutant...
March 15, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28151471/nlrp3-inflammasome-activation-mediates-radiation-induced-pyroptosis-in-bone-marrow-derived-macrophages
#20
Yan-Gang Liu, Ji-Kuai Chen, Zi-Teng Zhang, Xiu-Juan Ma, Yong-Chun Chen, Xiu-Ming Du, Hong Liu, Ying Zong, Guo-Cai Lu
A limit to the clinical benefit of radiotherapy is not an incapacity to eliminate tumor cells but rather a limit on its capacity to do so without destroying normal tissue and inducing inflammation. Recent evidence reveals that the inflammasome is essential for mediating radiation-induced cell and tissue damage. In this study, using primary cultured bone marrow-derived macrophages (BMDM) and a mouse radiation model, we explored the role of NLRP3 inflammasome activation and the secondary pyroptosis underlying radiation-induced immune cell death...
February 2, 2017: Cell Death & Disease
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