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https://www.readbyqxmd.com/read/28923079/endoplasmic-reticulum-stress-cooperates-with-toll-like-receptor-ligation-in-driving-activation-of-rheumatoid-arthritis-fibroblast-like-synoviocytes
#1
Pawel A Kabala, Chiara Angiolilli, Nataliya Yeremenko, Aleksander M Grabiec, Barbara Giovannone, Desiree Pots, Timothy R Radstake, Dominique Baeten, Kris A Reedquist
BACKGROUND: Endoplasmic reticulum (ER) stress has proinflammatory properties, and transgenic animal studies of rheumatoid arthritis (RA) indicate its relevance in the process of joint destruction. Because currently available studies are focused primarily on myeloid cells, we assessed how ER stress might affect the inflammatory responses of stromal cells in RA. METHODS: ER stress was induced in RA fibroblast-like synoviocytes (FLS), dermal fibroblasts, and macrophages with thapsigargin or tunicamycin alone or in combination with Toll-like receptor (TLR) ligands, and gene expression and messenger RNA (mRNA) stability was measured by quantitative polymerase chain reaction...
September 18, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28920954/p38-mapk-mk2-dependent-phosphorylation-controls-cytotoxic-ripk1-signalling-in-inflammation-and%C3%A2-infection
#2
Manoj B Menon, Julia Gropengießer, Jessica Fischer, Lena Novikova, Anne Deuretzbacher, Juri Lafera, Hanna Schimmeck, Nicole Czymmeck, Natalia Ronkina, Alexey Kotlyarov, Martin Aepfelbacher, Matthias Gaestel, Klaus Ruckdeschel
Receptor-interacting protein kinase-1 (RIPK1), a master regulator of cell fate decisions, was identified as a direct substrate of MAPKAP kinase-2 (MK2) by phosphoproteomic screens using LPS-treated macrophages and stress-stimulated embryonic fibroblasts. p38(MAPK)/MK2 interact with RIPK1 in a cytoplasmic complex and MK2 phosphorylates mouse RIPK1 at Ser321/336 in response to pro-inflammatory stimuli, such as TNF and LPS, and infection with the pathogen Yersinia enterocolitica. MK2 phosphorylation inhibits RIPK1 autophosphorylation, curtails RIPK1 integration into cytoplasmic cytotoxic complexes, and suppresses RIPK1-dependent apoptosis and necroptosis...
September 18, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28919696/potential-of-pomegranate-fruit-extract-punica-granatum-linn-to-increase-vascular-endothelial-growth-factor-and-platelet-derived-growth-factor-expressions-on-the-post-tooth-extraction-wound-of-cavia-cobaya
#3
Intan Nirwana, Priyawan Rachmadi, Devi Rianti
BACKGROUND: Pomegranates fruit extracts have several activities, among others, anti-inflammatory, antibacterial, and antioxidants that have the main content punicalagin and ellagic acid. Pomegranate has the ability of various therapies through different mechanisms. Vascular endothelial growth factor (VEGF) function was to form new blood vessels produced by various cells one of them was macrophages. Platelet-derived growth factor (PDGF) was a growth factor proven chemotactic, increased fibroblast proliferation and collagen matrix production...
August 2017: Veterinary World
https://www.readbyqxmd.com/read/28916165/muc1-deficiency-exacerbates-pulmonary-fibrosis-in-a-mouse-model-of-silicosis
#4
Kosuke Kato, Marina A Zemskova, Alec D Hanss, Marianne M Kim, Sandra J Gendler, Ross Summer, Kwang Chul Kim
BACKGROUND: MUC1 (MUC in human and Muc in animals) is a membrane-tethered mucin expressed on the apical surface of lung epithelial cells. However, in the lungs of patients with interstitial lung disease, MUC1 is aberrantly expressed in hyperplastic alveolar type II epithelial (ATII) cells and alveolar macrophages (AM), and elevated levels of extracellular MUC1 are found in bronchoalveolar lavage (BAL) fluid and the serum of these patients. While pro-fibrotic effects of extracellular MUC1 have recently been described in cultured fibroblasts, the contribution of MUC1 to the pathobiology of pulmonary fibrosis is unknown...
September 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28912533/oral-fibroblasts-modulate-the-macrophage-response-to-bacterial-challenge
#5
Rinat Tzach-Nahman, Rizan Nashef, Omer Fleissig, Aharon Palmon, Lior Shapira, Asaf Wilensky, Gabriel Nussbaum
Tissue damage in chronic periodontal disease is driven by the host response to a dysbiotic microbiota, and not by bacteria directly. Among chronic inflammatory diseases of the oral cavity, inflammation and tissue damage around dental implants (peri-implantitis) is emerging as a major clinical challenge, since it is more severe and less responsive to treatment compared to inflammation around natural teeth. We tested whether oral fibroblasts from the periodontal ligament (PDLF), which are present around natural teeth but not around dental implants, actively regulate inflammatory responses to bacterial stimulation...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28899632/the-deposition-of-anti-dna-igg-contributes-to-the-development-of-cutaneous-lupus-erythematosus
#6
Yingying Dong, Yi Zhang, Linlin Xia, Ping Wang, Jingyun Chen, Meifeng Xu, Xingyin Liu, Yumin Xia
Anti-DNA IgG is a hallmark of systemic lupus erythematosus and induces internal injuries in patients. It is known that cutaneous lupus erythematosus (CLE) involves the deposition of autoantibodies in the dermoepidermal junction of the skin and that anti-DNA IgG binds specifically to keratinocytes. However, the definite role of anti-DNA IgG in CLE remains unclear. The purpose of this study was to elucidate the effect of anti-DNA IgG on keratinocytes in CLE. Skin tissues were collected from patients with CLE and healthy controls...
September 9, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28898718/interleukin-17-regulates-shp-2-and-il-17ra-stat-3-dependent-cyr61-il-23-and-gm-csf-expression-and-rankl-mediated-osteoclastogenesis-by-fibroblast-like-synoviocytes-in-rheumatoid-arthritis
#7
Ramamoorthi Ganesan, Mahaboobkhan Rasool
Interleukin (IL)-17 predominately produced by the Th17 cells, plays a crucial role in the fibroblast-like synoviocytes (FLS) mediated disease process of rheumatoid arthritis (RA). IL-17 exerts its pathogenic effects in RA-FLS by IL-17/IL-17RA/STAT-3 signaling. Recent studies have shown that RA-FLS produces SHP-2, Cyr61, IL-23, GM-CSF and RANKL which results in worsening of the disease. However, whether IL-17/IL-17RA/STAT-3 signaling regulates SHP-2, Cyr61, IL-23, GM-CSF and RANKL expressions in RA-FLS remains unknown...
September 9, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28898055/a-carbon-nanotube-optical-reporter-maps-endolysosomal-lipid-flux
#8
Prakrit V Jena, Daniel Roxbury, Thomas V Galassi, Leila Akkari, Christopher P Horoszko, David B Iaea, Januka Budhathoki-Uprety, Nina Pipalia, Abigail S Haka, Jackson D Harvey, Jeetain Mittal, Frederick R Maxfield, Johanna A Joyce, Daniel A Heller
Lipid accumulation within the lumen of endolysosomal vesicles is observed in various pathologies including atherosclerosis, liver disease, neurological disorders, lysosomal storage disorders, and cancer. Current methods cannot measure lipid flux specifically within the lysosomal lumen of live cells. We developed an optical reporter, composed of a photoluminescent carbon nanotube of a single chirality, that responds to lipid accumulation via modulation of the nanotube's optical band gap. The engineered nanomaterial, composed of short, single-stranded DNA and a single nanotube chirality, localizes exclusively to the lumen of endolysosomal organelles without adversely affecting cell viability or proliferation or organelle morphology, integrity, or function...
September 12, 2017: ACS Nano
https://www.readbyqxmd.com/read/28895865/long-term-culture-and-differentiation-of-porcine-red-bone-marrow-hematopoietic-cells-co-cultured-with-immortalized-mesenchymal-cells
#9
Abubakar Garba, Delphine D Acar, Inge D M Roukaerts, Lowiese M B Desmarets, Bert Devriendt, Hans J Nauwynck
Mesenchymal cells are multipotent stromal cells with self-renewal, differentiation and immunomodulatory capabilities. We aimed to develop a co-culture model for differentiating hematopoietic cells on top of immortalized mesenchymal cells for studying interactions between hematopoietic and mesenchymal cells, useful for adequately exploring the therapeutic potential of mesenchymal cells. In this study, we investigated the survival, proliferation and differentiation of porcine red bone marrow hematopoietic cells co-cultured with immortalized porcine bone marrow mesenchymal cells for a period of five weeks...
September 2017: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/28892415/susceptibility-of-m-tuberculosis-infected-host-cells-to-phospho-mlkl-driven-necroptosis-is-dependent-on-cell-type-and-presence-of-tnf%C3%AE
#10
Rachel E Butler, Nitya Krishnan, Waldo Garcia-Jimenez, Robert Francis, Abbe Martyn, Tom Mendum, Shaza Felemban, Nicolas Locker, Javier Salguero-Bodes, Brian Robertson, Graham R Stewart
An important feature of Mycobacterium tuberculosis pathogenesis is the ability to control cell death in infected host cells, including inhibition of apoptosis and stimulation of necrosis. Recently an alternative form of programmed cell death, necroptosis, has been described where necrotic cell death is induced by apoptotic stimuli under conditions where apoptotic execution is inhibited. We show for the first time that M. tuberculosis and TNFα synergise to induce necroptosis in murine fibroblasts via RIPK1-dependent mechanisms and characterized by phosphorylation of Ser345 of the MLKL necroptosis death effector...
September 11, 2017: Virulence
https://www.readbyqxmd.com/read/28890654/chondroitin-sulfate-inhibits-monocyte-chemoattractant-protein-1-release-from-3t3-l1-adipocytes-a-new-treatment-opportunity-for-obesity-related-inflammation
#11
Thomas V Stabler, Eulàlia Montell, Josep Vergés, Janet L Huebner, Virginia Byers Kraus
Monocyte chemoattractant protein-1 (MCP-1) overproduction from inflamed adipose tissue is a major contributor to obesity-related metabolic syndromes. 3T3-L1 embryonic fibroblasts were cultured and differentiated into adipocytes using an established protocol. Adipocytes were treated with lipopolysaccharide (LPS) to induce inflammation and thus MCP-1 release. At the same time, varying concentrations of chondroitin sulfate (CS) were added in a physiologically relevant range (10-200 µg/mL) to determine its impact on MCP-1 release...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28886261/syndecan-2-attenuates-radiation-induced-pulmonary-fibrosis-and-inhibits-fibroblast-activation-by-regulating-pi3k-akt-rock-pathway-via-cd148
#12
Konstantin Tsoyi, Sarah G Chu, Nasly G Patino-Jaramillo, Julie Wilder, Julian Villalba, Melanie Doyle-Eisele, Jacob McDonald, Xiaoli Liu, Souheil El-Chemaly, Mark A Perrella, Ivan O Rosas
RATIONALE: Radiation-induced pulmonary fibrosis is a severe complication of patients treated with thoracic irradiation. We have previously shown that syndecan-2 reduces fibrosis by exerting alveolar epithelial cytoprotective effects. Here, we investigate whether syndecan-2 attenuates radiation-induced pulmonary fibrosis by inhibiting fibroblast activation. METHODS: C57BL/6 wild type (WT) mice and transgenic (TG) mice that overexpress human syndecan-2 in alveolar macrophages were exposed to 14 Gy whole thoracic radiation...
September 8, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28884679/the-integration-of-a-macrophage-adapted-live-vaccine-strain-of-equine-infectious-anaemia-virus-eiav-in-the-horse-genome
#13
Qiang Liu, Xue-Feng Wang, Cheng Du, Yue-Zhi Lin, Jian Ma, Yu-Hong Wang, Jian-Hua Zhou, Xiaojun Wang
Integration is an important feature of retroviruses and retrovirus-based therapeutic transfection vectors. The non-primate lentivirus equine infectious anaemia virus (EIAV) primarily targets macrophages/monocytes in vivo. Investigation of the integration features of EIAVDLV121 strains, which are adapted to donkey monocyte-derived macrophages (MDMs), is of great interest. In this study, we analysed the integration features of EIAVDLV121 in equine MDMs during in vitro infection. Our previously published integration sites (IS) for EIAVFDDV13 in fetal equine dermal (FED) cells were also analysed in parallel as references...
September 7, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28884506/evaluation-of-a-series-of-silk-fibroin-protein-based-nonwoven-mats-for-use-as-an-anti-adhesion-patch-for-wound-management-in-robotic-surgery
#14
Yu-Chi Wang, Meng-Yi Bai, Wan-Yuan Hsu, Mu-Hsien Yu
A novel anti-adhesion nonwoven mat mainly composed of silk fibroin protein (SFP) was fabricated via the single-spinneret electrospinning technique. A series of SFP-based electrospun nonwoven mats containing additives of different synthetic polymer ratios, such as pure SFP, SFP/poly(vinyl alcohol) (PVA), SFP/polyethylene glycol (PEG), and SFP/polyethylene oxide (PEO) were produced and compared. All membranes were porous and had diameters of 324.02 ± 113.7, 308.86 ± 74.02, 366.22 ± 115.81, and 341...
September 7, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28883006/acute-fibrinous-and-organising-pneumonia
#15
João Rocha Gonçalves, Ricardo Marques, Paula Serra, Leila Cardoso
Acute fibrinous and organising pneumonia (AFOP) is a rare histological pattern of interstitial lung disease. The authors describe a 60-year-old woman admitted to the hospital for sustained fever, presenting with an alveolar opacity on chest X-ray, with the presumed diagnosis of community-acquired pneumonia and the onset of antibiotics. Since serological results suggested that Legionella pneumophila was the infectious agent, she was discharged on levofloxacin. A week later, she was again admitted with fever...
September 7, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28882883/cytoprotective-activated-protein-c-averts-nlrp3-inflammasome-induced-ischemia-reperfusion-injury-via-mtorc1-inhibition
#16
Sumra Nazir, Ihsan Gadi, Moh'd Mohanad Al-Dabet, Ahmed Elwakiel, Shrey Kohli, Sanchita Ghosh, Jayakumar Manoharan, Satish Ranjan, Fabian Bock, Ruediger C Braun-Dullaeus, Charles T Esmon, Tobias B Huber, Eric Camerer, Chris Dockendorff, John H Griffin, Berend Isermann, Khurrum Shahzad
Cytoprotection by activated protein C (aPC) following ischemia-reperfusion injury (IRI) is associated with apoptosis inhibition. However, IRI is hallmarked by inflammation and hence conceptually cell-death forms disjunct from immunologically silent apoptosis are more likely to be relevant. As pyroptosis, cell death resulting from inflammasome activation, is typically observed in IRI we speculated that aPC ameliorates IRI by inhibiting inflammasome activation. Here we analyzed the impact of aPC on inflammasome activity in myocardial and renal IRI...
September 7, 2017: Blood
https://www.readbyqxmd.com/read/28881745/whole-tumor-rna-sequencing-and-deconvolution-reveal-a-clinically-prognostic-pten-pi3k-regulated-glioma-transcriptional-signature
#17
Yuan Pan, Erin C Bush, Joseph A Toonen, Yu Ma, Anne C Solga, Peter A Sims, David H Gutmann
The concept that solid tumors are maintained by a productive interplay between neoplastic and non-neoplastic elements has gained traction with the demonstration that stromal fibroblasts and immune system cells dictate cancer development and progression. While less studied, brain tumor (glioma) biology is likewise influenced by non-neoplastic immune system cells (macrophages and microglia) which interact with neoplastic glioma cells to create a unique physiological state (glioma ecosystem) distinct from that found in the normal tissue...
August 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28875577/biocompatibility-assessment-of-cyclic-olefin-copolymers-impact-of-two-additives-on-cytotoxicity-oxidative-stress-inflammatory-reactions-and-hemocompatibility
#18
Mélisande Bernard, Emile Jubeli, Joudi Bakar, Lionel Tortolano, Johanna Saunier, Najet Yagoubi
This work reports the biocompatibility evaluation of cyclic olefin copolymers (COC) as candidates for implantable medical devices. The focus was to establish the influence of two major additives (antioxidant and lubricant) on the overall biocompatibility. The cytotoxicity was evaluated according to ISO 10993-5 guidelines using L929 fibroblasts, HUVEC and THP-1-derived macrophages. Oxidative stress (ROS, GSH/GSSG and SOD analysis) and pro-inflammatory cytokines (Il-6 and TNF-α secretion) were quantified using THP-1 cells in direct contact with films...
September 5, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28874692/silver-nanoparticle-loaded-collagen-chitosan-scaffolds-promote-wound-healing-via-regulating-fibroblast-migration-and-macrophage-activation
#19
Chuangang You, Qiong Li, Xingang Wang, Pan Wu, Jon Kee Ho, Ronghua Jin, Liping Zhang, Huawei Shao, Chunmao Han
Treatment of full-thickness skin defects poses significant clinical challenges including risk of infection and severe scaring. Silver nanoparticle (NAg), an effective antimicrobial agent, has provided a promising therapeutic method for burn wounds. However, the detailed mechanism remains unknown. Hence, we constructed a metallic nanosilver particles-collagen/chitosan hybrid scaffold (NAg-CCS) and investigated its potential effects on wound healing. In vitro scratch assay, immunofluorescence staining and antibacterial activity of the scaffold were all studied...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28865088/a-co-culture-system-with-three-different-primary-human-cell-populations-reveals-that-biomaterials-and-msc-modulate-macrophage-driven-fibroblast-recruitment
#20
Hugo R Caires, Patrícia Barros da Silva, Mário A Barbosa, Catarina R Almeida
The biological response to implanted biomaterials is a complex and highly coordinated phenomenon involving many different cell types that interact within 3D microenvironments. Here, we increased the complexity of a 3D platform to include at least three cell types that play a role in the host response upon scaffold implantation. With this system it was possible to address how immune responses triggered by 3D biomaterials mediate recruitment of stromal cells that promote tissue regeneration, Mesenchymal Stromal/Stem Cells (MSC), or a foreign body response, fibroblasts...
September 1, 2017: Journal of Tissue Engineering and Regenerative Medicine
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