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https://www.readbyqxmd.com/read/28208246/combined-proteome-and-eicosanoid-profiling-approach-for-revealing-implications-of-human-fibroblasts-in-chronic-inflammation
#1
Ammar Tahir, Andrea Bileck, Besnik Muqaku, Laura Niederstaetter, Dominique Kreutz, Rupert L Mayer, Denise Wolrab, Samuel M Meier, Astrid Slany, Christopher Gerner
During inflammation, proteins and lipids act in a concerted fashion, calling for combined analyses. Fibroblasts are powerful mediators of chronic inflammation. However, little is known about eicosanoid formation by human fibroblasts. The aim of this study was to analyze the formation of the most relevant inflammation mediators including proteins and lipids in human fibroblasts upon inflammatory stimulation and subsequent treatment with dexamethasone, a powerful antiphlogistic drug. Label-free quantification was applied for proteome profiling, while an in-house established data-dependent analysis method based on high-resolution mass spectrometry was applied for eicosadomics...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28196918/m1-macrophages-are-required-for-murine-cerebral-aneurysm-formation
#2
Kamil W Nowicki, Koji Hosaka, Frank J Walch, Edward W Scott, Brian L Hoh
INTRODUCTION: Macrophages and neutrophils have been separately implicated in cerebral aneurysm formation. The interactions between different myeloid subsets and the contributions of macrophage phenotypes in these lesions over time are not known. The purpose of the study was to examine macrophage phenotypic changes in cerebral aneurysms. METHODS: We induced aneurysm formation in C57BL/6 mice and quantified contributions of M1 and M2 macrophages in aneurysm specimens with or without neutrophil blockade...
February 14, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28193223/malondialdehyde-acetaldehyde-maa-adducted-surfactant-protein-induced-lung-inflammation-is-mediated-through-scavenger-receptor-a-sr-a1
#3
Muna Sapkota, Jane M DeVasure, Kusum K Kharbanda, Todd A Wyatt
BACKGROUND: Co-exposure to cigarette smoke and alcohol leads to the generation of high concentrations of acetaldehyde and malondialdehyde in the lung. These aldehydes being highly electrophilic in nature react with biologically relevant proteins such as surfactant protein D (SPD) through a Schiff base reaction to generate SPD adducted malondialdehyde-acetaldehyde adduct (SPD-MAA) in mouse lung. SPD-MAA results in an increase in lung pro-inflammatory chemokine, keratinocyte chemoattractant (KC), and the recruitment of lung lavage neutrophils...
February 13, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28188248/the-pivotal-role-of-cxcr7-in-stabilization-of-the-pulmonary-epithelial-barrier-in-acute-pulmonary-inflammation
#4
Kristian-Christos Ngamsri, Anika Müller, Hans Bösmüller, Jutta Gamper-Tsigaras, Jörg Reutershan, Franziska M Konrad
Acute pulmonary inflammation is still a frightening complication in intensive care units and has a high mortality. Specific treatment is not available, and many details of the pathomechanism remain unclear. The recently discovered chemokine receptor CXCR7 and its ligand stromal cell-derived factor (SDF)-1 are known to be involved in inflammation. We chose to investigate the detailed role of CXCR7 in a murine model of LPS inhalation. Inflammation increased pulmonary expression of CXCR7, and the receptor was predominantly expressed on pulmonary epithelium and on polymorphonuclear neutrophil (PMNs) after transepithelial migration into the alveolar space...
February 10, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28188224/lung-pericyte-like-cells-are-functional-immune-sentinel-cells
#5
Chi F Hung, Kristen L Mittelsteadt, Rena Brauer, Bonnie L McKinney, Teal S Hallstrand, William C Parks, Peter Chen, Lynn M Schnapp, W Conrad Liles, Jeremy S Duffield, William A Altemeier
Pericytes are perivascular PDGFRβ+ stromal cells required for vasculogenesis and maintenance of microvascular homeostasis in many organs. Because of their unique juxtaposition to microvascular endothelium, lung PDGFRβ+ cells are well situated to detect pro-inflammatory molecules released following epithelial injury and promote acute inflammatory responses. Thus, we hypothesized that these cells represent an unrecognized immune surveillance or injury-sentinel interstitial cell. To evaluate this hypothesis, we isolated PDGFRβ+ cells from murine lung and demonstrated that they have characteristics consistent with a pericyte population (referred to as pericyte-like cells for simplicity hereafter)...
February 10, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28186423/translational-repression-of-a-splice-variant-of-cynomolgus-macaque-cxcl1l-by-its-c-terminal-sequence
#6
Hisayuki Nomiyama, Naoki Osada, Ichiro Takahashi, Keiji Terao, Kazuya Yamagata, Osamu Yoshie
We previously isolated a cDNA clone from cynomolgus macaque encoding a novel CXC chemokine that we termed CXCL1L from its close similarity to CXCL1. However, the cDNA consisted of 3 exons instead of 4 exons that were typically seen in other CXC chemokines. Here, we isolated a cDNA encoding the full-length variant of CXCL1L that we termed CXCL1Lβ. CXCL1Lβ is 50 amino acids longer than the original CXCL1L, which we now term CXCL1Lα. The CXCL1Lβ mRNA is much more abundantly expressed in the cynomolgus macaque tissues than CXCL1Lα mRNA...
February 10, 2017: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/28178994/doxycycline-attenuates-breast-cancer-related-inflammation-by-decreasing-plasma-lysophosphatidate-concentrations-and-inhibiting-nf-%C3%AE%C2%BAb-activation
#7
Xiaoyun Tang, Xianyan Wang, Yuan Y Zhao, Jonathan M Curtis, David N Brindley
BACKGROUND: We previously discovered that tetracyclines increase the expression of lipid phosphate phosphatases at the surface of cells. These enzymes degrade circulating lysophosphatidate and therefore doxycycline increases the turnover of plasma lysophosphatidate and decreases its concentration. Extracellular lysophosphatidate signals through six G protein-coupled receptors and it is a potent promoter of tumor growth, metastasis and chemo-resistance. These effects depend partly on the stimulation of inflammation that lysophosphatidate produces...
February 8, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28178176/nlrp12-inflammasome-expression-in-the-rat-brain-in-response-to-lps-during-morphine-tolerance
#8
Sulie L Chang, Wenfei Huang, Xin Mao, Sabroni Sarkar
Morphine, an effective but addictive analgesic, can profoundly affect the inflammatory response to pathogens, and long-term use can result in morphine tolerance. Inflammasomes are protein complexes involved in the inflammatory response. The nucleotide-binding oligomerization domain-like receptor (NLR) Family Pyrin Domain Containing (NLRP) 12 (NLRP12) inflammasome has been reported to have anti-inflammatory activity. In this study, we examined the expression of NLRP12 inflammasome related genes in the adult F344 rat brain in response to the bacterial endotoxin lipopolysaccharide (LPS) in the presence and absence of morphine tolerance...
February 6, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28176455/adiponectin-promotes-human-jaw-bone-marrow-mesenchymal-stem-cell-chemotaxis-via-cxcl1-and-cxcl8
#9
Yinfei Pu, Mengke Wang, Yingying Hong, Yuwei Wu, Zhihui Tang
Adiponectin (APN) is known to promote the osteogenic differentiation of human jaw bone marrow mesenchymal stem cells (h-JBMMSCs). However, the underlying mechanism has not been fully elucidated. Previously, we showed that APN could promote h-JBMMSC osteogenesis via APPL1-p38 by up-regulating osteogenesis-related genes. Here, we aimed to determine whether APN could promote h-JBMMSC chemotaxis through CXCL1/CXCL8. The CCK-8, wound healing and transwell assays were used to evaluate the proliferation, migration and chemotaxis of h-JBMMSCs with or without APN treatment...
February 8, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28165282/oral-recombinant-human-or-mouse-lactoferrin-reduces-mycobacterium-tuberculosis-tdm-induced-granulomatous-lung-pathology
#10
Shen-An Hwang, Marian L Kruzel, Jeffrey K Actor
Trehalose 6'6-dimycolate (TDM) is the most abundant glycolipid on the cell wall of Mycobacterium tuberculosis (MTB). TDM is capable of inducing granulomatous pathology in mouse models that resembles those induced by MTB infection. Using the acute TDM model, this work investigates the effect of recombinant human and mouse lactoferrin to reduce granulomatous pathology. C57BL/6 mice were injected intravenously with TDM at a dose of 25 μg·mouse(-1). At day 4 and 6, recombinant human or mouse lactoferrin (1 mg·(100 μL)(-1)·mouse(-1)) were delivered by gavage...
February 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28153880/tamoxifen-directly-inhibits-platelet-angiogenic-potential-and-platelet-mediated-metastasis
#11
Kelly E Johnson, Jodi A Forward, Mason D Tippy, Julia R Ceglowski, Saleh El-Husayni, Rajesh Kulenthirarajan, Kellie R Machlus, Erica L Mayer, Joseph E Italiano, Elisabeth M Battinelli
OBJECTIVE: Platelets, which are mainly known for their role in hemostasis, are now known to play a crucial role in metastasis. Tamoxifen is a selective estrogen receptor modulator that is widely used for the treatment of breast cancer. Tamoxifen and its metabolites have been shown to directly impact platelet function, suggesting that this drug has additional mechanisms of action. The purpose of this study was to determine whether tamoxifen exerts antitumor effects through direct platelet inhibition...
February 2, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28148307/intrathecal-th17-and-b-cell-associated-cytokine-and-chemokine-responses-in-relation-to-clinical-outcome-in-lyme-neuroborreliosis-a-large-retrospective-study
#12
Paula Gyllemark, Pia Forsberg, Jan Ernerudh, Anna J Henningsson
BACKGROUND: B cell immunity, including the chemokine CXCL13, has an established role in Lyme neuroborreliosis, and also, T helper (Th) 17 immunity, including IL-17A, has recently been implicated. METHODS: We analysed a set of cytokines and chemokines associated with B cell and Th17 immunity in cerebrospinal fluid and serum from clinically well-characterized patients with definite Lyme neuroborreliosis (group 1, n = 49), defined by both cerebrospinal fluid pleocytosis and Borrelia-specific antibodies in cerebrospinal fluid and from two groups with possible Lyme neuroborreliosis, showing either pleocytosis (group 2, n = 14) or Borrelia-specific antibodies in cerebrospinal fluid (group 3, n = 14)...
February 1, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28141595/the-role-of-mincle-in-innate-immune-to-fungal-keratitis
#13
Guiqiu Zhao, Qiang Xu, Jing Lin, Wenjun Chen, Tingting Cui, Liting Hu, Nan Jiang
INTRODUCTION: This study aimed to detect the early expression of macrophage-inducible C-type lectin (Mincle) and investigate its role in the innate immune response of fungal keratitis (FK). METHODOLOGY: Wistar rats were used to make fungal keratitis models. The inflammatory responses and corneal lesions were observed by slit-lamp microscope.RT-PCR, immunohistochemistry, and immunofluorescence were used to detect the expression of Mincle in the rat corneal epithelium...
January 30, 2017: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/28129666/non-invasive-proteome-analysis-of-psoriatic-stratum-corneum-reflects-pathophysiological-pathways-and-is-useful-for-drug-profiling
#14
B Méhul, G Laffet, A Séraïdaris, L Russo, P Fogel, I Carlavan, C Pernin, P Andres, C Queille-Roussel, J J Voegel
BACKGROUND: Protein expression is disturbed in psoriatic stratum corneum. Non-invasive methods for the description of pathophysiological changes and drug profiling in psoriasis are desirable. OBJECTIVES: Undertake large scale non-invasive protein expression studies in psoriatic stratum corneum to identify biomarkers of pathophysiological processes and use them for drug profiling. METHODS: Psoriatic stratum corneum was harvested through repetitive tape-stripping...
January 27, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28129639/ladarixin-a-dual-cxcr1-2-inhibitor-attenuates-experimental-melanomas-harboring-different-molecular-defects-by-affecting-malignant-cells-and-tumor-microenvironment
#15
Daria Marley Kemp, Alyson Pidich, Mary Larijani, Rebecca Jonas, Elizabeth Lash, Takami Sato, Mizue Terai, Maria De Pizzol, Marcello Allegretti, Olga Igoucheva, Vitali Alexeev
CXCR1 and CXCR2 chemokine receptors and their ligands (CXCL1/2/3/7/8) play an important role in tumor progression. Tested to date CXCR1/2 antagonists and chemokine-targeted antibodies were reported to affect malignant cells in vitro and in animal models. Yet, redundancy of chemotactic signals and toxicity hinder further clinical development of these approaches. In this pre-clinical study we investigated the capacity of a novel small molecule dual CXCR1/2 inhibitor, Ladarixin (LDX), to attenuate progression of experimental human melanomas...
January 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28127756/absence-of-dcir1-reduces-the-mortality-rate-of-endotoxemic-hepatitis-in-mice
#16
Toshifumi Ishiguro, Testuya Fukawa, Kotaro Akaki, Koji Nagaoka, Tatsuki Takeda, Yoichiro Iwakura, Kayo Inaba, Kazuhiko Takahara
Dendritic cell immunoreceptor (DCIR) is a C-type lectin with an immunoreceptor tyrosine-based inhibitory motif (ITIM). Mice lacking DCIR1 (Dcir1(-/-) mice) show higher susceptibility to chronic arthritis with increasing age, suggesting that DCIR1 is involved in immune modulation via its ITIM. However, the role of DCIR1 in acute immune responses is not clear. In this study, we explored its role in acute experimental hepatitis. Upon injection of d-galactosamine and lipopolysaccharide, Dcir1(-/-) mice showed decreased mortality rates and serum levels of alanine aminotransferase (ALT)...
January 26, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28122813/hs1-deficiency-impairs-neutrophil-recruitment-in-vivo-and-activation-of-the-small-gtpases-rac1-and-rap1
#17
Joanna Latasiewicz, Annette Artz, Ding Jing, Mariana Pacheco Blanco, Silke M Currie, Martha Velázquez Avila, Michael Schnoor, Dietmar Vestweber
Neutrophil extravasation is a critical step of the innate immune system's response to inflammation. This multistep process is tightly regulated by adhesion and signaling molecules in the endothelium and neutrophils. Activation of the β2 integrin LFA-1 is critical for adhesion of leukocytes to postcapillary venules. This step requires coordinated activation of signaling pathways in chemokine-stimulated neutrophils, including GTPase activation and cytoskeletal remodeling, leading to conformational changes in LFA-1...
January 25, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28120431/central-role-of-the-tir-domain-containing-adaptor-inducing-interferon-%C3%AE-trif-adaptor-protein-in-murine-sterile-liver-injury
#18
Katherine J Brempelis, Sebastian Y Yuen, Nicole Schwarz, Isaac Mohar, Ian N Crispe
: Multiple pathways drive the sterile injury response in the liver; however, it is unclear how the type of cells injured or the mechanism of injury activates these pathways. Here, we use a model of selective hepatocyte death to investigate sterile liver injury. In this model, the TIR-domain-containing adaptor-inducing interferon-β (TRIF) was a central mediator of the resulting intrahepatic inflammatory response that was independent of both upstream Toll-like receptor (TLR) 4 signaling and downstream type I IFN signaling...
January 24, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28117354/identification-of-consensus-biomarkers-for-predicting-non-genotoxic-hepatocarcinogens
#19
Shan-Han Huang, Chun-Wei Tung
The assessment of non-genotoxic hepatocarcinogens (NGHCs) is currently relying on two-year rodent bioassays. Toxicogenomics biomarkers provide a potential alternative method for the prioritization of NGHCs that could be useful for risk assessment. However, previous studies using inconsistently classified chemicals as the training set and a single microarray dataset concluded no consensus biomarkers. In this study, 4 consensus biomarkers of A2m, Ca3, Cxcl1, and Cyp8b1 were identified from four large-scale microarray datasets of the one-day single maximum tolerated dose and a large set of chemicals without inconsistent classifications...
January 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28113104/dietary-tryptophan-alleviates-dextran-sodium-sulfate-induced-colitis-through-aryl-hydrocarbon-receptor-in-mice
#20
Jahidul Islam, Shoko Sato, Kouichi Watanabe, Takaya Watanabe, Ardiansyah, Keisuke Hirahara, Yukihide Aoyama, Shuhei Tomita, Hisashi Aso, Michio Komai, Hitoshi Shirakawa
Ulcerative colitis is the typical progression of chronic inflammatory bowel disease. Amino acids, particularly tryptophan, have been reported to exert a protective effect against colitis induced by dextran sodium sulfate (DSS), but the precise underlying mechanisms remain incompletely clarified. Tryptophan metabolites are recognized to function as endogenous ligands for aryl hydrocarbon receptor (Ahr), which is a critical regulator of inflammation and immunity. Thus, we conducted this study to investigate whether dietary tryptophan supplementation protects against DSS-induced colitis by acting through Ahr...
January 12, 2017: Journal of Nutritional Biochemistry
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