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Maren Kasper, Karoline Walscheid, Björn Laffer, Dirk Bauer, Martin Busch, Lena Wildschütz, Bo Wang, Karin Loser, Thomas Vogl, Rafael S Grajewski, Thomas Langmann, Arnd Heiligenhaus
HLA-B27 is the allele most frequently associated with human anterior uveitis. The majority of HLA-B27-positive [acute anterior uveitis (AAU)] patients develop clinically distinct symptoms with acute symptomatic onset of flare and a recurrent disease course characterized by a massive cellular ocular infiltrate during uveitis relapse. By contrast, uveitis in HLA-B27-negative [idiopathic anterior uveitis (IAU)] patients tends to develop a clinically less fulminant, more chronic, and typically asymptomatic disease course...
2018: Frontiers in Immunology
Arash Forouzan, Kambiz Masoumi, Fakher Rahim, Meisam Moezzi, Ali Khavanin, Nastaran Ranjbari, Malehi Amal Saki, Amirali Fallah Amoli, Niloofar Akhiani, Fatemeh Ghourchian
Study Design: This study was performed to investigate the diagnostic values of some inflammatory biomarkers in abdominal pain. Methods: Patients over 18 years of age with acute recent abdominal pain who presented to the Emergency Department were evaluated. Serum and urinary samples were taken and evaluated for serum and urine S100A8/A9 and serum amyloid A. All patients were referred to a surgeon and were followed up until the final diagnosis. In the end, the final diagnosis was compared with the levels of biomarkers...
2018: Disease Markers
Hannah Trøstrup, Christian Johann Lerche, Lars Jackie Christophersen, Kim Thomsen, Peter Østrup Jensen, Hans Petter Hougen, Niels Høiby, Claus Moser
No abstract text is available yet for this article.
November 30, 2017: Pathogens and Disease
Chonggao Yin, Guoxin Zhang, Ruimei Sun, Xinting Pan, Xuewen Wang, Hongli Li, Yunbo Sun
In our previous study, advanced glycosylation end‑product specific receptor (RAGE) was observed to bind to S100A8/A9 and cause epithelial mesenchymal transition (EMT). The results from target gene prediction revealed that microRNA (miR)‑185‑5p had a RAGE binding site. However, the function of miR‑185‑5p in the invasion and migration of breast cancer remains ambiguous. In the present study, the expression of miR‑185‑5p was examined in breast cancer tissues and cells. Clinical features revealed a negative correlation between miR‑185‑5p and tumor size, as well as in tumor differentiation and lymph node metastasis in breast cancer...
September 2018: Molecular Medicine Reports
Ahoud A Jazzar, Penelope J Shirlaw, Guy H Carpenter, Stephen J Challacombe, Gordon B Proctor
BACKGROUND: Sjögren's syndrome (SS) is an autoimmune inflammatory disease that affects the exocrine glands. The absence of early diagnostic markers contributes to delays in its diagnosis. Identification of changes in the protein profile of saliva is considered one of the promising strategies for the discovery of new biomarkers for SS. OBJECTIVE: To identify salivary protein biomarkers with potential for use in discriminating between different lymphoma risk subgroups of SS...
July 12, 2018: Journal of Oral Pathology & Medicine
Sofia Björnfot Holmström, Ronaldo Lira-Junior, Stephanie Zwicker, Mirjam Majster, Anders Gustafsson, Sigvard Åkerman, Björn Klinge, Mattias Svensson, Elisabeth A Boström
Matrix metalloproteinase (MMP)-12, S100A8/A9, and S100A12 are involved in innate immune responses. We addressed whether different aspects of oral health and non-disease-related covariates influence their levels in saliva. 436 participants were clinically examined, completed a health questionnaire, and provided stimulated saliva. Salivary levels of MMP-12, S100A8/A9, and S100A12 were determined by enzyme-linked immunosorbent assays. Lower MMP-12 levels were observed in individuals 40-64 years old (yo) compared to < 40 yo, and higher S100A8/A9 levels were found in individuals > 64 yo compared to 40-64 yo...
July 5, 2018: Cytokine
Abhijit Basu, Saira Munir, Medanie A Mulaw, Karmveer Singh, Diana Crisan, Anca Sindrilaru, Nicolai Treiber, Meinhard Wlaschek, Markus Huber-Lang, Florian Gebhard, Karin Scharffetter-Kochanek
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has been fixed in the paper.
July 2, 2018: Scientific Reports
Valentina Giudice, Zhijie Wu, Sachiko Kajigaya, Maria Del Pilar Fernandez Ibanez, Olga Rios, Foo Cheung, Sawa Ito, Neal S Young
The alarmin family members S100A8 and S100A9 are acute phase inflammation proteins, but they also have been proposed as biomarkers in many malignant and non-malignant diseases. In this study, circulating S100A8 and S100A9 homodimers and S100A8/A9 heterodimers in plasma were systematically investigated by ELISA in aplastic anemia (AA) and myelodysplastic syndromes (MDS). Plasma was obtained from 58 severe AA (SAA) and 30 MDS patients, and from 47 age- and sex-matched healthy donors. In 40 out of the 58 AA subjects, S100A protein levels were measured before and 6 months after immunosuppressive therapy (IST)...
June 26, 2018: Cytokine
S Shi, J-L Yi
OBJECTIVE: Inflammation and extracellular matrix degradation play a role in cardiac rupture (CR) after myocardial infarction (MI). It has been found that the expression of inflammatory cytokine S100A8/A9 was elevated in acute MI patients, whereas its impact in CR after infarction remains unclear. PATIENTS AND METHODS: Samples from cardiac tissue and peripheral blood of patients with CR after MI, MI, patients without CR, and healthy control (cardiotrauma) were collected to test the expressions of S100A8/A9, p-p65, and MMP-9...
June 2018: European Review for Medical and Pharmacological Sciences
Siwen Wang, Rui Song, Ziyi Wang, Zhaocheng Jing, Shaoxiong Wang, Jian Ma
S100A8 and S100A9 (also known as MRP8 and MRP14, respectively) are Ca2+ binding proteins belonging to the S100 family. They often exist in the form of heterodimer, while homodimer exists very little because of the stability. S100A8/A9 is constitutively expressed in neutrophils and monocytes as a Ca2+ sensor, participating in cytoskeleton rearrangement and arachidonic acid metabolism. During inflammation, S100A8/A9 is released actively and exerts a critical role in modulating the inflammatory response by stimulating leukocyte recruitment and inducing cytokine secretion...
2018: Frontiers in Immunology
Anna Medkova, Josef Srovnal, Jarmila Potomkova, Jana Volejnikova, Vladimir Mihal
BACKGROUND: Numerous articles related to S100 proteins have been recently published. This review aims to introduce this large protein family and its importance in the diagnostics of many pathological conditions in children and adults. DATA SOURCES: Based on original publications found in database systems, we summarize the current knowledge about the S100 protein group and highlight the most important proteins with focus on pediatric use. RESULTS: The S100 family is composed of Ca2+  and Zn2+  binding proteins, which are present only in vertebrates...
June 1, 2018: World Journal of Pediatrics: WJP
Gamze Tanriover, Mehmet Berk Eyinc, Elnur Aliyev, Sayra Dilmac, Nuray Erin
BACKGROUND: Increased S100A8/A9 expression in Gr1-positive cells has been shown in myeloid-derived suppressor cells and may play a role in the formation of a metastatic milieu. We aimed to determine S100A8/A9 expression alone and with coexpression of Gr1 (a myeloid marker) in primary tumor and visceral tissues invaded by metastatic breast carcinoma. MATERIALS AND METHODS: Female BALB/c mice were injected with 4TLM, 4THM, and 67NR orthotopically. Confluent cells (75%-80%) were used...
April 26, 2018: Clinical Breast Cancer
Alessandra Tammaro, Sandrine Florquin, Mascha Brok, Nike Claessen, Loes M Butter, Gwendoline J D Teske, Onno J de Boer, Thomas Vogl, Jaklien C Leemans, Mark C Dessing
Despite advances in our understanding of the mechanisms underlying progression of chronic kidney disease and the development of fibrosis, only limited efficacious therapies exist. The calcium binding protein S100A8/A9, is a damage-associated molecular pattern which can activate TLR4 or RAGE. Activation of these receptors is involved in the progression of renal fibrosis, however the role of S100A8/A9 herein remains unknown. Therefore, we analyzed S100A8/A9 expression in patients and mice with obstructive nephropathy and subjected wild-type and S100A9 KO mice lacking the heterodimer S100A8/A9 to Unilateral Ureteral Obstruction (UUO)...
May 10, 2018: Clinical and Experimental Immunology
Prabhakara R Nagareddy, Sunil K Noothi, Michelle C Flynn, Andrew J Murphy
Platelets play a critical role in both the initiation and progression of atherosclerosis, and even more so in the ensuing atherothrombotic complications. Low-dose aspirin remains the mainstay of antiplatelet therapy in high-risk patients by reducing the risk of myocardial ischemia, stroke or death due to cardiovascular disease. However, antiplatelet therapies lose their efficacy in people with diabetes mellitus, increasing the risk of future atherothrombotic events. The molecular mechanisms that promote platelet hyperactivity remain unclear but could be due to glycation-induced conformational changes of platelet membranes resulting in impaired aspirin entry or less-efficient acetylation/compensatory increase in COX-2 expression in newborn platelets...
July 2018: Journal of Endocrinology
Irene Di Ceglie, Giuliana Ascone, Niels A J Cremers, Annet W Sloetjes, Birgitte Walgreen, Thomas Vogl, Johannes Roth, J Sjef Verbeek, Fons A J van de Loo, Marije I Koenders, Peter M van der Kraan, Arjen B Blom, Martijn H J van den Bosch, Peter L E M van Lent
BACKGROUND: Osteoclast-mediated bone erosion is a central feature of rheumatoid arthritis (RA). Immune complexes, present in a large percentage of patients, bind to Fcγ receptors (FcγRs), thereby modulating the activity of immune cells. In this study, we investigated the contribution of FcγRs, and FcγRIV in particular, during antigen-induced arthritis (AIA). METHODS: AIA was induced in knee joints of wild-type (WT), FcγRI,II,III-/- , and FcγRI,II,III,IV-/- mice...
May 2, 2018: Arthritis Research & Therapy
Abhijit Basu, Saira Munir, Medanie A Mulaw, Karmveer Singh, Diana Crisan, Anca Sindrilaru, Nicolai Treiber, Meinhard Wlaschek, Markus Huber-Lang, Florian Gebhard, Karin Scharffetter-Kochanek
We here investigated whether the unique capacity of mesenchymal stem cells (MSCs) to re-establish tissue homeostasis depends on their potential to sense danger associated molecular pattern (DAMP) and to mount an adaptive response in the interest of tissue repair. Unexpectedly, after injection of MSCs which had been pretreated with the calcium-binding DAMP protein S100A8/A9 into murine full-thickness wounds, we observed a significant acceleration of healing even exceeding that of non-treated MSCs. This correlates with a fundamental reprogramming of the transcriptome in S100A8/A9 treated MSCs as deduced from RNA-seq analysis and its validation...
April 18, 2018: Scientific Reports
Lieke Tweehuysen, Nathan den Broeder, Noortje van Herwaarden, Leo A B Joosten, Peter L van Lent, Thomas Vogl, Frank H J van den Hoogen, Rogier M Thurlings, Alfons A den Broeder
Objectives: Calprotectin (S100A8/A9) has been correlated with disease activity in rheumatoid arthritis (RA). The aim of this study was to investigate the predictive value of serum calprotectin for clinical response after starting and tapering anti-tumour necrosis factor treatment in RA. Methods: Serum samples and clinical outcomes were derived from two longitudinal RA studies.At baseline (starting or tapering of adalimumab or etanercept), calprotectin levels were determined by ELISA...
2018: RMD Open
Juan Yun, Tong Xiao, Lei Zhou, Roger W Beuerman, Juanjuan Li, Yuan Zhao, Amir Hadayer, Xiaomin Zhang, Deming Sun, Henry J Kaplan, Hui Shao
Purpose: To investigate the role of damage-associated molecular patterns (DAMPs) in recurrent experimental autoimmune uveitis (EAU). Methods: Recurrent EAU was induced in Lewis rats by interphotoreceptor retinoid-binding protein (IRBP) R16-peptide specific T cells (tEAU). Aqueous humor and serum samples were kinetically collected and DAMPs examined by quantitative proteomics, Western blot analysis, and ELISA. tEAU rats were treated with S100 inhibitor paquinimod followed by disease evaluation...
March 1, 2018: Investigative Ophthalmology & Visual Science
F D'Amico, M Granata, E Skarmoutsou, C Trovato, G Lovero, P Gangemi, V Longo, M Pettinato, M C Mazzarino
The pathophysiology of psoriasis is very complex and involves an interplay between immune cells and keratinocytes. The keratinocyte production of calprotectin (S100A8/A9), induced by the inflammatory psoriatic milieu, may be involved in initiating immune cell invasion, as well as in propagating inflammation. However, the exact role of calprotectin in psoriasis remains unclear. Therapeutic approaches utilizing adalimumab, etanercept and ustekinumab are widely used in psoriatic treatment, but their anti-inflammatory mechanisms are not fully understood...
July 2018: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
Véronique Schenten, Sébastien Plançon, Nicolas Jung, Justine Hann, Jean-Luc Bueb, Sabrina Bréchard, Eric J Tschirhart, Fabrice Tolle
S100A8 and S100A9 are members of the S100 family of cytoplasmic EF-hand Ca2+ -binding proteins and are abundantly expressed in the cytosol of neutrophils. In addition to their intracellular roles, S100A8/A9 can be secreted in the extracellular environment and are considered as alarmins able to amplify the inflammatory response. The intracellular activity of S100A8/A9 was shown to be regulated by S100A9 phosphorylation, but the importance of this phosphorylation on the extracellular activity of S100A8/A9 has not yet been extensively studied...
2018: Frontiers in Immunology
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