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https://www.readbyqxmd.com/read/28827575/immune-system-deregulation-in-hypertensive-patients-chronically-ras-suppressed-developing-albuminuria
#1
Marta Martin-Lorenzo, Laura Gonzalez-Calero, Paula J Martinez, Montserrat Baldan-Martin, Juan Antonio Lopez, Gema Ruiz-Hurtado, Fernando de la Cuesta, Julián Segura, Jesús Vazquez, Fernando Vivanco, Maria G Barderas, Luis M Ruilope, Gloria Alvarez-Llamas
Albuminuria development in hypertensive patients is an indicator of higher cardiovascular (CV) risk and renal damage. Chronic renin-angiotensin system (RAS) suppression facilitates blood pressure control but it does not prevent from albuminuria development. We pursued the identification of protein indicators in urine behind albuminuria development in hypertensive patients under RAS suppression. Urine was collected from 100 patients classified in three groups according to albuminuria development: (a) patients with persistent normoalbuminuria; (b) patients developing de novo albuminuria; (c) patients with maintained albuminuria...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807771/increase-of-intermediate-monocytes-in-gvhd-correlation-with-mdr1-th17-1-levels-and-the-effect-of-prednisolone-and-1%C3%AE-25-dihydroxyvitamin-d3
#2
Katharina Reinhardt-Heller, Insa Hirschberg, Peter Lang, Thomas Vogl, Rupert Handgretinger, Wolfgang A Bethge, Ursula Holzer
Graft-versus-host disease (GvHD) remains one of the major complications after allogeneic hematopoietic stem cell transplantation which is mainly treated with glucocorticoids such as prednisolone. In this study, the influence of monocyte subpopulations, prednisolone and 1α,25-Dihydroxyvitamin D3 on the induction of a pro-inflammatory subset of Th17 cells (MDR(+)Th17.1) characterized by CCR6(+)CXCR3(hi)CCR4(lo)CCR10(-)CD161(+) and stable expression of the multi-drug resistance protein type 1 (MDR1) was investigated...
August 11, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28771806/advanced-glycation-end-products-and-porphyromonas-gingivalis-lipopolysaccharide-increase-calprotectin-expression-in-human-gingival-epithelial-cells
#3
Yuka Hiroshima, Eijiro Sakamoto, Kaya Yoshida, Kaori Abe, Koji Naruishi, Takenori Yamamoto, Yasuo Shinohara, Jun-Ichi Kido, Carolyn L Geczy
Accumulation of advanced glycation end-products (AGEs) in periodontal tissues of patients with diabetes mellitus aggravates periodontitis, but the mechanisms are unknown. Calprotectin, a heterocomplex of S100A8 and S100A9 proteins, is a constitutive cytoplasmic component of healthy gingival epithelial cells. This study aimed at investigating the effects of AGE and Porphyromonas gingivalis lipopolysaccharide (PgLPS) on calprotectin expression in the human gingival epithelial cell line OBA-9. AGE and PgLPS increased the expression of S100A8 and S100A9 mRNAs, and AGE + PgLPS co-stimulation amplified their expression in OBA-9 cells...
August 3, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28769105/transcriptome-profiling-of-mouse-colonic-eosinophils-reveals-a-key-role-for-eosinophils-in-the-induction-of-s100a8-and-s100a9-in-mucosal-healing
#4
Reichman Hadar, Moshkovits Itay, Itan Michal, Pasmanik-Chor Metsada, Vogl Thomas, Roth Johannes, Munitz Ariel
Eosinophils are bone marrow-derived cells that have been largely implicated in Th2-associated diseases. Recent data highlights a key role for eosinophils in mucosal innate immune responses especially in the gastrointestinal (GI) tract, which is one of the largest eosinophil reservoirs in the body. Although eosinophils express and synthesize a plethora of proteins that can mediate their effector activities, the transcriptome signature of eosinophils in mucosal inflammation and subsequent repair has been considerably overlooked...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28761710/differential-expression-of-alarmins-s100a9-il-33-hmgb1-and-hif-1%C3%AE-in-supraspinatus-tendinopathy-before-and-after-treatment
#5
Michael J Mosca, Andrew J Carr, Sarah J B Snelling, Kim Wheway, Bridget Watkins, Stephanie G Dakin
BACKGROUND: Alarmins, endogenous molecules released on tissue damage have been shown to play an important role in inflammatory musculoskeletal conditions including fracture repair andrheumatoid arthritis. However, the contribution of alarmins to the pathogenesis of tendon disease is not fully understood. METHODS: We investigated expression of alarmin proteins (S100A9, high-mobility group box 1 (HMGB1) and interleukin-33 (IL-33) and hypoxia-inducible factor 1α (HIF-1α), a subunit of an oxygen sensitive transcription factor, in three cohorts of human supraspinatus tissues: healthy (n=6), painful diseased (n=13) and post-treatment pain-free tendon samples (n=5)...
2017: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/28759719/finke-watzky-two-step-nucleation-autocatalysis-model-of-s100a9-amyloid-formation-protein-misfolding-as-nucleation-event
#6
Igor A Iashchishyn, Darius Sulskis, Mai Nguyen Ngoc, Vytautas Smirnovas, Ludmilla A Morozova-Roche
Quantitative kinetic analysis is critical for understanding amyloid mechanisms. Here we demonstrate the application of generic Finke-Watzky (F-W) two-step nucleation-autocatalytic growth model to the concentration-dependent amyloid kinetics of proinflammatory α-helical S100A9 protein at pH 7.4 and at 37 and 42 °C. The model is based on two pseudoelementary reaction steps applied without further analytical constraints, and its treatment of S100A9 amyloid self-assembly demonstrates that initial misfolding and β-sheet formation, defined as "nucleation" step, spontaneously takes place within individual S100A9 molecules at higher rate than the subsequent fibrillar growth...
August 3, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28746820/the-role-of-damps-and-pamps-in-inflammation-mediated-vulnerability-of-atherosclerotic-plaques
#7
Vikrant Rai, Devendra K Agrawal
Atherosclerosis is a chronic inflammatory disease resulting in the formation of the atherosclerotic plaque. Plaque formation starts with the inflammation in fatty streak and progress through atheroma, atheromatous plaque, and fibroatheroma leading to development of stable plaque. Hypercholesterolemia, dyslipidemia, hyperglycemia are the risk factors for atherosclerosis. Inflammation, infection with viruses and bacteria, and dysregulation in the endothelial and vascular smooth muscle cells leads to advanced plaque formation...
July 26, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28744322/visualization-of-tumor-immune-interaction-target-specific-imaging-of-s100a8-a9-reveals-pre-metastatic-niche-establishment
#8
Michel Eisenblaetter, Fabian Flores-Borja, Jae Jin Lee, Christina Wefers, Hannah Smith, Rebekka Hueting, Margaret S Cooper, Philip J Blower, Dominic Patel, Manuel Rodriguez-Justo, Hanna Milewicz, Thomas Vogl, Johannes Roth, Andrew Tutt, Tobias Schaeffter, Tony Ng
Background Systemic cancer spread is preceded by the establishment of a permissive microenvironment in the target tissue of metastasis - the premetastatic niche. As crucial players in establishment of the pre-metastatic niche, myeloid derived suppressor cells (MDSC) release S100A8/A9, an exosomal protein that contributes to metastasis, angiogenesis, and immune suppression. We report the application of antibody-based single-photon emission computed tomography (SPECT) for detection of S100A8/A9 in vivo as an imaging marker for pre-metastatic tissue priming...
2017: Theranostics
https://www.readbyqxmd.com/read/28704797/knockout-of-rage-ameliorates-mainstream-cigarette-smoke-induced-airway-inflammation-in-mice
#9
Mei Chen, Tao Wang, Yongchun Shen, Dan Xu, Xiaoou Li, Jing An, Jiajia Dong, Diandian Li, Fuqiang Wen, Lei Chen
BACKGROUND: The receptor for advanced glycation end products (RAGE), a multiligand receptor, has been proved to be implicated in inflammatory responses in chronic obstructive pulmonary disease (COPD). In this study, we investigated the role of RAGE in cigarette smoke (CS)-induced airway inflammation in COPD. METHODS: Wild-type (WT) and RAGE gene knockout (KO) mice were exposed to mainstream CS or room air for 2h twice daily, 6days per week for consecutive 4weeks...
July 10, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28653889/bioinformatics-methods-for-identifying-differentially-expressed-genes-and-signaling-pathways-in-nano-silica-stimulated-macrophages
#10
Lin Zhang, Changfu Hao, Juan Li, Yaqian Qu, Lei Bao, Yiping Li, Zhongzheng Yue, Miao Zhang, Xinghao Yu, Huiting Chen, Jianhui Zhang, Di Wang, Wu Yao
The incidence of disease relating to nanoparticle exposure has been rising rapidly in recent years, for which there is no effective treatment. Macrophage is suggested to play a crucial role in the development of pulmonary disease. To investigate the changes in macrophage after being stimulated by nanometer silica dust and to explore potential biomarkers and signaling pathways, the gene chip GSE13005 was downloaded from Gene Expression Omnibus database, which contained 21 samples: 3 samples per group and 7 groups in total...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28643937/proinflammatory-effects-and-mechanisms-of-calprotectin-on-human-gingival-fibroblasts
#11
H Gao, J Hou, H Meng, X Zhang, Y Zheng, L Peng
BACKGROUND AND OBJECTIVE: Calprotectin (S100A8/A9) is a heterodimer of S100A8 and S100A9 and is associated with multiple inflammatory diseases, including Crohn's disease, rheumatoid arthritis and periodontitis. Levels of calprotectin are elevated in the gingival crevicular fluid of patients with periodontitis; however, the effects of calprotectin on human gingival fibroblasts (HGFs) remain unknown. This study investigated the proinflammatory activity of calprotectin on HGFs and the functional receptors and signaling pathways engaged by calprotectin...
June 23, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28609200/significance-of-s100a8-s100a9-and-calprotectin-levels-in-bladder-cancer
#12
O Yasar, T Akcay, C Obek, F A Turegun
OBJECTIVES: Members of the S100 protein family, S100A8, S100A9 and their heterodimer complex known as calprotectin are thought to be involved not only in inflammatory pathways but also in tumorigenesis and cancer progression. Therefore, they have been widely studied in various types of cancer; however, there is limited knowledge about their role in bladder cancer. In this study, our aim was to determine the levels of S100A8 and S100A9 in the sera, and calprotectin levels in the sera and urines of bladder cancer patients and compare it to urinary BTA, a tumor marker that can be used in the diagnosis of bladder cancer...
June 13, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28573847/nickel-sequestration-by-the-host-defense-protein-human-calprotectin
#13
Toshiki G Nakashige, Emily M Zygiel, Catherine L Drennan, Elizabeth M Nolan
The human innate immune protein calprotectin (CP, S100A8/S100A9 oligomer, calgranulin A/calgranulin B oligomer, MRP-8/MRP-14 oligomer) chelates a number of first-row transition metals, including Mn(II), Fe(II), and Zn(II), and can withhold these essential nutrients from microbes. Here we elucidate the Ni(II) coordination chemistry of human CP. We present a 2.6-Å crystal structure of Ni(II)- and Ca(II)-bound CP, which reveals that CP binds Ni(II) ions at both its transition-metal-binding sites: the His3Asp motif (site 1) and the His6 motif (site 2)...
June 22, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28573383/increased-expression-of-damage-associated-molecular-patterns-damps-in-osteoarthritis-of-human-knee-joint-compared-to-hip-joint
#14
John H Rosenberg, Vikrant Rai, Matthew F Dilisio, Todd D Sekundiak, Devendra K Agrawal
Osteoarthritis (OA) is a degenerative disease characterized by the destruction of cartilage. The greatest risk factors for the development of OA include age and obesity. Recent studies suggest the role of inflammation in the pathogenesis of OA. The two most common locations for OA to occur are in the knee and hip joints. The knee joint experiences more mechanical stress, cartilage degeneration, and inflammation than the hip joint. This could contribute to the increased incidence of OA in the knee joint. Damage-associated molecular patterns (DAMPs), including high-mobility group box-1, receptor for advanced glycation end products, and alarmins (S100A8 and S100A9), are released in the joint in response to stress-mediated chondrocyte and cartilage damage...
June 1, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28570273/myeloid-related-protein-14-regulates-deep-vein-thrombosis
#15
Yunmei Wang, Huiyun Gao, Chase W Kessinger, Alvin Schmaier, Farouc A Jaffer, Daniel I Simon
Using transcriptional profiling of platelets from patients presenting with acute myocardial infarction, we identified myeloid-related protein-14 (MRP-14, also known as S100A9) as an acute myocardial infarction gene and reported that platelet MRP-14 binding to platelet CD36 regulates arterial thrombosis. However, whether MRP-14 plays a role in venous thrombosis is unknown. We subjected WT and Mrp-14-deficient (Mrp-14-/-) mice to experimental models of deep vein thrombosis (DVT) by stasis ligation or partial flow restriction (stenosis) of the inferior vena cava...
June 2, 2017: JCI Insight
https://www.readbyqxmd.com/read/28569792/loss-of-epidermal-ap1-transcription-factor-function-reduces-filaggrin-level-alters-chemokine-expression-and-produces-an-ichthyosis-related-phenotype
#16
Christina A Young, Ellen A Rorke, Gautam Adhikary, Wen Xu, Richard L Eckert
AP1 transcription factors are important controllers of epidermal differentiation. Multiple family members are expressed in the epidermis in a differentiation-dependent manner, where they function to regulate gene expression. To study the role of AP1 factor signaling, TAM67 (dominant-negative c-jun) was inducibly expressed in the suprabasal epidermis. The TAM67-positive epidermis displays keratinocyte hyperproliferation, hyperkeratosis and parakeratosis, delayed differentiation, extensive subdermal vasodilation, nuclear loricrin localization, tail and digit pseudoainhum and reduced filaggrin level...
June 1, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28561859/human-calprotectin-affects-the-redox-speciation-of-iron
#17
Toshiki G Nakashige, Elizabeth M Nolan
We report that the metal-sequestering human host-defense protein calprotectin (CP, S100A8/S100A9 oligomer) affects the redox speciation of iron (Fe) in bacterial growth media and buffered aqueous solution. Under aerobic conditions and in the absence of an exogenous reducing agent, CP-Ser (S100A8(C42S)/S100A9(C3S) oligomer) depletes Fe from three different bacterial growth media preparations over a 48 h timeframe (T = 30 °C). The presence of the reducing agent β-mercaptoethanol accelerates this process and allows CP-Ser to deplete Fe over a ≈1 h timeframe...
August 16, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28550118/s100a9-potentiates-the-activation-of-neutrophils-by-the-etiological-agent-of-gout-monosodium-urate-crystals
#18
Louis-Simon Rousseau, Guillaume Paré, Asmaa Lachhab, Paul H Naccache, François Marceau, Philippe Tessier, Martin Pelletier, Maria Fernandes
Gout is one of the most painful types of arthritis that arises when the body mounts an acute inflammatory reaction against a crystallized form of uric acid known as monosodium urate crystals (MSUs). Although MSUs are known to activate neutrophils, the most abundant leukocyte in the synovial fluid of patients with gout, few studies have investigated the effect on neutrophils of the simultaneous stimulation with MSU and proinflammatory mediators in the inflamed joint. Herein, we focused on a protein that is highly expressed in the synovium in gout, S100A9...
May 26, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28545132/proteomics-investigation-of-oscc-specific-salivary-biomarkers-in-a-hungarian-population-highlights-the-importance-of-identification-of-population-tailored-biomarkers
#19
Éva Csősz, Péter Lábiscsák, Gergő Kalló, Bernadett Márkus, Miklós Emri, Adrienn Szabó, Ildikó Tar, József Tőzsér, Csongor Kiss, Ildikó Márton
Oral squamous cell carcinoma (OSCC) accounting for about 90% of malignant oral lesions is the 6th most common malignancy worldwide. Diagnostic delay may contribute to dismal survival rate therefore, there is a need for developing specific and sensitive biomarkers to improve early detection. Hungarian population occupies the top places of statistics regarding OSCC incidence and mortality figures therefore, we aimed at finding potential salivary protein biomarkers suitable for the Hungarian population. In this study we investigated 14 proteins which were previously reported as significantly elevated in saliva of patients with OSCC...
2017: PloS One
https://www.readbyqxmd.com/read/28498464/proinflammatory-effects-of-s100a8-a9-via-tlr4-and-rage-signaling-pathways-in-bv-2-microglial-cells
#20
Li Ma, Peng Sun, Jian-Cheng Zhang, Qing Zhang, Shang-Long Yao
S100A8/A9, a heterodimer of the two calcium-binding proteins S100A8 and S100A9, has emerged as an important proinflammatory mediator in acute and chronic inflammation. However, whether S100A8/A9 is implicated in microglial‑induced neuroinflammatory response remains unclear. Here, we found that S100A8/A9 significantly increased the secretion of proinflammatory cytokines inclu-ding tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) in cultured BV-2 microglial cells. Inhibition of the Toll-like receptor 4 (TLR4) and the receptor for advanced glycation end-products (RAGE) with C225 and a RAGE-blocking antibody, respectively significantly reduced the secretion of TNF-α and IL-6 from S100A8/A9-stimulated BV-2 microglial cells...
July 2017: International Journal of Molecular Medicine
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