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Thrombospondine

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https://www.readbyqxmd.com/read/28345659/oral-chromium-picolinate-impedes-hyperglycemia-induced-atherosclerosis-and-inhibits-proatherogenic-protein-tsp-1-expression-in-stz-induced-type-1-diabetic-apoe-mice
#1
Rituparna Ganguly, Soumyadip Sahu, Vahagn Ohanyan, Rebecca Haney, Ronaldo J Chavez, Shivani Shah, Siri Yalamanchili, Priya Raman
Increasing evidence suggests thrombospondin-1 (TSP-1), a potent proatherogenic matricellular protein, as a putative link between hyperglycemia and atherosclerotic complications in diabetes. We previously reported that the micronutrient chromium picolinate (CrP), with long-standing cardiovascular benefits, inhibits TSP-1 expression in glucose-stimulated human aortic smooth muscle cells in vitro. Here, we investigated the atheroprotective action of orally administered CrP in type 1 diabetic apolipoprotein E-deficient (ApoE(-/-)) mice and elucidated the role of TSP-1 in this process...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28339036/fgf7-fgfr2-signal-promotes-invasion-and-migration-in-human-gastric-cancer-through-upregulation-of-thrombospondin-1
#2
Tingting Huang, Lei Wang, Dian Liu, Piao Li, Huihua Xiong, Liang Zhuang, Li Sun, Xianglin Yuan, Hong Qiu
Fibroblast growth factor 7 (FGF7) is a mesenchyme-specific heparin-binding growth factor that binds FGF receptor 2 (FGFR2) to regulate numerous cellular and physiological processes. FGF7/FGFR2 signal is associated with gastric cancer progression. In the present study, we investigated the molecular mechanism by which FGF7/FGFR2 promotes invasion and migration in human gastric cancer. We first demonstrated that increased FGFR2 expression in human gastric cancer tissues was significantly associated with tumor depth and clinical stage in human gastric cancer tissues...
March 22, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28330618/latexin-inactivation-enhances-survival-and-long-term-engraftment-of%C3%A2-hematopoietic-stem-cells-and-expands-the-entire-hematopoietic-system-in-mice
#3
Yi Liu, Cuiping Zhang, Zhenyu Li, Chi Wang, Jianhang Jia, Tianyan Gao, Gerhard Hildebrandt, Daohong Zhou, Subbarao Bondada, Peng Ji, Daret St Clair, Jinze Liu, Changguo Zhan, Hartmut Geiger, Shuxia Wang, Ying Liang
Natural genetic diversity offers an important yet largely untapped resource to decipher the molecular mechanisms regulating hematopoietic stem cell (HSC) function. Latexin (Lxn) is a negative stem cell regulatory gene identified on the basis of genetic diversity. By using an Lxn knockout mouse model, we found that Lxn inactivation in vivo led to the physiological expansion of the entire hematopoietic hierarchy. Loss of Lxn enhanced the competitive repopulation capacity and survival of HSCs in a cell-intrinsic manner...
March 7, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28327551/genomic-reprograming-analysis-of-the-mesothelial-to-mesenchymal-transition-identifies-biomarkers-in-peritoneal-dialysis-patients
#4
Vicente Ruiz-Carpio, Pilar Sandoval, Abelardo Aguilera, Patricia Albar-Vizcaíno, María Luisa Perez-Lozano, Guadalupe T González-Mateo, Adrián Acuña-Ruiz, Jesús García-Cantalejo, Pedro Botías, María Auxiliadora Bajo, Rafael Selgas, José Antonio Sánchez-Tomero, Jutta Passlick-Deetjen, Dorothea Piecha, Janine Büchel, Sonja Steppan, Manuel López-Cabrera
Peritoneal dialysis (PD) is an effective renal replacement therapy, but a significant proportion of patients suffer PD-related complications, which limit the treatment duration. Mesothelial-to-mesenchymal transition (MMT) contributes to the PD-related peritoneal dysfunction. We analyzed the genetic reprograming of MMT to identify new biomarkers that may be tested in PD-patients. Microarray analysis revealed a partial overlapping between MMT induced in vitro and ex vivo in effluent-derived mesothelial cells, and that MMT is mainly a repression process being higher the number of genes that are down-regulated than those that are induced...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28326725/-analysis-of-salivary-protease-spectrum-in-chronic-periodontitis
#5
Li Qian, Zhou Xuedong, Fan Yaping, Yang Tengyu, Wu Songtao, Yu Yu, Chen Jiao, Zhang Ping, Feng Yun
OBJECTIVE: This study aimed to investigate the difference in salivary protease expression in patients with chronic periodontitis and normal individuals. METHODS: The stimulating saliva in patients with chronic periodontitis and normal individuals were collected. Protein chip technology was adapted to analyze salivary protease spectrum. RESULTS: Among the 34 proteases in the chip, disintegrin and metalloproteinase (ADAM)8, matrix metalloproteinase (MMP)-8, MMP-12, neprilysin/CD10, and uridylyl phosphate adenosine/urokinase showed a significantly increased concentration in the saliva of chronic periodontitis patients compared with those in the saliva of normal individuals (P<0...
February 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28325251/interferon-induced-thrombotic-microangiopathy-tma-analysis-and-concise-review
#6
REVIEW
Ajay Kundra, Jen Chin Wang
Interferon (IFN) has been associated with development of thrombotic microangiopathy including thrombotic thrombocytopenic purpura (TTP) and hemolytic uremic syndrome (HUS). We reviewed literature from the earliest reported association in 1993, to July 2016 and found 68 cases. Analysis of this data shows: (1) Mean age at diagnosis was 47 years (95% CI, 44-50). (2) Majority of cases were seen where IFN was used for the treatment of chronic myelogenous leukemia (CML), multiple sclerosis (MS), chronic hepatitis C virus infection (HCV) and one case each for hairy cell leukemia (HCL) and Sezary syndrome...
April 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28324043/reduced-transforming-growth-factor-beta-activity-in-the-endometrium-of-women-with-heavy-menstrual-bleeding
#7
J A Maybin, L Boswell, V J Young, W C Duncan, Hod Critchley
Context: Heavy menstrual bleeding (HMB) is common and incapacitating. Aberrant menstrual endometrial repair may result in HMB. The TGFβ superfamily contributes to tissue repair, but its role in HMB is unknown. Objective: We hypothesised that TGFβ1 is important for endometrial repair and women with HMB have aberrant TGFβ1 activity at menses. Participants/Setting: Endometrial biopsies were collected from women and menstrual blood loss objectively measured (HMB >80ml/cycle, normal menstrual bleeding, NMB <80ml)...
January 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323501/microarray-based-analysis-of-gene-expression-profiles-in-peripheral-blood-of-patients-with-acute-primary-angle-closure
#8
Jin Wook Jeoung, Jung Hwa Ko, Yu Jeong Kim, Yong Woo Kim, Ki Ho Park, Joo Youn Oh
BACKGROUND: We investigated the expression of molecules in peripheral blood mononuclear cells (PBMCs) and plasma of patients with acute primary angle closure (APAC). MATERIALS AND METHODS: Peripheral blood was collected from patients with APAC (n = 10) and age-matched controls (n = 5). The gene transcription profile was analyzed in PBMCs using microarrays and validated by real-time reverse transcription polymerase chain reaction (RT-PCR). The levels of secreted proteins were evaluated in plasma by ELISA...
March 21, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28316004/effect-of-the-fxa-inhibitors-rivaroxaban-and-apixaban-on-platelet-activation-in-patients-with-atrial-fibrillation
#9
B Steppich, F Dobler, L C Brendel, G Hessling, S L Braun, A L Steinsiek, I Deisenhofer, A Hyseni, M Roest, I Ott
Rivaroxaban and Apixaban, increasingly used for stroke prevention in non-valvular atrial fibrillation (AF), might impact platelet reactivity directly or indirectly. By inhibition of Factor Xa (FXa) they preclude not only generation of relevant thrombin amounts but also block signalling of FXa via protease activated receptors. However, weather FXa-inhibition affects platelet haemostasis remains incompletely known. One hundred and twenty-eight patients with AF on chronic anticoagulation with either Rivaroxaban or Apixaban for at least 4 weeks were included in the study...
March 18, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/28298437/riding-the-metalloproteinase-roller-coaster
#10
Gillian Murphy
To many of us in the field, working on Matrix Metalloproteinases (MMPs) has felt like riding a roller coaster, traveling through times of both excitement and despair. I was fortunate to join the ride when it was a mere carousel of three activities thought to target the proteins that comprise the extracellular matrix (ECM). New technologies brought the thrills of discovery, as we uncovered specific proteinase genes and defined specialised activities in different cellular processes. The MMPs and the sister families of 'A Disintegrin And Metalloproteinase' (ADAMs), ADAMs with ThromboSpondin domains (ADAM-TS) and Astacins are now recognised as key signalling 'scissors' that drive rapid changes in a plethora of cellular pathways...
March 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28296822/the-different-effects-of-vegfa121-and-vegfa165-on-regulating-angiogenesis-depend-on-phosphorylation-sites-of-vegfr2
#11
Wang Shiying, Sun Boyun, Yuan Jianye, Zhang Wanjun, Tao Ping, Lin Jiang, Hu Hongyi
The effects of VEGFA isoforms on the vascular permeability and structure are still unclear. In this study, we found that VEGFA121 and VEGFA165, 2 isoforms of VEGFA, exerted the opposing effects of antiangiogenesis and proangiogenesis on regulating vascular endothelia cells proliferation and tube formation. The 2 isoforms affected the protein expression of Ras-related protein 1-GTPase-activating protein 1 (Rap1GAP) and thrombospondin 1, 2 important signal molecules of Rap1GAP/thrombospondin 1 signal pathway in primary human umbilical vein endothelial cells by regulating 2 different phosphorylating sites of VEGFR2, Tyr(1175) and Tyr(1214)...
April 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28292736/increased-metalloproteinase-activity-in-the-hippocampus-following-status-epilepticus
#12
Deepti Dubey, Paulette A McRae, Elyse K Rankin-Gee, Esther Baranov, Luke Wandrey, Stephanie Rogers, Brenda E Porter
Increased neuronal plasticity and neuronal cell loss has been implicated in the development of epilepsy following injury. Parvalbumin fast spiking inhibitory interneurons have a robust extracellular matrix coating their cell bodies and the proximal dendrites called the perineuronal net (PNN). The role of the PNN is not clear but it has been implicated in closing of the critical period, altering seizure thresholds and providing neuronal protection from oxidative stress. The PNN is susceptible to degradation following a prolonged seizure and there is an increase in proteolytic-fragments of the PNN enriched proteoglycan aggrecan (Dzwonek et al...
March 1, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28290248/the-%C3%AE-2%C3%AE-subunit-and-absence-epilepsy-beyond-calcium-channels
#13
Roberta Celli, Ines Santolini, Michela Guiducci, Gilles van Luijtelaar, Pasquale Parisi, Pasquale Striano, Roberto Gradini, Giuseppe Battaglia, Richard T Ngomba, Ferdinando Nicoletti
Spike-wave discharges, underlying absence seizures, are generated within a cortico-thalamo-cortical network that involves the somatosensory cortex, the reticular thalamic nucleus, and the ventrobasal thalamic nuclei. Activation of T-type voltage-sensitive calcium channels (VSCCs) contributes to the pathological oscillatory activity of this network, and some of the first-line drugs used in the treatment of absence epilepsy inhibit T-type calcium channels. The α2δ subunit is a component of high voltage-activated VSCCs (i...
March 8, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28289916/predicting-tenocyte-expression-profiles-and-average-molecular-concentrations-in-achilles-tendon-ecm-from-tissue-strain-and-fiber-damage
#14
Arash Mehdizadeh, Bruce S Gardiner, Michael Lavagnino, David W Smith
In this study, we propose a method for quantitative prediction of changes in concentrations of a number of key signaling, structural and effector molecules within the extracellular matrix of tendon. To achieve this, we introduce the notion of elementary cell responses (ECRs). An ECR defines a normal reference secretion profile of a molecule by a tenocyte in response to the tenocyte's local strain. ECRs are then coupled with a model for mechanical damage of tendon collagen fibers at different straining conditions of tendon and then scaled up to the tendon tissue level for comparison with experimental observations...
March 13, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28285737/lung-injury-induced-by-bisphenol-a-a-food-contaminant-is-ameliorated-by-selenium-supplementation
#15
Azza S Abedelhaffez, Ebtihal A Abd El-Aziz, Mohamed A Abdel Aziz, Asmaa M Ahmed
Bisphenol A (BPA), a widely used industrial chemical, is known to disrupt endocrine function. This study aimed to investigate the impact of chronic exposure to BPA on the lung tissue of adult male rats as well as any possible alleviating effects resulting from selenium (Se) treatment. Chronic exposure to BPA resulted in prominent inflammation and oxidative stress responses as evidenced by an increase in levels of malondialdehyde (MDA), reduced concentrations of superoxide dismutase (SOD), and upregulation of Interleukin-18 (IL-18) expression in lung tissue...
February 12, 2017: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/28284900/crosstalk-between-glia-extracellular-matrix-and-neurons
#16
REVIEW
Inseon Song, Alexander Dityatev
Extracellular matrix (ECM) molecules in the central nervous system form highly organized ECM structures around cell somata, axon initial segments, and synapses and play prominent roles in early development by guiding cell migration, neurite outgrowth and synaptogenesis, and by regulating closure of the critical period of development, synaptic plasticity and stability, cognitive flexibility, and axonal regeneration in adults. Major components of neural ECM, including chondroitin sulfate proteoglycans (CSPGs), tenascin-R and hyaluronic acid, are synthesized by both neurons and glial cells...
March 8, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28284660/itraq-based-quantitative-proteomics-discovering-potential-serum-biomarkers-in-locoweed-poisoned-rabbits
#17
Jifeng Jiao, Shuai Wang, Ruishi Zhang, Zhiyan Ma, Guofeng Du, Xiaolu Chen, Dayong Tao, Jinxiang Zhao
Locoism threatens the sustainable development of animal husbandry in areas around the world with intensified desertification, especially in the western United States, western China, Canada, and Mexico, among other countries. This study was conducted to discover potential serum biomarkers in locoweed-poisoned rabbits and lay a foundation for early diagnosis of locoism. We performed iTRAQ labeling coupled with two-dimensional liquid chromatography-tandem mass spectrometry (2D LC-MS/MS), comparing locoweed-poisoned rabbits and healthy controls...
March 8, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28282516/f-spondin-negatively-regulates-dental-follicle-differentiation-through-the-inhibition-of-tgf-%C3%AE-activity
#18
Ai Orimoto, Misaki Kurokawa, Keisuke Handa, Masaki Ishikawa, Eisaku Nishida, Makoto Aino, Akio Mitani, Miho Ogawa, Takashi Tsuji, Masahiro Saito
OBJECTIVE: F-spondin is an extracellular matrix (ECM) protein that belongs to the thrombospondin type I repeat superfamily and is a negative regulator of bone mass. We have previously shown that f-spondin is specifically expressed in the dental follicle (DF), which gives rise to the periodontal ligament (PDL) during the tooth root formation stage. To investigate the molecular mechanism of PDL formation, we investigated the function of f-spondin in DF differentiation. DESIGN: The expression patterning of f-spondin in the developing tooth germ was compared with that of periodontal ligament-related genes, including runx2, type I collagen and periostin, by in situ hybridization analysis...
March 1, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28280413/effect-of-oleanolic-acid-on-the-activity-secretion-and-gene-expression-of-matrix-metalloproteinase-3-in-articular-chondrocytes-in-vitro-and-the-production-of-matrix-metalloproteinase-3-in-vivo
#19
Dong-Geun Kang, Hyun Jae Lee, Kun Tae Kim, Sun-Chul Hwang, Choong Jae Lee, Jin Sung Park
In the present study, we tried to examine whether oleanolic acid regulates the activity, secretion and gene expression of matrix metalloproteinase-3 (MMP-3) in primary cultured rabbit articular chondrocytes, as well as the production of MMP-3 in the knee joint of rat to evaluate the potential chondroprotective effect of oleanolic acid. Rabbit articular chondrocytes were cultured in a monolayer, and reverse transcription-polymerase chain reaction (RT-PCR) was used to measure interleukin-1β (IL-1β)-induced gene expression of MMP-3, MMP-1, MMP-13, a disintegrin and metalloproteinase with thrombospondin motifs-4 (ADAMTS-4), ADAMTS-5 and type II collagen...
March 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28279966/plasmin-cleaves-von-willebrand-factor-at-k1491-r1492-in-the-a1-a2-linker-region-in-a-shear-and-glycan-dependent-manner-in-vitro
#20
Teresa M Brophy, Soracha E Ward, Thomas R McGimsey, Sonja Schneppenheim, Clive Drakeford, Jamie M O'Sullivan, Alain Chion, Ulrich Budde, James S O'Donnell
OBJECTIVE: Previous studies have demonstrated a role for plasmin in regulating plasma von Willebrand factor (VWF) multimer composition. Moreover, emerging data have shown that plasmin-induced cleavage of VWF is of particular importance in specific pathological states. Interestingly, plasmin has been successfully used as an alternative to ADAMTS13 (a disintegrin and metalloproteinase with thrombospondin type 1 motif) in a mouse model of thrombotic thrombocytopenic purpura. Consequently, elucidating the molecular mechanisms through which plasmin binds and cleaves VWF is not only of basic scientific interest but also of direct clinical importance...
March 9, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
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