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Dimitris Theofilatos, Panagiotis Fotakis, Efi Valanti, Despina Sanoudou, Vassilis Zannis, Dimitris Kardassis
BACKGROUND: High Density Lipoprotein (HDL) and its main protein component, apolipoprotein A-I (apoA-I) have numerous atheroprotective functions on various tissues including the endothelium. Therapies based on reconstituted HDL containing apoA-I (rHDL-apoA-I) have been used successfully in patients with acute coronary syndrome, peripheral vascular disease or diabetes but very little is known about the genomic effects of rHDL-apoA-I and how they could contribute to atheroprotection. OBJECTIVE: The present study aimed to understand the endothelial signaling pathways and the genes that may contribute to rHDL-apoA-I-mediated atheroprotection...
June 18, 2018: Metabolism: Clinical and Experimental
Witold Kolber, Paulina Dumnicka, Małgorzata Maraj, Beata Kuśnierz-Cabala, Piotr Ceranowicz, Michał Pędziwiatr, Barbara Maziarz, Małgorzata Mazur-Laskowska, Marek Kuźniewski, Mateusz Sporek, Jerzy Walocha
Acute pancreatitis (AP) in most patients takes a course of self-limiting local inflammation. However, up to 20% of patients develop severe AP (SAP), associated with systemic inflammation and/or pancreatic necrosis. Early prediction of SAP allows for the appropriate intensive treatment of severe cases, which reduces mortality. Serum interleukin-6 (IL-6) has been proposed as a biomarker to assist early diagnosis of SAP, however, most data come from studies utilizing IL-6 measurements with ELISA. Our aim was to verify the diagnostic usefulness of IL-6 for the prediction of SAP, organ failure, and need for intensive care in the course of AP using a fully automated assay...
June 20, 2018: International Journal of Molecular Sciences
Kang Qi, Xiangdong Li, Yongjian Geng, Hehe Cui, Chen Jin, Peihe Wang, Yue Li, Yuejin Yang
OBJECTIVE: Endothelial barrier function in the onset and Tongxinluo (TXL) protection of myocardial ischemia/reperfusion (I/R) injury, and TXL can induce the secretion of Angiopoietin-like 4 (Angptl4) in human cardiac microvascular endothelial cells during hypoxia/reoxygenation. We intend to demonstrate whether TXL can attenuate myocardial I/R injury in diabetes, characterized with microvascular endothelial barrier disruption, by induction of Angptl4-mediated protection of endothelial barrier integrity...
2018: PloS One
Özgür Altun, Okan Dikker, Yücel Arman, Bilal Ugurlukisi, Orkide Kutlu, Eylem Ozgun Cil, Sengul Aydin Yoldemir, Murat Akarsu, Mustafa Ozcan, Semih Kalyon, Neslihan Ozsoy, Tufan Tükek
OBJECTIVES: Angiopoietin-like peptide 4 (ANGPTL-4) plays an important role in lipid metabolism by inhibiting the enzyme lipoprotein lipase. This effect of ANGPTL-4 results in suppression of the release of plasma triglyceride-derived fatty acids. Increase in fatty acid levels entering to the liver and abnormalities in their secretion is one of the main mechanisms in pathogenesis of hepatic steatosis. In this study, we aimed to investigate the role of ANGPTL-4 in pathogenesis of hepatic steatosis by determining its levels in patients with fatty liver disease...
June 13, 2018: Cytokine
Ichitaro Abe, Yasushi Teshima, Hidekazu Kondo, Haruka Kaku, Shintaro Kira, Yuki Ikebe, Shotaro Saito, Akira Fukui, Tetsuji Shinohara, Kunio Yufu, Mikiko Nakagawa, Naoki Hijiya, Masatsugu Moriyama, Tatsuo Shimada, Shinji Miyamoto, Naohiko Takahashi
BACKGROUND: Epicardial adipose tissue (EAT) is associated with atrial fibrillation (AF), but the underlying mechanisms remain to be fully elucidated. OBJECTIVE: Using human left atrial appendage (LAA) samples, we examined the interactive relationship between the EAT profile and atrial myocardial fibrosis through histological and biochemical analyses. METHODS: LAA samples were obtained from 59 consecutive AF patients during cardiovascular surgery...
June 13, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Yang Li, JianMin Liang, Juan Hu, Xiaoyong Ren, Ying Sheng
Human cholesteatoma perimatrix fibroblasts (hCPFs) can stimulate the endothelial cells of nearby microvessels to proliferate and migrate in a paracrine manner. Exosomes, secreted from various cell types, are one of the most important paracrine factors and play critical roles in intercellular communication. However, whether exosomes derived from human cholesteatoma perimatrix fibroblasts (hCPFs-Exo) can promote angiogenesis has not been reported. In this study, we isolated exosomes secreted by hCPFs and observed that hCPFs-Exo was able to promote migration and tube formation in human umbilical vein endothelial cells (HUVECs)...
June 15, 2018: Cell Biology International
Viktoria Gusarova, Colm O'Dushlaine, Tanya M Teslovich, Peter N Benotti, Tooraj Mirshahi, Omri Gottesman, Cristopher V Van Hout, Michael F Murray, Anubha Mahajan, Jonas B Nielsen, Lars Fritsche, Anders Berg Wulff, Daniel F Gudbjartsson, Marketa Sjögren, Connor A Emdin, Robert A Scott, Wen-Jane Lee, Aeron Small, Lydia C Kwee, Om Prakash Dwivedi, Rashmi B Prasad, Shannon Bruse, Alexander E Lopez, John Penn, Anthony Marcketta, Joseph B Leader, Christopher D Still, H Lester Kirchner, Uyenlinh L Mirshahi, Amr H Wardeh, Cassandra M Hartle, Lukas Habegger, Samantha N Fetterolf, Teresa Tusie-Luna, Andrew P Morris, Hilma Holm, Valgerdur Steinthorsdottir, Patrick Sulem, Unnur Thorsteinsdottir, Jerome I Rotter, Lee-Ming Chuang, Scott Damrauer, David Birtwell, Chad M Brummett, Amit V Khera, Pradeep Natarajan, Marju Orho-Melander, Jason Flannick, Luca A Lotta, Cristen J Willer, Oddgeir L Holmen, Marylyn D Ritchie, David H Ledbetter, Andrew J Murphy, Ingrid B Borecki, Jeffrey G Reid, John D Overton, Ola Hansson, Leif Groop, Svati H Shah, William E Kraus, Daniel J Rader, Yii-Der I Chen, Kristian Hveem, Nicholas J Wareham, Sekar Kathiresan, Olle Melander, Kari Stefansson, Børge G Nordestgaard, Anne Tybjærg-Hansen, Goncalo R Abecasis, David Altshuler, Jose C Florez, Michael Boehnke, Mark I McCarthy, George D Yancopoulos, David J Carey, Alan R Shuldiner, Aris Baras, Frederick E Dewey, Jesper Gromada
Angiopoietin-like 4 (ANGPTL4) is an endogenous inhibitor of lipoprotein lipase that modulates lipid levels, coronary atherosclerosis risk, and nutrient partitioning. We hypothesize that loss of ANGPTL4 function might improve glucose homeostasis and decrease risk of type 2 diabetes (T2D). We investigate protein-altering variants in ANGPTL4 among 58,124 participants in the DiscovEHR human genetics study, with follow-up studies in 82,766 T2D cases and 498,761 controls. Carriers of p.E40K, a variant that abolishes ANGPTL4 ability to inhibit lipoprotein lipase, have lower odds of T2D (odds ratio 0...
June 13, 2018: Nature Communications
Xuegu Xu, Yonghao Cai, Yinfei Yu
The aim of the present study was to investigate the therapeutic effects of carbamyl erythropoietin (CEPO) and safflor yellow (SY) in the treatment of rats with diabetic retinopathy (DR) as well as exploring the mechanism of action. Male SD rats were used to establish a diabetes model and streptozotocin-induced retinopathy was also performed in rats. A total of 126 rats with DR were obtained, and model rats were randomly divided into the model (n=42), experimental (n=42) and control (n=42) groups. The rats in the model group were injected with saline, the rats in the experimental group were treated with CEPO, and the rats in the control group were treated with SY...
July 2018: Experimental and Therapeutic Medicine
Kátia Ladeira, Filipa Macedo, Adhemar Longatto-Filho, Sandra F Martins
Esophageal cancer has an aggressive behavior with rapid tumor mass growth and frequently poor prognosis; it is known as one of the most fatal types of cancer worldwide. The identification of potential molecular markers that can predict the response to treatment and the prognosis of this cancer has been subject of a vast investigation in the recent years. Among several molecules, various angiogenic factors that are linked to the tumor development, growth, and invasion, such as VEGF, HGF, angiopoietin-2, IL-6, and TGF-B1, were investigated...
April 2018: Esophagus: Official Journal of the Japan Esophageal Society
Fiorimanti Mariana Rita, Rabaglino María Belén, Cristofolini Andrea Lorena, Merkis Cecilia Inés
Angiopoietins (Ang-1, Ang-2) participate in vascular development and placental growth, both bind to Tie-2. This study aimed to determine the localization of angiopoietins in placental development of sows by immunohistochemistry and to validate the gene expression during gestation through a bioinformatic approach. Samples were collected from fifteen maternal-fetal interface from approximately 30 (n = 5), 60 (n = 5) and 114 (n = 5) days of gestation for immunohistochemistry. A bioinformatic approach was performed by re-analysis of public datasets to determine the increase or decrease of genes involved in angiogenesis during pregnancy...
June 2, 2018: Animal Reproduction Science
Dick C Chan, Gerald F Watts, Ransi Somaratne, Scott M Wasserman, Rob Scott, P Hugh R Barrett
OBJECTIVE: Inhibition of PCSK9 (proprotein convertase subtilisin/kexin type 9) and statins are known to lower plasma LDL (low-density lipoprotein)-cholesterol concentrations. However, the comparative effects of these treatments on the postprandial metabolism of TRLs (triglyceride-rich lipoproteins) remain to be investigated. APPROACH AND RESULTS: We performed a 2-by-2 factorial trial of the effects of 8 weeks of subcutaneous evolocumab (420 mg every 2 weeks) and atorvastatin (80 mg daily) on postprandial TRL metabolism in 80 healthy, normolipidemic men after ingestion of an oral fat load...
June 7, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
Fabrice Schneider, Pierre-Jean Saulnier, Elise Gand, Mathieu Desvergnes, Nicolas Lefort, Eric Thorin, Nathalie Thorin-Trescases, Kamel Mohammedi, Stéphanie Ragot, Jean-Baptiste Ricco, Samy Hadjadj
BACKGROUND: Patients with type 2 diabetes (T2D) face a high amputation rate. We investigated the relationship between the level of amputation and the presence of micro or macro-vascular disease and related circulating biomarkers, Tumor Necrosis Factor Receptor 1 (TNFR1) and Angiopoietin like-2 protein (ANGPTL2). METHODS: We have analyzed data from 1468 T2D participants in a single center prospective cohort (the SURDIAGENE cohort). Our outcome was the occurrence of lower limb amputation categorized in minor (below-ankle) or major (above ankle) amputation...
June 8, 2018: Cardiovascular Diabetology
Cian P McCarthy, Nasrien E Ibrahim, Roland R J van Kimmenade, Hanna K Gaggin, Mandy L Simon, Parul Gandhi, Noreen Kelly, Shweta R Motiwala, Renata Mukai, Craig A Magaret, Grady Barnes, Rhonda F Rhyne, Joseph M Garasic, James L Januzzi
BACKGROUND: Peripheral arterial disease (PAD) is a global health problem that is frequently underdiagnosed and undertreated. Non-invasive tools to predict the presence and severity of PAD have limitations including inaccuracy, cost, or need for intravenous contrast and ionizing radiation. HYPOTHESIS: A clinical/biomarker score may offer an attractive alternative diagnostic method. METHODS: In a prospective cohort of 354 patients referred for diagnostic peripheral and/or coronary angiography, predictors of ≥50% stenosis in at least one peripheral vessel (carotid/subclavian, renal, or lower extremity) were identified from over fifty clinical variables and 109 biomarkers...
June 6, 2018: Clinical Cardiology
Bridget E Barber, Matthew J Grigg, Kim A Piera, Timothy William, Daniel J Cooper, Katherine Plewes, Arjen M Dondorp, Tsin W Yeo, Nicholas M Anstey
Plasmodium knowlesi occurs throughout Southeast Asia, and is the most common cause of human malaria in Malaysia. Severe disease in humans is characterised by high parasite biomass, reduced red blood cell deformability, endothelial activation and microvascular dysfunction. However, the roles of intravascular haemolysis and nitric oxide (NO)-dependent endothelial dysfunction, important features of severe falciparum malaria, have not been evaluated, nor their role in acute kidney injury (AKI). In hospitalised Malaysian adults with severe (n = 48) and non-severe (n = 154) knowlesi malaria, and in healthy controls (n = 50), we measured cell-free haemoglobin (CFHb) and assessed associations with the endothelial Weibel-Palade body (WPB) constituents, angiopoietin-2 and osteoprotegerin, endothelial and microvascular function, and other markers of disease severity...
June 6, 2018: Emerging Microbes & Infections
Anna M Randi, Koval E Smith, Giancarlo Castaman
Several important physiological processes, from permeability to inflammation to haemostasis, take place at the vessel wall and are regulated by endothelial cells (EC). Thus, proteins that have been identified as regulators of one process are increasingly found to be involved in other vascular functions. Such is the case for Von Willebrand Factor (VWF), a large glycoprotein best known for its critical role in haemostasis. In vitro and in vivo studies have shown that lack of VWF causes enhanced vascularisation, both constitutively and following ischemia...
June 4, 2018: Blood
Maciej Wiewiora, Anna Mertas, Alicja Nowowiejska-Wiewiora, Andrzej Kozlowski, Zenon Czuba, Jerzy Piecuch
BACKGROUND: It is known that obesity is associated with alterations in blood rheology and venous hemodynamics. Another recent study has confirmed that adipose tissue is actively involved in angiogenesis through secretion of biologically active substances. OBJECTIVE: The aim of this study was to investigate the impact on the venous haemodynamics of the femoral vein on angiogenesis status in morbidly obese patients. METHODS: We studied venous haemodynamics and angiogenesis in a prospective study of obese and non-obese individuals...
May 25, 2018: Clinical Hemorheology and Microcirculation
Rongna A, Pei Yu, Siyu Hao, Yuzhen Li
Psoriasis is an autoimmune disease characterized by abnormal differentiation and hyper-proliferation of epidermal keratinocytes. The object of the study is to investigate the role of miRNA-876-5p in psoriasis. It reported that MicroRNAs (miRNAs) played roles in the malignant progression in psoriasis development. The expression of miR-876-5p was found to be down-regulated in psoriasic tissue and blood of patients. The luciferase assay verified the targeting role of miR-876-5p to 3'UTR of Angiopoietin-1 (Ang-1)...
July 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Zeinab Adel Samy, Lulwa Al-Abdullah, Marian Turcani, James Craik, Zoran Redzic
INTRODUCTION: The precise mechanisms of the inflammatory responses after cerebral ischemia in vivo are difficult to elucidate because of the complex nature of multiple series of interactions between cells and molecules. This study explored temporal patterns of secretion of 30 cytokines and chemokines from Sprague Dawley rat astrocytes in primary culture in order to elucidate signaling pathways that are triggered by astrocytes during anoxia. METHODS: Primary cultures of rat brain astrocytes were incubated for periods of 2-24 hr in the absence of oxygen (anoxia) or under normal partial pressure of oxygen (controls)...
June 4, 2018: Brain and Behavior
P Popova, L Vasilyeva, A Tkachuck, M Puzanov, A Golovkin, Y Bolotko, E Pustozerov, E Vasilyeva, O Li, I Zazerskaya, R Dmitrieva, A Kostareva, E Grineva
Our aim was to study the expression of adipokine-encoding genes (leptin, adiponectin, and angiopoietin-like protein 4 (ANGPTL4)) in human umbilical vein endothelial cells (HUVECs) and adipokine concentration in cord blood from women with gestational diabetes mellitus (GDM) depending on glycaemic targets. GDM patients were randomised to 2 groups per target glycaemic levels: GDM1 (tight glycaemic targets, fasting blood glucose < 5.1 mmol/L and <7.0 mmol/L postprandial, N = 20) and GDM2 (less tight glycaemic targets, <5...
2018: International Journal of Endocrinology
Peeyush K Lala, Pinki Nandi, Mousumi Majumder
Lymphangiogenesis (formation of new lymphatic vessels), unlike angiogenesis, has been a lesser-focused field in cancer biology, because of earlier controversy regarding whether lymphatic metastasis occurs via pre-existing or newly formed lymphatics. Recent evidence reveals that peri-tumoral or intra-tumoral lymphangiogenesis is a precursor for lymphatic metastasis in most carcinomas and melanomas. Two major lymphangiogenic factors, vascular endothelial growth factor (VEGF)-C and VEGF-D, are produced by cancer cells or immune cells such as macrophages in the tumor-stroma to promote sprouting of lymphatics from lymphatic endothelial cells (LEC) or LEC precursors (LECP) by binding to their primary (high affinity) receptor VEGF-R3 or secondary receptors VEGF-R2, neuropilin (NRP)2 and α9/β1 integrin...
June 1, 2018: Cancer Metastasis Reviews
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