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Angiopoietins

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https://www.readbyqxmd.com/read/28818232/review-of-the-endothelial-pathogenic-mechanism-of-tie2-related-venous-malformation
#1
REVIEW
Zhong Du, JiaWei Zheng, ZhiYuan Zhang, YanAn Wang
BACKGROUND: Venous malformation (VM) is a type of disease involving vascular morphogenesis in humans. Clinically, VM can be sporadic or inherited. TIE2, also known as TEK or HYK, is a member of the receptor tyrosine kinase subfamily and is highly conserved among species. In 1996, an arginine-to-tryptophan substitution at position 849 (R849W) in TIE2 was found to induce hereditary VM. Additional alterations in TIE2 involved in the pathogenesis of inherited or sporadic VM have since been reported...
September 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28814331/circulating-levels-of-soluble-fas-scd95-are-associated-with-risk-for-development-of-a-nonresolving-acute-kidney-injury-subphenotype
#2
Pavan K Bhatraju, Cassianne Robinson-Cohen, Carmen Mikacenic, Susanna Harju-Baker, Victoria Dmyterko, Natalie S J Slivinski, W Conrad Liles, Jonathan Himmelfarb, Susan R Heckbert, Mark M Wurfel
BACKGROUND: Critically ill patients with acute kidney injury (AKI) can be divided into two subphenotypes, resolving or nonresolving, on the basis of the trajectory of serum creatinine. It is unknown if the biology underlying these two AKI recovery patterns is different. METHODS: We measured eight circulating biomarkers in plasma obtained from a cohort of patients admitted to an intensive care unit (ICU) (n = 1241) with systemic inflammatory response syndrome...
August 17, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28806447/homocysteine-facilitates-prominent-polygonal-angiogenetic-networks-of-a-choroidal-capillary-sprouting-model
#3
Yih-Jing Lee, Chien-Chao Chiu, Chia-Ying Ke, Ni Tien, Po-Kang Lin
Purpose: To investigate the effects of homocysteine on choroidal angiogenesis, we established an ex vivo choroidal sprouting explant model and examined the potential growth factors for angiogenesis. Methods: Choroid fragments with retinal pigment epithelium were isolated from mouse and embedded in Matrigel. Homocysteine at different concentrations were added to the culture mediums. The choroidal explants were observed at different time points, and the total area of choroidal sprouting was measured and analyzed...
August 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28806218/hypoxemic-patients-with-bilateral-infiltrates-treated-with-high-flow-nasal-cannula-present-a-similar-pattern-of-biomarkers-of-inflammation-and-injury-to-acute-respiratory-distress-syndrome-patients
#4
Marina García-de-Acilu, Judith Marin-Corral, Antonia Vázquez, Laura Ruano, Mònica Magret, Ricard Ferrer, Joan R Masclans, Oriol Roca
OBJECTIVE: To examine whether patients with acute hypoxemia and bilateral opacities treated with high-flow nasal cannula and acute respiratory distress syndrome patients who were directly mechanically ventilated are similar in terms of lung epithelial, endothelial, and inflammatory biomarkers. DESIGN: Prospective, multicenter study. SETTING: ICUs at three university tertiary hospitals. PATIENTS: Intubated and nonintubated patients admitted to the ICU with acute hypoxemia (PaO2/FIO2 ≤ 300) and bilateral opacities...
August 10, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28800750/angiopoietin-1-deficiency-increases-tumor-metastasis-in-mice
#5
Iacovos P Michael, Martina Orebrand, Marta Lima, Beatriz Pereira, Olga Volpert, Susan E Quaggin, Marie Jeansson
BACKGROUND: Angipoietin-1 activation of the tyrosine kinase receptor Tek expressed mainly on endothelial cells leads to survival and stabilization of endothelial cells. Studies have shown that Angiopoietin-1 counteracts permeability induced by a number of stimuli. Here, we test the hypothesis that loss of Angiopoietin-1/Tek signaling in the vasculature would increase metastasis. METHODS: Angiopoietin-1 was deleted in mice just before birth using floxed Angiopoietin-1 and Tek mice crossed to doxycycline-inducible bitransgenic ROSA-rtTA/tetO-Cre mice...
August 11, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28795637/do-angptl-4-and-galectin-3-reflect-the-severity-of-coronary-artery-disease
#6
Luxitaa Goenka, Melvin George, Vishakha Singh, Amrita Jena, Deepika Seshadri, Vasanth Karunakaran, Dhandapani Vellala Elumalai, Jamuna Rani, Ilango Kaliappan
BACKGROUND: Coronary artery disease (CAD) is one of the leading causes of mortality and morbidity worldwide. We thereby sought to investigate whether the biomarkers, angiopoietin-like 4 (ANGPTL-4) and galectin-3, reflect the severity of CAD. METHODS: Patients were screened based on inclusion/exclusion criteria and written informed consent was obtained from the patients. Serum ANGPTL-4 and galectin-3 was quantified using enzyme-linked immunosorbent assay (ELISA) and correlated with the Global Registry of Acute Coronary Events (GRACE) and GENSINI score using Spearman's rank correlation coefficient and multivariate analysis...
August 1, 2017: Therapeutic Advances in Cardiovascular Disease
https://www.readbyqxmd.com/read/28793833/synergistic-therapeutic-effect-of-three-dimensional-stem-cell-clusters-and-angiopoietin-1-on-promoting-vascular-regeneration-in-ischemic-region
#7
Jungmi Kang, Jeong-Kee Yoon, Seung Ja Oh, Byung-Soo Kim, Sang-Heon Kim
Peripheral artery disease (PAD) is an ischemic disease characterized by reduced blood flow to the legs, feet, and hands. Human mesenchymal stem cells (MSCs) are an attractive cell source to treat PAD in regenerative medicine. However, in clinical applications, the use of adult stem cells has several limitations, such as low cell viability and low therapeutic efficiency. In the present study, we described an innovative method of culturing three-dimensional stem cell clusters (AngioclusterTM, AC), demonstrated the potential for ACs to differentiate into vascular cells, and assessed the synergistic effects of ACs and angiopoietin-1 (Ang-1) on angiogenesis in ischemic animal models...
August 10, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28793186/an-engineered-optogenetic-switch-for-spatiotemporal-control-of-gene-expression-cell-differentiation-and-tissue-morphogenesis
#8
Lauren Polstein, Mark Juhas, Gabi Hanna, Nenad Bursac, Charles A Gersbach
The precise spatial and temporal control of gene expression, cell differentiation, and tissue morphogenesis has widespread application in regenerative medicine and the study of tissue development. In this work, we applied optogenetics to control cell differentiation and new tissue formation. Specifically, we engineered an optogenetic "on" switch that provides permanent transgene expression following a transient dose of blue light illumination. To demonstrate its utility in controlling cell differentiation and reprogramming, we incorporated an engineered form of the master myogenic factor MyoD into this system in multipotent cells...
August 9, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28791669/strategies-for-preventing-peritoneal-fibrosis-in-peritoneal-dialysis-patients-new-insights-based-on-peritoneal-inflammation-and-angiogenesis
#9
REVIEW
Zhen Zhang, Na Jiang, Zhaohui Ni
Peritoneal dialysis (PD) is an established form of renal replacement therapy. Long-term PD leads to morphologic and functional changes to the peritoneal membrane (PM), which is defined as peritoneal fibrosis, a known cause of loss of peritoneal ultrafiltration capacity. Inflammation and angiogenesis are key events during the pathogenesis of peritoneal fibrosis. This review discusses the pathophysiology of peritoneal fibrosis and recent research progress on key fibrogenic molecular mechanisms in peritoneal inflammation and angiogenesis, including Toll-like receptor ligand-mediated, NOD-like receptor protein 3/interleukin-1β, vascular endothelial growth factor, and angiopoietin-2/Tie2 signaling pathways...
August 8, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28780894/gene-therapy-for-hypertension
#10
Ludovit Paulis, Heinrich Franke, Fedor Simko
The control of hypertension and the resulting cardiovascular events is still insufficient. Thus, the search for novel means for blood pressure (BP) reduction remains worth further clinical and research attention. The advances in vector and construct design sketch the use of gene therapy in hypertension. Areas covered: The authors have searched for studies using gene therapy in hypertension reporting BP outcomes. They have identified 63 experimental studies demonstrating feasible targeting of the classical and new renin-angiotensin-aldosterone system, β1-adrenergic receptor, NO-cGMP axis, endothelin, natriuretic peptides, kallikrein system, cytochrome P-450 hydroxylase, oncogenes, growth factors, interleukins, angiopoietin-1, adrenomedullin or Klotho in small rodents...
August 7, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/28766001/dynamic-contrast-enhanced-magnetic-resonance-imaging-parameters-correlate-with-advanced-revised-iss-and-angiopoietin-1-angiopoietin-2-ratio-in-patients-with-multiple-myeloma
#11
Evangelos Terpos, Dimitris Matsaridis, Vassilis Koutoulidis, Flora Zagouri, Dimitrios Christoulas, Sophia Fontara, Evangelia Panourgias, Maria Gavriatopoulou, Efstathios Kastritis, Meletios A Dimopoulos, Lia A Moulopoulos
The aim of the study was to assess the value of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in patients with newly diagnosed multiple myeloma (MM) who were treated with novel anti-myeloma agents. We studied 60 previously untreated MM patients at diagnosis, 14 with smoldering MM (SMM) and 5 with MGUS. All patients underwent MRI of the thoracolumbar spine and pelvis before the administration of any kind of therapy, and DCE-MRI was performed. The MRI perfusion parameters evaluated were wash-in (WIN), washout (WOUT), time-to-peak (TTPK), time-to-maximum slope (TMSP), and the WIN/TMSP ratio...
August 1, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28759961/lumbar-sympathectomy-regulates-vascular-cell-turnover-in-rat-hindfoot-plantar-skin
#12
Zhifang Zheng, Yu Wan, Yishu Liu, Lulu Zhu, Jianbing Tang, Wenhua Huang, Biao Cheng
BACKGROUND: Sympathetic denervation and impaired angiogenesis cause skin diseases. However, the relationship between the sympathetic nervous system and vascular cell turnover in normal skin remains unclear. OBJECTIVE: To determine the effects of sympathetic denervation on vascular cell turnover in normal skin. METHODS: Rats underwent bilateral L2-4 sympathetic trunk resection (sympathectomy group) or sham operation (control). Hindfoot plantar skin was analyzed 2 weeks and 3 months postoperatively...
July 25, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28757617/nilotinib-induced-vasculopathy-identification-of-vascular-endothelial-cells-as-a-primary-target-site
#13
E Hadzijusufovic, K Albrecht-Schgoer, K Huber, G Hoermann, F Grebien, G Eisenwort, W Schgoer, S Herndlhofer, C Kaun, M Theurl, W R Sperr, U Rix, I Sadovnik, B Jilma, G H Schernthaner, J Wojta, D Wolf, G Superti-Furga, R Kirchmair, P Valent
The BCR/ABL1 inhibitor Nilotinib is increasingly used to treat patients with chronic myeloid leukemia (CML). Although otherwise well-tolerated, Nilotinib has been associated with the occurrence of progressive arterial occlusive disease (AOD). Our objective was to determine the exact frequency of AOD and examine in vitro and in vivo effects of Nilotinib and Imatinib on endothelial cells to explain AOD-development. In contrast to Imatinib, Nilotinib was found to upregulate pro-atherogenic adhesion-proteins (ICAM-1, E-selectin, VCAM-1) on human endothelial cells...
July 31, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28754390/bariatric-surgery-induced-lower-angiopoietin-like-2-protein-is-associated-with-improved-cardiometabolic-profile
#14
Marie-Eve Piché, Nathalie Thorin-Trescases, Audrey Auclair, Simon Marceau, Julie Martin, Annik Fortier, Eric Thorin, Paul Poirier
BACKGROUND: Plasma angiopoietin-like 2 (Angptl2), a proinflammatory protein, has been associated with obesity and diabetes. Whether weight loss induced by bariatric surgery and associated improvement of the cardiometabolic risk profile influence circulating Angptl2 levels is unknown. We tested whether biliopancreatic diversion with duodenal switch (BPD-DS) surgery alters plasma Angptl2 concentrations. METHODS: Severely obese patients (n = 73; body mass index: 49...
August 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28752045/angiopoietin-like-4-directs-uptake-of-dietary-fat-away-from-adipose-during-fasting
#15
Emily M Cushing, Xun Chi, Kelli L Sylvers, Shwetha K Shetty, Matthew J Potthoff, Brandon S J Davies
OBJECTIVE: Angiopoietin-like 4 (ANGPTL4) is a fasting-induced inhibitor of lipoprotein lipase (LPL) and a regulator of plasma triglyceride metabolism. Here, we examined the kinetics of Angptl4 induction and tested the hypothesis that ANGPTL4 functions physiologically to reduce triglyceride delivery to adipose tissue during nutrient deprivation. METHODS: Gene expression, LPL activity, and triglyceride uptake were examined in fasted and fed wild-type and Angptl4(-/-) mice...
August 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28751444/pediatric-phase-1-trial-and-pharmacokinetic-study-of-trebananib-in-relapsed-solid-tumors-advl1115-a-children-s-oncology-group-phase-1-consortium-report
#16
Sarah E S Leary, Julie R Park, Joel M Reid, Andrew T Ralya, Sylvain Baruchel, Bing Wu, Timothy P L Roberts, Xiaowei Liu, Charles G Minard, Elizabeth Fox, Brenda J Weigel, Susan Blaney
Trebananib is a first-in-class anti-angiogenic peptibody (peptide-Fc fusion protein) that inhibits Angiopoietin 1 and 2. A pediatric phase 1 trial was performed to define trebananib dose limiting toxicities (DLT), recommended phase 2 dose (RP2D) and pharmacokinetics (PK).<br /><br />Experimental Design: Trebananib was administered by weekly infusion. Three dose levels (10, 15 or 30 mg/kg/dose) were evaluated using a rolling-six design. Part 2 evaluated a cohort of subjects with primary central nervous system (CNS) tumors...
July 27, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28751152/human-umbilical-cord-blood-derived-mesenchymal-stromal-cells-and-small-intestinal-submucosa-hydrogel-composite-promotes-combined-radiation-wound-healing-of-mice
#17
Changsun Lee, Sehwan Shim, Hyosun Jang, Hyunwook Myung, Janet Lee, Chang-Hwan Bae, Jae Kyung Myung, Min-Jung Kim, Seung Bum Lee, Won-Suk Jang, Sun-Joo Lee, Hwi-Yool Kim, Seung-Sook Lee, Sunhoo Park
BACKGROUND AIMS: Mesenchymal stromal cells (MSCs) are a promising agent for treating impaired wound healing, and their therapeutic potential may be enhanced by employing extracellular matrix scaffolds as cell culture scaffolds or transplant cell carriers. Here, we evaluated the effect of human umbilical cord blood-derived (hUCB)-MSCs and a porcine small intestinal submucosa (SIS)-derived extracellular matrix scaffold in a combined radiation-wound mouse model of impaired wound healing...
July 24, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28750175/kaposi-s-sarcoma-associated-herpesvirus-infection-promotes-differentiation-and-polarization-of-monocytes-into-tumor-associated-macrophages
#18
Natarajan Bhaskaran, Santosh K Ghosh, Xiaolan Yu, Sanhai Qin, Aaron Weinberg, Pushpa Pandiyan, Fengchun Ye
Tumor associated macrophages (TAMs) promote angiogenesis, tumor invasion and metastasis, and suppression of anti-tumor immunity. These myeloid cells originate from monocytes, which differentiate into TAMs upon exposure to the local tumor microenvironment. We previously reported that Kaposi's sarcoma-associated herpes virus (KSHV) infection of endothelial cells induces the cytokine angiopoietin-2 (Ang-2) to promote migration of monocytes into tumors. Here we report that KSHV infection of endothelial cells induces additional cytokines including interleukin-6 (IL-6), interleukin-10 (IL-10), and interleukin-13 (IL-13) that drive monocytes to differentiate and polarize into TAMs...
July 27, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28746898/circulating-levels-of-the-angiogenesis-mediators-endoglin-hb-egf-bmp-9-and-fgf-2-in-patients-with-severe-sepsis-and-septic-shock
#19
Vanessa Boury Faiotto, Daniel Franci, Rodolfo Monteiro Enz Hubert, Gleice Regina de Souza, Maiara Marx Luz Fiusa, Bidossessi Wilfried Hounkpe, Thiago Martins Santos, Marco Antonio Carvalho-Filho, Erich Vinicius De Paula
PURPOSE: Endothelial barrier dysfunction is a hallmark of sepsis, and is at least partially mediated by pathways that regulate endothelial barrier assembly during angiogenesis. Not surprisingly, increased levels of key angiogenic proteins such as VEGF-A and Angiopoietin-2 have been described in sepsis. The purpose of this study was to investigate if additional pathways that regulate endothelial barrier integrity during angiogenesis could also be involved in the host response of sepsis...
July 17, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28745316/elevation-of-adenylate-energy-charge-by-angiopoietin-like-4-enhances-epithelial-mesenchymal-transition-by-inducing-14-3-3%C3%AE-expression
#20
Z Teo, M K Sng, J S K Chan, M M K Lim, Y Li, L Li, T Phua, J Y H Lee, Z W Tan, P Zhu, N S Tan
Metastatic cancer cells acquire energy-intensive processes including increased invasiveness and chemoresistance. However, how the energy demand is met and the molecular drivers that coordinate an increase in cellular metabolic activity to drive epithelial-mesenchymal transition (EMT), the first step of metastasis, remain unclear. Using different in vitro and in vivo EMT models with clinical patient's samples, we showed that EMT is an energy-demanding process fueled by glucose metabolism-derived adenosine triphosphate (ATP)...
July 24, 2017: Oncogene
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