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Angiopoietin

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https://www.readbyqxmd.com/read/29792163/different-patterns-of-inflammatory-and-angiogenic-factors-are-associated-with-peritoneal-small-solute-transport-and-peritoneal-protein-clearance-in-peritoneal-dialysis-patients
#1
Yuanyuan Shi, Hao Yan, Jiangzi Yuan, He Zhang, Jiaying Huang, Zhaohui Ni, Jiaqi Qian, Wei Fang
BACKGROUND: Both peritoneal small solute transport and peritoneal protein clearance are closely linked to outcomes in peritoneal dialysis (PD) patients. However, the associated factors of these two components are not fully understood so far. This study aimed to investigate the association between a panel of systemic and peritoneal inflammatory and angiogenic factors and peritoneal solute transport properties. METHODS: Stable PD patients in PD center of Renji Hospital, School of Medicine, Shanghai Jiao Tong University were enrolled in present study...
May 23, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29791855/myocardial-angiopoietin-1-controls-atrial-chamber-morphogenesis-by-spatiotemporal-degradation-of-cardiac-jelly
#2
Kyun Hoo Kim, Yoshikazu Nakaoka, Hellmut G Augustin, Gou Young Koh
The four-chamber structure of the mammalian heart is established during embryonic development. While key regulators for ventricular development are well studied, regulatory mechanisms for atrial chamber morphogenesis remain poorly understood. Here, we found that angiopoietin-1 (Angpt1), a vascular maturation factor, is highly and specifically expressed in atrial myocardium during heart development. Loss of myocardial Angpt1 in mouse embryo led to severe impairment in atrial chamber morphogenesis. We revealed that Angpt1 deficiency results in excessive deposition of cardiac jelly, which disturbs regulation of myocardial growth, thereby impairing maturation of atrial chambers...
May 22, 2018: Cell Reports
https://www.readbyqxmd.com/read/29785010/genome-wide-analyses-identify-68-new-loci-associated-with-intraocular-pressure-and-improve-risk-prediction-for-primary-open-angle-glaucoma
#3
Anthony P Khawaja, Jessica N Cooke Bailey, Nicholas J Wareham, Robert A Scott, Mark Simcoe, Robert P Igo, Yeunjoo E Song, Robert Wojciechowski, Ching-Yu Cheng, Peng T Khaw, Louis R Pasquale, Jonathan L Haines, Paul J Foster, Janey L Wiggs, Chris J Hammond, Pirro G Hysi
Glaucoma is the leading cause of irreversible blindness globally 1 . Despite its gravity, the disease is frequently undiagnosed in the community 2 . Raised intraocular pressure (IOP) is the most important risk factor for primary open-angle glaucoma (POAG)3,4 . Here we present a meta-analysis of 139,555 European participants, which identified 112 genomic loci associated with IOP, 68 of which are novel. These loci suggest a strong role for angiopoietin-receptor tyrosine kinase signaling, lipid metabolism, mitochondrial function and developmental processes underlying risk for elevated IOP...
May 21, 2018: Nature Genetics
https://www.readbyqxmd.com/read/29783932/the-association-of-angiogenic-factors-and-chronic-kidney-disease
#4
Christopher E Anderson, L Lee Hamm, Gem Batuman, Damodar R Kumbala, Chung-Shiuan Chen, Swapna G Kallu, Ravi Siriki, Shilpa Gadde, Myra A Kleinpeter, N Kevin Krane, Eric E Simon, Jiang He, Jing Chen
BACKGROUND: There are limited data on the associations of circulating angiogenic factors with chronic kidney disease (CKD). We investigate the associations of circulating vascular endothelial growth factor (VEGF)-A, angiopoietin-1, angiopoietin-1/VEGF-A ratio, VEGF receptor 1 (VEGFR-1), VEGFR-2, and pentraxin-3 with CKD. METHODS: We recruited 201 patients with CKD and 201 community controls without CKD from the greater New Orleans area. CKD was defined as estimated glomerular filtration rate (eGFR) < 60 mL/min/1...
May 21, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29778674/innate-effector-cells-in-angiogenesis-and-lymphangiogenesis
#5
REVIEW
Gilda Varricchi, Stefania Loffredo, Maria Rosaria Galdiero, Giancarlo Marone, Leonardo Cristinziano, Francescopaolo Granata, Gianni Marone
Angiogenesis and lymphangiogenesis are distinct and complex processes requiring a finely tuned balance between stimulatory and inhibitory signals. During adulthood, angiogenesis and lymphangiogenesis are activated at sites of tumor growth, tissue injury and remodeling, and chronic inflammation. Vascular endothelial growth factors (VEGFs), angiopoietin (ANGPTs) and a multitude of additional signaling molecules play distinct roles in the modulation of angiogenesis/lymphangiogenesis. VEGFs and ANGPTs activate specific tyrosine kinase receptor (e...
May 17, 2018: Current Opinion in Immunology
https://www.readbyqxmd.com/read/29776986/the-characteristics-of-vessel-lining-cells-in-normal-spleens-and-their-role-in-the-pathobiology-of-myelofibrosis
#6
Jiajing Qiu, Mohamed E Salama, Cing Siang Hu, Yan Li, Xiaoli Wang, Ronald Hoffman
The CD34- CD8α+ , sinusoid lining, littoral cells (LCs), and CD34+ CD8α- , splenic vascular endothelial cells (SVECs) represent 2 distinct cellular types that line the vessels within normal spleens and those of patients with myelofibrosis (MF). To further understand the respective roles of LCs and SVECs, each was purified from normal and MF spleens, cultured, and characterized. Gene expression profiling indicated that LCs were a specialized type of SVEC. LCs possessed a distinct gene expression profile associated with cytoskeleton regulation, cellular interactions, endocytosis, and iron transport...
May 22, 2018: Blood Advances
https://www.readbyqxmd.com/read/29774773/mir-711-induced-down-regulation-of-angiopoietin-1-mediates-neuronal-cell-death
#7
Boris Sabirzhanov, Alan Faden, Taryn Aubrecht, Rebecca Henry, Ethan Glaser, Bogdan A Stoica
Angiopoietin-1 (Ang-1) is a well-known endothelial growth factor but its effects on neurons have yet to be elucidated. We show that Ang-1 is rapidly down-regulated in the injured brain after controlled cortical impact (CCI), a mouse experimental TBI model and in etoposide-induced neuronal apoptosis in vitro. Ang-1 treatment inhibits etoposide-induced up-regulation of pro-apoptotic Bcl-2 family members Noxa, Puma, Bim, and Bax; reduces markers of caspase-dependent (cytochrome c release/caspase activation) and caspase-independent (apoptosis-inducing factor release) pathways; and limits neuronal cell death...
May 18, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29774399/endothelial-dysfunction-following-coronary-artery-bypass-grafting-influence-of-patient-and-procedural-factors
#8
J Hadem, R Rossnick, B Hesse, M Herr, M Hansen, A Bergmann, G Kensah, C Maess, H Baraki, P Kümpers, A Lukasz, I Kutschka
BACKGROUND: Angiopoietin-2 (Angpt2) mediates endothelial dysfunction (ED) following coronary artery bypass grafting (CABG). Its triggers are, however, poorly understood. METHODS: We examined the time course of ED beyond the early phase of postoperative recovery in 75 patients following CABG with a special focus on different cardiopulmonary bypass (CPB) modes as potential triggers of Angpt2 release. RESULTS: Nine patients (12.0%) underwent off-pump coronary artery bypass (OPCAB), 31 patients (41...
May 17, 2018: Herz
https://www.readbyqxmd.com/read/29774102/targeting-tie-2-angiopoietin-axis-in-experimental-mesothelioma-confers-differential-responses-and-raises-predictive-implications
#9
Sophia Magkouta, Apostolos Pappas, Ioannis S Pateras, Androniki Kollintza, Charalampos Moschos, Maria-Eleni Vazakidou, Vasiliki Karavana, Vassilis G Gorgoulis, Ioannis Kalomenidis
Malignant pleural mesothelioma is resistant to currently used treatment. Angiopoieitn-1 directly promotes mesothelioma cell growth in a Tie-2-dependent fashion. Angiopoietin/Tie-2 axis may thus be valid targets for therapeutic interventions against mesothelioma. We hypothesized that a soluble angiopoietin inhibitor (Murine Tek-deltaFc) would halt mesothelioma progression in vivo by enhancing mesothelioma cell proliferation and inhibiting tumor angiogenesis. Our hypothesis was challenged on two syngeneic mesothelioma in vivo models (AB1 cells-Balb/c mice and AE17 cells-C57BL/6 mice...
April 24, 2018: Oncotarget
https://www.readbyqxmd.com/read/29768541/vascular-endothelial-growth-factor-association-with-angiopoietin-1-promotes-improvement-in-ventricular-function-after-ischemic-cardiomyopathy-induced-in-mini-pigs
#10
André Lacerda de Abreu Oliveira, Jussara Peters Scheffer, Melissa Markoski, Andreia Koche, Alexsandra Balbinot, Fernanda Antunes, Renato Kalil
PURPOSE: To investigate the safety and clinical, hemodynamic and tissue improvement ability in mini pigs undergoing cell and gene therapy for the treatment of acute myocardial infarction. METHODS: Thirty-two mini pigs Br1 lineage, 12 months old, undergoing induction of acute myocardial infarction by occlusion of the diagonal branch of the paraconal coronary. They were divided into 4 groups: one control group and 3 treatment groups (cell therapy and gene cell therapy)...
April 2018: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/29765998/cloning-expression-purification-and-cd-analysis-of-recombinant-human-betatrophin
#11
Samaneh Gholami, Nematolah Gheibi, Reza Falak, Koorosh Goodarzvand Chegini
Background: Betatrophin is a member of the angiopoietin-like (ANGPTL) family that has been implicated in both triglyceride and glucose metabolism. The physiological functions and molecular targets of this protein remain largely unknown; hence, a purified available protein would aid study of the exact role of betatrophin in lipid or glucose metabolism. Methods: In this study, we cloned the full-length cDNA of betatrophin from a human liver cDNA library. Betatrophin was expressed in the pET-21b- E...
April 2018: Reports of Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/29755348/the-fibrin-cleavage-product-b%C3%AE-15-42-channels-endothelial-and-tubular-regeneration-in-the-post-acute-course-during-murine-renal-ischemia-reperfusion-injury
#12
Dania Fischer, Christopher Seifen, Patrick Baer, Michaela Jung, Christina Mertens, Bertram Scheller, Kai Zacharowski, Rainer Hofmann, Thorsten J Maier, Anja Urbschat
Early and adequate restoration of endothelial and tubular renal function is a substantial step during regeneration after ischemia reperfusion (IR) injury, occurring, e.g., in kidney transplantation, renal surgery, and sepsis. While tubular epithelial cell injury has long been of central importance, recent perception includes the renal vascular endothelium. In this regard, the fibrin cleavage product fibrinopeptide Bβ15-42 mitigate IR injury by stabilizing interendothelial junctions through its affinity to VE-cadherin...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29754072/serum-betatrophin-angiopoietin-like-protein-8-angptl8-levels-in-pregnancies-affected-by-hyperemesis-gravidarum
#13
Burcu Timur, Serap Fırtına Tuncer, Serkan Bodur, Hakan Timur, Aytekin Tokmak, Funda Gucel, Metin Altay
OBJECTIVE: The association between serum betatrophin levels and hyperemesis gravidarum (HEG) remains unknown. The aim of this study was to determine and understand the alterations in serum betatrophin levels in pregnancies complicated by HEG compared with unaffected normal pregnancies. STUDY DESIGN: A cohort study was carried out to evaluate serum betatrophin levels in patients with HEG. Serum betatrophin concentrations were measured with other metabolic markers for lipids and glucose metabolism in 40 singleton pregnancies affected by HEG and 40 gestational age- and body mass index-matched controls...
April 24, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29752428/angiopoietin-like-protein-3-angptl3-deficiency-and-familial-combined-hypolipidemia
#14
Tarugi Patrizia, Bertolini Stefano, Calandra Sebastiano
Three members of the angiopoietin-like (ANGPTL) protein family-ANGPTL3, ANGPTL4 and ANGPTL8- are important regulators of plasma lipoproteins. They inhibit the enzyme lipoprotein lipase, which plays a key role in the intravascular lipolysis of triglycerides present in some lipoprotein classes. This review focuses on the role of ANGPTL3 as emerged from the study of genetic variants of Angptl3 gene in mice and humans. Both loss of function genetic variants and inactivation of Angptl3 gene in mice are associated with a marked reduction of plasma levels of triglyceride and cholesterol and an increased activity of lipoprotein lipase and endothelial lipase...
April 12, 2018: Journal of Biomedical Research
https://www.readbyqxmd.com/read/29747316/-abnormal-expression-of-angiopoietin-2-associated-with-invasion-metastasis-and-prognosis-of-lung-cancer
#15
L W Qiu, J R Chen, X L Yang, M Fang, W J Zheng, Z Z Dong, M Yao, D F Yao
Objective: To investigate the relationship between abnormal angiopoietin-2 (Ang-2) expression and invasion/metastasis of lung cancer. Methods: Totally 122 cases of postoperative primary lung cancer tissues and their paracancerous tissues from Jan. 2009 to Dec. 2010 were collected from Affiliated Hospital of Nantong University and Ang-2 expression was analyzed by immunohistochemistry. At the cellular level, the protein and mRNA levels of Ang-2 in lung epithelial cell line Beas-2B and four lung cancer cell lines (SPCA-1, NCI-1650, A549 and NCI-H1975) were observed...
April 24, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29746655/downregulated-angiopoietin-like-peptide-8-production-at-calving-related-to-changes-in-lipid-metabolism-in-dairy-cows
#16
Misato Nakano, Yutaka Suzuki, Satoshi Haga, Eri Yamauchi, Dahye Kim, Koki Nishihara, K Nakajima, Takafumi Gotoh, Seungju Park, Myunggi Baik, Kazuo Katoh, Sanggun Roh
Acute physiological adaptation of lipid metabolism during the postpartum transition period of cows facilitates peripheral metabolic regulation. Hepatokines, which are hormones secreted from hepatocytes, are presumed to play a critical role in systemic metabolic regulation. Angiopoietin-like protein 8 (ANGPTL8) has been identified as a novel hepatokine associated with circulating triglyceride concentrations in mice and humans. However, regulation of ANGPTL8 and its physiological effects are still unknown in cattle...
May 9, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29740443/endothelial-activation-the-ang-tie-axis-in-sepsis
#17
REVIEW
Aleksandra Leligdowicz, Melissa Richard-Greenblatt, Julie Wright, Valerie M Crowley, Kevin C Kain
Sepsis, a dysregulated host response to infection that causes life-threatening organ dysfunction, is a highly heterogeneous syndrome with no specific treatment. Although sepsis can be caused by a wide variety of pathogenic organisms, endothelial dysfunction leading to vascular leak is a common mechanism of injury that contributes to the morbidity and mortality associated with the syndrome. Perturbations to the angiopoietin (Ang)/Tie2 axis cause endothelial cell activation and contribute to the pathogenesis of sepsis...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29739862/novel-gpihbp1-independent-pathway-for-clearance-of-plasma-tgs-in-angptl4-gpihbp1-mice
#18
Emily M Cushing, Kelli L Sylvers, Xun Chi, Shwetha K Shetty, Brandon Sj Davies
Mice lacking glycosylphosphatidylinositol-anchored high-density lipoprotein binding protein 1 (GPIHBP1) are unable to traffic LPL to the vascular lumen. Thus, TG clearance is severely blunted, and mice are extremely hypertriglyceridemic. Paradoxically, mice lacking both GPIHBP1 and the LPL regulator angiopoietin-like 4 (ANGPTL4) are far less hypertriglyceridemic. We sought to determine the mechanism by which Angptl4 -/- Gpihbp1 -/- double knockout mice clear plasma triglycerides. We confirmed that, on a normal chow diet, plasma TG levels were lower in Angptl4 -/- Gpihbp1 -/- mice than in Gpihbp1 -/- mice; however, the difference disappeared with administration of a high-fat diet...
May 8, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29739381/angiopoietin-like-4-promotes-osteosarcoma-cell-proliferation-and-migration-and-stimulates-osteoclastogenesis
#19
T Zhang, A Kastrenopoulou, Q Larrouture, N A Athanasou, H J Knowles
BACKGROUND: Osteosarcoma is the most common primary bone cancer in children and young adults. It is highly aggressive and patients that present with metastasis have a poor prognosis. Angiopoietin-like 4 (ANGPTL4) drives the progression and metastasis of many solid tumours, but has not been described in osteosarcoma tissue. ANGPTL4 also enhances osteoclast activity, which is required for osteosarcoma growth in bone. We therefore investigated the expression and function of ANGPTL4 in human osteosarcoma tissue and cell lines...
May 8, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29737632/mesenchymal-stem-cell-microvesicles-restore-protein-permeability-across-primary-cultures-of-injured-human-lung-microvascular-endothelial-cells
#20
Shuling Hu, Jeonghyun Park, Airan Liu, JaeHoon Lee, Xiwen Zhang, Qi Hao, Jae-Woo Lee
Our previous study demonstrated that mesenchymal stem cell (MSC) microvesicles (MV) reduced lung inflammation, protein permeability, and pulmonary edema in endotoxin-induced acute lung injury in mice. However, the underlying mechanisms for restoring lung protein permeability were not fully understood. In this current study, we hypothesized that MSC MV would restore protein permeability across injured human lung microvascular endothelial cells (HLMVEC) in part through the transfer of angiopoietin-1 (Ang1) mRNA to the injured endothelium...
May 8, 2018: Stem Cells Translational Medicine
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