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Vascular Remodeling

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https://www.readbyqxmd.com/read/27932351/telomerase-reverse-transcriptase-deficiency-prevents-neointima-formation-through-chromatin-silencing-of-e2f1-target-genes
#1
Elizabeth B Endorf, Hua Qing, Jun Aono, Naoto Terami, Geneviève Doyon, Eric Hyzny, Karrie L Jones, Hannes M Findeisen, Dennis Bruemmer
OBJECTIVE: Aberrant proliferation of smooth muscle cells (SMC) in response to injury induces pathological vascular remodeling during atherosclerosis and neointima formation. Telomerase is rate limiting for tissue renewal and cell replication; however, the physiological role of telomerase in vascular diseases remains to be determined. The goal of the present study was to determine whether telomerase reverse transcriptase (TERT) affects proliferative vascular remodeling and to define the molecular mechanism by which TERT supports SMC proliferation...
December 8, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27931776/cd47-deficiency-improves-neurological-outcomes-of-traumatic-brain-injury-in-mice
#2
Song Zhao, Zhanyang Yu, Yu Liu, Yang Bai, Yinghua Jiang, Klaus van Leyen, Yong-Guang Yang, Josephine M Lok, Michael J Whalen, Eng H Lo, Xiaoying Wang
CD47 is a receptor for signal-regulatory protein alpha (SIRPα) in self-recognition by the innate immune system, and a receptor of thrombospondin-1 (TSP-1) contributing to vascular impairment in response to stress. However, the roles of CD47 in traumatic brain injury (TBI) have not been investigated. In this study we aimed to test our hypothesis that CD47 mediates early neutrophil brain infiltration and late brain vascular remodeling after TBI. Mice were subjected to TBI using a controlled cortical impact (CCI) device...
December 5, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27931610/biological-phenotyping-of-combined-post-capillary-and-pre-capillary-pulmonary-hypertension-focus-on-pulmonary-vascular-remodeling
#3
EDITORIAL
Jane A Leopold
No abstract text is available yet for this article.
December 13, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27931514/vascular-alterations-in-a-murine-model-of-acute-graft-versus-host-disease-are-associated-with-decreased-serum-levels-of-adiponectin-and-an-increased-activity-and-vascular-expression-of-indoleamine-2-3-dioxygenase
#4
Peter M Schmid, Abdellatif Bouazzaoui, Karin Schmid, Christoph M Birner, Christian Schach, Lars S Maier, Ernst Holler, Dierk H Endemann
Graft-versus-host disease (GVHD) is the limiting complication after bone marrow transplantation (BMT), and its pathophysiology seems to be highly influenced by vascular factors. Our study aimed at elucidating possible mechanisms involved in vascular GVHD. For this purpose, we used a fully MHC-mismatched model of BALB/c mice conditioned according to two different intensity protocols with total body irradiation and transplantation of allogeneic (C57BL/6) or syngeneic bone marrow cells and splenocytes. Mesenteric resistance arteries were studied in a pressurized myograph...
November 2016: Cell Transplantation
https://www.readbyqxmd.com/read/27927914/tryptophan-hydroxylase-1-tph1-inhibition-impacts-pulmonary-vascular-remodeling-in-two-rat-models-of-pulmonary-hypertension
#5
Robert J Aiello, Patricia-Ann Bourassa, Qing Zhang, Jeffrey Dubins, Daniel R Goldberg, Stephane De Lombaert, Marc Humbert, Christophe Guignabert, Maria A Cavasin, Timothy A McKinsey, Vishwas Paralkar
Pulmonary arterial hypertension (PAH) is a progressive disease defined by a chronic elevation in pulmonary arterial pressure with extensive pulmonary vascular remodeling and perivascular inflammation characterized by an accumulation of macrophages, lymphocytes, dendritic cells and mast cells. While the exact etiology of the disease is unknown, clinical as well as pre-clinical data strongly implicate a role for serotonin (5 HT) in the process. Here, we investigated the chronic effects of pharmacological inhibition of tryptophan hydroxylase 1 (TPH1), the rate-limiting enzyme in peripheral 5 HT biosynthesis, in two pre-clinical models of pulmonary hypertension (PH), the monocrotaline (MCT) rat and the SU5416 (SUGEN)-hypoxia rat...
December 7, 2016: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/27927704/nogo-a-regulates-vascular-network-architecture-in-the-postnatal-brain
#6
Thomas Wälchli, Alexandra Ulmann-Schuler, Christoph Hintermüller, Eric Meyer, Marco Stampanoni, Peter Carmeliet, Maximilian Y Emmert, Oliver Bozinov, Luca Regli, Martin E Schwab, Johannes Vogel, Simon P Hoerstrup
Recently, we discovered a new role for the well-known axonal growth inhibitory molecule Nogo-A as a negative regulator of angiogenesis in the developing central nervous system. However, how Nogo-A affected the three-dimensional (3D) central nervous system (CNS) vascular network architecture remained unknown. Here, using vascular corrosion casting, hierarchical, synchrotron radiation μCT-based network imaging and computer-aided network analysis, we found that genetic ablation of Nogo-A significantly increased the three-dimensional vascular volume fraction in the postnatal day 10 (P10) mouse brain...
November 10, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27927648/renin-angiotensin-system-transgenic-mouse-model-recapitulates-pathophysiology-similar-to-human-preeclampsia-with-renal-injury-that-may-be-mediated-through-vegf
#7
J Morgan Denney, Cynthia E Bird, Annette Gendron-Fitzpatrick, Emmanuel Sampene, Ian M Bird, Dinesh M Shah
Using a transgenic cross, we evaluated features of preeclampsia, renal injury and the sFlt1/VEGF changes. Transgenic hAGT and hREN, or wild type (WT) C57Bl/6 mice were cross-bred: ♀hAGT x ♂hREN for preeclampsia (PRE) model and ♀WT x ♂WT for pregnant controls (WTP). Samples were collected for plasma VEGF, sFlt1 and urine albumin. Blood pressures (BP) were monitored by telemetry. Vascular reactivity was investigated by wire myography. Kidneys and placenta were immunostained for sFlt1 and VEGF. Eleven PRE and 9 WTP mice were compared...
December 7, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27926989/targeting-gm-csf-in-epithelial-and-vascular-remodeling-in-experimental-eosinophilic-esophagitis
#8
Eóin N McNamee, Kathryn A Biette, Juliet Hammer, Rachel Harris, Heather Miyazawa, James J Lee, Glenn T Furuta, Joanne C Masterson
BACKGROUND: Eosinophilic esophagitis (EoE) is a chronic antigen-mediated clinicopathologic disease of the esophagus characterized by an eosinophil-predominant inflammatory infiltrate. A clinical hallmark is extensive tissue remodeling including basal zone hyperplasia, fibrosis and angiogenesis. However, the cellular mechanisms responsible for these processes are not fully defined. We hypothesized that targeting GM-CSF (an agonist cytokine linked with eosinophil survival and activation) would be protective in a pre-clinical model of EoE...
December 7, 2016: Allergy
https://www.readbyqxmd.com/read/27925201/vascular-inter-regulation-of-inflammation-molecular-and-cellular-targets-for-cns-therapy
#9
REVIEW
Marta Machado-Pereira, Tiago Santos, Liliana Bernardino, Raquel Ferreira
Angiogenesis and inflammation are clearly interconnected and interdependent processes that are dysregulated in a series of systemic and brain pathologies. Herein, key aspects regarding endothelial cell function and tissue remodelling that are particularly affected or aggravated by inflammation are presented. Most importantly, the cellular and molecular mechanisms involved in the vascular regulation of the inflammatory processes occurring in several brain disorders and how they impact on disease/injury progression are detailed, highlighting potential targets for therapy...
December 7, 2016: Journal of Neurochemistry
https://www.readbyqxmd.com/read/27924393/autologous-augmentation-of-hiatal-hernia-repair-with-filtered-platelet-concentrate-improves-tissue-remodeling-in-a-swine-model
#10
Maria S Altieri, Gabriel Pagnotti, Angelique Corthals, Kenneth Shroyer, Aurora D Pryor, Mark Talamini, Dana A Telem
INTRODUCTION: Autologus augmentation of wound remodeling with platelet concentrate is a burgeoning field with promising results. We hypothesized that the addition of filtered platelet concentrate (fPC) to an acellular biologic graft would improve crural healing and tissue integrity in hiatal hernia repair. METHODS: Sixteen healthy Yorkshire female pigs were divided into three groups: hiatus repair (HR) (n = 7), HR with biologic graft (HRM; n = 8, and HR with biologic graft and fPC (fPC; n = 9)...
December 6, 2016: Surgical Endoscopy
https://www.readbyqxmd.com/read/27923978/smooth-muscle-cell-specific-tgfbr1-deficiency-attenuates-neointimal-hyperplasia-but-promotes-an-undesired-vascular-phenotype-for-injured-arteries
#11
Mingmei Liao, Pu Yang, Fen Wang, Scott A Berceli, Yasmin H Ali, Kelvin L Chan, Zhihua Jiang
Neointimal hyperplasia (NIH) and inward wall remodeling cause arterial restenosis and failure of bypass vein grafts. Previous studies from our group suggest that transforming growth factor (TGF) β promotes these pathologies via regulating cell kinetics at the early stage and matrix metabolism at the late stage. Although these temporal TGFβ effects may result from its signaling in different cell groups, the responsible cell type has not been identified. In the current study, we evaluated the effect of smooth muscle cell (SMC)-specific TGFβ signaling through its type I receptor TGFBR1 on NIH and wall remodeling of the injured femoral arteries (FAs)...
December 2016: Physiological Reports
https://www.readbyqxmd.com/read/27923220/differential-regulation-of-bmal1-clock-and-endothelial-signaling-in-the-aortic-arch-and-ligated-common-carotid-artery
#12
Xia Shang, Paramita Pati, Ciprian B Anea, David J R Fulton, R Daniel Rudic
The circadian clock is rhythmically expressed in blood vessels, but the interaction between the circadian clock and disturbed blood flow remains unclear. We examined the relationships between BMAL1 and CLOCK and 2 regulators of endothelial function, AKT1 and endothelial nitric oxide synthase (eNOS), in vascular regions of altered blood flow. We found that the aortic arch from WT mice exhibited reduced sensitivity to acetylcholine (Ach)-mediated relaxation relative to the thoracic aorta. In Clock-mutant (mut) mice the aorta exhibited a reduced sensitivity to Ach...
December 7, 2016: Journal of Vascular Research
https://www.readbyqxmd.com/read/27921189/homogenized-constrained-mixture-models-for-anisotropic-volumetric-growth-and-remodeling
#13
F A Braeu, A Seitz, R C Aydin, C J Cyron
Constrained mixture models for soft tissue growth and remodeling have attracted increasing attention over the last decade. They can capture the effects of the simultaneous presence of multiple constituents that are continuously deposited and degraded at in general different rates, which is important to understand essential features of living soft tissues that cannot be captured by simple kinematic growth models. Recently the novel concept of homogenized constrained mixture models was introduced. It was shown that these models produce results which are very similar (and in certain limit cases even identical) to the ones of constrained mixture models based on multi-network theory...
December 5, 2016: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/27920207/vascular-angular-remodeling-by-kissing-y-stenting-in-wide-necked-intracranial-bifurcation-aneurysms
#14
Katharina Melber, Dan Meila, Philipp Draheim, Dominik Grieb, Björn Greling, Martin Schlunz-Hendann, Friedhelm Brassel
INTRODUCTION: Single stent deployment leads to a change in vascular geometry in wide necked bifurcation aneurysms. In some complex cases, the use of the single stent technique might not be sufficient or may not be feasible. The kissing-Y stenting technique appears to be an alternative endovascular treatment option. The aim of this study was to evaluate the effects of the kissing-Y stenting technique on vascular angular remodeling. METHODS: 21 patients with wide necked intracranial bifurcation aneurysms at different sites (10 anterior communicating artery, 6 middle cerebral artery, 3 basilar artery, 1 vertebral artery/posterior inferior cerebellar artery, 1 internal carotid artery/posterior communicating artery) were treated with 44 closed cell stents (follow-up 2012-2016) using the kissing-Y stenting technique...
December 5, 2016: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/27919930/mir-17-20-controls-prolyl-hydroxylase-2-phd2-hypoxia-inducible-factor-1-hif1-to-regulate-pulmonary-artery-smooth-muscle-cell-proliferation
#15
Tianji Chen, Qiyuan Zhou, Haiyang Tang, Melike Bozkanat, Jason X-J Yuan, J Usha Raj, Guofei Zhou
BACKGROUND: Previously we found that smooth muscle cell (SMC)-specific knockout of miR-17~92 attenuates hypoxia-induced pulmonary hypertension. However, the mechanism underlying miR-17~92-mediated pulmonary artery SMC (PASMC) proliferation remains unclear. We sought to investigate whether miR-17~92 regulates hypoxia-inducible factor (HIF) activity and PASMC proliferation via prolyl hydroxylases (PHDs). METHODS AND RESULTS: We show that hypoxic sm-17~92(-/-) mice have decreased hematocrit, red blood cell counts, and hemoglobin contents...
December 5, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27917469/association-of-dysfunctional-synapse-defective-1-syde1-with-restricted-fetal-growth-syde1-regulates-placental-cell-migration-and-invasion
#16
Hsiao-Fan Lo, Ching-Yen Tsai, Chie-Pein Chen, Liang-Jie Wang, Yun-Shien Lee, Chia-Yu Chen, Chung-Tiang Liang, Mei-Leng Cheong, Hungwen Chen
The transcription factor glial cells missing 1 (GCM1) regulates trophoblast differentiation and function during placentation. Decreased GCM1 expression is associated with preeclampsia, suggesting that abnormal expression of GCM1 target genes may contribute to the pathogenesis of pregnancy complications. Here we identified a novel GCM1 target gene, synapse defective 1 (SYDE1), which encodes a RhoGAP that is highly expressed in human placenta, and demonstrated that SYDE1 promotes cytoskeletal remodelling and cell migration and invasion...
December 5, 2016: Journal of Pathology
https://www.readbyqxmd.com/read/27914866/co-signaling-molecules-in-maternal-fetal-immunity
#17
REVIEW
Yuan-Yuan Xu, Song-Cun Wang, Da-Jin Li, Mei-Rong Du
Physiologically, a successful pregnancy requires the maternal immune system to recognize and tolerate the semiallogeneic fetus, and allow for normal invasion of trophoblasts. Thus, pregnancy complications are considered to be associated with dysfunctional maternal-fetal crosstalk. Co-signaling molecules are a group of cell surface molecules that positively or negatively modulate the immune response. Well studied in the fields of oncology and transplantation, they are also suggested to be involved in maternal-fetal crosstalk...
November 30, 2016: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/27913195/breast-cancer-derived-extracellular-vesicles-stimulate-myofibroblast-differentiation-and-pro-angiogenic-behavior-of-adipose-stem-cells
#18
REVIEW
Young Hye Song, Christine Warncke, Sung Jin Choi, Siyoung Choi, Aaron E Chiou, Lu Ling, Han-Yuan Liu, Susan Daniel, Marc A Antonyak, Richard A Cerione, Claudia Fischbach
Adipose-derived stem cells (ASCs) are abundantly present in the mammary microenvironment and can promote breast cancer malignancy by differentiating into myofibroblasts. However, it remains largely unclear which role tumor-derived extracellular vesicles (TEVs) play in this process. Here, we used microfabricated, type I collagen-based 3-D tissue culture platforms to investigate the effect of breast cancer cell-derived TEVs on ASCs myofibroblast differentiation and consequential changes in extracellular matrix remodeling and vascular sprouting...
November 29, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27912147/inhibition-of-endocan-attenuates-monocrotaline-induced-connective-tissue-disease-related-pulmonary-arterial-hypertension
#19
Haiyan Zhao, Yunxin Xue, Yun Guo, Yue Sun, Dongmei Liu, Xiaofei Wang
Connective tissue disease related pulmonary arterial hypertension (CTD-PAH) is characterized by vascular remodeling, endothelial dysfunction and inflammation. Endocan is a novel endothelial dysfunction marker. The aim of the present study was to investigate the role of endocan in CTD-PAH. Monocrotaline (MCT)-induced PAH rats were used as the CTD-PAH model. Short hairpin RNA packed in a lentiviral vector used to inhibit endocan expression was intratracheally instilled in rats prior to the MCT injection. Endocan was found to be increased in the serum and lung of MCT-induced PAH rats...
November 29, 2016: International Immunopharmacology
https://www.readbyqxmd.com/read/27911229/c-2-arteriovenous-fistula-presenting-as-a-pathologic-hangman-s-fracture-case-report
#20
Rajeev D Sen, Carolina Gesteira Benjamin, Howard A Riina, Donato Pacione
The authors report on an 81-year-old woman with a pathologic hangman's fracture secondary to a complex arteriovenous fistula (AVF). The patient presented with severe, unremitting neck pain and was found to have fractures bilaterally through the pars interarticularis of C-2 with significant anterior subluxation of C-2 over C-3 along with widening of the left transverse foramen. Due to an abnormally appearing left vertebral artery (VA) on CT angiography, the patient underwent conventional angiography, which revealed a complex AVF stemming from the left VA at the level of C-2 with dilated posterior cervical veins and a large venous varix...
December 2, 2016: Journal of Neurosurgery. Spine
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