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Vascular injury

Yang Li, Jian Li, Zhiwen Hou, Yang Yu, Bo Yu
The primary physiological function of Krüppel-like zinc-finger transcription factor (KLF5) is the regulation of cardiovascular remodeling. Vascular remodeling is closely related to the amelioration of various ischemic diseases. However, the underlying correlation of KLF5 and ischemia is not clear. In this study, we aim to investigate the role of KLF5 in myocardial ischemia reperfusion (IR) injury and the potential mechanisms involved. Cultured H9C2 cells were subjected to oxygen-glucose deprivation/reperfusion (OGD/Rep) to mimic myocardial IR injury in vivo...
October 17, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Arnoldo Santos, Luca Lucchetta, M Ignacio Monge-Garcia, Joao Batista Borges, Gerardo Tusman, Goran Hedenstierna, Anders Larsson, Fernando Suarez-Sipmann
OBJECTIVE: To test whether positive end-expiratory pressure consistent with an open lung approach improves pulmonary vascular mechanics compared with higher or lower positive end-expiratory pressures in experimental acute respiratory distress syndrome. DESIGN: Experimental study. SETTING: Animal research laboratory. SUBJECTS: Ten pigs, 35 ± 5.2 kg. INTERVENTIONS: Acute respiratory distress syndrome was induced combining saline lung lavages with injurious mechanical ventilation...
October 19, 2016: Critical Care Medicine
Gregory A Magee, Jayun Cho, Elizabeth Benjamin, Kazuhide Matsushima, Aaron Strumwasser, Kenji Inaba, Omid Jazaeri, Charles Fox, Demetrios Demetriades
No abstract text is available yet for this article.
August 2016: Journal of Vascular Surgery
Michael J Osgood, Kevin Sexton, Igor Voskresensky, Kyle Hocking, Jun Song, Padmini Komalavilas, Colleen Brophy, Joyce Cheung-Flynn
BACKGROUND: Intimal hyperplasia remains the primary cause of vein graft failure for the 1 million yearly bypass procedures performed using human saphenous vein (HSV) grafts. This response to injury is caused in part by the harvest and preparation of the conduit. The use of Brilliant Blue FCF (FCF) restores injury-induced loss of function in vascular tissues possibly via inhibition of purinergic receptor signaling. This study investigated whether pretreatment of the vein graft with FCF prevents intimal hyperplasia...
August 2016: Journal of Vascular Surgery
J C Menon, J K Joseph, M P Jose, B L Dhananjaya, O V Oommen
INTRODUCTION: Snakebite is an occupational hazard causing considerable morbidity and mortality worldwide, particularly so in tropical countries like India. OBJECTIVE: The aim of this study is to (i) review the demographic, clinical and laboratory findings in patients (1051) admitted with venomous snakebite (ii) to correlate mortality, morbidity and duration of hospital stay with clinical signs, symptoms and laboratory parameters. METHODS: A retrospective study of 1051 patients treated for snakebite over 10 years (2000 - 2009) in Little Flower Hospital, Angamaly, Kerala...
August 2016: Journal of the Association of Physicians of India
Ryoko Uesato, Satoshi Toh, Yoshimitsu Hayashi, Keiichiro Maniwa, Yasuyuki Ishibashi
In scaphoid fractures, delayed diagnosis and nonunion are fairly common as a result of several factors, including the difficulty of radiographic diagnosis of non-displaced fractures and underestimation of the injury by the patient. Main factors to consider when deciding treatment are the type of fracture and fracture stability. In the stable nonunion (Type D1 according to the Filan and Herbert classification, or linear type of Ikeda's classification), percutaneous screw fixation without bone graft is recommended...
October 19, 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Hsing-Hua Tsai, Chin-Pu Lin, Yi-Hui Lin, Chih-Chin Hsu, Jong-Shyan Wang
PURPOSE: Exercise training improves endothelium-dependent vasodilation, whereas hypoxic stress causes vascular endothelial dysfunction. Monocyte-derived endothelial progenitor cells (Mon-EPCs) contribute to vascular repair process by differentiating into endothelial cells. This study investigates how high-intensity interval (HIT) and moderate-intensity continuous (MCT) exercise training affect circulating Mon-EPC levels and EPC functionality under hypoxic condition. METHODS: Sixty healthy sedentary males were randomized to engage in either HIT (3-min intervals at 40 and 80 % VO2max for five repetitions, n = 20) or MCT (sustained 60 % VO2max, n = 20) for 30 min/day, 5 days/week for 6 weeks, or to a control group (CTL) that did not received exercise intervention (n = 20)...
October 19, 2016: European Journal of Applied Physiology
James C Campbell, Alexander Tischer, Venkata Machha, Laurie Moon-Tasson, Banumathi Sankaran, Choel Kim, Matthew Auton
von Willebrand factor׳s (VWF) primary hemostatic responsibility is to deposit platelets at sites of vascular injury to prevent bleeding. This function is mediated by the interaction between the VWF A1 domain and the constitutively active platelet receptor, GPIbα. The crystal structure of the A1 domain harboring the von Willebrand disease (vWD) type 2M mutation p.Gly1324Ser has been recently published in the Journal of Biological Chemistry describing its effect on the function and structural stability of the A1 domain of VWF, "Mutational constraints on local unfolding inhibit the rheological adaptation of von Willebrand factor" [1]...
June 2016: Data in Brief
Avadhesh Kumar, Shalini Kaushal, Neelu Verma, Deepti Chandra
The treatment of gingival recession defects is indicated for esthetic and functional reasons to reduce root sensitivity, to remove muscle pull, to create or augment keratinized tissue, and to prevent disease progression. The presence of sufficient amount of periosteum adjacent to gingival recession defects makes it a suitable graft. The adult human periosteum is a highly vascular connective tissue with immense regenerative potential. It contains fibroblasts, osteogenic progenitor cells, and stem cells as a result of which it has the ability to differentiate into fibroblast, osteoblast, chondrocytes, adipocytes, and skeletal myocytes...
September 2016: Journal of Oral Biology and Craniofacial Research
Esther Peters, Bülent Ergin, Asli Kandil, Ebru Gurel-Gurevin, Andrea van Elsas, Rosalinde Masereeuw, Peter Pickkers, Can Ince
Two small clinical trials indicated that administration of bovine intestinal alkaline phosphatase (AP) improves renal function in critically ill patients with sepsis-associated acute kidney injury (AKI), for which the mechanism of action is not completely understood. Here, we investigated the effects of a newly developed human recombinant AP (recAP) on renal oxygenation and hemodynamics and prevention of kidney damage and inflammation in two in vivo AKI models. To induce AKI, male Wistar rats (n=18) were subjected to renal ischemia (30min) and reperfusion (I/R), or sham-operated...
October 16, 2016: Toxicology and Applied Pharmacology
Sharon L I Wong, Maria B Sukkar
Secreted protein acidic and rich in cysteine (SPARC) is a matricellular protein which regulates interactions between cells and their surrounding extracellular matrix (ECM), and thus governs fundamental cellular functions such as cell adhesion, proliferation and differentiation. SPARC also regulates the expression and activity of numerous growth factors and matrix metalloproteinases essential for ECM degradation and turnover. Studies in SPARC-null mice have revealed a critical role for SPARC in tissue development, injury and repair, and in the regulation of the immune response...
October 19, 2016: British Journal of Pharmacology
Robert N Goldstone, Michael C McCormack, Rachel L Goldstein, Srivalleesha Mallidi, Mark A Randolph, Michael T Watkins, Robert W Redmond, William G Austen
OBJECTIVE: We hypothesized that decreasing vein compliance would protect the vein against stretch injury and reduce intimal hyperplasia (IH). BACKGROUND: Although arteriovenous fistulas (AVFs) are the criterion standard for vascular access, their effectiveness is limited by poor patency with 40% to 60% failing due to IH. Venous stretch injury from exposure to arterial pressure induces IH. Photochemical tissue passivation (PTP) crosslinks adventitial collagen, decreasing vein compliance to resemble that of an artery...
October 17, 2016: Annals of Surgery
Homero Rivas, Ignacio Robles, Francisco Riquelme, Marcelo Vivanco, Julio Jiménez, Boris Marinkovic, Mario Uribe
OBJECTIVE: To evaluate a new magnetic surgical system during reduced-port laparoscopic cholecystectomy in a prospective, multicenter clinical trial. BACKGROUND: Laparoscopic instrumentation coupled by magnetic fields may enhance surgeon performance by allowing for shaft-less retraction and mobilization. The movements can be performed under direct visualization, generating different angles of traction and reducing the number of trocars to perform the procedure. This may reduce well-known associated complications of trocars, including incisional pain, scarring, infection, bowel, and vascular injuries, among others...
October 17, 2016: Annals of Surgery
Umit Kervan, Sinan Sabit Kocabeyoglu, Dogan Emre Sert, Emre Aygün, Kemal Kavasoglu, Mehmet Karahan, Ertekin Utku Unal, Mustafa Pac
OBJECTIVES: The common femoral artery is the standard site for immediate vascular access when initiating adult venoarterial extracorporeal membrane oxygenation. However, this approach is fraught with problems such as femoral artery occlusion, distal limb ischemia, reperfusion injury resulting in compartment syndrome, retroperitoneal hemorrhage, thrombosis, embolization, and most importantly, pulmonary edema. Here, we show our preference of using the subclavian artery with a side graft as a different cannulation technique for outflow of extracorporeal membrane oxygenation, which can avoid complications associated with different access techniques...
October 14, 2016: Experimental and Clinical Transplantation
Jill Moser, Joris van Ark, Marcory C van Dijk, Dale L Greiner, Leonard D Shultz, Harry van Goor, Jan-Luuk Hillebrands
Percutaneous coronary intervention is widely adopted to treat patients with coronary artery disease. However, restenosis remains an unsolved clinical problem after vascular interventions. The role of the systemic and local immune response in the development of restenosis is not fully understood. Hence, the aim of the current study was to investigate the role of the human immune system on subsequent neointima formation elicited by vascular injury in a humanized mouse model. Immunodeficient NOD.Cg-Prkdc(scid)IL2rg(tm1Wjl)(NSG) mice were reconstituted with human (h)PBMCs immediately after both carotid wire and femoral cuff injury were induced in order to identify how differences in the severity of injury influenced endothelial regeneration, neointima formation, and homing of human inflammatory and progenitor cells...
October 19, 2016: Scientific Reports
Gorazd Drevenšek, Mojca Lunder, Eva Tavčar Benković, Borut Štrukelj, Samo Kreft
BACKGROUND: Silver fir trunk extract (SFTE) is a complex mixture of antioxidative polyphenols (lignans and phenolic acids) from the trunks of silver fir trees (Abies alba, lignum). In our previous study, we have shown that SFTE exerts strong antioxidative and protective effects against atherogenic, diet-induced arterial wall damage. OBJECTIVE: The aim of the present study was to test the potential protective effects of SFTE and its compounds, two phenolic acids (p-coumaric and protocatechuic acids) in ischemia-reperfusion injury of isolated rat hearts...
2016: Food & Nutrition Research
Yue Chen, Suhua Jiang, Jianzhou Zou, Yihong Zhong, Xiaoqiang Ding
The kidney is particularly susceptible to ischemia/hypoxia insult while dysfunction of proximal tubular epithelial cells (PTEC) is a primary pathologic hallmark in acute kidney injury. Hypoxia-inducible factor-1 (HIF-1) is a key regulator responsible for cellular hypoxic responses. Therefore, we investigated the effects of HIF-1 suppression, using small interference RNA (siRNA), upon the cell fate of PTEC under hypoxia, and explored the underlying possible molecular mechanism. Hypoxia was induced with hypoxia mimetic cobalt chloride...
October 19, 2016: Renal Failure
Khalil Bdeir, Kandace Gollomp, Marta Stasiak, Junjie Mei, Izabela Papiewska-Pajak, Guohua Zhao, G Scott Worthen, Douglas B Cines, Mortimer Poncz, M Anna Kowalska
RATIONALE: Platelets and neutrophils contribute to the development of acute lung injury (ALI). However, the mechanism by which platelets make this contribution is incompletely understood. We asked whether the two most abundant platelet chemokines, CXCL7, which induces neutrophil chemotaxis and activation, and CXCL4, which does neither, mediate ALI through complementary pathogenic pathways. OBJECTIVES: To examine the role of platelet-derived chemokines in the pathogenesis of ALI using Cxcl7-/- and Cxcl4-/- knockout mice and mice that express human CXCL7 or CXCL4...
October 18, 2016: American Journal of Respiratory Cell and Molecular Biology
Fang Zhang, WenMing Hong, Yan Guo, QianYing Guo, XiaoPeng Hu
BACKGROUND: Microsurgery is a common treatment of brainstem tumors. However, misdirection, vascular damage, nerves injuries, paralysis, even death are all well-known complications, and the risk of adverse events is more likely in less experienced operators. This study was aimed to validate the accuracy of multimodal neuronavigation during microsurgery resection of brainstem tumors. METHODS: Ten patients with brainstem tumors underwent preoperative MRI, diffusion tensor imaging, computed tomography, three-dimensional print, and images loaded into the neuronavigation platform were used for its segmentation and preoperative planning...
October 14, 2016: Journal of Craniofacial Surgery
Andrew C T Ha, Harindra C Wijeysundera, David H Birnie, Atul Verma
PURPOSE OF REVIEW: Catheter-based ablation for atrial fibrillation is a useful and effective form of rhythm-control therapy for symptomatic patients. This article reviews the 'real-world' experience on the outcomes, complications, and costs of atrial fibrillation ablation. RECENT FINDINGS: Currently, real-world outcomes of atrial fibrillation ablation are derived from retrospective analysis of administrative databases or prospective registries from selected centers and patients...
October 15, 2016: Current Opinion in Cardiology
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