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https://www.readbyqxmd.com/read/27913637/mural-endothelial-cell-cell-interactions-stabilize-the-developing-zebrafish-dorsal-aorta
#1
Amber N Stratman, Sofia A Pezoa, Olivia M Farrelly, Daniel Castranova, Louis E Dye, Matthew G Butler, Harwin Sidik, William S Talbot, Brant M Weinstein
Mural cells (vascular smooth muscle cells and pericytes) play a critical role in the development of the vasculature, promoting vascular quiescence and long-term vessel stabilization through their interactions with endothelial cells. However, the mechanistic details of how mural cells stabilize vessels are not fully understood. We have examined the emergence and functional role of mural cells investing the dorsal aorta during early development using the zebrafish. Consistent with previous literature, our data suggest that cells ensheathing the dorsal aorta emerge from a sub-population of cells in the adjacent sclerotome...
December 2, 2016: Development
https://www.readbyqxmd.com/read/27913135/mycophenolate-mofetil-attenuates-uterine-ischaemia-reperfusion-injury-in-a-rat-model
#2
Gulcin Sahin Ersoy, Meryem Kurek Eken, Ozge Cevik, Ozlem T Cilingir, Reshef Tal
This study evaluated the effect of mycophenolate mofetil (MMF) on uterine tissue preservation following ischaemia/reperfusion (I/R) injury. Uterine I/R injury was induced in rats by clamping the lower abdominal aorta and ovarian arteries for 30 min. Group I/R + V (n = 7) received vehicle alone while Group I/R + M (n = 7) received 20 mg/kg/day MMF. Control groups underwent sham surgery and received vehicle (Group C) or 20 mg/kg/day MMF (Group M) (n = 7 for both). Four hours after detorsion, uterine tissue 8-hydroxy-2'-deoxyguanosine (8-OHdG), glutathione, malondialdehyde (MDA), myeloperoxidase (MPO), superoxide dismutase (SOD) and serum ischaemia modified albumin (IMA) concentrations were measured...
November 21, 2016: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/27912212/knockdown-of-inhibitory-guanine-nucleotide-binding-protein-gi%C3%AE-2-by-antisense-oligodeoxynucleotides-attenuates-the-development-of-hypertension-and-tachycardia-in-spontaneously-hypertensive-rats
#3
Yousra Ali El-Basyuni, Yuan Li, Madhu B Anand-Srivastava
BACKGROUND: We previously showed that the levels of both Giα-2 and Giα-3 proteins were augmented in spontaneously hypertensive rats (SHRs) before the onset of hypertension. In addition, intraperitoneal injection of pertussis toxin, which inactivates both Giα proteins, prevented the development of hypertension in SHRs. The aim of the present study was to determine the specific contributions of Giα-2 and Giα-3 proteins to the development of hypertension. METHODS AND RESULTS: Antisense oligodeoxynucleotide of Giα-2 and Giα-3 encapsulated in PEG/DOTAP/DOPE cationic liposomes were administrated intravenously into 3-week-old prehypertensive SHRs and Wistar Kyoto rats, whereas the control Wistar Kyoto rats and SHRs received PBS, empty liposomes, or sense...
October 26, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27912196/nox-isoforms-in-the-development-of-abdominal-aortic-aneurysm
#4
Kin Lung Siu, Qiang Li, Yixuan Zhang, Jun Guo, Ji Youn Youn, Jie Du, Hua Cai
Oxidative stress plays an important role in the formation of abdominal aortic aneurysm (AAA), and we have recently established a causal role of uncoupled eNOS in this severe human disease. We have also shown that activation of NADPH oxidase (NOX) lies upstream of uncoupled eNOS. Therefore, identification of the specific NOX isoforms that are required for eNOS uncoupling and AAA formation would ultimately lead to novel therapies for AAA. In the present study, we used the Ang II infused hph-1 mice to examine the roles of NOX isoforms in the development of AAA...
November 19, 2016: Redox Biology
https://www.readbyqxmd.com/read/27911412/reproducible-arterial-denudation-injury-by-infrarenal-abdominal-aortic-clamping-in-a-murine-model
#5
Aditya S Shirali, Austin I McDonald, Julia J Mack, M Luisa Iruela-Arispe
Percutaneous vascular interventions uniformly result in arterial denudation injuries that subsequently lead to thrombosis and restenosis. These complications can be attributed to impairments in re-endothelialization within the wound margins. Yet, the cellular and molecular mechanisms of re-endothelialization remain to be defined. While several animal models to study re-endothelialization after arterial denudation are available, few are performed in the mouse because of surgical limitations. This undermines the opportunity to exploit transgenic mouse lines and investigate the contribution of specific genes to the process of re-endothelialization...
November 24, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27910802/near-infrared-spectroscopy-evaluated-cerebral-oxygenation-during-anesthesia
#6
Henrik Sørensen
Likely, maintained organ and notably cerebral perfusion, secures rapid recovery following anesthesia. To secure cerebral blood flow (CBF) at least mean arterial pressure (MAP) and the arterial carbon dioxide tension (PaCO2) need to be considered. CBF is "autoregulated", i.e. stays more or less stable within a MAP of 50-150 mmHg, but the lower limit appears to depend on the central blood volume and/or cardiac output, illustrated by a decrease in CBF at a MAP of 80 mmHg with a compromised central blood volume, while CBF remains constant with a MAP < 40 mmHg, if the central blood volume is maintained...
December 2016: Danish Medical Journal
https://www.readbyqxmd.com/read/27910096/de-novo-migraine-with-aura-after-surgical-repair-of-aortic-coarctation
#7
Yuji Kato, Takeshi Hayashi, Toshiki Kobayashi, Ayumu Masuoka, Tetsuya Abe, Takahiro Hasebe, Norio Tanahashi, Masaki Takao
Coarctation of the aorta (CoA) is reported to be associated with an increased risk for migraine. We describe here the case of a 13-year-old female patient who presented migraine with aura after surgical repair of CoA with a stent. As possible reasons for her condition, we postulate host responses to stent placement and/or disturbed cerebral autoregulation related to intracranial hypertension before the surgical repair and hypotension afterward, leading to hypoperfusion. This case demonstrates that de novo migraine with aura can occur after surgical repair of CoA and should be recognized as a potential complication...
December 2, 2016: Headache
https://www.readbyqxmd.com/read/27909282/-coronary-artery-revascularization-with-v-composite-saphenous-veins-graft-in-a-bad-ascending-aorta-report-of-a-case
#8
Makoto Shirakawa, Yosuke Ishii, Yasuhiro Kawase, Shunichiro Sakamoto, Yasuo Miyagi, Tetsuro Morota, Takashi Nitta
A 77-year-old male with many comorbidities underwent off pump coronary artery bypass grafting. A severely atherosclerotic ascending aorta was revealed by preoperative computed tomography(CT) and epiaortic echography during operation. Therefore, V-composite saphenous vein grafting was adopted for non left anterior descending artery (LAD) coronary lesions in addition to left internal thoracic artery-left anterior descending artery bypass grafting. He was discharged with no complications and all grafts were confirmed to be patent by postoperative CT...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27909281/-transaortic-thoracic-endovascular-aortic-repair-via-right-anterior-mini-thoracotomy-report-of-a-case
#9
Keitaro Okamoto, Tomoyuki Wada, Hirofumi Anai, Satoshi Takebayashi, Takashi Shuto, Takayuki Kawashima, Kazuki Mori, Norio Hongo, Noritaka Kamei, Hiromu Mori, Shinji Miyamoto
An 81-year-old man presented with ruptured thoracic aortic aneurysm under stable condition. He had been suffering from chronic obstructive pulmonary disease, chronic renal failure and rheumatoid arthritis. We performed hybrid thoracic endovascular aortic repair via right anterior mini-thoracotomy inserting a device through a conduit on the ascending aorta. The patient was discharged without aorta-related complications.
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27909279/-stanford-type-a-aortic-dissection-after-off-pump-coronary-artery-bypass-grafting-using-automated-proximal-anastomotic-device-report-of-a-case
#10
Toshiyuki Maeda, Taku Sakurada, Satoshi Muraki, Shinji Nakashima, Jun Sasaki, Eiji Araki
Operative mortality of Stanford type A aortic dissection( AAD) repair with previous cardiac surgery is high, especially with previous coronary artery bypass grafting. We report an extremely rare case of AAD related to the PAS-Port system. A 68-year-old male patient on dialysis was admitted to our hospital with a diagnosis of AAD. Half a year before he had undergone off-pump coronary artery bypass grafting using PAS-Port system for a proximal anastomosis of a vein graft. Urgent graft replacement of the ascending aorta was performed, and the proximal anastomotic site of the vein graft was attached to the prosthetic graft...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27909276/-closure-of-ascending-aortic-entry-by-debranching-endovascular-management-in-an-elderly-patient-with-acute-stanford-type-a-dissection
#11
Munehiro Saiki, Keiji Yunoki, Naoya Sakoda, Shigeru Hattori, Gaku Uchino, Takuya Kawabata, Yasufumi Fujita, Kunikazu Hisamochi, Hideo Yoshida
An 85-year-old woman was hospitalized by emergency for an acute Stanford type A aortic dissection. Computed tomography showed a primary entry on the ascending aorta and pericardial effusion. Although her hemodynamics was unstable due to cardiac shock, her family wished no open surgery considering her age and frailty. A couple of days later, her condition became stabilized with antihypertensive therapy. Since the dissection was limited within the ascending aorta, closure of the entry with the stentgraft was considered appropriate and much less invasive as compared with an open surgery...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27909273/-minimally-invasive-coronary-artery-bypass-grafting-using-bilateral-in-situ-internal-thoracic-arteries
#12
Akihiko Yamauchi, Masaki Tabuchi, Shinya Terada, Keita Kikuchi
A 73-year-old male with diabetes mellitius was referred to our hospital for coronary artery bypass grafting (CABG). Preoperative coronary angiography revealed three-vessel coronary disease. Minimally invasive coronary artery grafting (MICS CABG) via left thoracotomy was selected to decrease surgical site infection due to severe diabetes. In situ bilateral internal thoracic arteries (BITA) were harvested using a long type Harmonic scalpel. In situ right internal thorac artery( RITA)-left anterior descending artery (LAD), in situ left internal thorac artery( LITA)-high lateral branch (HL), and aorta-saphenous vein graft (SVG)-#4 posterior descending artery were performed...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27908824/arteriographic-patterns-of-atherosclerosis-and-the-association-between-diabetes-mellitus-and-ethnicity-in-chronic-critical-limb-ischemia
#13
Jayer Chung, J Gregory Modrall, Martyn Knowles, Qun Xiang, Lawrence A Lavery, Carlos H Timaran, R James Valentine
BACKGROUND: Disparate outcomes in critical limb ischemia (CLI) persist between ethnicities. The contribution of modifiable factors versus intrinsic biologic differences remains unclear. Hence, we aimed to quantify the associations between ethnicity and anatomic patterns of arterial occlusive disease in CLI, adjusting for known atherosclerotic risk factors. METHODS: We performed a retrospective, single-center review of consecutive patients presenting to the vascular surgery service with CLI...
November 28, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27908818/ascending-aorta-to-hepatic-and-mesenteric-artery-bypassing-in-patients-with-chronic-mesenteric-ischaemia-and-extensive-aortic-disease-a-case-report-and-review-of-the-literature
#14
James Barr, John Kokotsakis, Pantelis Tsipas, Prodromos Papapavlou, Konstantinos Velissarios, Theodoros Kratimenos, Thanos Athanasiou
Chronic mesenteric ischaemia (CMI) is a rare disorder caused by severe stenosis of the mesenteric arterial supply that results in post prandial pain and weight loss. Treatment options are surgical or endovascular. Surgical bypass can be performed in an antegrade fashion from the supracoeliac abdominal aorta or the distal descending thoracic aorta or in a retrograde fashion from the infra-renal aorta or the common iliac artery. However in some patients with disease of the descending thoracic aorta (DTA) or the abdominal aorta (AA) another site for the proximal anastomosis needs to be found...
November 28, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27908810/emergent-treatment-of-a-ruptured-thoraco-abdominal-aortic-aneurysm-by-off-label-rescue-implantation-of-the-ovation-%C3%A2-stent-graft-in-nonagenarians-patient
#15
Chiara Pranteda, Pasqualino Sirignano, Federica Fornelli, Wassim Mansour, Nunzio Montelione, Laura Capoccia, Francesco Speziale
We report a case of a compassionate treatment of a ruptured thoraco-abdominal aortic aneurysm in a 92-year-old patient. Patient was admitted to our emergency department for acute onset of pain irradiating to the back. Computed tomographic angiography showed the presence of a thoraco-abdominal aortic aneurysm with a contained rupture at infrarenal level. Given of the presence of a relative healthy visceral aorta, we decided to treat the patient by Ovation(®) (Endologix, Irvine, CA - USA) implantation in an off-label fashion...
November 28, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27908809/a-combination-of-thoracic-and-abdominal-grafts-to-treat-an-abdominal-aortic-aneurysm-with-hostile-proximal-neck
#16
Mafalda Massara, Roberto Prunella, Pasquale Gerardi, Giovanni De Caridi, Raffaele Serra, Stefano Notarstefano, Giovanni Impedovo
Endovascular aneurysm repair (EVAR) actually represents the treatment of choice for most patients affected by aneurysm of the abdominal aorta (AAA). However, the feasibility of EVAR depends on anatomical characteristics of abdominal aorta and ilio-femoral axis. We present the case of a 82-years old man affected by severe left hydronephrosis, kidney and ureteral tumor requiring nephrectomy, that presented also a very voluminous AAA with a large diameter (96 mm), presenting also with a large proximal neck (39 mm) and with a severe angulation of the proximal neck (> 60°)...
November 28, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27908804/custom-made-conical-endograft-in-the-treatment-of-saccular-abdominal-aortic-aneurysms-with-tight-and-calcified-distal-neck-thinking-out-of-the-box
#17
Efstratios Georgakarakos, Christos Argyriou, Nikolaos Schoretsanitis, George S Georgiadis
PURPOSE: to describe the use of the combination of a conical custom-made TREO® (TREO CM) stent-graft in the treatment of a saccular abdominal aortic endograft (AAA) with long but tight and calcified distal neck. TECHNIQUE: A 65-year female patient was treated for a saccular 5.2 cm AAA with a 3cm-long but calcified and tight (16mm) distal neck, precluding the safe use of a bifurcated endograft. Since the patient refused an open surgery, a conical TREO CM endograft was manufactured with 20% proximal oversizing, whereas the 3cm caudal sealing segment demonstrated a conical configuration comprised of a 2cm and 1cm nitinol-supported zones of 20% and 10% oversizing, respectively, in order to avoid excessive strain and incomplete expand at the most distal calcified area, leading ultimately to an insidious infolding and consequent type Ib endoleak...
November 28, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27908421/low-magnesium-diet-alters-distribution-of-macroelements-and-trace-elements-in-tissues-and-organs-of-female-rats
#18
Anastasia A Zheltova, Maria V Kharitonova, Igor N Iezhitsa, Eugeny P Serebryansky, Oleg Y Evsyukov, Alexander A Spasov, Anatoly V Skalny
The aim of the present study was to assess whether dietary magnesium deficiency can alter distribution of macroelements and trace elements in different organs and tissues. Experiments were carried out on 12 adult female Wistar rats, which were fed either a diet with low Mg content (≤20mgkg(-1) of diet) (LMgD) or a diet with daily recommended Mg content (≈500mgkg(-1)) as control group (CG) for 70 days. On the 70th day of the experiment heart, aorta, femoral skeletal muscle, forebrain, cerebellum, pituitary gland, thyroid gland, ovaries, uterus, liver, kidneys, and spleen were taken for analysis of mineral content...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27907038/equol-attenuates-atherosclerosis-in-apolipoprotein-e-deficient-mice-by-inhibiting-endoplasmic-reticulum-stress-via-activation-of-nrf2-in-endothelial-cells
#19
Ting Zhang, Qin Hu, Linying Shi, Li Qin, Qianyong Zhang, Mantian Mi
The development of atherosclerosis is closely related to excessive endoplasmic reticulum stress (ERs). Equol reportedly protects against cardiovascular disease; however, the underlying mechanism for this protection remains unknown. Herein, the mechanisms contributing to the atheroprotective effect of equol were addressed using apolipoprotein E knockout (apoE-/-) mice fed a high-fat diet (HFD) with or without equol. Equol intervention reduced atherosclerotic lesions in the aorta in HFD-fed apoE-/- mice. Plasma lipid analysis showed that equol intervention reduced triglycerides, total cholesterol and LDL-cholesterol and increased HDL-cholesterol...
2016: PloS One
https://www.readbyqxmd.com/read/27906619/effects-of-4-pyridone-3-carboxamide-1%C3%AE-d-ribonucleoside-on-adenine-nucleotide-catabolism-in-the-aortic-wall-implications-for-atherosclerosis-in-apoe-ldlr-mice
#20
Magdalena Zabielska, Barbara Kutryb-Zajac, Paulina Żukowska, Ewa Slominska, Ryszard Smoleński
: 4-Pyridone-3-carboxamide-1-beta-D-ribonucleoside (4PYR) is an endogenously produced nucleoside that had been identified as a substrate for intracellular phosphorylation to form intracellular nucleotides. Previous studies demonstrated that 4PYR adversely affects metabolism of endothelial cells that is known risk factor for atherosclerosis. The purpose of this study was to evaluate effects of 4PYR on the progression of atherosclerosis and changes in extracellular nucleotides degradation on the surface of the vessel wall in the murine model...
December 2016: Nucleosides, Nucleotides & Nucleic Acids
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