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https://www.readbyqxmd.com/read/28648037/-effects-of-activating-silent-information-regulator-1-on-early-kidney-damage-in-rats-with-severe-burn
#1
X Z Bai, T He, Y Liu, W Zhang, F Han, C Yang, W X Cai, Y H Jia, J H Shi, J T Han, L L Su, D H Hu
Objective: To investigate the effects of activating silent information regulator 1 (SIRT1) on the early kidney damage in rats with severe burn. Methods: Thirty healthy male SD rats were divided into sham injury group (SI), pure burn group (PB), and SIRT1 activator group (SA) according to the random number table, with 10 rats in each group. Rats in groups PB and SA were inflicted with 30% total body surface area full-thickness scald (hereinafter referred to as burn) on the back. Immediately after injury, rats in group PB were intraperitoneally injected with normal saline in the dosage of 50 mL/kg, and those in group SA with 1 mg/mL (final mass concentration) resveratrol in the dosage of 50 mL/kg...
June 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28648030/-effect-and-mechanism-of-intermittent-alkaline-stimulation-on-high-phosphorus-induced-calcification-in-vascular-smooth-muscle-cells-of-rats
#2
Y L Bai, J S Xu, T Tian, J X Zhang, L W Cui, H R Zhang, S L Zhang
Objective: To explore the effect and possible mechanisms of intermittent alkaline on rat vascular smooth muscle cells (VSMCs) calcification induced by high phosphorus. Methods: VSMCs were isolated from rat thoracic aorta and cultured in vitro. The fourth generation VSMCs were randomly divided into control group, high phosphorus+ pH7.4, high phosphorus+ pH7.5, high phosphorus+ pH7.6 and high phosphorus+ pH7.7 group with random number table. The control group was cultured in DMEM with 10% fetal bovine serum. Other groups were cultured in DMEM with 10 mmol/L β-glycerophosphate and alkalized by 7...
June 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28648025/-comparison-of-aortic-valve-dysfunction-and-ascending-aorta-dimension-between-patients-with-different-bicuspid-aortic-valve-morphology
#3
X S Ren, Y T Yu, K Liu, Z H Hou, Y Gao, W H Yin, B Lyu
Objective: To compare the characteristics of aortic valve dysfunction and ascending aorta dimension in patients with different bicuspid aortic valve (BAV) morphology. Methods: A total of 197 patients who underwent aortic valve replacement between April 2014 and March 2015 and were diagnosed with BAV by pathology were included, and their clinical data were retrospectively analyzed. Patients were divided into raphe(+) group(109 cases) and raphe(-) group(88 cases) according to the presence or absence of raphe, and L-R group(fusion of left and right cusp, 125 cases) and L/R-N group(fusion of left or right and noncoronary cusp, 72 cases) according to fusion type of the cusps...
June 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28647662/microsurgical-bypass-training-rat-model-part-1-technical-nuances-of-exposure-of-the-aorta-and-iliac-arteries
#4
Ali Tayebi Meybodi, Michael T Lawton, Pooneh Mokhtari, Sonia Yousef, Sirin Gandhi, Arnau Benet
BACKGROUND AND OBJECTIVE: Animal models using rodents are frequently used for the purpose of practicing microvascular anastomosis - an essential technique in cerebrovascular surgery. However, safely and efficiently exposing rat's target vessels is technically difficult. Such difficulty may lead to excessive hemorrhage and shorten animal survival. This limits the ability to perform multiple anastomoses on a single animal and may increase the overall training time and costs. We report our model for microsurgical bypass training in rodents in two consecutive articles...
June 21, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28647503/exogenous-glucagon-like-peptide-1-reduces-body-weight-and-cholecystokinin-8-enhances-this-reduction-in-diet-induced-obese-male-rats
#5
Thaer R Mhalhal, Martha C Washington, Kayla Newman, John C Heath, Ayman I Sayegh
The sites of action regulating meal size (MS) and intermeal interval (IMI) length by glucagon like peptide-1 (7-36) (GLP-1 (7-36)) and cholecystokinin-8 (CCK-8) reside in the areas supplied by the two major branches of the abdominal aorta, celiac and cranial mesenteric arteries. We hypothesized that infusing GLP-1 near those sites reduces body weight (BW) and adding CCK-8 to this infusion enhances the reduction. Here, we measured BW in diet-induced obese (DIO) male rats maintained and tested on normal rat chow and infused with saline, GLP-1 (0...
June 21, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28647198/trends-in-open-abdominal-exposure-among-vascular-surgery-trainees
#6
Victoria Greenwood, Brian Shames, Adam Tanious, Murray L Shames, Jeffrey E Indes
BACKGROUND: This retrospective study evaluates the trends in open abdominal surgery cases among integrated vascular surgery residents compared with their 5 + 2 counterparts. METHODS: The Accreditation Council for Graduate Medical Education (ACGME) case logs between 2007 and 2016 were collected from a pool of 9861 residents and fellows from 371 institutions. Trainees were grouped into three categories: general surgery residency (GSR), integrated vascular surgery residency (IVSR), and vascular surgery fellowship in the United States...
June 21, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28646501/progressive-aortic-root-dilatation-in-pediatric-heart-transplant-recipients
#7
Shagun Sachdeva, Liyun Zhang, Pippa Simpson, Peter C Frommelt
BACKGROUND: To determine prevalence, clinical implication, and risk factors for aortic root dilation (ARD) in pediatric heart transplant recipients. METHODS: Serial echocardiograms were reviewed in all pediatric heart transplant recipients from 1999 to 2014 to assess maximal systolic diameter at the aortic annulus, aortic sinus, aortic sino-tubular (ST) junction, and ascending aorta. ARD was defined by a sinus/annulus ratio >1.56, ST junction/annulus ratio >1...
June 23, 2017: Echocardiography
https://www.readbyqxmd.com/read/28646428/effects-of-carvacrol-on-survival-mesenteric-blood-flow-aortic-function-and-multiple-organ-injury-in-a-murine-model-of-polymicrobial-sepsis
#8
Erdem Kamil Ozer, Mustafa Tugrul Goktas, Aysun Toker, Hulagu Bariskaner, Ceyhan Ugurluoglu, Alper Bektas Iskit
Carvacrol (CRV) has strong cytoprotective, antioxidant, and anti-inflammatory properties. We aimed to demonstrate the possible protective effects of CRV on survival, mesenteric artery blood flow (MBF), vascular reactivity, and oxidative and inflammatory injuries in a murine model of polymicrobial sepsis induced by cecal ligation and puncture (CLP). Wistar rats were allocated into the following four groups: Sham, CLP, Sham + CRV, and CLP + CRV. The animals were orally administered with CRV (80 mg/kg/day) or vehicle (corn oil; 1 mL/kg/day) for 7 days...
June 23, 2017: Inflammation
https://www.readbyqxmd.com/read/28646427/tanshinone-iia-attenuates-atherosclerosis-in-apolipoprotein-e-knockout-mice-infected-with-porphyromonas-gingivalis
#9
Yan Xuan, Yue Gao, Hao Huang, Xiaoxuan Wang, Yu Cai, Qing Xian Luan
Tanshinone IIA (TSA), a pharmacologically active component isolated from Danshen, may prevent cardiovascular diseases due to its anti-inflammatory, anti-oxidative, and anti-adipogenic effects. Porphyromonas gingivalis, a major periodontal pathogen, may contribute to the progression of atherosclerosis. Here, we studied the effects of TSA on atherosclerosis in ApoE(-/-) mice with P. gingivalis infection. Eight-week-old ApoE(-/-) mice were randomized to (a) phosphate-buffered saline (PBS), (b) P. gingivalis, and (c) P...
June 23, 2017: Inflammation
https://www.readbyqxmd.com/read/28646121/at1-receptor-blockade-attenuates-outward-aortic-remodeling-associated-with-diet-induced-obesity-in-mice
#10
Friedrich Krueger, Kai Kappert, Anna Foryst-Ludwig, Frederike Kramer, Markus Clemenz, Aleksandra Grzesiak, Manuela Sommerfeld, Jan Paul Bernhard Frese, Andreas Greiner, Ulrich Kintscher, Thomas Unger, Elena Kaschina
The renin-angiotensin-system and obesity have been implicated in vascular outward remodeling, including aneurysms, but the precise mechanisms are yet not understood. We investigated the effect of the angiotensin AT1-receptor antagonist telmisartan on aortic outward remodeling in a diet-induced obesity-model in mice. C57/Black6J mice were fed with either a low-fat diet (LFD), or a high-fat diet (HFD) for 14 weeks. One group of HFD-mice was additionally exposed to telmisartan (3mg/kg/d) for the last 4 weeks. HFD led to aortic outward remodeling, characterized by increased proteolysis, along with structural changes, such as fragmentation of elastic fibres, and decreased elastin content...
June 23, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28645847/cardiovascular-morphometry-with-high-resolution-3d-magnetic-resonance-first-application-to-left-ventricle-diastolic-dysfunction
#11
Diego Gallo, Orestis Vardoulis, Pierre Monney, Davide Piccini, Panagiotis Antiochos, Juerg Schwitter, Nikolaos Stergiopulos, Umberto Morbiducci
In this study, an image-based morphometry toolset quantifying geometric descriptors of the left ventricle, aorta and their coupling is applied to investigate whether morphological information can differentiate between subjects affected by diastolic dysfunction (patient group) and their age-matched controls (control group). The ventriculo-aortic region of 20 total participants (10 per group) were segmented from high-resolution 3D magnetic resonance images, from the left ventricle to the descending aorta. Each geometry was divided into segments in correspondence of anatomical landmarks...
June 21, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28645796/preclinical-testing-of-frequency-tunable-capacitive-micromachined-ultrasonic-transducer-probe-prototypes
#12
Martin Pekař, Alexander F Kolen, Harm Belt, Frank van Heesch, Nenad Mihajlović, Imo E Hoefer, Tamas Szili-Török, Hendrik J Vos, Johan G Bosch, Gijs van Soest, Antonius F W van der Steen
In intracardiac echocardiography (ICE) it may be beneficial to generate ultrasound images acquired at multiple frequencies, having the possibility of high penetration or high-resolution imaging in a single device. The objective of the presented work is to test two frequency-tunable probe prototypes in a preclinical setting: a rigid probe having a diameter of 11 mm and a new flexible and steerable 12-Fr ICE catheter. Both probes feature a forward-looking 32-element capacitive micromachined ultrasonic transducer array (aperture of 2 × 2 mm(2)) operated in collapse mode, which allows for frequency tuning in the 6-MHz-18-MHz range...
June 20, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28644901/vascular-geometry-as-a-risk-factor-for-non-penetrating-traumatic-injuries-of-the-aortic-arch
#13
Andreas Schicho, Lukas Luerken, Christian Stroszczynski, Ramona Meier, Andreas G Schreyer, Lena-Marie Dendl, Stephan Schleder
PURPOSE: To assess biomechanical factors in aortic arch geometry contributing to the development of non-penetrating aortic arch injury (NAAI) in multiply injured patients with an Injury Severity Score (ISS) ≥ 16. MATERIAL AND METHODS: 230 consecutive multiply injured trauma patients with an ISS ≥ 16 admitted to our Level-I trauma center during a consecutive 24-month period were prospectively included of whom 13 presented with NAAI (5.7%). Standardized whole-body CT in a 2x128-detector-row scanner included a head-and-neck CTA...
2017: PloS One
https://www.readbyqxmd.com/read/28643678/prevalence-of-factors-related-to-vascular-calcifications-in-patients-with-chronic-kidney-disease-on-dialysis
#14
Guillermo Rosa-Diez, Griselda Bratti, Graciela Filannino, Adriana Peñalba, Fabián Otreras, Miriam Ledesma, Martín Ortemberg, Gustavo Laham, Mariana Vásquez-Durand, Soledad Crucelegui, Mariano Forrester, Carlos Musso, Marcelo Orias, Ricardo Heguilen, Carlos Díaz, Ricardo García-Mónaco, Oscar Velan, Hernán Trimarchi
The main aim of the study was to determine the prevalence of vascular calcifications in patients with chronic kidney disease on dialysis in our population assessed by X-ray. The secondary objectives were to determine the cardiovascular risk factors associated with the presence of vascular calcifications and to evaluate the complementary use of the echocardiogram in a cross-sectional, observational, multicentric study. We included patients with chronic kidney disease on dialysis, age =18 years with at least 3 months of renal replacement therapy in 8 dialysis centres in Argentina...
2017: Medicina
https://www.readbyqxmd.com/read/28643474/long-term-failure-of-amplatzer-plugs-in-the-treatment-of-aortic-pathology
#15
Jeremy Song, Benjamin Ascherman, Kyle W Eudailey, Monir Mohar, Michael Argenziano, Hiroo Takayama, Isaac George
We present two cases of Amplatzer® device deployment that exhibited long-term failure necessitating surgical correction. The first case illustrates recanalization of a ruptured Valsalva aneurysm with worsening aortic insufficiency after percutaneous repair with the Amplatzer Vascular Plugs and Amplatzer duct occluder, while the second case illustrates recanalization after deployment of the Amplatzer septal occluder in a patient with a pseudoaneursym in a bovine aorta after type I aortic dissection repair. These two cases illustrate the potential long-term complications and limitations in durability with these devices...
June 23, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28642793/repair-of-thoracoabdominal-aortic-aneurysm-with-thrombosed-infrarenal-component-a-modified-hybrid-technique-without-aortic-cross-clamping
#16
Hussam Abou-Al-Shaar, Khaled J Zaza, Muhammad Anees Sharif, Samer Koussayer
The authors report the successful repair of a Crawford type III thoracoabdominal aortic aneurysm (TAAA) with a thrombosed infrarenal component using a modified hybrid technique without aortic clamping in a high-risk patient. A 64-year-old male with a history of hypertension, diabetes, and severe chronic obstructive pulmonary disease presented with acute on chronic backache and bilateral short distance claudication. A computerized tomography scan demonstrated a large, nonleaking Crawford type III TAAA with thrombosed infrarenal component of the aneurysm...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28642639/foregut-duplication-cysts-in-children
#17
Keshawadhana Balakrishnan, Frances Fonacier, Shilpa Sood, Natasha Bamji, Howard Bostwick, Gustavo Stringel
BACKGROUND AND OBJECTIVES: Duplications of the alimentary tract are rare anomalies. We report our experience with foregut duplication cysts including their clinical presentation, diagnostic modalities, and surgical management. METHODS: We report a 20-year retrospective review of all foregut duplication cysts managed at our institution. RESULTS: Twelve patients with 13 foregut duplication cysts were identified. The ages of the children at the time of surgery ranged from infancy to adolescence, with a mean age of 7...
April 2017: JSLS: Journal of the Society of Laparoendoscopic Surgeons
https://www.readbyqxmd.com/read/28642593/transforming-growth-factor-%C3%AE-1-regulates-the-nascent-hematopoietic-stem-cell-niche-by-promoting-gluconeogenesis
#18
C-Y Zhang, H-M Yin, H Wang, D Su, Y Xia, L-F Yan, B Fang, W Liu, Y-M Wang, A-H Gu, Y Zhou
The understanding of hematopoietic stem cell (HSC) emergence is important to generate HSCs from pluripotent precursors. However, integrated signaling network that regulates the niche of nascent HSCs remains unclear. Herein, we uncovered a novel role of TGF-β1 in the metabolic niche of HSC emergence using the tgf-β1b(-/-) zebrafish. Our findings first showed that Tgf-β1 transcripts were enriched in the nascent HSCs. Loss of tgf-β1b caused a decrease of nascent HSCs within the aorta-gonad-mesonephros. Moreover, tgf-β1b(+) cells were runx1(+) HSCs and underwent an endothelial-to-hematopoietic-transition process...
June 23, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28642176/microsurgical-bypass-training-rat-model-part-2-anastomosis-configurations
#19
Ali Tayebi Meybodi, Michael T Lawton, Sonia Yousef, Pooneh Mokhtari, Sirin Gandhi, Arnau Benet
BACKGROUND: Mastery of microsurgical anastomosis is key to achieving good outcomes in cerebrovascular bypass procedures. Animal models (especially rodents) provide an optimal pre-clinical bypass training platform. However, the existing models for practicing different anastomosis configurations have several limitations. OBJECTIVE: We sought to optimize the use of the rat's abdominal aorta and common iliac arteries (CIA) for practicing the 3 main anastomosis configurations commonly used in cerebrovascular surgery...
June 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28642109/neoaortic-xenoprosthetic-grafts-for-treatment-of-mycotic-aneurysms-and-infected-aortic-grafts
#20
C Anibueze, V Sankaran, U Sadat, K Tan, Y G Wilson, R E Brightwell, M S Delbridge, P W Stather
OBJECTIVE: There is no international consensus regarding the optimum management of infected aortae (mycotic aneurysms, infected aortic grafts). Neoaortoiliac reconstruction has advantages over extra anatomical bypass grafting; however use of autologous vein is associated with venous hypertension and compartment syndrome, alternatively cadaveric homografts are associated with high rates of perianastomotic haemorrhage, limb occlusion and pseudoaneurysm. Arterial repair using xenoprosthetic patches is associated with lower infection rates compared to the use of prosthetic material...
June 19, 2017: Annals of Vascular Surgery
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