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https://www.readbyqxmd.com/read/29775572/gene-therapy-with-antisense-oligonucleotides-silencing-c-myc-reduces-neointima-formation-and-vessel-wall-thickness-in-a-mouse-model-of-vein-graft-disease
#1
Christina Maria Steger, Nikolaos Bonaros, Ralf Joachim Rieker, Johannes Bonatti, Thomas Schachner
Gene therapy for avoiding intimal hyperplasia of vein grafts after coronary artery bypass grafting is still discussed controversially. A promising application of gene therapy in vein grafts is the use of antisense oligonucleotides to block the expression of genes encoding cell cycle regulatory proteins in vascular smooth muscle cells. C-myc, either directly or by regulating the expression of other proteins, controls cell proliferation, apoptosis and cell survival, tissue remodeling, angiogenesis, cell metabolism, production of inflammatory and anti-inflammatory cytokines, and also participates in cell transformation...
May 15, 2018: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/29752040/mesenchymal-stem-cell-derived-microvesicles-alleviate-pulmonary-arterial-hypertension-by-regulating-renin-angiotensin-system
#2
Zhenjun Liu, Jinghu Liu, Mengyuan Xiao, Junxian Wang, Feng Yao, Weikai Zeng, Liqin Yu, Yuejie Guan, Wenyan Wei, Zijian Peng, Kunpeng Zhu, Jin Wang, Zhongyuan Yang, Jixin Zhong, Jianying Chen
In recent years, microvesicles (MVs) derived from mesenchymal stem cells (MSCs) have been proved to be able to improve the outcome of pulmonary arterial hypertension (PAH) in many respects, but the underlying mechanisms of it still remain unclear. Because the renin-angiotensin system (RAS) has been found to be closely related to PAH, the present study was designed to investigate whether the effect of MSC-derived MVs on PAH was correlated with RAS. MVs were isolated and purified from bone marrow MSCs. PAH rat models were established by a single intraperitoneal injection of 1% monocrotaline (MCT, 50 mg/Kg)...
March 15, 2018: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/29745181/-analysis-and-comprehensive-evaluation-on-cold-resistance-of-six-varieties-of-michelia
#3
Rui Xue Li, Xiao Ling Jin, Xi Jun Hu, Yi Xia Chai, Meng Ying Cai, Feng Luo, Fang Jing Zhang
Taking six varieties of Michelia as test materials, their responses under cold situation in the field were investigated and the semilethal low temperatures were calculated by fitting Logistic equation. The nine structure indexes of leaf tissue were observed by paraffin section, and a comprehensive evaluation on cold resistance of different varieties was given according to subordinate function value analysis. The results showed that the relative electrical conductivity of six varieties of Michelia was significantly positively correlated with the semilethal low temperature (LT50 ) of 3 h 0-25 ℃ treatment...
May 18, 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29733777/morphological-and-structural-changes-of-umbilical-veins-and-clinical-significance-in-preeclampsia
#4
Yonghong Lan, Zhi Yang, Mingmei Huang, Zhigang Cui, Yaling Qi, Haiyan Niu
OBJECTIVE: Preeclampsia is a common complication of pregnancy that is characterized by high blood pressure. Preeclampsia can have both negative maternal and fetal effects, including impaired fetal development from reduced placental perfusion. Because umbilical vessels provide fetal blood supply, morphological changes in these vessels can critically affect fetal function. This study investigated morphological and structural changes in umbilical veins from 17 controls and 19 preeclampsia cases...
May 7, 2018: Hypertension in Pregnancy
https://www.readbyqxmd.com/read/29707504/tracheobronchoplasty-for-tracheomalacia
#5
Cameron D Wright, Douglas J Mathisen
Tracheobronchomalacia is an uncommon acquired disorder of the central airways. Common symptoms include dyspnea, constant coughing, inability to raise secretions and recurrent respiratory infections. Evaluation includes an inspiratory-expiratory chest computed tomography (dynamic CT), an awake functional bronchoscopy and pulmonary function studies. Patients with significant associated symptoms and severe collapse on CT and bronchoscopy are offered membraneous wall plication. Tracheobronchoplasty is performed through a right thoracotomy...
March 2018: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29697667/-features-of-the-pathogenesis-of-the-placenta-growing-in-the-scar-after-cesarean-section
#6
I V Barinova, N I Kondrikov, I N Voloshchuk, M A Chechneva, N A Shchukina, V A Petrukhin
OBJECTIVE: to investigate the structural and pathogenetic features of pathological placental attachment in the scar after cesarean section. MATERIAL AND METHODS: The investigators explored 12 uteri; 11 of which were removed with placentas at 9 to 38 weeks' gestation (one in the first trimester, three at 18-22 weeks, two at 32-35 weeks, and five at 37-38 weeks); one uterus was removed after an artificial abortion at 12 weeks' gestation in the scar, as well as the scars excised in the first trimester in non-developing (n=4) and progressive (n=2) pregnancies...
2018: Arkhiv Patologii
https://www.readbyqxmd.com/read/29692666/recanalization-and-remodeling-of-the-great-saphenous-vein-caused-by-the-large-melanoma-s-cutaneous-metastasis
#7
Przemysław Stefaniak, Przemysław Kwiatkowski, Zygmunt Kozielec, Janusz Godlewski
Aim of the study: Large melanoma tumour caused arterial remodelling of the distal part of the great saphenous vein. The metastasis occurred at the site where inguinal lymphadenectomy was previously performed and the proximal part of the great saphenous vein was resected.The aim of this study is the presentation of such a rare observation and literature overview concerning melanoma metastasis and possible stimuli causing remodelling of veins. Material and methods: Macroscopic and microscopic analyses of the large blood vessel that supplies melanoma were made...
2018: Contemporary Oncology Współczesna Onkologia
https://www.readbyqxmd.com/read/29682294/duragraft-vascular-conduit-preservation-solution-in-patients-undergoing-coronary-artery-bypass-grafting-rationale-and-design-of-a-within-patient-randomised-multicentre-trial
#8
Walid Ben Ali, Pierre Voisine, Peter Skov Olsen, Hugues Jeanmart, Nicolas Noiseux, Tracy Goeken, Vilas Satishchandran, Filippo Cademartiri, Garry Cutter, Dave Veerasingam, Craig Brown, Maximilian Y Emmert, Louis P Perrault
Introduction: Saphenous vein grafts (SVGs) remain the most often used conduits in coronary artery bypass grafting (CABG). However, they are prone to vein graft disease (VGD) during follow-up, which may compromise clinical outcomes. Injury to the SVG endothelium during harvesting and storage promotes neointimal hyperplasia that can advance to atherosclerosis characterised by SVG failure. This trial investigates the potential benefit of DuraGraft, a novel, one-time intraoperative graft treatment developed to efficiently protect the structural and functional integrity of the vascular endothelium, on the development and progression of VGD in CABG patients...
2018: Open Heart
https://www.readbyqxmd.com/read/29668853/the-links-between-leaf-hydraulic-vulnerability-to-drought-and-key-aspects-of-leaf-venation-and-xylem-anatomy-among-26-australian-woody-angiosperms-from-contrasting-climates
#9
Chris J Blackman, Sean M Gleason, Alicia M Cook, Yvonne Chang, Claire A Laws, Mark Westoby
Background and Aims: The structural properties of leaf venation and xylem anatomy strongly influence leaf hydraulics, including the ability of leaves to maintain hydraulic function during drought. Here we examined the strength of the links between different leaf venation traits and leaf hydraulic vulnerability to drought (expressed as P50leaf by rehydration kinetics) in a diverse group of 26 woody angiosperm species, representing a wide range of leaf vulnerabilities, from four low-nutrient sites with contrasting rainfall across eastern Australia...
April 14, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29622968/atherosclerosis-in-chronic-hepatitis-c-virus-patients-with-and-without-liver-cirrhosis
#10
Ashraf Abd El-Khalik Barakat, Fatma Mohammad Nasr, Amna Ahmed Metwaly, Sherif Morsy, Mervat Eldamarawy
Background: Chronic Hepatitis C virus (HCV) infection and liver cirrhosis may be associated with atherosclerosis and coronary artery disease (CAD). There are two phases to atherosclerosis, Subclinical and Clinical. Assessment of atherosclerosis may be started at its Subclinical phase by the evaluation of Epicardial Fat Thickness (EpFT) and Carotid Intima Thickness (CIMT). Aim of the study: The aim of the study was to evaluate Clinical and Subclinical atherosclerosis in chronic HCV patients with and without liver cirrhosis by evaluating CIMT and EpFT and correlating the results with Child-Pugh functional scoring of cirrhosis as well as with ultrasound and laboratory parameters that define the severity of liver disease...
June 2017: The Egyptian heart journal: (EHJ): official bulletin of the Egyptian Society of Cardiology
https://www.readbyqxmd.com/read/29501904/distinct-vascular-remodeling-pattern-of-adult-rats-with-carotid-jugular-shunt
#11
Ping Lü, Qibin Jiao, Daisuke Shimura, Yoichiro Kusakari, Fang Liu, Susumu Minamisawa
BACKGROUND: Previous research has revealed that patent vein grafts lose their venous identity Eph-B4 but do not gain arterial identity ephrin-B2 during adaptation to the arterial circulation, and vascular identity marker, for example, the Eph-B4 signaling is a critical determinant of venous wall thickness of vein grafts. But what is the remodeling pattern, especially the remodeling pattern of vascular identity in the venous segment of arteriovenous shunt at a late stage postoperation has not been fully explored...
May 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29470246/design-and-evaluation-of-a-structural-reinforced-small-intestinal-submucosa-vascular-graft-for-hemodialysis-access-in-a-porcine-model
#12
Juliana Jaramillo, Karen T Valencia-Rivero, Francisco J Cedano-Serrano, Rocío López, Néstor Sandoval, Juan C Briceño
Synthetic vascular access for hemodialysis exhibits biological and mechanical material properties mismatch with the native vessels. These limitations prevent infiltration of endothelial cells and decrease grafts long-term patency, particularly in small diameter vessels. We aimed to design a curved structural reinforced small intestinal submucosa (SIS) vascular graft for hemodialysis access and to evaluate in a porcine animal model graft patency by Doppler ultrasonography, tissue remodeling by histology, and vascular wall Young's modulus after implantation by biaxial tensile test...
March 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29451331/sliding-free-transverse-rectus-abdominis-myocutaneous-flap-for-closure-of-a-massive-abdominal-wall-defect-a-case-report
#13
Annika Senghaas, Thomas Kremer, Volker J Schmidt, Leila Harhaus, Christoph Hirche, Ulrich Kneser, Amir K Bigdeli
Despite considerable advances in reconstructive surgery, massive abdominal wall defects continue to pose a significant surgical challenge. We report the case of a 72-year-old morbidly obese female patient with Clostridium septicum-related gas gangrene of the abdominal wall. After multidisciplinary treatment and multiple extensive debridements, a massive full-thickness defect (40 cm × 35 cm) of the right abdominal wall was present. The abdominal contents were covered with a resorbable mesh to prevent evisceration...
February 16, 2018: Microsurgery
https://www.readbyqxmd.com/read/29446840/uncontrolled-blood-pressure-affects-atrial-remodeling-and-adverse-clinical-outcome-in-paroxysmal-atrial-fibrillation
#14
Masashi Kamioka, Naoko Hijioka, Yoshiyuki Matsumoto, Minoru Nodera, Takashi Kaneshiro, Hitoshi Suzuki, Yasuchika Takeishi
BACKGROUND: To investigate the impact of uncontrolled blood pressure (BP) on left atrial (LA) remodeling and clinical outcome after pulmonary vein isolation (PVI) in paroxysmal atrial fibrillation (AF). METHODS: One hundred and one symptomatic paroxysmal AF patients (85 males, 62.2 ± 8.4-year-old) who underwent successful PVI were classified as follows: group 1 (n = 46), no hypertension (HTN); group 2 (n = 36), HTN with controlled BP; and group 3 (n = 19), HTN with uncontrolled BP...
April 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29434696/tmem16a-regulates-portal-vein-smooth-muscle-cell-proliferation-in-portal-hypertension
#15
Xi Zeng, Ping Huang, Mingkai Chen, Shiqian Liu, Nannan Wu, Fang Wang, Jing Zhang
The aim of the present study was to elucidate the effect of transmembrane protein 16A (TMEM16A) on portal vein smooth muscle cell (PVSMC) proliferation associated with portal vein remodeling in portal hypertension (PHT). Sprague-Dawley rats were subjected to bile duct ligation to establish a rat model of liver cirrhosis and PHT. Sham-operated animals served as controls. At 8 weeks after bile duct ligation, the extent of liver fibrosis and the portal vein wall thickness were assessed using hematoxylin-eosin staining...
January 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29416468/nonfatal-cardiac-perforation-after-central-venous-catheter-insertion
#16
Vedran Premuzic, Lea Katalinic, Marijan Pasalic, Hrvoje Jurin
Cardiac tamponade caused by perforation of the cardiac wall is a rare complication related to central venous catheter (CVC) placement. A 71-year-old female with a previous history of moderate aortic stenosis and kidney transplantation was admitted to hospital due to global heart failure and worsening of allograft function. Intensified hemodialysis was commenced through a CVC placed in the right subclavian vein. Chest radiography revealed catheter tip in the right atrium and no signs of pneumothorax. Thorough diagnostics outruled immediate life-threatening conditions, such as myocardial infarction and pulmonary embolism...
January 2018: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/29388161/modified-end-to-side-double-layer-open-pancreaticogastrostomy-after-whipple-procedure-surgical-tips-for-a-safe-anastomosis
#17
Raffaele Dalla Valle, Matteo Rossini, Laura Lamecchi, Maurizio Iaria
Pancreatic fistula (PF) remains the Achilles' heel of pancreaticoduodenectomy (PD). Pancreaticogastrostomy (PG) appears to be associated with a lower risk of postoperative leak according to recent evidence. We started to fashion PG, especially in soft pancreas, modifying the original technique described by Bassi. At our institution, 105 PD procedures were carried out from January 2011 to December 2016; pancreatic-enteric continuity was restored by PG in 35 cases. Superior mesenteric/portal vein resection/reconstruction was necessary in three patients...
March 2018: Updates in Surgery
https://www.readbyqxmd.com/read/29387186/effect-of-recombinant-adeno-associated-virus-expressing-calcitonin-gene-related-peptide-on-chick-embryo-umbilical-artery-vasospasm-model
#18
Yongjie Yuan, Si Yang, Chao Li, Kan Xu, Jinlu Yu
In the present study, a recombinant adeno-associated virus vector containing the calcitonin gene related peptide gene (rAAV-CGRP) was constructed and the therapeutic effect of rAAV-CGRP on a chick umbilical artery vasospasm model induced by chick embryo allantoic cavity hemorrhage was investigated. Fresh specific pathogen-free fertilized chicken eggs were randomly divided into a rAAV-CGRP group, an empty vector virus (AAV) group, and a control group, with 24 eggs in each group. An umbilical arterial vasospasm model was established using a needle puncture method on a vein in the chorioallantoic membrane to induce a hemorrhage in the allantoic cavity of 11-day-old chicken embryonated eggs...
January 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29344304/atherosclerosis-is-exacerbated-by-chitinase-3-like-1-in-amyloid-precursor-protein-transgenic-mice
#19
Yu Yeon Jung, Ki Cheon Kim, Mi Hee Park, Youngsik Seo, Heonyong Park, Min Hee Park, Jun Chang, Dae Youn Hwang, Sang Bae Han, Sanghyeon Kim, Dong Ju Son, Jin Tae Hong
Although the important role of amyloid precursor protein (APP) in vascular diseases associated with Alzheimer's disease (AD) has been demonstrated, the underlying molecular mechanisms and physiological consequences are unclear. We aimed to evaluate vascular inflammation and atherosclerosis in Swedish mutant of human APP transgenic (APPsw-Tg) and ApoE-/-/APPsw-Tg mice. We also aimed to explore the mechanisms underlying any changes observed in these mice compared with non-Tg controls. Methods: The transgenic and non-Tg mouse strains were subjected to partial ligation of the left carotid artery to induce atherosclerotic changes, which were measured using histological approaches, immunohistochemistry, quantitative polymerase chain reaction, and gene expression microarrays...
2018: Theranostics
https://www.readbyqxmd.com/read/29327276/portal-congestion-and-intestinal-edema-in-hospitalized-patients-with-heart-failure
#20
Yuki Ikeda, Shunsuke Ishii, Mayu Yazaki, Teppei Fujita, Yuichiro Iida, Toyoji Kaida, Takeru Nabeta, Eiji Nakatani, Emi Maekawa, Tomoyoshi Yanagisawa, Toshimi Koitabashi, Takayuki Inomata, Junya Ako
An interaction between the intestine and cardiovascular disease has been suggested. We thought to clarify the association between intestinal conditions and clinical outcomes in patients with heart failure (HF). Hemodynamic parameters in intestinal vessels [superior mesenteric artery (SMA), inferior mesenteric artery (IMA), and portal vein (PV)] and average colon wall thickness (aCWT) from the ascending colon to sigmoid colon were evaluated in 224 hospitalized HF patients. Echocardiographic parameters and composite event rates (all-cause mortality, readmission for HF deterioration, major ventricular arrhythmias) were also examined...
January 11, 2018: Heart and Vessels
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