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https://www.readbyqxmd.com/read/27920724/insulin-induces-relaxation-and-decreases-hydrogen-peroxide-induced-vasoconstriction-in-human-placental-vascular-bed-in-a-mechanism-mediated-by-calcium-activated-potassium-channels-and-l-arginine-nitric-oxide-pathways
#1
Lissette Cabrera, Andrea Saavedra, Susana Rojas, Marcela Cid, Cristina Valenzuela, David Gallegos, Pamela Careaga, Emerita Basualto, Astrid Haensgen, Eduardo Peña, Coralia Rivas, Juan Carlos Vera, Victoria Gallardo, Leandro Zúñiga, Carlos Escudero, Luis Sobrevia, Mark Wareing, Marcelo González
HIGHLIGHTS Short-term incubation with insulin increases the L-arginine transport in HUVECs.Short-term incubation with insulin increases the NO synthesis in HUVECs.Insulin induces relaxation in human placental vascular bed.Insulin attenuates the constriction induced by hydrogen peroxide in human placenta.The relaxation induced by insulin is dependent on BKCa channels activity in human placenta. Insulin induces relaxation in umbilical veins, increasing the expression of human amino acid transporter 1 (hCAT-1) and nitric oxide synthesis (NO) in human umbilical vein endothelial cells (HUVECs)...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27901163/synthesis-and-biological-evaluation-of-simplified-pironetin-analogues-with-modifications-in-the-side-chain-and-the-lactone-ring
#2
Steven Roldán, Adrià Cardona, Laura Conesa, Juan Murga, Eva Falomir, Miguel Carda, J Alberto Marco
The preparation of several new analogues of the natural dihydropyrone pironetin is described. They differ from the natural product mainly in the nature of the side chain and the lactone ring. Their cytotoxic activity has been measured. In addition, their interaction with tubulin, their ability to inhibit the secretion of the vascular endothelial growth factor (VEGF) and the expression of angiogenesis and telomerase-related genes have been determined. Unexpectedly, and unlike pironetin, the lactones studied in this work do not interact with tubulin...
November 30, 2016: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/27894859/brown-tumour-in-phalanx-of-the-ring-finger-due-to-chronic-kidney-failure-a-case-report
#3
J E Forigua V, R A Brunicardi H, C A Morales V, M Del P Archila, D M Chaparro Rivera
Brown tumours are highly vascular lytic bone lesions found in primary and secondary hyperparathyroidism. The brown term is given due to the red-brown colour of the tissue, which is due to the accumulation of hemosiderin. The case is presented of a 29 year-old male with chronic renal failure, who had a mass in the tip of the ring finger after a trauma of 4 months onset, which had increased progressively in size and pain. He was treated surgically, by amputation, with no recurrence 10 months after the surgery...
November 25, 2016: Revista Española de Cirugía Ortopédica y Traumatología
https://www.readbyqxmd.com/read/27891547/severe-pelvic-injury-vascular-lesions-detected-by-ante-and-post-mortem-contrast-medium-enhanced-ct-and-associations-with-pelvic-fractures
#4
Mahmoud Hussami, Silke Grabherr, Reto A Meuli, Sabine Schmidt
OBJECTIVES: The objectives of this study were to compare arterial and venous contrast medium extravasation in severe pelvic injury detected by ante- and post-mortem multi-detector CT (MDCT) and determine whether vascular injury is associated with certain types of pelvic fracture. METHODS: We retrospectively included two different cohorts of blunt pelvic trauma with contrast medium extravasation shown by MDCT. The first group comprised 49 polytrauma patients; the second included 45 dead bodies undergoing multi-phase post-mortem CT-angiography (MPMCTA)...
November 28, 2016: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/27890480/chemerin-induced-arterial-contraction-is-gi-and-calcium-dependent
#5
David J Ferland, Emma S Darios, Richard R Neubig, Benita Sjögren, Nguyen Truong, Rosa Torres, Thomas S Dexheimer, Janice M Thompson, Stephanie W Watts
Chemerin is an adipokine associated with increased blood pressure, and may link obesity with hypertension. We tested the hypothesis that chemerin-induced contraction of the vasculature occurs via calcium flux in smooth muscle cells. Isometric contraction of rat aortic rings was performed in parallel with calcium kinetics of rat aortic smooth muscle cells to assess the possible signaling pathway. Chemerin-9 (nonapeptide of the chemerin S(157) isoform) caused a concentration-dependent contraction of isolated aorta (EC50 100nM) and elicited a concentration-dependent intracellular calcium response (EC50 10nM)...
November 24, 2016: Vascular Pharmacology
https://www.readbyqxmd.com/read/27889287/structure-activity-relationship-study-of-a-small-cyclic-peptide-h-c-lys-pro-glu-arg-oh-a-potent-inhibitor-of-vascular-endothelial-growth-factor-interaction-with-neuropilin-1
#6
Karolina Grabowska, Anna K Puszko, Piotr F J Lipiński, Anna K Laskowska, Beata Wileńska, Ewa Witkowska, Gerard Y Perret, Aleksandra Misicka
Inhibition of angiogenesis is one of the most promising approaches in anticancer therapy. It was recently suggested that Neuropilin-1 (NRP-1) in tumour cells may serve as a separate receptor for Vascular Endothelial Growth Factor-165 (VEGF165) which is one of the main pro-angiogenic agents in the organism. Therefore molecules inhibiting VEGF165 binding to NRP-1 could be potential candidates for new antiangiogenic and anticancer drugs. Here we present a structure-activity relationship study of the peptide H-c[Lys-Pro-Glu]-Arg-OH which showed high inhibitory effect on VEGF165/NRP-1 binding (IC50=0...
November 14, 2016: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/27888581/vascular-toxicity-risk-assessment-of-mc18-and-mc70-novel-potential-diagnostic-tools-for-in-vivo-pet-studies
#7
Fabio Fusi, Miriam Durante, Claudia Sticozzi, Maria Frosini, Maria G Perrone, Nicola A Colabufo, Simona Saponara
The P-glicoprotein (P-gp) inhibitor MC18 has been recently proposed as a valuable PET tracer to measure P-gp expression in vivo. The aim of this study was to evaluate the toxic hazard towards the vasculature of MC18 along with the structurally related and more potent P-gp inhibitor MC70. Their effects on A7r5 and EA.hy926 cells viability, on the mechanical activity of fresh and cultured rat aorta rings as well as on Cav 1.2 channel current (ICa1.2 ) of A7r5 cells were studied. At concentrations >10 μM, MC18 and MC70 decreased cell viability causing evident morphological changes...
November 26, 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27884622/exercise-modulates-the-aortic-renin-angiotensin-system-independently-of-estrogen-therapy-in-ovariectomized-hypertensive-rats
#8
Patrick W Endlich, Erick R G Claudio, Leandro C F Lima, Rogério F Ribeiro Júnior, Antonio A B Peluso, Ivanita Stefanon, Nazaré S Bissoli, Virginia S Lemos, Robson A S Dos Santos, Glaucia R de Abreu
The renin-angiotensin-system is an important component of cardiovascular control and is up-regulated under various conditions, including hypertension and menopause. The aim of this study was to evaluate the effects of swimming training and estrogen therapy (ET) on angiotensin-II (ANG II)-induced vasoconstriction and angiotensin-(1-7) [ANG-(1-7)]-induced vasorelaxation in aortic rings from ovariectomized spontaneously hypertensive rats. Animals were divided into Sham (SH), Ovariectomized (OVX), Ovariectomized treated with E2 (OE2), Ovariectomized plus swimming (OSW) and Ovariectomized treated with E2 plus swimming (OE2+SW) groups...
November 21, 2016: Peptides
https://www.readbyqxmd.com/read/27882226/effect-of-dehydration-heat-exposure-on-thoracic-aorta-reactivity-in-rats
#9
Yao Geng, Lingqin Zhu, Fadong Liu, Xiaodan Zhu, Jianguo Niu, Guanghua Li
The aim of the present study was to investigate the effect of one week dehydration heat exposure on thoracic aorta reactivity in rats. Eighteen Male Sprague-Dawley rats were randomly divided into 3 groups (n=6 each group): Control group (CN), heat exposure group (HE), dehydration heat exposure group (DHE). The CN group was exposed to a room temperature of 24°C, while the HE and DHE groups were exposed to a heat temperature of 32°C. After 7 days of heat exposure, the heart rate and blood pressure of the rats were measured, and the noradrenaline (NA)-induced contraction on the aorta rings was measured by tension recording...
November 2016: Biomedical Reports
https://www.readbyqxmd.com/read/27881847/epigenetic-regulation-of-l-type-voltage-gated-ca-2-channels-in-mesenteric-arteries-of-aging-hypertensive-rats
#10
Jingwen Liao, Yanyan Zhang, Fang Ye, Lin Zhang, Yu Chen, Fanxing Zeng, Lijun Shi
Accumulating evidence has shown that epigenetic regulation is involved in hypertension and aging. L-type voltage-gated Ca(2+) channels (LTCCs), the dominant channels in vascular myocytes, greatly contribute to arteriole contraction and blood pressure (BP) control. We investigated the dynamic changes and epigenetic regulation of LTCC in the mesenteric arteries of aging hypertensive rats. LTCC function was evaluated by using microvascular rings and whole-cell patch-clamp in the mesenteric arteries of male Wistar-Kyoto rats and spontaneously hypertensive rats at established hypertension (3 month old) and an aging stage (16 month old), respectively...
November 24, 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/27862163/the-effects-of-high-sodium-intake-on-systemic-blood-pressure-and-vascular-responses-in-spontaneously-diabetic-wbn-kob-lepr-fa-fa-rats
#11
Yoshiichi Takagi, Haruno Kadowaki, Ikumi Kobayashi, Kaoru Ito, Katsuaki Ito, Mitsuyuki Shirai, Fumitoshi Asai
The prevalence of type 2 diabetes mellitus (T2DM) and hypertension has markedly increased worldwide. The purpose of the present study was to examine the effects of a high-salt intake on the systolic blood pressure (SBP) and vascular responses in WBN/Kob-Lepr(fa/fa) (WBKDF) rats, a new spontaneous animal model of T2DM. Male WBKDF rats and age-matched Wistar rats at 6 weeks of age were each divided into two groups and fed either a normal-sodium (0.26%, NS) diet or high-sodium (8%, HS) diet for 14 weeks: 1) Wistar rats on NS diet (Wistar-NS); 2) Wistar rats on HS diet (Wistar-HS); 3) WBKDF rats on NS diet (WBKDF-NS); 4) WBKDF rats on HS diets (WBKDF-HS)...
November 15, 2016: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/27860551/congenital-variants-and-anomalies-of-the-aortic-arch
#12
Kate Hanneman, Beverley Newman, Frandics Chan
Congenital variants and anomalies of the aortic arch are important to recognize as they may be associated with vascular rings, congenital heart disease, and chromosomal abnormalities, and can have important implications for prognosis and management. The purpose of this article is to review cross-sectional imaging techniques used in the evaluation of the aortic arch, describe the embryology and anatomy of the aortic arch system, discuss aortic arch variants and anomalies, and review other malformations of the aortic arch, including interrupted aortic arch, hypoplastic aortic arch, and aortic coarctation...
November 18, 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/27858356/the-aortic-ring-assay-and-its-use-for-the-study-of-tumor-angiogenesis
#13
Alfred C Aplin, Roberto F Nicosia
This chapter describes protocols developed in our laboratory to prepare and analyze angiogenic cultures of rat aorta. Rings of rat aorta cultured in collagen gels produce neovessel outgrowths which reproduce ex vivo key steps of the angiogenic process including endothelial migration, proliferation, proteolytic digestion of the extracellular matrix, capillary tube formation, pericyte recruitment, and vascular regression. The angiogenic response of aortic explants can be stimulated with growth factors or inhibited with anti-angiogenic molecules...
2016: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27852478/transcatheter-mitral-valve-in-valve-therapy
#14
REVIEW
Jose F Condado, Brian Kaebnick, Vasilis Babaliaros
Valve-in-valve and valve-in-ring transcatheter mitral valve replacement can be used in for the treatment of inoperable patients with failing mitral surgical bioprosthesis or valve repairs. Preprocedural multi-image evaluation by a heart team must include transthoracic echocardiogram, transesophageal echocardiogram, and cardiac computed tomography angiography (CTA). CTA is used to determine access site (transapical, transseptal, or transatrial), transcatheter valve size, and landing zone. Though complications can occur (ie, valve embolization, bleeding, or vascular complications), this less invasive procedure has a reported success rate of 70% to 100% and is now increasingly used...
January 2016: Interventional cardiology clinics
https://www.readbyqxmd.com/read/27851877/understanding-the-continuum-of-radionecrosis-and-vascular-disorders-in-the-brain-following-gamma-knife-irradiation-an-mri-study
#15
Julie Constanzo, Laurence Masson-Côté, Luc Tremblay, Jérémie P Fouquet, Philippe Sarret, Sameh Geha, Kevin Whittingstall, Benoit Paquette, Martin Lepage
PURPOSE: The radiation dose delivered to brain tumors is limited by the possibility to induce vascular damage and necrosis in surrounding healthy tissue. In the present study, we assessed the ability of MRI to monitor the cascade of events occurring in the healthy rat brain after stereotactic radiosurgery, which could be used to optimize the radiation treatment planning. METHODS: The primary somatosensory forelimb area (S1FL) and the primary motor cortex in the right hemisphere of Fischer rats (n = 6) were irradiated with a single dose of Gamma Knife radiation (Leksell Perfexion, Elekta AG, Stockholm, Sweden)...
November 10, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27834764/vascular-ring-diagnosis-and-management-notable-trends-over-25-years
#16
William N Evans, Ruben J Acherman, Michael L Ciccolo, Sergio A Carrillo, Gary A Mayman, Carlos F Luna, Robert C Rollins, William J Castillo, Humberto Restrepo
BACKGROUND: Vascular rings (VRs) are recognized as uncommon but not rare cardiovascular malformations. METHODS: We analyzed data from all patients born in Southern Nevada, who underwent diagnosis and management of VR from 1990 to 2015, RESULTS: From 1990 to 2015, a total of 92 patients were diagnosed prenatally and postnatally. Of the 92 patients, 73 (79%) had right aortic arch and aberrant left subclavian artery (RAA-ALS) with a left ductus arteriosus or ligamentum, 17 (19%) had a double aortic arch (DAA), and 2 (2%) had a pulmonary artery sling...
November 2016: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/27833558/serelaxin-elicits-bronchodilation-and-enhances-%C3%AE-adrenoceptor-mediated-airway-relaxation
#17
Maggie Lam, Simon G Royce, Chantal Donovan, Maria Jelinic, Laura J Parry, Chrishan S Samuel, Jane E Bourke
Treatment with β-adrenoceptor agonists does not fully overcome the symptoms associated with severe asthma. Serelaxin elicits potent uterine and vascular relaxation via its cognate receptor, RXFP1, and nitric oxide (NO) signaling, and is being clinically evaluated for the treatment of acute heart failure. However, its direct bronchodilator efficacy has yet to be explored. Tracheal rings were prepared from male Sprague-Dawley rats (250-350 g) and tricolor guinea pigs, and precision cut lung slices (PCLSs) containing intrapulmonary airways were prepared from rats only...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27828821/a-risk-prediction-model-based-on-lymph-node-metastasis-for-incorporation-into-a-treatment-algorithm-for-signet-ring-cell-type-intramucosal-gastric-cancer
#18
Jeung Hui Pyo, Cheol Min Shin, Hyuk Lee, Byung-Hoon Min, Jun Haeng Lee, Su Mi Kim, Min Gew Choi, Jun Ho Lee, Tae Sung Sohn, Jae Moon Bae, Kyung Mee Kim, Hye Seung Kim, Sin-Ho Jung, Jae J Kim, Sung Kim
OBJECTIVE: The aim of the study was to develop a reliable and easy-to-use risk-scoring system (RSS) to predict lymph-node metastasis (LNM) and determine the feasibility of endoscopic submucosal dissection for mucosa-confined signet ring cell carcinomas (SRCs). BACKGROUND: Fewer LNM and better survival rates have been reported for early gastric SRCs compared with other undifferentiated early gastric cancers (EGCs). METHODS: Data from 1544 patients with mucosa-confined SRCs were reviewed...
December 2016: Annals of Surgery
https://www.readbyqxmd.com/read/27826461/surgical-treatment-of-tubular-breast-type-ii
#19
Sergey P Galych, Oleksii Y Dabizha, Alona A Kostenko, Irina V Gomolyako, Kristina A Samko, Denys V Borovyk
BACKGROUND: Tubular breasts are caused by connective tissue malformation and occur in puberty. The main clinical characteristics of the tubular breast are breast asymmetry, dense fibrous ring around the areola, hernia bulging of the areola, megaareola, and hypoplasia of quadrants of the breast. Pathology causes great psychological discomfort to patients. METHODS: This study included 17 patients, aged 18 to 34 years, with tubular breast type II who had bilateral pathology and were treated from 2013 to 2016...
October 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/27826199/effect-of-vegf-c-sirna-and-endostatin-on-ring-formation-and-proliferation-of-esophageal-squamous-cell-carcinoma-lymphatic-endothelial-cells
#20
Yuping Zheng, Miaomiao Sun, Jinyan Chen, Lulu He, Na Zhao, Kuisheng Chen
OBJECTIVE: To study the effects of vascular endothelial growth factor C small interfering RNA and endostatin on esophageal squamous cell carcinoma-related ring formation in vitro and proliferation of lymphatic endothelial cells. MATERIALS AND METHODS: KYSE150 cells were subjected to analysis of cell transfection and endostatin operation. The groups were as follows: negative group, blank group, negative plus endostatin group, endostatin group, SG1 group, SG2 group, SG1 plus endostatin group, and SG2 plus endostatin group...
2016: OncoTargets and Therapy
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