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https://www.readbyqxmd.com/read/29782857/quaternary-ammonium-salt-of-u50-488h-elicits-protective-effects-against-hypoxic-pulmonary-hypertension
#1
Yaguang Zhou, Xin Tian, Xueying Wang, Yuanbo Wang, Rong Fan, Yuemin Wang, Na Feng, Shumiao Zhang, Haitao Guo, Xiaoming Gu, Min Jia, Wen Yin, Zuoxu Hou, Juan Li, Jianming Pei
The present study aimed to investigate the role of quaternary ammonium salt of U50,488H (Q-U50,488H) in hypoxic pulmonary hypertension (HPH) and underlying mechanisms involved. A HPH animal model was established in rats under hypoxia and the mean pulmonary arterial pressure (mPAP) and right ventricular pressure (RVP) were measured. Relaxation of the pulmonary artery in response to Q-U50,488H was determined. In addition, expression and activity of endothelial nitric oxide (NO) synthase (eNOS) and inducible NO synthase (iNOS) with NO content, Akt expression, total antioxidant capacity (T-AOC), and gp91phox were evaluated...
May 18, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29778449/mechanisms-underlying-the-relaxation-by-a484954-a-eukaryotic-elongation-factor-2-kinase-inhibitor-in-rat-isolated-mesenteric-artery
#2
Tomoko Kodama, Muneyoshi Okada, Hideyuki Yamawaki
Eukaryotic elongation factor 2 kinase (eEF2K) is a calmodulin-related protein kinase which regulates protein translation. A484954 is an inhibitor of eEF2K. In the present study, we investigated the acute effects of A484954 on contractility of isolated blood vessels. Isometric contraction of rat isolated aorta and main branch of superior mesenteric artery (MA) was measured. Expression of an inward rectifier K+ (Kir ) channel subtype mRNA and protein was examined. A484954 caused relaxation in endothelium-intact [E (+)] and -denuded [E (-)] aorta or MA precontracted with noradrenaline (NA)...
May 2, 2018: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/29777058/gpr40-is-a-low-affinity-epoxyeicosatrienoic-acid-receptor-in-vascular-cells
#3
Sang Kyu Park, Anja Herrnreiter, Sandra L Pfister, Kathryn M Gauthier, Benjamin A Falck, John R Falck, William B Campbell
Endothelium-derived epoxyeicosatrienoic acids (EETs) have numerous vascular activities mediated by G protein--coupled receptors. Long-chain free fatty acids and EETs activate GPR40, prompting us to investigate the role of GPR40 in some vascular EET activities. 14,15-EET, 11,12-EET, arachidonic acid, and the GPR40 agonist GW9508 increase intracellular calcium concentrations in human GPR40-overexpressing HEK293 cells (EC50 = 0.58 ± 0.08 μM, 0.91 ± 0.08 μM, 3.9 ± 0.06 μM and 19 ± 0.37 nM, respectively)...
May 18, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29776873/effects-of-reflexology-and-progressive-muscle-relaxation-on-pain-fatigue-and-quality-of-life-during-chemotherapy-in-gynecologic-cancer-patients
#4
Hacer Alan Dikmen, Fusun Terzioglu
Our aim was to investigate the effect of reflexology and progressive muscle relaxation (PMR) exercises on pain, fatigue, and quality of life (QoL) of gynecologic cancer patients during chemotherapy. Eighty participants were randomly assigned to one of four groups: reflexology, progressive muscle relaxation (PMR) exercises, both (reflexology + PMR), or a control group. Data were collected with a general data collection form, Brief Pain and Fatigue inventories, and Multidimensional Quality-of-Life Scale-Cancer...
May 15, 2018: Pain Management Nursing: Official Journal of the American Society of Pain Management Nurses
https://www.readbyqxmd.com/read/29773582/activation-of-large-conductance-calcium-activated-k-channels-by-nitric-oxide-mediates-apelin-induced-relaxation-of-coronary-arteries
#5
Amreen Mughal, Chengwen Sun, Stephen T O'Rourke
Apelin increases coronary blood flow, cardiac contractility and cardiac output. Based on these favorable hemodynamic effects, apelin and apelin-like analogs are being developed for treating heart failure and related disorders; however, the molecular mechanisms underlying apelin-induced coronary vasodilation are unknown. This study aimed to elucidate the signaling pathways by which apelin causes smooth muscle relaxation in coronary arteries. Receptors for apelin (APJ receptors) were expressed in coronary arteries, as determined by Western blot and PCR analyses...
May 17, 2018: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29772498/test-retest-reliability-of-laser-displacement-mechanomyography-in-paraspinal-muscles-while-in-lumbar-extension-or-flexion
#6
Christian Than, Laura Seidl, Danijel Tosovic, J Mark Brown
This study investigated test-retest reliability of mechanomyography (MMG) on lumbar paraspinal muscles. Healthy male and female subjects (mean ± standard deviation, 25 ± 9.4 years, BMI 21.8 ± 2.99, n = 34) were recruited. Two test sessions (one week apart) consisted of MMG (laser displacement sensor (LDS)) muscle evaluations over the 10 lumbar facet joints, and 2 bilateral sacral sites, in anatomical extension and flexion. Two-way repeated measures ANOVA with Tukey's post hoc showed no significant differences between testing sessions for the same position (p > 0...
May 12, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29772297/pharmacokinetic-profile-and-oral-bioavailability-of-kaurenoic-acid-from-copaifera-spp-in-rats
#7
Dalyara Mendonça de Matos, Milainy Rocha Viana, Marcela Cristina de Oliveira Alvim, Lara Soares Aleixo de Carvalho, Laura Hora Rios Leite, Ademar Alves da Silva Filho, Jorge Willian Leandro Nascimento
Kaurenoic acid (KA) is a kaurane diterpene found in several medicinal plants that displays biological activities, such as anti-inflammatory, smooth muscle relaxant and hypotensive response. However, there are no pharmacokinetic data available about this molecule. The purpose of the study was to determine the pharmacokinetics profile and the oral bioavailability of KA in rats. Wistar rats submitted to jugular vein cannulation received 50 mg/kg of KA by intravenous or oral route. The implanted cannula allowed intravenous administration and serial blood collection along 10 h...
May 14, 2018: Fitoterapia
https://www.readbyqxmd.com/read/29770120/multiparametric-analysis-of-sniff-nasal-inspiratory-pressure-test-in-middle-stage-amyotrophic-lateral-sclerosis
#8
Antonio Sarmento, Andrea Aliverti, Layana Marques, Francesca Pennati, Mario Emílio Dourado-Júnior, Guilherme Fregonezi, Vanessa Resqueti
The relaxation rates and contractile properties of inspiratory muscles are altered with inspiratory muscle weakness and fatigue. This fact plays an important role in neuromuscular disorders patients and had never been extensively studied in amyotrophic lateral sclerosis (ALS). In this cross-sectional study, these parameters were investigated non-invasively through nasal inspiratory sniff pressure test (SNIP) in 39 middle stage spinal onset ALS subjects and compared with 39 healthy controls. ALS patients were also divided into three subgroups according to a decline in their percentage of predicted forced vital capacity (FVC%pred ) as well as a decline in the ALS functional rating scale score and its respiratory subscore (R-subscore) in order to determine the best parameter linked to early respiratory muscle weakness...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29767451/feline-ureteral-obstructions-part-1-medical-management
#9
REVIEW
D L Clarke
Feline ureteral obstructions are an increasingly recognised and challenging diagnostic and management problem. Many cats with ureteral obstructions are critically ill at the time of diagnosis, especially if there is dysfunction of the contralateral kidney. They may present with varying severities of acute kidney injury, electrolyte disturbances, and may have comorbidities such as heart disease that complicate perioperative and long-term management. Medical management, which may consist of rehydration and restoration of intravascular volume with intravenous fluid therapy, osmotic diuresis, ureteral muscle relaxation, and antimicrobials for infection, is important in feline ureteral obstruction patients...
May 16, 2018: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/29765891/botulinum-toxin-injection-in-the-treatment-of-postextubation-dysphagia-a-case-report
#10
Byung Wook Kim, Hee-Ju Kim, Jung Keun Hyun, Seo Young Kim, Tae Uk Kim
Prolonged intubation is known to bring on postextubation dysphagia (PED) in some patients. We have noted that there were some studies to investigate specific type and pattern of PED, which showed large variety of different swallowing abnormalities as mechanisms of PED that are multifactorial. There are several options of treatment in accordance with the management of these abnormalities. A botulinum toxin (BoT) injection into the upper esophageal sphincter (UES) can improve swallowing functions for patients with this disorder, by working to help the muscle relax...
April 2018: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29765214/tiotropium-inhibits-methacholine-induced-extracellular-matrix-production-via-%C3%AE-catenin-signaling-in-human-airway-smooth-muscle-cells
#11
Yating Huo, Lili Guan, Jiawen Xu, Luqian Zhou, Rongchang Chen
Background: Airway remodeling is an important feature of chronic obstructive pulmonary disease (COPD) that is associated with disease severity and irreversible airflow limitation. An extensive alteration of the extracellular matrix (ECM) surrounding the airway smooth muscle (ASM) bundle is one of the pathological manifestations of airway remodeling, which contributes to the decline in lung function. Tiotropium, a long-acting inhaled muscarinic receptor antagonist, has been confirmed to play a role in preventing airway remodeling including ECM deposition beyond bronchodilation in vivo, but the relationship between ASM cell (ASMC) relaxation and ECM production remains unclear...
2018: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29759909/the-predictive-value-of-arteriogenic-erectile-dysfunction-for-coronary-artery-disease-in-men
#12
Sherif Salah Azab, Hossam El Din Hosni, Taha A El Far, Nashaat Nabil Ismail, Yasser K El Bakdady, Ahmed F Mohamed
BACKGROUND: Erectile dysfunction (ED) is assumed to be connected with vascular disease caused by endothelial dysfunction, and characterized by the incapability of the smooth muscle cells lining the arterioles to relax, therefore, inhibit vasodilatation. AIM: To assess the predictive value of arteriogenic ED for coronary artery disease in men above the age of 40 years. METHODS: 75 Patients reporting arteriogenic ED and 25 men with normal erectile function were enrolled in the study...
May 11, 2018: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29756747/common-controversies-surrounding-anesthesia-for-procedures-in-the-interventional-pulmonology-suite
#13
Srikantha L Rao, Niraja Rajan
The number of anesthetics for both simple diagnostic and complex therapeutic procedures being performed in non-operating room locations (NORA) in dedicated Interventional Pulmonology Suites have been increasing in the past few years. Anesthesiologists must be familiar with the demands necessitated by the procedures performed by the interventionists and tailor the anesthetic to create a still field while carefully considering the patient's altered pharmacokinetics and reduced cardiopulmonary function and choose a technique that allows prompt recovery and early discharge in these patients, many of whom are elderly and frail...
May 14, 2018: Minerva Anestesiologica
https://www.readbyqxmd.com/read/29756656/pathophysiology-and-treatment-of-achalasia-in-a-muscle-mechanical-perspective
#14
REVIEW
Hans Gregersen, Kar Man Lo
This review provides a biomechanical perspective on the pathophysiology and treatment of achalasia. The esophagus is efficient in transporting ingested material to the stomach in healthy subjects. A fine balance exists between the peristaltic forces generated in the esophageal body (which herein is defined as the preload) and the resistance in the outlet, the esophago-gastric junction (which is defined as the afterload). Achalasia is a rare esophageal disease that progressively over many years challenges esophageal efficacy...
May 14, 2018: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/29756630/a-biomimetic-microfluidic-model-to-study-signalling-between-endothelial-and-vascular-smooth-muscle-cells-under-hemodynamic-conditions
#15
Nicole C A van Engeland, Andreas M A O Pollet, Jaap M J den Toonder, Carlijn V C Bouten, Oscar M J A Stassen, Cecilia M Sahlgren
Cell signalling and mechanics influence vascular pathophysiology and there is an increasing demand for in vitro model systems that enable examination of signalling between vascular cells under hemodynamic conditions. Current 3D vessel wall constructs do not recapitulate the mechanical conditions of the native tissue nor do they allow examination of cell-cell interactions under relevant hemodynamic conditions. Here, we describe a 3D microfluidic chip model of arterial endothelial and smooth muscle cells where cellular organization, composition and interactions, as well as the mechanical environment of the arterial wall are mimicked...
May 14, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29755629/interventricular-vessel-of-the-heart
#16
Pekka J Kuusela
The communication from right to left through the interventricular septum of the heart became identified by the anatomical study for 4 years. One thousand nine hundred years ago, Galen stated that blood seeps through the perforations in the interventricular septum of the heart. However, William Harvey, working 400 years ago, failed to find any. The interventricular vessel is a slit between the fibers of the muscle feasible to be patent by relaxing and widening of the helical heart at the right atrial filling phase at the end of the diastole...
April 2018: Cardiology Research
https://www.readbyqxmd.com/read/29753800/effect-of-sexual-intercourse-on-lower-extremity-muscle-force-in-strength-trained-men
#17
Leah M Valenti, Claudia Suchil, Gabriel Beltran, Roman C Rogers, Emily A Massey, Todd A Astorino
BACKGROUND: Sex has been deemed taboo for athletic performance going back to ancient Rome and Greece, as the act of sex was thought to promote ease and a sense of relaxation. AIM: This study examined the effect of sexual intercourse completed 12 hours before a bout of isokinetic dynamometry on muscle force production in strength-trained men. METHODS: 12 Healthy physically active men (age = 25.6 ± 3.8 years) who were sexually active participated in this study...
May 9, 2018: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29753043/ska-31-an-activator-of-endothelial-ca-2-activated-k-channels-evokes-robust-vasodilation-in-rat-mesenteric-arteries
#18
Rayan Khaddaj-Mallat, Cini Mathew John, Andrew P Braun
It is now well recognized that endothelial KCa2.3 and KCa3.1 channel activities contribute to dilation of resistance arteries via endothelium-mediated hyperpolarization and vascular smooth muscle relaxation. In this study, we have investigated the functional effect of the KCa channel activator SKA-31 in third order rat mesenteric arteries using arterial pressure myography. Isolated arteries were cannulated, pressurized intraluminally to 70mmHg at 36°C and then constricted with 1μM phenylephrine. Acute bath exposure to SKA-31 evoked a robust and reversible inhibition of developed tone (IC50 = 0...
May 9, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29748208/relationship-between-cough-associated-changes-in-csf-flow-and-disease-severity-in-chiari-i-malformation-an-exploratory-study-using-real-time-mri
#19
A F Bezuidenhout, D Khatami, C B Heilman, E M Kasper, S Patz, N Madan, Y Zhao, R A Bhadelia
BACKGROUND AND PURPOSE: Currently no quantitative objective test exists to determine disease severity in a patient with Chiari I malformation. Our aim was to correlate disease severity in symptomatic patients with Chiari I malformation with cough-associated changes in CSF flow as measured with real-time MR imaging. MATERIALS AND METHODS: Thirteen symptomatic patients with Chiari I malformation (tonsillar herniation of ≥5 mm) were prospectively studied. A real-time, flow-sensitized pencil-beam MR imaging scan was used to measure CSF stroke volume during rest and immediately following coughing and relaxation periods (total scan time, 90 seconds)...
May 10, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29747754/mechanism-of-resveratrol-induced-relaxation-of-the-guinea-pig-fundus
#20
Ching-Chung Tsai, Shu-Leei Tey, Ming-Che Lee, Ching-Wen Liu, Yu-Tsun Su, Shih-Che Huang
BACKGROUND: Resveratrol is a polyphenolic compound that can be isolated from plants and also is a constituent of red wine. Resveratrol induces relaxation of vascular smooth muscle and may prevent cardiovascular diseases. PURPOSE: Impaired gastric accommodation plays an important role in functional dyspepsia and fundic relaxation and is a therapeutic target of functional dyspepsia. Although drugs for fundic relaxation have been developed, these types of drugs are still rare...
April 1, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
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