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https://www.readbyqxmd.com/read/28435971/-mechanisms-underlying-rat-coronary-arterial-vasoconstriction-induced-by-blockade-of-inward-rectifier-potassium-channels-with-bacl2
#1
Fang-Wen Fan, Ze-Fang He, Meng Shi, Rong Yang, Xiao-Min Hou, Yu Liu, Ming-Sheng Zhang
In order to explore the mechanisms underlying the vasoconstriction induced by blockade of inward rectifier K(+) channels (Kir) with BaCl2, myogenic tone of isolated rat coronary artery (RCA) was recorded with wire myograph. The dependence of BaCl2- induced contraction on intracellular Ca(2+) ([Ca(2+)]i) release and extracellular Ca(2+) ([Ca(2+)]o) influx was studied by Ca(2+) deprivation and restoration. The mechanisms underlying BaCl2-induced RCA contraction were investigated with specific inhibitors. BaCl2 (0...
April 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28433619/lack-of-pathogenic-mutations-in-sos1-gene-in-phenytoin-induced-gingival-overgrowth-patients
#2
Katia Margiotti, Giulia Pascolini, Federica Consoli, Valentina Guida, Carlo Di Bonaventura, Anna Teresa Giallonardo, Antonio Pizzuti, Alessandro De Luca
OBJECTIVE: Gingival overgrowth is a side effect associated with some distinct classes of drugs, such as anticonvulsants, immunosuppressants, and calcium channel blockers. One of the main drugs associated with gingival overgrowth is the antiepileptic phenytoin, which affects gingival tissues by altering extracellular matrix metabolism. It has been shown that mutation of human SOS1 gene is responsible for a rare hereditary gingival fibromatosis type 1, a benign gingival overgrowth. The aim of the present study is to evaluate the possible contribution of SOS1 mutation to gingival overgrowth-related phenotype...
April 5, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28429604/intra-arterial-verapamil-post-thrombectomy-is-feasible-safe-and-neuroprotective-in-stroke
#3
Justin F Fraser, Michael Maniskas, Amanda Trout, Doug Lukins, Lindsey Parker, W Lane Stafford, Abdulnasser Alhajeri, Jill Roberts, Gregory J Bix
Large vessel ischemic stroke represents the most disabling subtype. While t-PA and endovascular thrombectomy can recanalize the occluded vessel, good clinical outcomes are not uniformly achieved. We propose that supplementing endovascular thrombectomy with superselective intra-arterial (IA) verapamil immediately following recanalization could be safe and effective. Verapamil, a calcium channel blocker, has been shown to be an effective IA adjunct in a pre-clinical mouse focal ischemia model. To demonstrate translational efficacy, mechanism, feasibility, and safety, we conducted a group of translational experiments...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28429533/impact-of-adverse-drug-events-and-treatment-satisfaction-on-patient-adherence-with-antihypertensive-medication-a-study-in-ambulatory-patients
#4
Derbew Fikadu Berhe, Katja Taxis, Flora M Haaijer-Ruskamp, Afework Mulugeta, Yewondwossen Tadesse Mengistu, Johannes G M Burgerhof, Peter G M Mol
OBJECTIVE: To evaluate the impact of adverse drug events (ADEs) and treatment satisfaction on antihypertensive medication adherence. METHODS: A cross-sectional study was conducted in six public hospitals in Ethiopia. We included adult ambulatory patients on antihypertensive medication. Adherence was measured with the 8-point Morisky Medication Adherence Scale (MMAS-8), categorized in low (0-5), medium (6-7), and high (=8) adherence. Treatment satisfaction was measured using the Treatment Satisfaction Questionnaire for Medication (TSQM) version 1...
April 21, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28425226/a-review-of-pediatric-pulmonary-hypertension-with-new-guidelines
#5
Serdar Kula, Ayhan Pektaş
This study aims to review pediatric pulmonary hypertension (PH) by comparing the guidelines of the European Society of Cardiology (ESC)/European Respiratory Society (ERS), the American Heart Association (AHA)/American Thoracic Society (ATS), and the European Pediatric Pulmonary Vascular Disease Network (EPPVDN). All three sets of guidelines define PH as having a mean pulmonary artery pressure of ≥25 mmHg and accept the validity of the World Health Organization (WHO) classification system. Every child with a high index of suspicion for PH should undergo an initial work-up of chest X-rays, electrocardiography, and echocardiography...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28423696/improvement-of-dexamethasone-sensitivity-by-chelation-of-intracellular-ca2-in-pediatric-acute-lymphoblastic-leukemia-cells-through-the-prosurvival-kinase-erk1-2-deactivation
#6
Souleymane Abdoul-Azize, Isabelle Dubus, Jean-Pierre Vannier
Previous studies have demonstrated that glucocorticoid hormones, including dexamethasone, induced alterations in intracellular calcium homeostasis in acute lymphoblastic leukemia (ALL) cells. However, the mechanism by which intracellular calcium homeostasis participates in dexamethasone sensitivity and resistance on ALL cells remains elusive. Here, we found that treatment of cells with dexamethasone resulted in increased intracellular calcium concentrations through store-operated calcium entry stimulation, which was curtailed by store-operated calcium channel blockers...
March 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28419822/inhibitory-effects-of-losartan-and-azelnidipine-on-augmentation-of-blood-pressure-variability-induced-by-angiotensin-ii-in-rats
#7
Danfeng Jiang, Yukiko Kawagoe, Kenji Kuwasako, Kazuo Kitamura, Johji Kato
Increased blood pressure variability has been shown to be associated with cardiovascular morbidity and mortality. Recently we reported that continuous infusion of angiotensin II not only elevated blood pressure level, but also increased blood pressure variability in a manner assumed to be independent of blood pressure elevation in rats. In the present study, the effects of the angiotensin type I receptor blocker losartan and the calcium channel blocker azelnidipine on angiotensin II-induced blood pressure variability were examined and compared with that of the vasodilator hydralazine in rats...
April 15, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28413969/optimizing-the-management-of-uncontrolled-hypertension-what-do-triple-fixed-dose-drug-combinations-add
#8
Costas Thomopoulos, Georgios Katsimagklis, Stefanos Archontakis, Georgios Skalis, Thomas Makris
Fixed-dose triple drug combinations represent one of the latest innovations of pharmacotherapy for hypertension (HT). They combine a traditional renin-angiotensin system blocker, a diuretic and a calcium channel blocker. The main benefit is the simplification of treatment regimen because 3 different agents are combined at different doses in a single pill. Improving adherence to treatment partly explains why this kind of combination may effectively reduce blood pressure (BP). BP lowering by a single-pill triple-drug combination can be approximately predicted, by using appropriate formulas described in previous meta-analysis of randomized trials...
April 14, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28413967/uncontrolled-hypertension-and-oncology-clinical-%C3%AE-ips
#9
Rigas G Kalaitzidis, Moses S Elisaf
Angiogenesis is fundamental for tumour development and progression. Thus, anti-angiogenic agents have been developed and are mainly vascular endothelial growth factor (VEGF) pathway inhibitors. However, these agents commonly exhibit cardiac and renal toxicity, proteinuria and hypertension (HT). In fact, with the use of anti-angiogenic agents a rapiddose-dependent increaseof blood pressure (BP) is observed. Thepossible mechanisms of VEGF inhibitors-induced HTinclude systemic endothelial dysfunction, renal impairment as well as vascular micro- and macroangiopathy...
April 14, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28413728/mechanism-of-endothelial-nitric-oxide-synthase-phosphorylation-and-activation-by-tentacle-extract-from-the-jellyfish-cyanea-capillata
#10
Beilei Wang, Dan Liu, Chao Wang, Qianqian Wang, Hui Zhang, Guoyan Liu, Xia Tao, Liming Zhang
Our previous study demonstrated that tentacle extract (TE) from the jellyfish Cyanea capillata (C. capillata) could cause a weak relaxation response mediated by nitric oxide (NO) using isolated aorta rings. However, the intracellular mechanisms of TE-induced vasodilation remain unclear. Thus, this study was conducted to examine the role of TE on Akt/eNOS/NO and Ca(2+) signaling pathways in human umbilical vein endothelial cells (HUVECs). Our results showed that TE induced dose- and time-dependent increases of eNOS activity and NO production...
2017: PeerJ
https://www.readbyqxmd.com/read/28412086/tocolysis-after-preterm-premature-rupture-of-membranes-and-neonatal-outcome-a-propensity-score-analysis
#11
Elsa Lorthe, François Goffinet, Stéphane Marret, Christophe Vayssiere, Cyril Flamant, Mathilde Quere, Valérie Benhammou, Pierre-Yves Ancel, Gilles Kayem
BACKGROUND: There are conflicting results regarding tocolysis in cases of preterm premature rupture of membranes. Delaying delivery may reduce neonatal morbidity due to prematurity, allow for prenatal corticosteroids and, if necessary, in utero transfer. However, that may increase risks of maternofetal infection and its adverse consequences. OBJECTIVE: To investigate whether tocolytic therapy in cases of preterm premature rupture of membranes is associated with improved neonatal or obstetric outcomes...
April 12, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28411897/management-of-essential-hypertension
#12
REVIEW
Keith C Ferdinand, Samar A Nasser
The treatment of essential hypertension is one of the most critical interventions to decrease cardiovascular morbidity and mortality. The prevalence of hypertension in the US varies across race/ethnicity with African Americans having the highest prevalence and overall less control among racial/ethnic minorities compared with non-Hispanic whites. Therapeutic lifestyle modifications are the bedrock of essential hypertension control, but most patients with hypertension will require pharmacotherapy, usually with multiple medications often in combination...
May 2017: Cardiology Clinics
https://www.readbyqxmd.com/read/28409546/clinical-correlation-with-failure-of-endovenous-therapy-for-leg-swelling
#13
Ahmad Alsheekh, Anil Hingorani, Natalie Marks, Yuriy Ostrozhynskyy, Enrico Ascher
Background The development and use of minimally invasive procedures provide improved options for the management of symptoms of chronic venous insufficiency. While many patients with iliac venous occlusive disease and superficial venous insufficiency improve with combined iliac venous stenting and correction of superficial venous reflux, some patients have symptoms which persist. The goal of this study was to identify clinical factors related to persistent symptoms in patients with leg swelling after treatment of both iliac vein stenting and thermal ablation...
January 1, 2017: Vascular
https://www.readbyqxmd.com/read/28407303/rifampicin-reverses-nicardipine-effect-inducing-uncontrolled-essential-hypertension
#14
Elena-Mihaela Cordeanu, Sébastien Gaertner, Alix Faller, Corina Mirea, Jean-Marc Lessinger, Veronique Kemmel, Dominique Stephan
Dihydropyridine calcium-channel blockers are a known substrate for the cytochrome P450 isoform 3A4. Rifampicin, an antitubercular agent, is one of the most potent inducers of hepatic and intestinal CYP3A4 thus increasing dihydropyridine metabolism. We report a case of a 67-year-old hypertensive female treated with a 4-drug antihypertensive regimen including a dihydropyridine (nicardipine 50mg bid), who was admitted for septic arthritis of the knee requiring antibiotic treatment with teicoplanin 400mg od and rifampicin 600mg bid...
April 13, 2017: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/28404666/cardiovascular-medication-and-intraocular-pressure-results-from-the-gutenberg-health-study
#15
René Höhn, Alireza Mirshahi, Stefan Nickels, Andreas Schulz, Philipp S Wild, Maria Blettner, Norbert Pfeiffer
BACKGROUND: Intraocular pressure (IOP) is well known to be associated with blood pressure and other cardiovascular risk factors. The influence of systemic cardiovascular, in particular antihypertensive, medication on IOP is still controversial. This study analyses the association between the use of cardiovascular medications and IOP in a large European cohort. METHODS: The Gutenberg Health Study is a population-based, prospective,observational cohort study in mid-western Germany...
April 12, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28400197/cutaneous-penetration-enhancing-effect-of-menthol-calcium-involvement
#16
Amit Joshi, Abhay Joshi, Hiren Patel, Dovenia Ponnoth, Grazia Stagni
Menthol is a naturally occurring terpene used as a penetration enhancer in topical and transdermal formulations. Literature shows a growing interest on menthol's interactions with the Transient-Receptor-Potential (TRPM-8) calcium channel. A decrease in extracellular Ca(+2) due to the activation of TRPM-8 channels produces inhibition of E-cadherin expression that is responsible for cell-cell adhesion. Since calcium is present in the entire epidermis, the purpose of this study is to evaluate whether the aforementioned properties of menthol are also related to its penetration-enhancing-effects...
April 8, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28399450/synthesis-of-new-n3-substituted-dihydropyrimidine-derivatives-as-l-t-type-calcium-channel-blockers
#17
Mohamed Teleb, Fang-Xiong Zhang, Ahmed M Farghaly, Omaima M Aboul Wafa, Frank R Fronczek, Gerald W Zamponi, Hesham Fahmy
Cardiovascular diseases (CVDs) are the main cause of deaths worldwide. Up-to-date, hypertension is the most significant contributing factor to CVDs. Recent clinical studies recommend calcium channel blockers (CCBs) as effective treatment alone or in combination with other medications. Being the most clinically useful CCBs, 1,4-dihydropyridines (DHPs) attracted great interest in improving potency and selectivity. However, the short plasma half-life which may be attributed to the metabolic oxidation to the pyridine-counterparts is considered as a major limitation for this class...
April 3, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28396143/lethal-effects-of-an-insecticidal-spider-venom-peptide-involve-positive-allosteric-modulation-of-insect-nicotinic-acetylcholine-receptors
#18
Monique J Windley, Irina Vetter, Richard J Lewis, Graham M Nicholson
κ-Hexatoxins (κ-HXTXs) are a family of excitotoxic insect-selective neurotoxins from Australian funnel-web spiders that are lethal to a wide range of insects, but display no toxicity towards vertebrates. The prototypic κ-HXTX-Hv1c selectively blocks native and expressed cockroach large-conductance calcium-activated potassium (BKCa or KCa1.1) channels, but not their mammalian orthologs. Despite this potent and selective action on insect KCa1.1 channels, we found that the classical KCa1.1 blockers paxilline, charybdotoxin and iberiotoxin, which all block insect KCa1...
April 8, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28395781/pharmacological-secondary-prevention-in-patients-with-mesenterial-artery-atherosclerosis-and-arterial-embolism
#19
REVIEW
Anders Gottsäter
Visceral arteries such as the coeliac (CA), superior mesenteric (SMA), and the inferior mesenteric artery (IMA) might be affected by atherosclerotic occlusive lesions with or without thrombosis or embolization causing ischaemic symptoms from the gastrointestinal tract. After treatment of an acute event, these patients should be offered both non-pharmacological and pharmacological secondary prevention to reduce risk for future ischaemic arterial manifestations. Patients with mesenteric ischaemia caused by atherosclerosis should be evaluated concerning platelet antiaggregation with low dose aspirin or clopidogrel, and those with cardioembolic disease should be recommended anticoagulant treatment with either warfarin or one of the direct oral anticoagulants (DOAC; apixaban, dabigatran, edoxaban, or rivaroxaban)...
February 2017: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/28392759/calcium-dependent-and-synapsin-dependent-pathways-for-the-presynaptic-actions-of-bdnf
#20
Qing Cheng, Sang-Ho Song, George J Augustine
We used cultured hippocampal neurons to determine the signaling pathways mediating brain-derived neurotrophic factor (BDNF) regulation of spontaneous glutamate and GABA release. BDNF treatment elevated calcium concentration in presynaptic terminals; this calcium signal reached a peak within 1 min and declined in the sustained presence of BDNF. This BDNF-induced transient rise in presynaptic calcium was reduced by SKF96365, indicating that BDNF causes presynaptic calcium influx via TRPC channels. BDNF treatment increased the frequency of miniature excitatory postsynaptic currents (mEPSCs)...
2017: Frontiers in Cellular Neuroscience
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