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https://www.readbyqxmd.com/read/28324033/effect-of-moxonidine-on-the-aldosterone-renin-ratio-in-healthy-male-volunteers
#1
Ashraf H Ahmed, Richard D Gordon, Gregory Ward, Martin Wolley, Brett C McWhinney, Jacobus P Ungerer, Michael Stowasser
Background: The most popular screening test for primary aldosteronism (PA) is the plasma aldosterone/ renin ratio (ARR). Medications, dietary sodium, posture and time of day all affect renin and aldosterone levels, and can result in false negative or positive ARRs if not controlled. Most antihypertensive medications affect the ARR and can interfere with interpretation of results. To our knowledge, no study has been undertaken to evaluate the effects of moxonidine on the ARR. Methods: Normotensive, non-medicated male volunteers (n=20) underwent measurement (seated, midmorning) of plasma aldosterone (by HPLC-tandem mass spectrometry), direct renin concentration (DRC), renin activity (PRA), cortisol, electrolytes and creatinine and urinary aldosterone, cortisol, electrolytes and creatinine at baseline, and after one week of moxonidine at 0...
March 16, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28290898/-renoprotecion-with-metabolic-syndrome-the-possibility-of-receptor-agonist-imidazoline-moxonidine
#2
O D Ostroumova, A A Zykova
The article is devoted to the of prevalence, diagnosis, and prognostic significance of renal damage in metabolic syndrome. The pathogenetic mechanisms of development and progression of chronic kidney disease in individuals with obesity, including the role of increased activity of the sympathetic nervous system is discussed. Approaches to the choice of antihypertensive drugs with an emphasis on metabolic and renal protection properties are given. The advantages of imidazoline receptors in neuroprotective of moxonidine in patients with arterial hypertension, metabolic syndrome, and diabetes mellitus is discussed in detail...
October 2016: Kardiologiia
https://www.readbyqxmd.com/read/28290862/-the-effectiveness-of-combination-antihypertensive-therapy-in-women-with-hypothyroidism-and-the-metabolic-syndrome
#3
V V Skibitsky, A V Fendrikova, N E Pyhalova, D V Sirotenko
PURPOSE OF THE STUDY: Evaluating the effectiveness of the various options of combination antihypertensive therapy (AHT) in women with arterial hypertension (AH) and metabolic syndrome (MS) and hypothyroidism. MATERIAL AND METHODS: The study included 163 women with hypertension, metabolic syndrome, and hypothyroidism, the median age of 53.5 (48-60) years; in 73 (44.8%) women were diagnosed with subclinical hypothyroidism (SH), 90 (55.2%) - overt hypothyroidism (OH)...
September 2016: Kardiologiia
https://www.readbyqxmd.com/read/28276870/renal-sympathetic-denervation-for-treatment-of-patients-with-heart-failure-summary-of-the-available-evidence
#4
Wail Nammas, Juhani Koistinen, Tuomas Paana, Pasi P Karjalainen
Heart failure syndrome results from compensatory mechanisms that operate to restore - back to normal - the systemic perfusion pressure. Sympathetic overactivity plays a pivotal role in heart failure; norepinephrine contributes to maintenance of the systemic blood pressure and increasing preload. Cardiac norepinephrine spillover increases in patients with heart failure; norepinephrine exerts direct toxicity on cardiac myocytes resulting in a decrease of synthetic activity and/or viability. Importantly, cardiac norepinephrine spillover is a powerful predictor of mortality in patients with moderate to severe HF...
February 10, 2017: Annals of Medicine
https://www.readbyqxmd.com/read/28104456/rapid-stimulation-of-sodium-intake-combining-aldosterone-into-the-4th-ventricle-and-the-blockade-of-the-lateral-parabrachial-nucleus
#5
S Gasparini, M R Melo, G F Leite, P A Nascimento, G M F Andrade-Franzé, J V Menani, E Colombari
Chronic infusion of aldosterone into the 4th ventricle (4th V) induces robust daily sodium intake, whereas acute injection of aldosterone into the 4th V produces no sodium intake. The inhibitory mechanism of the lateral parabrachial nucleus (LPBN) restrains sodium intake induced by different natriorexigenic stimuli and might affect the acute response to aldosterone into the 4th V. In the present study, 1.8% NaCl and water intake was tested in rats treated with acute injections of aldosterone into the 4th V combined with the blockade of the inhibitory mechanisms with injections of moxonidine (α2 adrenergic/imidazoline agonist) or methysergide (a serotonergic antagonist) into the LPBN...
January 16, 2017: Neuroscience
https://www.readbyqxmd.com/read/27895591/comparison-in-conscious-rabbits-of-the-baroreceptor-heart-rate-reflex-effects-of-chronic-treatment-with-rilmenidine-moxonidine-and-clonidine
#6
Monique L Parkin, Kyungjoon Lim, Sandra L Burke, Geoffrey A Head
We investigated the effects of chronic subcutaneous treatment with centrally-acting antihypertensive agents moxonidine, rilmenidine, and clonidine on the baroreflex control of heart rate (HR) in conscious normotensive rabbits over 3 weeks. Infusions of phenylephrine and nitroprusside were performed at week 0 and at weeks 1 and 3 of treatment to determine mean arterial pressure (MAP)-HR baroreflex relationships. A second curve was performed after intravenous methscopolamine to determine the sympathetic baroreflex relationship...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27873165/analysing-the-effect-of-i1-imidazoline-receptor-ligands-on-dss-induced-acute-colitis-in-mice
#7
Ágnes Fehér, Viktória E Tóth, Mahmoud Al-Khrasani, Mihály Balogh, Bernadette Lázár, Zsuzsanna Helyes, Klára Gyires, Zoltán S Zádori
Imidazoline receptors (IRs) have been recognized as promising targets in the treatment of numerous diseases; and moxonidine and rilmenidine, agonists of I1-IRs, are widely used as antihypertensive agents. Some evidence suggests that IR ligands may induce anti-inflammatory effects acting on I1-IRs or other molecular targets, which could be beneficial in patients with inflammatory bowel disease (IBD). On the other hand, several IR ligands may stimulate also alpha2-adrenoceptors, which were earlier shown to inhibit, but in more recent studies to rather aggravate colitis...
February 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/27847672/development-of-hydrophilic-interaction-liquid-chromatography-method-for-the-analysis-of-moxonidine-and-its-impurities
#8
Slavica Filipic, Milica Elek, Marija Popović, Katarina Nikolic, Danica Agbaba
Fast and simple hydrophilic interaction liquid chromatography (HILIC) method was developed and validated for the analysis of moxonidine and its four impurities (A, B, C, and D) in pharmaceutical dosage form. All experiments were performed on the Agilent Technologies 1200 high-performance liquid chromatography (HPLC) system using Zorbax RX-SIL, 250 mm × 4.6 mm, 5 μm column as stationary phase (T = 25°C, F = 1 mL/min, and λ = 255 nm), and mixture of acetonitrile and 40 mM ammonium formate buffer (pH 2...
2016: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/27776558/characterization-and-history-of-arterial-hypertension-leading-to-inpatient-treatment
#9
Carsten P Bramlage, Mina Nasiri-Sarvi, Joan Minguet, Peter Bramlage, Gerhard Anton Müller
BACKGROUND AND AIMS: Arterial hypertension is a major cause of death worldwide. For the most part, treatment for hypertension can be performed on an outpatient basis. However, some patients also require inpatient treatment, and the contributing factors for this remain unknown. Therefore, the primary objective of the present study was to determine which patient characteristics are associated with inpatient treatment for arterial hypertension. METHODS: Here, we conducted a mono-centric study of 103 hypertensive subjects, who were treated as inpatients in the Department of Nephrology and rheumatology of the university medical faculty of Göttingen...
October 24, 2016: BMC Research Notes
https://www.readbyqxmd.com/read/27754015/br-04-1management-of-treatment-resistant-hypertension
#10
David John Webb
Treatment-resistant hypertension (TRH) is defined as the failure to achieve an office BP target of <140/90 mmHg (<130/80 mmHg in patients with chronic kidney disease (CKD) or diabetes) in patients with hypertension (HT), despite adherence to at least 3 antihypertensive medications at optimal tolerated doses, ideally including a diuretic (Calhoun et al., Circulation 2008). TRH identifies patients with hard-to-treat HT, who might benefit from specialist investigation and treatment. Although some studies put the prevalence of TRH as >10%, these levels may be inflated by white-coat hypertension and poor adherence...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27727749/comparative-evaluation-of-therapeutic-effect-of-moxonidine-versus-amlodipine-on-blood-pressure-in-obese-hypertensives
#11
Suraj Kumar, Maninder Kansal, Sumit Kumar, Abhishek Goyal
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27565220/pharmacological-analysis-of-the-cardiac-sympatho-inhibitory-actions-of-moxonidine-and-agmatine-in-pithed-spontaneously-hypertensive-rats
#12
Luis E Cobos-Puc, Araceli Sánchez-López, David Centurión
This study shows that in spontaneously hypertensive rats (SHR) of 14-weeks-old, the sympathetically-induced, but not noradrenaline-induced tachycardic response are higher than age-matched Wistar normotensive rats. Furthermore, in SHR the sympathetically-induced tachycardic response was: (1) unaffected by moxonidine (3μg/kgmin); (2) partially inhibited by B-HT 933 (30μg/kgmin), both at the lowest doses; and (3) completely inhibited by the highest doses of B-HT 933 (100μg/kgmin), moxonidine (10μg/kgmin) or agmatine (1000 and 3000μg/kgmin) while the noradrenaline-induced tachycardic responses remained unaffected by the above compounds, except by 3000μg/kgmin agmatine...
November 15, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27544874/lateral-parabrachial-nucleus-and-opioid-mechanisms-of-the-central-nucleus-of-the-amygdala-in-the-control-of-sodium-intake
#13
Gláucia M F Andrade-Franzé, Silvia Gasparini, Laurival A De Luca, Patrícia M De Paula, Débora S A Colombari, Eduardo Colombari, Carina A F Andrade, José V Menani
Facilitatory and inhibitory mechanisms in the central nucleus of the amygdala (CeA) and the lateral parabrachial nucleus (LPBN), respectively, are important for the control of sodium and water intake. Here we investigated the importance of the opioid mechanisms in the CeA for water and 0.3M NaCl intake in euhydrated or hyperosmotic rats treated with injections of muscimol (GABAA agonist) or moxonidine (α2 adrenergic/imidazoline agonist) into the LPBN, respectively. Male Holtzman rats (n=4-8/group) with stainless steel cannulas implanted bilaterally in the CeA and in the LPBN were used...
January 1, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/27524972/how-do-antihypertensive-drugs-work-insights-from-studies-of-the-renal-regulation-of-arterial-blood-pressure
#14
REVIEW
Holly Digne-Malcolm, Matthew C Frise, Keith L Dorrington
Though antihypertensive drugs have been in use for many decades, the mechanisms by which they act chronically to reduce blood pressure remain unclear. Over long periods, mean arterial blood pressure must match the perfusion pressure necessary for the kidney to achieve its role in eliminating the daily intake of salt and water. It follows that the kidney is the most likely target for the action of most effective antihypertensive agents used chronically in clinical practice today. Here we review the long-term renal actions of antihypertensive agents in human studies and find three different mechanisms of action for the drugs investigated...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27508656/-op-1a-09-the-relationship-between-the-aggression-level-of-patients-with-arterial-hypertension-and-the-antihypertensive-drug-effectiveness
#15
G Andreeva, V Gorbunov, V Beloliperskaya, S Kukushkin, E Zvolinskaya, O Lerman
OBJECTIVE: The aim of study was to define relationships between psychological traits of patients with arterial hypertension (AH) and the antihypertensive drug effectiveness.(Figure is included in full-text article.) DESIGN AND METHOD: : We analyzed ambulatory blood pressure monitoring (ABPM) data of 275 patients with AH without serious concomitant diseases We used data base of several studies with the same design: 1) the washout period duration - 1-2 weeks; 2) initial ABPM session (SpaceLabs 90207) before treatment; 3) treatment with standard therapeutic doses (amlodipin, diltiazem, metoprolol, betaxolol, enalapril, moxonidin, lisinopril) with the addition of diuretic if needed; 4) psychological status assessment was performed by the psychological questionnaire "Minnesota Multiphase Personality Inventory"(MMPI) before and at the end of the treatment...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27306670/%C3%AE-1-and-%C3%AE-2-adrenergic-receptors-in-the-retrotrapezoid-nucleus-differentially-regulate-breathing-in-anesthetized-adult-rats
#16
Luiz M Oliveira, Thiago S Moreira, Fu-Shan Kuo, Daniel K Mulkey, Ana C Takakura
Norepinephrine (NE) is a potent modulator of breathing that can increase/decrease respiratory activity by α1-/α2-adrenergic receptor (AR) activation, respectively. The retrotrapezoid nucleus (RTN) is known to contribute to central chemoreception, inspiration, and active expiration. Here we investigate the sources of catecholaminergic inputs to the RTN and identify respiratory effects produced by activation of ARs in this region. By injecting the retrograde tracer Fluoro-Gold into the RTN, we identified back-labeled catecholaminergic neurons in the A7 region...
September 1, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27302941/inhibitory-effects-of-imidazoline-receptor-ligands-on-basal-and-kainic-acid-induced-neurotoxic-signalling-in-mice
#17
Benjamin Keller, Jesús A García-Sevilla
This in vivo study assessed the potential of the imidazoline receptor (IR) ligands moxonidine (selective I1-IR), BU224 (selective I2-IR) and LSL61122 (mixed I1/I2-IR) to dampen excitotoxic signalling induced by kainic acid (KA; 45 mg/kg) in the mouse brain (hippocampus and cerebral cortex). KA triggered a strong behavioural syndrome (seizures; maximal at 60-90 minutes) and sustained stimulation (at 72 hours with otherwise normal mouse behaviour) of pro-apoptotic c-Jun-N-terminal kinases (JNK) and calpain with increased cleavage of p35 into neurotoxic p25 (cyclin-dependent kinase 5 [Cdk5] activators) in mouse hippocampus...
September 2016: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/27282217/importance-of-the-lateral-parabrachial-nucleus-to-sodium-balance-in-fluid-depleted-rats
#18
K A Cabral, C A F Andrade
The lateral parabrachial nucleus (LPBN) exerts an important inhibitory influence for the control of sodium and water intake. However, the importance of LPBN on renal responses and cardiovascular changes during extracellular dehydration are still unknown. Here we investigated the effects of bilateral injections of moxonidine (alpha2-adrenergic and imidazoline receptor agonist) on renal and cardiovascular changes in fluid-depleted rats. Male Wistar rats (n=4-8 per group) with bilateral stainless steel guide-cannulas implanted into the LPBN were treated with subcutaneous furosemide (10mg/kg)+captopril (5mg/kg) to induce fluid depletion...
October 2016: Neuroscience Research
https://www.readbyqxmd.com/read/27138707/cystathionine-%C3%AE-lyase-derived-hydrogen-sulfide-mediates-the-cardiovascular-protective-effects-of-moxonidine-in-diabetic-rats
#19
Shaimaa S El-Sayed, Mohamed N M Zakaria, Rasha H Abdel-Ghany, Abdel A Abdel-Rahman
Blunted cystathionine-γ lyase (CSE) activity (reduced endogenous H2S-level) is implicated in hypertension and myocardial dysfunction in diabetes. Here, we tested the hypothesis that CSE derived H2S mediates the cardiovascular protection conferred by the imidazoline I1 receptor agonist moxonidine in a diabetic rat model. We utilized streptozotocin (STZ; 55mg/kg i.p) to induce diabetes in male Wistar rats. Four weeks later, STZ-treated rats received vehicle, moxonidine (2 or 6mg/kg; gavage), CSE inhibitor DL-propargylglycine, (37...
July 15, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27112661/%C3%AE-2a-adrenoceptors-but-not-nitric-oxide-mediate-the-peripheral-cardiac-sympatho-inhibition-of-moxonidine
#20
Luis E Cobos-Puc, Hilda Aguayo-Morales, Yesenia Silva-Belmares, Maria A González-Zavala, David Centurión
Moxonidine centrally inhibits the sympathetic activity through the I1-imidazoline receptor and nitric oxide. In addition, inhibits the peripheral cardiac sympathetic outflow by α2-adrenoceptors/I1-imidazoline receptors, although the role of α2-adrenoceptor subtypes or nitric oxide in the cardiac sympatho-inhibition induced by moxonidine are unknown. Therefore, the cardiac sympatho-inhibition induced by moxonidine (10μg/kgmin) was evaluated before and after of the treatment with the following antagonists/inhibitor: (1) BRL 44408, (300μg/kg, α2A), imiloxan, (3000μg/kg, α2B), and JP-1302, (300μg/kg, α2C), in animals pretreated with AGN 192403 (3000μg/kg, I1 antagonist); (2) N(ω)-nitro-l-arginine methyl ester (l-NAME; 34, 100, and 340μg/kgmin); and (3) the combinations of the highest dose of l-NAME plus AGN 192403 or BRL 44408...
July 5, 2016: European Journal of Pharmacology
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