Dietary capsaicin-mediated attenuation of hypertension in a rat model of renovascular hypertension.

Conclusion: Dietary capsaicin may alleviate 2K1C renovascular hypertension, probably via enhancing phosphorylation of Akt and eNOS. Abbreviations: 2K1C: 2-kidney, 1-clip hypertension model; Akt: protein kinase B; Ang II: angiotensin II; ANOVA: measures analysis of variance; BP: blood pressure; EC: endothelial cell; eNOS: endothelial nitric oxide synthase; GAPDH: glyceraldehyde-3-phosphate dehydrogenase; L-NAME, LN: Nω-Nitro-L-arginine methyl ester hydrochloride; MA: mesenteric arteries; MAP: mean arterial blood pressure; NO: nitric oxide; PKA: protein kinase A; PVDF: polyvinylidene difluoride; SBP: Systolic blood pressure; SHR: spontaneously hypertensive rats; SN: sympathetic nervous; TRPV1: transient receptor potential vanilloid type 1; WKY: Wistar Kyoto rats. PMID: 31518162 [PubMed - as supplied by publisher]
Source: Clinical and Experimental Hypertension - Category: Cardiology Authors: Tags: Clin Exp Hypertens Source Type: research

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Publication date: Available online 12 September 2019Source: Journal of Critical CareAuthor(s): M.-H. Ho Anthony, Glenio B. MizubutiAbstractProphylactic administration of a vasopressor to mitigate the hypotensive effect of propofol (and/or other co-induction agents) during sedation/anesthesia immediately prior to tracheal intubation in frail patients in the intensive care unit and emergency and operating rooms appears to be not an uncommon practice. We submit that this practice is unnecessary and potentially harmful. Despite restoring the blood pressure, phenylephrine, for instance, may have an additive or synergistic effec...
Source: Journal of Critical Care - Category: Gastroenterology Source Type: research
Hypertension induced by NO synthase blockade is characterized by increased sympathetic nerve activity to renal (rSNA) and splanchnic nerve (sSNA). The rats that had the greatest reduction in NO levels in plasma by L ‐NAME were those that developed higher blood pressure levels. The reduction in the NO level partially explains the variations in sSNA but not in rSNA. AbstractWe aimed to investigate the effects of nitric oxide (NO) synthesis inhibition by NO synthase inhibitor N ‐nitro‐L‐arginine‐methyl ester (L‐NAME) treatment on the sympathetic vasomotor nerve activity (SNA) on two sympathetic vasomotor nerves, t...
Source: Physiological Reports - Category: Physiology Authors: Tags: Original Research Source Type: research
Karel Pacak Pheochromocytomas and paragangliomas (PPGLs) are rare catecholamine-secreting neuroendocrine tumors of the adrenal medulla and sympathetic/parasympathetic ganglion cells, respectively. Excessive release of catecholamines leads to episodic symptoms and signs of PPGL, which include hypertension, headache, palpitations, and diaphoresis. Intraoperatively, large amounts of catecholamines are released into the bloodstream through handling and manipulation of the tumor(s). In contrast, there could also be an abrupt decline in catecholamine levels after tumor resection. Because of such binary manifestations of PP...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Review Source Type: research
Conclusions: Cannabidiol (1) induces the Bezold-Jarisch reflex via TRPV1 receptors (which undergo tachyphylaxis) more markedly in SHR than in WKY; (2) inhibits the Bezold-Jarisch reflex induced by activation of 5-HT3 but not TRPV1 receptors; (3) has peripheral sympathomimetic, (4) vasodilatory and (5) negative inotropic effects. The above properties of CBD should be taken under consideration when CBD is used for therapeutic purposes.
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
This article is protected by copyright. All rights reserved. PMID: 31077371 [PubMed - as supplied by publisher]
Source: The Journal of Physiology - Category: Physiology Authors: Tags: J Physiol Source Type: research
Conclusion: Our results suggest that the AT1R mediated hypertensive response to angiotensin II within the NTS in normotensive rats is GABA and NO dependent. Nitric oxide produced within the NTS tonically potentiates local GABA and glutamate release. Introduction The central nervous system network that regulates the level of sympathetic tone and, hence, blood pressure, is located in the brainstem and consists mainly of the rostral ventrolateral medulla (RVLM), the paraventricular nucleus (PVN) of the hypothalamus and the nucleus tractus solitarii (NTS) (Guyenet, 2006). It is well-established that the RVLM, the so-ca...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
In this study, spontaneous baroreflex sensitivity (SBRS) was also calculated through the sequence method by the computer software CardioSeries (v2.4). A baroreflex sequence was defined as a sequence of at least four heart beats in which both systolic arterial pressure and pulse interval increased (up sequences) or decreased (down sequences) as previously described (Braga et al., 2008). Evaluation of Sympathetic Tonus to the Vasculature In a separate group of rats, the sympathetic vascular tone was evaluated by an intravenous injection of hexamethonium (30 mg/Kg, Sigma-Aldrich, São Paulo, Brazil), a ganglionic bloc...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Olga Plekhanova1,2*, Yelena Parfyonova1,2, Irina Beloglazova1,2, Bradford C. Berk3 and Vsevolod Tkachuk1,2 1Faculty of Medicine, Lomonosov Moscow State University, Moscow, Russia 2National Medical Research Center of Cardiology, Moscow, Russia 3Aab Cardiovascular Research Institute, University of Rochester Medical Center, Rochester, NY, United States Constrictive vascular remodeling limiting blood flow, as well as compensatory outward remodeling, has been observed in many cardiovascular diseases; however, the underlying mechanisms regulating the remodeling response of the vessels remain unclear. Plasminogen acti...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Sara AlMarabeh, Mohammed H. Abdulla and Ken D. O'Halloran* Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland Renal sensory nerves are important in the regulation of body fluid and electrolyte homeostasis, and blood pressure. Activation of renal mechanoreceptor afferents triggers a negative feedback reno-renal reflex that leads to the inhibition of sympathetic nervous outflow. Conversely, activation of renal chemoreceptor afferents elicits reflex sympathoexcitation. Dysregulation of reno-renal reflexes by suppression of the inhibitory refle...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Anna M. D. Watson1,2*, Eleanor A. M. Gould2, Sally A. Penfold2, Gavin W. Lambert2,3, Putra Riza Pratama2, Aozhi Dai1, Stephen P. Gray2, Geoffrey A. Head2† and Karin A. Jandeleit-Dahm1,2† 1Department of Diabetes, Central Clinical School, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, VIC, Australia 2Baker Heart and Diabetes Institute, Melbourne, VIC, Australia 3Iverson Health Innovation Research Institute, Faculty of Health, Arts and Design, Swinburne University of Technology, Hawthorn, VIC, Australia Patients with diabetic hypertensive nephropathy have accelerated ...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
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