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renovascular hypertension

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https://www.readbyqxmd.com/read/29331564/direct-renin-inhibition-is-not-enough-to-prevent-reactive-oxygen-species-generation-and-vascular-dysfunction-in-renovascular-hypertension
#1
Alisson Martins-Oliveira, Danielle A Guimaraes, Carla S Ceron, Elen Rizzi, Diogo M M Oliveira, Carlos R Tirapelli, Dulce E Casarini, Fernanda B Fernandes, Lucas C Pinheiro, Jose E Tanus-Santos
Renin-angiotensin system activation promotes oxidative stress and endothelial dysfunction. However, no previous study has examined the effects of the renin inhibitior aliskiren, either alone or combined with angiotensin II type 1 antagonists on alterations induced by two-kidney, one-clip (2K1C) hypertension. We compared the vascular effects of aliskiren (50mg/kg/day), losartan (10mg/kg/day), or both by gavage for 4 weeks in 2K1C and control rats. Treatment with losartan, aliskiren, or both exerted similar antihypertensive effects...
January 10, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29305157/enhanced-angiotensin-ii-induced-sodium-appetite-in-renovascular-hypertensive-rats
#2
Camila F Roncari, Rafaela M Barbosa, Regina C Vendramini, Laurival A De Luca, José V Menani, Eduardo Colombari, Débora S A Colombari
Renovascular hypertensive 2-kidney, 1-clip (2K1C) rats have an increased activity of the renin-angiotensin system and an initial transitory increase in daily water and NaCl intake. However, the dipsogenic and natriorexigenic responses to angiotensin II (ANG II) have not been tested yet in 2K1C rats. Therefore, in the present study, we evaluated water and 0.3 M NaCl intake induced by water deprivation (WD)-partial rehydration (PR) or intracerebroventricular (icv) ANG II in 2K1C rats. In addition, the cardiovascular changes to these treatments were also evaluated...
January 2, 2018: Peptides
https://www.readbyqxmd.com/read/29287894/-monitoring-of-hypertension-in-patients-orally-treated-by-angiogenesis-inhibitor-in-daily-practice
#3
Lisa Belaid, Sahar Bayat-Makoei, Brigitte Laguerre, Cécile Vigneau
OBJECTIVE: The aim of this study is to measure the monitoring and the incidence of renovascular effects of angiogenesis inhibitors in real population. METHOD: Are included in this descriptive, monocentric, practical study, patients of 18 years old and more, orally treated by angiogenesis inhibitors and monitored in consultation by clinician nurses. The main interest variable is the incidence of hypertension at three months of treatment. RESULTS: From January, 2011 to July, 2014, 324 patients have been included, whose 53% are men...
December 26, 2017: Néphrologie & Thérapeutique
https://www.readbyqxmd.com/read/29282014/spectrum-characteristics-of-patients-with-chronic-kidney-disease-ckd-with-increasing-age-in-a-major-metropolitan-renal-service
#4
Usman Mahmood, Helen G Healy, Adrian Kark, Anne Cameron, Zaimin Wang, Rajitha Abeysekera, Wendy E Hoy
BACKGROUND: Aim of our study is to describe, in people with CKD, the demographic and clinical characteristics and outcomes with increasing age. The prevalence of CKD in Western populations, where longevity is the norm, is about 10-15%, but how age influence different characteristics of patients with CKD is largely not known. METHODS: One thousand two hundred sixty-five patients enrolled in the CKD.QLD registry at the Royal Brisbane and Women's Hospital were grouped according to age at consent i...
December 28, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/29281158/treatment-outcomes-according-to-underlying-disease-in-pediatric-renovascular-hypertension
#5
Yeonhee Lee, Young Shin Lim, Sang Taek Lee, Heeyeon Cho
BACKGROUND: Renovascular hypertension (RVH) accounts for 5-10% of pediatric hypertension, and can be associated with underlying disease involving other organs. The purpose of this study was to evaluate the clinical characteristics and assess the treatment outcomes of Korean pediatric patients with RVH. METHODS: The medical records of 25 Korean pediatric patients with RVH were retrospectively reviewed. RESULTS: Twenty-four patients had underlying disease, and the most common cause was Moyamoya disease (MMD) (n = 10, 40%)...
December 27, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/29274384/carthamus-tinctorius-l-extract-improves-hemodynamic-and-vascular-alterations-in-a-rat-model-of-renovascular-hypertension-through-ang-ii-at1r-nadph-oxidase-pathway
#6
Sarawoot Bunbupha, Chutamas Wunpathe, Putcharawipa Maneesai, Thewarid Berkban, Upa Kukongviriyapan, Veerapol Kukongviriyapan, Parichat Prachaney, Poungrat Pakdeechote
Carthamus tinctorius L. (CT) is widely used in Asian countries as a beverage and in folk medicine. The effects of CT extract on hemodynamics, vascular remodeling, the renin-angiotensin system (RAS) and oxidative stress in the two-kidney, one clip (2K-1C) hypertensive rat model were investigated. Renovascular hypertension was induced in male Sprague-Dawley rats and were treated with CT extract (500mg/kg/day) or captopril (5mg/kg/day) or vehicle for four weeks. CT extract or captopril reduced blood pressure, hindlimb vascular resistance, and increased hindlimb blood flow in 2K-1C hypertensive rats (p <0...
December 20, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29244537/role-of-renin-angiotensin-aldosterone-system-on-short-term-blood-pressure-variability-in-hypertensive-patients
#7
Minako Inoue, Kiyoshi Matsumura, Yoshie Haga, Yasuo Kansui, Kenichi Goto, Toshio Ohtsubo, Takanari Kitazono
The relationship between the renin-angiotensin aldosterone system and short-term blood pressure variability has not been well elucidated. Here, we investigated whether blood pressure variability determined by ambulatory blood pressure monitoring differed among patients with primary aldosteronism (PA), renovascular hypertension (RVHT), and essential hypertension (EHT). We examined 25 patients with PA, 28 patients with RVHT, and 18 patients with EHT. Ambulatory blood pressure monitoring was conducted in all patients...
December 15, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/29234376/roles-of-nitric-oxide-and-prostaglandins-in-the-sustained-antihypertensive-effects-of-acanthospermum-hispidum-dc-on-ovariectomized-rats-with-renovascular-hypertension
#8
Rhanany Alan Calloi Palozi, Maysa Isernhagen Schaedler, Cleide Adriane Signor Tirloni, Aniely Oliveira Silva, Francislaine Aparecida Dos Reis Lívero, Roosevelt Isaias Carvalho Souza, Ariany Carvalho Dos Santos, Thiago Bruno Lima Prando, Lauro Mera de Souza, Arquimedes Gasparotto Junior
Although Acanthospermum hispidum is used in Brazilian folk medicine as an antihypertensive, no study evaluated its effects on a renovascular hypertension and ovariectomy model. So, this study investigated the mechanisms involved in the antihypertensive effects of an ethanol-soluble fraction obtained from A. hispidum (ESAH) using two-kidney-one-clip hypertension in ovariectomized rats (2K1C plus OVT). ESAH was orally administered at doses of 30, 100, and 300 mg/kg, daily, for 28 days, after 5 weeks of surgery...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29144824/17%C3%AE-hydroxylase-deficiency-is-an-underdiagnosed-disease-high-frequency-of-misdiagnoses-in-a-large-cohort-of-brazilian-patients
#9
Rafaela Fontenele, Marivânia Costa-Santos, Claudio E Kater
OBJECTIVE: 17α-Hydroxylase deficiency (P450c17D) is characterized by hypogonadism and mineralocorticoid hypertension. We aimed to estimate the relative incidence and spectrum of preliminary misdiagnoses in Brazilian P450c17D patients. DESIGN: Cross-sectional study. METHODS: We reviewed, updated, and analyzed data of 40 P450c17D patients (21 XY, 19 XX). RESULTS: Complete data were unavailable for two patients. Seven patients were relatives of an index case...
November 16, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/29135152/-masks-of-urogenital-tuberculosis-as-the-cause-of-diagnostic-errors
#10
D P Kholtobin, E V Kulchavenya
Urogenital tuberculosis does not have pathognomonic symptoms, so diagnostic errors are quite common. This systematic review of literature was conducted to identify the causes and estimate the incidence of erroneous diagnoses. We critically evaluated some articles in which the authors describe observations of urogenital tuberculosis as rare and unusual because they never encountered this disease, but in fact that were typical manifestations of genitourinary tuberculosis. The authors analyzed and illustrated the features of urinary tuberculosis in patients with pulmonary tuberculosis, differential diagnosis of urogenital tuberculosis and kidney cancer and male genitourinary organs, described errors in the diagnosis of urethral, testicular, penile, prostatic and epididymal tuberculosis...
October 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/29114109/frequency-of-acccessory-renal-arteries-diagnosed-by-computerized-tomography
#11
Sabina Prevljak, Edin Prelevic, Salih Mesic, Odey Ali Abud, Spomenka Kristic, Sandra Vegar-Zubovic
Introduction: Accessory renal arteries play a significant role in kidney and abdominal aorta surgery, and renovascular hypertension. In the published literature, the frequency varies considerably, depending on the size of the sample, the method of examination and the ethnic group. Materials and Methods: The aim of this study is to determine the general frequency of accessory renal arteries, their frequency in relation to gender, the origin and the vascularization area, and to determine the differences in left-right and bilateral distribution...
September 2017: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/29111361/cerebral-venous-collagen-remodeling-in-a-modified-white-matter-lesions-animal-model
#12
Jing Lin, Linfang Lan, Dilong Wang, Baoshan Qiu, Yuhua Fan
To mimic the expected pathological changes of white matter lesions (WMLs) and increase the stability, we applied modified two-vessel occlusion (modified 2VO) (1-week interval bilateral carotid artery occlusion) in stroke-prone renovascular hypertensive rats (RHRSP) and established a modified WMLs model (RHRSP/modified 2VO) that compared their phenotypes with RHRSP and sham-operated rats. In addition, we tried to differentiate small veins from small arteries through the presence of smooth muscle to study the pathological changes of small veins detailed in the model...
October 31, 2017: Neuroscience
https://www.readbyqxmd.com/read/29101991/acr-appropriateness-criteria%C3%A2-renovascular-hypertension
#13
Howard J Harvin, Nupur Verma, Paul Nikolaidis, Michael Hanley, Vikram S Dogra, Stanley Goldfarb, John L Gore, Stephen J Savage, Michael L Steigner, Richard Strax, Myles T Taffel, Jade J Wong-You-Cheong, Don C Yoo, Erick M Remer, Karin E Dill, Mark E Lockhart
Renovascular hypertension is the most common type of secondary hypertension and is estimated to have a prevalence between 0.5% and 5% of the general hypertensive population, and an even higher prevalence among patients with severe hypertension and end-stage renal disease, approaching 25% in elderly dialysis patients. Investigation for renal artery stenosis is appropriate when clinical presentation suggests secondary hypertension rather than primary hypertension, when there is not another known cause of secondary hypertension, and when intervention would be carried out if a significant renal artery stenosis were identified...
November 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29094913/secondary-hypertension-discovering-the-underlying-cause
#14
REVIEW
Lesley Charles, Jean Triscott, Bonnie Dobbs
Most patients with hypertension have no clear etiology and are classified as having primary hypertension. However, 5% to 10% of these patients may have secondary hypertension, which indicates an underlying and potentially reversible cause. The prevalence and potential etiologies of secondary hypertension vary by age. The most common causes in children are renal parenchymal disease and coarctation of the aorta. In adults 65 years and older, atherosclerotic renal artery stenosis, renal failure, and hypothyroidism are common causes...
October 1, 2017: American Family Physician
https://www.readbyqxmd.com/read/29073282/cardiovascular-phenotype-in-smad3-deficient-mice-with-renovascular-hypertension
#15
Sonu Kashyap, Gina Warner, Zeng Hu, Feng Gao, Mazen Osman, Yousif Al Saiegh, Karen R Lien, Karl Nath, Joseph P Grande
Renovascular hypertension (RVH) has deleterious effects on both the kidney and the heart. TGF-β signaling through Smad3 directs tissue fibrosis in chronic injury models. In the 2-kidney 1-clip (2K1C) model of RVH, employing mice on the 129 genetic background, Smad3 deficiency (KO) protects the stenotic kidney (STK) from development of interstitial fibrosis. However, these mice have an increased incidence of sudden cardiac death following 2K1C surgery. The purpose of this study was to characterize the cardiovascular phenotype of these mice...
2017: PloS One
https://www.readbyqxmd.com/read/29065722/perindopril-arginine-and-amlodipine-besylate-for-hypertension-a-safety-evaluation
#16
William J Elliott, Evgeny A Bistrika
Controlling blood pressure is a global health priority; single-pill antihypertensive combinations may improve adherence, persistence, and outcomes. Areas covered: A novel combination of perindopril arginine and amlodipine besylate was recently approved. A systematic review of the literature revealed its most common adverse effects as: peripheral edema (depending on the dose of amlodipine, but attenuated by perindopril), cough, dizziness and hypotension. Dose-dependent hyperkalemia, impairment of renal function (especially in renovascular hypertension), angioedema, and teratogenicity were derived from experience with other ACE-inhibitors...
October 31, 2017: Expert Opinion on Drug Safety
https://www.readbyqxmd.com/read/29056991/atherosclerotic-renovascular-disease-epidemiology-treatment-and-current-challenges
#17
REVIEW
Diana Vassallo, Philip A Kalra
The neutral results of recent large randomized controlled trials comparing renal revascularization with optimal medical therapy in patients with atherosclerotic renovascular disease (ARVD) have cast doubt on the role of revascularization in the management of unselected patients with this condition. However, these studies have strengthened the evidence base for the role of contemporary intensive medical vascular protection therapy and aggressive risk factor control in improving clinical outcomes in ARVD. Patients presenting with 'high-risk' clinical features such as uncontrolled hypertension, rapidly declining renal function or flash pulmonary oedema are underrepresented in these studies; hence these results may not be applicable to all patients with ARVD...
2017: Postępy W Kardiologii Interwencyjnej, Advances in Interventional Cardiology
https://www.readbyqxmd.com/read/29046642/cooperative-oxygen-sensing-by-the-kidney-and-carotid-body-in-blood-pressure-control
#18
Daniela Patinha, Wioletta Pijacka, Julian F R Paton, Maarten P Koeners
Oxygen sensing mechanisms are vital for homeostasis and survival. When oxygen levels are too low (hypoxia), blood flow has to be increased, metabolism reduced, or a combination of both, to counteract tissue damage. These adjustments are regulated by local, humoral, or neural reflex mechanisms. The kidney and the carotid body are both directly sensitive to falls in the partial pressure of oxygen and trigger reflex adjustments and thus act as oxygen sensors. We hypothesize a cooperative oxygen sensing function by both the kidney and carotid body to ensure maintenance of whole body blood flow and tissue oxygen homeostasis...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29034474/altered-nmda-receptor-evoked-intracellular-ca-2-dynamics-in-magnocellular-neurosecretory-neurons-of-hypertensive-rats
#19
Meng Zhang, Javier E Stern
KEY POINTS: NMDA receptor (NMDAR)-mediated Ca(2+) signalling plays a critical role in modulating hypothalamic neurosecretory function. However, whether an altered NMDAR-evoked changes in Ca(2+) (NMDAR-ΔCa(2+) ) signalling in magnocellular neurosecretory cells (MNCs) may contribute to neurohumoral activation during disease states is unknown. We show that activation of NMDARs evoked similar inward currents in MNCs of sham and renovascular hypertensive (RVH) rats. Despite this, a prolonged and larger NMDAR-ΔCa(2+) response was observed in the latter...
October 15, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28987634/heterodimerization-of-apelin-and-opioid-receptors-and-cardiac-inotropic-and-lusitropic-effects-of-apelin-in-2k1c-hypertension-role-of-perk1-2-and-pkc
#20
Farzaneh Rostamzadeh, Hamid Najafipour, Mahboobeh Yeganeh-Hajahmadi, Saeed Esmaeili-Mahani, Siyavash Joukar, Maryam Iranpour
AIMS: Kappa Opioid receptors (KORs) change the impact of apelin on the phosphorylated ERK1/2 (pERK1/2). However, the role of interaction between KOR and apelin receptors (APJ) on the cardiac contractility effects of apelin and in regulation of pERK1/2 and PKC in the heart of renovascular hypertensive (2K1C) rats is unknown. MAIN METHODS: Hemodynamic factors, the heterodimerization of KOR and APJ, the expression of KOR mRNA and protein and pERK1/2 in the left ventricle of 2K1C rats were measured following APJ, KOR, PKC and Gi path inhibition by F13A, nor-BNI, chelerythrine and PTX respectively...
October 4, 2017: Life Sciences
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