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https://www.readbyqxmd.com/read/29336842/immunohistochemical-localization-of-angiotensin-at1-receptors-in-the-rat-carotid-body
#1
Dimitrinka Y Atanasova, Angel D Dandov, Nikolay D Dimitrov, Nikolai E Lazarov
The carotid body (CB) is a major peripheral arterial chemoreceptor that initiates respiratory and cardiovascular adjustments to maintain homeostasis. Recent evidence suggests that circulating or locally produced hormones like angiotensin II acting via AT1 receptors modulate its activity in a paracrine-autocrine manner. The aim of this study was to examine the immunohistochemical localization of AT1 receptor in the CB of adult rats and to compare its expression in vehicle-treated animals, and after the long-term application of its selective blocker losartan...
January 12, 2018: Acta Histochemica
https://www.readbyqxmd.com/read/29331564/direct-renin-inhibition-is-not-enough-to-prevent-reactive-oxygen-species-generation-and-vascular-dysfunction-in-renovascular-hypertension
#2
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/29321548/role-and-mechanism-of-at1-aa-in-the-pathogenesis-of-hellp-syndrome
#3
Shurui Bu, Yuxian Wang, Shuqing Sun, Yanqian Zheng, Zhu Jin, Jianming Zhi
HELLP syndrome remains a leading cause of maternal and neonatal mortality and morbidity worldwide, which symptoms include hemolysis, elevated liver enzymes and low platelet count. The objective of this study was to determine whether HELLP is associated with AT1-AA. The positive rate and titer of AT1-AA in plasma from pregnant women were determined, and the correlation of AT1-AA titer with the grade of HELLP was analyzed. A HELLP rat model established by intravenous injection of AT1-AA. Our experimental results show the AT1-AA titer and positive rate were significantly higher in HELLP group, and AT1-AA titer were positively correlated with the level of TNF-α and ET-1 in plasma and the grade of HELLP syndrome...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29308676/vitamin-d-protection-from-rat-diabetic-nephropathy-is-partly-mediated-through-klotho-expression-and-renin-angiotensin-inhibition
#4
Nashwa Eltablawy, Hend Ashour, Laila Ahmed Rashed, Wael Mostafa Hamza
OBJECTIVE: We hypothesised that vitamin D has a beneficial renal protective effect from diabetic nephropathy (DN). METHODS: Four rat groups were included: normal control (control), type 2 diabetes for eight weeks (DM), treated group with angiotensin receptor blocker losartan (DM + L), and vitamin D-treated group started from the onset of diabetes (DM + Vit D). RESULTS: In the both treated groups, we found a significant (p < ...
January 8, 2018: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29305527/erratum-effect-of-losartan-on-prevention-and-progression-of-early-diabetic-nephropathy-in-american-indians-with-type-2-diabetes-diabetes-2013-62-3224-3231
#5
E Jennifer Weil, Gudeta Fufaa, Lois I Jones, Tracy Lovato, Kevin V Lemley, Robert L Hanson, William C Knowler, Peter H Bennett, Berne Yee, Bryan D Myers, Robert G Nelson
No abstract text is available yet for this article.
January 5, 2018: Diabetes
https://www.readbyqxmd.com/read/29300219/the-effect-of-a-non-peptide-angiotensin-ii-type-2-receptor-agonist-compound-21-on-aortic-aneurysm-growth-in-a-mouse-model-of-marfan-syndrome
#6
Peter Verbrugghe, Jelle Verhoeven, Marnick Clijsters, Dominique Vervoort, Jarne Schepens, Bart Meuris, Paul Herijgers
IntroductionAvailable evidence suggests that the renin-angiotensin-aldosterone (RAA) system is a good target for medical intervention on aortic root dilatation in Marfan syndrome (MFS). The effect of Compound 21 (C21), a non-peptide angiotensin II type 2 receptor (AT2R) agonist on aneurysm progression is was tested.MethodsMice with a mutation in fibrillin-1 (Fbn1C1039G/+) and wild-type (WT) mice were treated with vehicle, losartan, C21, enalapril or a combination. Blood pressure, aortic root diameter, and histological slides were evaluated...
January 3, 2018: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/29299955/apocynin-combined-with-drugs-as-coadjuvant-could-be-employed-to-prevent-and-or-treat-the-chronic-kidney-disease
#7
Jorge Osvaldo Montes-Rivera, Feliciano Tamay-Cach, Julio César Quintana-Pérez, Juan Alberto Guevara-Salazar, José Guadalupe Trujillo-Ferrara, Leonardo Del Valle-Mondragón, Mónica Griselda Arellano-Mendoza
A worldwide public health problem is chronic kidney disease (CKD) presenting alarming epidemiological data. It currently affects about 10% of the adult population worldwide and has a high mortality rate. It is now known that oxidative stress represents one of the most important mechanisms in its pathophysiology, from the early stages to the terminal phase. Oxidation increases inflammation and reduces the capacity of NO• to relax vascular smooth muscle, in part by decreasing bioavailability of tetrahydrobiopterin (BH4), leading to endothelial dysfunction and high blood pressure, and due to the limited effectiveness of existing treatments, new drugs are needed to prevent and/or treat these mechanisms...
November 2018: Renal Failure
https://www.readbyqxmd.com/read/29294516/-the-effect-of-captopril-and-losartan-on-paraquat-induced-pulmonary-fibrosis-and-plgf-expression-in-the-lungs-of-rats
#8
M H Zheng, M S Dai, L F Lin
Objective: To investigate the dynamic expression of placenta growth factor (PlGF) in the lungs and its role in paraquat-induced pulmonary fibrosis and to evaluate the effect of ACEI captopril and AT (1) -receptor blocker losartan on paraquat-induced pulmonary fibrosis. Methods: 84 adult healthy female Sprague-Dawley (SD) rats were randomly divided into four groups of different treatments designated as: Control, PQ alone (PQ) , captopril treatment, losartan treatment. Each group was divided into three subgroups of seven animals each...
September 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/29287783/effects-of-telmisartan-and-losartan-on-irradiated-testes
#9
Naira da Silva Mansano, Isabela Fernandes Jorge, Agnaldo Bruno Chies, Gustavo Arruda Viani, Maria Angélica Spadella
AIMS: To analyze the effects of radiation on the reproductive tissue of male Wistar rats and to evaluate whether treatment with the Ang II AT1 receptor antagonists telmisartan and losartan mitigate the dysfunctions resulting from this exposure. MAIN METHODS: Rats were randomly divided into groups: Control, Irradiated, Telmisartan, Losartan, Irradiated+Telmisartan, and Irradiated+Losartan. Single dose of 5Gy was administered directly into the scrotum, followed by treatment with telmisartan (12mg/kg/day) or losartan (34mg/kg/two times/day) for 60days...
December 26, 2017: Life Sciences
https://www.readbyqxmd.com/read/29284530/fimasartan-proteinuria-sustained-reduction-in-comparison-with-losartan-in-diabetic-chronic-kidney-disease-fantastic-study-protocol-for-randomized-controlled-trial
#10
Jang-Young Kim, Jung-Woo Son, Sungha Park, Tea-Hyun Yoo, Yong-Jin Kim, Dong-Ryeol Ryu, Ho Jun Chin
BACKGROUND: Fimasartan is the ninth angiotensin receptor blocker to be developed. However, it has not yet been evaluated for reno-protective effects in hypertensive diabetic chronic kidney disease (CKD). The target blood pressure (BP) for hypertensive diabetic CKD is also a controversial topic. This trial was designed to assess the reno-protective effects of fimasartan compared to those of losartan as a primary outcome. This study also compares the two drugs with regard to cardiovascular and renal outcomes in accordance with target systolic BP (SBP) (as secondary outcomes)...
December 29, 2017: Trials
https://www.readbyqxmd.com/read/29280941/superoxide-anions-and-no-in-the-paraventricular-nucleus-modulate-the-cardiac-sympathetic-afferent-reflex-in-obese-rats
#11
Qing-Bo Lu, Jing Sun, Ying Kang, Hai-Jian Sun, Hui-Shan Wang, Yuan Wang, Guo-Qing Zhu, Ye-Bo Zhou
This study was conducted to explore the hypothesis that the endogenous superoxide anions (O₂-) and nitric oxide (NO) system of the paraventricular nucleus (PVN) regulates the cardiac sympathetic afferent reflex (CSAR) contributing to sympathoexcitation in obese rats induced by a high-fat diet (42% kcal as fat) for 12 weeks. CSAR was evaluated by monitoring the changes of renal sympathetic nerve activity (RSNA) and the mean arterial pressure (MAP) responses to the epicardial application of capsaicin (CAP) in anaesthetized rats...
December 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29280169/comparative-analysis-of-the-effect-of-antihypertensive-drugs-on-the-survival-of-perforator-flaps-in-a-rat-model
#12
Jin-Woo Park, Goo-Hyun Mun
BACKGROUND: First-line antihypertensive drugs include calcium channel blockers, angiotensin converting enzyme inhibitors, angiotensin receptor blockers, and diuretics. In this study, we compared the effects of antihypertensive drugs on the survival of perforator flaps in a rat model. MATERIALS AND METHODS: Fifty normotensive rats were randomly divided into five groups, with 10 rats in each group. Four different antihypertensive drugs were given via oral gavage for 7 days: group I: 1...
December 27, 2017: Microsurgery
https://www.readbyqxmd.com/read/29276929/-choice-of-angiotensin-receptor-blocker-at-various-stages-of-the-cardiovascular-continuum
#13
V I Podzolkov, N A Dragomiretskaya
We present in this paper modern views on components, physiological and pathophysiological effects of the renin-angiotensin system, pathways of its hyperactivation at various stages of the cardiovascular continuum. Special emphasis is made on angiotensin receptor blockers (sartans). Basing on results of analysis of randomized clinical trials of these agents we have outlined clinical situations in which prescription of one or another drug from this group is preferable. For patients with multiple risk factors of cardiovascular complications preferable agent is telmisartan, for patients with nephropathy - irbesartan, for survivors of acute myocardial infarction - valsartan, while for patients with clinical signs of chronic heart failure with low ejection fraction 3 agents can be designated as preferrable - losartan, valsartan, and candesartan...
October 2017: Kardiologiia
https://www.readbyqxmd.com/read/29273947/correction-to-vasomodulatory-effects-of-the-angiotensin-ii-type-1-receptor-antagonist-losartan-on-experimentally-induced-cerebral-vasospasm-after-subarachnoid-haemorrhage
#14
Stefan Wanderer, Jan Mrosek, Florian Gessler, Volker Seifert, Juergen Konczalla
The original version of this paper unfortunately captured the names of Florian Gessler and Volker Seifert incorrectly and are now corrected in this paper.
December 22, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29262397/pharmacological-management-of-a-heart-failure-patient-with-severe-obesity
#15
Gerardo Riccio
Obesity is one of the commonest comorbidities in patients with heart failure, and it is associated with increased mortality risk. However, obese patients are often underrepresented in clinical trials and therefore evidence on their management remains scant. In order to expand knowledge on the management of these patients, anecdotal reports may be considered. In the present case report, we discuss the successful management of an obese patient who received sacubitril/valsartan therapy. This treatment was initiated after a 12-month period of losartan therapy, which did not provide any benefit in terms of heart function...
2017: Cardiology
https://www.readbyqxmd.com/read/29258218/in-vitro-investigation-of-the-interaction-of-tolbutamide-and-losartan-with-human-serum-albumin-in-hyperglycemia-states
#16
Agnieszka Szkudlarek, Danuta Pentak, Anna Ploch, Jadwiga Pożycka, Małgorzata Maciążek-Jurczyk
Serum albumin is exposed to numerous structural modifications which affect its stability and activity. Glycation is one of the processes leading to the loss of the original properties of the albumin and physiological function disorder. In terms of long lasting states of the hyperglycemia, Advanced Glycation End-products (AGEs) are formed. AGEs are responsible for cellular and tissue structure damage that cause the appearance of a number of health consequences and premature aging. The aim of the present study was to analyze the conformational changes of serum albumin by glycation-"fructation"-using multiple spectroscopic techniques, such as absorption (UV-Vis), fluorescence (SFM), circular dichroism (CD) and nuclear magnetic resonance (NMR) spectroscopy and evaluate of possible alteration of binding and competition between tolbutamide (TB, a first-generation sulfonylurea oral hypoglycemic drug) and losartan (LOS, an angiotensin II receptor (AT₁) blocker used in hypertension (1st line with a coexisting diabetes)) in binding to non-glycated (HSA) and glycated (gHSAFRC) human serum albumin in high-affinity binding sites...
December 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29250696/nephrotic-syndrome-after-autologous-hematopoietic-stem-cell-transplantation-a-case-report
#17
Bogdan Obrişcă, Adriana Roxana JurubiŢă, Andreea Gabriella Andronesi, Mihaela Gherghiceanu, Gener Ismail, George Mitroi, Mihai Cristian Hârza
Nephrotic syndrome (NS) is a rare complication of hematopoietic cell transplantation (HCT) and is thought to represent a renal manifestation of chronic graft-versus-host disease (cGVHD). Glomerulopathies occur less often in recipients of autologous as compared to allogeneic HCT and, in this setting, renal pathology is less well characterized. This case report describes a 54-year-old man admitted for the evaluation of a nephrotic-range proteinuria. His past medical history included a ? light-chain secreting multiple myeloma (MM) for which he underwent autologous HCT...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/29248448/zhen-wu-tang-ameliorates-adenine-induced-chronic-renal-failure-in-rats-regulation-of-the-canonical-wnt4-beta-catenin-signaling-in-the-kidneys
#18
Lei La, Lili Wang, Fei Qin, Jian Jiang, Songqi He, Chunxia Wang, Yuhao Li
ETHNOPHARMACOLOGICAL RELEVANCE: Zhen-wu-tang (ZWT), composed of Radix Aconiti lateralis, Rhizoma Atractylodis macrocephalae, Poria, Radix Paeoniae alba and ginger, is a classic Chinese herbal formula for the treatment of chronic kidney diseases that may cause chronic renal failure (CRF). AIM OF THE STUDY: To better understand its clinical use, this study investigated the effects and underlying mechanisms of action of ZWT on CRF. MATERIALS AND METHODS: CRF was induced by adenine...
December 14, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29247482/commonalities-in-epileptogenic-processes-from-different-acute-brain-insults-do-they-translate
#19
REVIEW
Pavel Klein, Raymond Dingledine, Eleonora Aronica, Christophe Bernard, Ingmar Blümcke, Detlev Boison, Martin J Brodie, Amy R Brooks-Kayal, Jerome Engel, Patrick A Forcelli, Lawrence J Hirsch, Rafal M Kaminski, Henrik Klitgaard, Katja Kobow, Daniel H Lowenstein, Phillip L Pearl, Asla Pitkänen, Noora Puhakka, Michael A Rogawski, Dieter Schmidt, Matti Sillanpää, Robert S Sloviter, Christian Steinhäuser, Annamaria Vezzani, Matthew C Walker, Wolfgang Löscher
The most common forms of acquired epilepsies arise following acute brain insults such as traumatic brain injury, stroke, or central nervous system infections. Treatment is effective for only 60%-70% of patients and remains symptomatic despite decades of effort to develop epilepsy prevention therapies. Recent preclinical efforts are focused on likely primary drivers of epileptogenesis, namely inflammation, neuron loss, plasticity, and circuit reorganization. This review suggests a path to identify neuronal and molecular targets for clinical testing of specific hypotheses about epileptogenesis and its prevention or modification...
December 15, 2017: Epilepsia
https://www.readbyqxmd.com/read/29234523/amlodipine-vs-hydrochlorothiazide-is-there-any-disparity-in-its-antihypertensive-effect-or-not
#20
Venu Gopal Jonnalagadda, Kanchan Choudhary, Vijay Kranti Matety
We have read the article "Comparison of effects between calcium channel blocker and diuretics in combination with angiotensin II receptor blocker on 24-h central blood pressure and vascular hemodynamic parameters in hypertensive patients: study design for a multicenter, double-blinded, active controlled, phase 4, randomized trial" by GC Oh., et al. and found it quite interesting to learn the testing of effectiveness between amlodipine and hydrochlorothiazide in combination with losartan. After 4 weeks of therapy, non-responders were exposed for dose titration of losartan/amlodipine 100/5 mg daily or losartan/hydrochlorothiazide 100/25 mg daily...
2017: Clinical Hypertension
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