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effect of angiotensin 2 on the kidneys

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https://www.readbyqxmd.com/read/27925507/haematopoietic-effects-of-angelica-sinensis-root-cap-polysaccharides-against-lisinopril-induced-anaemia-in-albino-rats
#1
Fryal Younas, Bilal Aslam, Faqir Muhammad, Mashkoor Mohsin, Ahmad Raza, Muhammad Naeem Faisal, Shamshud-Ul- Hassan, Wafa Majeed
CONTEXT: Angelica sinensis L. (Umbelliferae) has medicinal properties. OBJECTIVES: The present study evaluates the haematopoietic effects of A. sinensis polysaccharides (ASP) against lisinopril-induced anaemia. MATERIALS AND METHODS: Thirty healthy adult male albino rats were randomly divided into five groups (n = 6). Group I was control group. Group II was treated with angiotensin-converting enzyme inhibitor (ACEI, 20 mg/kg/day) to induce anaemia...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/27916702/chronic-kidney-disease-accelerates-cognitive-impairment-in-a-mouse-model-of-alzheimer-s-disease-through-angiotensin-ii
#2
Takashi Nakagawa, Yu Hasegawa, Ken Uekawa, Shokei Kim-Mitsuyama
Epidemiological studies suggest that chronic kidney disease (CKD) is a significant risk factor in the development of cognitive decline. However, the exact role of CKD in cognitive impairment or dementia is unclear. This work was performed to examine the potential impact of CKD on cognitive impairment in Alzheimer's disease (AD), focusing on angiotensin II. (1) CKD was induced in 5XFAD mice, an AD model mouse, and wild-type mice by feeding adenine-containing diet and the effect on cognitive function was compared between both strains...
December 1, 2016: Experimental Gerontology
https://www.readbyqxmd.com/read/27913661/effects-of-exendin-4-on-the-intrarenal-renin-angiotensin-system-and-interstitial-fibrosis-in-unilateral-ureteral-obstruction-mice-exendin-4-and-unilateral-ureteral-obstruction
#3
Ying Le, Zongji Zheng, Junyu Xue, Mengling Cheng, Meiping Guan, Yaoming Xue
OBJECTIVE: The objective of this article is to investigate the renoprotecive effects of exendin-4 in a mouse model of unilateral ureteral obstruction (UUO) and explore the putative mechanisms. METHODS: Male Balbc mice underwent sham operation or UUO surgery, and then received intraperitoneal injection of vehicle or exendin-4, respectively. After 14 days, mice were sacrificed and the left kidneys were collected and analyzed by histology, immunohistochemistry, Western blot, quantitative real-time reverse transcription polymerase chain reaction, radioimmunoassay and enzyme-linked immunosorbent assay...
October 2016: Journal of the Renin-angiotensin-aldosterone System: JRAAS
https://www.readbyqxmd.com/read/27885332/2-3-5-4-tetrahydroxystilbene-2-o-%C3%AE-d-glucoside-promotes-expression-of-the-longevity-gene-klotho
#4
Shuang Ling, Ju Duan, Rongzhen Ni, Jin-Wen Xu
The longevity gene klotho has numerous physiological functions, such as regulating calcium and phosphorus levels, delaying senescence, improving cognition, reducing oxidative stress, and protecting vascular endothelial cells. This study tested whether 2,3,5,4'-Tetrahydroxystilbene-2-O-β-D-glucoside (THSG), a small molecule with antiaging effects, regulates the expression and physiological effects of klotho. Our results showed that THSG dose-dependently increased the luciferase reporter activity of the klotho gene, reversed the decrease in mRNA and protein expression of klotho which was induced by angiotensin II in NRK-52E renal tubular epithelial cells, and increased klotho mRNA expression in the cerebral cortex, hippocampus, testis, and kidney medulla of spontaneously hypertensive rats...
2016: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/27830348/steroidal-and-novel-non-steroidal-mineralocorticoid-receptor-antagonists-in-heart-failure-and-cardiorenal-diseases-comparison-at-bench-and-bedside
#5
Peter Kolkhof, Frederic Jaisser, So-Young Kim, Gerasimos Filippatos, Christina Nowack, Bertram Pitt
Characterization of mice with cell-specific deletion or overexpression of the mineralocorticoid receptor (MR) shed a new light on its role in health and disease. Pathophysiological MR activation contributes to a plethora of deleterious molecular mechanisms in the development of cardiorenal diseases like chronic kidney disease (CKD) and heart failure (HF). Accordingly, the available steroidal MR antagonists (MRAs) spironolactone (first generation MRA) and eplerenone (second generation MRA) have been shown to be effective in reducing cardiovascular (CV) mortality and morbidity in patients with chronic HF and a reduced left ventricular ejection fraction (HFrEF)...
November 10, 2016: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/27826732/renin-angiotensin-ii-aldosterone-system-blockers-and-time-to-renal-replacement-therapy-in-children-with-ckd
#6
Alison G Abraham, Aisha Betoko, Jeffrey J Fadrowski, Christopher Pierce, Susan L Furth, Bradley A Warady, Alvaro Muñoz
BACKGROUND: Clinical care decisions to treat chronic kidney disease (CKD) in a growing child must often be made without the benefit of evidence from clinical trials. We used observational data from the Chronic Kidney Disease in Children cohort to estimate the effectiveness of renin-angiotensin II-aldosterone system blockade (RAAS) to delay renal replacement therapy (RRT) in children with CKD. METHODS: A total of 851 participants (median age: 11 years, median glomerular filtration rate [GFR]: 52 ml/min/1...
November 8, 2016: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/27822054/impact-of-sodium-glucose-cotransporter-2-inhibitors-on-blood-pressure
#7
REVIEW
James W Reed
SGLT2 inhibitors are glucose-lowering agents used to treat type 2 diabetes mellitus (T2DM). These agents target the kidney to promote urinary glucose excretion, resulting in improved blood glucose control. SGLT2-inhibitor therapy is also associated with weight loss and blood pressure (BP) lowering. Hypertension is a common comorbidity in patients with T2DM, and is associated with excess morbidity and mortality. This review summarizes data on the effect of SGLT2 inhibitors marketed in the US (namely canagliflozin, dapagliflozin, or empagliflozin) on BP in patients with T2DM...
2016: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/27804233/quality-of-life-development-during-initial-hemodialysis-therapy-and-association-with-loss-of-residual-renal-function
#8
Christina G Poulsen, Krista D Kjaergaard, Christian D Peters, Bente Jespersen, Jens D Jensen
Introduction Health related quality of life (HRQOL) is markedly reduced in hemodialysis patients compared to the general population. We investigated the course of self-reported HRQOL over time and the association with selected factors, focusing on changes in glomerular filtration rate (GFR). Methods Eighty-two newly started hemodialysis patients from the SAFIR cohort filled out the Kidney Disease Quality of Life Short Form Version 1.3 (KDQOL-SF(TM) ) questionnaire at baseline, 6 and 12 months. The SAFIR study was a randomized, placebo-controlled, double-blind intervention study, examining the effects of the angiotensin II receptor blocker irbesartan...
November 1, 2016: Hemodialysis International
https://www.readbyqxmd.com/read/27802313/effect-of-sodium-glucose-co-transporter-2-inhibitor-dapagliflozin-on-renal-renin-angiotensin-system-in-an-animal-model-of-type-2-diabetes
#9
Seok Joon Shin, Sungjin Chung, Soo Jung Kim, Eun-Mi Lee, Young-Hye Yoo, Ji-Won Kim, Yu-Bae Ahn, Eun-Sook Kim, Sung-Dae Moon, Myung-Jun Kim, Seung-Hyun Ko
BACKGROUND: Renal renin-angiotensin system (RAS) activation is one of the important pathogenic mechanisms in the development of diabetic nephropathy in type 2 diabetes. The aim of this study was to investigate the effects of a sodium-glucose co-transporter 2 (SGLT-2) inhibitor, dapagliflozin, on renal RAS in an animal model with type 2 diabetes. METHODS: Dapagliflozin (1.0 mg/kg, OL-DA) or voglibose (0.6 mg/kg, OL-VO, diabetic control) (n = 10 each) was administered to Otsuka Long-Evans Tokushima Fatty (OLETF) rats for 12 weeks...
2016: PloS One
https://www.readbyqxmd.com/read/27798196/klotho-suppresses-the-renin-angiotensin-system-in-adriamycin-nephropathy
#10
Tsuneo Takenaka, Tsutomu Inoue, Takashi Miyazaki, Hiroyuki Kobori, Akira Nishiyama, Naohito Ishii, Matsuhiko Hayashi, Hiromichi Suzuki
BACKGROUNDS: Klotho protein interacts with the transforming growth factor β (TGF-β) receptor and Wnt, which contribute to the progression of renal disease, inhibiting their signals. Renal and circulating klotho levels are diminished in chronic kidney disease. METHODS: Experiments were performed to assess whether supplementation of klotho protein could have protective effects on the kidney. Rats were injected with adriamycin (5 mg/kg) and divided into three groups: those treated with vehicle, those treated with klotho protein and those treated with klotho plus 4-benzyl-2-methyl-1,2,4-thiadiazolidine-3,5-dione (TDZD)...
October 17, 2016: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/27779758/trpv4-participates-in-pressure-induced-inhibition-of-renin-secretion-by-juxtaglomerular-cells
#11
François Seghers, Xavier Yerna, Nadège Zanou, Olivier Devuyst, Rudi Vennekens, Bernd Nilius, Philippe Gailly
KEY POINTS: Increase in blood pressure in the renal afferent arteriole is known to induce an increase in cytosolic calcium concentration ([Ca(2+) ]i ) of juxtaglomerular (JG) cells and to result in a decreased secretion of renin. Mechanical stimulation of As4.1 JG cells induces an increase in [Ca(2+) ]i that is inhibited by HC067047 and RN1734, two inhibitors of TRPV4, or by siRNA-mediated repression of TRPV4. Inhibition of TRPV4 impairs pressure-induced decrease in renin secretion. Compared to wild-type mice, Trpv4(-/-) mice present increased resting plasma levels of renin and aldosterone and present a significantly altered pressure-renin relationship...
October 25, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27775793/microrna-125b-contributes-to-high-glucose-induced-reactive-oxygen-species-generation-and-apoptosis-in-hk-2-renal-tubular-epithelial-cells-by-targeting-angiotensin-converting-enzyme-2
#12
Y-F Huang, Y Zhang, C-X Liu, J Huang, G-H Ding
OBJECTIVE: Hyperglycemia induces apoptosis of renal tubular epithelial cells and contributes to tubular injury in diabetic nephropathy. Angiotensin-converting enzyme 2 (ACE2) is known to protect against diabetic kidney injury. However, the mechanism for the dysregulation of ACE2 expression in diabetic nephropathy is unclear. MATERIALS AND METHODS: Bioinformatic analysis and luciferase reporter assay were done to identify ACE2-targeting microRNAs. Gain- and loss-of-function experiments were performed to determine the biological roles of the ACE2-targeting microRNAs in high glucose-induced damage to renal tubular epithelial cells...
October 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27763560/renal-protective-effects-of-17%C3%AE-estradiol-on-mice-with-acute-aristolochic-acid-nephropathy
#13
Min Shi, Liang Ma, Li Zhou, Ping Fu
Aristolochic acid nephropathy (AAN) is a progressive kidney disease caused by a Chinese herb containing aristolochic acid. Excessive death of renal tubular epithelial cells (RTECs) characterized the acute phase of AAN. Therapies for acute AAN were limited, such as steroids and angiotensin-receptor blockers (ARBs)/angiotensin-converting enzyme inhibitors (ACEIs). It was interesting that, in acute AAN, female patients showed relative slower progression to renal failure than males. In a previous study, female hormone 17β-estradiol (E2) was found to attenuate renal ischemia-reperfusion injury...
October 18, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27757935/impact-of-salt-intake-on-the-pathogenesis-and-treatment-of-hypertension
#14
Petra Rust, Cem Ekmekcioglu
Excessive dietary salt (sodium chloride) intake is associated with an increased risk for hypertension, which in turn is especially a major risk factor for stroke and other cardiovascular pathologies, but also kidney diseases. Besides, high salt intake or preference for salty food is discussed to be positive associated with stomach cancer, and according to recent studies probably also obesity risk. On the other hand a reduction of dietary salt intake leads to a considerable reduction in blood pressure, especially in hypertensive patients but to a lesser extent also in normotensives as several meta-analyses of interventional studies have shown...
October 19, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27754292/br-09-2-novel-approaches-to-the-renin-angiotensin-system-in-proteinuric-kideny-disease
#15
James Scholey
The classical view of the RAS is a linear signaling pathway beginning with the conversion of angiotensinogen to ANG I by renin, an enzyme secreted by the kidney. ANG I is converted to ANG II by angiotensin converting enzyme (ACE) ANG II binds to the G-protein coupled angiotensin II receptor type 1. The RAS is a circulating system but we now know that the RAS is also locally expressed in a number of tissues, including the kidneys and the heart. ANG II exerts adverse hemodynamic and non-hemodynamic effects on renal cells...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754289/br-08-1-high-sodium-intake-reduction-in-diabetes-with-hypertension
#16
Zhiming Zhu
Management of hypertension in diabetes is critical for reducing cardiovascular mortality and morbidity. Dietary approaches for controlling high blood pressure have historically focused on sodium. Thus, many guidelines recommend that patients with type 2 diabetes reduce high sodium intake. Nonetheless, the potential benefits of sodium reduction are debatable. The kidney has a crucial role in glucose filtration and reabsorption in addition to its regulation of fluid and electrolyte homeostasis. A key factor linking sodium uptake and glucose transport is the sodium-glucose cotransporter 2 (SGLT2) in renal proximal tubular cells...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754272/sy-17-2-inflammation-immunity-and-hypertension
#17
David Harrison
Hypertension remains an enormous health care burden that affects one third of the population. Despite its prevalence the cause of most cases of hypertension remains unknown. Our laboratory has defined a novel mechanism for hypertension involving adaptive immunity. We found that mice lacking lymphocytes (RAG-1 mice) develop blunted hypertensive responses to a variety of stimuli including chronic angiotensin II infusion, DOCA-salt challenge and norepinephrine infusion. Adoptive transfer of T cells, but not B cells, restores the hypertensive responses to these stimuli...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754207/apsh-yi-06-effects-of-angiotensin-ii-type-2-receptor-in-fetal-growth-restriction-mice
#18
Toshifumi Yamauchi, Masaki Mogi, Hirotomo Nakaoka, Kana Tsukuda, Masanori Kukida, Akinori Higaki, Hui-Yu Bai, Bao-Shuai Shan, Li-Juan Min, Jun Iwanami, Masatugu Horiuchi
OBJECTIVE: Fetal growth restriction (FGR) is one of the risks of cardiovascular problems in adulthood. We previously reported that the vascular injury enhanced vascular remodeling in FGR mice, but the mechanisms are still unclear. Angiotensin II type 2 receptor (AT2R) is relatively highly expressed in fetal mice but not in adult mice. Therefore, we investigated the effects of AT2R in FGR mice, using AT2R knockout (AT2KO) mice. DESIGN AND METHOD: Dams (C57BL/6J strain (WT) mice and AT2KO mice) were fed an isocaloric diet containing 20% protein (normal protein; NP) or 8% protein (low protein; LP) from 10 weeks of age until delivery...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754189/sp-05-2-what-should-be-the-target-blood-pressure-for-ckd-with-overt-proteinuria
#19
Daniel W Jones
Hypertension and Chronic Kidney Disease are both common. The vast majority of patients with chronic kidney disease (CKD) have hypertension. Hypertension can be both a cause and a result of CKD. Many patients with CKD, both diabetic and non-diabetic have overt proteinuria (>300 mg/day). Patients with proteinuria are at higher risk for progression of kidney disease and for atherosclerosis. Because patients with CKD are often excluded from hypertension trials with hard outcomes, there has been until recently less data than ideal to consider in making decisions...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754180/ed-08-4-diagnosis-and-treatment-of-hypertensive-emergency-in-children
#20
Lin Shi
According to the seventh report of Joint National Committee (JNC 7), hypertensive emergency (HE), a kind of hypertensive crisis, is defined as a sudden and abrupt elevation in blood pressure so as to cause acute target organ dysfunctions, including central nervous system, cardiovascular system or kidneys. Patients with HE require immediate reduction in markedly elevated blood pressure. Currently, there are no international guidelines for children HE, so the JNC definition is commonly used. Hypertensive emergency in children is rare but a life-threatening emergency...
September 2016: Journal of Hypertension
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