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angiotensinogen

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https://www.readbyqxmd.com/read/27904154/circadian-rhythm-of-blood-pressure-and-the-renin-angiotensin-system-in-the-kidney
#1
REVIEW
Naro Ohashi, Shinsuke Isobe, Sayaka Ishigaki, Hideo Yasuda
Activation of the intrarenal renin-angiotensin system (RAS) has a critical role in the pathophysiology of the circadian rhythm of blood pressure (BP) and renal injury, independent of circulating RAS. Although it is clear that the circulating RAS has a circadian rhythm, reports of a circadian rhythm in tissue-specific RAS are limited. Clinical studies evaluating intrarenal RAS activity by urinary angiotensinogen (AGT) levels have indicated that urinary AGT levels were equally low during both the daytime and nighttime in individuals without chronic kidney disease (CKD) and that urinary AGT levels were higher during the daytime than at nighttime in patients with CKD...
December 1, 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/27903492/angiotensinogen-import-in-isolated-proximal-tubules-evidence-for-mitochondrial-trafficking-and-uptake
#2
Bryan A Wilson, Nildris Cruz-Diaz, Yixin Su, James C Rose, TanYa M Gwathmey, Mark C Chappell
The renal proximal tubules are a key functional component of the kidney and express the angiotensin precursor angiotensinogen; however, it is unclear the extent that tubular angiotensinogen reflects local synthesis or internalization. Therefore, the current study established the extent that angiotensinogen is internalized by proximal tubules and the intracellular distribution. Proximal tubules were isolated from the kidney cortex of male sheep by enzymatic digestion and a discontinuous Percoll gradient. Tubules were incubated with radiolabeled 125I-angiotensinogen for 2 hrs at 37°C in serum/phenol-free DMEM/F12 media...
November 30, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27900324/low-expression-of-angiotensinogen-and-dipeptidyl-peptidase-1-in-saliva-of-patients-with-proliferative-verrucous-leukoplakia
#3
Isadora Luana Flores, Alan Roger Santos-Silva, Ricardo Della Coletta, Adriana Franco Paes Leme, Marcio Ajudarte Lopes
AIM: To elucidate the profile of the salivary proteome. METHODS: Unstimulated whole mouth saliva was collected from 30 volunteers [15 proliferative verrucous leukoplakia (PVL) patients and 15 controls] and proteins were submitted for mass spectrometry-based proteomics using the discovery approach, followed by analyses of variance and logistic regression tests. RESULTS: A total of two hundred and eighty-three proteins were confidently identified in saliva...
November 16, 2016: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/27894965/an-application-of-mass-spectrometry-for-quality-control-of-biologicals-highly-sensitive-profiling-of-plasma-residuals-in-human-plasma-derived-immunoglobulin
#4
Franck Limonier, Katleen Van Steendam, Geneviève Waeterloos, Koen Brusselmans, Myriam Sneyers, Dieter Deforce
: Thromboembolic events (TEE) associated to trace amounts of plasmatic activated coagulation factor XI (FXIa) in administrated immunoglobulin (Ig) have recently raised concerns and hence there is a need for highly sensitive profiling of residual plasma source proteins. This study aims to consider LC-ESI-QTOF data-dependent acquisition in combination with sample fractionation for this purpose. Sample fractionation proved mandatory to enable identification of plasma residuals. Two approaches were compared: Ig depletion with protein G - protein A affinity chromatography and low-abundant protein enrichment with a combinatorial peptide ligand library (ProteoMiner(TM), Bio-Rad)...
November 25, 2016: Journal of Proteomics
https://www.readbyqxmd.com/read/27891769/exenatide-induces-an-increase-in-vasodilatory-and-a-decrease-in-vasoconstrictive-mediators
#5
Ajay Chaudhuri, Husam Ghanim, Antoine Makdissi, Kelly Green, Sanaa Abuaysheh, Manav Batra, Nitesh Kuhadiya, Paresh Dandona
In view of the known vasodilatory effects of GLP-1, and exenatide, we investigated the effects of exenatide on vasoactive factors. We analyzed blood samples and mononuclear cells (MNC) from a previous study collected after a single dose and following 12 weeks of exenatide or placebo treatment on a series of 24 patients with T2DM. Following exenatide, plasma concentrations of ANP, cGMP, cAMP increased significantly at 12 weeks. Plasma cGMP and adenylate cyclase expression in MNC increased significantly following single dose...
November 28, 2016: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/27853882/the-protective-effect-of-human-atrial-natriuretic-peptide-on-renal-damage-during-cardiac-surgery
#6
Takahiro Moriyama, Shintaro Hagihara, Toko Shiramomo, Misaki Nagaoka, Shohei Iwakawa, Yuichi Kanmura
PURPOSE: Acute kidney injury (AKI) is one of the critical complications after cardiac surgery. In the kidney, angiotensin II (Ang II) is formed by independent mechanisms, and activity of the intrarenal renin-angiotensin-aldosterone (RAAS) system contributes to the progression of kidney damage. Although atrial natriuretic peptide (ANP) exerts protective effects against renal injury by inhibiting the RAAS, the mechanisms of this effect have not been completely clarified. We investigated how human ANP (hANP) could prevent renal damage induced by cardiopulmonary bypass...
November 16, 2016: Journal of Anesthesia
https://www.readbyqxmd.com/read/27818490/corrigendum-structure-and-functions-of-angiotensinogen
#7
Hong Lu, Lisa A Cassis, Craig W Vander Kooi, Alan Daugherty
No abstract text is available yet for this article.
November 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/27816405/atrial-flutter-fibrillation-in-patients-receiving-transcatheter-closure-of-atrial-septal-defect
#8
Shuenn-Nan Chiu, Mei-Hwan Wu, Chia-Ti Tsai, Ling-Ping Lai, Jiunn-Lee Lin, Ming-Tai Lin, Chun-Wei Lu, Jou-Kou Wang
BACKGROUND/PURPOSE: Atrial flutter/fibrillation (AFL/Af) is a common late complication in atrial septal defect (ASD) patients even after occluder implantation. We try to delineate the risk factors of persistent AFL/Af. METHODS: From 1998 to 2010, all patients older than 18 years of age who received ASD occluder implantation in our hospital were enrolled, and their records were retrospectively reviewed. In addition, renin-angiotensin system gene polymorphisms including angiotensinogen gene, A1166C polymorphism on the angiotensin II type I receptor gene, and insertion/deletion (I/D) patterns on the angiotensin-converting enzyme gene were checked using direct sequencing...
November 2, 2016: Journal of the Formosan Medical Association, Taiwan Yi Zhi
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/27801805/urinary-angiotensinogen-could-be-a-prognostic-marker-of-the-renoprotection-of-olmesartan-in-metabolic-syndrome-patients
#10
Tomoko Mizushige, Hiroyuki Kobori, Hirofumi Hitomi, Yoko Nishijima, Fumihiro Tomoda, Satoshi Morimoto, Masakazu Kohno, Akira Nishiyama
This study was performed to demonstrate urinary angiotensinogen as a potential prognostic marker of the albuminuria reduction effects of olmesartan in patients with metabolic syndrome. In 24 patients (eight women, 57.88 ± 2.00 years), 5-40 mg/day of olmesartan were given. Urinary concentrations of albumin and angiotensinogen (normalized by urinary concentrations of creatinine) and plasma renin activity were measured before and after the 12- and 24-week marks of olmesartan treatment. Olmesartan treatment increased plasma renin activity and decreased urinary albumin and urinary angiotensinogen significantly (p < 0...
October 27, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27798196/klotho-suppresses-the-renin-angiotensin-system-in-adriamycin-nephropathy
#11
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/27788506/overexpression-of-intrarenal-renin-angiotensin-system-in-human-acute-tubular-necrosis
#12
Wei Cao, Lingwei Jin, Zhanmei Zhou, Manqiu Yang, Chunyi Wu, Liling Wu, Shuang Cui
BACKGROUND/AIMS: Acute tubular necrosis (ATN), a leading cause of acute kidney injury (AKI), is associated with decreased survival and increased progression of chronic kidney disease. A barrier to improving the clinical outcomes is the incomplete understanding of the pathogenesis of AKI. Our objective is to test the hypothesis that intrarenal renin-angiotensin system (RAS) is overexpressed in patients with ATN and could be an indicator of ATN severity. METHODS: A transversal study was conducted in patients with biopsy-proven ATN...
October 28, 2016: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/27780262/the-specific-%C3%AE-1-adrenergic-receptor-antagonist-prazosin-influences-the-urine-proteome
#13
Mindi Zhao, Jianqiang Wu, Youhe Gao
Urine, reflecting many changes in the body, is a better source than blood for biomarker discovery. However, even under physiological conditions, the urine proteome often varies. Understanding how various regulating factors affect urine proteome helps link changes to urine proteome with urinary biomarkers of physiological conditions as well as corresponding diseases. To evaluate the possible impact of α1-adrenergic receptor on urine proteome, this study investigated effects of the specific inhibitor prazosin on the urine proteome in a rat model by using tandem mass tagging and two-dimensional liquid chromatography-tandem mass spectrometry...
2016: PloS One
https://www.readbyqxmd.com/read/27761002/intrarenal-renin-angiotensin-system-activity-is-augmented-after-initiation-of-dialysis
#14
Naro Ohashi, Shinsuke Isobe, Sayaka Ishigaki, Takahisa Suzuki, Masafumi Ono, Tomoyuki Fujikura, Takayuki Tsuji, Akihiko Kato, Seiichiro Ozono, Hideo Yasuda
Circulating renin-angiotensin system (RAS) activation is maintained after renal function has deteriorated. The activation of the intrarenal RAS plays a critical role in the pathophysiology of chronic kidney disease (CKD), independently of the circulating RAS. However, the activation of intrarenal RAS and the chymase-dependent pathway after initiation of dialysis has not been clarified. We recruited 19 CKD patients (10 without dialysis and 9 with dialysis) who underwent a heminephrectomy. Circulating RAS was investigated before nephrectomy...
October 20, 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
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/27754128/os-25-03-overexpression-of-heterogeneous-nuclear-ribonucleoprotein-f-prevents-systemic-hypertension-and-kidney-injury-and-normalizes-renal-renin-angiotensin-system-genes-expression-in-type-2-diabetic-db-db-transgenic-mice
#16
John Chan, Chao-Sheng Lo, Yixuan Shi, Isabelle Chenier, Shao-Ling Zhang
OBJECTIVE: We aimed to investigate whether overexpression of heterogeneous nuclear ribonucleoprotein F (HnRNP F, a transcription factor) in renal proximal tubular cells (RPTCs) prevents systemic hypertension and kidney injury in type 2 diabetic db/db transgenic (Tg) mice and study its underlying mechanism (s) of action. DESIGN AND METHOD: Db/db hnRNP F-Tg mice (BKS strain) were generated by cross-breeding of db/m + mice with Tg mice specifically overexpressing HnRNP F in their RPTCs using kidney-specific androgen-regulated protein promoter (KAP2)...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754085/os-19-08-the-activated-intrarenal-renin-angiotensin-systems-and-oxidative-stress-in-tubular-can-be-the-original-mechanism-of-renal-damage-in-primary-aldosteronism
#17
Yoshitsugu Iwakura, Ryo Morimoto, Kumi Kikuchi, Yoshikiyo Ono, Yuta Tezuka, Yasuko Tsukada, Masahiro Nezu, Yasuhiro Igarashi, Masataka Kudo, Akira Nishiyama, Sadayoshi Ito, Fumitoshi Satoh
OBJECTIVE: High prevalence of renal damage has been demonstrated in patients with primary aldosteronism (PA). However, the original mechanism and onset still be elucidated. The purpose of this study is to investigate the possible original mechanisms of renal damages in PA. DESIGN AND METHOD: Consecutive 72 patients with aldosterone producing adenoma (APA) and 70 patients with essential hypertension (EH) participated. No patients had renal damages defined as eGFR (based on Cystatin C) < 60 ml/min/1...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754057/os-15-05-hepatocyte-nuclear-factor-5-acts-as-a-glucose-responsive-element-of-human-angiotensinogen-promoter
#18
Juan Wang, Hiroyuki Kobori, Yuki Shibayama, Daisuke Nakano, Hirofumi Hitomi, Akira Nishiyama
OBJECTIVE: Previous studies have shown that angiotensinogen (AGT) synthesis is enhanced by high glucose (HG) in rat renal proximal tubular cells. We aimed to investigate the glucose-responsive elements within human AGT (hAGT) promoter in human immortalized proximal tubular HK-2 cells. DESIGN AND METHOD: HK-2 cells were treated with normal glucose (NG: 5.5 mmol/L) and high glucose (HG: 15 mmol/L). Human AGT promoter region was cloned from -4358 to +122. Consecutive 5'-end deletion mutant constructs and different site-direct mutagenesis products were transfected into HK-2, followed by promoter activity measurement by dual luciferase assay...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754029/yia-03-05-blood-pressure-reduction-and-different-c-ebp%C3%AE-dna-binding-pattern-in-telmisartan-treated-angiotensinogen-g-217a-polymorphism-hypertensive-patients
#19
Risa Ramadhiani, Muhammad Saifur Rohman, Nashi Widodo, Valerinna Y S Putri, Mifetika Lukitasari, Jayarani F Putri, Didik H Utomo
OBJECTIVE: To investigate whether the angiotensinogen (AGT) G-217A polymorphism affects blood pressure response of telmisartan and valsartan in hypertensive patients. DESIGN AND METHOD: A total of 46 primary hypertensive patients, 23 patients received telmisartan 80 mg and 23 patients received valsartan 160 mg, were observed and followed up for 4 months. The AGT G-217A polymorphism was determined by PCR-RFLP and direct sequencing method. Blood pressure response was measured daytime (6 am - 10 pm), night-time (10 pm - 6 am), and 24 hours using twenty-four hours ambulatory blood pressure monitoring (ABPM)...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27753985/sy-09-3-role-of-intrarenal-ras-in-the-pathogenesis-of-salt-dependent-hypertension
#20
Akira Nishiyama
The renin-angiotensin system (RAS) plays a critical role in the regulation of blood pressure and body fluid homeostasis. In addition to its physiological roles, angiotensin II (AngII) induces inflammation, cell growth, mitogenesis, apoptosis, migration, and differentiation, regulates the gene expression of bioactive substances, and activates multiple intracellular signaling pathways, all of which contribute to renal tissue injuries. In the kidney, all of the RAS components are present and intrarenal AngII is formed by independent multiple mechanisms...
September 2016: Journal of Hypertension
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