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https://www.readbyqxmd.com/read/29242099/downregulation-of-circulating-mots-c-levels-in-patients-with-coronary-endothelial-dysfunction
#1
Qing Qin, Silvia Delrio, Junxiang Wan, R Jay Widmer, Pinchas Cohen, Lilach O Lerman, Amir Lerman
BACKGROUND: MOTS-c is one of the newly identified mitochondrial-derived peptides which play a role in regulating metabolic homeostasis. The current study aimed to investigate whether circulating MOTS-c levels are also associated with endothelial dysfunction(ED) in patients without significant structural coronary lesions. METHODS: Forty patients undergoing coronary angiography and endothelial function testing for clinical indications of recurrent angina with no structural coronary lesions were included in the study...
December 6, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29240958/short-and-long-term-effects-of-hemodialysis-on-platelet-and-monocyte-activity-markers-of-atherosclerosis-in-patients-with-end-stage-renal-disease
#2
Urs Benck, Ksenija Stach, Susanne Jung, Bernhard K Krämer, Thorsten Kälsch, Anna-Isabelle Kälsch
BACKGROUND: In hemodialysis (HD) patients cardiovascular events represent the predominant cause of mortality. Since platelet and monocyte activity markers play an important role in cardiovascular mortality, this study assessed the influence of HD on these markers. METHODS: 41 HD patients (25 male, 16 female) were included. Blood samples were obtained before and after a single HD session at baseline and again after an elapsed period of 114  21 days (91-175 days) on maintenance hemodialysis...
December 14, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/29238217/effects-of-voluntary-exercise-on-blood-pressure-angiotensin-ii-aldosterone-and-renal-function-in-two-kidney-one-clip-hypertensive-rats
#3
Brian M Waldman, Robert A Augustyniak, Haiping Chen, Noreen F Rossi
Spontaneous dynamic exercise promotes sympathoinhibition and decreases arterial pressure in two-kidney, one-clip (2K-1C) hypertensive rats. Renal sympathetic nerves stimulate renin secretion and increase renal tubular sodium reabsorption. We hypothesized that daily voluntary wheel running exercise by 2K-1C rats will decrease mean arterial pressure (MAP), plasma angiotensin II (Ang II), and aldosterone as well as normalize urinary sodium and potassium excretion independent of changes in glomerular filtration rate (GFR)...
2017: Integrated Blood Pressure Control
https://www.readbyqxmd.com/read/29233907/glucagon-like-peptide-1-acutely-affects-renal-blood-flow-and-urinary-flow-rate-in-spontaneously-hypertensive-rats-despite-significantly-reduced-renal-expression-of-glp-1-receptors
#4
Jonas Ronn, Elisa P Jensen, Nicolai J Wewer Albrechtsen, Jens Juul Holst, Charlotte M Sorensen
Glucagon-like peptide-1 (GLP-1) is an incretin hormone increasing postprandial insulin release. GLP-1 also induces diuresis and natriuresis in humans and rodents. The GLP-1 receptor is extensively expressed in the renal vascular tree in normotensive rats where acute GLP-1 treatment leads to increased mean arterial pressure (MAP) and increased renal blood flow (RBF). In hypertensive animal models, GLP-1 has been reported both to increase and decrease MAP. The aim of this study was to examine expression of renal GLP-1 receptors in spontaneously hypertensive rats (SHR) and to assess the effect of acute intrarenal infusion of GLP-1...
December 2017: Physiological Reports
https://www.readbyqxmd.com/read/29233018/type-1-diabetic-patients-have-better-endothelial-function-after-simultaneous-pancreas-kidney-transplantation-than-after-kidney-transplantation-with-continued-insulin-therapy
#5
Jacek Ziaja, Adrian P Kowalik, Aureliusz Kolonko, Dorota Kamińska, Aleksander J Owczarek, Agata Kujawa-Szewieczek, Mariusz A Kusztal, Joanna Badura, Dominika Bożek-Pająk, Piotr Choręza, Agnieszka Zakrzewska, Robert Król, Stefan Chłopicki, Marian Klinger, Andrzej Więcek, Jerzy Chudek, Lech Cierpka
The purpose of this study was to analyse the influence of simultaneous pancreas-kidney or kidney transplantation on endothelial function and systemic inflammation in type 1 diabetic patients with end-stage renal disease. In 39 simultaneous pancreas-kidney, 39 type 1 diabetic kidney and 52 non-diabetic kidney recipients, flow-mediated dilatation was measured. Additionally, blood glycated haemoglobin, serum creatinine and lipids, plasma nitrites [Formula: see text] and nitrates, asymmetric dimethylarginine, soluble vascular cell adhesion molecule-1, intercellular adhesion molecule-1, and E-selectin, high-sensitivity C-reactive protein, tumour necrosis factor-α, interleukin 1β and interleukin 6 concentrations were assessed...
December 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/29225917/role-of-p-glycoprotein-on-cd69-cd4-cells-in-the-pathogenesis-of-proliferative-lupus-nephritis-and-non-responsiveness-to-immunosuppressive-therapy
#6
Shizuyo Tsujimura, Tomoko Adachi, Kazuyoshi Saito, Yoshiya Tanaka
Introduction: P-glycoprotein (P-gp) expression on activated lymphocytes in systemic lupus erythematosus (SLE) plays a role in active efflux of intracellular drugs, resulting in drug resistance. The role of P-gp-expressing lymphocytes in the pathogenesis of SLE remains unclear. The aim of this study was to determine the importance of P-gp+CD4+ cells in organ manifestations in refractory SLE. Methods: The proportion of P-gp+CD4+ cells was determined by flow cytometry in peripheral blood of patients with SLE (n=116) and healthy adults (n=10)...
2017: RMD Open
https://www.readbyqxmd.com/read/29218620/the-impact-of-injector-based-contrast-agent-administration-in-time-resolved-mra
#7
Johannes Budjan, Ulrike I Attenberger, Stefan O Schoenberg, Hubertus Pietsch, Gregor Jost
OBJECTIVES: Time-resolved contrast-enhanced MR angiography (4D-MRA), which allows the simultaneous visualization of the vasculature and blood-flow dynamics, is widely used in clinical routine. In this study, the impact of two different contrast agent injection methods on 4D-MRA was examined in a controlled, standardized setting in an animal model. METHODS: Six anesthetized Goettingen minipigs underwent two identical 4D-MRA examinations at 1.5 T in a single session...
December 7, 2017: European Radiology
https://www.readbyqxmd.com/read/29212760/large-scale-molecular-dynamics-simulation-of-coupled-dynamics-of-flow-and-glycocalyx-towards-understanding-atomic-events-on-an-endothelial-cell-surface
#8
Xi Zhuo Jiang, Haipeng Gong, Kai Hong Luo, Yiannis Ventikos
The glycocalyx has a prominent role in orchestrating multiple biological processes occurring at the plasma membrane. In this paper, an all-atom flow/glycocalyx system is constructed with the bulk flow velocity in the physiologically relevant ranges for the first time. The system is simulated by molecular dynamics using 5.8 million atoms. Flow dynamics and statistics in the presence of the glycocalyx are presented and discussed. Complex dynamic behaviours of the glycocalyx, particularly the sugar chains, are observed in response to blood flow...
December 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29210064/normothermic-machine-perfusion-for-the-assessment-and-transplantation-of-declined-human-kidneys-from-donation-after-circulatory-death-donors
#9
S A Hosgood, E Thompson, T Moore, C H Wilson, M L Nicholson
BACKGROUND: A significant proportion of donation after circulatory death (DCD) kidneys are declined for transplantation because of concerns over their quality. Ex vivo normothermic machine perfusion (NMP) provides a unique opportunity to assess the quality of a kidney and determine its suitability for transplantation. METHODS: In phase 1 of this study, declined human DCD kidneys underwent NMP assessment for 60 min. Kidneys were graded 1-5 using a quality assessment score (QAS) based on macroscopic perfusion, renal blood flow and urine output during NMP...
December 6, 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/29209891/renal-response-to-anaphylaxis-in-anesthetized-rats-and-isolated-perfused-rat-kidneys-roles-of-nitric-oxide
#10
Kiyotaka Mukai, Yuhichi Kuda, Toshishige Shibamoto, Mamoru Tanida, Yasutaka Kurata, Hitoshi Yokoyama
We determined the renal responses to anaphylaxis and the effects of a nitric oxide synthesis inhibitor, L-NAME, in anesthetized rats and isolated perfused rat kidneys. After the ovalbumin antigen injection, the sensitized rats showed transient and substantial decreases in mean blood pressure and renal blood flow and an increase in renal vascular resistance. Creatinine clearance, a measure of renal function, decreased to 53% baseline at 2 h after antigen. L-NAME pretreatment significantly enhanced the antigen-induced renal vasoconstriction and renal dysfunction...
December 5, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29202728/non-tunneled-versus-tunneled-dialysis-catheters-for-acute-kidney-injury-requiring-renal-replacement-therapy-a-prospective-cohort-study
#11
Mallika L Mendu, Megan F May, Arnaud D Kaze, Dionne A Graham, Salena Cui, Margaret E Chen, Naomi Shin, Ayal A Aizer, Sushrut S Waikar
BACKGROUND: Acute kidney injury requiring renal replacement therapy (AKI-RRT) is associated with high morbidity, mortality and resource utilization. The type of vascular access placed for AKI-RRT is an important decision, for which there is a lack of evidence-based guidelines. METHODS: We conducted a prospective cohort study over a 16-month period with 154 patients initiated on AKI-RRT via either a non-tunneled dialysis catheter (NTDC) or a tunneled dialysis catheter (TDC) at an academic hospital...
December 4, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/29193160/multicenter-experience-with-mechanical-circulatory-support-using-a-new-diagonal-pump-in-233-children
#12
Brigitte Stiller, Robert Jan Houmes, André Rüffer, Matthias Kumpf, Andreas Müller, Florian Kipfmüller, Harald Köditz, Susanne Herber Jonat, Claudia Schmoor, Christoph Benk, Dick Tibboel, Thilo Fleck
Technological innovations in pediatric extracorporeal life support circuits can reduce system-related complications and may improve patients' outcome. The Deltastream DP3 (Medos Medizintechnik AG, Stolberg, Germany) is a novel rotational pump with a diagonally streamed impeller that can be used over a broad range of flows. We collected patient data from seven pediatric centers to conduct a retrospective cohort study. We examined 233 patients whose median age was 1.9 (0-201) months. The DP3 system was used for cardiopulmonary support as veno-arterial extracorporeal membrane oxygenation (ECMO) in 162 patients...
November 29, 2017: Artificial Organs
https://www.readbyqxmd.com/read/29191553/amp-and-adenosine-are-both-ligands-for-adenosine-2b-receptor-signaling
#13
Jessica K Holien, Benjamin Seibt, Veena Roberts, Evelyn Salvaris, Michael W Parker, Peter J Cowan, Karen M Dwyer
Adenosine is considered the canonical ligand for the adenosine 2B receptor (A2BR). A2BR is upregulated following kidney ischemia augmenting post ischemic blood flow and limiting tubular injury. In this context the beneficial effect of A2BR signaling has been attributed to an increase in the pericellular concentration of adenosine. However, following renal ischemia both kidney adenosine monophosphate (AMP) and adenosine levels are substantially increased. Using computational modeling and calcium mobilization assays, we investigated whether AMP could also be a ligand for A2BR...
November 20, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29190218/validation-of-a-real-time-minute-to-minute-urine-output-monitor-and-the-feasibility-of-its-clinical-use-for-patients-undergoing-cardiac-surgery
#14
Aaron J Chang, Yohei Nomura, Viachaslau M Barodka, Daijiro Hori, Jonathan T Magruder, Nevin M Katz, Dan E Berkowitz, Charles W Hogue
Acute kidney injury after cardiac surgery is associated with increased morbidity and mortality. Methods for measuring urine output in real time may better ensure renal perfusion perioperatively in contrast to the current standard of care where urine output is visually estimated after empiric epochs of time. In this study, we describe an accurate method for monitoring urine output continuously during cardiopulmonary bypass. This may provide a means for setting patient-specific targets for blood pressure and cardiopulmonary bypass flow as a potential strategy to reduce the risk for acute kidney injury...
December 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29183138/-experimental-model-for-cardiogenic-shock-with-pericardial-tamponade
#15
Gábor Bari, Szilárd Szűcs, Dániel Érces, Melinda Ugocsai, Noémi Bozsó, Dóra Balog, Mihály Boros, Gabriella Varga
INTRODUCTION: Pericardial tamponade (PT) is a life-threatening condition, with low cardiac output. The hemodynamic consequences of PT can severely affect the circulation of all tissues, including the microcirculation of the kidneys and the intestinal mucosa. Our aim was to develop a hemodynamically stable and controllable large animal model of PT to study the consequences of cardiogenic shock. METHODS: Two groups of anesthetized vietnamese minipigs (n = 6, both groups) were used...
December 2017: Magyar Sebészet
https://www.readbyqxmd.com/read/29178536/effects-of-an-energy-restricted-low-carbohydrate-high-unsaturated-fat-low-saturated-fat-diet-versus-a-high-carbohydrate-low-fat-diet-in-type-2-diabetes-a-2-year-randomized-clinical-trial
#16
Jeannie Tay, Campbell H Thompson, Natalie D Luscombe-Marsh, Thomas P Wycherley, Manny Noakes, Jonathan D Buckley, Gary A Wittert, William S Yancy, Grant D Brinkworth
AIM: To examine whether a low-carbohydrate, high unsaturated/low saturated fat diet (LC) improves glycemic control and cardiovascular disease (CVD) risk factors in overweight and obese patients with type 2 diabetes (T2D). METHODS: 115 adults with T2D (mean[SD]; BMI:34.6[4.3]kg/m2 , age:58[7]yrs, HbA1c:7.3[1.1]%) were randomized to one of two planned energy-matched, hypocaloric diets combined with aerobic/resistance exercise (1hr,3d/wk) for 2 years:(1) LC:14% energy as carbohydrate, 28% protein, 58% fat [<10% saturated fat]) or (2) low fat, high-carbohydrate, low glycemic index diet (HC):53% CHO, 17% protein, 30% fat [<10% saturated fat])...
November 27, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29172798/physiology-of-blood-pressure-relevant-to-managing-hypertension-in-pregnancy
#17
Nnabuike C Ngene, Jagidesa Moodley
PURPOSE: Pregnancy causes physiological changes in maternal organ systems, and blood pressure (BP) is one of the variables affected. This review is focusing on the physiology of BP relevant to the management of hypertension in pregnancy. MATERIALS AND METHODS: A detailed literature search was performed using electronic databases (including WorldCat, PubMed, MEDLINE, Google Scholar) to retrieve and review reports related to physiology of BP in pregnancy. RESULTS: During pregnancy, there is vasodilation caused by mediators such as increased levels of progesterone and nitric oxide...
November 27, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29170512/generation-of-interspecies-limited-chimeric-nephrons-using-a-conditional-nephron-progenitor-cell-replacement-system
#18
S Yamanaka, S Tajiri, T Fujimoto, K Matsumoto, S Fukunaga, B S Kim, H J Okano, T Yokoo
Animal fetuses and embryos may have applications in the generation of human organs. Progenitor cells may be an appropriate cell source for regenerative organs because of their safety and availability. However, regenerative organs derived from exogenous lineage progenitors in developing animal fetuses have not yet been obtained. Here, we established a combination system through which donor cells could be precisely injected into the nephrogenic zone and native nephron progenitor cells (NPCs) could be eliminated in a time- and tissue-specific manner...
November 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/29169037/a-nephron-model-for-study-of-drug-induced-acute-kidney-injury-and-assessment-of-drug-induced-nephrotoxicity
#19
Yueyang Qu, Fan An, Yong Luo, Yao Lu, Tingjiao Liu, Weijie Zhao, Bingcheng Lin
In this study, we developed a multilayer microfluidic device to simulate nephron, which was formed by "glomerulus", "Bowman's capsule", "proximal tubular lumen" and "peritubular capillary". In this microdevice, artificial renal blood flow was circulating and glomerular filtrate flow was single passing through, mimicking the behavior of a nephron. In this dynamic artificial nephron, we observed typical renal physiology, including the glomerular size-selective barrier, glomerular basement membrane charge-selective barrier, glucose reabsorption and para-aminohippuric acid secretion...
November 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/29164555/an-insight-into-the-role-of-cyclooxygenase-and-lipooxygenase-pathway-in-renal-ischemia
#20
M Kinra, J Mudgal, D Arora, M Nampoothiri
OBJECTIVE: Renal ischemia (RI) is a clinical condition that occurs due to marked decrease in renal blood flow. The pathophysiology of RI is interlinked with atherosclerotic renal artery stenosis, infarction, organ transplantation and sepsis. The mechanism of RI injury depends on various factors such as inflammatory response, oxidative stress and apoptosis. In this review, we evaluate the role of cyclooxygenase and lipoxygenase in modulating the process of ischemic renal injury. MATERIALS AND METHODS: This is a literature review of articles published on PubMed and Web of Science in English...
November 2017: European Review for Medical and Pharmacological Sciences
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