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https://www.readbyqxmd.com/read/28428931/the-role-of-renal-proximal-tubule-transport-in-the-regulation-of-blood-pressure
#1
REVIEW
Shoko Horita, Motonobu Nakamura, Masashi Suzuki, Nobuhiko Satoh, Atsushi Suzuki, Yukio Homma, Masaomi Nangaku
The electrogenic sodium/bicarbonate cotransporter 1 (NBCe1) on the basolateral side of the renal proximal tubule plays a pivotal role in systemic acid-base homeostasis. Mutations in the gene encoding NBCe1 cause severe proximal renal tubular acidosis accompanied by other extrarenal symptoms. The proximal tubule reabsorbs most of the sodium filtered in the glomerulus, contributing to the regulation of plasma volume and blood pressure. NBCe1 and other sodium transporters in the proximal tubule are regulated by hormones, such as angiotensin II and insulin...
March 2017: Kidney Research and Clinical Practice
https://www.readbyqxmd.com/read/28427449/urolithiasis-analysis-in-a-multiethnic-population-at-a-tertiary-hospital-in-nairobi-kenya
#2
Francis K Wathigo, Alfred Hayombe, Daniel Maina
BACKGROUND: Urolithiasis is a global problem whose incidence is reported to be on the rise across the world. Previously, urolithiasis was reported as being rare among the indigenous African population but recent data suggest otherwise. This study reviewed the demographic and clinical characteristics of patients with urolithiasis seen at the Aga Khan University hospital Nairobi (AKUHN) as well as the chemical composition of the stones and the modalities of therapy used. METHODS: This was a retrospective study which utilized patients' clinical and laboratory records from 2013 to 2014...
April 20, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28406701/prompt-rise-in-urinary-ammonium-excretion-suffices-to-mitigate-metabolic-acidosis-in-an-experimental-animal-model-of-severe-normovolemic-hemodilution
#3
J K Teloh, I N Waack, H de Groot
Recently, we have established a model of severe stepwise normovolemic hemodilution to a hematocrit of 10% in rats employing three different colloidal volume replacement solutions (Voluven, Volulyte and Gelafundin) that are routinely used in clinical practice at present. We did not see severe dilutional acidosis as to be expected, but a decline in urinary pH. We here looked on further mechanisms of renal acid excretion during normovolemic hemodilution. Bicarbonate, which had been removed during normovolemic hemodilution, was calculated with the help of the Henderson-Hasselbalch equation...
April 12, 2017: Physiological Research
https://www.readbyqxmd.com/read/28399414/laboratory-and-clinical-predictors-of-30-day-survival-for-patients-on-extracorporeal-membrane-oxygenation-ecmo-8-year-experience-at-albert-einstein-college-of-medicine-montefiore-medical-center
#4
Ivo M B Francischetti, James Szymanski, Daniel Rodriguez, Moonseong Heo, Lucia R Wolgast
PURPOSE: Survival of patients on ECMO has remained stable in every population. Laboratory values predictors of survival are required to improve patient care. MATERIALS AND METHODS: Clinical Looking Glass software was used to assess Electronic Medical Records (EMRs) of patients at Albert Einstein College of Medicine, Montefiore Medical Center (2007-2014). RESULTS: Our population comprises of 166 adults and was divided in survivors and non-survivors, within 30days...
March 31, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28385806/urine-ammonium-predicts-clinical-outcomes-in-hypertensive-kidney-disease
#5
Kalani L Raphael, David J Carroll, Jennifer Murray, Tom Greene, Srinivasan Beddhu
Metabolic acidosis is associated with poor outcomes in CKD. Because impaired renal ammonium excretion is important in the pathogenesis of acidosis, urine ammonium excretion might be a better and perhaps earlier acid-base indicator of risk than serum bicarbonate, particularly in patients without acidosis. We evaluated the association between baseline ammonium excretion and clinical outcomes in African American Study of Kidney Disease and Hypertension participants (n=1044). Median daily ammonium excretion was 19...
April 6, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28385297/renal-tubular-nhe3-is-required-in-the-maintenance-of-water-and-sodium-chloride-homeostasis
#6
Robert A Fenton, Søren B Poulsen, Samantha de la Mora Chavez, Manoocher Soleimani, Jessica A Dominguez Rieg, Timo Rieg
The sodium/proton exchanger isoform 3 (NHE3) is expressed in the intestine and the kidney, where it facilitates sodium (re)absorption and proton secretion. The importance of NHE3 in the kidney for sodium chloride homeostasis, relative to the intestine, is unknown. Constitutive tubule-specific NHE3 knockout mice (NHE3(loxloxCre)) did not show significant differences compared to control mice in body weight, blood pH or bicarbonate and plasma sodium, potassium, or aldosterone levels. Fluid intake, urinary flow rate, urinary sodium/creatinine, and pH were significantly elevated in NHE3(loxloxCre) mice, while urine osmolality and GFR were significantly lower...
April 3, 2017: Kidney International
https://www.readbyqxmd.com/read/28361424/role-of-prolactin-in-the-regulation-of-bicarbonates-biodynamics-in-female-rat-model-of-cholestasis-of-pregnancy
#7
O A Bulaeva, P A Abramicheva, T A Balakina, O V Smirnova
We studied possible involvement of prolactin in the regulation of bicarbonate biodynamics using female rat model of cholestasis of pregnancy induced by transplantation of the donor pituitary under the renal capsule of a recipient (hyperprolactinemia) and bile duct ligation (cholestasis). The concentration of bicarbonates in the bile and blood, their excretion, clearance, and reabsorption, as well as glomerular filtration rate and excretion of sodium ions were assessed. It was found that the main effect of prolactin was directed to the kidney-regulated pool of bicarbonates and consisted in stimulation of their clearance and inhibition of reabsorption, which led to a decrease in bicarbonate blood concentration...
March 31, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28348100/effects-of-conversion-to-a-bicarbonate-lactate-buffered-neutral-ph-low-gdp-pd-regimen-in-prevalent-pd-a-2-year-randomized-clinical-trial
#8
Karima Farhat, Caroline Douma, Evelina Ferrantelli, Pieter M Ter Wee, Robert H Beelen, Frans J van Ittersum
♦ Background: The use of pH-neutral peritoneal dialysis (PD) fluids low in glucose degradation products (GDP) may better preserve the peritoneal membrane and have fewer systemic effects. The effects of conversion from conventional to neutral-pH, low-GDP PD fluids in prevalent patients are unclear. Few studies on the role of neutral-pH, low-GDP PD have studied residual renal function, ultrafiltration, peritonitis incidence and technique failure, transport characteristics, and local and systemic markers of inflammation in prevalent PD patients...
March 27, 2017: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/28299023/the-effect-of-osmotherapy-and-tight-control-of-acidosis-on-early-graft-function-among-deceased-donor-kidney-transplant-recipients-a-randomized-controlled-trial
#9
F Etezadi, A H Najafi Abrandabadi, J Motaharinia, M Mojtahedzadeh, P Pourfakhr, M R Khajavi, S Gooran, R Shariat Moharari, S Dehghani
BACKGROUND: Reperfusion injury and the acid-base status of the transplant are important factors affecting post-transplantation graft function. OBJECTIVE: We hypothesized that infusing hypertonic saline (HS) or tight control of acid-base status of the blood rushing through renal graft using sodium bicarbonate may have beneficial effects on early graft function. METHODS: Candidates for deceased-donor kidney transplant were randomized into three groups...
2017: International Journal of Organ Transplantation Medicine
https://www.readbyqxmd.com/read/28288246/acute-kidney-injury-in-children-with-type-1-diabetes-hospitalized-for-diabetic-ketoacidosis
#10
Brenden E Hursh, Rebecca Ronsley, Nazrul Islam, Cherry Mammen, Constadina Panagiotopoulos
Importance: Acute kidney injury (AKI) in children is associated with poor short-term and long-term health outcomes; however, the frequency of AKI in children hospitalized for diabetic ketoacidosis (DKA) has not been previously examined. Objectives: To determine the proportion of children hospitalized for DKA who develop AKI and to identify the associated clinical and biochemical markers of AKI. Design, Setting, and Participants: This medical record review of all DKA admissions from September 1, 2008, through December 31, 2013, was conducted at British Columbia Children's Hospital, the tertiary pediatric hospital in British Columbia, Canada...
March 13, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28197045/experiences-with-continuous-venovenous-hemofiltration-using-18mmol-l-predilution-citrate-anticoagulation-and-a-phosphate-containing-replacement-solution
#11
Yuen Henry Jeffrey, Shum Hoi-Ping, Anne Leung Kit Hung, Lam Chung-Ling, Yan Wing-Wa, Lai King-Yiu
CONTEXT: Regional citrate anticoagulation for continuous renal replacement therapy is associated with a longer filter-life, less bleeding events and improved mortality. Problems associated with using Prismocitrate 10/2 solution in continuous renal replacement therapy, include hypomagnesemia, hypophosphatemia and the need for additional bicarbonate infusion. AIMS: This study uses the new Prismocitrate 18/0 solution for improved buffer balance and Phoxilium solution for a more favourable electrolyte profile...
January 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28191541/metabolic-acidosis-status-and-mortality-in-patients-on-the-end-stage-of-renal-disease
#12
Vaia D Raikou
BACKGROUND AND OBJECTIVES: Uncorrected metabolic acidosis leads to higher death risk in dialysis patients. We observed the relationship between metabolic acidosis status and mortality rate in patients on renal replacement therapy during a median follow up time of 60 months. METHODS: We studied 76 patients on an on-line hemodiafiltration. The dialysis adequacy was defined by Kt/V for urea. The Framingham risk score (FRS) points were used to determine the 10-year risk for coronary heart disease...
December 1, 2016: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/28188168/metformin-associated-lactic-acidosis-treated-with-continuous-renal-replacement-therapy
#13
Akihide Nakamura, Kei Suzuki, Hiroshi Imai, Naoyuki Katayama
Metformin-associated lactic acidosis (MALA) is a rare but life-threatening complication. We report a case of MALA in a man aged 71 years who was treated with continuous renal replacement therapy (CRRT). The patient was brought to the hospital for prolonged and gradual worsening gastrointestinal symptoms. Although he received intravenous treatment, he developed catecholamine-resistant shock, and blood gas analysis revealed lactic acidosis. Bicarbonate and antibiotics for possible sepsis were initiated, but with no clear benefit...
February 10, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28181941/sodium-bicarbonate-versus-sodium-chloride-for-preventing-contrast-associated-acute-kidney-injury-in-critically-ill-patients-a-randomized-controlled-trial
#14
Xavier Valette, Isabelle Desmeulles, Benoit Savary, Romain Masson, Amélie Seguin, Bertrand Sauneuf, Jennifer Brunet, Pierre Verrier, Véronique Pottier, Marie Orabona, Désiré Samba, Gérald Viquesnel, Mathilde Lermuzeaux, Pascal Hazera, Jean-Jacques Dutheil, Jean-Luc Hanouz, Jean-Jacques Parienti, Damien du Cheyron
OBJECTIVES: To test whether hydration with bicarbonate rather than isotonic sodium chloride reduces the risk of contrast-associated acute kidney injury in critically ill patients. DESIGN: Prospective, double-blind, multicenter, randomized controlled study. SETTING: Three French ICUs. PATIENTS: Critically ill patients with stable renal function (n = 307) who received intravascular contrast media. INTERVENTIONS: Hydration with 0...
April 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28152653/chronic-kidney-disease-progression-a-retrospective-analysis-of-3-year-adherence-to-a-low-protein-diet
#15
Felipe Rizzetto, Viviane de Oliveira Leal, Leonardo Soares Bastos, Denis Fouque, Denise Mafra
The potential benefits and dangers of dietary protein restriction in chronic kidney disease (CKD) are still controversial. Thus, the aim of this study is to evaluate the effect of low protein diet (LPD) on the renal function in nondialysis CKD patients. A retrospective study was conducted from 321 nondialysis CKD patient's medical files (65.1 ± 12.7 yrs, 58.2% men). These patients received individualized dietary protein prescription (0.6-0.8 g protein/kg/day). Protein intake was evaluated by food diary and 24 h-food recall...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28149822/a-profile-of-metabolic-acidosis-in-patients-with-sepsis-in-an-intensive-care-unit-setting
#16
Kartik Ganesh, R N Sharma, Jaicob Varghese, M G K Pillai
CONTEXT: Metabolic acidosis is frequently found in patients with severe sepsis. An understanding of types of acidosis in sepsis and their evolution over the course of treatment may give us insight into the behavior of acid-base balance in these patients. AIMS: To describe at Intensive Care Unit (ICU) admission and over the first 5 days the composition of metabolic acidosis in patients with sepsis and to evaluate and compare acidosis patterns in survivors and nonsurvivors...
October 2016: International Journal of Critical Illness and Injury Science
https://www.readbyqxmd.com/read/28137731/clinical-presentation-autopsy-results-and-toxicology-findings-in-an-acute-n-ethylpentylone-fatality
#17
Phoutthasone Thirakul, Laura S Hair, Kirstin L Bergen, Julia M Pearson
The clinical presentation, autopsy findings and toxicology results in an acute fatality involving N-ethylpentylone, a new cathinone derivative, are described. Law enforcement transported a male who was agitated and exhibiting unusual behavior to a local hospital. Upon arrival at the hospital, his body temperature was 105.5 degrees Fahrenheit and his blood pH was 6.7. Clinical laboratory analysis revealed elevated troponins, rhabdomyolysis, hypoglycemia, hepatic and renal injury, respiratory failure and disseminated intravascular coagulation...
May 1, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/28134407/-metformin-associated-lactic-acidosis-and-acute-kidney-injury
#18
Paolo Greco, Giuseppe Regolisti, Riccardo Antoniotti, Caterina Maccari, Elisabetta Parenti, Silvia Corrado, Enrico Fiaccadori
Metformin is recommended as the treatment of choice in patients with type 2 diabetes mellitus because of its efficacy, general tolerability and low cost. Recent guidelines have extended the use of metformin to patients with Chronic Kidney Disease (CKD) up to stage III. However, in the recent literature, cases of MALA (metformin-associated lactic acidosis) are increasingly reported. MALA is the most dangerous side effect of the drug, with an incidence rate of 2-9 cases per 100000 person-years of exposure. We report on two patients with accidental metformin overdose, severe lactic acidosis and acute kidney injury...
November 2016: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/28127482/successful-management-of-refractory-type-1-renal-tubular-acidosis-with-amiloride
#19
Patrick Oguejiofor, Robert Chow, Kenneth Yim, Bernard G Jaar
A 28-year-old female with history of hypothyroidism, Sjögren's Syndrome, and Systemic Lupus Erythematosus (SLE) presented with complaints of severe generalized weakness, muscle pain, nausea, vomiting, and anorexia. Physical examination was unremarkable. Laboratory test showed hypokalemia at 1.6 mmol/l, nonanion metabolic acidosis with HCO3 of 11 mmol/l, random urine pH of 7.0, and urine anion gap of 8 mmol/l. CT scan of the abdomen revealed bilateral nephrocalcinosis. A diagnosis of type 1 RTA likely secondary to Sjögren's Syndrome was made...
2017: Case Reports in Nephrology
https://www.readbyqxmd.com/read/28117137/reducing-the-dietary-acid-load-how-a-more-alkaline-diet-benefits-patients-with-chronic-kidney-disease
#20
REVIEW
Caroline Passey
It has been proposed that a low-protein diet will slow progression of chronic kidney disease although studies have not always supported this belief. The accepted practice is that 60% to 70% of protein comes from high biological value (HBV) protein, but this limits patient choice and patients struggle to follow the diet. When a diet with only 30% HBV protein was trialed, there was a significant increase in serum bicarbonate, and patients preferred the diet. The dietary advice given in predialysis clinics was changed...
May 2017: Journal of Renal Nutrition
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