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urea excretion

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https://www.readbyqxmd.com/read/28805887/characterizing-ammonia-emissions-from-horses-fed-different-crude-protein-concentrations
#1
J Weir, H Li, L K Warren, E Macon, C Wickens
Evaluating impact of animal agriculture on air quality has been the focus of recent research. Ammonia (NH) volatilization occurs when undigested protein in feces and urea in urine is broken down by bacteria and enzymes. Information regarding NH emission from equine facilities is limited, and effects of CP intake on NH emissions have not been investigated. Nine mature geldings were used in a 3 × 3 replicated Latin square design study to determine effects of dietary CP on potential NH losses from feces and urine...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28794292/cross-linked-polyelectrolyte-and-its-function-in-adsorption-of-fluid-and-excess-nitrogen-waste-products-an-experimental-study-on-dialysate-effluent-fluid
#2
Hamid Tayebi Khosroshahi, Behzad Abedi, Sabalan Daneshvar, Effat Alizadeh, Mohammadreza Khalilzadeh, Yaghoub Abedi
INTRODUCTION: One of the most important issues in patients with chronic kidney disease is fluid retention and volume overload accompanied by retention of nitrogenous waste products and some electrolytes. Bowel fluid contains high levels of urea, creatinine, uric acid, and electrolytes, which make it a potential candidate for intestinal excretion of nitrogen wastes and electrolytes. Cross-linked polyelectrolyte (CLP) is a polymer that, given orally, absorbs excess fluid, electrolyte, and nitrogenous waste products...
July 2017: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/28781906/cystatin-c-as-a-marker-for-renal-impairment-in-preeclampsia
#3
Apeksha Niraula, Madhab Lamsal, Nirmal Baral, Shankar Majhi, Seraj Ahmed Khan, Pritha Basnet, Kashyap Dahal
Preeclampsia is a devastating pregnancy-associated disorder characterized by the onset of hypertension, proteinuria, and edema with limited plausible pathophysiology known. Cystatin-C, a novel marker for the detection of renal impairment, is increased in preeclampsia at an early stage. This study was aimed to evaluate the diagnostic efficiency of Cystatin-C as an early marker of renal function in preeclampsia comparing it to the traditional renal markers. A hospital based comparative cross-sectional study was performed on 104 women (52 diagnosed cases of preeclampsia and 52 healthy pregnant women)...
2017: Journal of Biomarkers
https://www.readbyqxmd.com/read/28780091/production-performance-and-milk-fatty-acid-profile-in-grazing-dairy-cows-offered-ground-corn-or-liquid-molasses-as-the-sole-supplemental-nonstructural-carbohydrate-source
#4
A F Brito, K J Soder, P Y Chouinard, S F Reis, S Ross, M D Rubano, M D Casler
The objective of this study was to compare the effects of ground corn or liquid molasses fed as the sole supplemental nonstructural carbohydrate (NSC) source on production performance, milk fatty acid (FA) profile, grazing behavior, and N metabolism in grazing dairy cows. A strip-grazing management system was used, with cows offered a new strip of fresh herbage after each milking, resulting in approximately 16 h of access to pasture daily. Animals were fed a diet formulated to yield an 86:14 forage-to-concentrate ratio consisting [dry matter (DM) basis] of 74% mixed grass-legume herbage, 12% mixed-mostly legume baleage, 12% NSC source, and 2% mineral-vitamin premix...
August 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28771433/the-impact-of-vitamin-c-on-the-relationship-among-inflammation-lipid-peroxidation-and-platelet-activation-during-analgesic-nephropathy-in-rats
#5
Nikola Hadzi-Petrushev, Dine Mitrov, Vladimir Kostovski, Mitko Mladenov
BACKGROUND: Oxidative stress and inflammation are involved in the pathogenesis of paracetamol-induced renal damage. This study examines the relationship between 8-iso-prostaglandin F2α (8-iso-PGF2α) and platelet activation as well as the relative contribution of the pro-inflammatory markers interleukin (IL)-1β and tumor necrosis factor-α (TNF-α) in enhanced 8-iso-PGF2α biosynthesis, as a complementary onset during analgesic nephropathy induced by chronic treatment with paracetamol...
August 3, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28727028/production-management-and-the-environment-symposium-measurement-and-mitigation-of-reactive-nitrogen-species-from-swine-and-poultry-production
#6
W Powers, M Capelari
Reactive nitrogen (Nr) species include oxides of nitrogen [N; nitric oxide, nitrogen dioxide and nitrous oxide (NO)], anions (nitrate and nitrite), and amine derivatives [ammonia (NH), ammonium salts and urea]. Of the different Nr species, air emissions from swine and poultry facilities are predominantly NH followed by NO. Excreta emissions are NH, ammonium ions, and urea with trace amounts of nitrate and nitrite. Farm systems and practices that handle manure as a wet product without pH modification favor almost exclusive NH production...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28720209/the-influence-of-oxazaphosphorine-agents-on-kidney-function-in-rats
#7
Łukasz Dobrek, Beata Skowron, Agnieszka Baranowska, Klaudia Płoszaj, Dorota Bądziul, Piotr Thor
BACKGROUND AND OBJECTIVE: The application of cytostatic oxazaphosphorines such as cyclophosphamide (CP) and ifosfamide (IF) is associated with the risk of kidney damage that, depending on the type of drug, dose and route of administration, adopts a different clinical entity and severity. The aim of our study was to assess the influence of CP and IF on the kidney histology and function in rats intraperitoneally treated with four doses of either CP or IF. MATERIALS AND METHODS: A total of 30 rats were divided into three groups (10 in each group): group 1 (control), sham treated with saline solution, group 2 (treated with 75mg/kg b...
July 2, 2017: Medicina
https://www.readbyqxmd.com/read/28711249/estimating-the-energetic-cost-of-feeding-excess-dietary-nitrogen-to-dairy-cows
#8
K F Reed, H C Bonfá, J Dijkstra, D P Casper, E Kebreab
Feeding N in excess of requirement could require the use of additional energy to metabolize excess protein, and to synthesize and excrete urea; however, the amount and fate of this energy is unknown. Little progress has been made on this topic in recent decades, so an extension of work published in 1970 was conducted to quantify the effect of excess N on ruminant energetics. In part 1 of this study, the results of previous work were replicated using a simple linear regression to estimate the effect of excess N on energy balance...
September 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28676189/changes-in-renal-function-after-discontinuation-of-vitamin-d-analogues-in-advanced-chronic-kidney-disease
#9
Francisco Caravaca, Fernando Caravaca-Fontán, Lilia Azevedo, Enrique Luna
BACKGROUND: In routine clinical practice, the prescription of vitamin D analogues (VDA) in patients with chronic kidney disease (CKD) is often associated with a decline of the estimated renal function. The reason for this is not fully understood. AIMS: To analyse the effects of VDA discontinuation in advanced CKD and to determine the factors associated with changes in renal function. MATERIAL AND METHODS: Retrospective cohort study of adult patients with advanced CKD...
July 1, 2017: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/28672943/metformin-ameliorates-diabetic-nephropathy-in-a-rat-model-of-low-dose-streptozotocin-induced-diabetes
#10
Siwei Zhang, Huali Xu, Xiaofeng Yu, Yi Wu, Dayun Sui
The present study aimed to explore the renoprotective effect of metformin on diabetic nephropathy in type 2 diabetic rats. A rat model of type 2 diabetic nephropathy (T2DN) was successfully induced via a high-fat diet combined with a single low-dose of streptozotocin. Metformin was administered intragastrically for 13 weeks, and fasting blood glucose (FBG), total cholesterol (TC), triglycerides (TG), HDL-c, LDL-c, urinary and serum creatinine levels were subsequently examined at the end of administration. Renal function was determined after the treatment protocol...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28670881/ameliorative-effect-of-coenzyme-q10-and-or-candesartan-on-carboplatin-induced-nephrotoxicity-roles-of-apoptosis-transforming-growth-factor-%C3%AE-1-nuclear-factor-kappa-b-and-the-nrf2-ho-1-pathway
#11
Ahmed M Kabel, Abeer A Elkhoely
Background: Carboplatin is a drug that is used for treatment of many types of cancer. However, it may produce serious nephrotoxicity. Candesartan is angiotensin II receptor antagonist employed mainly for control of hypertension. Coenzyme Q10 (CoQ10) is a fat-soluble substance which was proven to have potent antioxidant and anti-inflammatory properties. Aim: Our aim was to study the effects of candesartan and/or CoQ10 on carboplatin-induced nephrotoxicity in mice. Methods: Sixty mice were divided into 6 equal groups: Control untreated; carboplatin; carboplatin + candesartan; carboplatin + CoQ10; carboplatin + carboxymethyl cellulose; and carboplatin + candesartan + CoQ10 group...
June 25, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28665768/identification-of-a-sensitive-urinary-biomarker-selenium-binding-protein-1-for-early-detection-of-acute-kidney-injury
#12
Kyeong Seok Kim, Hun Yong Yang, Hosup Song, Ye Rim Kang, JiHoon Kwon, JiHye An, Ji Yeon Son, Seung Jun Kwack, Young-Mi Kim, Ok-Nam Bae, Mee-Young Ahn, Jaewon Lee, Sungpil Yoon, Byung Mu Lee, Hyung Sik Kim
Acute kidney injury (AKI) is associated with increased mortality rate in patients but clinically available biomarkers for disease detection are currently not available. Recently, a new biomarker, selenium-binding protein 1 (SBP1), was identified for detection of nephrotoxicity using proteomic analysis. The aim of this study was to assess the sensitivity of urinary SBP1 levels as an early detection of AKI using animal models such as cisplatin or ischemia/reperfusion (I/R). Sprague-Dawley rats were injected with cisplatin (6 mg/kg, once i...
June 30, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28665281/experimental-model-for-acute-kidney-injury-caused-by-uropathogenic-escherichia-coli
#13
Beata Skowron, Agnieszka Baranowska, Jolanta Kaszuba-Zwoińska, Grażyna Więcek, Anna Malska-Woźniak, Piotr Heczko, Magdalena Strus
INTRODUCTION: Acute kidney injury (AKI) is the rapid deterioration of renal function, diagnosed on the basis of an increase in serum creatinine and abnormal urinary parameters. AKI is associated with increased risk of mortality or chronic kidney disease (CKD). The aim of the study was to develop an experimental model for AKI resulting from Escherichia coli-induced pyelonephritis. E. coli was isolated from a patient with clinical symptoms of urinary tract infection (UTI). MATERIAL/METHODS: The study included three groups of female Wistar rats (groups 1, 2 and 3), in which pyelonephritis was induced by transurethral inoculation with highly virulent E...
June 19, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28650699/effect-of-euterpe-oleracea-mart-seeds-extract-on-chronic-ischemic-renal-injury-in-renovascular-hypertensive-rats
#14
Cristiane Aguiar da Costa, Dayane Teixeira Ognibene, Viviane Silva Cristino Cordeiro, Graziele Freitas de Bem, Izabelle Barcellos Santos, Ricardo Andrade Soares, Letícia L de Melo Cunha, Lenize C R M Carvalho, Roberto Soares de Moura, Angela Castro Resende
Previously, we have demonstrated that the seeds of Euterpe oleracia Mart. (açaí) are rich in polyphenols with antihypertensive and antioxidant properties. This study evaluated the renal protective effects of the hydroalcoholic extract obtained from the seeds of açaí (ASE) fruits in two-kidney, one-clip (2K1C) renovascular hypertension. Young male Wistar rats were used to obtain 2K1C and sham groups. Animals received ASE (200 mg/(kg·day) in drinking water) or vehicle for 40 days. We evaluated serum and urinary parameters, renal structural changes, and oxidative status...
June 26, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28648206/how-to-assess-the-efficacy-of-phosphate-binders
#15
Francisco Caravaca, Fernando Caravaca-Fontán, Lilia Azevedo, Enrique Luna
BACKGROUND AND AIMS: The efficacy of phosphate binders is difficult to be estimated clinically. This study analyzes the changes in serum phosphate and urinary phosphate excretion after the prescription of phosphate binders (PB) in patients with chronic kidney disease stage 4-5 pre-dialysis, and the usefulness of the ratio between total urinary phosphate and protein catabolic rate (Pu/PCR) for estimating the efficacy of PB. METHODS: This retrospective observational cohort study included adult chronic kidney disease patients...
May 2017: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/28645705/acid-load-and-phosphorus-homeostasis-in-ckd
#16
Pascale Khairallah, Tamara Isakova, John Asplin, Lee Hamm, Mirela Dobre, Mahboob Rahman, Kumar Sharma, Mary Leonard, Edgar Miller, Bernard Jaar, Carolyn Brecklin, Wei Yang, Xue Wang, Harold Feldman, Myles Wolf, Julia J Scialla
BACKGROUND: The kidneys maintain acid-base homeostasis through excretion of acid as either ammonium or as titratable acids that primarily use phosphate as a buffer. In chronic kidney disease (CKD), ammoniagenesis is impaired, promoting metabolic acidosis. Metabolic acidosis stimulates phosphaturic hormones, parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF-23) in vitro, possibly to increase urine titratable acid buffers, but this has not been confirmed in humans. We hypothesized that higher acid load and acidosis would associate with altered phosphorus homeostasis, including higher urinary phosphorus excretion and serum PTH and FGF-23...
June 21, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28638881/aristolochia-bracteolate-retz-attenuates-hyperuricemia-in-a-metabolic-arthritis-rat-model
#17
Yun-Peng Li, Shuang Wu, Afou Ran, Da-Yong Xu, Jing-Mei Wei, Zi-Long Zhao
BACKGROUND: The leaves of Aristolochia bracteolata Retz. has been documented in the folk medicine literature for its anti-arthritic activity. The target of the research envisaged was to elucidate the activity of A. bracteolata extract on hyperuricemic condition in arthritis rat model. MATERIALS AND METHODS: Dried and powdered plant leaves were extracted using ether and chloroform. Potassium oxonate was injected intra-articularly to produce arthritis. The hyperuricemic effect, of A...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28614828/relationship-between-sodium-intake-and-water-intake-the-false-and-the-true
#18
Lise Bankir, Julie Perucca, Peter Norsk, Nadine Bouby, Morten Damgaard
Generally, eating salty food items increases thirst. Thirst is also stimulated by the experimental infusion of hypertonic saline. But, in steady state, does the kidney need a higher amount of water to excrete sodium on a high than on a low sodium intake? This issue is still controversial. The purpose of this review is to provide examples of how the kidney handles water in relation to salt intake/output. It is based on re-analysis of previously published studies in which salt intake was adjusted to several different levels in the same subjects, and in databases of epidemiologic studies in populations on an ad libitum diet...
2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28608638/effect-of-different-levels-of-copper-nanoparticles-and-copper-sulphate-on-performance-metabolism-and-blood-biochemical-profiles-in-broiler-chicken
#19
A Scott, K P Vadalasetty, M Łukasiewicz, S Jaworski, M Wierzbicki, A Chwalibog, E Sawosz
A study was conducted to investigate the influence of copper administration in ovo to chicken embryos and/or supplied in drinking water to growing chickens in the form copper nanoparticles (Cu-NP) or copper sulphate (CuSO4 ). The fertilised eggs were assigned to three groups (n = 50 per group): control (not injected), injected with 50 mg/kg Cu-NP or with 50 mg/kg CuSO4 at day 1 of incubation. Thereafter, 126 one-day-old broiler chickens were randomly assigned to seven post-hatched groups: control not injected and not provided with Cu in the drinking water, injected with 50 mg/kg Cu-NP + 20 mg/kg in water, not injected + 20 mg/kg Cu-NP in water, injected with 50 mg/kg CuSO4  + 20 mg/kg in water, not injected + 20 mg/kg CuSO4 in water, injected with 50 mg/kg Cu-NP and injected with 50 mg/kg CuSO4 ...
June 13, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28607409/functional-characterization-of-aquaporin-like-genes-in-the-human-bed-bug-cimex-lectularius
#20
Hitoshi Tsujimoto, Joyce M Sakamoto, Jason L Rasgon
The bed bug Cimex lectularius is a blood-feeding re-emerging annoyance pest insect that has the ability to transmit Trypanosoma cruzi under experimental laboratory conditions. Aquaporins (AQPs) are water channel proteins that are essential in biological organisms. C. lectularius are constantly exposed to water-related stress, suggesting that AQPs may offer novel control avenues. We identified and cloned four AQPs from C. lectularius, assessed tissue and lifestage-specific expression, and characterized biochemical functions in vitro and in vivo...
June 12, 2017: Scientific Reports
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