Consulta: subjectFacets:"Arginase"
Registros recuperados: 4
Data/hora: 04/06/2024 06:27:03

Contribution of dietary arginine to nitrogen utilisation and excretion in juvenile sea bass (Dicentrarchus labrax) fed diets differing in protein source
Provedor de dados: 5
Autores: Tulli, F; Vachot, Christianne; Tibaldi, E; Fournier, Vincent; Kaushik, Sadasivam.
The role of dietary arginine in affecting nitrogen utilisation and excretion was studied in juvenile European sea bass (Dicentrarchus labrax) fed for 72 days with diets differing in protein sources (plant protein-based (PM) and fish-meal-based (FM)). Fish growth performance and nitrogen utilisation revealed that dietary Arg surplus was beneficial only in PM diets. Dietary Arg level significantly affected postprandial plasma urea concentrations. Hepatic arginase activity increased (P &lt; 0.05) in response to dietary Arg surplus in fish fed plant protein diets; conversely ornithine transcarbamylase activity was very low and inversely related to arginine intake. No hepatic carbamoyl phosphate synthetase III activity was detected. Dietary arginine levels did...
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Sea bass; Excretion; Arginase; Urea; Arginine.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-6317.pdf

L-arginine metabolism in mitochondria isolated from the liver of Antarctic fish Notothenia rossii and Notothenia neglecta
Provedor de dados: 52
Autores: Rodrigues,Edson; Ribeiro,Ana Cristina Miguez Teixeira; Bacila,Metry.
The arginase tissue distribution, the biochemical properties of the argininolytic system and the subcellular localization of the enzymes carbamoylphosphate synthetase, ornithinecarbamoyl transferase, glutamine synthetase and arginase in Antarctic fish, N. neglecta and N. rossii were the main aims of the present work. The tissue with highest argininolytic activity was the kidney distal portion amounting as much as four times the specific activity of the hepatic tissue. Arginase and ornithine carbamoyltransferase were found as mitochondrial enzymes, while glutamine synthetase and carbamoylphosphate synthetase were found as cytosolic enzymes. Argininolytic assays with isolated mitochondria gave values of Kmapp for the hydrolysis of arginine 2 to 3.5 times...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antarctic fish; Arginine; Arginase; Urea cycle; N. neglecta; N. rossii.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600017

Effect of psychological stress on the L-arginine-nitric oxide pathway and semen quality
Provedor de dados: 56
Autores: Eskiocak,S.; Gozen,A.S.; Taskiran,A.; Kilic,A.S.; Eskiocak,M.; Gulen,S.
It has been reported that mental stress causes abnormality of spermiogram parameters. We investigated the effect of psychological stress on the L-arginine-nitric oxide (NO) pathway. Semen samples were collected from 29 healthy fourth semester medical students just before (stress) and 3 months after (non-stress) the final examinations. Psychological stress was measured by the State Anxiety Inventory questionnaire. After standard semen analysis, arginase activity and NO concentration were measured spectrophotometrically in the seminal plasma. Measurements were made in duplicate. During the stress period, sperm concentration (41.28 ± 3.70 vs 77.62 ± 7.13 x 10(6)/mL), rapid progressive motility of spermatozoa (8.79 ± 1.66 vs 20.86 ± 1.63%) and seminal plasma...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psychological stress; Arginase; Nitric oxide; Sperm motility; Sperm count.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000500003

Aging alters the production of iNOS, arginase and cytokines in murine macrophages
Provedor de dados: 56
Autores: Cecílio,C.A.; Costa,E.H.; Simioni,P.U.; Gabriel,D.L.; Tamashiro,W.M.S.C.
The limited amount of information on the primary age-related deficiencies in the innate immune system led us to study the production of inducible nitric oxide synthase (iNOS), arginase, and cytokines in macrophages of young (8 weeks old) and old (72 weeks old) female BALB/c mice. We first evaluated iNOS and arginase inducers on peritoneal (PMΦ) and bone marrow-derived (BMMΦ) macrophages of young BALB/c and C57BL/6 mice, and then investigated their effects on macrophages of old mice. Upon stimulation with lipopolysaccharide (LPS), resident and thioglycolate-elicited PMΦ from young mice presented higher iNOS activity than those from old mice (54.4%). However, LPS-stimulated BMMΦ from old mice showed the highest NO levels (50.1%). Identical NO levels were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aging; INOS; Arginase; Cytokines; Murine macrophages; Inflammatory stimuli.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000700010