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l-citrulline

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https://www.readbyqxmd.com/read/28706469/metabolic-response-of-porcine-colon-explants-to-in-vitro-infection-by-brachyspira-hyodysenteriae-a-leap-into-disease-pathophysiology
#1
Thijs Welle, Anna T Hoekstra, Ineke A J J M Daemen, Celia R Berkers, Matheus O Costa
INTRODUCTION: Swine dysentery caused by Brachyspira hyodysenteriae is a production limiting disease in pig farming. Currently antimicrobial therapy is the only treatment and control method available. OBJECTIVE: The aim of this study was to characterize the metabolic response of porcine colon explants to infection by B. hyodysenteriae. METHODS: Porcine colon explants exposed to B. hyodysenteriae were analyzed for histopathological, metabolic and pro-inflammatory gene expression changes...
2017: Metabolomics: Official Journal of the Metabolomic Society
https://www.readbyqxmd.com/read/28684243/plasma-l-citrulline-concentrations-in-l-arginine-supplemented-healthy-dogs
#2
K M Flynn, H B Kellihan, L A Trepanier
INTRODUCTION: To determine whether oral l-arginine increases plasma [l-citrulline] in dogs. ANIMALS: Eleven healthy staff-owned dogs were used in this study. MATERIALS AND METHODS: Dogs (n = 3) were given l-arginine (50mg/kg PO q8h) for 7 days, and plasma [l-arginine] and [l-citrulline] were analyzed by high performance liquid chromatography at baseline (BL), steady state trough, and 0.5, 1, 1.5, 2, 4, 6, and 8 h after final dosing on day 7...
July 3, 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/28662146/ntrc-dependent-control-of-exopolysaccharide-synthesis-and-motility-in-burkholderia-cenocepacia-h111
#3
Yilei Liu, Martina Lardi, Alessandro Pedrioli, Leo Eberl, Gabriella Pessi
Burkholderia cenocepacia is a versatile opportunistic pathogen that survives in a wide variety of environments, which can be limited in nutrients such as nitrogen. We have previously shown that the sigma factor σ54 is involved in the control of nitrogen assimilation and virulence in B. cenocepacia H111. In this work, we investigated the role of the σ54 enhancer binding protein NtrC in response to nitrogen limitation and in the pathogenicity of H111. Of 95 alternative nitrogen sources tested the ntrC showed defects in the utilisation of nitrate, urea, L-citrulline, acetamide, DL-lactamide, allantoin and parabanic acid...
2017: PloS One
https://www.readbyqxmd.com/read/28659740/biochemical-physiological-and-performance-response-of-a-functional-watermelon-juice-enriched-in-l-citrulline-during-a-half-marathon-race
#4
Ascensión Martínez-Sánchez, Domingo J Ramos-Campo, Bárbara Fernández-Lobato, Jacobo A Rubio-Arias, Fernando Alacid, Encarna Aguayo
Background: Watermelon is a rich natural source of l-citrulline. This non-essential amino acid increases exercise performance. Objective: Evaluate the effect of Fashion watermelon juice enriched in l-citrulline (CWJ) (3.45 g per 500 mL) in physical performance and biochemical markers after a half-marathon race. Design: A randomised, double blind, crossover design where 2 h after drinking 500 mL of CWJ or placebo (PLA, beverage without l-citrulline) amateur male runners performed two half-marathon races...
2017: Food & Nutrition Research
https://www.readbyqxmd.com/read/28611854/arginine-asymmetric-dimethylarginine-ratio-in-colorectal-surgery
#5
Neli Ragina, Gabrielle Davis, Michael Doorly, Kyle Cologne, Anthony J Senagore
BACKGROUND: Asymmetric dimethylarginine (ADMA) is a naturally occurring amino acid that inhibits the effects of nitric oxide synthetases, producing considerable effects on the vascular system. Recent studies have suggested that increased ADMA is a major contributor to endothelial dysfunction, resulting in significant effects on cardiovascular and renal function. METHODS: The study sample consisted of five male and 11 female patients scheduled for elective laparoscopic colorectal surgery; patients were between 41 and 77 years of age...
July 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28588208/human-dimethylarginine-dimethylaminohydrolase-1-inhibition-by-proton-pump-inhibitors-and-the-cardiovascular-risk-marker-asymmetric-dimethylarginine-in-vitro-and-in-vivo-significance
#6
S Tommasi, D J Elliot, J A Hulin, B C Lewis, M McEvoy, A A Mangoni
Proton pump inhibitor (PPI)-induced inhibition of dimethylarginine dimethylaminohydrolase 1 (DDAH1), with consequent accumulation of the nitric oxide synthase inhibitor asymmetric dimethylarginine (ADMA), might explain the increased cardiovascular risk with PPI use. However, uncertainty exists regarding whether clinical PPI concentrations significantly inhibit DDAH1 under linear initial rate conditions, and whether PPI-induced DDAH1 inhibition significantly increases ADMA in humans. DDAH1 inhibition by esomeprazole, omeprazole, pantoprazole, lansoprazole and rabeprazole was determined by quantifying DDAH1-mediated L-citrulline formation in vitro...
June 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28566583/bergamottin-promotes-adipocyte-differentiation-and-inhibits-tumor-necrosis-factor-%C3%AE-induced-inflammatory-cytokines-induction-in-3t3-l1-cells
#7
Hideya Mizuno, Tomoko Hatano, Ayako Taketomi, Mami Kawabata, Toshikatsu Nakabayashi
 Nowadays, a lot of food ingredients are marketed as dietary supplements for health. Because the effectiveness and mechanisms of these compounds have not been fully characterized, they might have unknown functions. Therefore, we investigated the effect of several food ingredients (Bergamottin, Chrysin, L-Citrulline and β-Carotene) known as health foods on adipocyte differentiation by using 3T3-L1 preadipocytes. In this study, we found that Bergamottin, a furanocoumarin isolated from grapefruit juice, promotes adipocyte differentiation...
2017: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/28513179/consumption-of-watermelon-juice-enriched-in-l-citrulline-and-pomegranate-ellagitannins-enhanced-metabolism-during-physical-exercise
#8
RANDOMIZED CONTROLLED TRIAL
Ascensión Martínez-Sánchez, Fernando Alacid, Jacobo A Rubio-Arias, Bárbara Fernández-Lobato, Domingo J Ramos-Campo, Encarna Aguayo
l-Citrulline is a nonessential amino acid precursor of arginine and indirectly a precursor of nitric oxide (NO), which is a vasodilator and increases mitochondrial respiration. On the other hand, the antioxidant pomegranate ellagitannins are precursors of urolithin A, which has been associated with mitophagy and increased muscle function. To elucidate if a single dose of watermelon enrichment with these compounds could have a positive effect after high-intensity exercise (eight sets of eight repetitions of half-squat exercise), a double-blind randomized crossover in vivo study was performed in healthy male subjects (n = 19)...
June 7, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28490336/characteristics-of-l-citrulline-transport-through-blood-brain-barrier-in-the-brain-capillary-endothelial-cell-line-tr-bbb-cells
#9
Kyeong-Eun Lee, Young-Sook Kang
BACKGROUND: L-Citrulline is a neutral amino acid and a major precursor of L-arginine in the nitric oxide (NO) cycle. Recently it has been reported that L-citrulline prevents neuronal cell death and protects cerebrovascular injury, therefore, L-citrulline may have a neuroprotective effect to improve cerebrovascular dysfunction. Therefore, we aimed to clarify the brain transport mechanism of L-citrulline through blood-brain barrier (BBB) using the conditionally immortalized rat brain capillary endothelial cell line (TR-BBB cells), as an in vitro model of the BBB...
May 10, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28460648/endothelial-dysfunction-in-individuals-born-after-fetal-growth-restriction-cardiovascular-and-renal-consequences-and-preventive-approaches
#10
C Yzydorczyk, J B Armengaud, A C Peyter, H Chehade, F Cachat, C Juvet, B Siddeek, S Simoncini, F Sabatier, F Dignat-George, D Mitanchez, U Simeoni
Individuals born after intrauterine growth restriction (IUGR) have an increased risk of perinatal morbidity/mortality, and those who survive face long-term consequences such as cardiovascular-related diseases, including systemic hypertension, atherosclerosis, coronary heart disease and chronic kidney disease. In addition to the demonstrated long-term effects of decreased nephron endowment and hyperactivity of the hypothalamic-pituitary-adrenal axis, individuals born after IUGR also exhibit early alterations in vascular structure and function, which have been identified as key factors of the development of cardiovascular-related diseases...
May 2, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/28448172/the-macrophage-stimulating-anti-cancer-agent-rrx-001-protects-against-ischemia-reperfusion-injury
#11
Pedro Cabrales, Scott Caroen, Arnold Oronsky, Corey Carter, Jane Trepel, Thomas Summers, Tony Reid, Neil Oronsky, Michelle Lybeck, Bryan Oronsky
BACKGROUND: RRx-001, a clinical macrophage-stimulating anti-cancer agent that also produces nitric oxide (NO) was studied in a model of ischemia-reperfusion injury. METHODS: The production of NO is dependent on the oxygen tension because nitric oxide synthases convert l-arginine to NO and l-citrulline in the presence of O2. Since the P450 enzymes, which metabolize nitrate esters such as nitroglycerin are dependent on oxygen, the generation of 'exogenous' NO is also sensitive to alterations in tissue PO2...
June 2017: Expert Review of Hematology
https://www.readbyqxmd.com/read/28436051/a-novel-mass-spectrometry-based-method-for-simultaneous-determination-of-asymmetric-and-symmetric-dimethylarginine-l-arginine-and-l-citrulline-optimized-for-lc-ms-tof-and-lc-ms-ms
#12
Jerzy Wiśniewski, Mariusz G Fleszar, Joanna Piechowicz, Małgorzata Krzystek-Korpacka, Angelika Chachaj, Andrzej Szuba, Katarzyna Lorenc-Kukula, Leszek Masłowski, Wojciech Witkiewicz, Andrzej Gamian
Nitric oxide (NO) is a regulatory molecule involved in many biological processes. NO is produced by nitric oxide synthase by conversion of l-arginine to l-citrulline. l-Arginine methylated derivatives, asymmetric and symmetric dimethylarginines (asymmetric dimethylarginine, ADMA, and symmetric dimethylarginine, SDMA), regulate l-arginine availability and the activity of nitric oxide synthase. As such, they have been frequently investigated as potential biomarkers in pathologies associated with dysfunctions in NO synthesis...
April 24, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28398243/neonatal-citrulline-supplementation-and-later-exposure-to-a-high-fructose-diet-in-rats-born-with-a-low-birth-weight-a-preliminary-report
#13
Nhat-Thang Tran, Marie-Cécile Alexandre-Gouabau, Anthony Pagniez, Khadija Ouguerram, Clair-Yves Boquien, Norbert Winer, Dominique Darmaun
A low birth weight (LBW) leads to a higher risk of metabolic syndrome in adulthood. Literature suggests that citrulline supplementation in adulthood prevents the effect of a high fructose diet on energy metabolism. Whether neonatal citrulline supplementation would alter early growth or energy metabolism in the long-term in rats with LBW is unknown. LBW pups born from dams fed a low (4%) protein diet, were nursed by normally-fed dams and received isonitrogenous supplements of either l-citrulline or l-alanine by gavage from the sixth day of life until weaning, and were subsequently exposed to 10%-fructose in drinking water from weaning to 90 days of age...
April 11, 2017: Nutrients
https://www.readbyqxmd.com/read/28381807/evaluation-of-the-effects-and-mechanism-of-l-citrulline-on-anti-obesity-by-appetite-suppression-in-obese-diabetic-kk-ay-mice-and-high-fat-diet-fed-sd-rats
#14
Maya Kudo, Hisae Yoshitomi, Maki Momoo, Shiori Suguro, Yoshie Yamagishi, Ming Gao
L-Citrulline (L-Cit), a free amino acid from watermelon, has effects on hypertension and anti-oxidization; however, there are few reports of effects related to obesity. This study investigated the effects and mechanism of L-Cit on anti-obesity in obese/diabetic KK-Ay mice and high-fat diet fed Sprague-Dawley (SD) rats. L-Cit induced significant reduction of food intake, body weight and fat tissue mass in obese/diabetic KK-Ay mice. Moreover, blood glucose level did not change but free fatty acid level and serum insulin level were significantly decreased by treatment with L-Cit, suggesting that L-Cit improved glucose and fatty metabolism in obesity model mice...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28365086/synthesis-and-hyperpolarisation-of-enos-substrates-for-quantification-of-no-production-by-1-h-nmr-spectroscopy
#15
Fernando Fernandez Diaz-Rullo, Francesco Zamberlan, Ryan E Mewis, Marianna Fekete, Lionel Broche, Lesley A Cheyne, Sergio Dall'Angelo, Simon B Duckett, Dana Dawson, Matteo Zanda
Hyperpolarization enhances the intensity of the NMR signals of a molecule, whose in vivo metabolic fate can be monitored by MRI with higher sensitivity. SABRE is a hyperpolarization technique that could potentially be used to image nitric oxide (NO) production in vivo. This would be very important, because NO dysregulation is involved in several pathologies, including cardiovascular ones. The nitric oxide synthase (NOS) pathway leads to NO production via conversion of l-arginine into l-citrulline. NO is a free radical gas with a short half-life in vivo (≈5s), therefore direct NO quantification is challenging...
May 15, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28325558/l-citrulline-ameliorates-cerebral-blood-flow-during-cortical-spreading-depression-in-rats-involvement-of-nitric-oxide-and-prostanoids-mediated-pathway
#16
Yuki Kurauchi, Koichi Mokudai, Asami Mori, Kenji Sakamoto, Tsutomu Nakahara, Masahiko Morita, Ayako Kamimura, Kunio Ishii
l-Citrulline is a potent precursor of l-arginine, and exerts beneficial effect on cardiovascular system via nitric oxide (NO) production. Migraine is one of the most popular neurovascular disorder, and imbalance of cerebral blood flow (CBF) observed in cortical spreading depression (CSD) contributes to the mechanism of migraine aura. Here, we investigated the effect of l-citrulline on cardiovascular changes to KCl-induced CSD. in rats. Intravenous injection of l-citrulline prevented the decrease in CBF, monitored by laser Doppler flowmetry, without affecting mean arterial pressure and heart rate during CSD...
February 17, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28315310/combined-l-citrulline-and-glutathione-administration-prevents-neuronal-cell-death-following-transient-brain-ischemia
#17
Kazuya Matsuo, Yasushi Yabuki, Kohji Fukunaga
We previously reported that oral L-citrulline (L-Cit) administration antagonizes neuronal cell death in hippocampus following transient brain ischemia and that oral glutathione (GSH) administration prevents neuronal death through antioxidant activity. Here, we tested potential synergy of combined L-Cit and GSH administration in protection against neuronal death following cerebral ischemia. One day after a 20-min bilateral common carotid artery occlusion (BCCAO), mice were orally administered L-Cit or GSH alone (at 40 or 100 mg/kg p...
March 14, 2017: Brain Research
https://www.readbyqxmd.com/read/28274276/treatment-with-l-citrulline-in-patients-with-post-polio-syndrome-study-protocol-for-a-single-center-randomised-placebo-controlled-double-blind-trial
#18
Simone Schmidt, Vanya Gocheva, Thomas Zumbrunn, Daniela Rubino-Nacht, Ulrike Bonati, Dirk Fischer, Patricia Hafner
BACKGROUND: Post-polio syndrome (PPS) is a condition that affects polio survivors years after recovery from an initial acute infection by the Poliomyelitis virus. Most often, patients who suffered from polio start to experience gradual new weakening in muscles, a gradual decrease in the size of muscles (muscle atrophy) and fatigue years after the acute illness. L-citrulline is known to change muscular metabolism synthesis by raising nitric oxide (NO) levels and increasing protein synthesis...
March 9, 2017: Trials
https://www.readbyqxmd.com/read/28238850/further-studies-of-the-effects-of-aging-on-arginine-metabolites-in-the-rat-vestibular-nucleus-and-cerebellum
#19
P Liu, N Gupta, Y Jing, N D Collie, H Zhang, P F Smith
Some studies have demonstrated that aging is associated with impaired vestibular reflexes, especially otolithic reflexes, resulting in postural instability. However, the neurochemical basis of these age-related changes is still poorly understood. The l-arginine metabolic system has been implicated in changes in the brain associated with aging. In the current study, we examined the levels of l-arginine and its metabolizing enzymes and downstream metabolites in the vestibular nucleus complex (VNC) and cerebellum (CE) of rats with and without behavioral testing which were young (4months old), middle-aged (12months old) or aged (24months old)...
February 24, 2017: Neuroscience
https://www.readbyqxmd.com/read/28188129/enhancement-of-fracture-healing-in-the-rat-modulated-by-compounds-that-stimulate-inducible-nitric-oxide-synthase-acceleration-of-fracture-healing-via-inducible-nitric-oxide-synthase
#20
R A Rajfer, A Kilic, A S Neviaser, L M Schulte, S M Hlaing, J Landeros, M G Ferrini, E Ebramzadeh, S-H Park
OBJECTIVES: We investigated the effects on fracture healing of two up-regulators of inducible nitric oxide synthase (iNOS) in a rat model of an open femoral osteotomy: tadalafil, a phosphodiesterase inhibitor, and the recently reported nutraceutical, COMB-4 (consisting of L-citrulline, Paullinia cupana, ginger and muira puama), given orally for either 14 or 42 days. MATERIALS AND METHODS: Unilateral femoral osteotomies were created in 58 male rats and fixed with an intramedullary compression nail...
February 2017: Bone & Joint Research
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