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creatine ribose

Alberto Vázquez-Salazar, Arturo Becerra, Antonio Lazcano
BACKGROUND: The imidazole group is an ubiquitous chemical motif present in several key types of biomolecules. It is a structural moiety of purines, and plays a central role in biological catalysis as part of the side-chain of histidine, the amino acid most frequently found in the catalytic site of enzymes. Histidine biosynthesis starts with both ATP and the pentose phosphoribosyl pyrophosphate (PRPP), which is also the precursor for the de novo synthesis of purines. These two anabolic pathways are also connected by the imidazole intermediate 5-aminoimidazole-4-carboxamide ribotide (AICAR), which is synthesized in both routes but used only in purine biosynthesis...
2018: PloS One
Lianshuang Zhang, Jinpeng Yao, Xifeng Wang, Hongxing Li, Tongshen Liu, Wei Zhao
UNLABELLED: The aim of this study is to investigate whether PARP inhibitor could reduce cell apoptosis and injury in the heart during sepsis. MATERIALS AND METHODS: 60 healthy male Sprague-Dawley (SD) rats were randomly divided into 4 groups---sham group, modal group, 3-AB pretreatment group and 3-AB treatment group, 15 rats per group. The cecal ligation and puncture (CLP) model of sepsis was used. The following were determined--levels of malondialdehyde (MDA), ATP and nicotinamide adenine dinucleotide (NAD+), expression of PARP, Bcl-2, Bax, cytochrome C and caspase 3 activity in the myocardium tissue, levels of serum creatine kinase muscle brain (CK-MB) fraction and troponin I...
2015: International Journal of Clinical and Experimental Pathology
Monica Muratori, Lara Tamburrino, Sara Marchiani, Marta Cambi, Biagio Olivito, Chiara Azzari, Gianni Forti, Elisabetta Baldi
Sperm DNA fragmentation (sDF) represents a threat to male fertility, human reproduction and the health of the offspring. The causes of sDF are still unclear, even if apoptosis, oxidative assault and defects in chromatin maturation are hypothesized. Using multicolor flow cytometry and sperm sorting, we challenged the three hypothesized mechanisms by simultaneously evaluating sDF and signs of oxidative damage (8-hydroxy, 2'-deoxyguanosine [8-OHdG] and malondialdehyde [MDA]), apoptosis (caspase activity and cleaved poly[ADP-ribose] polymerase [cPARP]) and sperm immaturity (creatine phosphokinase [CK] and excess of residual histones)...
January 30, 2015: Molecular Medicine
Enkui Hao, Partha Mukhopadhyay, Zongxian Cao, Katalin Erdélyi, Eileen Holovac, Lucas Liaudet, Wen-Shin Lee, György Haskó, Raphael Mechoulam, Pál Pacher
Doxorubicin (DOX) is a widely used, potent chemotherapeutic agent; however, its clinical application is limited because of its dose-dependent cardiotoxicity. DOX's cardiotoxicity involves increased oxidative/nitrative stress, impaired mitochondrial function in cardiomyocytes/endothelial cells and cell death. Cannabidiol (CBD) is a nonpsychotropic constituent of marijuana, which is well tolerated in humans, with antioxidant, antiinflammatory and recently discovered antitumor properties. We aimed to explore the effects of CBD in a well-established mouse model of DOX-induced cardiomyopathy...
January 6, 2015: Molecular Medicine
Kai Xia, Xiaoyun He, Qiu Dai, Wen-Hsing Cheng, Xiaozhe Qi, Mingzhang Guo, YunBo Luo, Kunlun Huang, Changhui Zhao, Wentao Xu
Ochratoxin A (OTA) is known to be nephrotoxic and hepatotoxic in rodents when exposed orally. To understand the systematic responses to OTA exposure, GC-MS- and (1)H-NMR-based metabolomic techniques together with histopathological assessments were applied to analyse the urine and plasma of OTA-exposed rats. It was found that OTA exposure caused significant elevation of amino acids (alanine, glycine, leucine etc.), pentose (ribose, glucitol, xylitol etc.) and nucleic acid metabolites (pseudouridine, adenosine, uridine)...
2014: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
Stephanie zur Nedden, Alexander S Doney, Bruno G Frenguelli
Cerebral ischaemia rapidly depletes cellular ATP. Whilst this deprives brain tissue of a valuable energy source, the concomitant production of adenosine mitigates the damaging effects of energy failure by suppressing neuronal activity. However, the production of adenosine and other metabolites, and their loss across the blood-brain barrier, deprives the brain of substrates for the purine salvage pathway, the primary means by which the brain makes ATP. Because of this, cerebral ATP levels remain depressed after brain injury...
January 2014: Journal of Neurochemistry
Kiterie M E Faller, Debra J Medway, Dunja Aksentijevic, Liam Sebag-Montefiore, Jürgen E Schneider, Craig A Lygate, Stefan Neubauer
BACKGROUND: Reduced levels of creatine and total adenine nucleotides (sum of ATP, ADP and AMP) are hallmarks of chronic heart failure and restoring these pools is predicted to be beneficial by maintaining the diseased heart in a more favourable energy state. Ribose supplementation is thought to support both salvage and re-synthesis of adenine nucleotides by bypassing the rate-limiting step. We therefore tested whether ribose would be beneficial in chronic heart failure in control mice and in mice with elevated myocardial creatine due to overexpression of the creatine transporter (CrT-OE)...
2013: PloS One
Anna Caretti, Paola Bianciardi, Marina Marini, Provvidenza M Abruzzo, Alessandra Bolotta, Carlo Terruzzi, Franco Lucchina, Michele Samaja
BACKGROUND/AIMS: The simultaneous supplementation of creatine and D-ribose has been shown to reduce apoptosis in vitro in non-irreversibly injured cultured ischemic cardiomyocytes through down-regulation of the signaling mechanisms governing adenosine monophosphate-activated protein kinase (AMPK) and protein kinase B (Akt). Here, we test the hypothesis that an analogous mechanism exists in vivo when the challenge is chronic exposure to hypoxia. METHODS: Five week-old mice were exposed to an atmosphere containing 10% O2 for 10 days...
2013: Current Pharmaceutical Design
Yuh-Chiang Shen, Jiin-Cherng Yen, Kuo-Tong Liou
BACKGROUND AND PURPOSE: Caffeic acid phenethyl ester (CAPE), a phenolic compound isolated from propolis, displays a variety of biological activities. The aim is to examine the protective effect and mechanisms of CAPE on an eccentric exercise-induced muscle injury model. EXPERIMENTAL APPROACH: An intermittent downhill eccentric exercise protocol was used. The oxidative tissue injury and expression of cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), interleukin-1β (IL-1β), monocyte chemotactic protein-1 (MCP-1), and activation of nuclear factor-κB (NF-κB) were examined...
2013: Pharmacology
Zsolt Sarszegi, Eszter Bognar, Balazs Gaszner, Attila Kónyi, Ferenc Gallyas, Balazs Sumegi, Zoltan Berente
In this study, we investigate the cardiotoxic effects of the well-known cytostatic agent imatinib mesylate (Gleevec), and presented evidence for the cardioprotective effect of BGP-15 which is a novel insulin sensitizer. The cardiotoxic effect of imatinib mesylate was assessed in Langendorff rat heart perfusion system. The cardiac high-energy phosphate levels (creatine phosphate (PCr) and ATP) were monitored in situ by (31)P NMR spectroscopy. The protein oxidation, lipid peroxidation, and the activation of signaling pathways were determined from the freeze-clamped hearts...
June 2012: Molecular and Cellular Biochemistry
Sahana Vishwanath, Mishal Abdullah, Amro Elbalkhi, Julian L Ambrus
INTRODUCTION: To the best of our knowledge, we describe for the first time a patient in whom an unusual metabolic myopathy was identified after failure to respond to curative therapy for a systemic vasculitis, polyarteritis nodosa. We hope this report will heighten awareness of common metabolic myopathies that may present later in life. It also speculates on the potential relationship between metabolic myopathy and systemic vasculitis. CASE PRESENTATION: A 78-year-old African-American woman with a two-year history of progressive fatigue and exercise intolerance presented to our facility with new skin lesions and profound muscle weakness...
2011: Journal of Medical Case Reports
Xu-Yong Li, Lin Xu, Guo-Sheng Lin, Xiao-Yan Li, Xue-Jun Jiang, Tao Wang, Jing-Jun Lü, Bin Zeng
Many studies have examined the association between coffee consumption and risk of cardiovascular disease, but the results remain controversial. Caffeine is one of the main biologically active compounds of coffee. The aim of this study was to investigate the potential role of caffeine on myocardial ischemia/reperfusion (I/R) injury in the rats. We administered caffeine (25 mg/kg per day) or saline in rats for 4 weeks before myocardial ischemia/reperfusion operation. Compared with the sham group, caffeine treatment decreased ischemia-associated infarct size, serum creatine kinase, and lactate dehydrogenase 3-h reperfusion after 30-min ischemia...
September 2011: Shock
Andrea Varga, Laurent Chaloin, Gyula Sági, Róbert Sendula, Eva Gráczer, Károly Liliom, Péter Závodszky, Corinne Lionne, Mária Vas
The wide specificity of 3-phosphoglycerate kinase (PGK) towards its nucleotide substrate is a property that allows contribution of this enzyme to the effective phosphorylation (i.e. activation) of nucleotide-based pro-drugs against HIV. Here, the structural basis of the nucleotide-PGK interaction is characterised in comparison to other kinases, namely pyruvate kinase (PK) and creatine kinase (CK), by enzyme kinetic analysis and structural modelling (docking) studies. The results provided evidence for favouring the purine vs...
June 2011: Molecular BioSystems
Anna Caretti, Paola Bianciardi, Giusy Sala, Carlo Terruzzi, Franco Lucchina, Michele Samaja
BACKGROUND/AIMS: To alleviate ischemia-induced injury in the myocardium, a tissue that depends critically on energy-yielding processes, creatine may be used to enhance energy metabolism, whereas D-ribose may provide building blocks for ATP synthesis. We test the hypothesis that simultaneous supplementation of creatine+D-ribose protects non-irreversibly injured ischemic cardiomyocytes by reducing apoptosis. RESULTS: When H9c2 cardiomyocytes were exposed to 24-h ischemia (1% O(2) with glucose deprivation), viability was severely compromised, but administration of 2...
2010: Cellular Physiology and Biochemistry
Rosaline Quinlivan, Andrea Martinuzzi, Benedikt Schoser
BACKGROUND: McArdle disease (Glycogen Storage Disease type V) is caused by an absence of muscle phosphorylase leading to exercise intolerance, myoglobinuria rhabdomyolysis and acute renal failure. OBJECTIVES: To review systematically the evidence from randomized controlled trials of pharmacological or nutritional treatments for improving exercise performance and quality of life in McArdle disease. SEARCH STRATEGY: We searched the Cochrane Neuromuscular Disease Group Specialised Register (17 May 2010), the Cochrane Central Register of Controlled Trials (Issue 2, 2010 in The Cochrane Library), MEDLINE (January 1966 to May 2010) and EMBASE (January 1980 to May 2010) using the search terms 'McArdle disease', 'Glycogen Storage Disease type V' and 'muscle phosphorylase deficiency'...
2010: Cochrane Database of Systematic Reviews
David Bishop
A well designed diet is the foundation upon which optimal training and performance can be developed. However, as long as competitive sports have existed, athletes have attempted to improve their performance by ingesting a variety of substances. This practice has given rise to a multi-billion-dollar industry that aggressively markets its products as performance enhancing, often without objective, scientific evidence to support such claims. While a number of excellent reviews have evaluated the performance-enhancing effects of most dietary supplements, less attention has been paid to the performance-enhancing claims of dietary supplements in the context of team-sport performance...
December 1, 2010: Sports Medicine
Jianfeng Chen, Yong Sun, Xia Mao, Qizhan Liu, Hui Wu, Yabing Chen
Receptor activator of nuclear factor κB ligand (RANKL) is the key regulator for osteoclast formation and function. During osteoclastogenesis, RANKL-stimulated signals differentially modulate expression of a large number of proteins. Using proteomics approaches, we identified that brain-type cytoplasmic creatine kinase (Ckb) was greatly induced in mature osteoclasts. Ckb has been shown to contribute to osteoclast function. However, the mechanisms of Ckb regulation and the contribution of other isoforms of creatine kinase during RANKL-induced osteoclastogenesis are unknown...
November 19, 2010: Journal of Biological Chemistry
Kesavan S Jayachandran, Mahmood Khan, Karuppaiyah Selvendiran, S Niranjali Devaraj, Periannan Kuppusamy
The objective of the present study was to evaluate the efficacy and mechanism of Crataegus oxycantha (COC) extract in preventing ischemia-reperfusion (IR) injury in an in vivo rat model of acute myocardial infarction induced by a 30-minute regional ischemia followed by 72 hours of reperfusion. The COC extract [100 mg/(kg body weight)] was administered 12 hours after the surgical procedure and then at 24-hour intervals for 3 days. Animals treated with COC extract showed a significant decrease in creatine kinase activity and infarct size...
November 2010: Journal of Cardiovascular Pharmacology
Jan P Roesner, Jan Mersmann, Stefan Bergt, Karl Bohnenberg, Carmen Barthuber, Csaba Szabo, Gabriele E F Nöldge-Schomburg, Kai Zacharowski
Pharmacological protection from myocardial reperfusion injury, despite plenty of approaches, has still not been realized in humans. We studied the putative infarct size (IS)-sparing capacity of poly(ADP-ribose)polymerase inhibitor, INO-1001, and focused on cardiac functional recovery during reperfusion. Male farm-bred Landrace pigs were subjected to 1-h left anterior descending coronary artery occlusion followed by 3 h of reperfusion (control). Infarct size was determined by triphenyltetrazolium chloride/Evans blue staining...
May 2010: Shock
Selvinaz Dalaklioglu, Merih Tekcan, Nazli Ece Gungor, Ciler Celik-Ozenci, Nazif Hikmet Aksoy, Asli Baykal, Arda Tasatargil
The aim of the present study was to investigate the role of poly(ADP-ribose)polymerase (PARP) activity in vancomycin (VCM)-induced renal injury and to determine whether 1,5-isoquinelinediol (ISO), a PARP inhibitor agent, could be offered as an alternative therapy in VCM-induced renal impairment. Rats were divided into four groups as follows: (i) control (Group 1); (ii) VCM-treated (Group 2); (iii) VCM plus ISO-treated (Group 3); and (iv) ISO-treated (Group 4). VCM (200mg/kg, i.p., twice daily) was administered to Groups 2 and 3 for 7 days...
February 1, 2010: Toxicology Letters
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