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https://www.readbyqxmd.com/read/28942723/case-report-of-capecitabine-toxicity-and-use-of-uridine-triacetate
#1
Wesley D Oliver, Alison P Duffy, Petr F Hausner
Fluorouracil and capecitabine are fluoropyrimidine chemotherapy agents that are commonly used for various cancers. These agents are generally well tolerated at standard doses; however, it has been reported that 31-34% of patients develop dose-limiting toxicities. Dihydropyrimidine dehydrogenase and thymidylate synthase play a major role in fluorouracil and capecitabine activity and toxicity. Uridine triacetate has shown promising results for the emergency treatment of patients who either receive an overdose of the cancer treatment fluorouracil or capecitabine or to treat patients who exhibit early-onset, severe, or life-threatening toxicity...
January 1, 2017: Journal of Oncology Pharmacy Practice
https://www.readbyqxmd.com/read/28934901/association-of-ugt2b7-polymorphisms-with-risk-of-induced-liver-injury-by-anti-tuberculosis-drugs-in-chinese-han
#2
Guo Chen, Shou-Quan Wu, Mei Feng, Yu Wang, Jing-Can Wu, Gui-Yi Ji, Miao-Miao Zhang, Qian-Qian Liu, Jian-Qing He
Anti-tuberculosis drug-induced liver injury (ATLI) is common during the treatment of tuberculosis (TB). As an important enzyme in the metabolism of many drugs, UGT2B7 (uridine diphosphate glucuronyl transferase 2B7) was associated with drug-induced liver disorder. This study investigated the association between the polymorphisms of UGT2B7 and ATLI in Chinese Han. Totally, 280 newly diagnosed TB patients had been followed up for 3 months after the prescription of anti-TB therapy. Tag-single-nucleotide polymorphism (tag-SNPs) (rs10028494 and rs7668282) were genotyped with the MassARRAY platform...
September 1, 2017: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/28934153/inhibitory-effect-of-selaginellins-from-selaginella-tamariscina-beauv-spring-against-cytochrome-p450-and-uridine-5-diphosphoglucuronosyltransferase-isoforms-on-human-liver-microsomes
#3
Jae-Kyung Heo, Phi-Hung Nguyen, Won Cheol Kim, Nguyen Minh Phuc, Kwang-Hyeon Liu
Selaginella tamariscina (Beauv.) has been used for traditional herbal medicine for treatment of cancer, hepatitis, and diabetes in the Orient. Numerous bioactive compounds including alkaloids, flavonoids, lignans, and selaginellins have been identified in this medicinal plant. Among them, selaginellins having a quinone methide unit and an alkylphenol moiety have been known to possess anticancer, antidiabetic, and neuroprotective activity. Although there have been studies on the biological activities of selaginellins, their modulatory potential of cytochrome P450 (P450) and uridine 5'-diphosphoglucuronosyltransferase (UGT) activities have not been previously evaluated...
September 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28933839/flexible-and-comprehensive-implementation-of-md-pmm-approach-in-a-general-and-robust-code
#4
Oliver Carrillo-Parramon, Sara Del Galdo, Massimiliano Aschi, Giordano Mancini, Andrea Amadei, Vincenzo Barone
The Perturbed Matrix Method (PMM) approach to be used in combination with Molecular Dynamics (MD) trajectories (MD-PMM) has been recoded from scratch, improved in several aspects, and implemented in the Gaussian suite of programs for allowing user friendly and yet flexible tool to estimate quantum chemistry observables in complex systems in condensed phases. Particular attention has been devoted to a description of rigid and flexible quantum centers together with powerful essential dynamics and clustering approaches...
September 21, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28932176/effect-of-udp-glucuronosyltransferase-ugt-1a-polymorphism-rs8330-and-rs10929303-on-glucuronidation-status-of-acetaminophen
#5
Huma Mehboob, Imtiaz Mahmood Tahir, Tahira Iqbal, Sadaf Saleem, Sofia Perveen, Aboubakker Farooqi
Interindividual variability in polymorphic uridine diphosphate-glucuronosyltransferase 1A1 (UGT1A1) ascribed to genetic diversity is associated with relative glucuronidation level among individuals. The present research was aimed to study the effect of 2 important single nucleotide polymorphisms (SNPs; rs8330 and rs10929303) of UGT1A1 gene on glucuronidation status of acetaminophen in healthy volunteers (n = 109). Among enrolled volunteers, 54.13% were male (n = 59) and 45.87% were female (n = 50). The in vivo activity of UGT1A1 was investigated by high-performance liquid chromatography-based analysis of glucuronidation status (ie, acetaminophen and acetaminophen glucuronide) in human volunteers after oral intake of a single dose (1000 mg) of acetaminophen...
July 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/28929376/divergent-coronary-flow-responses-to-uridine-adenosine-tetraphosphate-in-atherosclerotic-apoe-knockout-mice
#6
Bunyen Teng, Hicham Labazi, Changyan Sun, Yan Yang, Xiaorong Zeng, S Jamal Mustafa, Zhichao Zhou
Uridine adenosine tetraphosphate (Up4A) exerts potent relaxation in porcine coronary arteries that is reduced following myocardial infarction, suggesting a crucial role for Up4A in the regulation of coronary flow (CF) in cardiovascular disorders. We evaluated the vasoactive effects of Up4A on CF in atherosclerosis using ApoE knockout (KO) mice ex vivo and in vivo. Functional studies were conducted in isolated mouse hearts using the Langendorff technique. Immunofluorescence was performed to assess purinergic P2X1 receptor (P2X1R) expression in isolated mouse coronary arteries...
September 20, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28925930/in-vitro-glucuronidation-of-wushanicaritin-by-liver-microsomes-intestine-microsomes-and-expressed-human-udp-glucuronosyltransferase-enzymes
#7
Xiaodan Hong, Yuanru Zheng, Zifei Qin, Baojian Wu, Yi Dai, Hao Gao, Zhihong Yao, Frank J Gonzalez, Xinsheng Yao
Wushanicaritin, a natural polyphenol compound, exerts many biological activities. This study aimed to characterize wushanicaritin glucuronidation by pooled human liver microsomes (HLM), human intestine microsomes and individual uridine diphosphate-glucuronosyltransferase (UGT) enzyme. Glucuronidation rates were determined by incubating wushanicaritin with uridine diphosphoglucuronic acid-supplemented microsomes. Kinetic parameters were derived by appropriate model fitting. Reaction phenotyping, the relative activity factor (RAF) and activity correlation analysis were performed to identify the main UGT isoforms...
September 19, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28919465/uridine-treatment-protects-against-neonatal-brain-damage-and-long-term-cognitive-deficits-caused-by-hyperoxia
#8
Bulent Goren, Aysen Cakir, Cansu Sevinc, Sema Serter Kocoglu, Busra Ocalan, Ceren Oy, Zehra Minbay, Nevzat Kahveci, Tulin Alkan, Mehmet Cansev
Exposure to excessive oxygen in survivors of preterm birth is one of the factors that underlie the adverse neurological outcome in later life. Various pathological changes including enhanced apoptotic activity, oxidative stress and inflammation as well as decreased neuronal survival has been demonstrated in animal models of neonatal hyperoxia. The aim of the present study was to investigate the effect of administering uridine, an anti-apoptotic agent, on cellular, molecular and behavioral consequences of hyperoxia-induced brain damage in a neonatal rat model...
September 15, 2017: Brain Research
https://www.readbyqxmd.com/read/28918314/empirical-research-evaluating-the-effects-of-non-traditional-approaches-to-enhancing-sleep-in-typical-and-clinical-children-and%C3%A2-young-people
#9
REVIEW
Karyn G France, Laurie K McLay, Jolene E Hunter, Madeline L S France
This paper examines the effects of non-traditional (non-behavioural and non-prescription pharmaceutical) approaches to sleep in children and young people (0-18 y). A systematic search identified 79 studies that met inclusion criteria. Seventeen percent of the studies were rated as having a conclusive level of evidence, forty-two percent with preponderant evidence and forty-one percent with only suggestive evidence. There were promising indications, with certain populations only, for aromatherapy, ketogenic diets, an elimination diet (few foods diet), elimination of cow's milk, avoidance of caffeine, tryptophan with adenosine and uridine, omega-3 and omega-6, valerian, music, osteopathic manipulation and white noise...
July 29, 2017: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/28917600/atp-alters-protein-folding-and-function-of-escherichia-coli-uridine-phosphorylase
#10
Yi-Kai Liu, Tzu-Hsuan Lin, Pei-Fen Liu
Uridine phosphorylase is one of the critical enzymes in the pyrimidine salvage pathway. Cells regenerate uridine for nucleotide metabolism by incorporating uracil with ribose-1-phosphate with this enzyme. Recent studies indicate that Escherichia coli uridine phosphorylase is destabilized in the presence of ATP. However, the mechanism underlying the destabilization process and its influence on uridine phosphorylase function remain to be established. Here, we comprehensively investigated the effects of ATP on protein folding and function of Escherichia coli uridine phosphorylase...
September 13, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28915895/impact-of-ugt1a1-gene-polymorphisms-on-plasma-dolutegravir-trough-concentrations-and-neuropsychiatric-adverse-events-in-japanese-individuals-infected-with-hiv-1
#11
Hiroki Yagura, Dai Watanabe, Hiroyuki Kushida, Kosuke Tomishima, Hiroaki Togami, Atsushi Hirano, Masaaki Takahashi, Kazuyuki Hirota, Motoko Ikuma, Daisuke Kasai, Yasuharu Nishida, Munehiro Yoshino, Kunio Yamazaki, Tomoko Uehira, Takuma Shirasaka
BACKGROUND: Dolutegravir (DTG) is metabolized mainly by uridine diphosphate (UDP)-glucuronosyltransferase 1A1 (UGT1A1), and partly by cytochrome P450 3A (CYP3A). Therefore, we focused on UGT1A1 gene polymorphisms (*6 and *28) in Japanese individuals infected with human immunodeficiency virus (HIV)-1 to examine the relationship between their plasma trough concentration of DTG and gene polymorphisms. Recently, neuropsychiatric adverse events (NP-AEs) after the use of DTG have become a concern, so the association between UGT1A1 gene polymorphisms and selected NP-AEs was also investigated...
September 16, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28911783/kinetic-isotope-effect-studies-to-elucidate-the-reaction-mechanism-of-rna-modifying-enzymes
#12
Govardhan R Veerareddygari, Eugene G Mueller
The synthesis of specifically deuterated uridine, its incorporation into an RNA oligonucleotide substrate, and the use of the labeled substrate to determine the deuterium kinetic isotope effect for the reaction catalyzed by the pseudouridine synthases (enzymes that isomerize uridine to pseudouridine in RNA) are described. Both enzymes-TruB and RluA-display a primary kinetic isotope effect, which indicates the formation of a glycal intermediate in the ribose ring during turnover. Although the details of the protocols are specific to these two enzymes, the general methodology is readily adaptable to the synthesis and incorporation of other labeled nucleosides into any RNA molecule by in vitro transcription...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28911676/composition-analysis-and-antioxidant-properties-of-black-garlic-extract
#13
Xiaoming Lu, Ningyang Li, Xuguang Qiao, Zhichang Qiu, Pengli Liu
Black garlic produced from fresh garlic under controlled high temperature and humidity has strong antioxidant properties. To determine these compounds, five fractions (from F1 to F5) were separated and purified by elution with chloroform:methanol at different ratios (8:1, 6:1, 4:1, 2:1, and 0:1; v/v). The antioxidant activity of each fraction was analyzed. The results showed that F3 and F4 had higher phenolic contents and stronger 2,2-diphenyl-2-picrylhydrazyl radical scavenging activity than the others. Seven purified individual components were further separated using semipreparation high-performance liquid chromatography from these two intensely antioxidant fractions (F3 and F4), their structures were elucidated by high-performance liquid chromatography coupled to diode array detection, electrospray ionization, mass spectrometry, (1)H nuclear magnetic resonance, and (13)C nuclear magnetic resonance spectrometry...
April 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28901357/an-ortho-c-methylation-o-glycosylation-motif-on-a-hydroxy-coumarin-scaffold-selectively-installed-by-biocatalysis
#14
Alexander Gutmann, Margaretha Schiller, Mandana Gruber-Khadjawi, Bernd Nidetzky
Various bioactive natural products, like the aminocoumarin antibiotics novobiocin and coumermycin, exhibit an aromatic C-methyl group adjacent to a glycosylated phenolic hydroxyl group. Therefore, tailoring of basic phenolic scaffolds to contain the intricate C-methyl/O-glycosyl motif is of high interest for structural and functional diversification of natural products. We demonstrate site-selective 8-C-methylation and 7-O-β-d-glucosylation of 4,5,7-trihydroxy-3-phenyl-coumarin (1) by S-adenosyl-l-methionine dependent C-methyltransferase (from Streptomyces niveus) and uridine 5'-diphosphate glucose dependent glycosyltransferase from apple (Malus × domestica)...
September 13, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28894244/impact-of-protein-o-glcnacylation-on-neural-tube-malformation-in-diabetic-embryopathy
#15
Gyuyoup Kim, Lixue Cao, E Albert Reece, Zhiyong Zhao
Diabetes mellitus in early pregnancy can cause neural tube defects (NTDs) in embryos by perturbing protein activity, causing cellular stress, and increasing programmed cell death (apoptosis) in the tissues required for neurulation. Hyperglycemia augments a branch pathway in glycolysis, the hexosamine biosynthetic pathway (HBP), to increase uridine diphosphate-N-acetylglucosamine (UDP-GlcNAc). GlcNAc can be added to proteins by O-GlcNAc transferase (OGT) to regulate protein activity. In the embryos of diabetic mice, OGT is highly activated in association with increases in global protein O-GlcNAcylation...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28892962/crigler-najjar-syndrome-type-2-cns-type-2-an-unwonted-cause-of-jaundice-in-adults
#16
Prabhat Kumar, Gargi Sasmal, Shreya Gupta, Renu Saxena, Sudha Kohli
Crigler Najjar Syndrome (CNS) Type 2 is an uncommon genetic disorder characterised by non-haemolytic unconjugated hyperbilirubinemia. It is caused by mutations in the UGT1A1 gene which codes for the enzyme uridine diphosphate glucoronosyl transferase- 1, required for the conjugation and further excretion of bilirubin from the body. Affected individuals are usually asymptomatic apart from the jaundice and investigations reveal isolated indirect hyperbilirubinemia. It can be conveniently diagnosed by evaluating the response to phenobarbitone in terms of fall in bilirubin levels...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28891979/determination-of-the-main-nucleosides-and-nucleobases-in-natural-and-cultured-ophiocordyceps-xuefengensis
#17
Juan Zou, Ling Wu, Zheng-Mi He, Ping Zhang, Zuo-Hong Chen
Ophiocordyceps xuefengensis, a recently described species of Ophiocordycepsthat is associated with the larvae of Phassusnodus (Hepialidae) in the living root or trunk of the medicinal plant Clerodendrumcyrtophyllum, isthe largest known Cordycepsspecies and is recognized as a desirable alternative for natural Ophiocordycepssinensis. This study investigated the main nucleosides and nucleobases in natural and cultured Ophiocordycepsxuefengensis. The contents of the nucleosides and nucleobases in the natural and cultured samples were determined by reverse phase HPLC...
September 11, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28888563/bilirubin-uridine-diphosphate-glucuronosyltransferase-polymorphism-as-a-risk-factor-for-prolonged-hyperbilirubinemia-in-japanese-preterm-infants
#18
Takahide Yanagi, Sayuri Nakahara, Yoshihiro Maruo
OBJECTIVE: To determine whether a variant of the bilirubin uridine diphosphate-glucuronosyltransferase gene (UGT1A1*6) is a risk factor for prolonged hyperbilirubinemia in preterm infants. STUDY DESIGN: UGT1A1 genotypes in 46 Japanese preterm infants (<37 weeks of gestation) were compared with UGT1A1 genotypes in 38 control infants, using polymerase chain reaction-direct sequencing. Prolonged unconjugated hyperbilirubinemia was defined as serum total bilirubin concentration of >150 µmol/L (8...
September 6, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28884627/apoptosis-mediated-neurotoxicity-and-altered-gene-expression-induced-by-silver-nanoparticles
#19
Maryam Ghooshchian, Parvin Khodarahmi, Farzaneh Tafvizi
Although not fully recognized, the neurotoxic effects of silver nanoparticles (Ag-NPs) are thought to occur through induction of oxidative stress and apoptosis. To investigate the exact underlying molecular mechanism, we aimed to explore the apoptotic effects of intraperitoneal injection of Ag-NPs and investigated the possible attributed changes in the mRNA expression of Bcl-2 and Bax genes in the rat hippocampus. Two in vivo sets of experiments, one to demonstrate apoptosis and the other to assess gene expression, were conducted on male Wistar rats...
January 1, 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/28882571/genome-shuffling-improved-the-nucleosides-production-in-cordyceps-kyushuensis
#20
Yanming Wang, Guoying Zhang, Xuan Zhao, Jianya Ling
Genome shuffling was first applied to improve the production of nucleosides in Cordyceps kyushuensis. Six improved strains were selected for genome shuffling by UV and HNO2 mutagenesis. Ten improved genome shuffling strains with good genetic stability were obtained, among which, the production of cordycepin in R6 was 9.624 times higher than that of the ancestor. While in R18 and R19, the yield of cordycepin, adenosine, guanosine and uridine were all increased greatly compared with the ancestor. Based on the four phenotypes of the content of cordycepin, adenosine, guanosine and uridine, hierarchical clustering analysis (HCA) and principal component analysis (PCA) were applied to infer the relationships between genome shuffling strains and mutants...
September 4, 2017: Journal of Biotechnology
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