CN
Search Within
222526
应用筛选条件
关键词:'222526'
显示 1-30 共 37 条结果 关于 "222526" 范围 论文
Shwetha Nanjundaiah et al.
Applied biochemistry and biotechnology, 178(1), 58-75 (2015-10-01)
Coffee processing industries generate caffeine-containing waste that needs to be treated and decaffeinated before being disposed. Five fungal isolates obtained on caffeine-containing mineral media were tested for their ability to utilize caffeine at high concentrations. An isolate identified as Fusarium
Sandrine Derkenne et al.
Pharmacogenetics and genomics, 15(7), 503-511 (2005-06-23)
Pharmacokinetics of theophylline was investigated in Cyp1(+/+) wild-type mice, Cyp1a1(-/-) and Cyp1a2(-/-) knockout mice, and humanized hCYP1A1_1A2 mice lacking either the mouse Cyp1a1 or Cyp1a2 gene. Animals received a single dose of theophylline (8 mg/kg i.p.), either alone or pretreated
W L Macias et al.
Pharmacotherapy, 18(6), 1237-1248 (1998-12-17)
To test whether olanzapine, an atypical antipsychotic, is an inhibitor of cytochrome P450 (CYP) 1A2 activity, we conducted a drug interaction study with theophylline, a known CYP1A2 substrate. Two-way, randomized, crossover study. Clinical research laboratory. Nineteen healthy males (16 smokers
H Konishi et al.
European journal of clinical pharmacology, 46(4), 309-312 (1994-01-01)
The effect of fluconazole, an antimycotic that inhibits cytochrome P-450-mediated drug metabolism, on theophylline kinetics and the production of its metabolites were compared with those of enoxacin in 5 healthy subjects. All subjects received a single oral dose of 240
Jin A Sohn et al.
British journal of clinical pharmacology, 83(6), 1279-1286 (2016-12-21)
The purpose of this study was to explore clinical markers reflecting developmental changes in drug clearance by preterm infants. Preterm infants administered aminophylline or theophylline to treat apnoea of prematurity were enrolled in this study. Trough and one of 2 h
Sang Won Lee et al.
Biochemistry, 49(13), 2943-2951 (2010-03-11)
RNAs often exhibit a high degree of conformational dynamics and heterogeneity, leading to a rugged energy landscape. However, the roles of conformational heterogeneity and rapid dynamics in molecular recognition or RNA function have not been extensively elucidated. Ultrafast time-resolved fluorescence
M Sarkar et al.
Antimicrobial agents and chemotherapy, 34(4), 594-599 (1990-04-01)
Some quinolone antibiotics cause increases in levels of theophylline in plasma that lead to serious adverse effects. We investigated the mechanism of this interaction by developing an in vitro system of human liver microsomes. Theophylline (1,3-dimethylxanthine) was incubated with human
H Konishi et al.
Biomedical chromatography : BMC, 8(4), 189-192 (1994-07-01)
An analytical method has been developed with which to measure the microsomal enzyme activities responsible for oxidative theophylline metabolism. Three metabolites: 3-Methylxanthine (3-MX); 1-methylxanthine (1-MX); 1,3-dimethyluric acid (1,3-DMU), with acetaminophen as an internal standard (IS), were separated by solid phase
Binxing Zhou et al.
BMC microbiology, 18(1), 53-53 (2018-06-06)
Pu-erh tea is a traditional Chinese tea and produced by natural solid-state fermentation. Several studies show that the natural microbiota influence caffeine level in pu-erh tea. Our previous research also found that the caffeine declined significantly (p < 0.05) in the fermentation
T Tateishi et al.
Pediatric research, 45(1), 66-70 (1999-01-16)
We investigated the developmental changes in the pattern of urinary metabolites of theophylline, a substrate for CYP1A2, to study when CYP1A2, which is absent in the perinatal period, fully develops during childhood. The urinary ratios of three metabolites (1-methyluric acid
Khalid H R Algharrawi et al.
Microbial cell factories, 14, 203-203 (2015-12-23)
Methylxanthines are natural and synthetic compounds found in many foods, drinks, pharmaceuticals, and cosmetics. Aside from caffeine, production of many methylxanthines is currently performed by chemical synthesis. This process utilizes many chemicals, multiple reactions, and different reaction conditions, making it
Chi Li Yu et al.
Journal of bacteriology, 191(14), 4624-4632 (2009-05-19)
Pseudomonas putida CBB5 was isolated from soil by enrichment on caffeine. This strain used not only caffeine, theobromine, paraxanthine, and 7-methylxanthine as sole carbon and nitrogen sources but also theophylline and 3-methylxanthine. Analyses of metabolites in spent media and resting
Ling Li et al.
Molecular cell, 80(3), 525-540 (2020-10-18)
Well-balanced and timed metabolism is essential for making a high-quality egg. However, the metabolic framework that supports oocyte development remains poorly understood. Here, we obtained the temporal metabolome profiles of mouse oocytes during in vivo maturation by isolating large number of
Di Sun et al.
Applied microbiology and biotechnology, 104(7), 3025-3036 (2020-02-06)
The widespread use of caffeine in food and drug industries has caused great environmental pollution. Herein, an efficient caffeine-degrading strain Paraburkholderia caffeinilytica CF1 isolated from a tea garden in China can utilize caffeine as its sole carbon and nitrogen source.
G A Soukup et al.
Journal of molecular biology, 298(4), 623-632 (2000-05-02)
In a continuing effort to explore structural and functional dynamics in RNA catalysis, we have created a series of allosteric hammerhead ribozymes that are activated by theophylline. Representative ribozymes exhibit greater than 3000-fold activation upon effector-binding and cleave with maximum
Jung-woo Chae et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 889-890, 44-49 (2012-03-01)
A rapid, specific, and reliable LC-MS/MS-based bioanalytical method was developed and validated in rat plasma for the simultaneous quantitation of theophylline and its four metabolites: 1,3-dimethyluric acid (1,3-DMU), 3-methylxanthine (3-MX), 1-methylxanthine (1-MX), and 1-methyluric acid (1-MU). Chromatographic separation of these
Karsten Nödler et al.
International journal of environmental research and public health, 11(10), 10390-10405 (2014-10-14)
Attenuation of micro-contaminants is a very complex field in environmental science and evidence suggests that biodegradation rates of micro-contaminants in the aqueous environment depend on the water matrix. The focus of the study presented here is the systematic comparison of
H R Ha et al.
British journal of clinical pharmacology, 39(3), 321-326 (1995-03-01)
1. Theophylline metabolism was studied using seven human cytochrome P-450 isoforms (CYPs), namely CYP1A1, 1A2, 2A6, 2B6, 2D6, 2E1 and 3A4, and microsomal epoxide hydroxylase (EH), expressed in human B-lymphoblastoid cell lines. 2. At a high theophylline concentration of 10
B B Rasmussen et al.
Analytical biochemistry, 222(1), 9-13 (1994-10-01)
A method for the quantitation of three metabolites of theophylline, 1-methylxanthine (1 MX), 3-methylxanthine (3MX), and 1,3-dimethyluric acid (13DMU) in human liver microsomes has been developed. The method is based on a simple one-step extraction followed by isocratic, reversed-phase high-performance
S Gates et al.
British journal of clinical pharmacology, 47(3), 299-305 (1999-04-24)
The plasma clearance of theobromine (TB; 3,7-dimethylxanthine) is known to be induced in cigarette smokers. To determine whether TB may serve as a model substrate for cytochrome P450 (CYP) 1A2, or possibly other isoforms, studies were undertaken to identify the
Binxing Zhou et al.
Journal of food science, 85(2), 477-485 (2020-01-07)
Natural microorganisms involved in solid-state fermentation (SSF) of Pu-erh tea have a significant impact on its chemical components. Aspergillus sydowii is a fungus with a high caffeine-degrading capacity. In this work, A. sydowii was inoculated into sun-dried green tea leaves
Shawn K Desai et al.
Journal of the American Chemical Society, 126(41), 13247-13254 (2004-10-14)
Genetic selection provides the most powerful method to assay large libraries of biomolecules for function. However, harnessing the power of genetic selection for the detection of specific, nonendogenous small-molecule targets in vivo remains a significant challenge. The ability to genetically
K Yamamoto et al.
Biological & pharmaceutical bulletin, 19(6), 869-872 (1996-06-01)
To evaluate the risk of neurotoxicity induced by theophylline and its main metabolites, 1-methylxanthine (1-MX), 3-methylxanthine (3-MX), 1,3-dimethyluric acid (1,3-DMUA) and 1-methyluric acid (1-MUA), we compared their convulsive potency to central nervous system (CNS) after intracerebral administration to mice. All
T Ogiso et al.
Biological & pharmaceutical bulletin, 16(2), 163-167 (1993-02-01)
In an attempt to clarify the possible mechanism of the interaction between theophylline (TP) and mexiletine (ME), the elimination kinetics and in vitro metabolism of TP and its metabolites were investigated in rats. The plasma elimination of TP, 1,3-dimethyluric acid
W Cao et al.
Zhongguo yao li xue bao = Acta pharmacologica Sinica, 19(5), 437-439 (1999-06-22)
To study theophylline metabolites pharmacokinetics in patients after a therapeutic dose. Eight adult patients with mild bronchial asthma and normal liver function were infused aminophylline intravenously (6.6 mumol.kg-1). The plasma concentrations of theophylline and its 4 metabolites: 1,3-dimethyluric acid (DMUA)
G J Wijnands et al.
The American journal of medicine, 87(6C), 47S-51S (1989-12-29)
In a three-week study, the metabolism of the bronchodilator theophylline and its major metabolites formed by C-8 oxidation (1,3-dimethyluric acid) and N-demethylation (3-methylxanthine and 1-methyluric acid) was investigated in two healthy volunteers. Metabolic studies were performed following intravenous infusion of
Masayuki Nadai et al.
Life sciences, 81(15), 1175-1182 (2007-09-28)
Whether organic anion and cation transporters are involved in the renal excretion of xanthine derivatives, 3-methylxanthie and enprofylline, remains unclear. In this study, we have investigated the effects of typically predominant substrates for organic anion and cation transporters on the
Binxing Zhou et al.
BMC microbiology, 20(1), 269-269 (2020-08-29)
Methylxanthines, including caffeine, theobromine and theophylline, are natural and synthetic compounds in tea, which could be metabolized by certain kinds of bacteria and fungi. Previous studies confirmed that several microbial isolates from Pu-erh tea could degrade and convert caffeine and
Theophylline metabolism affected by mexiletine.
K L Rost et al.
Clinical pharmacology and therapeutics, 52(1), 107-109 (1992-07-01)
K Ueno et al.
DICP : the annals of pharmacotherapy, 25(7-8), 727-730 (1991-07-01)
The mechanism of an interaction between theophylline and mexiletine hydrochloride was investigated in 6 male inpatients coadministered both drugs and 16 inpatients (13 men, 3 women) administered theophylline only. Serum theophylline and mexiletine concentrations and urinary concentrations of theophylline and
1/2