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Showing 1-30 of 30 results for "54917" within Papers
Divya Misra et al.
Physiological chemistry and physics and medical NMR, 40, 67-88 (2008-01-01)
High-Resolution Magic Angle Spinning (HR-MAS) NMR has been employed to characterize various metabolites of human pancreas, liver and brain tissues from trauma cases. The potential usefulness of NMR in identifying the metabolites in human tissues has been explored using a
Alexandros Pechlivanis et al.
Journal of proteome research, 9(12), 6405-6416 (2010-10-12)
Physical exercise modifies animal metabolism profoundly. Until recently, biochemical investigations related to exercise focused on a small number of biomolecules. In the present study, we used a holistic analytical approach to investigate changes in the human urine metabolome elicited by
Reiko Tatewaki et al.
Congenital anomalies, 46(3), 149-154 (2006-08-23)
To clarify the cytogenetic effects of glucose and ketone bodies on the pathogenesis of diabetes-associated congenital anomalies, we cultured cells from gestation-day-8 ICR mouse embryos under the diabetic condition. Cells were cultured in the medium with glucose (300 mg/dL) plus
Rawi Ramautar et al.
Analytical and bioanalytical chemistry, 387(1), 293-301 (2006-11-11)
Organic acids in cerebrospinal fluid (CSF) are potential diagnostic markers for neurological diseases and metabolic disorders. A capillary electrophoretic (CE) method for the direct analysis, i.e., without any sample preparation, of six organic acids in CSF was developed. A capillary
M N Romanelli et al.
Chirality, 8(3), 225-233 (1996-01-01)
The enantiomers of two alpha-tropanyl esters, SM21 (1) and PG9 (2), derived from (+)-R-hyoscyamine, that act by increasing the central cholinergic tone, were obtained by esterification after resolution of the corresponding racemic acids [(-)-S-1, (-)-R-2 and (+)-S-2] and by stereospecific
Chao Gao et al.
Bioresource technology, 115, 75-78 (2011-12-01)
(R)-2-Hydroxybutyric acid ((R)-2-HBA) is an important building block for azinothricin family of antitumour antibiotics and biodegradable poly(2-hydroxybutyric acid). However, optically active (R)-2-HBA could not be produced through microbial fermentation or chemical synthesis. Several biocatalytic methods have been reported for the
K R Kim et al.
Journal of chromatography. A, 874(1), 91-100 (2000-04-18)
An efficient method is described for the simultaneous enantiomeric separation of 18 different racemic 2-hydroxy acids for the determination of their absolute configurations. It involves the conversion of each enantiomer into a diastereomeric O-trifluoroacetylated (S)-(+)-3-methyl-2-butyl ester for the direct separation
Erin W Lloyd et al.
Journal of analytical toxicology, 44(4), 354-361 (2019-11-30)
The variation in drug concentrations in human head hair from 22 donors was measured using a synthetic hair matrix (SMx™ hair). This matrix is being reported for the first time as a calibrator for an endogenous substance. In comparison to
"Prediction is very hard, especially about the future": new biomarkers for type 2 diabetes?
William L Lowe et al.
Diabetes, 62(5), 1384-1385 (2013-04-25)
Chao Gao et al.
Bioresource technology, 102(7), 4595-4599 (2011-02-08)
Optically active D-2-hydroxybutanoate is an important building block intermediate for medicines and biodegradable poly(2-hydroxybutanoate). Kinetic resolution of racemic 2-hydroxybutanoate may be a green and desirable alternative for D-2-hydroxybutanoate production. In this work, D-2-hydroxybutanoate at a high concentration (0.197 M) and
Walter E Gall et al.
PloS one, 5(5), e10883-e10883 (2010-06-09)
Insulin resistance is a risk factor for type 2 diabetes and cardiovascular disease progression. Current diagnostic tests, such as glycemic indicators, have limitations in the early detection of insulin resistant individuals. We searched for novel biomarkers identifying these at-risk subjects.
Ele Ferrannini et al.
Diabetes, 62(5), 1730-1737 (2012-11-20)
Metabolomic screening of fasting plasma from nondiabetic subjects identified α-hydroxybutyrate (α-HB) and linoleoyl-glycerophosphocholine (L-GPC) as joint markers of insulin resistance (IR) and glucose intolerance. To test the predictivity of α-HB and L-GPC for incident dysglycemia, α-HB and L-GPC measurements were
Jin Hwan Lee et al.
Bioscience, biotechnology, and biochemistry, 68(3), 714-720 (2004-04-02)
All four stereoisomers of 3-amino-2-hydroxybutanoic acids were been obtained as single enantiomers via stereospecific reactions from D-gulonic acid gamma-lactone and D-glucono-delta-lactone.
S G Hasselbalch et al.
The American journal of physiology, 268(6 Pt 1), E1161-E1166 (1995-06-01)
The blood-brain barrier (BBB) permeability for glucose and beta-hydroxybutyrate (beta-OHB) was studied by the intravenous double-indicator method in nine healthy subjects before and after 3.5 days of starvation. In fasting, mean arterial plasma glucose decreased and arterial concentration of beta-OHB
Shin Nishiumi et al.
PloS one, 7(7), e40459-e40459 (2012-07-14)
To improve the quality of life of colorectal cancer patients, it is important to establish new screening methods for early diagnosis of colorectal cancer. We performed serum metabolome analysis using gas-chromatography/mass-spectrometry (GC/MS). First, the accuracy of our GC/MS-based serum metabolomic
J P Carlier et al.
Letters in applied microbiology, 25(5), 371-374 (1998-01-07)
The present investigation examined DL-threonine, D-threonine and 2-oxobutyrate conversion into propionate and 2-hydroxybutyrate by various type strains and clinical isolates of Fusobacterium. Except for Fus. naviforme, the type strains were able to produce varying degrees of propionate and/or 2-hydroxybutyrate from
R Guerranti et al.
Biochimica et biophysica acta, 1568(1), 45-52 (2001-12-04)
Rat liver L-threonine dehydrogenase is a mitochondrial enzyme which transforms L-threonine either into aminoacetone or into acetyl-CoA. We show that it is inhibited by several fatty acids and their derivatives: short chain fatty acids, L-2-hydroxybutyrate and D-3-hydroxybutyrate, long chain fatty
M N Romanelli et al.
Chirality, 8(8), 579-584 (1996-01-01)
The enantiomers of 3-alpha-tropyl 2-(phenylthio)butyrate (SM32, 1) were prepared by chiral synthesis and tested for analgesic, cognition-enhancing, and ACh-releasing properties. They show enantioselectivity in some of the tests, the eutomer being related in configuration to R-(+)-hyoscyamine.
I A Tarakanov et al.
Rossiiskii fiziologicheskii zhurnal imeni I.M. Sechenova, 84(4), 300-308 (1998-09-22)
Effects of alpha-hydroxybutyrate (GHB) involved a decrease in the respiration rate and subsequent periodic breathing in anesthetised cats and rats. No considerable changes occurred in systemic circulation. There were, however, some differences between the species in the patterns of respiratory
Ferhan Siddiqi et al.
Biochemistry, 44(25), 9013-9021 (2005-06-22)
Mandelate racemase (MR, EC 5.1.2.2) from Pseudomonas putida catalyzes the Mg(2+)-dependent 1,1-proton transfer that interconverts the enantiomers of mandelate. Crystal structures of MR reveal that the phenyl group of all ground-state ligands is located within a hydrophobic cavity, remote from
K.J. Hale et al.
Tetrahedron Letters, 36, 6965-6965 (1995)
Inhibition of citrate oxidation in vitro by 2-hydroxybutyrate and 4-hydroxybutyrate in cerebral cortex of young rats.
C S Dutra-Filho et al.
Biochemical Society transactions, 23(2), 229S-229S (1995-05-01)
[Methionine malabsorption syndrome].
T Bamba et al.
Ryoikibetsu shokogun shirizu, (19 Pt 2)(19 Pt 2), 576-577 (1998-06-30)
Richard S Lord et al.
Alternative medicine review : a journal of clinical therapeutic, 13(3), 205-215 (2008-10-28)
Modern instrumentation allows the measurement of organic acids in urine in their physiological concentration ranges. Eight of the compounds that are reported can serve as markers for specific toxicant exposure or detoxification challenges. Xylene exposure causes elevation of 2-methylhippurate, and
Iola F Duarte et al.
NMR in biomedicine, 20(4), 401-412 (2006-12-07)
This paper reports the first application of high-resolution (1)H NMR spectroscopy to the plasma of five juveniles with glycogen storage disease type 1a (GSD1a), permitting the characterisation of the plasma metabolic profile and the identification of alterations relative to a
Philip J Saylor et al.
Clinical cancer research : an official journal of the American Association for Cancer Research, 18(13), 3677-3685 (2012-05-17)
Androgen deprivation therapy (ADT) for prostate cancer causes an increase in fasting insulin and adverse changes in body composition and serum lipid profile. It is unknown what other metabolic alterations are caused by ADT. To better characterize the metabolic effects
Carl J Yeoman et al.
PloS one, 8(2), e56111-e56111 (2013-02-14)
Bacterial vaginosis (BV) is the most common vaginal disorder of reproductive-age women. Yet the cause of BV has not been established. To uncover key determinants of BV, we employed a multi-omic, systems-biology approach, including both deep 16S rRNA gene-based sequencing
Carlos Calderón et al.
Journal of chromatography. A, 1487, 194-200 (2017-02-01)
Chiral short chain aliphatic hydrocarboxylic acids (HCAs) are common compounds being part of different biological processes. In order to control and understand these processes is of pivotal importance to determine the identity of the involved enantiomer or their enantiomeric ratio.
Si Jae Park et al.
Applied microbiology and biotechnology, 93(1), 273-283 (2011-08-16)
We have previously reported in vivo biosynthesis of polylactic acid (PLA) and poly(3-hydroxybutyrate-co-lactate) [P(3HB-co-LA)] employing metabolically engineered Escherichia coli strains by the introduction of evolved Clostridium propionicum propionyl-CoA transferase (Pct(Cp)) and Pseudomonas sp. MBEL 6-19 polyhydroxyalkanoate (PHA) synthase 1 (PhaC1(Ps6-19)).
Shuvendu Das et al.
Biotechnology progress, 26(3), 607-615 (2009-12-17)
Glycolate oxidase (GO; (S)-2-hydroxyacid oxidase, EC 1.1.3.15) is a flavin mononucleotide (FMN)-dependent enzyme, which catalyzes the oxidation of 2-hydroxy carboxylic acids to the corresponding 2-keto acids. Catalase has been used as cocatalyst to decompose hydrogen peroxide produced in the reaction
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