salsolinol/musa balbisiana

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Oxidation of salsolinol by banana pulp polyphenol oxidase and its kinetic synergism with dopamine.

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Salsolinol, a tethrahydroisoquinoline present in banana and biosynthesized from dopamine, was oxidized by banana pulp polyphenol oxidase to its corresponding salsolinol-o-quinone. This oxidation was pH-dependent and showed a maximum at acidic pH values. At physiological pH of 5.0, the values

Identification of salsolinol as a major dopamine metabolite in the banana.

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Chip electrophoresis of active banana ingredients with label-free detection utilizing deep UV native fluorescence and mass spectrometry.

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In the present work, we report on a rapid and straightforward approach for the determination of biologically active compounds in bananas applying microchip electrophoresis (MCE). For this purpose, we applied label-free detection utilizing deep UV fluorescence detection with excitation at 266 nm.

Influence of food intake on the enantiomeric composition of urinary salsolinol in man.

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Salsolinol is present in human fluids and tissues as well as in foods and beverages. It was shown previously that the R enantiomer of salsolinol predominates in human urine, whereas the S enantiomer predominates in Port wine. An R/S ratio very near to 1 was found in dried banana, a food particularly

Quantification of salsolinol enantiomers by stable isotope dilution liquid chromatography with tandem mass spectrometric detection.

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Salsolinol, 1-methyl-6,7-dihydroxy-2,3,4,5-tetrahydroisoquinoline (SAL), is a precursor of a Parkinsonian neurotoxin, N-methysalsolinol (N-methyl-SAL). Previous studies have shown that individual enantiomers of N-methyl-SAL possess distinct neurotoxicological properties. In this work, a chiral

Gas chromatographic/mass spectrometric methodology for simultaneous assay of salsolinol, dopamine, norepinephrine, dihydroxyphenylacetic acid and dihydroxyphenylethanol.

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Synthesis of deuterated (2H4)salsolinol from (2H4)dopamine via a Pictet-Spengler condensation is described. This (2H4)salsolinol is an ideal internal standard to determine picomole (ng) amounts of salsolinol (SAL) in a variety of sample types including urine, plasma, beverages and fruits. The

Determination of the enantiomeric composition of salsolinol in biological samples by high-performance liquid chromatography with electrochemical detection.

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The enantiomers of salsolinol were completely separated as diastereoisomeric derivatives, after reaction with S-1-(1-naphthyl)ethyl isothiocyanate, by reversed-phase high-performance liquid chromatography and quantified by electrochemical detection. Good calibration curves were obtained for the

Mechanism of enantioseparation of salsolinols, endogenous neurotoxins in human brain, with ion-pair chromatography using beta-cyclodextrin as a mobile phase additive.

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A novel method for direct separation of the enantiomers of salsolinol and N-methylsalsolinol was devised. The enantiomers were completely separated with ion-pair chromatography on a reversed-phase column with beta-cyclodextrin as a chiral mobile phase additive and sodium 1-heptanesulfonate as a

Ratio of the R and S enantiomers of salsolinol in food and human urine.

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Salsolinol is present in human fluids and tissues as well as in some foods and beverages. It was found previously that the R enantiomer of salsolinol predominates in human urine whereas the S enantiomer predominates in Port wine. In this study a new methodology for measuring the proportion of the R

Salsolinol, a naturally occurring tetrahydroisoquinoline alkaloid, induces DNA damage and chromosomal aberrations in cultured Chinese hamster lung fibroblast cells.

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Salsolinol (SAL) is a tetrahydroisoquinoline neurotoxin that has been speculated to contribute to pathophysiology of Parkinson's disease and chronic alcoholism. The compound is also found in certain beverages and food stuffs, including soy sauce, beer and bananas. Despite potential human exposure to

A critical evaluation of influence of ethanol and diet on salsolinol enantiomers in humans and rats.

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BACKGROUND (R/S)-Salsolinol (SAL), a condensation product of dopamine (DA) with acetaldehyde, has been speculated to have a role in the etiology of alcoholism. Earlier studies have shown the presence of SAL in biological fluids and postmortem brains from both alcoholics and nonalcoholics. However,

Discovery and Validation of Banana Intake Biomarkers Using Untargeted Metabolomics in Human Intervention and Cross-sectional Studies.

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Banana is one of the most widely consumed fruits in the world. However, information regarding its health effects is scarce. Biomarkers of banana intake would allow a more accurate assessment of its consumption in nutrition studies.Using an untargeted

Metabolomic analyses of banana during postharvest senescence by 1H-high resolution-NMR.

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Banana is a tropical fruit widely accepted by people over the world. Its chemical composition is critical for its organoleptic properties and nutritional value. In this work, the metabolite changes during postharvest senescence were investigated using NMR spectroscopy. The 1D and 2D NMR

Biomarkers of intake for tropical fruits

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Consumption of fruit and vegetable is a key component of a healthy and sustainable diet. However, their accurate dietary assessment remains a challenge. Due to errors in self-reporting methods, the available dietary information is usually biased. Biomarkers of intake constitute objective tools to

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