Quantitation of endogenous nucleoside triphosphates and nucleosides in human cells by liquid chromatography tandem mass spectrometry

Analytical and Bioanalytical Chemistry
Dominique ThomasN Ferreirós

Abstract

Nucleosides and nucleoside triphosphates are the building blocks of nucleic acids and important bioactive metabolites, existing in all living cells. In the present study, two liquid chromatography tandem mass spectrometry methods were developed to quantify both groups of compounds from the same sample with a shared extraction procedure. After a simple protein precipitation with methanol, the nucleosides were separated with reversed phase chromatography on an Atlantis T3 column while for the separation of the nucleoside triphosphates, an anion exchange column (BioBasic AX) was used. No addition of ion pair reagent was required. A 5500 QTrap was used as analyzer, operating as triple quadrupole. The analytical method for the nucleoside triphosphates has been validated according to the guidelines of the US Food and Drug Administration. The lower limit of quantification values were determined as 10 pg on column (0.5 ng/mL in the injection solution) for deoxyadenosine triphosphate and deoxyguanosine triphosphate, 20 pg (1 ng/mL) for deoxycytidine triphosphate and thymidine triphosphate, 100 pg (5 ng/mL) for cytidine triphosphate and guanosine triphosphate, and 500 pg (25 ng/mL) for adenosine triphosphate und uridine triphosphate resp...Continue Reading

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