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Validation of a HPLC Method for Quantification of Thiamine and Its Phosphate Esters in Rat Brain Tissue

Journal of Behavioral and Brain Science 2017年第2期7卷 79-93页

作者： Polliana Toledo Nunes Patrí cia da Silva Oliveira vany ferraz Angela Maria Ribeiro Programa de Pó s-graduaç ã o em Neurociê ncias Laborat&oacute rio de Neurociê ncias Comportamental e Molecular LaNeC Universidade Federal de Minas Gerais Belo Horizonte Brazil Departamento de Quí mica Universidade Federal de Minas Gerais Belo Horizonte Brazil

The present data show a fast and efficient biological sample processing method for the extraction of thiamine (vitamin B1) and its mono-(TMP) and di-(TDP) phosphate esters from hippocampus, thalamus and prefrontal cortex (PFC) and blood sample of the rodents. In addition, using the hippocampus and standards of these three compounds we validated an isocratic fluorescence HPLC procedure for a simultaneous detection of them in a single chromatogram within a total run time of about 12 min. Reproducibility for TDP, TMP and B1 was 2.66%, 4.50% and 7.43% (intraday) and 37.54%, 25.39% and 25.87% (interday), respectively. Recovery assays were between 96.0% and 101.7%. The calibration curves were linear and the concentrations of the three compounds, all in nanomolar range, were determined in the brain areas and in the blood samples. When compared to the current methods in the literature, this new method provides information on essential variables, such as linearity range and limit of detection, reproducibility and stability of thiamine, TMP and TDP in rat brain samples. The present data on sample processing and B1 and its phosphate ester level determinations are the first to be validated using hippocampus samples of rats.

关键词： Thiamine HPLC Rat Brain Samples Validation Method

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