当前位置： SCI文献检索 > JOURNAL OF PHARMACOLOGICAL AND TOXICOLOGICAL METHODS期刊下所有文献 > Determination of dopamine concentrations in brain extracellular fluid using microdialysis with short sampling intervals, analyzed by ultra high performance liquid chromatography tandem mass spectrometry.

Determination of dopamine concentrations in brain extracellular fluid using microdialysis with short sampling intervals, analyzed by ultra high performance liquid chromatography tandem mass spectrometry.

Abstract：

INTRODUCTION:An increase in striatal dopamine is considered essential for the rewarding and reinforcing effects of drugs of abuse. We have developed and validated an ultra high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) method for the analysis of dopamine in rat brain extracellular fluid (ECF) sampled with microdialysis. The method was applied to monitor changes in dopamine concentrations over time after an intravenous bolus injection of heroin. METHODS:Dopamine and dopamine-d3 were analyzed using a 2.1×100mm Aquity T3 column, 1.7μm particle size, with a formic acid and methanol gradient. The run time of the method was 2.5min including equilibration time. RESULTS:The method had an LOQ of 0.15ng/mL, which equals 0.55pg on column. The calibration curves were linear in the tested area of 0.15 to 16ng/mL. Inter-assay coefficients of variation varied between 5-17%, with an accuracy expressed as bias of -10 to 5%. The intra-assay coefficients of variation varied between 9-15%, with an accuracy of -3-7%. DISCUSSION:Heroin metabolism is very rapid. Sampling intervals of only 2min were thus required to obtain an adequate number of samples of dopamine analysis accompanying the concentration-time profile of opioids in the brain. Applying a flow of 2μL/min, 4μL of dialysate were sampled at 2min intervals, in 7μL internal standard. The injection volume onto the UPLC column was 10μL. Analyses of microdialysate samples from a rat given heroin i.v. showed that it was possible to measure baseline levels and rapid changes in dopamine concentrations with very short sampling periods.

journal_name

J Pharmacol Toxicol Methods

journal_title

Journal of pharmacological and toxicological methods

authors

Gottås A,Ripel Å,Boix F,Vindenes V,Mørland J,Øiestad EL

doi

10.1016/j.vascn.2015.06.002

subject

Has Abstract

pub_date

2015-07-01 00:00:00

pages

75-9

eissn

1056-8719

issn

1873-488X

pii

S1056-8719(15)00071-4

journal_volume

74

pub_type

杂志文章

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