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Published on: September 21, 2017
Determination of MDMA and its three metabolites in the rat perfused liver
Bardia Jamali1, Yalda Hosseinzadeh Ardakani, Alireza Foroumadi
1Biopharmaceutics and Pharmacokinetics Division, Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, Iran.
Abstract:
3,4-Methylenedioxymethamphetamine (MDMA) is one of the most commonly abused illicit drugs in the world. We developed a rapid and simple high-performance liquid chromatography with a fluorescence (FL) detector method to determine MDMA and its metabolites, such as 3,4-methylenedioxyamphetamine (MDA), 4-hydroxy-3-methoxyamphetamine (HMA) and its main unstable metabolite 3,4-dihydroxymethamphetamine (HHMA) besides the internal standards, in a perfusion medium. The separation of analytes was performed at 25°C on a Chromolith® C18 (100 × 4.6 mm) column from Merck (Darmstadt, Germany) without any derivatization. The FL detector wavelength was fixed at 285 nm for excitation and at 320 nm for emission. Acetonitrile:phosphate buffer (0.02 M) at pH = 3 (5:95 v/v) was used as the mobile phase. The elution order was HHMA, HMA, MDA and MDMA with a retention time of 1.7, 2.6, 6.1 and 7.4 min, respectively. The method was validated according to the FDA bioanalytical method validation guideline. The limits of quantifications (LOQs) obtained for MDMA, MDA, HMA and HHMA were 1, 1, 1.5 and 5 ng/mL, respectively. The repeatability of relative standard deviation was <11% (except for LOQs). This method was applied successfully to determine MDMA and its metabolites in rat liver perfusion samples. To our knowledge, this is the first method introduced for the determination of HHMA as a free form with an FL detector.
Insights
This study introduces a new fluorescence detection method for quantifying 3,4-Methylenedioxymethamphetamine (MDMA) and its metabolites, including HHMA, in biological samples. The validated method offers high sensitivity for detecting illicit drug use and metabolism.
Area of Science:
- Analytical Chemistry
- Forensic Toxicology
- Pharmacology
Background:
- Illicit drug abuse, particularly 3,4-Methylenedioxymethamphetamine (MDMA), poses a significant global health challenge.
- Accurate quantification of MDMA and its metabolites is crucial for understanding its pharmacokinetics and for forensic analysis.
- Existing methods may lack the sensitivity or specificity required for detecting all relevant metabolites, especially unstable ones like 3,4-dihydroxymethamphetamine (HHMA).
Purpose of the Study:
- To develop and validate a rapid, simple, and sensitive high-performance liquid chromatography with fluorescence (FL) detection method.
- To quantify MDMA and its key metabolites (MDA, HMA, HHMA) in a perfusion medium.
- To establish a method for the determination of HHMA in its free form using FL detection.
Main Methods:
- High-performance liquid chromatography (HPLC) with a fluorescence (FL) detector.
- Separation on a Chromolith® C18 column at 25°C without derivatization.
- Mobile phase: Acetonitrile:phosphate buffer (0.02 M, pH 3) (5:95 v/v).
- Detection wavelengths: Excitation 285 nm, Emission 320 nm.
Main Results:
- The method successfully separated HHMA, HMA, MDA, and MDMA with retention times of 1.7, 2.6, 6.1, and 7.4 min, respectively.
- Validated limits of quantification (LOQs) were 1 ng/mL for MDMA and MDA, 1.5 ng/mL for HMA, and 5 ng/mL for HHMA.
- Repeatability (RSD) was <11% for all analytes (excluding LOQs).
- The method was successfully applied to rat liver perfusion samples.
Conclusions:
- A novel, validated HPLC-FL method enables sensitive quantification of MDMA and its metabolites in biological matrices.
- This is the first reported method for determining free HHMA using fluorescence detection.
- The method provides a valuable tool for research into MDMA metabolism and toxicology.
