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Published on: April 23, 2019
Drugs of abuse testing in meconium
Joey Gareri1, Julia Klein, Gideon Koren
1Motherisk Program, Division of Clinical Pharmacology/Toxicology, Hospital for Sick Children, Toronto, University of Toronto, Toronto, Ontario, Canada.
Insights
Meconium analysis offers a sensitive method for detecting prenatal drug exposure, aiding in the diagnosis of Fetal Alcohol Spectrum Disorder (FASD) and other substance-related neonatal health issues.
Area of Science:
- Neonatal Health
- Toxicology
- Fetal Development
Background:
- Prenatal substance abuse significantly impacts neonatal health and development.
- Meconium is a unique fetal matrix reflecting long-term prenatal metabolism.
- Traditional matrices for assessing prenatal exposure have limitations.
Purpose of the Study:
- To highlight the utility of meconium analysis for detecting prenatal drug exposure.
- To discuss advancements in diagnosing Fetal Alcohol Spectrum Disorder (FASD) using meconium biomarkers.
- To emphasize meconium as an ideal matrix for fetal drug exposure determination.
Main Methods:
- Analysis of fatty acid ethyl esters in meconium for fetal alcohol exposure.
- Immunoassay screening for illicit and licit drug exposure in meconium.
- Gas Chromatography-Mass Spectrometry (GCMS) and Liquid Chromatography-Mass Spectrometry (LCMS) for confirmation.
Main Results:
- Meconium analysis provides higher sensitivity, easier collection, and a wider detection window compared to traditional methods.
- Fatty acid ethyl esters in meconium show promise as biomarkers for fetal alcohol exposure.
- Meconium analysis enables screening and confirmation of various prenatal drug exposures.
Conclusions:
- Meconium is an ideal matrix for assessing fetal drug exposure due to its long metabolic history and ease of collection.
- Advanced meconium analysis methods facilitate the diagnosis of conditions like FASD.
- Meconium analysis is crucial for understanding and addressing the impact of prenatal substance abuse on neonates.
Abstract:
Prenatal substance abuse is an ongoing concern with significant impact on neonatal health and development across socioeconomic lines. Meconium, passed by neonates during their first post-natal bowel movements, is a matrix unique to the developing fetus and contains a long history of prenatal metabolism. Over the last two decades, the use of meconium as a matrix for assessing prenatal exposure to drugs of abuse has yielded methods exhibiting higher sensitivity, easier collection, and a larger window of detection than traditional matrices. Recently, a method has been developed for the analysis of fatty acid ethyl esters in meconium as a biomarker of fetal alcohol exposure, potentially facilitating the future diagnosis of Fetal Alcohol Spectrum Disorder in situations where gestational alcohol consumption history is unknown. Screening for prenatal exposure to illicit and abused licit drugs in meconium is possible by use of a variety of immunoassay methods with conformational analysis usually occurring by GCMS or LCMS. In spite of increased sample preparation time relative to blood and urine, the long metabolic history, coupled with the ease and wide window of collection of meconium make it the ideal matrix for determining fetal drug exposure.
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