Volume 13, Issue 7 p. 1371-1382
RESEARCH ARTICLE

Assessment of biological matrices for the detection of in utero cannabis exposure

Marta Concheiro

Marta Concheiro

John Jay College of Criminal Justice, City University of New York, New York, NY, USA

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Frank Martin Gutierrez

Frank Martin Gutierrez

John Jay College of Criminal Justice, City University of New York, New York, NY, USA

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Alejandro Ocampo

Alejandro Ocampo

John Jay College of Criminal Justice, City University of New York, New York, NY, USA

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Elena Lendoiro

Elena Lendoiro

Sección de Toxicología, Instituto de Ciencias Forenses, Universidade de Santiago de Compostela, Santiago de Compostela, Spain

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Eva González-Colmenero

Eva González-Colmenero

Sección de Neonatología, Complejo Hospitalario Universitario de Vigo, Vigo, Spain

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Ana Concheiro-Guisán

Ana Concheiro-Guisán

Sección de Neonatología, Complejo Hospitalario Universitario de Vigo, Vigo, Spain

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Patricia Peñas-Silva

Patricia Peñas-Silva

Sección de Ginecología y Obstetricia, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain

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Manuel Macías-Cortiña

Manuel Macías-Cortiña

Sección de Ginecología y Obstetricia, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain

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Angelines Cruz-Landeira

Angelines Cruz-Landeira

Sección de Toxicología, Instituto de Ciencias Forenses, Universidade de Santiago de Compostela, Santiago de Compostela, Spain

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Manuel López-Rivadulla

Manuel López-Rivadulla

Sección de Toxicología, Instituto de Ciencias Forenses, Universidade de Santiago de Compostela, Santiago de Compostela, Spain

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Ana de-Castro-Ríos

Corresponding Author

Ana de-Castro-Ríos

Sección de Toxicología, Instituto de Ciencias Forenses, Universidade de Santiago de Compostela, Santiago de Compostela, Spain

Correspondence

Ana de-Castro-Ríos, Toxicology Service, Institute of Forensic Sciences, Faculty of Medicina, Universidade de Santiago de Compostela C/San Francisco s/n, Santiago de Compostela 15782, Spain.

Email: [email protected]

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First published: 22 March 2021
Citations: 2

Funding information: Plan Nacional Sobre Drogas, Ministerio de Sanidad, Servicios Sociales e Igualdad, Gobierno de España, Grant/Award Number: 2016I005; Consellería de Cultura, Educación e Ordenación Universitaria, Xunta de Galicia, Grant/Award Number: ED481D-2019/025

Abstract

Cannabis consumption has been increasing worldwide among pregnant women. Due to the negative effects of prenatal cannabis exposure, it is necessary to develop an objective, sensitive, and specific method to determine cannabinoids use during pregnancy. In this study, we compared four different biological samples, maternal hair, meconium, umbilical cord, and placenta, for the detection of in utero cannabis exposure. The biological samples were collected from 627 mother–newborn dyads. All hair and meconium samples were analyzed, and umbilical cord and placenta if hair and/or meconium were positive for cannabinoids. Meconium and hair showed to complement each other, with an agreement between hair and meconium results of 96.7% but only 34.3% if just positive results were considered. Umbilical cord and placenta results showed a better agreement with meconium (91.3% and 92.6%, respectively) than with hair (39.1% and 34.6%, respectively). The predominant metabolites in meconium were 11-nor-carboxy-THC (THCCOOH) and 8,11-dihydroxy-THC (diOHTHC), and in umbilical cord and placenta was THCCOOH-glucuronide. Cannabidiol (CBD) and cannabinol (CBN) were detected in meconium but not in any umbilical cord or placenta. For the first time, prenatal marijuana exposure was analyzed and compared in paired hair, meconium, umbilical cord, and placental samples. Hair and meconium positivity rate was similar, but a more sensitive and specific analytical method for the hair may resolve discrepancies between the matrices. Umbilical cord and placenta may be considered suitable alternative matrices to meconium through the determination of THCCOOH-glucuronide as a biomarker of cannabis exposure.