BACKGROUND: Marijuana (Cannabis sativa) is the illicit drug most used by pregnant women, and behavioral and cognitive impairments have been documented in cannabis-exposed offspring. Despite the extensive use of marijuana, very limited information exists as to the consequences of prenatal cannabis exposure on the developing human brain. METHODS: We optimized an in situ hybridization histochemistry technique to visualize mRNA expression in midgestation (weeks 18-22) human fetal specimens from mothers with and without documented evidence of cannabis use during pregnancy. The cannabinoid receptor type 1 (CB(1)) and major dopamine receptor subtypes, D(1) and D(2), were examined in the striatum and mesocorticolimbic structures (amygdala and hippocampus). RESULTS: Adjusting for various covariates, we found a specific reduction, particularly in male fetuses, of the D(2) mRNA expression levels in the amygdala basal nucleus in association with maternal marijuana use. The reduction was positively correlated with the amount of maternal marijuana intake during pregnancy. No significant cannabis-related alterations were detected in the hippocampus or caudal striatum for the D(2), D(1), and CB(1) mRNA levels, although alcohol showed significant contribution to striatal D(1)/D(2) expression. CONCLUSIONS: These human fetal findings suggest that in utero cannabis exposure may impair distinct mesocorticolimbic neural systems that regulate emotional behavior.
BACKGROUND:Marijuana (Cannabis sativa) is the illicit drug most used by pregnant women, and behavioral and cognitive impairments have been documented in cannabis-exposed offspring. Despite the extensive use of marijuana, very limited information exists as to the consequences of prenatal cannabis exposure on the developing human brain. METHODS: We optimized an in situ hybridization histochemistry technique to visualize mRNA expression in midgestation (weeks 18-22) human fetal specimens from mothers with and without documented evidence of cannabis use during pregnancy. The cannabinoid receptor type 1 (CB(1)) and major dopamine receptor subtypes, D(1) and D(2), were examined in the striatum and mesocorticolimbic structures (amygdala and hippocampus). RESULTS: Adjusting for various covariates, we found a specific reduction, particularly in male fetuses, of the D(2) mRNA expression levels in the amygdala basal nucleus in association with maternal marijuana use. The reduction was positively correlated with the amount of maternal marijuana intake during pregnancy. No significant cannabis-related alterations were detected in the hippocampus or caudal striatum for the D(2), D(1), and CB(1) mRNA levels, although alcohol showed significant contribution to striatal D(1)/D(2) expression. CONCLUSIONS: These human fetal findings suggest that in utero cannabis exposure may impair distinct mesocorticolimbic neural systems that regulate emotional behavior.
Authors: Jan Mulder; Lauren Spence; Giuseppe Tortoriello; Jennifer A Dinieri; Mathias Uhlén; Bo Shui; Michael I Kotlikoff; Yuchio Yanagawa; Fabienne Aujard; Tomas Hökfelt; Yasmin L Hurd; Tibor Harkany Journal: Eur J Neurosci Date: 2010-06-07 Impact factor: 3.386
Authors: Diana L Dow-Edwards; Helene Benveniste; Marylou Behnke; Emmalee S Bandstra; Lynn T Singer; Yasmin L Hurd; L R Stanford Journal: Neurotoxicol Teratol Date: 2006 May-Jun Impact factor: 3.763
Authors: S C Jaques; A Kingsbury; P Henshcke; C Chomchai; S Clews; J Falconer; M E Abdel-Latif; J M Feller; J L Oei Journal: J Perinatol Date: 2014-01-23 Impact factor: 2.521