Long-term behavioral consequences of prenatal MDMA exposure.
The current study sought to determine whether prenatal 3,4-methylenedioxy-N-methamphetamine (MDMA) exposure from E14-20 in the rat resulted in behavioral sequelae in adult offspring. Prenatal MDMA exposure results in increased dopaminergic fiber density in the prefrontal cortex, striatum and nucleus accumbens of young rats. Since these areas are critical in response to novelty, reward, attention and locomotor activity, we hypothesized that prenatal MDMA exposure would produce significant changes in the performance of tasks that examine such behaviors in adult rats. Adult rats prenatally exposed to MDMA exhibited greater activity and spent more time in the center during a novel open field test as compared to controls. This increased activity was not reflected in normal home cage activity. Prenatal exposure to MDMA did not affect feeding or food reward. It did not alter cocaine self-administration behaviors, nor did it have an effect on the locomotor response to amphetamine challenge. Finally, while prenatal MDMA did not affect performance in the radial arm maze or the Morris water maze (MWM), these animals demonstrated altered performance in a cued MWM paradigm. Prenatal MDMA exposure resulted in perseverative attendance to a hanging cue when the platform in the MWM was removed as compared to controls. Together, these data demonstrate that prenatal exposure to MDMA results in a behavioral phenotype in adult rats characterized by reduced anxiety, a heightened response to novelty, and "hyperattentiveness" to environmental cues during spatial learning.
Thompson
Valerie B
VB
Neuroscience Graduate Program, University of Cincinnati, 231 Albert Sabin Way, CVC Room 5940, ML-0537, Cincinnati, OH 45267, USA. v-thompson@hotmail.com
Heiman
Justin
J
Chambers
James B
JB
Benoit
Stephen C
SC
Buesing
William R
WR
Norman
Mantana K
MK
Norman
Andrew B
AB
Lipton
Jack W
JW
D000704:Analysis of Variance; D000818:Animals; D001245:Association Learning / Q000187:drug effects; D001288:Attention / Q000187:drug effects; D001522:Behavior, Animal / Q000187:drug effects*; D003042:Cocaine / Q000494:pharmacology; D003423:Critical Period, Psychological; D018765:Dopamine Uptake Inhibitors / Q000494:pharmacology; D005106:Exploratory Behavior / Q000187:drug effects*; D005260:Female; D005865:Gestational Age; D008297:Male; D018782:Maze Learning / Q000187:drug effects; D008570:Memory, Short-Term; D009043:Motor Activity / Q000187:drug effects; D018817:N-Methyl-3,4-methylenedioxyamphetamine / Q000633:toxicity*; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects; D011897:Random Allocation; D051381:Rats; D012646:Self Administration; D018490:Serotonin Agents / Q000633:toxicity*; D013037:Spatial Behavior / Q000187:drug effects*; D018709:Statistics, Nonparametric
D018765:Dopamine Uptake Inhibitors; D018490:Serotonin Agents; D003042:Cocaine; D018817:N-Methyl-3,4-methylenedioxyamphetamine