Methamphetamine is a commonly abused psychostimulant that causes addiction and is often abused by pregnant women. Acute or chronic administration of methamphetamine elevates the levels of the extracellular monoamine neurotransmitters, such as dopamine. The aim of the present study was to show whether prenatal exposure to methamphetamine (5mg/kg, entire gestation) or saline in Wistar rats induces changes in dopamine levels and its metabolites in the nucleus accumbens, and in behavior (locomotor activity, rearing, and immobility) after the administration of a challenge dose of methamphetamine (1mg/kg) or saline in male offspring. We found that adult offspring prenatally exposed to methamphetamine had higher basal levels of dopamine (about 288%), dihydroxyphenylacetic acid (about 67%) and homovanillic acid (about 74%) in nucleus accumbens. An increased basal level of dopamine corresponds to lower basal immobility in offspring prenatally exposed to methamphetamine. The acute injection of methamphetamine in adulthood increased the level of dopamine in the nucleus accumbens, which is related to an increase of locomotion and rearing (exploration). In addition, prenatally methamphetamine-exposed rats showed higher response to the challenge dose of methamphetamine, when compared to prenatally saline-exposed rats. In conclusion, rats exposed to methamphetamine in utero have shown changes in the mesolimbic dopaminergic system and were more sensitive to the administration of the acute dose of methamphetamine in adulthood.
- MeSH
- čas MeSH
- chování zvířat fyziologie účinky léků MeSH
- dopamin metabolismus MeSH
- inhibitory vychytávání adrenergních neurotransmiterů toxicita MeSH
- krysa rodu rattus MeSH
- kyselina 3,4-dihydroxyfenyloctová metabolismus MeSH
- kyselina homovanilová metabolismus MeSH
- methamfetamin toxicita MeSH
- modely nemocí na zvířatech MeSH
- nervové dráhy patofyziologie růst a vývoj účinky léků MeSH
- nucleus accumbens patofyziologie růst a vývoj účinky léků MeSH
- pátrací chování fyziologie účinky léků MeSH
- pohybová aktivita fyziologie účinky léků MeSH
- tegmentum mesencephali - area ventralis patofyziologie růst a vývoj účinky léků MeSH
- těhotenství MeSH
- vztah mezi dávkou a účinkem léčiva MeSH
- zpožděný efekt prenatální expozice metabolismus patofyziologie patologie MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- mužské pohlaví MeSH
- těhotenství MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- práce podpořená grantem MeSH