Exposure to methamphetamine during first and second half of prenatal period and its consequences on cognition after long-term application in adulthood
Language English Country Czech Republic Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
25669685
DOI
10.33549/physiolres.932927
PII: 932927
Knihovny.cz E-resources
- MeSH
- Maze Learning drug effects MeSH
- Cognition drug effects MeSH
- Methamphetamine administration & dosage toxicity MeSH
- Random Allocation MeSH
- Rats, Wistar MeSH
- Retention, Psychology drug effects MeSH
- Central Nervous System Stimulants administration & dosage toxicity MeSH
- Pregnancy MeSH
- Prenatal Exposure Delayed Effects * MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Pregnancy MeSH
- Female MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Methamphetamine MeSH
- Central Nervous System Stimulants MeSH
It is known that psychostimulants including methamphetamine (MA) have neurotoxic effect, especially, if they are targeting CNS during its critical periods of development. The present study was aimed on evaluation of cognitive changes following scheduled prenatal MA exposure in combination with long-term exposure in adulthood of male rats. Two periods of gestation were targeted: 1(st) half - the embryonic day (ED) 1-11 and 2(nd) half - ED 12-22. Rat mothers received subcutaneously a daily injection of MA (5 mg/kg) or saline (SAL, 1 ml/kg) throughout scheduled periods. Male offspring were tested for cognitive changes in the Morris Water Maze (MWM) in adulthood. Each day of the experiment animals received an injection of MA (1 mg/kg) or SAL (1 ml/kg) during 12 days. Our results demonstrated that in the group of animals exposed to the drug during ED 1-11, neither prenatal MA exposure, nor adult MA treatment changed the performance in the MWM test. Only the velocity was increased in group with long-term MA treatment (SAL/MA and MA/MA). In the group of animals exposed to the drug during ED 12-22, rats exposed to MA prenatally and also in adulthood (MA/MA) swam faster but learned the position of the platform slower in the Place Navigation Test than animals exposed to SAL in adulthood (MA/SAL). In the Probe Test, MA/SAL had decreased velocity and swam shorter distance than MA/MA or SAL/SAL rats suggesting increased floating of these animals. In the Memory Retention Test, SAL/MA rats swam shorter distance than SAL/SAL or MA/MA animals suggesting changes in used strategies in memory recall. As conclusion, our results suggest differences in the effect of combination of prenatal and adult exposure to MA. These effects further depend on the stage of CNS development and schedule of MA exposure affecting intrauterine development in male rats.
References provided by Crossref.org
The Impact of Neonatal Methamphetamine on Spatial Learning and Memory in Adult Female Rats
Influence of Prenatal Methamphetamine Abuse on the Brain
