Neonatal dexamethasone treatment affects social behaviour of rats in later life
| Autor: | Patrick Joseph Gerardus Hendrikus Kamphuis, Frank van Bel, J.G.M. Bakker, Victor M. Wiegant, Gerda Croiset, Jan M. van Ree |
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| Rok vydání: | 2004 |
| Předmět: |
Male
endocrine system Elevated plus maze Time Factors Sexual Behavior Physiology Social behaviour Motor Activity Dexamethasone Developmental psychology Cellular and Molecular Neuroscience Memory Pregnancy Reaction Time polycyclic compounds medicine Animals Juvenile Rats Wistar Maze Learning Social Behavior Adverse effect Glucocorticoids Pharmacology Behavior Animal Social relation Rats Animals Newborn Exploratory Behavior Anxiety Female medicine.symptom Psychology Agonistic Behavior hormones hormone substitutes and hormone antagonists medicine.drug Hormone |
| Zdroj: | Neuropharmacology. 47:461-474 |
| ISSN: | 0028-3908 |
| DOI: | 10.1016/j.neuropharm.2004.04.008 |
| Popis: | Synthetic glucocorticoids, like dexamethasone (DEX), have been frequently administered to premature infants to prevent chronic lung disease. Major concern has arisen about the long-term neurodevelopmental sequelae of this DEX treatment. In the present study, we found that neonatal DEX treatment in rats, using a treatment protocol resembling the one used in the clinical situation, increased social play behaviour in juvenile life. Furthermore, neonatal DEX treatment increased sexual motivation and intromission behaviour in the bi-level chamber, decreased submissive behaviour during an aggressive encounter, and impaired social memory in adulthood. These changes in social behaviour are not due to a general behavioural impairment since anxiety behaviour in the elevated plus maze and exploratory activity in the open-field were not affected in DEX rats. In addition, DEX rats showed no alteration in the total duration of social interest or social activity during a social interaction test. These effects of neonatal DEX treatment on behaviour later in life likely result from neurodevelopmental actions of the hormone since we found no differences in received maternal care between DEX and SAL treated pups. Together these results indicate that neonatal treatment with DEX selectively alters aspects of the behavioural response to social challenges. Thus, neonatal DEX treatment may lead to inappropriate interactions with conspecifics later in life. These data therefore warrant investigation of lasting and potentially adverse effects of treatment of human neonates with DEX on social functioning. |
| Databáze: | OpenAIRE |
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