ArticleMolecular neurobiology2019
Neonatal Dexamethasone Treatment Suppresses Hippocampal Estrogen Receptor α Expression in Adolescent Female Rats.
Article in Molecular neurobiology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors at 4 institutions in 1 country.
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Abstract
Previous studies showed that neonatal dexamethasone treatment (NDT) transiently impaired hippocampal function in male rats. Hippocampal estrogen receptors (ERs) participate in avoidance learning. As previous studies focused on males only, this study was aimed to investigate the NDT effects on the hippocampal function of female rats. Newborn Wistar female rats were subjected to a tapering dose of dexamethasone (0.5 mg, 0.3 mg, and 0.1 mg/kg, subcutaneously) from postnatal days 1 to 3 and were subjected to experiments at the age of 6 weeks (adolescence). Brain slice extracellular recording and the inhibitory avoidance (IA) test were used to evaluate the NDT effects on hippocampal function. The results showed that NDT completely blocked the hippocampal long-term potentiation (LTP) formation and IA learning of adolescents. The expression of hippocampal estrogen receptor alpha (ERα) was attenuated in NDT subjects. Reduced histone acetylation of the ERα gene was found, possibly explaining the reduced hippocampal ERα expression in NDT female rats. Suprafusion of estradiol (E
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