Behavioral deficits induced by third-trimester equivalent alcohol exposure in male C57BL/6J mice are not associated with reduced adult hippocampal neurogenesis but are still rescued with voluntary exercise
| Autor: | Justin S. Rhodes, G.F. Hamilton, Daniel S. Miller, P.J. Bucko, Ross DeAngelis, C.P. Krebs |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Male
0301 basic medicine medicine.medical_specialty Doublecortin Protein Cell Survival Neurogenesis medicine.medical_treatment Hippocampus Motor Activity Hippocampal formation Article 03 medical and health sciences Behavioral Neuroscience chemistry.chemical_compound 0302 clinical medicine Physical Conditioning Animal Internal medicine medicine Animals Saline Neurons Ethanol Behavior Animal biology Doublecortin Mice Inbred C57BL 030104 developmental biology Endocrinology chemistry Turnover biology.protein Psychology Neuroscience 030217 neurology & neurosurgery Bromodeoxyuridine |
| Zdroj: | Behavioural Brain Research. 314:96-105 |
| ISSN: | 0166-4328 |
| Popis: | Prenatal alcohol exposure can produce permanent alterations in brain structure and profound behavioral deficits. Mouse models can help discover mechanisms and identify potentially useful interventions. This study examined long-term influences of either a single or repeated alcohol exposure during the third-trimester equivalent on survival of new neurons in the hippocampus, behavioral performance on the Passive avoidance and Rotarod tasks, and the potential role of exercise as a therapeutic intervention. C57BL/6J male mice received either saline or 5 g/kg ethanol split into two s.c. injections, two hours apart, on postnatal day (PD)7 (Experiment 1) or on PD5, 7 and 9 (Experiment 2). All mice were weaned on PD21 and received either a running wheel or remained sedentary from PD35-PD80/81. From PD36-45, mice received i.p. injections of 50 mg/kg bromodeoxyuridine (BrdU) to label dividing cells. Behavioral testing occurred between PD72-79. Number of surviving BrdU+ cells and immature neurons (doublecortin; DCX + ) was measured at PD80-81. Alcohol did not affect number of BrdU+ or DCX+ cells in either experiment. Running significantly increased number of BrdU+ and DCX+ cells in both treatment groups. Alcohol-induced deficits on Rotarod performance and acquisition of the Passive avoidance task (Day 1) were evident only in Experiment 2 and running rescued these deficits. These data suggest neonatal alcohol exposure does not result in long-term impairments in adult hippocampal neurogenesis in the mouse model. Three doses of ethanol were necessary to induce behavioral deficits. Finally, the mechanisms by which exercise ameliorated the neonatal alcohol induced behavioral deficits remain unknown. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect