Single alcohol exposure in early life damages hippocampal stem/progenitor cells and reduces adult neurogenesis.
Alcohol exposure during pregnancy may cause fetal alcohol syndrome (FAS), characterized by impaired cognitive functions. Neurogenesis occurs in the adult hippocampus and is functionally associated with learning, memory, and mood disorders. However, whether early postnatal exposure to alcohol impairs neurogenesis and through which mechanisms it occurs is poorly understood. Here, we report that a single episode of alcohol exposure in postnatal day 7 (P7) decreases neurogenesis in the adult hippocampus. Furthermore, we demonstrate a co-localization of glial fibrillar acidic protein, nestin, and vimentin with activated caspase-3 12 h after ethanol treatment. Finally, we show that the number of primary neurospheres derived from the hippocampi of alcohol-exposed mice is reduced compared to controls. These findings suggest that alcohol exposure in postnatal mice reduces the pool of neural stem/progenitor cells in the DG, and subsequently results in a decrease of adult neurogenesis. This may explain certain aspects of impaired hippocampal functions in FAS.
Ieraci
Alessandro
A
Department of Psychiatry, Weill Medical College of Cornell University, 1300 York Avenue, Box 244, New York, NY 10021, USA.
Herrera
Daniel G
DG
D000375:Aging / Q000187:drug effects / Q000502:physiology; D020268:Alcohol-Induced Disorders, Nervous System / Q000473:pathology / Q000503:physiopathology*; D000818:Animals; D000831:Animals, Newborn; D053148:Caspase 3 / Q000187:drug effects / Q000378:metabolism; D002454:Cell Differentiation / Q000187:drug effects* / Q000502:physiology; D002478:Cells, Cultured; D002492:Central Nervous System Depressants / Q000633:toxicity; D004334:Drug Administration Schedule; D000431:Ethanol / Q000633:toxicity*; D005904:Glial Fibrillary Acidic Protein / Q000187:drug effects / Q000378:metabolism; D006624:Hippocampus / Q000187:drug effects* / Q000254:growth & development / Q000503:physiopathology; D007381:Intermediate Filament Proteins / Q000187:drug effects / Q000378:metabolism; D008569:Memory Disorders / Q000139:chemically induced / Q000473:pathology / Q000503:physiopathology; D051379:Mice; D009419:Nerve Tissue Proteins / Q000187:drug effects / Q000378:metabolism; D064231:Nestin; D009474:Neurons / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D018874:Spheroids, Cellular / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D013234:Stem Cells / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D013995:Time; D014746:Vimentin / Q000187:drug effects / Q000378:metabolism
D002492:Central Nervous System Depressants; D005904:Glial Fibrillary Acidic Protein; D007381:Intermediate Filament Proteins; D009419:Nerve Tissue Proteins; C577485:Nes protein, mouse; D064231:Nestin; D014746:Vimentin; D000431:Ethanol; D053148:Caspase 3