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Impact of early life stress on alcohol consumption and on the short- and long-term responses to alcohol in adolescent female rats

We examined the interaction between early life stress and vulnerability to alcohol in female rats exposed to prenatal restraint stress (PRS rats). First we studied the impact of PRS on ethanol preference during adolescence. PRS slightly increased ethanol preference per se, but abolished the effect of social isolation on ethanol preference. We then studied the impact of PRS on short- and long-term responses to ethanol focusing on behavioral and neurochemical parameters related to depression/anxiety. PRS or unstressed adolescent female rats received 10% ethanol in the drinking water for 4 weeks from PND30 to PND60. At PND60, the immobility time in the forced-swim test did not differ between PRS and unstressed rats receiving water alone. Ethanol consumption had no effect in unstressed rats, but significantly reduced the immobility time in PRS rats. In contrast, a marked increase in the immobility time was seen after 5 weeks of ethanol withdrawal only in unstressed rats. Hippocampal levels of neuropeptide Y (NPY) and mGlu1a metabotropic glutamate receptors were increased at the end of ethanol treatment only in unstressed rats. Ethanol treatment had no effect on levels of corticotropin-releasing hormone (CRH) in the hippocampus, striatum, and prefrontal cortex of both groups of rats. After ethanol withdrawal, hippocampal levels of mGlu1 receptors were higher in unstressed rats, but lower in PRS rats, whereas NPY and CRH levels were similar in the two groups of rats. These data indicate that early life stress has a strong impact on the vulnerability and responsiveness to ethanol consumption during adolescence.
Male, EARLY LIFE STRESS, Alcohol Drinking, Corticotropin-Releasing Hormone, [SDV]Life Sciences [q-bio], 150, Prefrontal Cortex, NPY, Receptors, Metabotropic Glutamate, Choice Behavior, Hippocampus, MGLU1 RECEPTORS, STRESS DE CONTENTION, Rats, Sprague-Dawley, Pregnancy, Stress, Physiological, ETHANOL, Animals, Neuropeptide Y, Ethanol, immobility response; sprague-dawley; early life stress; neuropeptide y; pharmacology; adolescence; drug effects/physiology; npy; mglu1 receptors; psychology; physiology; prenatal exposure delayed effects; corpus striatum; rats; crh; social isolation; animals; corticotropin-releasing hormone; alcohol drinking; metabolism; male; physiopathology/psychology; stress; choice behavior; receptors; ethanol; female; physiological; metabotropic glutamate; pregnancy; hippocampus; prefrontal cortex; tonic; physiopathology, Immobility Response, Tonic, HIPPOCAMPE, Corpus Striatum, Rats, [SDV] Life Sciences [q-bio], Social Isolation, CRH, ADOLESCENCE, Prenatal Exposure Delayed Effects, RAT, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Female, RÉCEPTEUR GLUTAMATE MGLU1
Male, EARLY LIFE STRESS, Alcohol Drinking, Corticotropin-Releasing Hormone, [SDV]Life Sciences [q-bio], 150, Prefrontal Cortex, NPY, Receptors, Metabotropic Glutamate, Choice Behavior, Hippocampus, MGLU1 RECEPTORS, STRESS DE CONTENTION, Rats, Sprague-Dawley, Pregnancy, Stress, Physiological, ETHANOL, Animals, Neuropeptide Y, Ethanol, immobility response; sprague-dawley; early life stress; neuropeptide y; pharmacology; adolescence; drug effects/physiology; npy; mglu1 receptors; psychology; physiology; prenatal exposure delayed effects; corpus striatum; rats; crh; social isolation; animals; corticotropin-releasing hormone; alcohol drinking; metabolism; male; physiopathology/psychology; stress; choice behavior; receptors; ethanol; female; physiological; metabotropic glutamate; pregnancy; hippocampus; prefrontal cortex; tonic; physiopathology, Immobility Response, Tonic, HIPPOCAMPE, Corpus Striatum, Rats, [SDV] Life Sciences [q-bio], Social Isolation, CRH, ADOLESCENCE, Prenatal Exposure Delayed Effects, RAT, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Female, RÉCEPTEUR GLUTAMATE MGLU1
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