ArticlePsychopharmacology2025
Exploring the effects of adolescent social isolation stress on the serotonin system and ethanol-motivated behaviors.
Article in Psychopharmacology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Behavioral impact of chemogenetic manipulations of 5-HT DRN neurons in transgenic Tph2-iCre rats.Psychopharmacology · 2026Article
- Impact of adolescent social Isolation on increased risk for alcohol intake and aversion-resistant drinking in males and females.Research square · 2026Article
- Involvement of the dorsal raphe serotonin system in basal and punished heroin self-administration and stress-induced reinstatement in male and female rats.Psychopharmacology · 2026Article
- Effects of social isolation on locus coeruleus opioid receptor expression and affective behavior.Neurobiology of stress · 2025Article
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Authors and funding
5 authors.
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Abstract
rationaleAlcohol is one of the most frequently used drugs of abuse and has a major impact on human health worldwide. People assigned female at birth and those with adverse childhood experiences are stress-vulnerable and more likely to report drinking as a means of "self-medication." Prior studies in our laboratory showed that adolescent social isolation stress (SIS) increases vulnerability to ethanol (EtOH) intake and consumption despite negative consequences in female rats.
objectivesHere, we explored modulation of the dorsal raphe nucleus (DRN)-serotonin (5-HT) system, a sexually dimorphic neurotransmitter system involved in stress-reward interactions, to determine its contribution to EtOH-motivated behaviors in rats that have undergone SIS.
resultsWe employed electrophysiological and functional neuroanatomy strategies to show that both SIS and EtOH exposure induce persistent hypofunction of the DRN 5-HT system, particularly in females. Chemogenetic activation of DRN 5-HT neurons attenuated reward value for both EtOH and sucrose and elevated punished responding for EtOH in a stress-dependent manner.
conclusionsOur results highlight an inverse relationship between EtOH consumption and the 5-HT system, the sex- and stress-dependent nature of this relationship, and a connection between DRN 5-HT signaling and acute responding to rewards and punishment. These data support the DRN 5-HT system as a potential target to treat aberrant alcohol consumption and drinking despite negative consequences in stress-vulnerable populations.
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