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Molecular Signatures of Social Stress-Induced Escalation of Drinking

社会压力引起饮酒增加的分子特征

基本信息

批准号：
10667840
负责人：
Rajani Maiya
金额：
$ 23.81万
依托单位：
LSU HEALTH SCIENCES CENTER
依托单位国家：
美国
项目类别：
财政年份：
2023
资助国家：
美国
起止时间：
2023-05-20 至 2025-04-30
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/10667840
关键词：
Addictive Behavior Alcohol consumption Alcohols Animals Anxiety Arousal Behavioral Brain region Candidate Disease Gene Cell Nucleus Cells Code Databases Dimensions Disease Drug Addiction Drug usage Enterobacteria phage P1 Cre recombinase Estrogen Receptors Exposure to FOS gene Female Future Gene Expression Profile Genes Genetic Genetic Recombination Genetic Transcription Grant Human Human Development Hypothalamic structure In Situ Hybridization Individual Knowledge Label Lead Libraries Maps Mediating Mental Depression Mental disorders Messenger RNA Modeling Molecular Molecular Profiling Motivation Mus Neurons Neurosecretory Systems Pathway Analysis Pathway interactions Population Process RNA Reporter Resolution Reverse Transcription Rewards Risk Factors Rodent Role Signal Transduction Social Environment Social Interaction Source Stress Stressful Event Structure of paraventricular nucleus of thalamus System Testing Thalamic structure Tissue-Specific Gene Expression addiction alcohol exposure alcohol use disorder behavioral response candidate identification cell type differential expression drinking drug candidate drug of abuse druggable target experience experimental study gene network high reward high risk inducible Cre male motivated behavior mouse model neural neural circuit neuroadaptation neuromechanism neuropsychiatry paraventricular nucleus preference prevent programs promoter response social social defeat social stress social stressor stressor transcriptome transcriptomic profiling

项目摘要

Social stress is one of the most common forms of stress experienced by humans and has been well documented to contribute to a wide variety of neuropsychiatric conditions. Exposure to repeated social defeat stress (SDS) in rodents enhances the rewarding and reinforcing effects of several drugs of abuse, including alcohol, and is a reliable predictor of future drug use. SDS is effectively modeled in animals through social defeat paradigms, where an antagonistic encounter is initiated between two animals of the same species. There is substantial overlap between brain regions that mediate the behavioral response to stressors and those that mediate drug addiction, implying shared neural circuitry. However, the precise neural mechanisms by which social stressors increase alcohol consumption are not well understood. This application will address this gap in knowledge by using a cell type agnostic approach to identify and profile the transcriptomes of cells that are activated by both SDS and alcohol exposure at single cell resolution. Using the recently developed TRAP2 (Targeted Recombination in Activated Populations) system and a mouse model for SDS-induced escalation of alcohol drinking, we examined the overlap between neural ensembles that are activated by social stress and alcohol consumption in the same animal. Our preliminary results indicate that SDS increased alcohol consumption and neuronal activation in the paraventricular thalamus (PVT) and the paraventricular nucleus of the hypothalamus (PVN), brain regions known to mediate the motivational effects of stress. We found that both stress and alcohol by themselves activate a large number of cells in the PVT and PVN. Interestingly, our results also indicate that >80% of stress-activated cells are also activated by alcohol in these brain regions. Based on these results, we hypothesize that transcriptional programs in cells that are activated by both stress and alcohol in the PVT and PVN are unique compared to those that are activated by stress alone or alcohol alone and underlie stress- induced escalation of alcohol consumption. We propose to use single nuclei sequencing to transcriptionally profile cells in the PVT and PVN that are activated by both stress and alcohol. We will then identify genes, pathways and processes that are dysregulated in these cells. We also propose to us the Library of Integrated Cellular Signatures (LINCs) to identify compounds that will reverse these transcriptional signatures and are thus predicted to prevent stress-induced escalation of alcohol consumption.

社会压力是人类经历过的最常见的压力形式之一，并且有很好的记录