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Insomnia and AUD are individually associated with increases in systemic inflammation. Insomnia and inflammation both serve as risk factors for relapse in AUD. However, little is known about the relationship between insomnia and systemic inflammation in individuals with AUD. Therefore, the present study examined the relationship between the severity of insomnia symptoms and plasma levels of inflammatory cytokines in a sample of treatment\u2010seeking individuals with an AUD.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This secondary analysis included 101 (61M\/40F) individuals with an AUD. Participants were categorized into groups based on their scores on the Insomnia Severity Index: no insomnia (<jats:italic>n<\/jats:italic>\u2009=\u200947), subthreshold insomnia (<jats:italic>n<\/jats:italic>\u2009=\u200937), and clinical insomnia (<jats:italic>n<\/jats:italic>\u2009=\u200917). Participants provided blood samples to measure plasma levels of four peripheral markers of inflammation (IL\u20106, IL\u20108, TNF\u2010\u03b1, and CRP). Inflammatory marker levels were compared between groups. Interactive effects of sex and AUD severity were examined.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>There was a significant main effect of insomnia group on log IL\u20108 levels (<jats:italic>F<\/jats:italic>\u2009=\u20096.52, <jats:italic>p<\/jats:italic>\u2009=\u20090.002), such that individuals with AUD and clinical insomnia had higher log IL\u20108 levels compared to both the no insomnia and subthreshold insomnia groups (<jats:italic>p<\/jats:italic>s\u2009\u2264\u20090.05). Sex and AUD severity interacted with this relationship, such that men with clinical insomnia and AUD and individuals with severe AUD had higher log IL\u20108 levels. There were no significant effects of insomnia on IL\u20106, TNF\u2010\u03b1, or CRP levels.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The present study identified a specific elevation in IL\u20108 levels in individuals with an AUD and clinical insomnia that was not identified in other markers of peripheral inflammation (IL\u20106, TNF\u2010\u03b1, CRP). Sex and AUD severity interacted with insomnia symptoms, indicating that those with clinical insomnia and severe AUD or male sex may be the most vulnerable to the inflammatory consequences associated with AUD and clinical insomnia symptoms.<\/jats:p><\/jats:sec>","DOI":"10.1111\/acer.15444","type":"journal-article","created":{"date-parts":[[2024,10,14]],"date-time":"2024-10-14T01:39:01Z","timestamp":1728869941000},"page":"2079-2088","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Elevations in interleukin\u20108 levels in individuals with alcohol use disorder and clinical insomnia symptoms"],"prefix":"10.1111","volume":"48","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5528-4918","authenticated-orcid":false,"given":"Erica N.","family":"Grodin","sequence":"first","affiliation":[{"name":"Department of Psychiatry and Biobehavioral Sciences University of California at Los Angeles  Los Angeles California 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