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Insomnia-Related Metabolomic Profiles Reflect Antioxidant Deficits and Relate to Cognitive Decline Through a
Cynthia Kusters1, Jose Santos Cabrera2,3,4, Yu Zhang5
1Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, CA, USA.
Medrxiv : the Preprint Server for Health Sciences
|February 12, 2026
Summary
This study identified specific metabolites linked to insomnia symptoms in U.S. Hispanic/Latino adults. These metabolic changes may also contribute to a higher risk of mild cognitive impairment (MCI) over time.
Area of Science:
- Metabolomics
- Sleep Science
- Neuroscience
Background:
- Insomnia prevalence is high, particularly in Hispanic populations, and is linked to cognitive decline.
- Previous metabolomic studies on sleep disorders have limitations, especially concerning insomnia in Hispanic adults.
- This study addresses gaps by investigating metabolites and cognitive decline in the Hispanic Community Health Study/Study of Latinos (HCHS/SOL) cohort.
Purpose of the Study:
- To identify specific serum metabolites associated with insomnia symptoms in U.S. Hispanic/Latino adults.
- To develop and validate metabolite risk scores (MRS) for insomnia symptoms.
- To explore the relationship between identified metabolites, MRS, and cross-phenotypes including cognitive function.
Main Methods:
- Analysis of data from 6,107 participants in the HCHS/SOL study, divided into discovery and replication datasets.
- Examination of 768 serum metabolites and insomnia symptoms using LASSO regression for metabolite risk score (MRS) generation.
- Replication of metabolite associations and evaluation of MRS with sleep, cognitive, and psychological traits.
Main Results:
- Nine metabolites were associated with insomnia symptoms in the discovery phase, with two (hydrocinnamate and indolepropionate) replicated.
- Lower levels of hydrocinnamate and indolepropionate correlated with increased insomnia symptoms.
- The validated WHIIRS MRS was associated with a higher risk of developing mild cognitive impairment (MCI) seven years later (OR: 1.58).
Conclusions:
- The metabolomic profile of insomnia includes diet and gut microbiome metabolites, suggesting shared mechanisms with comorbidities.
- Specific metabolites linked to insomnia may also be associated with an increased risk of cognitive decline.
- Metabolite risk scores show potential for predicting long-term health risks, highlighting the role of metabolomics in sleep and cognitive health research.
Keywords:
Hispanic/Latino adults in the United StatesUntargeted metabolomicsdiscovery and replicationinsomniaMore Related Videos
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