Biomarkers of Insufficient Sleep and Sleepiness

Study Overview
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Brief Summary
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Sleep and wakefulness disorders impact 50 to 70 million Americans and insufficient sleep is epidemic with over 50% of Americans reporting less than 7 hours of sleep per night. Health problems associated with insufficient sleep include inflammation, depression and anxiety, diabetes, stress, drug abuse, poor quality of life, obesity, and fatigue related accidents on the job/while driving. While the contribution of sleep to overall health, well-being, and public safety is recognized, no established clinical biomarkers of sleep deficiency exist. Such biomarkers would have utility as road-side biomarkers of sleepiness (e.g., drowsy driving), monitoring on the job fatigue/fitness for duty (e.g., transportation, military ops health care), monitoring sleep health, as well as for clinical diagnostics and measures of clinical treatment outcomes. Thus, investigators designed a controlled laboratory insufficient sleep protocol utilizing metabolomics to identify biomarkers of insufficient sleep. Investigators propose to identify changes in metabolites that consistently occur during insufficient sleep. As an exploratory outcome investigators will examine associated changes in metabolites and cognitive performance during insufficient sleep.

Detailed Description
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Impaired sleep affects millions of people each year representing an important public health issue. This project will utilize metabolomics approaches to identify biomarkers in the blood that respond consistently to insufficient sleep. The overall goal of this project is to use a discovery and targeted approach to identify specific small molecules in plasma as candidate biomarkers of insufficient sleep. Investigators will conduct a controlled in-laboratory insufficient sleep protocol where participants receive 2 days of 5 hour sleep opportunities per night on 2 separate occasions. Plasma will be collected for metabolomics analyses every 2 hours (across 24 hours) during scheduled wakefulness at baseline and during insufficient sleep. Participants will complete the insufficient sleep protocol twice, separated by 23 days of sufficient sleep, to identify which plasma metabolites consistently change during insufficient sleep. Investigators anticipate these findings will be the first step in establishing validated biomarkers of impaired sleep that will advance our understanding, assessment and management of health consequences and symptoms associated with insufficient sleep.

Official Title
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Biomarkers of Insufficient Sleep and Sleepiness

Conditions
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Sleep Deprivation, Insufficient Sleep Syndrome, Sleep Wake Disorders

Intervention / Treatment
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* Behavioral: Insufficient Sleep


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: normal Body mass index (18.5-24.9) normal blood chemistries habitual sleep duration  7 - 9.25 hours live at Denver altitude or higher for at least 3 months Exclusion Criteria: must not be participating in another research study that could influence safe participation in the current study any clinically significant medical or surgical condition within last year clinically significant abnormality during physical examination any physician determined significant abnormality in vital signs, EKG, or clinical laboratory values any clinically significant psychiatric condition defined by DSM-V any clinically significant sleep disorder use of medications/supplements/drugs within one month of study or need of medications during study symptoms of active illness uncorrected visual impairment working shift-work in year prior to study travel more than 1 time zone in 3 weeks prior to study pregnant/nursing greater than moderate caffeine or alcohol use positive toxicology screening current smoker

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 35 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Non-Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: Baseline<br>9 hour sleep opportunity at habitual sleep/wake times for 14 days at home and 1 day in lab repeated for visit 1 and visit 2 | |
| Experimental: Insufficient Sleep<br>2 days with 5 hour sleep opportunities immediately following baseline on both visit 1 and visit 2. | Behavioral: Insufficient Sleep<br>* 2 days with 5 hour sleep opportunity per day<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Plasma Metabolomics Biomarker Fingerprint | Investigators can detect  4,000 plasma metabolites and will identify which metabolites have consistent, sensitive, and specific responses to insufficient sleep across visits one and two. These metabolites will be identified as candidate biomarkers of insufficient sleep. | Plasma will be collected for metabolomics analyses every 2 hours during scheduled wakefulness at baseline and during the final 24 hours of insufficient sleep for both visits one and two | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Psychomotor Vigilance Test | The Psychomotor Vigilance Test is a reaction time based test designed to evaluate the ability to sustain attention. | Participants will complete the psychomotor vigilance test every 3 hours during scheduled wakefulness across baseline and insufficient sleep for visits one and two |