Sleep Restriction Clinical Trial
Official title:
Sleep Restriction, Impaired Glucose Metabolism, and Performance: The Effects of Modafinil to Counteract the Adverse Metabolic Consequences of Sleep Restriction
Verified date | May 2009 |
Source | Brigham and Women's Hospital |
Contact | n/a |
Is FDA regulated | No |
Health authority | United States: Institutional Review Board |
Study type | Interventional |
The purpose of the study is to examine the effects of sleep and modafinil on how the body processes glucose.
Status | Completed |
Enrollment | 20 |
Est. completion date | April 2007 |
Est. primary completion date | April 2007 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Male |
Age group | 20 Years to 35 Years |
Eligibility |
Inclusion Criteria: - Subjects must have also demonstrated a full understanding of the requirements and demands of the study. - Individuals must have been willing to follow a regular sleep-wake schedule. Exclusion Criteria: - Sleep/wake history. During completion of the preliminary telephone and written screening questionnaires, potential volunteers were asked a number of questions about their present, past and desired habitual sleep/wake schedule, including their habitual and desired bedtimes, wake-times, and nap times. Those potential volunteers with a history of night-work in the preceding 3-year period or travel across >2 time zones in the 3 months prior to the study were excluded. - Individuals who are unable or unwilling to follow a regular sleep-wake schedule were excluded from the study. - Drug/Alcohol Use. Volunteers must have been drug-free (including nicotine) and with moderate or no use of caffeine or alcohol for the entire duration of the study. No medications (prescription or over the counter) that significantly affect circadian rhythms, endocrine physiology, or sleep were allowed. They must have had no history of drug or alcohol dependency. No caffeine or alcohol were allowed for one week prior to or during the inpatient portion of the protocol. A comprehensive toxicological analysis of blood and urine for prescription medication, non-prescription medication, drugs of abuse, and caffeine, nicotine and alcohol metabolites was carried out for verification of reported non-use during the initial screening and on the day of admission to the laboratory for verification. - Evaluation of Medical Suitability. Only healthy, non-obese men were selected for this study. Subjects must have been free from any acute, chronic or debilitating medical conditions. Normality was established on the basis of clinical history, electrocardiogram, clinical biochemical screening tests of blood and urine, and a physical examination conducted by a licensed physician. Any subject with symptoms of active illness (e.g., fever, leukocytosis, hypertension) was excluded from study. Given the wide range of illnesses that are encountered in medical practice, it would not be possible to provide a comprehensive list of each and every disease that could serve as grounds for exclusion for the subject. However, the following is a list of illnesses that would certainly have been grounds for exclusion: Chronobiologic Disorders, Sleep Disorders, Diseases of the Cardiovascular System, Disorders of the Kidney and Urinary Tract, Infectious Diseases, Disorders of the Gastrointestinal System, Disorders of the Immune System, Connective Tissue and Joints, Disorders of the Hematopoietic System, Neoplastic Diseases, Endocrine and Metabolic Diseases, Neurologic Disorders; significant impairments of the visual system. - Evaluation of Psychiatric/Psychological Suitability. Each potential volunteer completed a series of psychological questionnaires received a comprehensive psychological examination by a clinical psychologist experienced with the psychological screening for the subjects in our studies. Individuals with evidence of psychopathology on standardized questionnaires or in a structured interview were excluded from study. Individuals with a history of psychiatric illnesses or psychiatric disorders were excluded. Individuals who are unaware of specific psychiatric diagnoses who have a history of having been treated with antidepressant, neuroleptic medications or major tranquilizers were excluded from study. However, a personal history of limited prior counseling or psychotherapy (e.g., for adjustment reactions) was not necessarily exclusionary. Potential subjects were evaluated for Axis II personality types that might interfere with protocol compliance or with their personal ability to tolerate the conditions of the study, such as temporal isolation and confinement. |
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment
Country | Name | City | State |
---|---|---|---|
United States | Brigham & Women's Hospital | Boston | Massachusetts |
Lead Sponsor | Collaborator |
---|---|
Brigham and Women's Hospital |
United States,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Insulin sensitivity measured with euglycemic hyperinsulinemic clamp | Following 3 nights of a continued 'sleep replete' period with 10 hours/night of time in bed and again following 7 days sleep restricted to 5 hrs time in bed/night | No | |
Secondary | Insulin release (i.e., pancreatic beta cell function) measured on IVGTT | Following 3 nights of a continued 'sleep replete' period with 10 hours/night of time in bed and again following 7 days sleep restricted to 5 hrs time in bed/night | No | |
Secondary | Glucose effectiveness measured using an IVGTT, clamp | Following 3 nights of a continued 'sleep replete' period with 10 hours/night of time in bed and again following 7 days sleep restricted to 5 hrs time in bed/night | No | |
Secondary | Biomarkers of Sleep Loss (HbA1c, fructosamine, insulin, glucose, cortisol thyrotropic axis function, lipid metabolism, leptin, ghrelin and cytokine signaling) | Following 3 nights of a continued 'sleep replete' period with 10 hours/night of time in bed and again following 7 days sleep restricted to 5 hrs time in bed/night | No | |
Secondary | Subjective measures of sleepiness and alertness | Every 3 hours while awake during the 12-day inpatient stay | No | |
Secondary | RMR assessed by indirect calorimetry | On the morning and late afternoon of day 4 and 11 | No | |
Secondary | Urinary catecholamines levels | Over 24 hours on days 3, 4, 10, 11 | No | |
Secondary | Salivary free cortisol | Every 30 minutes in the afternoon of days 3, 4, 10, 11 | No | |
Secondary | Neurobehavioral performance | approx very 3 hours during wake in the 12-day inpatient stay | No |
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