Effects of Sleep Duration and Architecture on Insulin Sensitivity
| Status: | Completed |
|---|---|
| Conditions: | Endocrine |
| Therapuetic Areas: | Endocrinology |
| Healthy: | No |
| Age Range: | 18 - 45 |
| Updated: | 4/2/2016 |
| Start Date: | May 2011 |
| End Date: | December 2014 |
This pilot clinical trial will test the hypotheses that sleep restriction (for 5 nights), in
comparison to "normal sleep", will:
1. Decrease peripheral insulin sensitivity and glucose tolerance, as measured by the
hyperinsulinemic-euglycemic clamp and oral glucose tolerance test.
2. Decrease hepatic insulin sensitivity, as assessed by stable isotope studies of
endogenous glucose production, gluconeogenesis and glycogenolysis.
comparison to "normal sleep", will:
1. Decrease peripheral insulin sensitivity and glucose tolerance, as measured by the
hyperinsulinemic-euglycemic clamp and oral glucose tolerance test.
2. Decrease hepatic insulin sensitivity, as assessed by stable isotope studies of
endogenous glucose production, gluconeogenesis and glycogenolysis.
Over the past 50 years, the incidence of diabetes has increased dramatically, while sleep
duration in the US has decreased significantly. Epidemiological studies and small clinical
trials suggest that these trends are causally related. In this study, our goal is to
determine the mechanisms by which decreased sleep duration directly affects insulin
sensitivity. The investigators will perform a clinical study in 20 healthy volunteers to
determine whether 5 nights of sleep restriction decreases insulin sensitivity in the
peripheral tissues (ie, skeletal muscle) or liver.
Peripheral insulin sensitivity will be measured by the hyperinsulinemic-euglycemic clamp,
and hepatic insulin sensitivity will be quantified by measurement of hepatic glucose
production, gluconeogenesis and glycogenolysis (using stable isotope tracer methods).
Subjects will be randomized to an initial period of "normal sleep" or sleep restriction and
will be admitted to the Clinical Research Center (CRC) for 9 days to undergo comprehensive
metabolic studies and sleep assessments under the assigned sleep condition. After a 1-month
washout period, subjects will be re-admitted to the CRC to undergo these same assessments
under the opposite sleep condition.
duration in the US has decreased significantly. Epidemiological studies and small clinical
trials suggest that these trends are causally related. In this study, our goal is to
determine the mechanisms by which decreased sleep duration directly affects insulin
sensitivity. The investigators will perform a clinical study in 20 healthy volunteers to
determine whether 5 nights of sleep restriction decreases insulin sensitivity in the
peripheral tissues (ie, skeletal muscle) or liver.
Peripheral insulin sensitivity will be measured by the hyperinsulinemic-euglycemic clamp,
and hepatic insulin sensitivity will be quantified by measurement of hepatic glucose
production, gluconeogenesis and glycogenolysis (using stable isotope tracer methods).
Subjects will be randomized to an initial period of "normal sleep" or sleep restriction and
will be admitted to the Clinical Research Center (CRC) for 9 days to undergo comprehensive
metabolic studies and sleep assessments under the assigned sleep condition. After a 1-month
washout period, subjects will be re-admitted to the CRC to undergo these same assessments
under the opposite sleep condition.
Inclusion Criteria:
- Age 18-45 years
- Regular work hours (ie, no night-time or shift work within the past 6 months)
- Pittsburgh Sleep Quality Index (PSQI) Score <5
- Average nightly sleep duration 6-9 hours (per screening actigraphy)
Exclusion Criteria:
- Current or prior diabetes, gestational diabetes, impaired glucose tolerance or
impaired fasting glucose
- Type 2 diabetes in biological parents
- BMI >=25
- Pregnancy
- Chronic medical condition, including: psychiatric disorders, heart disease, pulmonary
disease, infectious diseases, rheumatological and neurological disorders
- Use of prescribed medications on a regular basis.
- History of disorder involving hypothalamic, pituitary or adrenal glands
- History of or current sleep disorders (insomnia, restless leg syndrome, sleep
disordered breathing, narcolepsy, etc)
- Anemia
- Cognitive impairment
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