Effect of 10-day Overnight Hypoxia Treatment on Whole Body Insulin Sensitivity (SLEEP HIGH Study) (SLEEP HIGH)

December 1, 2015 updated by: Eric Ravussin, Pennington Biomedical Research Center
The purpose of this study is to look at how a reduction in oxygen levels (hypoxia) influences insulin sensitivity and carbohydrate metabolism. It is expected that 10 nights of exposure to moderate hypoxia (~ 15% O2, similar to conditions at an altitude of ~7500 feet) will improve glucose metabolism.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

9

Phase

  • Early Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • Louisiana
      • Baton Rouge, Louisiana, United States, 70808
        • Pennington Biomedical Research Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

20 years to 45 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Male

Description

Inclusion Criteria:

  • Aged 20-45 years
  • Male
  • Obese category (BMI > 30 kg/m2)
  • Healthy as assessed by a self-reported health questionnaire
  • Non-smokers
  • Weight stable over the past 3 months (<2kg fluctuation)

Exclusion Criteria:

  • Female
  • Diabetes
  • Sleep apnea
  • Hypertension
  • History of altitude sickness
  • Individuals taking any chronic medications
  • Individuals taking any stimulants
  • Individuals taking beta-blockers
  • Individuals with chronic alcohol consumption (>3 drinks per day) or drug abuse.
  • Individuals unable to abstain from caffeinated beverage or alcohol the days of study testing
  • Individuals with history disease or history of stroke

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Hypoxia Exposure
There was only one study arm: All participants slept in moderate hypoxia (see description below).
Participants spent 10 consecutive nights (approximately 100 hours of exposure) in a hypoxic tent at ~ 15% O2 (ca. 2400 m elevation).

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Insulin sensitivity
Time Frame: Change from baseline to 10 nights of hypoxia exposure
Glucose disposal and oxidation were measured using a two-step hyperinsulinemic euglycemic clamp and indirect calorimetry.
Change from baseline to 10 nights of hypoxia exposure

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in oxygen tension in adipose tissue
Time Frame: Before and after 10 nights of hypoxia exposure
pO2 levels were measured in adipose tissue both under hypoxia and normal oxygen conditions (normoxia) via a dual temperature-oxygen tension probe.
Before and after 10 nights of hypoxia exposure
Glucose uptake in myotubes
Time Frame: Before 10 nights of hypoxia exposure
Glucose uptake assays were performed in the presence or absence of hypoxia on myotubes harvested from muscle biopsies.
Before 10 nights of hypoxia exposure
Change in gene and protein expression
Time Frame: Before and after 10 nights of hypoxia exposure
Gene and protein expression of some hypoxia-responsive and insulin-signaling markers were measured in biopsied muscle and adipose tissue via RT-PCR and Western blotting, respectively.
Before and after 10 nights of hypoxia exposure

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

July 1, 2011

Primary Completion (Actual)

September 1, 2012

Study Completion (Actual)

May 1, 2013

Study Registration Dates

First Submitted

June 3, 2013

First Submitted That Met QC Criteria

June 5, 2013

First Posted (Estimate)

June 7, 2013

Study Record Updates

Last Update Posted (Estimate)

December 2, 2015

Last Update Submitted That Met QC Criteria

December 1, 2015

Last Verified

December 1, 2015

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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