Low Dose Growth Hormone in Obese PCOS Women
Growth hormone (GH), through its generation of free 'bioavailable' insulin-like growth factor (IGF)-I, can improve insulin sensitivity and the metabolic profile of women with polycystic ovary syndrome.
To determine the mechanism of how low dose GH treatment affects the body's sensitivity to insulin actions and whether this low GH dose can affect the body's handling of steroid hormone levels (cortisol clearance) and testosterone (male hormones) in obese women with polycystic ovary syndrome.
Obese women with polycystic ovary syndrome, but not recently been on GH treatment, and presently attending Outpatients Clinic will be invited to participate in this study. The subjects will be assessed at the initial visit to ascertain their suitability before further participating in the study. If suitable, an equal number of women will be randomized to receive either daily low dose GH or placebo injections first for 12 weeks, before exchanging over for another 12 weeks of treatment after a 4-week washout period. Before, during and after treatment, the subjects will be assessed at frequently with blood tests, scans and fat biopsies. During the study, the subjects will be studied 4 times at the Oregon Clinical and Translational Research Institute (OCTRI). At the first, second and final visit, testing will include scans to measure the amount of whole body fat and fat in the stomach area, muscle, and liver; blood tests to measure levels of cortisol, and fat tissue (taken from a biopsy) analysis to measure the density of insulin-like growth factor-I (a hormone stimulated by growth hormone in the body) in fat; whereas blood tests to examine how well insulin works in the body (insulin sensitivity) will be collected at all visits of the study.
|Study Design:||Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||Effects of Low Dose Growth Hormone (GH) Therapy on Insulin Sensitivity, Metabolic Profile, Adipocyte IGF-I and Insulin Signaling, Intramyocellular Lipids, and Cortisol Metabolism in Obese Women With Polycystic Ovary Syndrome (PCOS)|
- Changes in insulin sensitivity, and adipocyte IGF-I and insulin receptor signaling. [ Time Frame: 24 months ]
- Changes in body composition, cortisol production rates, and muscle and liver intramyocellular content. [ Time Frame: 24 months ]
|Study Start Date:||October 2010|
|Estimated Study Completion Date:||October 2011|
|Estimated Primary Completion Date:||October 2011 (Final data collection date for primary outcome measure)|
Growth hormone or Placebo 0.1 mg/day self-administrated once a day.
Nutropin 0.1 mg/day self-administered once a day
Other Name: Growth hormone, PCOS, insulin sensitivity
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00518635
|United States, Oregon|
|Oregon Health and Science University|
|Portland, Oregon, United States, 97239|
|Principal Investigator:||Kevin C. Yuen, MRCP(UK), MD||Oregon Health and Science University|
|Principal Investigator:||David M. Cook, MD||Oregon Health and Science University|