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The Hypothalamic-Pituitary-Adrenal (HPA) Axis as an Effector System in Weight Regulation

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ClinicalTrials.gov Identifier: NCT00688987
Recruitment Status : Completed
First Posted : June 3, 2008
Last Update Posted : June 5, 2008
Information provided by:
Oregon Health and Science University

Brief Summary:
Replacing glucocorticoid in a dose dependent manner (including doses within the physiological range) to subjects with adrenal insufficiency will increase visceral fat accumulation independently of total fat mass.

Condition or disease Intervention/treatment Phase
Obesity Addison's Disease Drug: Hydrocortisone Dietary Supplement: Isocaloric Diet Not Applicable

Detailed Description:
To measure total fat mass by DEXA scan, central (visceral) fat accumulation, insulin sensitivity by FSIVGTT, lipid levels, and adipocyte gene expression in subjects with AI receiving increasing doses of hydrocortisone replacement (15 mg, 25 mg, and 40 mg per day in split doses) for 4-months at a time during ad-lib feeding.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 24 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Investigator)
Primary Purpose: Treatment
Official Title: Cortisol, Central Obesity, and Insulin Resistance: Long Term Studies in Addison's Patients
Study Start Date : August 2000
Actual Primary Completion Date : July 2004
Actual Study Completion Date : August 2004

Arm Intervention/treatment
Active Comparator: 1
Subjects with AI will be randomized to each of three doses of hydrocortisone for 4 months on each dose.
Drug: Hydrocortisone
Subjects will receive in random order daily (split) dosing of hydrocortisone: a low dose of 15 mg (10 in AM, 5 in PM); a medium dose of 25 mg (15 in AM, 10 in PM) and high dose of 40 mg (30 in AM, 10 in PM) for 4 months.

Active Comparator: 2
isocaloric diet
Dietary Supplement: Isocaloric Diet
Subjects will eat an isocaloric diet for 4 weeks while taking hydrocortisone
Other Name: Weight stable diet

Primary Outcome Measures :
  1. Amounts of intra-abdominal fat and total fat at the end of the treatment period for each cortisol dose. [ Time Frame: After 4 months on each dose ]

Secondary Outcome Measures :
  1. Fasting Lipid levels, fat mass by DEXA, post-heparin lipase activity, insulin sensitivity, and fat biopsy [ Time Frame: After 4-months on each dose ]

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Subjects with complete adrenal failure as defined as spontaneous serum cortisol of levels less than 5 g/dl after 12 hours without glucocorticoid replacement and peak serum cortisol of < 5 g/dl 60 minutes after a 250 g ACTH stimulation test.
  • Subjects who are at their usual weight (weight stable for at least 1 year)
  • Subjects on stable replacement doses of any required hormone such as thyroid, sex hormones, mineralocorticoid replacement, growth hormone, and hydrocortisone for at least 6 months, and 4) have a normal body weight (BMI 19-27 kg/m2).

Exclusion Criteria:

  • Possible confounders on body weight and insulin resistance
  • Age less than 18 to exclude those who might be experiencing alterations in cortisol production or weight as a result of adolescent growth.
  • Subjects who exercise > 30 minutes/day, 3 times a week.
  • Smokers.
  • Heavy alcohol drinkers (> 2 drinks/ day).
  • Subjects with medical diagnosis including diabetes, heart disease, and cancer.
  • Subjects with psychiatric illness (i.e., depression, psychosis, bipolar, schizophrenia; or are taking medications for these disorders).

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00688987

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United States, Oregon
Oregon Health & Science University
Portland, Oregon, United States, 97239
Sponsors and Collaborators
Oregon Health and Science University
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Responsible Party: Jonathan Q. Purnell, OHSU - The Center for the Study of Weight Regulation
ClinicalTrials.gov Identifier: NCT00688987    
Other Study ID Numbers: eIRB 545
OCTRI #711
First Posted: June 3, 2008    Key Record Dates
Last Update Posted: June 5, 2008
Last Verified: June 2008
Additional relevant MeSH terms:
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Addison Disease
Nutrition Disorders
Body Weight
Adrenal Insufficiency
Adrenal Gland Diseases
Endocrine System Diseases
Autoimmune Diseases
Immune System Diseases
Anti-Inflammatory Agents