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Regulation of Cortisol Metabolism and Fat Patterning

Information source: Oregon Health and Science University
ClinicalTrials.gov processed this data on August 23, 2015
Link to the current ClinicalTrials.gov record.

Condition(s) targeted: Obesity; Menopausal Syndrome

Intervention: Placebo injection (Drug); Depo Lupron/Aromatase inhibitor (Drug); Depo Lupron/placebo (Drug); placebo (Drug); Estrogen cream (Drug)

Phase: N/A

Status: Completed

Sponsored by: Oregon Health and Science University

Official(s) and/or principal investigator(s):
Jonathan Q. Purnell, M.D., Principal Investigator, Affiliation: OHSU - Center for the Study of Weight Regulation

Summary

The purpose of this study is to determine if estrogen or testosterone can affect cortisol levels and where fat builds up in our bodies.

Clinical Details

Official title: Regulation of Cortisol Metabolism and Fat Patterning

Study design: Allocation: Randomized, Endpoint Classification: Pharmacokinetics/Dynamics Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Basic Science

Primary outcome: To measure 24-hour CPR, free cortisol, and cortisol binding globulin levels in plasma; HSD 1 activity, glucocorticoid receptor binding, and cortisol levels in adipocytes; and urinary excretion of cortisol, cortisone and their metabolites.

Secondary outcome: To measure intramyocellular fat and intrahepatic fat by MRS, visceral and subcutaneous abdominal fat by CT scan, body composition (fat mass, lean mass, and bone mass) by DXA, and insulin sensitivity.

Detailed description: Subjects will be studied 3 or 4 times on the inpatient unit of the Oregon Clinical and Translational Research Center. During each visit, testing will include measuring the amount of whole body fat and fat in the stomach area, muscle, and liver; levels of cortisol in the blood, urine, and fat tissue (taken from a biopsy); how well insulin works (insulin sensitivity).

Eligibility

Minimum age: 18 Years. Maximum age: 62 Years. Gender(s): Both.

Criteria:

Inclusion Criteria:

- 40 postmenopausal women (age 40-62) and 30 men (age 18-45) will be recruited if they

are healthy, at their lifetime maximal weight, have been weight stable for at least six months prior to entry, have a BMI between 19 and 39. 9 kg/m2, and be willing to commit to not making significant changes to their diet or daily activities while enrolled in the study. Exclusion Criteria:

- Subjects will be excluded for potential confounders on body weight, cortisol

production rates, sex steroid metabolism, or contraindications to strong magnetic fields: 1. Age less than 18 to exclude those who might be experiencing alterations in cortisol production or weight as a result of adolescent growth 2. Subjects who exercise > 30 minutes/day, 3 times a week 3. Smokers 4. Heavy alcohol drinkers (> 2 drinks/ day) 5. Subjects with medical diagnosis including diabetes, heart disease, and cancer 6. Subjects with psychiatric illness (i. e., depression, psychosis, bipolar, schizophrenia; or are taking medications for these disorders) 7. BMI 40 kg/m2, since obesity influences levels of sex steroids and sex hormone binding globulin; or body weight > 136 kg (300 lbs), since this is the weight limit for the DEXA and MR machines 8. Presence of metal in the body such as body piercing, shrapnel, cardiac pacemakers or aneurysm clips 9. Endocrine diseases affecting body composition, such as untreated hypothyroidism or Cushing's syndrome, will be excluded by history and physical examination, or by laboratory evaluation if necessary.

- Women with a contraindication to estrogen use will also be excluded, including: an

estrogen dependent malignancy, active thrombophlebitis, history of deep venous thrombosis, hypertriglyceridemia, untreated hypertension, cardiovascular disease, migraine headaches, or current tobacco use.

- Women with frequent hot flashes or disrupted sleep will also be excluded since they

will be unlikely to tolerate randomization to placebo and continued symptoms and altered sleep cycles will independently affect cortisol secretion patterns.

- All volunteers will have had a normal mammogram within the previous 12 months.

- Any subject with previously unevaluated postmenopausal bleeding will not be included

and, instead, will be referred to a physician for evaluation.

- Women who underwent surgical menopause (bilateral ovariectomy) must be at least one

year out from their surgery before considered eligible so as to allow weight stabilization after the procedure.

- Men will have had a prostate exam by their primary health provider within the

previous year or by the PI at the time of screening for this study.

- Any subjects taking a blood thinning medication or with an abnormal exam will not be

included and, instead, will be referred to a physician for evaluation

Locations and Contacts

Oregon Health & Science University, Portland, Oregon 97239, United States
Additional Information

Starting date: May 2005
Last updated: June 4, 2012

Page last updated: August 23, 2015

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