Examining Genetic Differences Among People With 21-Hydroxylase Deficiency
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
|Official Title:||Modifier Genes in 21-Hydroxylase Deficiency|
- Serum 17-hydroxyprogesterone/cortisol ratio [ Time Frame: After cosyntropin administration ]
- Many other serum and urine steroids, metabolites, and precursors [ Time Frame: Before and after cosyntropin administration ]
|Study Start Date:||August 2007|
|Study Completion Date:||March 2009|
|Primary Completion Date:||March 2009 (Final data collection date for primary outcome measure)|
Procedure: Hydrocortisone withdrawal
This is considered a non-standard treatment. On Day 1, participants will receive one 10-mg pill of hydrocortisone. On Day 3, participants will receive intravenously a medicine called cosyntropin, a synthetic form of a hormone that the body makes. Participants will receive one last pill of hydrocortisone prior to the end of the study.
CAH is a genetic steroidogenesis disorder. The most common form, 21OHD, leads to cortisol deficiency and, in turn, an excess of androgen, a hormone that promotes the development and maintenance of male sex characteristics. As a result of this androgen excess, prepubescent males and newborn, prepubescent, and grown females exhibit mature masculine characteristics. The symptoms and severity of 21OHD vary among individuals with the disease and in adults versus children. The reasons for these differences are not yet known. Current therapy for 21OHD consists of administration of glucocorticoids to replace cortisol and suppress excessive pituitary function. With more information about what genes or factors contribute to the severity of 21OHD, researchers may be able to better treat children and adults with the disease. This study will examine participants' DNA to determine what other genes may affect the severity of 21OHD and may make the disease milder in adults than in children.
People interested in participating in this 3-day inpatient study will first undergo a physical exam and provide a blood sample to determine eligibility. Eligible participants will be admitted to the study site in the morning on the first study day. A blood sample will be taken and participants will receive one 10-mg pill of hydrocortisone. Heart rates and blood pressures will be taken every 4 hours throughout the day. In the morning of Day 2, a blood sample will be taken and participants will be asked to urinate in the toilet. After this point and until the end of the study, participants will collect all urine in a jug. On the morning of Day 3, participants will complete urine collection and a blood sample will be taken. Participants will then receive intravenously a medicine called cosyntropin, a synthetic form of a hormone that the body makes. About 1 hour after this, participants will provide a final blood sample. Participants will receive one last pill of hydrocortisone prior to the end of the study.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00542841
|United States, New York|
|Mount Sinai School of Medicine|
|New York, New York, United States, 10029|
|United States, Texas|
|University of Texas Southwestern Medical Center|
|Dallas, Texas, United States, 75390|
|University of Sao Paolo|
|Sao Paolo, SP, Brazil, 06403-900|
|Principal Investigator:||Richard J. Auchus, MD, PhD||University of Texas Southwestern Medical Center|