Dose Response Relationship for Single Doses of Corticotropin Releasing

Status Completed

Clinical Trial Summary

Corticotropin Releasing Hormone (CRH) is a hypothalamic hormone made up of 41 amino acids. Amino acids are proteins that when combined make up different substances, like hormones. The order of amino acids in CRH, has been determined, meaning that the hormone can now be synthetically reproduced in a laboratory setting.

When CRH is released from the hypothalamus it stimulates the pituitary gland to secrete another hormone, ACTH. ACTH then causes the adrenal glands to make a third hormone, cortisol. This process is known as the hypothalamic-pituitary-adrenal axis. Problems can occur in any of the steps of this process and result in a variety of diseases (Cushing's Syndrome and adrenal insufficiency).

Researchers hope that CRH created in a laboratory setting, ovine CRH (oCRH) can be used to help diagnose and treat conditions of the HPA axis. This study will test the relationship for single doses of oCRH in normal volunteers and patients with disorders of the HPA axis. The oCRH will be injected into the patients vein as a single injection or slowly through an IV line over 24 hours. The participants will have blood tests taken to measure hormone levels before, during, and after receiving the oCRH.

Clinical Trial Description

Corticotropin-releasing hormone (CRH) is a 41 amino acid hypothalamic peptide whose chemical structure has recently been determined after more than two decades of intensive research. This peptide stimulates secretion of ACTH by the corticotroph cells of the pituitary gland. As with the previously discovered hypothalamic hormones, CRH has important diagnostic and therapeutic applications. This study seeks to explore these clinical applications by determining the dose-response relationship for single doses of ovine CRH (oCRH) in normal volunteers and in patients with disorders of the hypothalamic-pituitary-adrenal axis. CRH is administered intravenously at doses up to 10 pg/kg, given as a bolus or up to 1 ug/kg/b as a continuous infusion lasting up to 24 hours. Plasma levels of ACTH, cortisol and CRH are measured before, during and after CRH administration. ;

Study Design

N/A

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT00001180
Study type	Observational
Source	National Institutes of Health Clinical Center (CC)
Contact
Status	Completed
Phase	N/A
Start date	March 1982
Completion date	June 2005

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Dose Response Relationship for Single Doses of Corticotropin Releasing Hormone (CRH) in Normal Volunteers and in Patients With Adrenal Insufficiency

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms