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Desmopressin Stimulation Test Performance in ACTH-Dependent Cushing Syndrome
NCT06635629 · View on ClinicalTrials.gov ↗
Study Summary
Background: Cushing syndrome (CS) is a set of diseases that develop when the body produces too much adrenocorticotropic hormone (ACTH). ACTH stimulates the production of a hormone called cortisol. Excess cortisol can cause serious issues, such as diabetes, high blood pressure, weight gain, and mood changes. Diagnosing CS early can be difficult. One test used to diagnose CS, the desmopressin (Desmo) stimulation test (DesmoST), has not been studied in enough people to know how accurate it is. Objective: To find ways to improve the DesmoST. Researchers especially want to learn more about how well the DesmoST identifies people with specific ACTH CSs: Cushing disease (CD) and ectopic ACTH syndrome (EAS). Eligibility: People aged 18 to 70 years who have or may have CS, especially CD or EAS. Healthy volunteers are also needed. Design: Participants with CS will have 3 DesmoSTs at least 48 hours apart. The procedure for each is as follows: They will limit their fluid intake the day before each test. They will have nothing to eat or drink for 12 hours before the test. For 1 of the tests, they will take a pill that contains a hormone (dexamethasone). They will take it around 11 pm the day before the test. Desmo is given through a tube attached to a needle inserted into a vein. Blood will be drawn a total of 6 times before and after the desmo is given. Healthy volunteers will have 4 DesmoSTs. These will be 2 to 14 days apart. All participants will have follow-up visits 3 to 5 days after each test. These visits may be by phone.
Conditions Studied
Interventions
- DRUG Dexamethasone
- DRUG Desmopressin
Study Locations (1)
Maryland
- National Institutes of Health Clinical Center — Bethesda
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 140 participants |
| Start Date | 2024-12-12 |
| Est. Completion | 2029-01-01 |
| Phase | Phase 2 |
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Full Details on ClinicalTrials.gov ↗What the Registry Record Tells You About NCT06635629
The ClinicalTrials.gov registry entry for NCT06635629 describes a study currently listed as recruiting. It is categorized as Phase 2, which is the standard way researchers label where a study sits along the investigational pathway from early safety work through later efficacy and post-marketing evaluation. The registered enrollment target is 140 participants, a figure that helps gauge the scale of data the investigators plan to collect. The listed sponsor is National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), which has 375 total studies on file at ClinicalTrials.gov, and sponsors are the parties responsible for study design, oversight, and regulatory filings.
The record links to 1 condition, with Cushing Syndrome appearing as the primary indexed condition, and to 2 interventions — of which Dexamethasone is the first listed. Interventions can include drugs, devices, procedures, behavioral programs, or observational arms, and each is tracked as a separate registry field so that downstream queries can filter accurately. When a trial lists multiple interventions, it usually reflects a multi-arm design or a comparison protocol rather than a single treatment being tested in isolation. The brief summary published in the registry is the clearest source of protocol intent and should be read before drawing conclusions from any sidebar tags.
Geographic footprint matters for practical reasons: NCT06635629 reports 1 study location spanning 1 distinct geographic area — top geographies include Maryland. A larger site network tends to correlate with broader recruitment capacity, but it does not imply anything about study quality, and site-level enrollment status can diverge from the overall registry status shown above. Every data point on this page comes from the public ClinicalTrials.gov dataset and is reproduced here for reference only; it is not a medical recommendation, an endorsement of the sponsor, or an invitation to enroll. Verify current status, eligibility criteria, and contact details directly at ClinicalTrials.gov, and discuss any participation decision with your own healthcare provider.
Frequently Asked Questions
What is clinical trial NCT06635629 about?
NCT06635629 is a clinical study titled "Desmopressin Stimulation Test Performance in ACTH-Dependent Cushing Syndrome". Background: Cushing syndrome (CS) is a set of diseases that develop when the body produces too much adrenocorticotropic hormone (ACTH). ACTH stimulates the production of a hormone called cortisol. Excess cortisol can cause serious issues, such as diabetes, high blood pressure, weight gain, and mood...
What is the current status of trial NCT06635629?
This trial is currently recruiting. It is a Phase 2 study. The enrollment target is 140 participants. The study started on 2024-12-12. Estimated completion is 2029-01-01.
What conditions does trial NCT06635629 study?
This clinical trial studies the following conditions: Cushing Syndrome. These conditions were identified from the trial registry and reflect the primary focus areas of the research.
What interventions are being tested in trial NCT06635629?
The interventions under investigation include: Dexamethasone (DRUG), Desmopressin (DRUG). Each intervention is being evaluated for safety and efficacy as part of this clinical study.
Who is sponsoring clinical trial NCT06635629?
This trial is sponsored by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), which has 375 total clinical trials registered on ClinicalTrials.gov. The sponsor is responsible for the study's design, funding, and regulatory compliance.
Where is trial NCT06635629 being conducted?
This trial has 1 study location across Maryland. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.
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