Effects of Vitamin D on Renin Expression in Hypertensive Patients
Public ClinicalTrials.gov record NCT00585442. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
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Official title
Effects of Calcitriol (1α, 25-[OH]2 Vitamin D3) on Renin Expression in Hypertensive Patients Without Vitamin D Deficiency
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The cardiovascular effects of vitamin D therapy (in humans) have been documented only in patients with known vitamin D deficiency or hyperparathyroidism (a surrogate marker of inadequate vitamin D activity). It is unknown whether the cardiovascular benefits of vitamin D therapy extend beyond these patients to the general hypertensive population. We propose to directly measure the effect of vitamin D therapy on plasma renin activity (PRA), plasma renin concentration (PRC), renin transcription (in mononuclear leukocytes), and blood pressure in hypertensive (but otherwise healthy) patients in a randomized, controlled, experimental trial. This will be the first study to assess vitamin D receptor (VDR) biological (PRA, PRC, renin mRNA, and polymorphisms) and hypertensive activity in patients without vitamin D deficiency. We hypothesize that vitamin D inhibition of renin transcription will produce significant reductions in PRA, PRC, renin transcription, inflammatory cytokines, SBP, and DBP, with potential variation by VDR genotype. Such a result may prove to be significant in the treatment of hypertension, as even modest blood pressure reductions (5 mmHg) are associated with a 14% reduction in mortality due to stroke, a 9% reduction in mortality due to CHD, and a 7% overall reduction in all-cause mortality.
Study identification
- NCT ID
- NCT00585442
- Recruitment status
- Terminated
- Study type
- Interventional
- Phase
- Early Phase 1
- Enrollment
- 12 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 55 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Apr 30, 2007
- Primary completion
- May 31, 2008
- Completion
- May 31, 2008
- Last update posted
- May 26, 2016
2007 – 2008
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Utah | Salt Lake City | Utah | 84112 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00585442, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted May 26, 2016 · Synced Sep 6, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00585442 live on ClinicalTrials.gov.