The Effect of High and Low Sodium Intake on Urinary Aquaporin-2 in Essential Hypertension

June 27, 2011 updated by: Regional Hospital Holstebro

The Effect of High and Low Sodium Intake on Urinary Aquaporin-2 in Essential Hypertension, During Basal Conditions and After Hypertonic Saline Infusion.

The aim of the study is to test the following hypotheses:

  • that the function and/or regulation of AQP2 and/or ENaC in the principal cells is abnormal in essential hypertension.
  • if an abnormal function of the principal cells is present in essential hypertension, this will become more pronounced at high and low sodium intake.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

50

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Denmark
      • Holstebro, Denmark, 7500
        • Department of Medical Research, Holstebro Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Caucasian men and women
  • Age 18-65 years
  • Arterial hypertension
  • Body mass index between 18.5 and 30 kg/m2

Exclusion Criteria:

  • Secondary hypertension
  • Isolated systolic hypertension
  • History or clinical signs of AMI, atrial fibrillation, disease of the heart valves, or chronic heart failure.
  • Malignant disease
  • Prior apoplexy
  • alcohol or drug abuse
  • Drug use except antihypertensives and oral contraceptives
  • Abnormal biochemical screening of the blood regarding: red and white blood count, s-creatinine (> 200 micromol/L), b-hemoglobin, p-Sodium, p- potassium, p-albumine, p-bilirubin, p-alanine aminotransferase, p-alkaline phosphatase, p-cholesterol and b-glucose.
  • Abnormal screening of the urine regarding: Blood, albumine and glucose.
  • abnormal electrocardiogram
  • Blood donation within one month of the first examination day
  • Unwillingness to participate

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
u-AQP-2
Time Frame: Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
fractional sodium excretion
Time Frame: Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
p-aldosterone
Time Frame: Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
p-vasopressin
Time Frame: Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.

Secondary Outcome Measures

Outcome Measure
Time Frame
uPGE2
Time Frame: Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
GFR
Time Frame: Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
u-p-AQP-2
Time Frame: Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
u-ENaC(alfa,beta,gamma)
Time Frame: Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
CH2O
Time Frame: Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
u-cAMP
Time Frame: Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.
Before and after hypertonic saline infusion after 4 days on high and low sodium diet, respectively.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Regional Hospital Holstebro

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

May 1, 2006

Primary Completion (Actual)

May 1, 2009

Study Completion (Actual)

August 1, 2009

Study Registration Dates

First Submitted

June 24, 2006

First Submitted That Met QC Criteria

June 24, 2006

First Posted (Estimate)

June 27, 2006

Study Record Updates

Last Update Posted (Estimate)

June 28, 2011

Last Update Submitted That Met QC Criteria

June 27, 2011

Last Verified

June 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • med.res.hos.2006.cc.02

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Essential Hypertension and Healthy Controls

Clinical Trials on Low Sodium Diet

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Saint Lucia

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

3
Subscribe