Effect of the Aquaretic Tolvaptan on Nitric Oxide System (TORA)

NCT ID: NCT01638663

Last Updated: 2014-10-09

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2012-05-31

Study Completion Date

2014-03-31

Brief Summary

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The purpose of this study is to investigate the effect of tolvaptan on renal water, sodium and potassium excretion, plasma concentration of vasoactive hormones,central blood pressure, pulse wave velocity (PWV) and augmentation index, basal and during inhibition of nitric oxide synthesis in healthy subjects.

Detailed Description

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Tolvaptan is a vasopressin antagonist (V2-antagonist) and is used in treatment of hyponatremia. Animal studies have demonstrated that inhibition of V2 receptors in the renal principal cell increases renal free water clearance and renal sodium excretion.

Treatment with V2-receptor antagonists increases vasopressin concentration in plasma that stimulates V1-receptors in the vascular bed. This may change both central and peripheral hemodynamics and plasma concentration of vasoactive hormones. Changes in hemodynamics and hormone concentration may consequently change renal sodium and water handling.

The nitric oxide system plays a central role in both renal sodium and water handling and regulation of vascular tone and blood pressure.

The effects of tolvaptan the circulation and kidneys is investigated by using measurements of biomarkers specific for the sodium/water balance in the urine and by measurements of vasoactive hormones in the blood after administration of tolvaptan and L-NMMA infusion.

Conditions

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Cardiovascular Diseases Nephropathy

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Caregivers Investigators

Study Groups

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Tolvaptan

Oral administration of 15 mg Tolvaptan on each examination day.

Group Type ACTIVE_COMPARATOR

Tolvaptan

Intervention Type DRUG

15 mg pr day for 1 day

Placebo

Oral administration of 15 mg Unikalk tablet on each examination day.

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

1 tablet Unikalk 1 pr day for 1 day

Interventions

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Tolvaptan

15 mg pr day for 1 day

Intervention Type DRUG

Placebo

1 tablet Unikalk 1 pr day for 1 day

Intervention Type DRUG

Other Intervention Names

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Samsca Unikalk

Eligibility Criteria

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Inclusion Criteria

* Men and women, age 18-40 years
* Body Mass Index (BMI) 18,5-30 kg/m2

Exclusion Criteria

* Anamnestic or clinical signs of heart, lung, lever, kidney and brain disease
* Neoplastic disease
* Drug abuse
* Alcohol abuse
* Medical treatment except peroral anticontraceptive
* Pregnancy
* Smoking
* Abnormal blood and urine sample
* Abnormal ECG
* Blood donation within a month before examination
* Arterial hypertension (\>140 mmHg systolic and/or 90 mmHg diastolic)
Minimum Eligible Age

18 Years

Maximum Eligible Age

40 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Regional Hospital Holstebro

OTHER

Sponsor Role lead

Responsible Party

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Erling Bjerregaard Pedersen

Professor, MD, Dr.Sci.

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Safa Therwani, Bachelor

Role: PRINCIPAL_INVESTIGATOR

Medicinsk Forskning

Locations

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Safa Therwani

Holstebro, , Denmark

Site Status

Countries

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Denmark

Other Identifiers

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SAFA-1-2012

Identifier Type: -

Identifier Source: org_study_id

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