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Aliskiren vs Hydrochlorothiazide in Hypertensive Type II Diabetic Patients on Resistance Arteries

NCT01480791 · Status: WITHDRAWN · Phase: PHASE2 · Type: INTERVENTIONAL

Last updated 2015-05-19

No results posted yet for this study

Summary

This study will be performed only at the Jewish General Hospital. It will investigate the effect of treatment with aliskiren, an inhibitor of renin, a substance produced by the kidney that constricts arteries and raises blood pressure, on the blood vessels, specifically the arteries, of subjects who have diabetes and elevated blood pressure (hypertension).

To investigate blood vessels, different techniques will be used. For large arteries, these will be studied by non invasive methods using detection of the pulse wave or using ultrasound over the skin of the neck, the wrist and the groin. To study small vessels, the investigators will perform a biopsy on the buttock, under local anesthesia, and obtain a small sample of tissue from under the skin, from which the vessels will be dissected. The investigators have performed many hundreds of these small biopsies over the past 20 years for similar studies without any complications. The biopsies are very well tolerated. From this research the investigators will thus be able to learn what the structure and function of these vessels is in these patients, in comparison to a normal healthy group.

The hypertensive diabetic subjects will then be assigned by chance (randomized trial) to treatment with the renin inhibitor aliskiren or a comparator, the diuretic hydrochlorothiazide. Aliskiren is a relatively new drug used to treat hypertension that is very well tolerated and is now being evaluated in numerous trials in hypertensive diabetic individuals. The diuretic is a well-know agent used to treat high blood pressure now for many years, and which is very well tolerated. Physicians, nurses and scientists involved in the study will be unaware of who is receiving which drug, as will be the patients (this is the meaning of double-blind trial). However, if there is any problem, the secret code will be broken and the individual withdrawn from the study. Subjects will be treated for a year, and the study procedures (non invasive and the biopsy) repeated at 6 months and after one year of treatment. During the study, blood samples will be drawn and urine collected at certain intervals to ensure safety of the treatment.

Once tissues are obtained they will be studied in the laboratory. The study of the vessels will allow treatment us to determine how the treatment with the renin inhibitor aliskiren affects the structure and function as well as cellular and molecular aspects of arteries of hypertensive diabetic persons. The investigators expect these studies to provide us knowledge on mechanisms and perhaps new targets for future therapies of cardiovascular disease and hypertension.

Conditions

Interventions

DRUG

Aliskiren vs. hydrochlorothiazide

Aliskiren will be used at increasing doses from 150 to 300 mg per day for 6-12 months.

DRUG

Hydrochlorothiazide

Hydrochlorothiazide will be used at increasing doses from 12.5 to 25 mg per day for 6-12 months.

Sponsors & Collaborators

Principal Investigators

  • Ernesto L Schiffrin, MD, PhD · SMBD-Jewish General Hospital

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
30 Years
Max Age
70 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2012-01-31
Primary Completion
2013-12-31
Completion
2013-12-31

Countries

  • Canada

Study Locations

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Entities

Diseases
Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01480791 on ClinicalTrials.gov