Study of Protective Effects of Paricalcitol on Inner Layer of Vessels and Its Protective Effect on Inflammation

April 6, 2009 updated by: Indiana University School of Medicine

Anti-Inflammatory and Endothelial Protectant Effects of Paricalcitol

The study is about possible protective effects of paricalcitol (Zemplar) upon inflammation, blood pressure and kidney function. Kidney Inflammation occurs when white blood cells become abnormally stimulated and accumulate in the kidney and cause damage to the kidney. The purpose of this study is to determine if paricalcitol helps improve kidney injury, blood pressure control and kidney function in patients with chronic kidney disease. The study will last about 7 weeks and involves about 8 visits to the medical center.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

We hypothesize that use of paricalcitol in patients with chronic kidney disease will lead to improvement in oxidative stress, inflammation, endothelial function and subsequently ambulatory blood pressures and glomerular filtration rate. We will pursue our hypothesis by the three specific aims:

Aim 1: To compare oxidative stress markers in patients treated with paricalcitol before and after the study. Aim 2: To measure endothelial function by flow mediated dilation in patients with chronic kidney disease before and after paricalcitol. Aim 3: To measure actigraphy guided ambulatory blood pressure and GFR in the absence of changes in anti-hypertensive medications in patients with chronic kidney disease.

The study will be double blind randomized pilot trial in 24 patients with chronic kidney disease with 1:1:1 allocation to paricalcitol 1 microgram: paricalcitol 2 microgram: Placebo.

Study Type

Interventional

Enrollment (Actual)

24

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

  • United States
    • Indiana
      • Indianapolis, Indiana, United States, 46202
        • Richard A. Rodebush VA Medical Center

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 and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients with chronic kidney disease with estimated GFR of 30 mL/minute or more.
  • Patients receiving stable dose of ACE inhibitor or Angiotensin receptor blockers for at least one month.
  • Patients not currently hypertensive more than 180/110 mmHg by clinic blood pressure.
  • Hemoglobulin A1C< 11%

Exclusion Criteria:

  • Patients taking vitamin D analogs
  • Calcium> 10 mg/dL
  • Phosphorus>6 mg/dL
  • Patients with anticipated need of dialysis in the next 6 weeks
  • Patients unstable in the opinion of the investigator
  • Patients who have emergent need for starting IV iron
  • Patients who will be started on statins within the next 6 weeks
  • Patients currently taking PDE5 inhibitors
  • Patients allergic to radiocontrast, Zemplar or who can not take nitroglycerin
  • Patients known to be HIV positive
  • Patients who can not give informed consent

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

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Single Group Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: 3
Placebo
Drug: Placebo
Placebo
Active Comparator: 1
1 mcg paricalcitol
Drug: paricalcitol
1 mcg or 2 mcg for 4 weeks.
Other Names:
  • Zemplar
Active Comparator: 2
2 mcg paricalcitol
Drug: paricalcitol
1 mcg or 2 mcg for 4 weeks.
Other Names:
  • Zemplar

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Anti-Inflammatory Effects of Paricalcitol
Time Frame: 6 weeks
change in hsCRP level from baseline to 4 weeks
6 weeks
Endothelial Protectant Effects of Paricalcitol
Time Frame: 6 weeks
6 weeks

Secondary Outcome Measures

Outcome Measure
Time Frame
Effect of Paricalcitol on Hypertension
Time Frame: 6 weeks
6 weeks
Effect of Paricalcitol on Kidney Function
Time Frame: 6 weeks
6 weeks

Collaborators and Investigators

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

Sponsor

Indiana University School of Medicine

Collaborators

Abbott

Investigators

  • Principal Investigator: Rajiv Agarwal, MD, Indiana University School of Medicine

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

November 1, 2006

Primary Completion (Actual)

July 1, 2007

Study Completion (Actual)

July 1, 2007

Study Registration Dates

First Submitted

January 25, 2007

First Submitted That Met QC Criteria

January 26, 2007

First Posted (Estimate)

January 29, 2007

Study Record Updates

Last Update Posted (Estimate)

June 3, 2009

Last Update Submitted That Met QC Criteria

April 6, 2009

Last Verified

April 1, 2009

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 0510-04

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.

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