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Molecular Epidemiology of Essential Hypertension

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00005377
First Posted: May 26, 2000
Last Update Posted: March 17, 2014
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
  Purpose
To localize individual genes, called blood pressure quantitative trait genes [BPQTGs], which influence blood pressure levels in the population-at- large, and to determine if these genes are able to predict the occurrence of essential hypertension or coronary artery disease.

Condition
Cardiovascular Diseases Heart Diseases Coronary Disease Hypertension

Study Type: Observational

Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Study Start Date: July 1994
Study Completion Date: May 2009
Primary Completion Date: May 2009 (Final data collection date for primary outcome measure)
Detailed Description:

BACKGROUND:

Essential hypertension reaches epidemic proportions among adults and is a significant risk factor for premature coronary artery disease [CAD] and stroke. The research to localize BPQTGs represents an initial step toward applying DNA information to early identification of at-risk individuals and understanding the complex relationships among blood pressure, essential hypertension, and coronary artery disease.

DESIGN NARRATIVE:

The study has four aims. Aim 1 uses robust sibling pair linkage methods, parental marker data, and office blood pressure levels measured on 1,376 full sibling pairs to localize BPQTGs to regions of the human genome marked by highly polymorphic tandem repeat loci in or very near to 59 genes involved in blood pressure regulation. These genes were selected based on their involvement in the renin/angiotensin system, ion transport, cardiac physiology, biometabolism of neurotransmitters, or carbohydrate and lipid metabolism. At each gene, a highly polymorphic tandem repeat marker locus has already been identified. Aim 2 uses methods of association analysis for related individuals and office blood pressure levels measured on 587 full sibships to localize BPQTGs to regions of the human genome marked by the 59 candidate BPQTGs. Aim 3 determines if variation in these BPQTGs improves the ability to predict differences in blood pressure levels in a sample of 1,166 unrelated normotensive adults or essential hypertension status in a sample of 1,160 unrelated grandparents beyond that provided by established predictors. Aim 4 determines if variation in these BPQTGs improves the ability to predict symptomatic or asymptomatic coronary artery disease status beyond that provided by established predictors including blood pressure and essential hypertension. Aims 3 and 4 also ask whether the predictive relationship of the traditional risk factors to blood pressure, essential hypertension, or coronary artery disease is different among genotypes at these BPQTGs.

The study was renewed in FY 1999 to continue data analysis.

  Eligibility

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Criteria
No eligibility criteria
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00005377


Sponsors and Collaborators
National Heart, Lung, and Blood Institute (NHLBI)
Investigators
OverallOfficial: Eric Boerwinkle University of Texas
  More Information

Publications:

ClinicalTrials.gov Identifier: NCT00005377     History of Changes
Other Study ID Numbers: 4275
First Submitted: May 25, 2000
First Posted: May 26, 2000
Last Update Posted: March 17, 2014
Last Verified: May 2009

Additional relevant MeSH terms:
Hypertension
Cardiovascular Diseases
Heart Diseases
Coronary Disease
Coronary Artery Disease
Vascular Diseases
Myocardial Ischemia
Arteriosclerosis
Arterial Occlusive Diseases