HYPGENE-Genetics Fitness Obesity & Risk of Hypertension

This study has been completed.
Sponsor:
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:
NCT00083811
First received: June 2, 2004
Last updated: December 3, 2008
Last verified: December 2008
  Purpose

To investigate the role of genetics in cardiorespiratory fitness, obesity, and risk of hypertension.


Condition
Cardiovascular Diseases
Heart Diseases
Hypertension
Obesity

Study Type: Observational

Resource links provided by NLM:


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

Study Start Date: January 2004
Study Completion Date: December 2008
Primary Completion Date: December 2008 (Final data collection date for primary outcome measure)
Detailed Description:

BACKGROUND:

Hypertension is a multifactorial disease with genetic and environmental factors contributing to the disease process. HYPGENE will investigate gene-fitness and gene-obesity interactions that relate to the development of hypertension during adulthood. The study uses the cohort of the Aerobics Center Longitudinal Study (ACLS) at the Cooper Clinic.

DESIGN NARRATIVE:

The HYPGENE Study is a collaborative effort between the Pennington Biomedical Research Center, the Cooper Institute, and Washington University in St. Louis. The aim of the study is to investigate the contributions of DNA sequence variation in candidate genes as well as their interactions with cardiorespiratory fitness and obesity to the risk of hypertension in participants of the Aerobics Center Longitudinal Study (ACLS). In the first phase (as of 12/01/03), a group of 1000 subjects, who were normotensive and free of cardiovascular disease and diabetes at the time of their first preventive medical examination (from 01/1987 to 02/2001) will be selected from the ACLS cohort. Half of these subjects (n=500) developed hypertension during the follow-up period (duration 2 to 16 years), whereas the other half remained normotensive. In the second phase (from 12/03 to 11/05), the sample size will be increased to 1500 subjects (750 cases and 750 controls). Cases are defined as individuals who were normotensive at baseline but developed essential hypertension during follow-up. Comparison individuals are those who also were normotensive at baseline and remained normotensive during follow-up. The ascertainment of the case-control status will be done during the subjects' return visits to the Cooper Clinic. A panel of biallelic single nucleotide polymorphisms in candidate gene loci will be typed. The candidate genes are selected based on their putative roles in the physiological pathways pertaining to the regulation of blood pressure by fitness and obesity, or on evidence of linkages and associations in previous studies. The candidates include endothelial factors contributing to vasodilation and vasoconstriction, beta-adrenergic receptors and their kinases, which mediate the effects of autonomic nervous system on cardiac function and vascular tone, the renin angiotensin system, and signaling molecules that mediate the effects of laminar shear stress on vascular wall enzyme activity and gene expression. Logistic regression modeling and classification and regression trees methodology will be used to analyze the contribution of genotype, fitness level and obesity, as well as their interactions, to the risk of hypertension. The HYPGENE study will produce novel data on the effects of genetic factors in the presence of either high or low cardiorespiratory fitness level or obesity or normal body weight on the development of hypertension. These data could ultimately lead to more efficient use of physical activity and body weight control in the primary and secondary prevention of hypertension.

  Eligibility

Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

No eligibility criteria

  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00083811

Sponsors and Collaborators
Investigators
Investigator: Tuomo Rankinen Pennington Biomedical Research Center
  More Information

No publications provided

ClinicalTrials.gov Identifier: NCT00083811     History of Changes
Other Study ID Numbers: 1252
Study First Received: June 2, 2004
Last Updated: December 3, 2008
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Cardiovascular Diseases
Heart Diseases
Obesity
Hypertension
Overnutrition
Nutrition Disorders
Overweight
Body Weight
Signs and Symptoms
Vascular Diseases

ClinicalTrials.gov processed this record on September 16, 2014