HYPGENE-GENETICS FITNESS OBESITY & RISK OF HYPERTENSION

Summary

Principal Investigator: T Rankinen
Abstract: DESCRIPTION (provided by applicant): 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 reninangiotensin 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.
Funding Period: 2004-01-16 - 2008-12-31
more information: NIH RePORT

Top Publications

  1. ncbi Cardiorespiratory fitness, BMI, and risk of hypertension: the HYPGENE study
    Tuomo Rankinen
    Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
    Med Sci Sports Exerc 39:1687-92. 2007
  2. ncbi Effect of endothelin 1 genotype on blood pressure is dependent on physical activity or fitness levels
    Tuomo Rankinen
    Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
    Hypertension 50:1120-5. 2007
  3. pmc A major haplotype block at the rho-associated kinase 2 locus is associated with a lower risk of hypertension in a recessive manner: the HYPGENE study
    Tuomo Rankinen
    Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
    Hypertens Res 31:1651-7. 2008

Scientific Experts

Detail Information

Publications3

  1. ncbi Cardiorespiratory fitness, BMI, and risk of hypertension: the HYPGENE study
    Tuomo Rankinen
    Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
    Med Sci Sports Exerc 39:1687-92. 2007
    ..Genetic factors contribute significantly to the interindividual differences in endurance training-induced changes in BP. However, similar data on the genotype-by-fitness interactions on the risk of hypertension are scarce...
  2. ncbi Effect of endothelin 1 genotype on blood pressure is dependent on physical activity or fitness levels
    Tuomo Rankinen
    Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
    Hypertension 50:1120-5. 2007
    ..Our study provides an illustrative example of how physical activity and fitness level modifies the associations between a candidate gene and outcome phenotype...
  3. pmc A major haplotype block at the rho-associated kinase 2 locus is associated with a lower risk of hypertension in a recessive manner: the HYPGENE study
    Tuomo Rankinen
    Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
    Hypertens Res 31:1651-7. 2008
    ..Identification of functional mutation(s) could thus help in the development of ROCK2-specific treatments...