Genetic Predictors of Cardiovascular Disease
|First Received Date ICMJE||June 19, 2006|
|Last Updated Date||September 6, 2013|
|Start Date ICMJE||September 2005|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00339599 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Genetic Predictors of Cardiovascular Disease|
|Official Title ICMJE||Study of Chemokine Markers and Genes as Predictors of Cardiovascular Disease|
This study, conducted in collaboration with the Johns Hopkins University School of Medicine, will explore the genetic influences on susceptibility to atherosclerotic cardiovascular disease (ASCVD). Atherosclerosis is a chronic narrowing of the arteries caused by an incremental buildup of fatty substances on the linings of walls of arteries. This study will examine the role of genes related to the inflammatory process on the incidence of ASCVD and on levels of chemokines (proteins involved in inflammation).
DNA samples, chemokines levels and relevant clinical data from patients enrolled in Johns Hopkins's sibling and family heart studies are analyzed for specific gene markers. The studies include: Nurse Model in Black Families at Risk for Heart Disease; Genotypic Determinants of Aspirin Response in High Risk Families; and Coronary Disease Detection by Thallium SPECT and Fast CT. All of the enrolled patients have consented to have their DNA used for testing of genetic factors that may predict cardiovascular disease and do not contain patient identifier information.
Atherosclerosis is a chronic inflammatory disease classically triggered by hypertension, diabetes, smoking and elevated cholesterol.
It is hypothesized that genetic predisposition plays a crucial role in an individual's susceptibility to these risk factors with Single Nucleotide Polymorphisms (SNPs) being identified as functional mediators of key inflammatory genes.
To determine the frequency of haplotypes of SNP combinations in the proximal promoter region of MCP-1, the MCP-3 gene, and eotaxin gene in patients with risk factors for CVD and their siblings.
To determine the MCP-1 levels in an affected population with Coronary artery disease and their siblings and certain haplotypes to determine a functional association between MCP-1 levels and haplotype frequency.
Eligibility criteria for enrollment in sib and family studies included: 1) having a sib or 1st degree family member with heart disease, 2) ability to give inform consent to participate in the study, 3) age 18 years or older, 4) ability to speak English or Spanish. The entire set of 2,000 samples available to the LDG will be analyzed. No subject will be excluded.
DNAs derived from properly consented subjects enrolled in three protocols sponsored by the Johns Hopkins Heart Study will be sent to the LGD and used to test specific markers in the MCP-1, MCP-3, and eotaxin chemokine family located in the C-C chemokine cluster on chromosome17q11.2.
A minimum of 11 SNPs will be examined.
Sib-pair analysis will be utilized to identify associated markers. Linear regressions will be used to analyze associations between genetic variations and chemokine levels. Haplotype will be assigned to unrelated individuals using the maximum likelihood approach.
The DNA samples, chemokine levels, and relevant clinical data provided by John Hopkins University School of Medicine will be coded and linked.
Following this study, the DNAs will be maintained in our repository and curated through our central Laboratory database. Loss or destruction of these samples will be annotated to our database and cannot impact the study participants in any way. We understand that studies subsequent to the completion of this protocol will require additional OHSR/IRB approval prior to commencement.
|Study Type ICMJE||Observational|
|Study Design ICMJE||Not Provided|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Condition ICMJE||Cardiovascular Disease|
|Intervention ICMJE||Not Provided|
|Study Group/Cohort (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Estimated Enrollment ICMJE||2306|
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
Have a sibling or first degree family member with heart disease
Ability to give informed consent to participate in the study
Age 18 years or older
Ability to speak English or Spanish
|Ages||18 Years and older|
|Accepts Healthy Volunteers||No|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Location Countries ICMJE||United States|
|NCT Number ICMJE||NCT00339599|
|Other Study ID Numbers ICMJE||999905247, 05-C-N247|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Cancer Institute (NCI)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Institutes of Health Clinical Center (CC)|
|Verification Date||August 2013|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP