Overview

This trial is active, not recruiting.

Conditions cardiovascular diseases, heart diseases, atherosclerosis, coronary arteriosclerosis
Sponsor University of Minnesota - Clinical and Translational Science Institute
Collaborator Northwestern University
Start date August 1996
End date May 2020
Trial size 5115 participants
Trial identifier NCT00005393, 4299

Summary

To measure serum concentrations of alpha tocopherol, selenium and all major carotenoids (alpha- and beta- carotene, lutein, (beta-cryptoxanthin and lycopene) in Black and white, male and female, high and low education individuals aged 18-30 in 1985-86. In subsequent renewals additional markers of oxidative stress and endothelial dysfunction have been measured in blood collected 7 to 30 years after baseline.

United States No locations recruiting
Other Countries No locations recruiting

Study Design

Observational model cohort
Time perspective prospective

Primary Outcomes

Measure
Clinical cardiovascular disease
time frame: Annual participant contact

Secondary Outcomes

Measure
subclinical cardiovascular disease
time frame: every 5 years

Eligibility Criteria

Male or female participants from 17 years up to 35 years old.

No eligibility criteria

Additional Information

Official title Epidemiology: Oxidative Stress and Early Atherosclerosis
Principal investigator David R Jacobs, PhD
Description BACKGROUND: Low blood antioxidant concentrations are associated with several major degenerative diseases including cardiovascular disease and cancer. Animal, cellular and chemical experiments have elucidated biologic mechanisms consistent with antioxidant protection against several disease processes. Determinants of blood antioxidant concentrations are not well understood in young adults. The main scientific outcome of this research will be information on distribution and correlates of blood antioxidant concentrations, useful for formulating public health messages concerning maintenance of adequate levels of alpha tocopherol, selenium, ascorbic acid and the carotenoids. DESIGN NARRATIVE: An analysis was conducted using serum stored at 70 degrees Celsius, collected in 1985-86 (n=5115) and 1992-93 (n=4086). These analytes were stable in serum samples collected, handled and stored under conditions used in this study. Integrity of the chemical analysis throughout the study was maintained by proven laboratory quality control procedures. Monitoring analyte concentrations in serum from collections seven years apart allowed analysis of age and time dependent changes in serum antioxidants. These data were linked with extensive pre-existing sociodemographic, dietary, other behavioral and physiologic data for the cohort. Statistical analyses provided information on the population's serum antioxidant distribution, tracking, change and major determinants in diverse young adults. In addition, these data established baseline and 7-year change concentration values for followup of this large CARDIA cohort, though the relationship of these serum antioxidants to disease endpoints was not itself part of the work scope. Study of plasma ascorbic acid, which is not stable under our storage conditions, was initiated using fresh samples to be collected in 1995-96 (n=4000). The Young Adult Longitudinal Study of Antioxidants (YALTA), ancillary to CARDIA study, was renewed in fiscal year 2000 to obtain additional blood and urine samples in the year 15 exam of the CARDIA participants. New measures of circulating lipid, protein, and DNA oxidation products (F2-isoprostanes, advanced glycosylation end-products [AGE], chlorinated and nitrosylated tyrosine, platelet aggregating factor (PAF) acetylhydrolase, paroxonase), urinary DNA damage, soluble intercellular adhesion molecule (ICAM), soluble P-selectin, and relevant genetic polymorphisms. The specific endpoints at the 15 year exam were coronary artery calcification as measured by computed tomography and microalbuminuria. The study was renewed in 2004 through 2008. Blood and urine was collected from subjects at the CARDIA year 20 exam to remeasure blood F2 isoprostanes, phospholipase A2, superoxide dismutase and carotenoids and tocopherols. Oxidized low density lipoprotein (LDL) and myeloperoxidase was also measured and analysis conducted of the association of antioxidant and oxidative damage levels and the development of subclinical macrovascular disease in this still-young group. The study renewed for a fourth time in 2010 through 2015, and a renewal application for a fifth renewal period was submitted in summer, 2014. It continues to write reports about different feature of oxidative stress and related phenomena as the CARDIA subjects age.
Trial information was received from ClinicalTrials.gov and was last updated in September 2014.
Information provided to ClinicalTrials.gov by University of Minnesota - Clinical and Translational Science Institute.