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ARIC研究:低蛋白C水平与缺血性卒中和冠心病发生率的关系

临床研究

1970-01-01      

2408 0

    Low protein C and incidence of ischemic stroke and coronary heart disease: the Atherosclerosis Risk in Communities (ARIC) Study.
    Folsom AR, Ohira T, Yamagishi K, Cushman M.
    Division of Epidemiology & Community Health, School of Public Health, University of Minnesota, Minneapolis, MN 55454, USA. folso001@umn.edu
Abstract
    BACKGROUND: Protein C is an important plasma natural anticoagulant. Although protein C deficiency increases risk of venous thrombosis, it remains uncertain whether low protein C increases risk of atherothrombosis.
    OBJECTIVE: To examine whether low protein C may be a risk factor for ischemic stroke or coronary events in a prospective population-based study.
    PATIENTS/METHODS: The Atherosclerosis Risk in Communities Study assessed protein C antigen by ELISA at baseline in 1987-89 and followed participants (n = 13 879) for incident ischemic stroke or coronary events through 2005.
RESULTS: Over a median of 16.9 years of follow-up, 613 ischemic strokes and 1257 coronary heart disease events occurred. Protein C was inversely associated with incidence of ischemic stroke. Adjusted for multiple risk factors, the rate ratios (95% CIs) from highest to lowest quintiles were 1.0, 1.16 (0.90-1.50), 1.22 (0.94-1.58), 1.18 (0.90-1.55) and 1.52 (1.17-1.98). This inverse association was stronger for non-lacunar and cardioembolic stroke than for lacunar stroke. In contrast, there was a positive association between protein C and coronary heart disease in incompletely adjusted models, but no association after adjustment for plasma lipids.
    CONCLUSIONS: In this cohort study, low protein C was a risk factor for incident ischemic stroke but not coronary heart disease. Levels of protein C associated with stroke risk were not restricted to the traditional ’deficient’ range for protein C (< 0.5 percentile), suggesting that other etiologies for a lower protein C, or genetic variants associated with more subtle changes in protein C, are playing a role in disease pathogenesis.
 

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科研资讯(站内): ARIC研究 蛋白C 缺血性卒中 冠心病 发生率

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