Weight-Loss Induced Changes in Plasma Factor VII Coagulant Activity and Relation to the Factor VII Arg/Gln353 Polymorphism in Moderately Obese Adults

James S. Pankow; Aaron R. Folsom; Eyal Shahar; Michael Y. Tsai; Robert W. Jeffery; Rena R. Wing

doi:10.1055/s-0037-1615065

Thrombosis and Haemostasis, Table of Contents

Thromb Haemost 1998; 79(04): 784-789
DOI: 10.1055/s-0037-1615065

Rapid Communication

Schattauer GmbH

Weight-Loss Induced Changes in Plasma Factor VII Coagulant Activity and Relation to the Factor VII Arg/Gln₃₅₃ Polymorphism in Moderately Obese Adults

James S. Pankow

¹From the Department of Epidemiology, School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC

,

Aaron R. Folsom

²From the Division of Epidemiology, School of Public Health, University of Minnesota, Minneapolis, MN

,

Eyal Shahar

²From the Division of Epidemiology, School of Public Health, University of Minnesota, Minneapolis, MN

,

Michael Y. Tsai

³From the Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Minneapolis, MN

,

Robert W. Jeffery

²From the Division of Epidemiology, School of Public Health, University of Minnesota, Minneapolis, MN

,

Rena R. Wing

⁴From the Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, Pittsburgh, PA, USA

› Author Affiliations

Abstract

Summary

Elevated plasma factor VII coagulant activity (factor VIIc) may be an independent risk factor for coronary heart disease. Several cross-sectional studies suggest that a polymorphism of the factor VII gene (ArgGln₃₅₃) interacts with plasma triglyceride level in determining factor VIIc, but prospective data are lacking. Factor VII genotype, factor VIIc, and triglyceride level were measured in moderately obese adults aged 25 to 45 who underwent a six-month clinical trial to evaluate strategies for weight loss. A total of 48 men and 50 women who experienced substantial weight loss (mean: 10 kg) provided samples for genetic analysis. Overall, 78% of participants were homozygous for the Arg₃₅₃ allele, while the remaining 22% were heterozygous (Arg/Gln₃₅₃). At the baseline examination, heterozygotes had lower mean factor VIIc than Arg₃₅₃ homozygotes (92% vs. 112%; p<0.001), and genotype explained 18% of the variance of factor VIIc. Average six-month weight loss was similar in both genotypes; mean reductions in factor VIIc following weight loss were greatest among Arg₃₅₃ homozygotes with high initial values (>120%). Cross-sectional and longitudinal associations between plasma factor VIIc and triglyceride level were not dependent on genotype. These data confirm that the Gln₃₅₃ allele is associated with lower factor VII coagulant activity in moderately obese adults, but they do not support the hypothesis that the Arg-Gln₃₅₃ polymorphism interacts with plasma triglyceride level in determining factor VIIc.

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References

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