Diurnal variation in PAI-1 activity predominantly confined to the 4g-allele of the PAI-1 gene

T. Hoekstra, J.M. Geleijnse, E.G. Schouten, C. Kluft

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)

Abstract

We examined the diurnal pattern in Plasminogen Activator Inhibitor- type 1 (PAI-1) activity and Plasminogen activator (t-PA) in relation to the 4G/5G-polymorphism in the promoter of the PAI-1 gene. The analyses were performed in the Arnhem Elderly Study, a population-based study of 598 elderly. A single blood sample was drawn and the time of blood sampling was recorded (between 8 a. m. and 5.30 p. m.). Plasma PAI-1 activity was strongly associated with time of blood sampling, showing the highest values in the early morning. The diurnal pattern was clearly present in the 4G/4G (n = 184) and 4G/5G (n = 275) genotypes, but not in the 5G/5G-genotype (n = 139). T-PA antigen showed a weak diurnal variation, which did not differ across the variants of the 4G/5G-polymorphism. Our findings raise the hypothesis that 5G-homozygotic persons may be relatively protected from diurnal variation in the occurrence of coronary events.
Original languageEnglish
Pages (from-to)794-798
JournalThrombosis and Haemostasis
Volume88
Publication statusPublished - 2002

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