ISSN:
1432-0428
Keywords:
Plasminogen activator inhibitor-1
;
hypertriglyceridaemia
;
VLDL
;
insulin
;
insulin sensitivity
;
minimal model
;
gamma glutamyl transpeptidase
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary Impaired fibrinolytic function secondary to elevated plasma plasminogen activator inhibitor-1 activity, hypertriglyceridaemia and hyperinsulinaemia are frequent findings in patients with coronary heart disease. It has been debated whether VLDL or insulin is the major regulator of plasma plasminogen activator inhibitor-1 activity. This study examines the relationships between plasma plasminogen activator inhibitor-1 activity and VLDL triglyceride concentration, fasting and post-oral glucose load insulin levels and insulin sensitivity, as estimated by the minimal model method. Subjects studied were randomly selected hypertriglyceridaemic (n=65) and age-matched normotriglyceridaemic (n=61) men, aged 40–50 years, recruited in a population survey. Plasma plasminogen activator inhibitor-1 activity was higher in the hypertriglyceridaemic than in the normotriglyceridaemic group (21±14 vs 10±8 mU/l; p〈0.01). The hypertriglyceridaemic group had higher serum insulin, basal as well as 2 h after intake of the oral glucose load, and a lower insulin sensitivity index. In univariate analysis, plasma plasminogen activator inhibitor-1 activity correlated positively with VLDL triglycerides in both the hyper- and normotriglyceridaemic groups (r=0.43 r=0.60, respectively) and negatively with the insulin sensitivity index (r=−0.35 r=−0.44, respectively). In multivariate analysis, VLDL triglyceride levels were found to be independently related to plasma plasminogen activator inhibitor-1 activity in both groups, whereas insulin sensitivity/serum insulin levels were not. An unexpected finding was that the serum activity of the enzyme gamma glutamyl transpeptidase appeared to influence the relationships for plasma plasminogen activator inhibitor-1 in the hypertriglyceridaemic group. In conclusion, this population-based study indicates that VLDL triglyceride concentration is one of the major determinants of plasma plasminogen activator inhibitor-1 activity in both normotriglyceridaemic and hypertriglyceridaemic men.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00400356
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