Impact of adipose tissue on plasma plasminogen activator inhibitor-1 in dieting obese women.
The increased incidence of cardiovascular diseases in obese subjects could be partially attributed to impaired fibrinolysis due to elevated plasma levels of tissue plasminogen activator inhibitor 1 (PAI-1). The associations between changes in plasma PAI-1, metabolic variables, and adipose tissue during weight loss and regain were studied in 52 healthy, premenopausal, obese women participating in a weight reduction program with a hypocaloric diet. PAI-1, insulin, triglyceride, leptin, and adipsin levels were determined at entry, after the first week, after completion of the program, and after 5 months of follow-up. In the 33 obese women who completed the program, decreases in PAI-1 antigen (-54%), PAI activity (-74%), and leptin (-51%), but not of adipsin, were observed. Changes in PAI-1 were associated with changes in body mass index (BMI), body fat, leptin, and insulin. The decreased level of PAI-1 remained low after follow-up in the 14 women who maintained their reduced weight but increased in the 16 women who regained weight. This increase in PAI-1 was correlated with an increase in body fat and leptin. On multivariate analysis, BMI was the major determinant of PAI-1 level. In conclusion, during weight reduction with a hypocaloric diet, the decrease in PAI-1 is more closely related to changes in adipose tissue than to changes in metabolic variables, suggesting a significant role for adipose tissue in regulating plasma levels of PAI-1.
Mavri
A
A
University Medical Centre, Department of Angiology, Ljubljana, Slovenia.
Stegnar
M
M
Krebs
M
M
Sentocnik
J T
JT
Geiger
M
M
Binder
B R
BR
D000273:Adipose Tissue / Q000502:physiology*; D000328:Adult; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008875:Middle Aged; D009765:Obesity / Q000097:blood* / Q000178:diet therapy; D017395:Plasminogen Activator Inhibitor 1 / Q000097:blood*; D015431:Weight Loss
D017395:Plasminogen Activator Inhibitor 1