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Research Article| Volume 101, ISSUE 2, P225-234, July 1993

Dietary effects on circadian fluctuation in human blood coagulation factor VII and fibrinolysis

DOI:https://doi.org/10.1016/0021-9150(93)90119-F
Dietary effects on circadian fluctuation in human blood coagulation factor VII and fibrinolysis
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      Abstract

      Six healthy male volunteers were served 4 strictly controlled isoenergetic diets differing in fat (20% or 50% of energy) and fiber contents (2 or 4 g/MJ) for periods of 2 days. The diets were served in random order with at least 5 days separating each diet period. Blood samples for determination of factor VII clotting activity using human (FVIIc) and bovine thromboplastin (MIN), and for assessment of factor VII antigen (FVIIag), tissue-plasminogen activator (t-PA) antigen, plasminogen activator inhibitor-1 (PAI-1) antigen, PAI activity, t-PA and euglobulin fibrinolytic activity, and triglyceride and insulin levels were collected regularly on the second day of each diet period. The high-fat diets resulted in significantly increased postprandial MIN levels (peak values: 131% vs. 95%, P < 0.01), and higher postprandial FVIIbt/FVIIag ratios (peak values: 1.42 vs. 1.16, P < 0.01) compared with the low-fat diets. Fibrinolytic variables were not affected by the dietary changes and consistently showed characteristic U-shaped (t-PA and PAI-1 antigen, PAI activity), or inverted U-shaped (t-PA and euglobulin fibrinolytic activity) circadian patterns with troughs and peaks, respectively, at 17:30-21:30 h. The dietary fiber content had no significant influence on any of the measured variables. Our findings indicate that high-fat diets may increase blood thrombogenicity by virtue of augmented postprandial activation of factor VII.

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      Article info

      Publication history

      Accepted: March 23, 1993
      Received in revised form: March 11, 1993
      Received: November 12, 1992

      Identification

      DOI: https://doi.org/10.1016/0021-9150(93)90119-F

      Copyright

      © 1993 Published by Elsevier Inc.

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