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Related Experiment Videos

Factor VII hyperactivity in chronic dialysis patients.

K Kario1, T Matsuo, T Yamada

  • 1Department of Internal Medicine, Hyogo Prefectural Awaji Hospital, Sumoto, Japan.

Thrombosis Research
|July 1, 1992
PubMed
Summary

Chronic dialysis patients exhibit significant factor VII (F VII) hyperactivity, indicated by elevated F VII activity and antigen levels. This hyperactivity correlates with increased factor Xa activity, suggesting a prothrombotic state in long-term hemodialysis patients.

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Area of Science:

  • Hematology
  • Nephrology
  • Cardiovascular Medicine

Background:

  • Chronic dialysis patients often present with an increased risk of cardiovascular disease.
  • Understanding the hemostatic system's alterations in these patients is crucial for risk stratification.

Purpose of the Study:

  • To investigate factor VII (F VII) hyperactivity in patients undergoing chronic hemodialysis.
  • To assess markers of coagulation activation and endothelial cell injury in this population.

Main Methods:

  • Plasma levels of F VII activity (F VII c) and antigen (F VII Ag) were measured in 28 hemodialysis patients.
  • Prothrombin activation fragments 1 + 2 (F1 + 2), thrombin-antithrombin III complexes (TAT), and thrombomodulin were quantified.

Main Results:

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  • Marked elevation of F VII c (185%) and F VII Ag (153%) was observed in long-term dialysis patients.
  • An increased F VII c/F VII Ag ratio (1.23) indicated enhanced F VII zymogen activation, alongside decreased pseudocholinesterase activity.
  • Elevated F1 + 2 levels suggested factor Xa hyperactivity, while TAT levels correlated with thrombomodulin, implying hemodialysis-induced endothelial injury.

Conclusions:

  • Chronic dialysis is associated with significant factor VII hyperactivity and enhanced F VII activation.
  • Hemodialysis may induce thrombin generation, potentially leading to systemic endothelial cell injury.
  • Further research is needed to explore the clinical implications of these findings for cardiovascular risk in dialysis patients.