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Related Experiment Videos

Decrease in the plasma von Willebrand factor concentration following glucose ingestion: the role of insulin

R von Känel1, R A Nelesen, D T Le

  • 1Department of Psychiatry, University of California, San Diego, CA 92093-0804, USA.

Metabolism: Clinical and Experimental
|December 6, 2001
PubMed
Summary

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Plasma von Willebrand factor (vWF) decreases after glucose intake, linked to the nervous system, not insulin sensitivity. This finding may explain elevated vWF in insulin resistance, possibly due to hypertension-related endothelial dysfunction.

Area of Science:

  • Cardiovascular Science
  • Metabolic Syndrome Research
  • Hemodynamics and Biomarkers

Background:

  • Elevated plasma von Willebrand factor (vWF) is linked to cardiovascular events in insulin resistance syndrome.
  • Understanding vWF's response to metabolic challenges is crucial for cardiovascular risk assessment.

Purpose of the Study:

  • To investigate the impact of an oral glucose challenge on plasma vWF levels.
  • To explore the relationship between vWF changes, metabolic factors, and hemodynamic alterations.
  • To determine if insulin sensitivity influences vWF response to glucose intake.

Main Methods:

  • Forty subjects (normotensive and hypertensive) underwent an oral glucose tolerance test (OGTT).
  • Plasma vWF antigen, glucose, insulin, catecholamines, and hemodynamics were measured at intervals post-glucose.

Related Experiment Videos

  • Insulin sensitivity was assessed using the insulin sensitivity index (ISI(0,120)).

    • Main Results:

    • Resting vWF correlated with screening systolic blood pressure.
    • vWF antigen, epinephrine, and diastolic blood pressure decreased post-glucose challenge.
    • vWF decrease was associated with epinephrine decline and systolic blood pressure, but not insulin sensitivity (ISI(0,120)).

    Conclusions:

    • Plasma vWF concentration decreases following glucose ingestion.
    • The observed vWF changes are linked to sympathetic nervous system function, not insulin sensitivity.
    • Hypertension-induced endothelial dysfunction, rather than metabolic dysregulation, may explain elevated vWF in insulin resistance.