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Hyperviscosity syndrome in ovariectomized rats.

A M Plotnikova1, Z T Shulgau, T M Plotnikova

  • 1Institute of Pharmacology, Tomsk Research Center, Siberian Division of Russian Academy of Medical Sciences, Siberian State Medical University, Tomsk, Russia.

Bulletin of Experimental Biology and Medicine
|January 16, 2009
PubMed
Summary

Ovariectomy significantly raises blood viscosity by altering red blood cells and fibrinogen levels, leading to hyperviscosity syndrome. This study details the hormonal and hemorheological changes post-ovariectomy.

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Area of Science:

  • Reproductive endocrinology and hemorheology.

Background:

  • Ovariectomy, the surgical removal of ovaries, profoundly impacts hormonal balance.
  • Sex hormone reduction is known to influence various physiological processes, including blood properties.

Purpose of the Study:

  • To investigate the hemorheological consequences of ovariectomy.
  • To elucidate the mechanisms behind the observed increase in blood viscosity.

Main Methods:

  • Assessment of blood sex hormone levels.
  • Measurement of hematocrit and plasma fibrinogen content.
  • Evaluation of erythrocyte viscoelasticity and aggregation.

Main Results:

  • Ovariectomy led to decreased sex hormone levels.
  • Significant increase in blood viscosity was observed.

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  • Elevated hematocrit, plasma fibrinogen, and erythrocyte aggregation contributed to increased viscosity.
  • Disorders in erythrocyte viscoelastic characteristics were noted.

    • Conclusions:

    • Ovariectomy induces a hyperviscosity syndrome.
    • Alterations in hemorheological parameters, particularly macrorheology, are the primary drivers of this syndrome post-ovariectomy.