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Hyperhomocyst(e)inemia induces multiorgan damage.

A Miller1, V Mujumdar, E Shek

  • 1Department of Physiology and Biophysics, School of Medicine, The University of Mississippi Medical Center, Jackson 39216-4505, USA.

Heart and Vessels
|April 6, 2001
PubMed
Summary
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High homocysteine levels contribute to multiorgan damage in hypertension. This study shows homocysteine exacerbates hypertension and causes organ injury, highlighting its integrated role in disease.

Area of Science:

  • Biomedical research
  • Cardiovascular science
  • Nephrology

Background:

  • Hyperhomocysteinemia is linked to hypertension, stroke, and organ damage.
  • The role of homocysteine in multiorgan injury during hypertension requires further investigation.

Purpose of the Study:

  • To investigate the integrated role of homocysteine in multiorgan injury in spontaneously hypertensive rats (SHR).
  • To assess the impact of induced hyperhomocysteinemia on blood pressure, renal function, and organ structure.

Main Methods:

  • Utilized spontaneously hypertensive rats (SHR) and Wistar Kyoto (WKY) rats, with and without induced hyperhomocysteinemia.
  • Measured plasma and tissue homocysteine, arterial pressure, urinary protein, matrix metalloproteinase (MMP) activity, and creatinine phosphokinase (CK) isoenzymes.

Related Experiment Videos

  • Histological analysis of aorta, myocardium, kidney, and renalureter was performed.

    • Main Results:

    • Induced hyperhomocysteinemia significantly increased mean arterial pressure and urinary protein excretion in both SHR and WKY rats.
    • Elevated homocysteine levels correlated with increased neuronal MMP activity and induction of all three CK isoenzymes (MM, MB, BB), indicating multiorgan injury.
    • Histological examination revealed structural damage in the aorta, myocardium, kidney, and renalureter of hyperhomocysteinemic rats.

    Conclusions:

    • Homocysteine plays an integrated role in causing multiorgan injury, particularly affecting the endothelial/epithelial cell lining.
    • Hyperhomocysteinemia exacerbates hypertension and contributes to structural damage across multiple organs.
    • These findings underscore the pathological significance of homocysteine in cardiovascular and renal diseases.