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Homocyst(e)ine, oxidative stress, and endothelium function in uremic patients
Z A Massy1, I Ceballos, B Chadefaux-Vekemens
1Division of Nephrology, INSERM U507, and Biochemistry A and B Laboratories, Necker Hospital, Paris, France. massy@necker.fr
Kidney International. Supplement
|February 13, 2001
Summary
Moderate hyperhomocysteinemia in uremic patients may impair blood vessel function by increasing oxidative stress and reducing nitric oxide. Further research is needed to confirm these findings and understand homocysteine
Area of Science:
- Nephrology
- Cardiovascular Science
- Oxidative Stress Research
Background:
- Uremic patients often exhibit moderate hyperhomocysteinemia and impaired endothelium-dependent vasodilation.
- The exact mechanisms linking hyperhomocysteinemia to endothelial dysfunction in uremia are not fully understood.
Purpose of the Study:
- To investigate the link between moderate hyperhomocysteinemia and endothelial dysfunction in uremic patients.
- To explore the role of reactive oxygen species and nitric oxide bioavailability in this relationship.
Main Methods:
- Review of experimental and clinical evidence.
- Analysis of preliminary findings in uremic patients.
Main Results:
- Preliminary data suggest hyperhomocysteinemia may contribute to endothelial dysfunction via increased reactive oxygen species and decreased nitric oxide bioavailability.
- These findings require confirmation through additional studies.
Conclusions:
- Moderate hyperhomocysteinemia is associated with endothelial dysfunction in uremic patients.
- Homocysteine-induced oxidant stress is a potential mechanism, but its relative importance needs further investigation.