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Assessment of Vascular Function in Patients With Chronic Kidney Disease
Published on: June 16, 2014
Effect of a single hemodialysis session on endothelial dysfunction.
Prabhakar Reddy Errakonda1, Ramakrishna Paladugu, Aparna R Bitla
1Department of Biochemistry, Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India.
Journal of Nephrology
|June 12, 2010
Summary
Hemodialysis increases nitric oxide (NO) production but also oxidative stress (OS), leading to endothelial dysfunction. Reducing OS during hemodialysis is crucial for patient benefit.
Area of Science:
- Nephrology
- Cardiovascular Biology
- Biochemistry
Background:
- Endothelial dysfunction mechanisms during hemodialysis remain unclear.
- Hemodialysis may induce endothelial dysfunction through various biochemical pathways.
- Understanding these pathways is vital for improving patient outcomes.
Purpose of the Study:
- To investigate biochemical markers of endothelial dysfunction during hemodialysis.
- To elucidate the mechanistic link between hemodialysis and endothelial dysfunction.
- To assess changes in specific biomarkers within a single dialysis session.
Main Methods:
- Evaluated plasma levels of nitrate, arginine (ARG), citrulline, asymmetric dimethylarginine (ADMA), homocysteine (Hcy), malondialdehyde (MDA), and lipoprotein-associated phospholipase A2 (LpPLA2).
- Studied 27 patients with end-stage renal disease undergoing maintenance hemodialysis.
- Employed repeated measures ANOVA and generalized estimating equations for statistical analysis.
Main Results:
- Nitrate levels significantly increased post-dialysis (p<0.001).
- Homocysteine (p<0.05) and ADMA (p<0.001) levels decreased, while the ARG/ADMA ratio increased (p<0.001).
- Increased MDA indicated oxidative stress, with nitrate levels negatively associated with Hcy, ADMA, and LpPLA2 activity.
Conclusions:
- Dialysis enhances nitric oxide (NO) production but is counteracted by increased oxidative stress (OS), promoting endothelial dysfunction.
- Strategies to mitigate OS during hemodialysis are necessary.
- Reducing OS could maximize the benefits of clearing NO synthase inhibitors.
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