Genotoxic damage in end-stage renal disease

Area of Science:

• Biomarkers
• Genomics
• Renal Disease

Background:

• End-stage renal disease (ESRD) patients face higher risks of cardiovascular events and cancer.
• Genomic instability may contribute to these comorbidities in ESRD.
• Prognostic biomarkers for genomic instability could guide interventions.

Purpose of the Study:

• To investigate genomic instability in ESRD patients on dialysis.
• To evaluate DNA damage and chromosome damage as potential biomarkers.
• To correlate genetic damage with clinical factors in ESRD.

Main Methods:

• Case-control study comparing ESRD patients (n=55) and healthy controls (n=39).
• Assays used: single-cell gel electrophoresis (leukocytes) and micronucleus cytome assay (buccal cells).
• Evaluated DNA damage, chromosome damage, cell proliferation, and cell death.

Main Results:

• ESRD patients exhibited significantly higher DNA damage and micronucleated cells compared to controls.
• DNA damage was more sensitive and valid than chromosome damage for distinguishing patients.
• Increased cell proliferation, cytokinetic defects, cell death, and decreased repair index were observed in patients.
• Genetic damage correlated with medication duration, dialysis duration, sex, and dietary patterns.
• Fortnightly dialysis patients showed elevated DNA damage and micronucleus frequency, possibly due to uremic toxicants.

Conclusions:

• Elevated DNA and chromosome damage in ESRD patients indicate genomic instability.
• These damage markers show potential as prognostic indicators for ESRD comorbidities.
• Timely interventions can be initiated based on these biomarkers.