DNA damage in kidney transplant patients. Role of organ origin

Area of Science:

• Genomic damage and DNA repair
• Nephrology and transplantation science
• Biomarkers of cellular damage

Background:

• Chronic kidney disease (CKD) is associated with elevated genomic damage, worsening with reduced kidney function.
• Hemodialysis patients exhibit maximum levels of genomic damage.
• Kidney transplantation improves renal function and patient survival.

Purpose of the Study:

• To evaluate changes in DNA damage levels following kidney transplantation.
• To compare DNA damage in living donor versus cadaveric donor recipients.
• To assess the relationship between renal function improvement and genomic damage post-transplant.

Main Methods:

• Utilized the alkaline comet assay to quantify DNA breaks and oxidative DNA damage.
• Employed the micronucleus assay to detect chromosomal breakage and aneuploidy.
• Monitored 50 CKD patients at 6 and 12 months post-kidney transplantation.

Main Results:

• All patients exhibited increased genomic damage levels at 6 and 12 months post-transplantation compared to pre-transplant levels.
• Despite improved metabolic functions, DNA damage increased after transplantation.
• Advanced donor age positively correlated with higher DNA damage.
• Genomic damage was significantly lower in living donor transplants compared to cadaveric donor transplants.

Conclusions:

• Kidney transplantation leads to an increase in DNA damage, even with improved renal function.
• Cadaveric donor transplants are associated with higher levels of genomic damage than living donor transplants.
• Donor characteristics, such as age and type, influence post-transplant genomic damage levels.