Non-HLA Genetics and Application to Living Donor Candidates.

Area of Science:

• Nephrology
• Immunology
• Genetics

Background:

• Non-human leukocyte antigen (non-HLA) genetic mismatches can trigger alloimmune responses, leading to graft rejection even in human leukocyte antigen (HLA)-matched kidney transplants.
• Non-HLA antibodies exacerbate adverse immunological outcomes.
• Genetic testing in living donors can identify monogenic kidney diseases, improving donor safety and enabling early intervention for at-risk individuals.

Purpose of the Study:

• To review the role of non-HLA genetic factors in kidney transplantation, focusing on living donor evaluation and outcomes.
• To highlight the potential of genetic testing for risk stratification beyond HLA matching, particularly for donors with a family history of hereditary kidney disease.

Main Methods:

• Review of current literature on non-HLA genetics in kidney transplantation.
• Analysis of the impact of genetic variations on alloimmune responses and transplant outcomes.
• Examination of the utility of genetic testing in living donor assessment.

Main Results:

• Non-HLA genetic factors, including single nucleotide variants, contribute to graft rejection and failure.
• Genetic testing in related living donors aids in detecting hereditary kidney diseases, enhancing donor safety.
• Polygenic risk scores and gene panels show potential for predicting complications and guiding post-transplant care, though research primarily focuses on recipients.

Conclusions:

• Integrating non-HLA genetic testing into living donor evaluation promotes precision medicine in kidney transplantation.
• Improved risk assessment and donor-recipient matching are facilitated by understanding non-HLA genetics.
• Longitudinal studies focusing on donor genetics are essential for optimizing transplant outcomes and ethical donor care.