Screening for NPHS2 mutations may help predict FSGS recurrence after transplantation

Area of Science:

• Nephrology
• Genetics
• Transplantation

Background:

• Steroid-resistant focal segmental glomerulosclerosis (FSGS) frequently recurs after kidney transplantation.
• Identifying factors influencing FSGS recurrence is crucial for improving patient outcomes.

Purpose of the Study:

• To investigate genotype-phenotype correlations in recurrent FSGS.
• To determine the role of NPHS2 mutations in post-transplant FSGS recurrence.

Main Methods:

• An international survey of 83 patients with childhood-onset primary FSGS who underwent renal transplantation.
• Genetic analysis for NPHS2 mutations in 53 of these patients.

Main Results:

• FSGS recurred in 36% of patients after their first transplant and 48% after a second transplant.
• None of the 11 patients with homozygous or compound heterozygous NPHS2 mutations experienced FSGS recurrence.
• In contrast, 45% of patients without NPHS2 mutations developed recurrent FSGS.

Conclusions:

• NPHS2 mutations are associated with a lack of FSGS recurrence post-transplantation.
• Genetic testing for NPHS2 mutations may be valuable for predicting FSGS recurrence risk and guiding treatment decisions before and after kidney transplantation.