Genotyping for TRPC6, ACTN4, CD2AP, WT1, INF2, NPHS2 and NPHS1 was performed in all patients with primary FSGS and ESRD registered on the waiting list for kidney transplantation of a large German transplant center (n = 26 out of 478 registered patients).
We present a 12-year-old girl with rapidly progressive FSGS and end-stage renal disease in her native kidneys associated with heterozygous mutations in NPHS1 and in NPHS2, suffering from early post-transplant recurrence.
Mutations of NPHS1 or NPHS2, the genes encoding for nephrin and podocin, lead to early onset of heavy proteinuria, and rapid progression to end-stage renal disease, suggesting that both proteins are essential for the integrity of the glomerular filter.