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Recurrence of de novo membranous glomerulonephritis on renal grafts
L Heidet1, M E Gagnadoux, A Beziau
1Department of Pediatric Nephrology, Hôpital Necker-Enfants Malades, Paris, France.
Abstract:
An updated study of the glomerular lesions found in renal grafts in children showed 3 features of interest. 1) In our experience, the incidence of the occurrence of de novo membranous glomerulonephritis (MGN) remains around 9% (48 of 530 grafts). 2) Of the 29 patients we reported in a previous study [Antignac et al. 1988], 18 lost their grafts and 7 received a second graft. Four of these 7 patients recurred de novo MGN on their second graft. Their clinical course is reported in detail. 3) In our population of transplanted children, of the 55 patients who received a second graft, the only recipients who developed a de novo MGN were the 4 patients who had already developed de novo MGN on their first graft. The various factors possibly involved in the pathogenesis of de novo MGN are reviewed. The high incidence of recurrence of de novo MGN indicates that host factors play a major role in the development of this nephropathy.
Insights
De novo membranous glomerulonephritis (MGN) occurs in 9% of pediatric kidney transplants. Recurrence in subsequent transplants suggests host factors are key in developing this kidney disease.
Area of Science:
- Nephrology
- Pediatric Nephrology
- Transplantation Immunology
Background:
- Membranous glomerulonephritis (MGN) is a significant cause of nephrotic syndrome.
- Understanding de novo MGN in pediatric renal transplantation is crucial for long-term graft survival.
Observation:
- The incidence of de novo MGN in pediatric renal grafts remains approximately 9%.
- A previous cohort showed high graft loss and recurrence rates in patients with de novo MGN.
- In a cohort of second grafts, de novo MGN exclusively occurred in patients with prior MGN history.
Findings:
- De novo membranous glomerulonephritis (MGN) affects about 9% of pediatric kidney transplant recipients.
- Patients experiencing de novo MGN in their first graft have a high risk of recurrence in subsequent grafts.
- Recurrence of de novo MGN in second grafts was observed only in those with a history of MGN in the first graft.
Implications:
- The high recurrence rate of de novo MGN underscores the significant role of host-related factors in its pathogenesis.
- These findings highlight the need for further research into host immune responses in pediatric kidney transplant patients.
- Identifying and managing host factors may improve outcomes for children undergoing renal transplantation.