Epidemiological profile of kidney transplant patients with lupus nephritis.

Introduction: Lupus nephritis (LN) affects up to 50% of patients with systemic lupus erythematosus (SLE) and may lead to kidney failure and require kidney transplantation (KT). Results compared to KT from other causes are controversial, and we aimed to assess the clinical course, complications, and survival of LN patients undergoing KT.

Methodology: Retrospective cohort of 99 KT due to LN from 1977 to 2023 at a single center, divided into two groups according to the immunosuppression period: G1 (before 2009) and G2 (from 2009 onwards). Clinical and demographic characteristics, as well as clinical evolution, were compared.

Results: Patients were predominantly white (65.9%), female (86.9%), in their first KT (83.8%). The median age was 20.0 (11.5-25.0) years at SLE diagnosis, and 30.0 (23.0-40.0) years at KT. Renal graft biopsy was indicated in 46% of patients, with rejection observed in 23%, and LN recurrence in 5%. When assessing the two distinct periods of standard immunosuppression, there was no difference in median glomerular filtration rate and proteinuria at 1 and 5 years, nor in 5-year survival. Throughout follow-up, 37.4% of patients lost their graft, and 13% died with a functioning graft. No graft loss was attributed to LN recurrence.

Conclusion: KT is a successful treatment for LN, with graft survival rates similar to those of transplants from other causes. LN recurrence was not associated with renal graft loss.