The genetic contribution to recurrent autoimmune nephritis.

Glomerulonephritis is a significant cause of chronic kidney disease requiring renal replacement therapy. For patients receiving a transplant, it is known that specific primary pathologies such as membranous nephropathy, IgA nephropathy and FSGS have a high risk of recurrence in the transplant but the reasons for this are unknown and the ability to predict recurrence is poor. The recent discovery that primary MN is an autoimmune disease characterised by an autoantibody to phospholipase A2 receptor 1 and the identification of two genes, PLA2R1 and DQA1 which account for the genetic susceptibility to the disease, open up the potential to understand the mechanism of recurrent MN and therefore to design and manage therapy to prevent recurrence. Transplantation offers a unique ethical experimental context in which to explore the genetic contribution to recurrent autoimmune membranous nephropathy. By analysing the genetic changes in the kidney transplant in the context of anti-PLA2R status post transplant, it may be possible to link genetic markers, anti-PLAR regulation with recurrence and non-recurrence of disease. If successful, similar strategies may help unravel mechanisms of recurrent IgA nephropathy and FSGS.