Impact of HLA matching on the outcome of simultaneous pancreaskidney transplantation
1 Divisions of Visceral and Transplantation Surgery, Geneva University Hospitals, Geneva, Switzerland and 2 Department of Kidney and Pancreas Transplantation and Organ Procurement, Cliniques Universitaires St Luc, Université Catholique de Louvain, Brussels, Belgium
Correspondence and offprint requests to: Dr Jacques Malaise, Department of Kidney and Pancreas Transplantation and Organ Procurement, Cliniques Universitaires St Luc, Université Catholique de Louvain, Avenue Hippocrate, 10/2207, B-1200 Brussels, Belgium. Email: jacques.malaise{at}chir.ucl.ac.be
Background. Simultaneous pancreaskidney (SPK) transplantation has become the therapy of choice for type 1 diabetic patients with end-stage renal disease. The current analysis examined the impact of human leukocyte antigen (HLA) matching on graft outcome following SPK transplantation. The study population was obtained from patients enrolled in the Euro-SPK 001 study.
Methods. The effect of HLA matching on graft function and survival was assessed in 180 SPK recipients in whom complete donorrecipient HLA data were available. A group of 45 patients with 03 HLA mismatches (MM) was compared with a group of 135 patients with 46 MM.
Results. There were no differences in 3-year kidney, pancreas or patient survival between the 03 and 46 MM groups. Biological parameters of kidney and pancreas graft function were similar in both groups. Significantly more patients with 03 MM (66%) were rejection-free at 3 years than was the case among those with 46 MM (41%; P = 0.003). The relative risk of acute rejection was 2.6 times higher among patients with 46 MM than among those with 03 MM.
Conclusions. There was no evidence that HLA matching was associated with improved kidney or pancreas survival. However, a higher rate of acute rejection was observed with poor HLA match, which may impact long-term survival.
Keywords: graft survival; HLA matching; kidneypancreas transplantation; multicentre study; prospective study; rejection