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Transplantation. 2007 Dec 15;84(11):1527-33.

KIR/HLA ligand incompatibility in kidney transplantation.

Author information

1
Institute of Medical Immunology, Charité Universitätsmedizin Berlin, Campus Mitte, Berlin, Germany.

Abstract

BACKGROUND:

The polymorphic family of killer-cell immunoglobulin-like receptors (KIRs) consists of activating and inhibitory receptors expressed by natural killer (NK) cells and effector T cells that recognize human leukocyte antigen (HLA) class I ligands. It has been suggested that KIR/HLA incompatibility exerts beneficial effects in hematopoietic stem cell transplantation.

METHODS:

To elucidate whether certain receptor-ligand combinations between recipient KIR and donor HLA antigens lead to enhanced alloreactivity of NK cells associated with acute rejection (aRx) after kidney transplantation, we analyzed the entirety of matches/mismatches between KIR genes and known HLA ligands for aRx patients (n=105) compared to patients with stable renal function (n=119).

RESULTS:

Whereas HLA-C ligand incompatibility between donor and recipient has no influence on aRx, grafts derived from donors homozygous for HLA-C group 2 alleles seem to demonstrate a better outcome (P=0.052). Additionally, a higher number of inhibitory receptors in the recipient's genotype (P=0.042), a significant higher number of matches for the receptors KIR2DL2/DS2 (P=0.004), as well as a higher number of mismatches for KIR2DL3 (P=0.014) could be observed for patients with stable renal function.

CONCLUSION:

Our data illustrate that certain KIR/HLA class I ligand combinations between donor and recipient might influence graft short-term outcome after renal transplantation.

[Indexed for MEDLINE]

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