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Purpose: The design of this study was to determine the most influential factor(s) on post-transplant immunological consequences, particularly with regard to the role of killer cell immunoglobulin-like receptors (KIRs) and their ligands (type Ⅰ human leukocyte antigen (HLA)) in unstable liver function. Methods: Retrospectively collected data from 319 recipients undergoing adult living donor liver transplantation (LDLT) using a right lobe graft between January 2002 and August 2008 were analyzed. Patients were categorized according to the serum alanine transaminase (ALT) pattern; stable ALT pattern was defined as ALT pattern during 3 months post-transplantation, except for initial 2 weeks post-transplantation, in which 2 times or less additional elevation(s) of serum alanine transaminase (ALT) (≥80 IU/L) were observed. When a serum ALT pattern showed fluctuating and/or unpredictable nature, it was defined as an unstable pattern. In addition, genetic information of KIRs and HLA-C allotypes received from 68 recipients and 59 donors was analyzed by way of polymerase chain reaction using sequence-specific primers (PCR-SSP) to determine the factor(s) influencing a serum ALT pattern. Results: Among 319 LDLT recipients included in this study, the actual incidences of AR and unstable ALT pattern were 13.4% (43/319) and 42.3% (135/319), respectively. Unstable ALT pattern correlated with poorer survival following LDLT than stable pattern (P0.000). Genetically, unstable ALT pattern was related to recipients carrying KIR2DL2()/KIR2DS2() combined with the heterogeneous HLA-C allotype (HLA-C1/C2), (relative risks 45.0, 95% confidence interval 2.160∼937.321; P=0.013). Conclusion: This study indicates that, when performing LDLT, pretransplant determination of recipient’s KIRs and HLA-C allotypes may be beneficial in coping with post-transplant immunological circumstances.

journal of the korean surgical society/journal of the korean surgical society/oe gwa hag'hoeji

Recipient's Killer Cell Immunoglobulin-like Receptor Genotype and Human Leukocyte Antigen C Ligand Influence the Clinical Outcome following Living Donor Liver Transplantation