Journal
JOURNAL OF HEPATOLOGY
Volume 53, Issue 1, Pages 67-72Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhep.2009.12.044
Keywords
Ischemia reperfusion injury; Preservation injury; Hepatitis C; Liver graft survival; Innate immunity; Toll-like receptor; Liver transplantation; Ischemia and reperfusion; Graft survival; Hepatitis C
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Funding
- [KO8 AI071038]
- [UO1 AI070107-01]
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Background & Aims: While studies in animal models have linked Toll-like receptor (TLR) 4 signaling to the pathophysiology of ischemia/reperfusion (IR) injury and liver fibrosis, the relevance of TLR4 activation after human liver transplantation is unknown. The TLR4 single nucleotide polymorphism (SNP) D299G is situated within the extracellular domain and diminishes receptor binding to danger-associated molecular patterns. Methods: We studied the influence of TLR4 D299G on IR injury and graft survival in 430 deceased donor LT recipients. Compared with livers expressing wild-type (WT) alleles, livers with a TLR4 loss-of-function allele were significantly more likely to have initial good graft function (IGGF) (OR 2.20, p = 0.01). In contrast, there was no effect of recipient TLR4 genotype on the rate of IGGF. Results: The effect of TLR4 D299G on long-term graft survival was analyzed based on hepatitis C virus (HCV) serostatus. In HCV infected recipients, multivariate Cox regression analysis demonstrated a significant association between the presence of recipient, but not donor TLR4 D299G and long-term graft failure (HR 2.48, CI 1.28-4.81 p = 0.007). There was no difference in graft survival between TLR4 mutant and WT recipients among non-HCV infected recipients. Conclusions: Collectively, these results demonstrate the differential effects of donor and recipient TLR4 signaling in human liver transplantation. Donor TLR4 contributed to sterile injury following cold preservation and the recipient TLR4 genotype was linked with poor allograft survival among HCV infected recipients. (C) 2010 European Association for the Study of the Liver. Published by Elsevier B.V. All rights reserved.
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