Submitted December 3, 2002
Accepted December 2, 2003
Interleukin-10 and tumor necrosis factor alpha region haplotypes predict transplant mortality after unrelated donor stem cell transplantation
Leigh J Keen, Todd E DeFor, Jeffrey L Bidwell, Stella M Davies, Benjamin A Bradley, and Jill M Hows*
Department of Pathology and Microbiology, University of Bristol, Bristol, United Kingdom
Department of Bone Marrow Transplantation and Clinical Research, University of Minnesota, Minneapolis, MN, USA
Division of Transplantation Sciences, University of Bristol, Bristol, United Kingdom
* Corresponding author; email: jill.hows{at}bristol.ac.uk.
Cytokine gene polymorphisms correlate with outcome of HLA identical sibling stem cell transplantation (ID-SCT). This has not been extensively investigated in unrelated donor SCT (UD-SCT). We studied the association between tumor necrosis alpha (TNF-
) and interleukin-10 (IL-10) polymorphisms and transplant related mortality (TRM) at one year in 182 UD-SCT performed at a single center. Both TNFd4 allele and TNF-
1031C alleles were associated with TRM. Statistical analysis showed that both polymorphisms were part of a single haplotype associated with increased TRM at one year when present in recipient or donor, 55% (43-67%) compared with 21% (12-30%) when absent from both, (p = 0.003). Presence of the donor IL-10 R2-(IL-10G)-G-C-C haplotype was associated with increased risk of TRM, 61% (43-79%) compared with 34% (25-43%), p=0.01. In contrast the R3- (IL-10)-G-C-C haplotypes associated with reduced risk of TRM, 30% (19-41%) compared with 53% (40-66%), p=0.01. Results were confirmed by multifactorial methods.