alexa Genetic variations in the mycophenolate mofetil target enzyme are associated with acute GVHD risk after related and unrelated hematopoietic cell transplantation.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Metabolic Syndrome

Author(s): Cao W, Xiao H, Lai X, Luo Y, Shi J,

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Abstract Inosine monophosphate dehydrogenase (IMPDH) is the target enzyme of mycophenolate mofetil (MMF). Single nucleotide polymorphisms (SNPs) in the IMPDH1 gene are reportedly relevant to acute rejection in renal transplant patients receiving MMF. The objective of this study was to identify the impact of IMPDH1 gene polymorphisms on the outcomes of allogeneic hematopoietic stem cell transplantation (allo-HSCT). Four IMPDH1 gene SNPs (IVS7 +125 G>A, IVS8-106 G>A, exon15 1572 G>A, and 5' flanking intron-exon region C>T) were analyzed in 240 consecutive pairs of transplant recipients and their donors. The presence of the IMPDH1 IVS8-106 G/G genotype in recipients was associated with a significantly higher incidence of acute graft-versus-host disease (aGVHD) than other genotypes, in both unrelated and sibling transplantation cohorts (unrelated cohort: 83.3\% vs 63.9\%, P = .048; sibling cohort: 47.6\% vs 17.3\%, P = .008). Multivariate analysis confirmed that recipients with the IVS8-106 G/G genotype were at significantly higher risk of developing aGVHD (relative risk [RR] = 2.018, 95\% confidence interval [CI]: 1.354-3.009, P = .001) and grades II-IV aGVHD (RR = 2.232, 95\% CI: 1.352-3.685, P = .002). There was no association among IVS7 +125, exon15 1572, and 5' flanking intron-exon region genotypes and the risk of aGVHD. These results represent the first report of an association between IMPDH1 gene polymorphisms and the risk of aGVHD in allo-HSCT. Copyright © 2012 American Society for Blood and Marrow Transplantation. Published by Elsevier Inc. All rights reserved. This article was published in Biol Blood Marrow Transplant and referenced in Journal of Metabolic Syndrome

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