Risk model incorporating donor IL6 and IFNG genotype and gastrointestinal GVHD can discriminate patients at high risk of steroid refractory acute GVHD

Bone Marrow Transplantation
N AlamD D Kim

Abstract

Steroid refractory acute GVHD (SR aGVHD) is associated with high morbidity and mortality. This study attempted to generate a risk model for SR aGVHD using 259 single nucleotide polymorphisms (SNPs) in 53 genes of recipients and donors. A total of 268 patients with aGVHD who were treated with systemic steroids were included. Patients were randomly divided into training (n=180) and validation sets (n=88). Clinical risk factors were also evaluated. In the training set, 85 (47.2%) developed SR aGVHD. Gastrointestinal involvement (P<0.0001) and donor genotypes of IL6 (rs1800797; P=6.2 × 10(-4)) and IFNG (rs2069727; P=4.4 × 10(-4)) were significant risk factors. Scores were assigned to the above risk factors. Patients were divided into low (score 0, n=74) vs high risk (scores 1-3; n=106) in risk model. Higher incidence of SR aGVHD was noted in the high risk (61.3%) vs the low-risk group (27%; P<0.0001, odds ratio (OR) 4.28). Predictive effect of risk model was replicated in the validation set (P=0.0045, OR 3.74). This risk model was associated with response to therapy, overall and GVHD-specific survival and non-relapse mortality. Our study suggested that this risk model could identify patients at high risk of SR aGVHD with donor geno...Continue Reading

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Jul 31, 2020·Journal of Cellular and Molecular Medicine·Yanhui LiuJinhong Qi

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