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Int J Immunogenet. 2016 Dec;43(6):404-412. doi: 10.1111/iji.12295. Epub 2016 Nov 9.

Impact of genomic risk factors on survival after haematopoietic stem cell transplantation for patients with acute leukaemia.

Author information

1
Haematological Sciences, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK.
2
Department of Genetic Epidemiology, University Medical Center, Göttingen, Germany.
3
Northern Centre for Cancer Care, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK.
4
Department of Internal Medicine III, University of Regensburg, Regensburg, Germany.
5
Department of Cellular and Molecular Immunology, University Medical Center, Göttingen, Germany.
6
Department of Internal Medicine, Division of Haematology, Medical University of Graz, Graz, Austria.
7
Departement d'Immunologie, Université Paris Diderot, INSERM UMRS-940, AP-HP, Paris, France.
8
EUROCORD, University Research Institute, St Louis Hospital, Paris, France.
9
Department of Molecular Biology and Cell Pathology, Third Faculty of Medicine, Charles University Prague, Prague, Czech Republic.
10
Department of Pediatric Hematology and Oncology, Second Faculty of Medicine, Charles University Prague, Prague, Czech Republic.
11
Department I of Internal Medicine, University of Cologne, Cologne, Germany.

Abstract

The EBMT risk score is an established tool successfully used in the prognosis of survival post-HSCT and is applicable for a range of haematological disorders. One of its main advantages is that score generation involves summation of clinical parameters that are available pretransplant. However, the EBMT risk score is recognized as not being optimal. Previous analyses, involving patients with various diagnoses, have shown that non-HLA gene polymorphisms influence outcome after allogeneic HSCT. This study is novel as it focuses only on patients having acute leukaemia (N = 458) and attempts to demonstrate how non-HLA gene polymorphisms can be added to the EBMT risk score in a Cox regression model to improve prognostic ability for overall survival. The results of the study found that three genetic factors improved EBMT risk score. The presence of MAL (rs8177374) allele T in the patient, absence of glucocorticoid receptor haplotype (consisting of rs6198, rs33389 and rs33388) ACT in the patient and absence of heat-shock protein 70-hom (+2437) (rs2227956) allele C in the patient were associated with decreased survival time. When compared to the EBMT risk score, the scores combining EBMT risk score with the genetic factors had an improved correlation with clinical outcome and better separation of risk groups. A bootstrapping technique, involving repeated testing of a model using multiple validation sets, also revealed that the newly proposed model had improved predictive value when compared to the EBMT risk score alone. Results support the view that non-HLA polymorphisms could be useful for pretransplant clinical assessment and provide evidence that polymorphisms in the recipient genotype may influence incoming donor cells, suppressing the initiation of the graft versus leukaemia effect and reducing survival.

PMID:
27870355
DOI:
10.1111/iji.12295
[Indexed for MEDLINE]

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