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  • Title: NOD2/CARD15 variants are not a risk factor for clinical outcome after nonmyeloablative allogeneic stem cell transplantation.
    Author: van der Straaten HM, Paquay MM, Tilanus MG, van Geloven N, Verdonck LF, Huisman C.
    Journal: Biol Blood Marrow Transplant; 2011 Aug; 17(8):1231-6. PubMed ID: 21215810.
    Abstract:
    Single nucleotide polymorphisms (SNPs) in the innate immunity receptor NOD2/CARD15 have been demonstrated to modulate the outcome of allogeneic hematopoietic stem cell transplantation (SCT). The effect of NOD2/CARD15 polymorphism is reported to be associated with type of donor (sibling or matched unrelated donor) as well as type of conditioning regimen. We reviewed NOD2/CARD15 SNPs in all donor/recipient pairs of 192 consecutive patients who received nonmyeloablative allogeneic SCT at our institution between 2002 and 2006. All patients were treated with fludarabine 30 mg/m(2)/day for 3 days followed by 200 cGy total-body irradiation (TBI) (n = 154) or TBI alone (n = 38) and received grafts from HLA-matched related (n = 132) or unrelated (n = 61) donors. NOD2/CARD15 polymorphisms were observed in 36 of 192 (19%) patients and in 35 of 192 (18%) donors. The incidences of acute and chronic graft-versus-host disease (aGVHD, cGVHD) were 39% and 49%, respectively, in patients with NOD2/CARD15 variants versus 51% and 61% in patients with wild type. The relapse rate at 3 years was 38% in patients with variants and 36% in patients with wild type. The incidence of transplant-related mortality was 22% for patients with variants and 21% for patients with wild type. Overall survival (OS) at 3 years was 56% in patients with variants and 64% in patients with wild-type NOD2/CARD15. There was no significant impact of NOD2/CARD15 mutations on clinical outcome (all P > .05, Kaplan-Meier and Fine and Gray's tests). These data indicate that mutations in the NOD2/CARD15 gene are not a risk factor for clinical outcome in nonmyeloablative allogeneic SCT. Therefore, screening for NOD2/CARD15 polymorphisms in patients or donors does not have additional value in patients undergoing nonmyeloablative SCT.
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