Abstract
Conflicting observations have been reported about the role of CTLA-4 gene polymorphisms in the clinical outcome of allogeneic hematopoietic stem cell transplantation (HSCT). We have investigated three polymorphisms of the CTLA-4 gene (−318C>T, +49A>G, CT60G>A) in 133 donor/recipient pairs who underwent HLA-matched sibling donor HSCT for hematological malignancies. We found no association of the clinical outcome of the HSCT with either recipient or donor −318C>T and CT60G>A polymorphisms. At variance, we found a significant association of donor +49A>G G/G genotype with longer overall survival (OS; log-rank test, P = 0.04), and the number of +49A>G G-alleles in the recipient with longer OS (P = 0.027), longer disease-free survival (P = 0.036) and reduced relapse rate (P = 0.042). However, only recipient +49A>G polymorphism was retained as independent prognostic factor in a multivariate analysis, suggesting that the expression of CTLA-4 on the cells of recipient may be relevant for the clinical outcome of HSCT.
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Acknowledgments
This work was supported in part by grants from Ministero dell'Istruzione, dell’Università e della Ricerca (MIUR-PRIN 2007, project WEYB3A) and from Regione Liguria.
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Rosario Notaro and Maria Pia Pistillo equally contributed to this work.
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Piccioli, P., Balbi, G., Serra, M. et al. CTLA-4 +49A>G polymorphism of recipients of HLA-matched sibling allogeneic stem cell transplantation is associated with survival and relapse incidence. Ann Hematol 89, 613–618 (2010). https://doi.org/10.1007/s00277-009-0885-5
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DOI: https://doi.org/10.1007/s00277-009-0885-5