title: Lack of IFN-gamma 2/2 homozygous genotype independently of recipient age and intensity of conditioning regimen influences the risk of aGVHD manifestation after HLA-matched sibling haematopoietic stem cell transplantation.
abstract: A total of 110 patients (71 adults and 39 children) who received allogeneic haematopoietic stem cell transplantation from HLA-matched sibling donors were studied for the incidence of acute graft-versus-host disease (aGvHD) in relation to IFN-gamma gene microsatellite polymorphism. A strong tendency was observed towards the lower incidence of grades II-IV aGvHD in patients having an IFN-gamma 2/2 genotype as compared to the recipients with other IFN-gamma genotypes (0.12 vs 0.33, P=0.06). This relationship was independent of the intensity of conditioning regimen and diagnosis. IFN-gamma polymorphic features, together with other clinical and biological factors (patient's age, donor-recipient gender, diagnosis, conditioning regimen, transplant material and GvHD prophylaxis), were subjected to multivariate analysis for aGvHD manifestation in order to exclude indirect association of the IFN-gamma 2/2 genotype. In multivariate analysis, myeloablative therapy (OR=11.462, P=0.013), recipient age (OR=4.896, P=0.009) and lack of IFN-gamma 2/2 genotype (OR=4.311, P=0.048) were found to significantly contribute to the development of grade II-IV aGvHD, while type of GvHD prophylaxis showed less-strong influence (OR=2.963, P=0.066). Thus, it appeared that the IFN-gamma 2/2 genotype constituted an independent and protective factor associated with a decreased risk of grade II-IV aGvHD. However, this genotype was not found to be associated with the risk of cGvHD or survival.
authors.affiliation: L Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Mlynarczewska
authors.forename: B
authors.initials: B
authors.lastname: Wysoczanska
authors.forename: L
authors.initials: L
authors.lastname: Karabon
authors.forename: K
authors.initials: K
authors.lastname: Bogunia-Kubik
authors.forename: A
authors.initials: A
authors.lastname: Lange
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000740:Anemia / Q000628:therapy; D002648:Child; D005260:Female; D005838:Genotype; D006086:Graft vs Host Disease / Q000453:epidemiology / Q000235:genetics*; D019337:Hematologic Neoplasms / Q000628:therapy; D006650:Histocompatibility Testing; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000628:therapy; D007371:Interferon-gamma / Q000235:genetics*; D008297:Male; D015999:Multivariate Analysis; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D012189:Retrospective Studies; D035781:Siblings; D033581:Stem Cell Transplantation / Q000009:adverse effects*; D019172:Transplantation Conditioning
chemical_list: D007371:Interferon-gamma