title: CTLA-4 polymorphism and clinical outcome post allogeneic hematopoietic stem cell transplantation.
abstract: CTLA-4 inhibitory molecule plays an important role in regulating T cell activation. It is considered a crucial element in keeping the immune balance and has been implicated in cancer, autoimmunity and transplantation immunology. Inconsistent observations are reported regarding its association with hematopoietic stem cell transplantation (HSCT). Genotyping of CTLA-4 was performed in recipients and their HLA-matched donors for +49A/G and CT60 polymorphisms (80 and 94 pairs, respectively) using PCR-RFLP. No association was encountered between both polymorphisms in patients and donors and acute or chronic graft versus host disease. Significant association was observed between recipient +49A/G G allele and lower disease-free survival and overall survival compared to AA genotype (HR: 2.17, p = 0.03, 95% CI: 1.05-4.48 and HR: 2.54, p = 0.01, 95% CI: 1.16-5.54), respectively. Our results suggest that CTLA-4 genotyping may predict outcome in patients post HSCT. To validate our results, further studies on a larger cohort are needed.
authors: Bone Marrow Transplantation Laboratory Unit, National Cancer Institute, Cairo University, Cairo, Egypt. Electronic address: ghadamossallam@hotmail.com.
authors: Ghada I
authors: GI
authors: Mossallam
authors: Mohamed A
authors: MA
authors: Samra
mesh_terms: D000293:Adolescent; D000328:Adult; D000483:Alleles; D060908:CTLA-4 Antigen / Q000235:genetics*; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D005787:Gene Frequency; D056726:Genetic Association Studies; D005838:Genotype; D006086:Graft vs Host Disease / Q000209:etiology / Q000517:prevention & control; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D011379:Prognosis; D016019:Survival Analysis; D014019:Tissue Donors; D019172:Transplantation Conditioning; D014184:Transplantation, Homologous; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D060908:CTLA-4 Antigen