title: Cytotoxic T-lymphocyte antigen-4 (CTLA-4) gene polymorphism and susceptibility to non-Hodgkin's lymphoma.
abstract: The CTLA-4 molecule plays an important role in immune regulation by downregulating activation of T cells. Polymorphisms in the CTLA-4 gene have been shown to be associated to a number of autoimmune diseases including blood disorders. In this study, the intragenic polymorphisms of the CTLA-4 gene at position -318*C/T, +49*A/G, and the dinucleotide (AT)(n) repeat polymorphism in exon 3 were analyzed in patients with non-Hodgkin's lymphoma. Genotype and haplotype analysis showed that the exon 1+49*AA genotype was over-represented among patients with NHL (P = 0.002), whereas no difference was observed for the -318*C/T promoter and the (AT)(n) polymorphisms (P > 0.05). The data obtained indicate that the CTLA-4+49A/G polymorphism may have a role in genetic susceptibility to NHL.
authors.affiliation: Hematology Division and Bone Marrow Transplantation Unit, San Francesco Hospital, Nuoro, Italy. labematologia.nuoro@tiscali.it
authors.forename: Maria
authors.initials: M
authors.lastname: Monne
authors.forename: Giovanna
authors.initials: G
authors.lastname: Piras
authors.forename: Angelo
authors.initials: A
authors.lastname: Palmas
authors.forename: Luigi
authors.initials: L
authors.lastname: Arru
authors.forename: Marco
authors.initials: M
authors.lastname: Murineddu
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Latte
authors.forename: Annalisa
authors.initials: A
authors.lastname: Noli
authors.forename: Attilio
authors.initials: A
authors.lastname: Gabbas
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015703:Antigens, CD; D000943:Antigens, Differentiation / Q000235:genetics*; D060908:CTLA-4 Antigen; D005091:Exons / Q000235:genetics; D005260:Female; D020022:Genetic Predisposition to Disease; D006239:Haplotypes / Q000235:genetics; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000235:genetics*; D008297:Male; D018895:Microsatellite Repeats / Q000235:genetics; D008875:Middle Aged; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic / Q000235:genetics
chemical_list: D015703:Antigens, CD; D000943:Antigens, Differentiation; D060908:CTLA-4 Antigen; C556706:CTLA4 protein, human