BACKGROUND: Approximately 25% of severe hemophilia A (HA) patients develop antibodies to factor VIII protein. PATIENTS: In the present case-controlled cohort study, 260 severely affected, mutation-type-matched HA patients were studied for association of human leukocyte antigen (HLA) class II molecules and polymorphisms in the genes encoding interleukin-10 (IL-10), tumor necrosis factor-alpha (TNF-alpha) and cytotoxic T-lymphocyte antigen-4 (CTLA-4) and development of inhibitors. RESULTS: Our results demonstrate a higher frequency of DRB1*15 and DQB1*0602 alleles as well as of the haplotype DRB1*15/DQB1*0602 in inhibitor patients [odds ratio (OR) 1.9; P < 0.05]. In TNF-alp[ha, the A allele of the 308G>A polymorphism was found with higher frequency in the inhibitor cohort (0.22 vs. 0.13, OR 1.80). This finding was more pronounced for the homozygous A/A genotype (OR 4.7). For IL-10, the 1082G allele was observed more frequently in patients with inhibitors (0.55 vs. 0.43; P = 0.008). The functional cytokine phenotype was determined for the first time, on the basis of the genetic background, and this showed that 12% of patients with inhibitors were high-TNF-alpha/high-IL-10 producers, as compared with 3% of non-inhibitor patients (OR 4.4). A trend for a lower frequency of the A allele of the CT60 polymorphism in CTLA-4 was found in inhibitor patients (0.42 vs. 0.50). CONCLUSIONS: In conclusion, the reported data clearly highlighted the participation of HLA molecules in inhibitor formation in a large cohort of patients. The higher frequencies of the 308G>A polymorphism in TNF-alpha and 1082A>G in IL-10 in inhibitor patients confirmed the earlier published data. The CT60 single-nucleotide polymorphism in CTLA-4 is of apparently less importance.
BACKGROUND: Approximately 25% of severe hemophilia A (HA) patients develop antibodies to factor VIII protein. PATIENTS: In the present case-controlled cohort study, 260 severely affected, mutation-type-matched HA patients were studied for association of human leukocyte antigen (HLA) class II molecules and polymorphisms in the genes encoding interleukin-10 (IL-10), tumor necrosis factor-alpha (TNF-alpha) and cytotoxic T-lymphocyte antigen-4 (CTLA-4) and development of inhibitors. RESULTS: Our results demonstrate a higher frequency of DRB1*15 and DQB1*0602 alleles as well as of the haplotype DRB1*15/DQB1*0602 in inhibitor patients [odds ratio (OR) 1.9; P < 0.05]. In TNF-alp[ha, the A allele of the 308G>A polymorphism was found with higher frequency in the inhibitor cohort (0.22 vs. 0.13, OR 1.80). This finding was more pronounced for the homozygous A/A genotype (OR 4.7). For IL-10, the 1082G allele was observed more frequently in patients with inhibitors (0.55 vs. 0.43; P = 0.008). The functional cytokine phenotype was determined for the first time, on the basis of the genetic background, and this showed that 12% of patients with inhibitors were high-TNF-alpha/high-IL-10 producers, as compared with 3% of non-inhibitor patients (OR 4.4). A trend for a lower frequency of the A allele of the CT60 polymorphism in CTLA-4 was found in inhibitor patients (0.42 vs. 0.50). CONCLUSIONS: In conclusion, the reported data clearly highlighted the participation of HLA molecules in inhibitor formation in a large cohort of patients. The higher frequencies of the 308G>A polymorphism in TNF-alpha and 1082A>G in IL-10 in inhibitor patients confirmed the earlier published data. The CT60 single-nucleotide polymorphism in CTLA-4 is of apparently less importance.
Authors: Nicoletta Sorvillo; Robin B Hartholt; Esther Bloem; Magdalena Sedek; Anja ten Brinke; Carmen van der Zwaan; Floris P van Alphen; Alexander B Meijer; Jan Voorberg Journal: Haematologica Date: 2015-12-03 Impact factor: 9.941
Authors: Katharina N Steinitz; Pauline M van Helden; Brigitte Binder; David C Wraith; Sabine Unterthurner; Corinna Hermann; Maria Schuster; Rafi U Ahmad; Markus Weiller; Christian Lubich; Maurus de la Rosa; Hans Peter Schwarz; Birgit M Reipert Journal: Blood Date: 2012-03-06 Impact factor: 22.113
Authors: Y Dargaud; A Pavlova; S Lacroix-Desmazes; K Fischer; M Soucie; S Claeyssens; D W Scott; R d'Oiron; G Lavigne-Lissalde; G Kenet; C Escuriola Ettingshausen; A Borel-Derlon; T Lambert; G Pasta; C Négrier Journal: Haemophilia Date: 2016-01 Impact factor: 4.287
Authors: Jan Astermark; Sharyne M Donfield; Edward D Gomperts; John Schwarz; Erika D Menius; Anna Pavlova; Johannes Oldenburg; Bailey Kessing; Donna M DiMichele; Amy D Shapiro; Cheryl A Winkler; Erik Berntorp Journal: Blood Date: 2012-12-06 Impact factor: 22.113