PMID- 19775370 OWN - NLM STAT- MEDLINE DCOM- 20091222 LR - 20111117 IS - 1399-0039 (Electronic) IS - 0001-2815 (Linking) VI - 74 IP - 4 DP - 2009 Oct TI - HLA-G polymorphism influences the susceptibility to HCV infection in sickle cell disease patients. PG - 308-13 LID - 10.1111/j.1399-0039.2009.01331.x [doi] AB - Despite its well known monogenic etiopathogenesis, sickle cell disease (SCD) is characterized by a striking variability of clinical presentation. There is growing evidence that genetic factors may be involved in this variability. Human leukocyte antigen (HLA)-G is a non-classical HLA molecule which was shown to be expressed at sites of inflammation and in inflammatory diseases. Besides its large and highly polymorphic promoter region, the 3' UTR region seems also to play an important role on regulating HLA-G expression. We investigated the influence of the 14 pb (rs1704) and the +3142 (rs1063320) HLA-G polymorphisms in 93 SCD patients in order to evaluate its potential role on clinical parameters. Twenty-one patients presented an HCV infection. Among all SCD patients 16 (22.2%) were homozygous for the +3142C genotype, none of them hepatitis C (HCV) positive. Controlling for blood transfusions in the last year, the C allele represented a dose dependent protection effect for HCV infection (PR = 0.41; 95% CI: 0.24-0.71). The +3142C allele was also underrepresented among patients with history of respiratory-tract infections. Our results support a role of the +3142 polymorphism in the susceptibility to infections, in particular to HCV infection, and suggest a possible interference of the HLA-G molecule in the response to infections, among SCD patients. FAU - Cordero, E A A AU - Cordero EA AD - Post-Graduation Program in Medical Sciences, Hospital de Clinicas de Porto Alegre (HCPA), Porto Alegre, Brazil. FAU - Veit, T D AU - Veit TD FAU - da Silva, M A L AU - da Silva MA FAU - Jacques, S M C AU - Jacques SM FAU - Silla, L M D R AU - Silla LM FAU - Chies, J A B AU - Chies JA LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Tissue Antigens JT - Tissue antigens JID - 0331072 RN - 0 (HLA Antigens) RN - 0 (HLA-G Antigens) RN - 0 (Histocompatibility Antigens Class I) SB - IM EIN - Tissue Antigens. 2009 Nov;74(5):465 CIN - Tissue Antigens. 2010 Mar;75(3):199-200. PMID: 20030785 MH - Adult MH - Anemia, Sickle Cell/*genetics/immunology/*virology MH - Case-Control Studies MH - Disease Susceptibility MH - Female MH - HLA Antigens/*genetics MH - HLA-G Antigens MH - Hepacivirus/*genetics MH - Hepatitis C/complications/*genetics/immunology MH - Histocompatibility Antigens Class I/*genetics MH - Humans MH - Male MH - Polymorphism, Genetic/*genetics MH - Young Adult EDAT- 2009/09/25 06:00 MHDA- 2009/12/23 06:00 CRDT- 2009/09/25 06:00 PHST- 2009/09/25 06:00 [entrez] PHST- 2009/09/25 06:00 [pubmed] PHST- 2009/12/23 06:00 [medline] AID - TAN1331 [pii] AID - 10.1111/j.1399-0039.2009.01331.x [doi] PST - ppublish SO - Tissue Antigens. 2009 Oct;74(4):308-13. doi: 10.1111/j.1399-0039.2009.01331.x.