Shaimaa A Fattah1, Maivel H Ghattas2, Samy M Saleh1, Dina M Abo-Elmatty1. 1. a Department of Biochemistry , Faculty of Pharmacy, Suez Canal University , Ismailia , Egypt and. 2. b Department of Medical Biochemistry , Faculty of Medicine, Port Said University , Port Said , Egypt.
Abstract
CONTEXT: Cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) is a CD28-family receptor expressed on T-cells which suppresses T cell proliferation. CTLA-4 -318C/T polymorphism is involved in regulation of CTLA-4 expression. OBJECTIVE: The study aimed to investigate the genetic association of CTLA-4 -318C/T polymorphism with rheumatoid arthritis (RA) and the activity and severity of the disease in the Egyptian population. METHODS: A single nucleotide polymorphism (rs5742909) in CTLA-4 was genotyped in 100 RA patients and 100 healthy controls using polymerase chain reaction-restriction fragment length polymorphism. Diagnostic tests were measured for RA patients. RESULTS: The frequency of T allele in RA patients was significantly higher than in the control subjects (p = 0.002). CT and TT genotypes had high C-reactive protein, erythrocyte sedimentation rate and disease activity score 28 while CC genotype had a high rheumatoid factor. CONCLUSION: A minor allele of CTLA-4 rs5742909 polymorphism was associated with RA and the activity but not the severity of the disease.
CONTEXT: Cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) is a CD28-family receptor expressed on T-cells which suppresses T cell proliferation. CTLA-4 -318C/T polymorphism is involved in regulation of CTLA-4 expression. OBJECTIVE: The study aimed to investigate the genetic association of CTLA-4 -318C/T polymorphism with rheumatoid arthritis (RA) and the activity and severity of the disease in the Egyptian population. METHODS: A single nucleotide polymorphism (rs5742909) in CTLA-4 was genotyped in 100 RApatients and 100 healthy controls using polymerase chain reaction-restriction fragment length polymorphism. Diagnostic tests were measured for RApatients. RESULTS: The frequency of T allele in RApatients was significantly higher than in the control subjects (p = 0.002). CT and TT genotypes had high C-reactive protein, erythrocyte sedimentation rate and disease activity score 28 while CC genotype had a high rheumatoid factor. CONCLUSION: A minor allele of CTLA-4rs5742909 polymorphism was associated with RA and the activity but not the severity of the disease.