The CTLA-4 gene is associated with multiple sclerosis - PubMed (original) (raw)
The CTLA-4 gene is associated with multiple sclerosis
A Ligers et al. J Neuroimmunol. 1999.
Abstract
We have investigated whether three intragenic polymorphisms of the CTLA-4 gene, a C/T base exchange in the promoter (p.-318), an A/G substitution in exon 1 (p.49) and a dinucleotide repeat polymorphism in exon 4 (p.642), were associated with genetic susceptibility to multiple sclerosis (MS). We observed a significant association (p < 0.05) for homozygosity for the G49 allele in a case-control analysis of 378 MS patients and 237 controls, and a transmission disequilibrium (p < 0.02) for the G49 allele in 31 MS families. This was further corroborated by evidence for linkage by the affected pedigree member (APM) analysis (p < 0.0002) and a transmission distortion (p < 0.05) of the exon 4(642) polymorphism. Sequencing of the promoter, the first and second exons and the parts of the first intron revealed no further polymorphisms. Our results suggest that a dysregulation of CTLA-4-driven downregulation of T-cell activation could be involved in the pathogenesis of MS.
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