title: A hypermorphic SP1-binding CD24 variant associates with risk and progression of multiple sclerosis.
abstract: A large number of risk alleles have been identified for multiple sclerosis (MS). However, how genetic variations may affect pathogenesis remains largely unknown for most risk alleles. Through direct sequencing of CD24 promoter region, we identified a cluster of 7 new single nucleotide polymorphisms in the CD24 promoter. A hypermorphic haplotype consisting of 3 SNPs was identified through association studies consisting of 935 control and 764 MS patients (P=0.001, odds ratio 1.3). The variant is also associated with more rapid progression of MS (P=0.016, log rank test). In cells that are heterozygous for the risk allele, chromatin immunoprecipitation revealed that risk allele specifically bind to a transcription factor SP1, which is selectively required for the hypermorphic promoter activity of the variant. In MS patients, the CD24 transcript levels associate with the SP1-binding variant in a dose-dependent manner (P=7x10(-4)). Our data revealed a potential role for SP1-mediated transcriptional regulation in MS pathogenesis.
authors.forename: Lizhong
authors.initials: L
authors.lastname: Wang
authors.forename: Runhua
authors.initials: R
authors.lastname: Liu
authors.forename: Dongling
authors.initials: D
authors.lastname: Li
authors.forename: Shili
authors.initials: S
authors.lastname: Lin
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Fang
authors.forename: Grant
authors.initials: G
authors.lastname: Backer
authors.forename: Mandy
authors.initials: M
authors.lastname: Kain
authors.forename: Kottil
authors.initials: K
authors.lastname: Rammoham
authors.forename: Pan
authors.initials: P
authors.lastname: Zheng
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu