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1.
  • Beecham, Ashley H., et al. (författare)
  • Analysis of immune-related loci identifies 48 new susceptibility variants for multiple sclerosis.
  • 2013
  • Ingår i: Nature genetics. - 1546-1718. ; 45:11, s. 1353-60
  • Tidskriftsartikel (refereegranskat)abstract
    • Using the ImmunoChip custom genotyping array, we analyzed 14,498 subjects with multiple sclerosis and 24,091 healthy controls for 161,311 autosomal variants and identified 135 potentially associated regions (P < 1.0 x 10(-4)). In a replication phase, we combined these data with previous genome-wide association study (GWAS) data from an independent 14,802 subjects with multiple sclerosis and 26,703 healthy controls. In these 80,094 individuals of European ancestry, we identified 48 new susceptibility variants (P < 5.0 x 10(-8)), 3 of which we found after conditioning on previously identified variants. Thus, there are now 110 established multiple sclerosis risk variants at 103 discrete loci outside of the major histocompatibility complex. With high-resolution Bayesian fine mapping, we identified five regions where one variant accounted for more than 50% of the posterior probability of association. This study enhances the catalog of multiple sclerosis risk variants and illustrates the value of fine mapping in the resolution of GWAS signals.
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2.
  • Adam, A, et al. (författare)
  • Abstracts from Hydrocephalus 2016.
  • 2017
  • Ingår i: Fluids and Barriers of the CNS. - 2045-8118 .- 2045-8118. ; 14:Suppl 1
  • Tidskriftsartikel (refereegranskat)
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  • Engdahl, Elin, et al. (författare)
  • Increased Serological Response Against Human Herpesvirus 6A Is Associated With Risk for Multiple Sclerosis
  • 2019
  • Ingår i: Frontiers in Immunology. - Frontiers Media S. A.. - 1664-3224. ; 10
  • Tidskriftsartikel (refereegranskat)abstract
    • Human herpesvirus (HHV)-6A or HHV-6B involvement in multiple sclerosis (MS) etiology has remained controversial mainly due to the lack of serological methods that can distinguish the two viruses. A novel multiplex serological assay measuring IgG reactivity against the immediate-early protein 1 from HHV-6A (IE1A) and HHV-6B (IE1B) was used in a MS cohort (8,742 persons with MS and 7,215 matched controls), and a pre-MS cohort (478 individuals and 476 matched controls) to investigate this further. The IgG response against IE1A was positively associated with MS (OR = 1.55, p = 9 × 10−22), and increased risk of future MS (OR = 2.22, p = 2 × 10−5). An interaction was observed between IE1A and Epstein-Barr virus (EBV) antibody responses for MS risk (attributable proportion = 0.24, p = 6 × 10−6). In contrast, the IgG response against IE1B was negatively associated with MS (OR = 0.74, p = 6 × 10−11). The association did not differ between MS subtypes or vary with severity of disease. The genetic control of HHV-6A/B antibody responses were located to the Human Leukocyte Antigen (HLA) region and the strongest association for IE1A was the DRB1*13:01-DQA1*01:03-DQB1*06:03 haplotype while the main association for IE1B was DRB1*13:02-DQA1*01:02-DQB1*06:04. In conclusion a role for HHV-6A in MS etiology is supported by an increased serological response against HHV-6A IE1 protein, an interaction with EBV, and an association to HLA genes.
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  • KOCKUM, I, et al. (författare)
  • Population analysis of protection by HLA-DR and DQ genes from insulin-dependent diabetes mellitus in Swedish children with insulin-dependent diabetes and controls
  • 1995
  • Ingår i: European journal of immunogenetics : official journal of the British Society for Histocompatibility and Immunogenetics. - 0960-7420. ; 22:6, s. 443-465
  • Tidskriftsartikel (refereegranskat)abstract
    • A negative association between insulin‐dependent diabetes mellitus (IDDM) and HLA‐DR, DQA1 or DQB1 was found in a large population‐based investigation of childhood‐onset patients (more than 420 patients) and controls (more than 340 controls) from Sweden. The relative risk was decreased for several haplotypes that were negatively associated with IDDM: DR15‐DQA1*0102‐DQB1*0602, DR7‐DQA1*0201‐DQB1*0303, DR14‐DQA1*0101‐DQB1*0503, DRI1‐DQAI*0501‐DQB1*0301, DR13‐DQA1*0103‐DQB1*0603 and DR4‐DQA1*0301‐DQB1*0301. In a relative predispositional effect (RPE) analysis, however, only the DR15‐DQA1*0102‐DQB1*0602 haplotype was significantly decreased, which suggests that the major protective effect for IDDM is carried by this haplotype. This was supported by the observation that all genotypes which were negatively associated with IDDM, except DR7/13, included at least one allele from the DR15‐DQA1*0102‐DQB1*0602 haplotype. Relative predispositional effect (RPE) analysis of genotypes showed further that the DR15‐DQA1*0102‐DQB1*0602 haplotype was also negatively associated with IDDM when combined with any other haplotype, whether negatively or positively associated with IDDM. This supports previous suggestions that DR15‐DQA1*0102‐DQB1*0602 acts dominantly. However, both the stratification and the predispositional allele test failed to distinguish the negative association between IDDM and DR15 from that of DQBT0602. On the other hand, these tests indicated that DQA1*0102 was not likely to explain the negative association between IDDM and the DR15‐DQA1*0102‐DQB1*0602 haplotype. We conclude that the
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