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Modifying effects of HLA-DRB1 allele interactions on age at onset of multiple sclerosis in Western Australia

Wu, J-S, Qiu, W., Castley, A., James, I., Mastaglia, F.L., Christiansen, F.T, Carroll, W.M, Joseph, J. and Kermode, A.G. (2010) Modifying effects of HLA-DRB1 allele interactions on age at onset of multiple sclerosis in Western Australia. Multiple Sclerosis, 16 (1). pp. 15-20.

Link to Published Version: http://dx.doi.org/10.1177/1352458509350312
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Abstract

The contribution of genetic factors to the age at onset in multiple sclerosis is poorly understood. Our objective was to investigate the disease modifying effects of HLA-DRB1 alleles and allele interactions on age at onset of multiple sclerosis. High-resolution four-digit HLA-DRB1 genotyping was performed in a cohort of 461 multiple sclerosis patients from the Perth Demyelinating Diseases Database. Carriage of the HLA-DRB1*1501 risk allele was not significantly associated with age at onset but HLA-DRB1*0801 was associated with a later onset of the disease. The HLA-DRB1*0401 allele was associated with a reduced age at onset when combined with DRB1*1501 but may delay age at onset when combined with DRB1*0801. These findings indicate that epistatic interactions at the HLA-DRB1 locus have significant modifying effects on age at onset of multiple sclerosis and demonstrate the value of high-resolution genotyping in detecting such associations.

Publication Type: Journal Article
Murdoch Affiliation: Centre for Clinical Immunology and Biomedical Statistics
Publisher: SAGE Publications
URI: http://researchrepository.murdoch.edu.au/id/eprint/6456
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