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4. Chromosome 19q13 and multiple sclerosis susceptibility in Finland: a linkage and two-stage association study

Author

M Laaksonen, Leena Peltonen, Wikström J, Pentti J. Tienari, Tomi Pastinen, Satu Kuokkanen, Juhani Ruutiainen, Jorma Ilonen, Saara Finnilä, K Reunanen, Janna Saarela, Pekka Uimari, and Marja-Liisa Sumelahti

Subjects
Adult, Male, Multiple Sclerosis, Adolescent, Genetic Linkage, Immunology, Biology, Genetic linkage, Chromosome 19, medicine, Humans, Immunology and Allergy, Genetic Predisposition to Disease, Allele, Finland, Aged, HLA-DR Serological Subtypes, Genetic association, Family Health, Genetics, Linkage (software), Multiple sclerosis, Chromosome, HLA-DR Antigens, Middle Aged, medicine.disease, Neurology, Microsatellite, Female, Neurology (clinical), Chromosomes, Human, Pair 19, Microsatellite Repeats
Abstract

Several studies have previously provided some albeit weak evidence for linkage or association between chromosome 19q13 and multiple sclerosis (MS) susceptibility. We performed a two-stage association analysis with 19 markers spanning 7 Mb/5.5 cM of 19q13. In stage 1 analysis (135 MS families) allelic and haplotypic associations were found with markers within or close to the ApoE-ApoC subregion. These observations were taken as a hypothesis, which was tested in stage 2 in 125 families. However, none of the initial associations were replicated suggesting that they were most likely due to chance. Linkage analysis was performed in 27 Finnish multiplex families using 10 microsatellites spanning 23 Mb/24 cM of 19q13. DNA was available from 72 MS patients and 150 unaffected relatives. Parametric and non-parametric linkage analyses did not provide evidence for linkage when all families were tested. After stratifying the families according to HLA-DR15 there was weak evidence for linkage to the 19q13.1 subregion in DR15 negative families (LOD(max)=1.8). Taken together these results do not support a major role of chromosome 19q13.2-q13.3 in MS susceptibility among Finnish MS patients, whereas conclusions on the 19q13.1 subregion are less clear and this region requires further study.

Published
2002
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