Genetic susceptibility to MS : a second stage analysis in Canadian MS families

• Published in: Neurogenetics Vol. 3; no. 3; pp. 145 - 151
• Main Authors: DYMENT, David A, WILLER, Cristen J, KASTRUKOFF, Lorne, OGER, Joel, METZ, Luanne, WARREN, Sharon, HADER, Walter, POWER, Cristopher, AUTY, Anthony, NATH, Avindra, NELSON, Robert, FREEDMAN, Mark, SCOTT, Beverly, BRUNET, Donald, PAULSETH, John E, RICE, George, O'CONNOR, Paul, DUQUETTE, Pierre, LAPIERRE, Yves, FRANCIS, Gordon, BOUCHARD, Jean-Pierre, MURRAY, T. John, BHAN, Virender, ARMSTRONG, Holly, MAXNER, Charles, PRYSE-PHILLIPS, William, STEFANELLI, Mark, SADOVNICK, A. Dessa, RISCH, Neil, EBERS, George C, LIGERS, Arturs, HILLERT, Jan, PATY, Donald W, HASHIMOTO, Stanley, DEVONSHIRE, Virginia, HOOGE, John
• Format: Journal Article
• Language: English
• Published: Berlin Springer 01.07.2001; Springer Nature B.V
• Subjects: Biological and medical sciences; Canada; Family; Female; Genetic Linkage; Genetic Markers; Genetic Predisposition to Disease; Genome, Human; Genomes; HLA-DR Antigens - genetics; HLA-DRB1 Chains; Humans; Linkage Disequilibrium; Male; Medical sciences; Medicin och hälsovetenskap; Multiple Sclerosis - genetics; Multiple sclerosis and variants. Guillain barré syndrome and other inflammatory polyneuropathies. Leukoencephalitis; Neurology; Nuclear Family; Software; Canada; North America; America; Human; Nervous system diseases; Multiple sclerosis; Linkage; Family study; Central nervous system disease; Risk factor; Genetics; Genotype; Genome; Locus; Inflammatory disease
• ISSN: 1364-6745; 1364-6753
• DOI: 10.1007/s100480100113

Four published genome screens have identified a number of markers with increased sharing in multiple sclerosis (MS) families, although none has reached statistical significance. One hundred and five markers previously identified as showing increased sharing in Canadian, British, Finnish, and American genome screens were genotyped in 219 sibling pairs ascertained from the database of the Canadian Collaborative Project on Genetic Susceptibility to MS (CCPGSMS). No markers examined met criteria for significant linkage. Markers located at 5p14 and 17q22 were analyzed in a total of 333 sibling pairs and attained mlod scores of 2.27 and 1.14, respectively. The known HLA Class II DRB1 association with MS was confirmed (P<0.0001). Significant transmission disequilibrium was also observed for D17S789 at 17q22 (P=0.0015). This study highlights the difficulty of searching for genes with only mild-to-moderate effects on susceptibility, although large effects of specific loci may still be present in individual families. Future progress in the genetics of this complex trait may be helped by (1) focussing on more ethnically homogeneous samples, (2) using an increased number of MS families, and (3) using transmission disequilibrium analysis in candidate regions rather than the affected relative pair linkage analysis.