Lansbury, Peter T

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Genetic linkage analysis of familial amyotrophic lateral sclerosis using human chromosome 21 microsatellite DNA markers.

D R Rosen; P Sapp; J O'Regan; D McKenna-Yasek; K S Schlumpf; J L Haines; J F Gusella; H R Horvitz; R H Brown (Profiled Authors: Haines, Jonathan L; Gusella, James F)

Day Neuromuscular Research Laboratory, Massachusetts General Hospital, Charlestown 02129-2060.
American journal of medical genetics 1994;51(1):61-9.

Amyotrophic lateral sclerosis (ALS: Lou Gehrig's Disease) is a lethal neurodegenerative disease of upper and lower motorneurons in the brain and spinal cord. We previously reported linkage of a gene for familial ALS (FALS) to human chromosome 21 using 4 restriction fragment length polymorphism DNA markers [Siddique et al.: N Engl J Med 324:1381-1384, 1991] and identified disease-associated mutations in the superoxide dismutase (SOD)-1 gene in some ALS families [Rosen et al.: Nature 362:59-62, 1993]. We report here the genetic linkage data that led us to examine the SOD-1 gene for mutations. We also report a new microsatellite DNA marker for D21S63, derived from the cosmid PW517 [VanKeuren et al.: Am J Hum Genet 38:793-804, 1986]. Ten microsatellite DNA markers, including the new marker D21S63, were used to reinvestigate linkage of FALS to chromosome 21. Genetic linkage analysis performed with 13 ALS families for these 10 DNA markers confirmed the presence of a FALS gene on chromosome 21. The highest total 2-point LOD score for all families was 4.33, obtained at a distance of 10 cM from the marker D21S223. For 5 ALS families linked to chromosome 21, a peak 2-point LOD score of 5.94 was obtained at the DNA marker D21S223. A multipoint score of 6.50 was obtained with the markers D21S213, D21S223, D21S167, and FALS for 5 chromosome 21-linked ALS families. The haplotypes of these families for the 10 DNA markers revealed recombination events that further refined the location of the FALS gene to a segment of approximately 5 megabases (Mb) between D21S213 and D21S219.(ABSTRACT TRUNCATED AT 250 WORDS)

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