Fine mapping of the Schnyder's crystalline corneal dystrophy locus.
Schnyder's crystalline corneal dystrophy (SCCD) is a rare autosomal dominant eye disease with a spectrum of clinical manifestations that may include bilateral corneal clouding, arcus lipoides, and anterior corneal crystalline cholesterol deposition. We have previously performed a genome-wide linkage analysis on two large Swede-Finn families and mapped the SCCD locus to a 16-cM interval between markers D1S2633 and D1S228 on chromosome 1p36. We have collected 11 additional families from Finland, Germany, Turkey, and USA to narrow the critical region for SCCD. Here, we have used haplotype analysis with densely spaced microsatellite markers in a total of 13 families to refine the candidate interval. A common disease haplotype was observed among the four Swede-Finn families indicating the presence of a founder effect. Recombination results from all 13 families refined the SCCD locus to 2.32 Mbp between markers D1S1160 and D1S1635. Within this interval, identity-by-state was present in all 13 families for two markers D1S244 and D1S3153, further refining the candidate region to 1.58 Mbp.
Theendakara
Veena
V
Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI 48201, USA.
Tromp
Gerard
G
Kuivaniemi
Helena
H
White
Peter S
PS
Panchal
Seema
S
Cox
Jennifer
J
Winters
R Scott
RS
Riebeling
Petra
P
Tost
Frank
F
Hoeltzenbein
Maria
M
Tervo
Timo M
TM
Henn
Wolfram
W
Denniger
Elke
E
Krause
Matthias
M
Koksal
Murat
M
Kargi
Sebnem
S
Ugurbas
Suat H
SH
Latvala
Terho
T
Shearman
Amanda M
AM
Weiss
Jayne S
JS
D002874:Chromosome Mapping; D002878:Chromosomes, Human, Pair 1 / Q000235:genetics*; D003317:Corneal Dystrophies, Hereditary / Q000235:genetics*; D018703:Founder Effect; D005838:Genotype; D006239:Haplotypes / Q000235:genetics*; D006801:Humans; D018895:Microsatellite Repeats; D010375:Pedigree