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2006:
Stambolian Dwight; Ibay Grace; Reider Lauren; Dana Debra; Moy Chris; Schlifka Melissa; Holmes Taura N; Ciner Elise; Bailey-Wilson Joan E
Genome-wide scan of additional Jewish families confirms linkage of a myopia susceptibility locus to chromosome 22q12.
Molecular vision 2006;
12(
):.
PURPOSE: A genome-wide scan was previously reported for myopia in Ashkenazi Jews. In order to confirm the previous linkage peaks, a collection of DNA samples from 19 new Ashkenazi Jewish families were tested for linkage in a genome wide scan. METHODS: Families were ascertained from an Orthodox Ashkenazi Jewish community through mailings. Myopia was defined as equal to or greater than -1 diopter in both meridians in both eyes. The genome wide scan used markers from a modified Cooperative Human Linkage Center version 9 (402 markers). Parametric two-point linkage was calculated with FASTLINK while multipoint linkage was calculated with GENEHUNTER. RESULTS: The results for the 19 families demonstrated several regions of suggestive linkage on chromosomes 7, 1, 17, and 22. A combined analysis of the 19 families and 44 previously reported families demonstrated an increase in the LOD score to 4.73 for the chromosome 22 locus. CONCLUSIONS: Multiple chromosomal regions have exhibited some evidence of linkage to a myopia susceptibility gene in this Ashkenazi Jewish population. The strongest evidence of linkage to such a susceptibility gene in these data is on chromosome 22.
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