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Linkage to 10q22 for maximum intraocular pressure and 1p32 for maximum cup-to-disc ratio in an extended primary open-angle glaucoma pedigree


Charlesworth, JC; Dyer, TD; Stankovich, JM; Blangero, J; Mackey, DA; Craig, JE; Green, CM; Foote, SJ; Baird, PN; Sale, MM
2005-10
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
Journal Article
46
10
3723-3729
PURPOSE. The purpose of this study was to identify genetic contributions to primary open-angle glaucoma (POAG) through investigations of two quantitative components of the POAG phenotype. METHODS. Genome-wide multipoint variance-components linkage analyses of maximum recorded intraocular pressure (IOP) and maximum vertical cup-to-disc ratio were conducted on data from a single, large Australian POAG pedigree that has been found to segregate the myocilin Q368X mutation in some individuals. RESULTS. Multipoint linkage analysis of maximum recorded IOP produced a peak LOD score of 3.3 (P = 0.00015) near marker D10S537 on 10q22, whereas the maximum cup-to-disc ratio produced a peak LOD score of 2.3 (P = 0.00056) near markers D1S197 to D1S220 on 1p32. Inclusion of the myocilin Q368X mutation as a covariate provided evidence of an interaction between this mutation and the IOP and cup-to-disc ratio loci. CONCLUSIONS. Significant linkage has been identified for maximum IOP and suggestive linkage for vertical cup-to-disc ratio. Identification of genes contributing to the variance of these traits will enhance understanding of the pathophysiology of POAG as a whole.
ASSOC RESEARCH VISION OPHTHALMOLOGY INC
QUANTITATIVE TRAIT LOCUS; SERUM LEPTIN LEVELS; GENOME-WIDE SCAN; BEAVER-DAM EYE; GENETIC-LINKAGE; CORNEAL THICKNESS; CHROMOSOME 3Q; POPULATION; MUTATIONS; MYOCILIN
10.1167/iovs.05-0312
Refer to copyright notice on published article.

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Creation Date 2005-10-01 12:00:00