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Abstract #19599 Published in IGR 9-3
Genome-wide scan of exfoliation syndrome
Lemmelä S; Forsman E; Sistonen P; Eriksson A; Forsius H; Järvelä IInvestigative Ophthalmology and Visual Science 2007; 48: 4136-4142
See also comment(s) by Rand Allingham •
PURPOSE: Exfoliation syndrome (XFS) is an age-related ocular condition that is characterized by the accumulation of fibrillogranular extracellular material in intra- and extraocular tissues. The purpose of the present study was to identify the genetic basis of XFS in a large Finnish family. METHODS: A genome-wide scan with 1000 microsatellite markers was performed in an extended family from an island in the southwestern Finnish archipelago where XFS demonstrates an autosomal dominant mode of inheritance with incomplete penetrance. Two-point linkage analyses were performed with MLINK and multipoint linkage, using the Vitesse program. RESULTS: Five chromosomal regions with markers showing two-point LOD scores more than 1.5 was identified by using a dominant mode of inheritance for the XFS trait. The most promising locus was assigned to 18q12.1-21.33 with a maximum two-point LOD score of 3.45 and a multipoint LOD score of 4.2. Some evidence of linkage was obtained at chromosomes 2q, 17p, and 19q, which were suggested in earlier reports to be possible regions of linkage to primary open-angle glaucoma (POAG). CONCLUSIONS: The study presented herein offers a starting point to unravel the molecular background of XFS.
Dr. S. Lemmelä, Department of Medical Genetics, University of Helsinki, Helsinki, Finland
Classification:
9.4.4.1 Exfoliation syndrome (Part of: 9 Clinical forms of glaucomas > 9.4 Glaucomas associated with other ocular and systemic disorders > 9.4.4 Glaucomas associated with disorders of the lens)
3.4.1 Linkage studies (Part of: 3 Laboratory methods > 3.4 Molecular genetics)
