Age-severity relationships in families linked to FCD2 with retroillumination photography

Elyse J. McGlumphy, William S. Yeo, S. Amer Riazuddin, Amr Al-Saif, Jiangxia Wang, Allen O. Eghrari, Danielle N. Meadows, David G. Emmert, Elias Nicholas Katsanis, John D. Gottsch

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

PURPOSE. Fuchs corneal dystrophy (FCD) is a progressive disorder of the corneal endothelium and is pathologically defined by the presence of guttae, which are excrescences of the Descemet membrane. The present study was undertaken to investigate the age-severity relationship of the FCD2-linked disease phenotype using retroillumination photography and to compare it with the characteristics of FCD1. METHODS. Two large families with multiple affected members were recruited. Exclusion analyses of the known late-onset FCD loci were completed with closely spaced STR markers, whereas genes associated with early- and late-onset FCD were investigated by bidirectional sequencing. Haplotypes were constructed, and two-point LOD scores were calculated. To document age-severity relationships, retroillumination photographs were acquired from members of both families. RESULTS. Parametric linkage and haplotype analysis mapped both families to FCD2 with significant two-point LOD scores. A total of 70,249 guttae were counted in 14 persons from both families. A significant increase in guttae density in the inferotemporal region (P = 0.016) was observed, a pattern similarly observed in a family linked to FCD1. Similarly, FCD2-linked families display an exponential trend in severity with age, as was observed in a family linked to FCD1. Finally, comparison of FCD1 and FCD2 exponential models suggested that the FCD1 phenotype is significantly more severe (P = 0.01). CONCLUSIONS. A combination of genetic mapping and retroillumination photography was used to quantify the severity of the disease phenotype associated with FCD2 and to compare it to the disease characteristics of FCD1. These data suggest that this approach might have sufficient resolution to discriminate between discrete genetic FCD backgrounds, which will potentially aid in patient management.

Original languageEnglish (US)
Pages (from-to)6298-6302
Number of pages5
JournalInvestigative Ophthalmology and Visual Science
Volume51
Issue number12
DOIs
StatePublished - Dec 2010

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Fingerprint

Dive into the research topics of 'Age-severity relationships in families linked to FCD2 with retroillumination photography'. Together they form a unique fingerprint.

Cite this