Pseudo-vitelliform macular detachment and cuticular drusen: Exclusion of 6 candidate genes

Irene A. Barbazetto, Nicolas A. Yannuzzi, Christina M. Klais, Joanna E. Merriam, Jana Zernant, Enrico Peiretti, Lawrence A. Yannuzzi, Rando Allikmets

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Purpose: The etiology and genetic cause of pseudo-vitelliform macular detachment with cuticular drusen (PVMD/CD) are unknown; nor is it clear if this phenotype represents a separate disease entity, or is a sub-phenotype of disorders with overlapping clinical presentation. To answer this question, we screened a cohort of patients affected with PVMD/CD for variation in six plausible candidate genes (ABCA4, VMD2, TIMP-3, peripherin/RDS, fibulin 5 (FIBL5) and complement factor H (CFH)) associated with diseases of overlapping phenotypes. Methods: Twenty-eight patients, diagnosed with pseudo-vitelliform macular detachment and cuticular drusen, were evaluated by clinical examination, fundus photography, fluorescein angiography and autofluorescence imaging. DNA from all study subjects were screened for variants in the ABCA4, VMD2, TIMP-3, peripherin/RDS, FIBL5 and CFH genes by a combination of DHPLC, array screening and direct sequencing. Results: All patients presented with cuticular drusen; pseudo-vitelliform detachment was seen in 21 cases, while atrophic changes following regression of the detachment were seen in the remaining 7 subjects. Visual acuity ranged from 20/20 to CF. The screening revealed an I32V mutation in peripherin/RDS in one patient and 2ABCA4 variants, T897I and G1961E, in 2 more patients. No amino acid-altering variants were detected in VMD2, TIMP-3, and FIBL5 genes. The frequency of the CFH Y402H variant in this cohort corresponded to that detected in the general population. Conclusions: Screening of 6 candidate genes detected possibly disease-associated mutations in only 3/28 (10.7%) of patients presenting with PVMD/CD, eliminating these genes as causal for this phenotype.

Original languageEnglish (US)
Pages (from-to)192-197
Number of pages6
JournalOphthalmic Genetics
Volume28
Issue number4
DOIs
StatePublished - Oct 2007
Externally publishedYes

Keywords

  • Association
  • Candidate gene
  • Cuticular drusen
  • Pseudovitelliform

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Ophthalmology
  • Genetics(clinical)

Fingerprint

Dive into the research topics of 'Pseudo-vitelliform macular detachment and cuticular drusen: Exclusion of 6 candidate genes'. Together they form a unique fingerprint.

Cite this