X-linked recessive atrophic macular degeneration from RPGR mutation

Radha Ayyagari, F. Yesim Demirci, Jiafan Liu, Eve L. Bingham, Heather Stringham, Laura E. Kakuk, Michael Boehnke, Michael B. Gorin, Julia E. Richards, Paul A. Sieving

Research output: Contribution to journalArticlepeer-review

96 Scopus citations

Abstract

We mapped a new X-linked recessive atrophic macular degeneration locus to Xp21.1-p11.4 and show allelic involvement of the geneRPGR, which normally causes severe peripheral retinal degeneration leading to global blindness. Ten affected males whom we examined had primarily macular atrophy causing progressive loss of visual acuity with minimal peripheral visual impairment. One additional male showed extensive macular degeneration plus peripheral loss of retinal pigment epithelium and choriocapillaries. Full-field electroretinograms (ERGs) showed normal cone and rod responses in some affected males despite advanced macular degeneration, emphasizing the dissociation of atrophic macular degeneration from generalized cone degenerations, including X-linked cone dystrophy (COD1). The RPGR gene (nonsense mutation G→T at open reading frame (ORF)15+1164 cosegregated with the disease and may create a donor splice site. Identification of an RPGR mutation in atrophic macular degeneration expands the phenotypic range associated with this gene and provides a new tool for the dissection of the relationship between clinically different retinal pathologies.

Original languageEnglish (US)
Pages (from-to)166-171
Number of pages6
JournalGenomics
Volume80
Issue number2
DOIs
StatePublished - 2002
Externally publishedYes

Keywords

  • Atrophic
  • CSNB1
  • Macular degeneration
  • Nonsense mutation
  • NYX
  • RP3
  • RPGR
  • Splice site
  • X-linked

ASJC Scopus subject areas

  • Genetics

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