Ophthalmology Science (Jun 2022)

The APOE E4 Allele Is Associated with Faster Rates of Neuroretinal Thinning in a Prospective Cohort Study of Suspect and Early Glaucoma

  • Sean Mullany, MD,
  • Henry Marshall, MD,
  • Santiago Diaz-Torres,
  • Ella C. Berry, MChD,
  • Joshua M. Schmidt, PhD,
  • Daniel Thomson, PhD,
  • Ayub Qassim, MBBS, PhD,
  • Minh-Son To, MD, PhD,
  • David Dimasi, PhD,
  • Abraham Kuot, PhD,
  • Lachlan S.W. Knight,
  • Georgina Hollitt, MBBS,
  • Antonia Kolovos, MD,
  • Angela Schulz, PhD,
  • Stewart Lake, MBChB,
  • Richard A. Mills, MBBS, PhD,
  • Ashish Agar, MBBS, PhD,
  • Anna Galanopoulos, MBBS,
  • John Landers, MBBS, PhD,
  • Paul Mitchell, MBBS, PhD,
  • Paul R. Healey, MBBS, PhD,
  • Stuart L. Graham, MBBS, PhD,
  • Alex W. Hewitt, MBBS, PhD,
  • Emmanuelle Souzeau, PhD,
  • Mark M. Hassall, MBBS, DPhil,
  • Sonja Klebe, MBBS, PhD,
  • Stuart MacGregor, PhD,
  • Puya Gharahkhani, PhD,
  • Robert J. Casson, MBBS, DPhil,
  • Owen M. Siggs, MD, DPhil,
  • Jamie E. Craig, MBBS, DPhil

Journal volume & issue
Vol. 2, no. 2
p. 100159

Abstract

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Purpose: To investigate the association between the apolipoprotein E (APOE) E4 dementia-risk allele and prospective longitudinal retinal thinning in a cohort study of suspect and early manifest glaucoma. Design: Retrospective analysis of prospective cohort data. Participants: This study included all available eyes from participants recruited to the Progression Risk of Glaucoma: Relevant SNPs [single nucleotide polymorphisms] with Significant Association (PROGRESSA) study with genotyping data from which APOE genotypes could be determined. Methods: Apolipoprotein E alleles and genotypes were determined in PROGRESSA, and their distributions were compared with an age-matched and ancestrally matched normative cohort, the Blue Mountains Eye Study. Structural parameters of neuroretinal atrophy measured using spectral-domain OCT were compared within the PROGRESSA cohort on the basis of APOE E4 allele status. Main Outcome Measures: Longitudinal rates of thinning in the macular ganglion cell–inner plexiform layer (mGCIPL) complex and the peripapillary retinal nerve fiber layer (pRNFL). Results: Rates of mGCIPL complex thinning were faster in participants harboring ≥1 copies of the APOE E4 allele (β = –0.13 μm/year; P ≤0.001). This finding was strongest in eyes affected by normal-tension glaucoma (NTG; β = –0.20 μm/year; P = 0.003). Apolipoprotein E E4 allele carriers were also more likely to be lost to follow-up (P = 0.01) and to demonstrate a thinner average mGCIPL complex (70.9 μm vs. 71.9 μm; P = 0.011) and pRNFL (77.6 μm vs. 79.2 μm; P = 0.045) after a minimum of 3 years of monitoring. Conclusions: The APOE E4 allele was associated with faster rates of mCGIPL complex thinning, particularly in eyes with NTG. These results suggest that the APOE E4 allele may be a risk factor for retinal ganglion cell degeneration in glaucoma.

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