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Laser Capture Microdissection of Highly Pure Trabecular Meshwork from Mouse Eyes for Gene Expression Analysis
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Genetics of primary open-angle glaucoma and its endophenotypes.

Yoichi Sakurada1, Fumihiko Mabuchi1, Kenji Kashiwagi1

  • 1Department of Ophthalmology, Faculty of Medicine, University of Yamanashi, Kofu, Japan.

Progress in Brain Research
|September 22, 2020
PubMed
Summary

Genetic risk scores (GRS) combine multiple variants to predict glaucoma risk. Higher GRS is linked to key glaucoma endophenotypes, enabling early detection and intervention for primary open-angle glaucoma (POAG).

Keywords:
EndophenotypesGenetic risk scoreGenome-wide association studiesIntraocular pressurePrimary open-angle glaucomaVertical cup-to-disc ratio

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Area of Science:

  • Ophthalmology
  • Genetics
  • Neuroscience

Background:

  • Glaucoma is a neurodegenerative disease causing vision loss due to retinal ganglion cell and optic nerve fiber damage.
  • Primary open-angle glaucoma (POAG) is the most common form, with over 100 associated genetic variants identified.
  • Genome-wide association studies (GWASs) link specific variants to POAG endophenotypes like vertical cup-to-disc ratio (VCDR) and intraocular pressure (IOP).

Purpose of the Study:

  • To explore the utility of a genetic risk score (GRS) for glaucoma.
  • To assess the association between GRS and glaucoma endophenotypes.
  • To evaluate the potential for early risk identification and intervention in POAG.

Main Methods:

  • Utilized data from genome-wide association studies (GWASs) identifying variants associated with POAG and its endophenotypes.
  • Constructed a genetic risk score (GRS) by aggregating the effects of multiple susceptibility variants.
  • Analyzed the correlation between the calculated GRS and endophenotypes such as VCDR and IOP.

Main Results:

  • Individual genetic variants have modest effects on glaucoma endophenotypes.
  • A higher GRS was significantly associated with increased VCDR, elevated IOP, and earlier age of diagnosis.
  • GRS effectively combines multiple genetic factors influencing POAG susceptibility.

Conclusions:

  • GRS is a valuable tool for quantifying genetic predisposition to POAG.
  • GRS can aid in identifying individuals at high risk before disease onset.
  • GRS facilitates prediction of visual prognosis and supports early therapeutic interventions.