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Updated: Apr 4, 2026
13:47
Laser Capture Microdissection of Highly Pure Trabecular Meshwork from Mouse Eyes for Gene Expression Analysis
Published on: June 3, 2018
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Variant-to-gene mapping identifies ARHGEF12 as a primary open-angle glaucoma effector gene operating within retinal
Vrathasha Vrathasha1,2, Matthew C Pahl3,4, James A Pippin3,4
1Center for Genetics of Complex Disease, Department of Ophthalmology, University of Pennsylvania, Philadelphia, PA 19104, USA.
Biorxiv : the Preprint Server for Biology
|April 3, 2026
Summary
Primary open-angle glaucoma (POAG) research identified the ARHGEF12 gene as a key player. This study reveals its crucial role in retinal ganglion cells, offering new insights into POAG pathogenesis.
Area of Science:
- Genetics
- Ophthalmology
- Molecular Biology
Background:
- Primary open-angle glaucoma (POAG) is a major cause of irreversible blindness with a significant genetic component.
- Previous research identified 46 risk loci associated with POAG in African ancestry populations.
Purpose of the Study:
- To pinpoint causal variants and effector genes for POAG by analyzing gene expression and chromatin interactions.
- To functionally validate the role of candidate genes, specifically ARHGEF12, in ocular cell types relevant to POAG.
Main Methods:
- Analysis of gene expression, chromatin accessibility, and conformation in human trabecular meshwork cells (hTMCs) and induced pluripotent stem cell-derived retinal ganglion cells (hiPSC-RGCs).
- Selection and validation of candidate genes, including ARHGEF12, based on multi-cell type interactions and prior evidence.
- Functional assessment of ARHGEF12 in hiPSC-RGCs derived from a POAG patient homozygous for a risk allele.
Main Results:
- Identified 24 candidate genes in hTMCs and 56 in hiPSC-RGCs.
- ARHGEF12 was nominated by promoter interactions in both cell types and showed reduced expression, altered morphology, and disrupted neuronal activity in POAG patient-derived hiPSC-RGCs.
- This study establishes a framework for evaluating POAG risk variants.
Conclusions:
- ARHGEF12 plays a critical role in retinal ganglion cells, impacting their function and morphology in the context of POAG.
- The findings provide a functional basis for ARHGEF12's association with POAG and offer a method for assessing other risk variants.
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