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Updated: May 17, 2026
07:11
Examination of Anatomical Features of Retinal Ganglion Cells Under N-methyl-D-aspartic Acid (NMDA)-induced Excitotoxicity
Published on: September 19, 2025
Direction-selective retinal ganglion cells arise from molecularly specified multipotential progenitors
Irina De la Huerta1, In-Jung Kim, P Emanuela Voinescu
1Center for Brain Science and Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA.
Summary
Retinal progenitors expressing cadherin 6 (cdh6) generate specific subtypes of retinal ganglion cells (RGCs). These progenitors also produce other retinal cell types, revealing distinct regulation of cell type and subtype specification.
Area of Science:
- Developmental biology
- Neuroscience
- Cell biology
Background:
- Retinal progenitors are multipotent, generating diverse retinal cell types including photoreceptors, interneurons, retinal ganglion cells (RGCs), and glia.
- RGCs comprise numerous subtypes (~25), but the developmental origins and commitment timing for these subtypes remain largely unknown.
Purpose of the Study:
- To investigate the developmental origin of specific retinal ganglion cell (RGC) subtypes, particularly those expressing cadherin 6 (cdh6) and responding to vertical motion.
- To understand how progenitor potential is restricted during retinal development to generate specific cell subtypes.
Main Methods:
- Utilized Cre recombinase-based lineage tracing in retinal progenitor cells.
- Tracked the progeny of progenitors expressing the cadherin 6 (cdh6) gene.
Main Results:
- Identified that cadherin 6 (cdh6)-expressing progenitors give rise to RGCs selective for vertical motion.
- Demonstrated that these cdh6-positive progenitors can generate all major retinal cell types but predominantly produce a single RGC subtype.
- Showed that cdh6-positive progenitors retain the capacity to generate multiple subtypes of amacrine and bipolar cells.
Conclusions:
- Cell type and subtype specification in the retina are differentially regulated during development.
- Suggests the existence of multipotent progenitors that are fate-restricted, contributing to the precise specification of retinal subtypes.
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