Breakthrough could protect the vision cells that let you see faces and colors
A massive drug screen reveals both hidden dangers and exciting new ways to save the cells that let us see clearly.
- Date:
- April 2, 2026
- Source:
- Institute of Molecular and Clinical Ophthalmology Basel
- Summary:
- Scientists have taken a major step toward protecting the very cells that make sharp, colorful vision possible. By testing more than 2,700 compounds in thousands of lab-grown human retinal models, researchers uncovered several molecules that can shield cone photoreceptors—the cells responsible for reading, recognizing faces, and seeing color—from degeneration. They also identified a key protective mechanism involving casein kinase 1, offering a promising new target for treatment.
- Share:
A research team led by Botond Roska at the Institute of Molecular and Clinical Ophthalmology Basel (IOB), together with collaborators, has uncovered genetic pathways and compounds that can help protect cone photoreceptors. These cells are damaged in diseases such as age-related macular degeneration, a leading cause of vision loss.
Cone photoreceptors are concentrated in the macula and are essential for reading, recognizing faces, and seeing color. When these cells die, as they do in many inherited retinal disorders and macular degeneration, central vision is lost. Despite decades of scientific effort, no approved treatments can stop this process. This study, led by first authors Stefan Spirig, Alvaro Herrero Navarro and colleagues, aims to address this gap using a human-based experimental system.
Large-Scale Screening of Compounds in Human Retinal Models
To explore potential treatments, researchers tested more than 2,700 compounds across 20,000 human retinal organoids. The results revealed both promising leads and important safety concerns:
- Some classes of compounds damaged cone cells, highlighting potential risks
- Several molecules were found to protect cone photoreceptors from degeneration
- Blocking casein kinase 1 emerged as a key protective strategy
Scientists selectively labeled cone photoreceptors so they could track how these cells responded over time under controlled stress conditions that mimic disease. This setup made it possible to systematically evaluate compounds with known molecular targets.
Key Protective Mechanism Confirmed
The analysis revealed consistent patterns. Two kinase inhibitors repeatedly showed strong protective effects, helping cone cells survive for extended periods. These benefits were observed across different stress conditions and were also confirmed in a mouse model of retinal degeneration, suggesting the findings may apply more broadly.
In addition to identifying protective pathways, the team has released a detailed dataset covering all tested compounds, their molecular targets, and their effects on cone survival in human tissue. This resource is expected to support the development of therapies aimed at preserving central vision and help researchers assess potential retinal toxicity more systematically.
Moving Closer to Preventing Vision Loss
By combining retinal biology, organoid technology, and large-scale compound screening, this research provides a strong foundation for future treatments. It advances a long-standing goal in ophthalmology: protecting the cells that make vision possible.
Story Source:
Materials provided by Institute of Molecular and Clinical Ophthalmology Basel. Note: Content may be edited for style and length.
Journal Reference:
- Stefan E. Spirig, Álvaro Herrero-Navarro, Larissa Utz, Valeria J. Arteaga-Moreta, Zoltan Raics, Susana Posada-Céspedes, Stephanie Chreng, Olaf Galuba, Inga Galuba, Isabelle Claerr, Steffen Renner, Miklos Boldogkoi, Verónica Moreno-Juan, P. Timo Kleindienst, Adrienn Volak, Jannick Imbach, Svitlana Malysheva, Rebecca A. Siwicki, Vincent Hahaut, Yanyan Hou, Tiago M. Rodrigues, Simone Picelli, Marco Cattaneo, Josephine Jüttner, Cameron S. Cowan, Myriam Duckely, Daniel K. Baeschlin, Magdalena Renner, Vincent Unterreiner, Botond Roska. Cell-type-focused compound screen in human organoids reveals CK1 inhibition protects cone photoreceptors from death. Neuron, 2026; DOI: 10.1016/j.neuron.2026.02.024
Cite This Page: