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News
Scientists at Scripps Research have discovered a naturally occurring molecule called erucamide that may help slow retinal degeneration. When erucamide levels drop as photoreceptors die, restoring it activates the retina's own immune defenses to stabilize tissue. The findings, published in Nature Neuroscience, could open a new path for treating diseases like macular degeneration and retinitis pigmentosa.
The retina doesn't just passively deteriorate — it actively fights back. Researchers at Scripps Research, UC San Diego, and the Lowy Medical Research Institute have identified a naturally occurring lipid molecule called erucamide that appears to coordinate the retina's own protective response to injury. Published in Nature Neuroscience (June 19, 2026), the study found that erucamide levels fall sharply as photoreceptors begin to die in diseases like diabetic retinopathy, age-related macular degeneration, and retinitis pigmentosa.
When scientists restored erucamide using porous silicon nanoparticles — needed because the molecule doesn't dissolve easily in water — it activated immune cells in the retina (CD11b⁺ myeloid cells) via a protein called TMEM19. These activated cells then released signals that helped stabilize both nerve cells and blood vessels, slowing certain aspects of degeneration without directly targeting photoreceptors.
Key Takeaways:
Why it matters: Many retinal diseases have limited treatment options. This discovery suggests that boosting a signal the retina already uses under stress — rather than introducing an entirely new therapy — could become a viable strategy for slowing vision loss.
