Researchers have successfully grown specialized retinal endothelial cells from induced pluripotent stem cells (iPSCs) for the first time, creating a scalable source that can model diabetic retinopathy and regenerate damaged retinal blood vessels. When injected into mice, these lab-grown cells integrated into the host tissue, rebuilt blood vessels, and restored retinal function.
The Research
A team led by Dr. Sharon Gerecht and Parker Esswein at Duke University developed a customized growth-factor cocktail that coaxed standard iPSCs into becoming retinal endothelial cells—the rare cells that form the inner lining of blood vessels in the retina. Published June 30 in Nature Biomedical Engineering and funded by the National Eye Institute and NASA, the study demonstrated two key achievements. First, in lab dishes, the cells assembled into functional vessel networks that, when exposed to high glucose and low oxygen, broke down exactly as diabetic retinopathy does in patients—creating a realistic model for drug testing. Second, when injected into mouse models with weak retinal vessels, the iPSC-derived cells navigated to damage sites, incorporated into the existing matrix, and built robust new vessels with fortified barriers, preventing vision loss. Duke University has a patent pending on both the cell therapy and the drug-testing platform.
Why It Matters
Retinal vascular diseases like diabetic retinopathy affect millions and are a leading cause of blindness. The retina is part of the central nervous system, protected by a highly selective blood-retina barrier made of these specialized endothelial cells. Because these cells don't exist elsewhere in the body, sourcing them has been a bottleneck. This breakthrough provides an unlimited, standardized supply for research and potential therapies. For your own cognition, understanding how stem cells can rebuild neural tissue highlights the brain's own regenerative potential—and the importance of protecting your blood vessels through lifestyle.
What You Can Do
While this therapy is still preclinical, you can support your retinal health now: manage blood sugar and blood pressure through diet and exercise. High glucose and hypoxia damage retinal vessels—keeping them in check reduces risk. Also, consider regular eye exams to catch early signs.
Source: Neuroscience News
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