Scientists at Duke University have developed a revolutionary method for growing specialized blood cells crucial for eye health, offering new hope for individuals at risk of blindness. This breakthrough involves coaxing adult cells into becoming retinal endothelial cells, which form the inner layer of blood vessels and maintain the eye's delicate blood barrier.
The degeneration of these cells can lead to conditions such as diabetic retinopathy, a primary cause of vision loss. Current research often relies on limited and expensive cell samples harvested from patients. The new technique, detailed in the journal Nature Biomedical Engineering, allows for the creation of these vital cells from induced pluripotent stem cells (iPSCs) on demand.
Induced pluripotent stem cells are mature adult cells that have been reprogrammed to a primitive state, enabling them to transform into any cell type. Researchers utilized a specific combination of growth factors to guide these stem cells into becoming the precise type of endothelial cells found in the eye. In laboratory settings, these lab-grown cells successfully formed networks mirroring those in the body.
Experiments conducted on mice with retinal diseases demonstrated that the injected lab-grown cells integrated into damaged tissues and helped restore function by forming robust blood vessels and a healthy barrier. Parker Esswein, a co-first author of the study, noted that the lab-grown cells showed promise for preventative treatments and are expected to be more accessible and cost-effective to obtain using their technique.
The ability to create these cells in a lab also provides a valuable tool for studying the mechanisms behind eye diseases. When exposed to conditions mimicking those that damage the natural blood barrier, the lab-grown cells degraded similarly, suggesting their utility in creating accurate human tissue models for research. Scientists are confident this will aid in understanding diseases and uncovering potential therapies. Future research will explore these lab-grown cells as a basis for new preventative treatments, potentially leading to significant advancements in saving millions from vision loss.