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Lab-Grown Retina Cells Repair Monkeys' Sight
Retinitis pigmentosa (RP) is a genetic eye condition that results in damage to the retina. It has no cure; over time, a person with RP loses much or all of their vision.
But scientists have gotten one step closer to finding a better treatment. Researchers at the RIKEN Institute in Japan have now succeeded in growing retinal tissue and transplanting that tissue into the retinas of rhesus monkeys with RP. Three weeks after the treatment, visual tests on two of the monkeys found their vision had improved.
In the study, published this week in the journal PNAS, researchers grew retinal tissue from stem cells and then transplanted the tissue into the retinal area of rats with advanced RP. The tissue grew and in some cases adhered to the cells already in the retina and formed connections—a key factor in the success of this approach.