A long-term study by Italian researchers shows that stem cells can help restore vision in eyes that have been blinded by burns. Moreover, the restored vision remained stable over 10 years.
Patients whose eyes have suffered heat or chemical burns typically experience severe damage to the cornea -- the thin, transparent front of the eye that refracts light and contributes most of the eye's focusing ability. The Italian technique uses stem cells taken from the limbus, the border between the cornea and the white of the eye, to cultivate a graft of healthy cells in a lab.
During the 10-year study, the researchers implanted the healthy stem cells into the damaged cornea in 113 eyes of 112 patients. The treatment was fully successful in more than 75 percent of the patients, and partially successful in 13 percent. Success was defined as an absence of all symptoms and permanent restoration of the cornea.
Treatment outcome was initially assessed at one year, with up to 10 years of follow-up evaluations. The procedure was even successful in several patients whose burn injuries had occurred years earlier and who had already undergone surgery.
Current treatment for burned eyes involves taking stem cells from a patient's healthy eye, or from the eyes of another person, and transferring them to the burned eye. The new procedure, however, stimulates the limbal stem cells from the patient's own eye to reproduce in a lab culture. Several types of treatments using stem cells have proven successful in restoring blindness, but the long-term effectiveness shown here is significant. The treatment is only for blindness caused by damage to the cornea; it is not effective for repairing damaged retinas or optic nerves.
Chemical eye burns often occur in the workplace, but can also happen due to mishaps involving household cleaning products and automobile batteries.
The results of the study, based at Italy's University of Modena and Reggio Emilia, were published in the June 23 online issue of the New England Journal of Medicine.
The best part about this is that the procedure didn't use embryonic stem cells. This means that the treatment carries none of the usual controversy; so more patients are likely to get it in the near future.
The best part about this is that the procedure didn't use embryonic stem cells.
Have embryonic stem cells ever been use to cure anything? Every successful stem cell treat I have ever heard of using stem cells from the patient.
The treatments being developed from stem-cell research border on the miraculous. What wonderful news! Now if they could just get some of that hair to grow back on top of my head I would be ecstatic.
This is real and good science at work. I want to thank these "cats" for doing this type of work.
Why is the best part that they didn't use embryonic stem cells? This is supposed to be Popular Science, not Popular Religion.