30 April 2009

Stem cell therapy offers hope for blindness cure

A STEM cell therapy to cure the most common cause of blindness has been developed.

Macular degeneration is a medical condition usually found in older adults which results in a loss of vision whereby the light sensing cells in the macula malfunction and over time cease to work resulting in a black spot in the center of the visual field (the macula) because of damage to the retina.
The process uses the science of stem cell research, which involves the destruction of human embryos. In laboratory trials, it has been proven that stem cells can prevent blindness in rats with a similar disease to age related macular degeneration, as well as in pigs.
The treatment involves replacing a layer of degenerated cells with new ones created from embryonic stem cells. The stem-cells are transformed into replicas of the missing cells and are then placed on an artificial membrane, which is inserted in the back of the retina.
It is predicted that this procedure will soon become routine and be generally available within seven years.

Below Left: Before macular degeneration.
Below Right: After macular degeneration.