Researchers have succeeded in growing light-sensing eye cells from human skin cells, opening the possibility of restoring sight to patients blinded by certain diseases.
Researchers at the University of Wisconsin have grown retinal cells from skin cells, a development that could be used to treat degenerative eye diseases.
A number of genetic disorders involve the degeneration of the retina, the light-sensitive cells at the back of the eye. The disorders cause the cells to die, and vision is gradually lost, resulting in blindness.
The researchers manipulated human skin cells to act like embryonic stem cells, which can be coaxed to grow into any tissue in the body. The development suggests that doctors may someday be able to repair damage to the retina with new cells generated from the patient's own skin.
Lead researcher David Gamm, a professor of ophthalmology and visual sciences at the University of Wisconsin, says his research could benefit people with macular degeneration and retinitis pigmentosa. In both diseases, the visual field gradually narrows, eventually leading to blindness.
"In particular these diseases are quite devastating to the patients who are affected by them," he said. "They rob them of their vision either when they are younger in the case of retinitis pigmentosa or when they are older in the case when they are older in the case of macular degeneration. And there are no cures and very few if any treatments for them. So it is a big need, especially from the macular degeneration standpoint, as the population ages."
An estimated one million people worldwide are affected by macular degeneration alone.
Gamm says the laboratory process of creating human retinal cells helps researchers better understand how eyes develop, so diseases that lead to vision loss may someday be treated or even cured with retinal stem cells.
The development could also further research on genetic eye conditions. For example, using skin cells from a patient with retinitis pigmintosa researchers could create retinal cells with the defective gene and subject them to various potential drugs for treating or curing the condition.
Gamm says the same technique could help scientists find treatments for other genetic diseases, not just eye disorders.
"Now we could take theoretically any human disease, especially those that have specific gene defects underlying them, and produce cell types of interest in those diseases and test them directly for the efficacy of various drugs or how in fact those cells die in disease," he added.
The study on the development of eye cells is published this week in the journal Proceedings of the National Academy of Sciences.
By Jessica Berman
Washington
Friday, August 28, 2009
Tuesday, August 4, 2009
An Overview of Macular Degeneration Research
Doctors and scientists are currently conducting macular degeneration research. Macular degeneration research studies are designed to answer important questions and to find out whether new approaches are safe and effective. This research already has led to many advances, and researchers continue to search for more effective methods for dealing with macular degeneration.
Current Areas of Focus in Macular Degeneration Research
A number of macular degeneration research studies are being conducted to learn what causes macular degeneration and how it can be better treated.
One macular degeneration research study is also evaluating the effects of certain vitamins and minerals in preventing or slowing the progress of the disease.
At the same time, scientists studying macular degeneration are trying to learn more about how the cells in the retina work. This knowledge will allow them one day to pinpoint the causes of macular degeneration and come up with ways to prevent it.
Other areas of current research include:
* Studying the possibility of transplanting healthy cells into a diseased retina
* Evaluating families with a history of macular degeneration to understand genetic and hereditary factors that may cause the disease
* Looking at certain anti-inflammatory treatments for the wet form of macular degeneration.
This macular degeneration research should provide better ways to detect, treat, and prevent vision loss in people with the disease.
for more information www.maculardegenerationassociation.org
Current Areas of Focus in Macular Degeneration Research
A number of macular degeneration research studies are being conducted to learn what causes macular degeneration and how it can be better treated.
One macular degeneration research study is also evaluating the effects of certain vitamins and minerals in preventing or slowing the progress of the disease.
At the same time, scientists studying macular degeneration are trying to learn more about how the cells in the retina work. This knowledge will allow them one day to pinpoint the causes of macular degeneration and come up with ways to prevent it.
Other areas of current research include:
* Studying the possibility of transplanting healthy cells into a diseased retina
* Evaluating families with a history of macular degeneration to understand genetic and hereditary factors that may cause the disease
* Looking at certain anti-inflammatory treatments for the wet form of macular degeneration.
This macular degeneration research should provide better ways to detect, treat, and prevent vision loss in people with the disease.
for more information www.maculardegenerationassociation.org
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