Tag Archives: cause of blindness

Stem cell transplants stalled blindness in rats

blastocyst

Stem cell transplants stalled blindness in rats

Nerve stem cell transplants may help slow the progression of macular degeneration, the most common cause of blindness in the developed world, U.S. researchers said on Monday.

They said putting nerve stem cells from StemCells Inc near the retinas of rats with a form of macular degeneration helped keep the disease from advancing to blindness for several months.

“These cells improve the chemical environment in the back of the eye,” said Ray Lund of the Casey Eye Institute at Oregon Health & Science University in Portland, whose findings were presented at the Society for Neuroscience meeting in Chicago.

Lund said the mechanism is not clear, but he suspects that when immature nerve cells are placed near the retina, they produce growth factors that protect the cells from damage by the disease.

“It’s basically a chemical pump that is sitting in the right place and producing the right things,” Lund said in a telephone interview.

Where normally animals with eye disease lost their vision by three months old, rats that got the transplants kept their vision for at least seven months, he said.

“There is no evidence that they (the transplanted cells) do any damage,” Lund said, adding that the animals do not develop tumors, a key worry for stem cell transplants.

The findings raise hope for use of the treatment in humans with a range of diseases in which the retina become damaged, including age-related macular degeneration or AMD, which affects nearly 30 million people worldwide, including 15 million Americans.

Stem cell, Stem cell  Health, Stem cell  Health Latest, Stem cell  Health Information, Stem cell Health information, Stem cell  Health Photo,Stem cell  for Weight Health photo, Stem cell Health Latest, Stem cell  Health latest, Stem cell Video, Stem cell  video, Stem cell   Health History, Stem cell  Health history, Stem cell over Picture, history, Stem cell Asia, Stem cell  asia, Stem cell   Gallery, Stem cell for Weight gallery, Stem cell Photo Gallery, Stem cell  Picture, Stem cell   picture, Stem cell  Web, Malaysia Health, web Health, web Health picture, video photo, video surgery, gallery, laparoscopy, virus, flu, drug, video, Health Health, calories, photo, nutrition, health video, symptoms, Stem cell , medical, beating, diet, physical, Training, organic, gym, blister, exercise, weightloss, surgery, spiritual, eating, tips, skin, operation, bf1,