cholesterol drugs \may save sight\ for the elderly
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Macular degeneration common form of blindness

Cholesterol drugs \'may save sight\' for the elderly

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Emiratesvoice, emirates voice Cholesterol drugs \'may save sight\' for the elderly

Studies show high cholesterol levels could be causing macular degeneration
London - Arabstoday

Studies show high cholesterol levels could be causing macular degeneration Eye drops designed to lower cholesterol may be able to prevent one of the most common forms of blindness, according to US researchers. They showed how high cholesterol levels could affect the immune system and lead to macular degeneration.
Tests on mice and humans, published in the journal Cell Metabolism, showed that immune cells became destructive when they were clogged with fats.
Others cautioned that the research was still at an early stage.
The macula is a region in the eye which is responsible for fine detail. It is essential for reading, driving and recognising people's faces.
Macular degeneration is more common in old age. It starts in a "dry" form in which the light-sensing cells in the eye become damaged, but can progress into the far more threatening "wet" version, when newly formed blood vessels can rapidly cause blindness.
Doctors at the Washington University School of Medicine investigated the role of macrophages, a part of the immune system, in the transition from the dry to the wet form of the disease.
One of the researchers, Dr Rajendra Apte, said the role of macrophages changed and they triggered the production of new blood vessels.
"Instead of being protective, they accelerate the disease, but we didn't understand why they switched to become the bad cells," he said.
Normally the cells can "eat" fatty deposits and send them back into the blood.
However, their research showed that older macrophages struggle. They could still eat the fats, but they could not expel them. So they became "bloated", causing inflammation which in turn led to the creation of new blood vessels.
Dr Apte said: "Based on our findings, we need to investigate whether vision loss caused by macular degeneration could be prevented with cholesterol-lowering eye drops or other medications that might prevent the build-up of lipids beneath the retina."

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