eyesmart.com.au

The Fred Hollows Foundation and the National Health and Medical Research Council (NHMRC) have announced a new five year partnership to combat diabetic retinopathy. The National Health and Medical Research Council is Australia's peak body for supporting health and medical research; for developing health advice for the Australian community, health professionals and governments; and for providing advice on ethical behaviour in health care and in the conduct of health and medical research.

Through the partnership, the NHMRC and The Fred Hollows Foundation will support research focusing on diabetic retinopathy by calling for applications for a Centre of Research Excellence. A Centre of Research Excellence is worth $2.5 million over five years.

By 2035 it is predicted that diabetes could be one of the leading causes of blindness. It is already the leading cause of blindness among working age adults. The world is facing an epidemic of diabetic retinopathy which will overload the already inadequate eye care services in poor countries. Diabetes is not like cataract; there is no quick fix. An innovative and collaborative approach is therefore required globally to tackle this huge problem.

Groundbreaking new findings by an international team of research chemists about how cataracts form could be used to help prevent the world’s leading cause of blindness, which currently affects nearly 20 million people worldwide.

"That's the dream, and this is a big step," said Rachel Martin, University of California (UC) at Irvine associate professor of chemistry and co-author of a paper featured on the December cover of the journal Structure. "Understanding the molecular mechanism of what goes wrong in the eye that leads to a cataract could lead to the development of better treatment options, including more sophisticated artificial lenses and drugs."

It has long been known that human eyes have a powerful ability to focus because of three kinds of crystallin proteins in their lenses, maintaining transparency via a delicate balance of both repelling and attracting light. Two types of crystallin are structural, but the third – dubbed a "chaperone" – keeps the others from clumping into cataracts if they're modified by genetic mutation, ultraviolet light or chemical damage.

The researchers painstakingly explored and identified the structures of the normal proteins and a genetic mutation known to cause cataracts in young children. They found that the chaperone proteins bind far more strongly to the mutated proteins in an effort to keep the lens clear. One major problem: Every human eye contains a finite number of the helpful proteins. Once they're used up, the researchers learned, weakened ones quickly begin to aggregate and form blinding cataracts. Now that this mechanism has been mapped at the molecular level, the team is hopeful that organic chemists can create sight-saving treatments to prevent such aggregation.

While people with adequate medical care can have corrective surgery for cataracts, the World Health Organization has found that millions suffer major vision loss because they do not have access to laser surgery or other options. By 2019, the number of people older than 50 with impaired sight is expected to grow even higher, particularly in China, India, Southeast Asia and Eastern Mediterranean nations.