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Gene Responsible for Ageing Process Discovered – and Calorie Restriction Could Hel

In Mahabharat, the famous Indian epic, a prince donates his youth to his father so that he could continue to pursue his passions//.

Another kind of help is at hand now. For scientists say they have discovered a gene that plays a central role in the ageing process. And by manipulating that gene perhaps one could live longer, they hope.

The gene appears to be critical in extending the lifespan of animals that are subjected to a calorie-restricted diet -when they are slightly starved of high-calorie food but are given all the other nutrients they need.

It is well established that calorie-restricted diets lead to longer maximum life spans in practically every animal in which they have been studied, although the evidence it not as strong for humans.

"After 72 years of not knowing how calorie restriction works, we finally have genetic evidence to unravel the underlying molecular programme required for increased longevity in response to calorie restriction," said Andrew Dillin, of the Salk Institute in San Diego, California. "It's likely to play a role in the human condition, although we still don't know whether calorie restriction really works in humans. Studies in primates suggest it does."

The latest study focussed on a gene common to nematode worms, mice and humans. When the gene was blocked in the worms, the benefits of a calorie-restricted diet were lost and the worms lived shorter lives. Similarly, when the scientists were able to stimulate the gene they found that they could enhance the longevity of the worms so that their extended life spans came close to matching those worms on a calorie-restricted diet.

Scientists believe that the findings could unlock a genetic treasure-chest of potential pharmacological targets for developing drugs that can extend the human lifespan without having to follow a rigorous and difficult diet.

The first experiments in calorie-restricted diets go back to the 1930s.
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