JUST as a car’s battery wears down with age, mitochondria, our cellular powerhouses, produce energy less efficiently as we get older. Now, ageing mice have been given a new lease of life after being injected with a drug that jump-starts their mitochondria. Mitochondria contain genes coding for proteins important in energy production. So Shaharyar Khan of Gencia Corporation in Charlottesville, Virginia, and colleagues wondered if boosting the activity of these genes might reverse decline.
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