Time runs its treacherous fingers along everything. The smoothed edges of a pebble. The polished wood of a staircase. The worn joints in our bones. Sometimes, even, the erosion of our memory. Every day, every hour, every minute, we get a little older. Until we reach that invisible threshold when we actually begin to feel the years, and what getting older means. Our pace becomes slower and our muscles, stiff. Our bodies gradually bend forward and parts cave in. One hand begins to shake. Our thoughts are not so nimble. And perhaps for the first time we overhear someone say that we are old. Yet it is less a question of us getting old, than our bodies giving in to time. Cells inside us are losing touch. Information is being lost. Metabolic pathways become hesitant. Cells become weary, stifle and die. Many factors are involved in the very complex process of ageing. One of them is Plasminogen activator inhibitor 1 - or PAI-1. Scientists, however, discovered that a particular mutation in PAI-1 may actually be partly responsible for lengthening a person's life as opposed to shortening it.
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