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It's now been discovered that progeria
经实验发现早衰症
is caused by a mutation in a gene called lamin A.
是由一种叫核纤层蛋白A变异引起的
This leads the body to produce an abnormal protein
这种蛋白使那些患病小孩体内的细胞
within these children's cells
产生一种异常蛋白质
which blocks their normal functioning.
阻碍细胞的正常功能
What's interesting about the disease
这种疾病有趣的地方是
is that the same abnormal protein
这种异常蛋白质
is also made at very, very low levels
在那些没有发生变异的健康人身上
in healthy individuals who do not have the mutation.
产生的概率是非常非常低的
The level of this abnormal protein
这种蛋白质异常的状况
doesn't increase over time as we age,
不会随着我们年龄的增长而增加
but what seems to happen is that
但是看起来
cells from old individuals are not able to
老年人体内的细胞抵抗
cope with this protein any more which is trying to do damage.
这种破坏性蛋白质的能力会弱些
Other proteins also go wrong
随着年龄的增长 其他细胞也会出现病变
and as we get older we have more difficulty repairing the damage.
那时 自我修复的功能就会越来越差
Dr Misteli believes this build-up of damaged protein
米斯泰林博士觉得这种破损性蛋白质的产生
within our cells could be at the heart of how we all age.
可能就是我们如何衰老的根本原因
