
看到白头发,第一反应是老了。约翰霍普金斯团队在《NEJM Evidence》的综述给出一个反直觉的对照:端粒长的人白发晚、看着年轻,但细胞活得久、突变攒得多,某些癌症风险更高;端粒短的人早生白发,整体癌症风险反而更低。本期《天方夜谭》,讲端粒和黑色素干细胞,也讲清一件事:这套推论只适用于罕见的遗传病,普通人别拿白发算命。
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