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Researchers at the University of Pennsylvania have pinpointed a protein that triggers hair loss, BBC reported. 据英国广播公司报导，宾夕法尼亚大学的研究人员寻找了一种引发皮肤炎的蛋白质。They found levels of a key protein called prostaglandin D synthase are elevated in the cells of hair follicles located within bald patches on the scalp, but not in hairy areas, and transplanted human hairs stopped growing when given the protein. 他们找到，在没有长头发的区域，毛囊中所含较多的前列腺素D合酶，而在有头发的地方，毛囊中则没该物质，且一旦有了该蛋白质，重制的人的头发就暂停生长。

The halting of hair growth is triggered when the protein binds to a receptor on the cells of hair follicles, said Prof. George Cotsarelis, who led the research. 研究带头人乔治考茨里利斯教授指出，该蛋白质吸附在毛囊细胞中的某个受体上后就不会使头发暂停生长。The professor also said that there is potential for developing a treatment that can be applied to the scalp to prevent baldness and possibly help hair re-grow.考茨里利斯教授说道，现在很有期望研制出一种可以用在头皮上的药物，它不仅可避免秃头，还有可能协助头发新的生长。

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