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揭秘为什么有些地方长毛发有些地方却不长?(双
2018-12-06 17:46 (点击数:次)

  Why can millions of hairs grow from our heads, and yet our palms and the soles of our feet are as bare as anything? It all comes down to a special molecule in our bodies, according to the scientists who have found it.

  为什么我们头上长着数以百万计的头发?但是我们的手掌和脚底却光秃秃的?据最新研究表明,这种现象归结于我们身体中的一种特殊分子。

  The hairless regions of our skin secrete a special type of molecule known as an inhibitor. This particular one is a protein named Dickkopf 2 (DKK2). These effectively brick-up the WNT pathway, which is in charge of triggering hair growth in our bodies. Scientists at the University of Pennsylvania School of Medicine believe certain animals have evolved to produce DKK2 in certain parts of their bodies, depending on what will best help different creatures to survive.

  皮肤的无毛区域会分泌一种特殊的带有抑制作用的分子。这个特殊的蛋白质叫列兵巴克做Dickkopf 2(DKK2)。这种分子会有效阻断WNT通路—负责触发我们身体毛发生长的机制。宾夕法尼亚大学医学院的科学家认为,那些既定的生物种类已经能够实现在需要的部位释放DKK2,而这也在很大程度上帮助了这些物种生存下去。

  In this study, we’ve shown the skin in hairless regions naturally produces an inhibitor that stops WNT from doing its job, Professor Sarah E. Millar, an author of the study published in the journal Cell Reports, commented.

  “在这项研究中,我们发现无毛区域的皮肤自然会产生一种抑制剂,阻止WNT发挥作用,”一篇由Sarah E.Millar撰写并发表在《细胞报告》杂志上的文章这样写道。

  Millar, who is a professor in dermatology at the University of Pennsylvania School of Medicine, continued: "We know that WNT signaling is critical for the development of hair follicles; blocking it causes hairless skin, and switching it on causes formation of more hair."

  Millar是宾夕法尼亚大学医学院的皮肤科教授,他说:“我们知道WNT信号对毛囊的发育至关重要;如果它的作用受到抑制,就会导致无毛皮肤;如果把这个通路打开,就会促使更多毛发的形成。”

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