睡眠少是因为“撒切尔基因”？
<p> 有些人每天睡9个小时，白天上班还是在犯困；有人只睡4、5个小时，却能全天精力充沛，效率超高。到底为什么会这样呢？研究人员说，是基因的问题。</p><p> </p><p> <span word="Researchers">Researchers</span> <span word="recently">recently</span> <span word="discovered">discovered</span> <span word="a">a</span> <span word="gene">gene</span> <span word="that">that</span> <span word="regulates">regulates</span> <span word="the">the</span> <span word="duration">duration</span> <span word="of">of</span> <span word="sleep">sleep</span> <span word="an">an</span> <span word="individual">individual</span> <span word="needs">needs</span>. <span word="The">The</span> <span word="new">new</span> <span word="findings">findings</span> <span word="may">may</span> <span word="explain">explain</span> <span word="why">why</span> <span word="some">some</span> <span word="people">people</span> <span word="appear">appear</span> <span word="to">to</span> <span word="have">have</span> <span word="an">an</span> <span word="internal">internal</span> <span word="alarm">alarm</span> <span word="clock">clock</span>, <span word="and">and</span> <span word="can">can</span> <span word="wake">wake</span> <span word="up">up</span> <span word="on">on</span> <span word="their">their</span> <span word="own">own</span>. <span word="It">It</span> <span word="may">may</span> <span word="also">also</span> <span word="explain">explain</span> <span word="why">why</span> <span word="some">some</span> <span word="people">people</span> <span word="are">are</span> <span word="light">light</span> <span word="sleepers">sleepers</span>, <span word="able">able</span> <span word="to">to</span> <span word="operate">operate</span> <span word="on">on</span> <span word="only">only</span> <span word="a">a</span> <span word="few">few</span> <span word="hours">hours</span> <span word="of">of</span> <span word="sleep">sleep</span>.</p><p> 研究人员最近发现了一种能够管理人们所需睡眠时间长短的基因。这一新发现或许能解释，为什么有些人好像有个内置的闹钟，总能自己定点醒来；而有的人每天只睡几个小时却依然精力充沛。</p><p> <span word="The">The</span> <span word="research">research</span> <span word="was">was</span> <span word="conducted">conducted</span> <span word="by">by</span> <span word="members">members</span> <span word="of">of</span> <span word="the">the</span> <span word="Ludwig">Ludwig</span> <span word="Maximilians">Maximilians</span> <span word="University">University</span> (<span word="LMU">LMU</span>) <span word="of">of</span> <span word="Munich">Munich</span>. <span word="The">The</span> <span word="gene">gene</span> <span word="the">the</span> <span word="team">team</span> <span word="identified">identified</span> <span word="is">is</span> <span word="called">called</span> <span word="ABCC">ABCC</span>9 <span word="and">and</span> <span word="has">has</span> <span word="been">been</span> <span word="nicknamed">nicknamed</span> <span word="the">the</span> “<span word="Thatcher">Thatcher</span> <span word="gene">gene</span>” <span word="in">in</span> <span word="honor">honor</span> <span word="of">of</span> <span word="former">former</span> <span word="British">British</span> <span word="Prime">Prime</span> <span word="Minister">Minister</span> <span word="Margaret">Margaret</span> <span word="Thatcher">Thatcher</span>, <span word="famous">famous</span> <span word="for">for</span> <span word="needing">needing</span> <span word="as">as</span> <span word="little">little</span> <span word="as">as</span> <span word="four">four</span> <span word="hours">hours</span> <span word="of">of</span> <span word="sleep">sleep</span> <span word="a">a</span> <span word="night">night</span>.</p><p> 该研究是由慕尼黑大学的研究人员进行的。他们发现的这个基因叫做<span word="ABCC">ABCC</span>9，后被人以前英国首相撒切尔夫人的名字命名，戏称为“撒切尔基因”，因为撒切尔夫人以睡眠时间少而著称，每天的睡眠时间只有四个小时。</p><p> <span word="Researchers">Researchers</span> <span word="discovered">discovered</span> <span word="that">that</span> <span word="people">people</span> <span word="who">who</span> <span word="had">had</span> <span word="two">two</span> <span word="copies">copies</span> <span word="of">of</span> <span word="one">one</span> <span word="common">common</span> <span word="variant">variant</span> <span word="of">of</span> <span word="ABCC">ABCC</span>9 <span word="slept">slept</span> <span word="for">for</span> ‘<span word="significantly">significantly</span> <span word="shorter">shorter</span>’ <span word="periods">periods</span> <span word="than">than</span> <span word="people">people</span> <span word="with">with</span> <span word="two">two</span> <span word="copies">copies</span> <span word="of">of</span> <span word="another">another</span> <span word="version">version</span>.</p>
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