UK scientists edit DNA of human embryos 英国研究团队编辑人类胚胎中的 DNA
<p><span word="UK">UK</span> <span word="scientists">scientists</span> <span word="edit">edit</span> <span word="DNA">DNA</span> <span word="of">of</span> <span word="human">human</span> <span word="embryos">embryos</span> 英国研究团队编辑人类胚胎中的 <span word="DNA">DNA</span></p><p> <span word="DNA">DNA</span> 是生命的蓝图。英国的一组研究者已在试验中修改了人体胚胎的构造，这是英国首例。这个来自弗朗西斯·克里克研究所（<span word="The">The</span> <span word="Francis">Francis</span> <span word="Crick">Crick</span> <span word="Institute">Institute</span>）的团队即将解开有关人类生命起始的谜题之一。了解卵子受精后的情况可以帮助研究者寻找改进试管受精技术的方式，同时也可以解释一部分女性流产的原因。请听报道。</p><p><span word="This">This</span> <span word="research">research</span> <span word="is">is</span> <span word="unlocking">unlocking</span> <span word="the">the</span> <span word="mysteries">mysteries</span> <span word="of">of</span> <span word="life">life</span>. <span word="We">We</span> <span word="all">all</span> <span word="started">started</span> <span word="off">off</span> <span word="as">as</span> <span word="a">a</span> <span word="single">single</span> <span word="fertilised">fertilised</span> <span word="egg">egg</span> <span word="that">that</span> <span word="grows">grows</span> <span word="into">into</span> <span word="a">a</span> <span word="body">body</span> <span word="made">made</span> <span word="of">of</span> <span word="billions">billions</span> <span word="of">of</span> <span word="cells">cells</span>, <span word="yet">yet</span> <span word="the">the</span> <span word="first">first</span> <span word="few">few</span> <span word="steps">steps</span> <span word="are">are</span> <span word="as">as</span> <span word="critical">critical</span> <span word="as">as</span> <span word="they">they</span>'<span word="re">re</span> <span word="poorly">poorly</span> <span word="understood">understood</span>.</p><p><span word="The">The</span> <span word="team">team</span> <span word="at">at</span> <span word="the">the</span> <span word="Francis">Francis</span> <span word="Crick">Crick</span> <span word="Institute">Institute</span> <span word="is">is</span> <span word="investigating">investigating</span> <span word="instructions">instructions</span> <span word="in">in</span> <span word="our">our</span> <span word="DNA">DNA</span> <span word="known">known</span> <span word="as">as</span> <span word="genes">genes</span> <span word="that">that</span> <span word="are">are</span> <span word="highly">highly</span> <span word="active">active</span> <span word="in">in</span> <span word="the">the</span> <span word="week">week</span> <span word="after">after</span> <span word="fertilisation">fertilisation</span>. <span word="By">By</span> <span word="editing">editing</span> <span word="DNA">DNA</span> <span word="to">to</span> <span word="turn">turn</span> <span word="genes">genes</span> <span word="off">off</span>, <span word="they">they</span> <span word="can">can</span> <span word="work">work</span> <span word="out">out</span> <span word="what">what</span> <span word="they">they</span> <span word="do">do</span>.</p><p><span word="Their">Their</span> <span word="first">first</span> <span word="experiments">experiments</span> <span word="published">published</span> <span word="in">in</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Nature">Nature</span> <span word="show">show</span> <span word="how">how</span> <span word="instructions">instructions</span> <span word="called">called</span> <span word="OCT">OCT</span>4 <span word="are">are</span> <span word="essential">essential</span> <span word="for">for</span> <span word="helping">helping</span> <span word="the">the</span> <span word="embryo">embryo</span> <span word="grow">grow</span> <span word="from">from</span> <span word="a">a</span> <span word="single">single</span> <span word="cell">cell</span> <span word="to">to</span> <span word="a">a</span> <span word="hollow">hollow</span> <span word="sphere">sphere</span> <span word="called">called</span> <span word="a">a</span> <span word="blastocyst">blastocyst</span>.</p><p><span word="Researcher">Researcher</span> <span word="Dr">Dr</span> <span word="Kathy">Kathy</span> <span word="Niakan">Niakan</span> <span word="says">says</span> <span word="getting">getting</span> <span word="a">a</span> <span word="complete">complete</span> <span word="understanding">understanding</span> <span word="of">of</span> <span word="early">early</span> <span word="development">development</span> <span word="could">could</span> <span word="help">help</span> <span word="infertile">infertile</span> <span word="couples">couples</span>. <span word="These">These</span> <span word="experiments">experiments</span> <span word="have">have</span> <span word="been">been</span> <span word="legal">legal</span> <span word="since">since</span> 2008 <span word="and">and</span> <span word="have">have</span> <span word="been">been</span> <span word="recently">recently</span> <span word="made">made</span> <span word="possible">possible</span> <span word="by">by</span> <span word="rapid">rapid</span> <span word="advances">advances</span> <span word="in">in</span> <span word="the">the</span> <span word="field">field</span> <span word="of">of</span> <span word="gene">gene</span> <span word="editing">editing</span>.</p><p><span word="The">The</span> <span word="work">work</span> <span word="of">of</span> <span word="the">the</span> <span word="Crick">Crick</span> <span word="in">in</span> <span word="London">London</span> <span word="is">is</span> <span word="a">a</span> <span word="feat">feat</span> <span word="of">of</span> <span word="pure">pure</span> <span word="scientific">scientific</span> <span word="discovery">discovery</span> <span word="and">and</span> <span word="the">the</span> <span word="embryos">embryos</span> <span word="will">will</span> <span word="never">never</span> <span word="be">be</span> <span word="implanted">implanted</span> <span word="in">in</span> <span word="the">the</span> <span word="womb">womb</span>. <span word="But">But</span> <span word="other">other</span> <span word="groups">groups</span> <span word="are">are</span> <span word="working">working</span> <span word="on">on</span> <span word="modifying">modifying</span> <span word="embryos">embryos</span> <span word="to">to</span> <span word="eliminate">eliminate</span> <span word="inherited">inherited</span> <span word="diseases">diseases</span>.</p>
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