科学家成功使人体细胞“返老还童”
<p><span word="Eternal">Eternal</span> <span word="youth">youth</span> <span word="could">could</span> <span word="be">be</span> <span word="one">one</span> <span word="step">step</span> <span word="closer">closer</span> <span word="following">following</span> <span word="the">the</span> <span word="successful">successful</span> <span word="transformation">transformation</span> <span word="of">of</span> <span word="old">old</span> <span word="human">human</span> <span word="cells">cells</span> <span word="into">into</span> <span word="young">young</span> <span word="ones">ones</span>.</p><p>随着科学家成功地将人体衰老细胞转换成年轻的细胞，人类距离青春永驻的梦想将更近一步。</p><p><span word="The">The</span> <span word="process">process</span> <span word="increases">increases</span> <span word="the">the</span> <span word="length">length</span> <span word="of">of</span> <span word="the">the</span> '<span word="telomeres">telomeres</span>', <span word="which">which</span> <span word="are">are</span> <span word="the">the</span> <span word="protective">protective</span> <span word="caps">caps</span> <span word="on">on</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="chromosomes">chromosomes</span> <span word="that">that</span> <span word="impact">impact</span> <span word="ageing">ageing</span> <span word="and">and</span> <span word="disease">disease</span>.</p><p>端粒体是位于染色体末端的“保护帽”，有助于减缓人体衰老，降低疾病发生率。而将衰老细胞转化为年轻细胞的过程能延长端粒体的长度。</p><p><span word="Researchers">Researchers</span> <span word="in">in</span> <span word="the">the</span> <span word="US">US</span> <span word="say">say</span> <span word="the">the</span> <span word="technique">technique</span> <span word="could">could</span> <span word="extend">extend</span> <span word="human">human</span> <span word="life">life</span> <span word="and">and</span> <span word="provide">provide</span> <span word="new">new</span> <span word="hope">hope</span> <span word="for">for</span> <span word="battling">battling</span> <span word="diseases">diseases</span> <span word="that">that</span> <span word="arise">arise</span> <span word="from">from</span> <span word="old">old</span> <span word="age">age</span>.</p><p>美国研究人员称，此项技术将会延长人类寿命，为治疗各种老年疾病带来新的希望。</p><p><span word="Telomeres">Telomeres</span> - <span word="often">often</span> <span word="described">described</span> <span word="as">as</span> <span word="being">being</span> <span word="like">like</span> <span word="the">the</span> <span word="plastic">plastic</span> <span word="caps">caps</span> <span word="on">on</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="shoelaces">shoelaces</span> – <span word="help">help</span> <span word="keep">keep</span> <span word="DNA">DNA</span> <span word="healthy">healthy</span>.</p><p>端粒体常被描述为“鞋带末端的塑料帽”，能使脱氧核糖核酸（<span word="DNA">DNA</span>）保持健康状态。</p><p><span word="These">These</span> <span word="protective">protective</span> <span word="end">end</span> <span word="caps">caps</span> <span word="become">become</span> <span word="shorter">shorter</span> <span word="with">with</span> <span word="each">each</span> <span word="DNA">DNA</span> <span word="replication">replication</span>, <span word="and">and</span> <span word="eventually">eventually</span> <span word="are">are</span> <span word="no">no</span> <span word="longer">longer</span> <span word="able">able</span> <span word="to">to</span> <span word="protect">protect</span> <span word="DNA">DNA</span> <span word="from">from</span> <span word="sustaining">sustaining</span> <span word="damage">damage</span> <span word="and">and</span> <span word="mutations">mutations</span>, <span word="causing">causing</span> <span word="people">people</span> <span word="to">to</span> <span word="age">age</span>.</p><p>随着每次<span word="DNA">DNA</span>的复制，这些起保护作用的“末端冒”会变得越来越短，最终将丧失对<span word="DNA">DNA</span>的保护能力。失去保护层的<span word="DNA">DNA</span>将会受损并发生突变，人类因此会走向衰老。</p>
页:
[1]