英3D打印干细胞 或可造人体器官
<p><span word="Scientist">Scientist</span> <span word="Dr">Dr</span> <span word="Will">Will</span> <span word="Shu">Shu</span>, <span word="from">from</span> <span word="Heriot">Heriot</span>-<span word="Watt">Watt</span> <span word="University">University</span> <span word="in">in</span> <span word="Edinburgh">Edinburgh</span> <span word="has">has</span> <span word="lead">lead</span> <span word="the">the</span> <span word="research">research</span> <span word="into">into</span> <span word="the">the</span> 3<span word="D">D</span> <span word="printing">printing</span> <span word="technique">technique</span> <span word="that">that</span> <span word="produces">produces</span> <span word="clusters">clusters</span> <span word="of">of</span> <span word="stem">stem</span> <span word="cells">cells</span></p><p><span word="A">A</span> 3<span word="D">D</span> <span word="printing">printing</span> <span word="technique">technique</span> <span word="that">that</span> <span word="produces">produces</span> <span word="clusters">clusters</span> <span word="of">of</span> <span word="stem">stem</span> <span word="cells">cells</span> <span word="could">could</span> <span word="speed">speed</span> <span word="up">up</span> <span word="progress">progress</span> <span word="towards">towards</span> <span word="the">the</span> <span word="creation">creation</span> <span word="of">of</span> <span word="artificial">artificial</span> <span word="organs">organs</span>, <span word="scientists">scientists</span> <span word="claim">claim</span>.</p><p><span word="In">In</span> <span word="the">the</span> <span word="more">more</span> <span word="immediate">immediate</span> <span word="future">future</span> <span word="it">it</span> <span word="could">could</span> <span word="be">be</span> <span word="used">used</span> <span word="to">to</span> <span word="generate">generate</span> <span word="biopsy">biopsy</span>-<span word="like">like</span> <span word="tissue">tissue</span> <span word="samples">samples</span> <span word="for">for</span> <span word="drug">drug</span> <span word="testing">testing</span>.</p><p><span word="The">The</span> <span word="technique">technique</span> <span word="relies">relies</span> <span word="on">on</span> <span word="an">an</span> <span word="adjustable">adjustable</span> "<span word="microvalve">microvalve</span>" <span word="to">to</span> <span word="build">build</span> <span word="up">up</span> <span word="layers">layers</span> <span word="of">of</span> <span word="human">human</span> <span word="embryonic">embryonic</span> <span word="stem">stem</span> <span word="cells">cells</span> (<span word="hESCs">hESCs</span>).</p><p><span word="Altering">Altering</span> <span word="the">the</span> <span word="nozzle">nozzle</span> <span word="diameter">diameter</span> <span word="precisely">precisely</span> <span word="controls">controls</span> <span word="the">the</span> <span word="rate">rate</span> <span word="at">at</span> <span word="which">which</span> <span word="cells">cells</span> <span word="are">are</span> <span word="dispensed">dispensed</span>.</p><p><span word="Lead">Lead</span> <span word="scientist">scientist</span> <span word="Dr">Dr</span> <span word="Will">Will</span> <span word="Shu">Shu</span>, <span word="from">from</span> <span word="Heriot">Heriot</span>-<span word="Watt">Watt</span> <span word="University">University</span> <span word="in">in</span> <span word="Edinburgh">Edinburgh</span>, <span word="said">said</span>: "<span word="We">We</span> <span word="found">found</span> <span word="that">that</span> <span word="the">the</span> <span word="valve">valve</span>-<span word="based">based</span> <span word="printing">printing</span> <span word="is">is</span> <span word="gentle">gentle</span> <span word="enough">enough</span> <span word="to">to</span> <span word="maintain">maintain</span> <span word="high">high</span> <span word="stem">stem</span> <span word="cellviability">cellviability</span>, <span word="accurate">accurate</span> <span word="enough">enough</span> <span word="to">to</span> <span word="produce">produce</span> <span word="spheroids">spheroids</span> <span word="of">of</span> <span word="uniform">uniform</span> <span word="size">size</span>, <span word="and">and</span> <span word="most">most</span> <span word="importantly">importantly</span>, <span word="the">the</span> <span word="printed">printed</span> <span word="hESCs">hESCs</span> <span word="maintained">maintained</span> <span word="their">their</span> <span word="pluripotency">pluripotency</span> - <span word="the">the</span> <span word="ability">ability</span> <span word="to">to</span> <span word="differentiate">differentiate</span> <span word="into">into</span> <span word="any">any</span> <span word="other">other</span> <span word="cell">cell</span> <span word="type">type</span>."</p><p><span word="Embryonic">Embryonic</span> <span word="stem">stem</span> <span word="cells">cells</span>, <span word="which">which</span> <span word="originate">originate</span> <span word="from">from</span> <span word="early">early</span> <span word="stage">stage</span> <span word="embryos">embryos</span>, <span word="are">are</span> <span word="blank">blank</span> <span word="slates">slates</span> <span word="with">with</span> <span word="the">the</span> <span word="potential">potential</span> <span word="to">to</span> <span word="become">become</span> <span word="any">any</span> <span word="type">type</span> <span word="of">of</span> <span word="tissue">tissue</span> <span word="in">in</span> <span word="the">the</span> <span word="body">body</span>.</p><p><span word="The">The</span> <span word="research">research</span> <span word="is">is</span> <span word="reported">reported</span> <span word="today">today</span> <span word="in">in</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Biofabrication">Biofabrication</span>.</p><p><span word="In">In</span> <span word="the">the</span> <span word="long">long</span> <span word="term">term</span>, <span word="the">the</span> <span word="new">new</span> <span word="printing">printing</span> <span word="technique">technique</span> <span word="could">could</span> <span word="pave">pave</span> <span word="the">the</span> <span word="way">way</span> <span word="for">for</span> <span word="hESCs">hESCs</span> <span word="being">being</span> <span word="incorporated">incorporated</span> <span word="into">into</span> <span word="transplant">transplant</span>-<span word="ready">ready</span> <span word="laboratory">laboratory</span>-<span word="made">made</span> <span word="organs">organs</span> <span word="and">and</span> <span word="tissues">tissues</span>, <span word="said">said</span> <span word="the">the</span> <span word="researchers">researchers</span>.</p><p><span word="The">The</span> 3<span word="D">D</span> <span word="structures">structures</span> <span word="will">will</span> <span word="also">also</span> <span word="enable">enable</span> <span word="scientists">scientists</span> <span word="to">to</span> <span word="create">create</span> <span word="more">more</span> <span word="accurate">accurate</span> <span word="human">human</span> <span word="tissue">tissue</span> <span word="models">models</span> <span word="for">for</span> <span word="drug">drug</span> <span word="testing">testing</span>.</p>
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