干细胞有望无限造血，再也不需要献血了？
<p>日前美国科学家宣布成功生产出造血干细胞，未来有望利用人体细胞无限造血，可能不再需要献血者了。</p><p><span word="Blood">Blood</span> <span word="donors">donors</span> <span word="may">may</span> <span word="no">no</span> <span word="longer">longer</span> <span word="be">be</span> <span word="needed">needed</span> <span word="in">in</span> <span word="the">the</span> <span word="future">future</span> <span word="after">after</span> <span word="scientists">scientists</span> <span word="showed">showed</span> <span word="it">it</span> <span word="was">was</span> <span word="possible">possible</span> <span word="to">to</span> <span word="create">create</span> <span word="blood">blood</span> <span word="from">from</span> <span word="stem">stem</span> <span word="cells">cells</span>.</p><p>科学家们表明干细胞有望用于造血，未来可能不再需要献血者。</p><p><span word="The">The</span> 20 <span word="year">year</span> <span word="project">project</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="an">an</span> <span word="unlimited">unlimited</span> <span word="number">number</span> <span word="of">of</span> <span word="blood">blood</span> <span word="and">and</span> <span word="immune">immune</span> <span word="cells">cells</span> <span word="for">for</span> <span word="transplants">transplants</span>, <span word="simply">simply</span> <span word="by">by</span> <span word="reprogramming">reprogramming</span> <span word="a">a</span> <span word="patient">patient</span>’<span word="s">s</span> <span word="own">own</span> <span word="skin">skin</span> <span word="cells">cells</span>.</p><p>这项研究持续了20年，为将来只需改造患者自身的皮肤细胞就可以获得移植手术所需的无限量血液和免疫细胞做好了准备。</p>
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