3D列表機打造幹細胞 大量複製不是(原文新聞與新聞影片)

孩子剛出生的時候，擠帶血的廣告就自然的送到我們的眼前，家裏的財務一直不是很好，當然就不考慮，而且擠帶血在不到十五年後的末來，就會沒有用處，因為最終會用自身的普通細胞，產生所需要組織和器官，這和國際雷爾運動的訊息推廣人，在1975年7月所說的一樣，隨著人口增加、就會有人開始研究如何複製生物、不久的未來，一定會取代要用擠帶血、幹細胞、胚胎細胞等有道德爭議的生物複製技術。這則新聞就是說明這樣的未來。

http://www.ettoday.net/news/20130510/205008.htm

▲幹細胞可以轉變成人體內各式不同功能的細胞，但取得部易且備受爭議。(圖／取自維基百科)

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3D列印技術近期火紅，可以大量並精確地複製許多東西。從雕像、立體名片甚至槍枝和器官都可以完全列印出來。現在科學家已經有技術複製打造出幹細胞，不再需要透過人體提煉出來，對於醫療有跨時代的提升。

英國與蘇格蘭6位科學家使用一種控制閥式細胞列印機(valve-based cell printer)，在其中裝放入生物墨水製造幹細胞。由此幹細胞可以轉變成人體內各式不同功能的細胞，有助於醫療使用。雖然幹細胞因為具多功能性，而被生物學家重視，然而幹細胞的取得不易且備受爭議。除了從常見的臍帶血幹細胞，另一種胚胎幹細胞必須從婦女墮胎後的嬰兒胚胎取得，因此受到不少人的反對。

生物墨水從只有 0.002 英吋（約 0.005 公分）的噴嘴噴出，打造出來的細胞有70% 到 90% 可以存活 72 小時。經過三天後，科學家發現它仍在生長且維持多功能性。科學家表示未來該技術能大量複製幹細胞，甚至醫生不需為你開刀就能修復你體內的器官。

▼製造出來的幹細胞存活72小時後，仍在生長且維持多功能性。(圖／取自VentureBeat)

原文網址: 3D列表機打造幹細胞　大量複製不是夢 | ETtoday生活新聞 | ETtoday 新聞雲 http://www.ettoday.net/news/20130510/205008.htm#ixzz2X8o7m4gu
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http://venturebeat.com/2013/02/06/first-ever-uk-scientists-use-3d-printer-to-print-human-stem-cells/

First ever: UK scientists use 3D printer to print human stem cells

February 6, 2013 10:49 AM

John Koetsier

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Sure, 3D printing is cool and wonderful, and even can make awesome three-dimensional business cards. But can it save your life?

Well, perhaps.

Six scientists in the UK and Scotland have successfully printed human stem cells with a “valve-based cell printer” that uses bio-inks to fabricate groups of viable stem cells that retain their ability to become any type of cell in your body.

Stem cells are valued by biological scientists for research because they are “pluripotent:” they can develop into almost anything a human body needs such as skin cells, muscle tissue, or internal organs. But collecting and using them has been a controversial process, as one source for stems cells has been embryonic tissue harvested after abortions. And using them inside the human body has been difficult.

This new process essentially bio-fabricates usable conglomerations of human stem cells by printing bio-ink, made up of a number of organic components including HEK293 (human embryonic kidney) via a valve-based printer with very fine nanoliter capacity (an ounce of liquid contains 29,573,529 nanoliters). The nozzle of the valve-based printer that they used is only .002 inches wide.

Between 70 and 95 percent of the cells survived past 72 hours, and three days after, the cells tested positive for pluripotency, and seemed to be growing:

Essentially, the scientists printed arrays of stem cells that could be used in future in-vitro organ regenerations. Maybe you won’t get a new motor, but you could get an on-site re-build … and surgeons won’t have to take your body apart to do it, either.

Along the same lines, the scientists speculate that “direct in-vivo cell printing for tissue regeneration” will become possible, allowing doctors of the future to heal internal injuries without surgery.

Which is a little bit cooler than 3D printed business cards, no? And better than 3D-printed guns, surely.

photo credits: Tatcher a Hainu via photopin cc, Alan Faulkner-Jones, Sebastian Greenhough, Jason A King, John Gardner, Aidan Courtney, and Wenmiao Shu, Hat tip: ExtremeTech

Read more at http://venturebeat.com/2013/02/06/first-ever-uk-scientists-use-3d-printer-to-print-human-stem-cells/#0cFx2Fuf5ISkCm9X.99