Half man, half machine: Scientists engineer first 'cyborg' tissue - which uses living human cells and organic polymers

วันอาทิตย์ที่ 9 กันยายน พ.ศ. 2555

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Half man, half machine: Scientists engineer first 'cyborg' tissue - which uses living human cells and organic polymers

  • Harvard scientists created 'cyborg' skin from neurons, heart cells, and nano-electronic wiring
  • Wiring allows scientists to detect and respond to pH changes on the tissue's surface, the same as human skin
PUBLISHED: 04:43 GMT, 30 August 2012 UPDATED: 16:31 GMT, 30 August 2012
It like it’s something out of a science-fiction movie – genius scientists engineer a synthetic skin that’s part living, part electronics.
But scientists at Harvard University have done just that, creating meshes of electronic and biological tissue.
The end result is cyborg tissue, which is created from electrodes and wires combined on a Nano-scale.
Harvard creates cyborg flesh that?s half man, half machine
Engineering humanity: Scientists at Harvard have found a way to create cyborg skin, using nano-wires to mesh and human cells
High tech: Here, cardiac cells are pictured with a nano-electroic electrode highlighted
High tech: Here, cardiac cells are pictured with a nano-electroic electrode highlighted
The results, published in Nature Materials, detail how scientists in the lab embedded electrical nanowires into the lab-grown flesh.
Dr Charles Lieber, who is a chemistry professor at Harvard and the leader of the research team, told the Harvard Gazette: ‘With this technology, for the first time, we can work at the same scale as the unit of biological system without interrupting it. 
‘Ultimately, this is about merging tissue with electronics in a way that it becomes difficult to determine where the tissue ends and the electronics begin.’
 
The Gazette notes that the researches initially worried about how the ‘skin,’ once implanted, would sense and react to chemical and electrical changes.
Normal human skin is capable of sensing oxygen, pH, and other elements in the air, and reacts to each one accordingly. 
The challenge, then, was engineering skin that would do the same.
First, a 3D mesh of organic polymer is laid out with nanoscale wires within. According to Nature Materials, the wires serve as ‘critical sensing elements.’
High tech: A computer chip, containing a sample of nano tissue
High tech: A computer chip, containing a sample of nano tissue
Man vs. machine: Cyborg skin has been imagined in Hollywood for decades, including the 1991 blockbuster Terminator 2
Man vs. machine: Cyborg skin has been imagined in Hollywood for decades, including the 1991 blockbuster Terminator 2
Then, they worked in human neurons, heart cells, and blood vessels.
When the substrate was dissolved, researchers had mesh they could contour into the shapes they needed.
Because of the embedded wiring, scientists were able to obtain accurate readings of pH.
Human cyborgs have been imagined in Hollywood for decades, famously in the Star Trek and Terminator franchises.
In both, the cyborg characters have decidedly human appearances, though below the epidermis still lurks a robotic core of metal.
However, the Harvard scientists are not looking to such lofty ends. 
Dr Lieber told the Gazette said their invention could greatly benefit the pharmaceutical industry, which could test its drugs on the cyborg skin instead of few layers of cultured cells.


Read more: http://www.dailymail.co.uk/news/article-2195586/Half-man-half-machine-Scientists-engineer-cyborg-tissue--uses-living-human-cells-organic-polymers.html#ixzz25A5aOjwY

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WARNING FROM RAEL: For those who don't use their intelligence at its
full capacity, the label "selected by RAEL" on some articles does not
mean that I agree with their content or support it. "Selected by RAEL"
means that I believe it is important for the people of this planet to
know about what people think or do, even when what they think or do is
completely stupid and against our philosophy. When I selected articles
in the past about stupid Christian fundamentalists in America praying
for rain, I am sure no Rael-Science reader was stupid enough to
believe that I was supporting praying to change the weather. So, when
I select articles which are in favor of drugs, anti-semitic,
anti-Jewish, racist, revisionist, or inciting hatred against any group
or religion, or any other stupid article, it does not mean that I
support them. It just means that it is important for all human beings
to know about them. Common sense, which is usually very good among our
readers, is good enough to understand that. When, like in the recent
articles on drug decriminalization, it is necessary to make it
clearer, I add a comment, which in this case was very clear: I support
decriminalizing all drugs, as it is stupid to throw depressed and sad
people (as only depressed and sad people use drugs) in prison and ruin
their life with a criminal record. That does not mean that there is
any change to the Message which says clearly that we must not use any
drug except for medical purposes. The same applies to the freedom of
expression which must be absolute. That does not mean again of course
that I agree with anti-Jews, antisemites, racists of any kind or
anti-Raelians. But by knowing your enemies or the enemies of your
values, you are better equipped to fight them. With love and respect
of course, and with the wonderful sentence of the French philosopher
Voltaire in mind: "I disapprove of what you say, but I will defend to
the death your right to say it".