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Scientists Use Stem Cells To Regenerate the External Layer of a Human Heart (indy100.com)
schwit1 quotes a report from Indy100: A team of scientists from Massachusetts General Hospital and Harvard Medical School have used adult skin cells to regenerate functional human heart tissue. The study, published in the journal Circulation Research, detailed that the team took adult skin cells, using a technique called messenger RNA to turn them into pluripotent stem cells, before inducing them to become two different types of cardiac cells. Then for two weeks they infused the hearts with a nutrient solution, allowing them to develop under the same circumstances a heart would grow inside a human body. After the two week period, the hearts contained well-structured tissue, which appeared similar to that contained in developing human hearts. When shocked with electricity, they started beating. This represents the closest that medical researchers have come to growing an entire beating human heart.
Millions and millions more to come, Brave New World. Are you happy yet?
The abstract is quite explicit that this was for HUMAN stem cells.
Reptilian aliens and female dogs need not apply.
What abomination of nature have reptilian aliens and female dogs done to you to deserve being compared to Hillary!, anyway?
At least they weren't compared with Trump. Things can always be worse.
FYI, all cells use an intermediate form of nucleic acid (i.e., mRNA) to produce proteins. mRNA is transcribed from the host cell DNA and translated to construct protein(s) using ribosomes (yet another form of nucleic acid: rRNA).
>using a technique called messenger RNA
No, there isn't a technic called messenger RNA. They created artificial RNA messengers a special type of RNA which act like a messenger and is translated by ribosomes in proteins.
At least they weren't compared with Trump. Things can always be worse.
Yep, they could. We could be stuck with more Obama.
Small-business optimism soars after Trump election
Optimism on Main Street continues to soar in the wake of the election of Donald Trump. The National Federation of Independent Business' read on small-business sentiment for December hit its highest level since 2004, thanks to a sunnier outlook for business conditions.
The NFIB's index increased by 7.4 points in December to 105.8, up from November's 98.4. It's the largest month-over-month index change since it began in 1986.
Would that be actual hope and change?
Don't be too butthurt. :-)
The hyperlink in the summary should be modified to the following:
http://www.popsci.com/scientists-grow-transplantable-hearts-with-stem-cells?con=TrueAnthem&dom=fb&src=SOC&utm_campaign=&utm_content=58753766a167da00066f21ce&utm_medium=&utm_source=
The summary link leads to a summary of a different news article at Popular Science (above link). The Popular Science article provides sufficient information to understand the techniques used to produce stem cells to regrow cardiac tissue.
Yeah a great economy is all that matters.... oh wait I actually care about free speech, reduction in gun crime, better foreign relations, less hate crime, better education, less corruption, better healthcare and a vast swathe of other things that I guess you don't feel are needed.
PopSci had this story nearly a year ago ... back in March 2016
It's hope but a market which rallies might just be expecting a lot of short term gains before everything collapses.
"free speech, reduction in gun crime, better foreign relations, less hate crime, better education, less corruption, better healthcare"
We already have free speech.
Giving more people guns to defend themselves will result in less confident criminals.
Trump is friends with Russia.
Trump wants to fix Chicago.
Trump wants to get rid of illegals that mess up the education system among other things.
Trumps campaign exposes DNC corruption.
Obamacare is not better healthcare, it's shittier healthcare for everyone. Good healthcare costs money.
Good news, Trump is the President you want!
Has the baby been born that will live to it's 200th birthday?
SLOWER TRAFFIC KEEP RIGHT
if your girlfriend dumps you ... stem cell technology still has a long way to go ...
(understand the fucking article)
The summary is somewhat inaccurate and oversimplified (this is Slashdot, of course).
The authors took donor hearts and removed all the cardiac cells, leaving only the extracellular matrix, which is the scaffolding that cells reside in. They then created stem cells from skin cells, not via a technique called "messenger RNA" (which is a type of biological molecule and not a technique), but by reprogramming the skin cells by providing synthetic messenger RNAs that instruct the cells to make 5 proteins that cause a "reversal" to a stem cell-like state. These new stem cells were instructed to become cardiac cells, which spontaneously exhibited "a heart beat", and then seeded onto slices of the cardiac matrix from a donor heart, and even a full heart. The cells contracted in unison, and could be "paced" by a "pacemaker".
Limitations of this approach are that the you need a human heart to start with (until a scaffold could be 3D printed, for example), cells did not fully differentiate into mature heart muscle cells, don't seem to maintain this fate past a certain time frame, didn't develop into all cell types needed for a functioning heart, and contracted with only a fraction of the force that a normal human heart does. But damn, the bioreactor with "grown" heart is incredible to behold (figure 6E), and this appears to be an interesting step forward to lab grown organs.
I'm really going to miss Wheeler though. Brightest star in Obama's tenure. The speculation on his replacement is grim.
In their (generally laudable) opposition to the insane overregulation foisted upon the country by Democrats, Republicans have forgotten that regulation IS appropriate and beneficial when it levels a playing field for competition. They are idiots to cede that issue to the Democrats.