Stem cells make 'retina in a dish'

spf1007

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Mouse cells have been coaxed into forming a retina, the most complex tissue yet engineered.

A retina made in a laboratory in Japan could pave the way for treatments for human eye diseases, including some forms of blindness.

Created by coaxing mouse embryonic stem cells into a precise three-dimensional assembly, the 'retina in a dish' is by far and away the most complex biological tissue engineered yet, scientists say.

"There's nothing like it," says Robin Ali, a human molecular geneticist at the Institute of Ophthalmology in London who was not involved in the study. "When I received the manuscript, I was stunned, I really was. I never though I'd see the day where you have recapitulation of development in a dish."

If the technique, published today in Nature1, can be adapted to human cells and proved safe for transplantation — which will take years — it could offer an unlimited well of tissue to replace damaged retinas. More immediately, the synthetic retinal tissue could help scientists in the study of eye disease and in identifying therapies.

The work may also guide the assembly of other organs and tissues, says Bruce Conklin, a stem-cell biologist at the Gladstone Institute of Cardiovascular Disease in San Francisco, who was not involved in the work. "I think it really reveals a larger discovery that's coming upon all of us: that these cells have instructions that allow them to self-organize."

Read more here: Stem Cells make 'retina in a dish'
 

bubbatentoe

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depends on which type of stem cells were used.
post birth human placenta based= probably OK if the mother said so.
aborted human stem cells = not cool.

mouse stem cells cannot be used in humans. so it's just theoretical research.

scientists are doing research anyway in the hope that the world will agree to using aborted human stem cells instead.

is it wrong to kill a 4 year old girl so we can use her cells? obviously.
is it wrong to kill the same girl 4 1/2 years earlier?

makes you think?
 

Fader4

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depends on which type of stem cells were used.
post birth human placenta based= probably OK if the mother said so.
aborted human stem cells = not cool.

mouse stem cells cannot be used in humans. so it's just theoretical research.

scientists are doing research anyway in the hope that the world will agree to using aborted human stem cells instead.

is it wrong to kill a 4 year old girl so we can use her cells? obviously.
is it wrong to kill the same girl 4 1/2 years earlier?

makes you think?

an aborted fetus is not a person, and obviously killing people and aborting

fetuses for the sake of harvesting their useful bits is not cool but if someone dies or a

fetus is aborted i see no problem with harvesting stem cells for example, provided the

appropriate permission is obtained of course, its not too different from organ donation

in my view​
 

Techne

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It is not too difficult to with mouse embryonic stem cells. These guys used mouse embryonic stem cells and they demonstrated (from the article) "that optic-cup morphogenesis in this simple cell culture depends on an intrinsic self-organizing program involving stepwise and domain-specific regulation of local epithelial properties." In other words they knew a lot about the developmental program (obviously) of mouse embryos and used a special cocktail of growth factors at specific times to activate the molecular program for retinal development. Fascinating work.

The science has come a far way and scientists are able to generate stem cells from fully differentiated cells (basically by rebooting the cells back into a "stem cell status") thus negating the need to work with embryonic stem cells. The procedure is more difficult and expensive and not as reliable as the original stem cells so there is still a need to work with embryonic stem cells.

depends on which type of stem cells were used.
post birth human placenta based= probably OK if the mother said so.
aborted human stem cells = not cool.

mouse stem cells cannot be used in humans. so it's just theoretical research.

scientists are doing research anyway in the hope that the world will agree to using aborted human stem cells instead.

is it wrong to kill a 4 year old girl so we can use her cells? obviously.
is it wrong to kill the same girl 4 1/2 years earlier?

makes you think?
The problem with working with human embryonic tissue is the definition of a "person" and when something becomes... well a person. Terminating a person is just another name for killing a person, thus if one is willfully killing a person without justification it becomes murder. Unless the question of "when" something is or becomes a person is answered in an objectively valid manner (not just some subjective law in whatever state here or there or wherever), abortion and human embryonic stem cell research will remain controversial.
 

TheHiveMind

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appropriate permission is obtained of course, its not too different from organ donation

What he said.

The ones who are complaining about stem cell research aren't against playing with stem cells, they are just against abortion, and man playing "God".
If someone doesn't want to reap the benefits of stem cell research then they don't have to, but many people do.
 

Techne

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What he said.

The ones who are complaining about stem cell research aren't against playing with stem cells, they are just against abortion, and man playing "God".
If someone doesn't want to reap the benefits of stem cell research then they don't have to, but many people do.
It is more complicated than this... obviously.
 

Fader4

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It is more complicated than this... obviously.

its not too complicated

The loudest protesters against stem cell research are religious nut jobs, these people the enemies of science and human progress.
 

Techne

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its not too complicated

The loudest protesters against stem cell research are religious nut jobs, these people the enemies of science and human progress.
Errr... silly generalizations aside... the issues are obviously more complex.
 

Ronjay

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depends on which type of stem cells were used.
post birth human placenta based= probably OK if the mother said so.
aborted human stem cells = not cool.

mouse stem cells cannot be used in humans. so it's just theoretical research.

scientists are doing research anyway in the hope that the world will agree to using aborted human stem cells instead.

is it wrong to kill a 4 year old girl so we can use her cells? obviously.
is it wrong to kill the same girl 4 1/2 years earlier?

makes you think?

Um, why? Makes no sense to me. It's fine to harvest cells from a still birth but not from an aborted foetus. Why?
 
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