Researchers Identify Gene Involved in Regeneration 134
v1x writes "Researchers at the University of Utah School of Medicine have discovered that when a gene called smedwi-2 is silenced in the adult stem cells of planarians, the quarter-inch long worm is unable to carry out a biological process that has mystified scientists for centuries, regeneration."
Unfortunately (Score:2, Interesting)
Other potential applications (Score:5, Interesting)
Re:More intelligent animals (Score:3, Interesting)
Re: complex animal: all these scientists found is how to BREAK the mechanism. Like when I was 10, i could take a part out of the alarm clock (but then it failed completely). Until now most GMO's are single gene expressions. (double if you count in the antibiotic resistance, but no things cooperating)
Good News (Score:5, Interesting)
I can tell you that they would all welcome a new technology that would allow people who have lost limbs to grow them back or regenerate eyes so they could see. You underestimate the the lobbying powers of Disabled Americans. We have a great deal of influence, almost as much as the AARP and the NRA, and they both have immense clout.
Congress can ignore some of us some of the time but they can't ignore all of us all the of the time. If its proven that limbs and organs can be regenerated by activating such a gene in the human genome then mark my words we'll make them make it legal.
Re:More intelligent animals (Score:2, Interesting)
Re:Utah, mormons, god... (Score:3, Interesting)
nonsense?
Africa can certainly produce enough food to feed itself with modern sustainable farming. It's problems have been mostly civil strife and partly a global economic system that makes it financially ordained that cash-crop for sale be grown, rather than a nutritionally balanced range of crops.
The first of these problems wont be fixed by GM crops and the second would be better addressed by fixing the underlying problem rather than producing, say, rice rich in vitamin D (an incomplete solution).
The immediate downsides of GMO farming are twofold: Firstly, an enforced tithe to the patent holders annually, which cannot be escaped from or realistically negotiated for a fair price, seeing as GMO crops cannot be got rid of and cannot be obtained from a competitor. Secondly, an eggs in one-basket situation of genetic mono-culture... google for the Irish potato famine, sometime.
And thirdly (THREE downsides), an ethically fucked up situation in which people must pay for the right to work to feed themselves. Very medieval. You can be sure that African nations are not in a position to fairly negotiate with US corporations.
Related story: Mighty Mice Regrow Organs (Score:5, Interesting)
Mice discovered accidentally at the Wistar Institute in Pennsylvania have the seemingly miraculous ability to regenerate like a salamander, and even regrow vital organs.
Researchers systematically amputated digits and damaged various organs of the mice, including the heart, liver and brain, most of which grew back.
The results stunned scientists because if such regeneration is possible in this mammal, it might also be possible in humans.
The researchers also made a remarkable second discovery: When cells from the regenerative mice were injected into normal mice, the normal mice adopted the ability to regenerate. And when the special mice bred with normal mice, their offspring inherited souped-up regeneration capabilities.
Heber-Katz discovered the strain in 1998 accidentally while working with mice specially bred for studying autoimmune diseases.
She had pierced holes in the ears of the genetically altered mice to distinguish them from a control group, but they healed quickly with no scarring.
She and her colleagues wanted to find out what other parts of this strain of mice would grow back, so they snipped off the tip of a tail, severed a spinal cord, injured the optic nerve and damaged various internal organs.
The mice seem to exhibit regenerative capabilities similar to that of human fetuses in the first trimester, said Dr. Stephen Badylak, a surgery research professor and director of the Center for Pre-Clinical Tissue Engineering at the University of Pittsburgh's McGowan Institute for Regenerative Medicine.
"It offers us insight into a more fetal-like healing response, where scar tissue is minimal and regeneration is abundant," Badylak said. "It's a great model to examine healing mechanisms and use that information to see if we can stimulate the same thing to happen in people."
Heber-Katz said she will soon publish her results on digit regrowth in a peer-reviewed medical journal.