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Cloning Yields Human-Rabbit Hybrid Embryo
ralphb writes "Here is the story of scientists in China who have, for the first time, used cloning techniques to create hybrid embryos that contain a mix of DNA from both humans and rabbits. Hop on over for a look!"
My dear god, didn't any of these "scientists" ever see Night of the Lepus?!
We're all doomed!!
Mike
Finally, babies with a healthy appetite for sex
Be wary of any facts that confirm your opinion.
China trying to compete with Hugh and create their own Playboy Bunnies? Not to mention the potential for pleasure, knowing how rabbits multiply....
Tequila: It's not just for breakfast anymore!
Welcome our new fuzzy over...nevermind.
Bah, what a trivial story. Let me know when they can make a monkey with four asses. THEN, I'll be impressed!
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mix of DNA from both human and rabbit
Well, not exactly. The cell DNA was human. Only the mitochondrial DNA was from rabbit.
I'll do it for cheesy poofs.
I for one welcome our new human-rabbit hybrid masters.
I will remind them that I could be useful in rounding up people to toil in their underground carrot mines.
Be you Admins? nay, we are but lusers!
This is just the sort of thing that will catch the attention of do-gooder congressmen and get things like cloning research completely banned...If they do things like this, they should keep it quiet, not get it out into the mainstream of public opinion where people can jump (or maybe hop-hop-hop) to conclusions and phone their congressman.
Don't they know that adding human DNA to rabbit embryos is a crime against nature? They should abort babies for those stem cells, the way God intended.
The vast majority of the DNA in the embryos is human, with a small percentage of genetic material -- called mitochondrial DNA -- contributed by the rabbit egg. No one knows if such an embryo could develop into a viable fetus, though some experiments with other species suggest it would not.
The DNA that they put into the human cells is not DNA which determines physical charateristics. It's mitochondrial DNA, which is found in the cells' mitochondria. These little organelles of the cell basically burn sugar to make energy usable for the rest of the cell. There is a lot of evidence suggesting that the mitochondria found in all human cells was actually a seperate organism that became co-dependent with the cells in which they lived. Interstingly enough, mitochondiral is almost totally unaltered with a new generation, and is always passed down through the female of the species because the sperm cells typically have very few or a negligible amount of mitochondria. i.e. You have the same mitochondrial DNA as your mother and all your siblings, and she has all the same as her mother and so on down your family tree.
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Wizard: It's a horrible beast.
King Arthur: What, you mean behind the bunny rabbit?
Wizard: It IS the bunny rabbit?
Well, there's spam egg sausage and spam, that's not got much spam in it.
Judgeing from the artical they might have found a better way to get stem cells for research. However, now instead of having to deal with just people that are anti-cloning or anti-stem cell research, you would also have to deal with the animal rights activists because of the retrevial of the eggs, and the undertermined status of the cells after they are created.
So in the short run it is posibly a better way to get stem cells, in the long run it will raise alot of ethical concerns, as well as the undermined nature of the cell - in short we don't know if they are "true" stem cells in their ablity to grow into any organ. Also, if they do have the potenital to become any organ, we don't know how the human body would react to the foegin DNA (the rabit mitocadria)
When are they gonna stop fooling around and start engineering Carmen Electra clones that have a thing for network admins...
RTFA and you'll find the cells used for the DNA were a mix of rabbit skin and human foreskin. Imagine explaining that when your long-eared, buck-toothed teenager asks "Daddy, where do babies come from?"
When I am king, you will be first against the wall.
every time you bang your head you become a mass murderer?
or would you say it's a multiple suicide?
either way, I'm definitely going to hell, right?
I don't claim to be a DNA expert but I'll bet the people opposing these kinds of exparaments know even less about DNA than I do.
Somewhere I've read that we share most of our DNA with all the other members of the animal kingdom and indeed we share a lot of DNA with every living thing.
Some of these exparaments are "pure research" and others are "applied research." In pure research you do the exparament and then look to see where it took you. In applied research you have a pretty good idea of where you are going and are pretty much conducting the exparament to verify your theory. In either case, there really is a goal to the research and I'll submit that the goal is usually good for humanity.
Without this kind of research we would miss out on opportunities to cure disease, treat birth defects and, all sorts of other good things. But, there is something even better that comes from this research. We gain a greater understanding of the world we live in. We add to humankinds knowlege base. Without doing this we will fail to advance and the next century will look like the last. When that happens there is little doubt that we will have started to slide down the road to extinction becuase we will exhaust vital resources.
Did anyone notice the advertiser links at the bottom of the page for Latest Stem Cell Therapy and Dwarf Rabbit?
Talk about keyword advertising gone awry!
As for rabbits... couldn't they have picked a cooler species to intermix with? Wolves, cheetahs (fast sprinters for the Olympics!), bears... hmph. Definitely not primates though... anyone seeing 28 Days Later should put the kibosh on that one.
I'd have a personalized plate on my car, but "toxic bachelor" won't fit into 7 letters.
So when are they going to cross ninjas with turtles?
===== Murphy's Law is recursive. =====
Now we finally know why Anya was so afraid of rabbits... She saw their future as our masters...
In other words, this IS important research, that has the potential of providing important material for research projects that might take medical science huge leaps forwards.
The furry crowd must be mighty yiffy over this little development. :)
Of course... they're mostly yiffy all the time.....
"Times have not become more violent. They have just become more televised."
-Marilyn Manson
This kind of knee-jerk 'this is bad/immoral/whatever' comment, even though you clearly didn't finish (start?) reading the article is exactly the kind of piss-poor commentary that prevents science doing good.
J.
You're only jealous cos the little penguins are talking to me.
For example, if a human embryo with three of a given chromosome is formed, depending on which chromosome it forms on, the embryo may either fail to develop past the 8 cell stage, or develop into a 10 week fetus and die, or develop longer and die, but never become viable outside the womb. Down's syndrome is unique in that it and sex chromosome triploidies are the only triploidies that are compatible with life. Other triploidies result in miscarriage or failure to implant.
Unfortunately, I had to learn about this the hard way.
It's not wasting time, I'm educating myself.
Wow! The results are impressive!
Chinese scientists announced that now they'll focus research in catgirls.
Prescriptive grammar:linguistics
if the US wasn't strictly trying to control embryonic stem cells for research, then there wouldn't be a demand to make a hybrid source for embryonic stem cells.
america (currently) leads because we (usually) have the foresight to keep barriers out of the way of technological progress. we have slowly overcome nearly every 'religious' boundary by slowly letting people become accustomed to the way this medical technology -improves- life. each time they are accused of wanting to 'play god'. scientists grit and bear the well-intentioned but factually ignorant viewpoint until slowly the advances are accepted.
i'm not saying that we throw our morals to the wind and race to immortality and superhuman hybrids - just that we redirect our skepticism. are we really trying to play god? or are we just trying to preserve and extend life, to ease pain and suffering, and to advance as much of our species as we can, without hurting anyone? instead of just levelling opposition to every potential breakthrough because we're 'playing god' - can't we just look for a second at what the facts are?
embryonic stem cells are being harvested from aborted fetuses. fetuses that were legally terminated and currently, are waste. by banning science from using this unfortunate situation to the best of their ability, people are ensuring that absolutely no good comes from the situation.
if lives can be saved by studying those who have left - then why in the world would we stand in the way of that? religious opposition in the 19th and early 20th century maintained that if we allowed study of cadavers or donation of organs that people would be killed and abducted and harvested by notorious individuals in the name of 'science'. but that did not happen. nor will people go out of their way to abort fetuses just so they can get stem cells. scientists are not growing fetuses to harvest stem cells.
this unfortunately ignites the whole abortion debate, which i doubt will ever be resolved. but legally, if I, as next of kin, have the right to determine whether the body of a loved one is to be donated to science; why shouldn't these mothers who exercised their legal right to terminate their pregnancies, also have that same legal right to donate?
// "Can't clowns and pirates just -try- to get along?"
Ok, I was almost down to the bottom of the page moderating, and had to back out to respond to this point.
You have come close to hitting on the quintessential question behind all of the debate.
What makes a human a human?
Arguably, the most important criteria for being human is awareness... consciousness.
Here's a rather graphic gedanken:
Shave off all your hair... are you still human? What if you amputate your arms and legs? How about body organs? Artificial heart, kidney dialysis, iron lung, etc... Take this beyond what is possible with modern day science... brain in a vat. Quality of life has certainly decreased dramatically! However, the brain is still thinking, the software of mind is still running. What if it were possible to run the software on other hardware? Sure, cyberpunk has beat this topic to death... but I certainly don't consider my brain to be me! To quote Rene Descartes: "cogito ergo sum". Nothing else is relevant... software is everything (yeah, I'm a programmer ;-) )
Unfortunately, science has not been able to answer the question of when during development the spark of consciousness begins.
Can we agree that awareness requires a brain? Can we agree that this brain needs to be working... ie. the synapses are firing, neural potentials exist?
If so, then consciousness must begin sometime between 4 and 6 months of development.
This experiment was limited to 14 days of development. This is the point when cells begin to differentiate. Clearly this is long before a brain and the potential for consciousness arises.
Really, this is an ideal stop-gap measure. If by mixing mitochondrial DNA of another species with human nuclear DNA you achieve a development term necessary for medicinal purposes, and at the same time insure development self-aborts prior to brain development, then you end up with a self regulating procedure that prevents the accidental creation of a human consciousness.
It appears Ockham lost his razor and grew a beard.
First off, they had to remove virtually all the rabbit nuclear DNA because if you do not do this and simply fuse two cells (say a human cell and a rabbit cell) with intact DNA, almost invariably, the human DNA is lost. The cells dump extraneous DNA and it just happens that most often, it is the human chromosomes that get dumped.
Second, this is merely a gradation of "chimera" beyond that which is commonly called a "transgenic". The later is a long-used basic tool in molecular biology/developmental research. There are innumerable extant mouse-human "chimeras" out there, just as there are Drosophila-human, yeast-human, yeast-E. coli, E. coli-yeast, etc, etc, etc, transgenic (chimeras). Normally, what is transfered in these cases are individual genes, though short chromosomal segments can be transfered as well. This article refers to a chimera in which it is merely the shell that contains the DNA (the cell) that is changed from native to alien species. You could likely get by with a viable cell with a partial mix of rabbit genes in human cells and vice versa, so long as the proteins encoded by the genes are homologous enough to share the same functions and helper proteins.
What would be cool, in my opinion, would be to do a human-bird hybrid in which the bird cell contains only human genomic DNA but the cells retain avian mitochondria - with a little transgenic work done to replace the human mitochondrial genes in the nuclear chromosomes with their avian counterpart. Why? IF (a relatively big if) the mitochondria can properly function in concert with the rest of the human DNA, you might produce a long-lived cell line or, if you let it go to term, a longer lived human. Why? This is based on the oxidative damage/free radical theory of aging: bird mitochondria are much more efficient than human mitochondria on the level of producing energy (ATP) vs production of damaging oxygen radicals. Birds have a high metabolism and their lifespan, relative to metabolic rate (one of the supporting observations for the free radical theory of aging), is unusually long. In general, a higher metabolic rate equates to a correspondingly shorter lifespan. The predominant source of damaging radicals is mitochondria by far. So, if you replace the human mitochondria with super-efficient, low radical producing bird mitochondria, you could end up with a human with an extended lifespan (to unknown extent) if the free radical theory of aging is largely correct.
Such a person would be no less human than anyone else, their mitochondria would simply be that of a bird rather than a human. Big deal. Mitochondria are alien themselves, afterall. They are the remnant of the fusion, hundreds of millions of years ago, between an anaerobic-type cell and a cyanobacteria-like aerobic bacteria. Once upon a time, then, a chimera was formed based on a semi-parasitic melding of two separate species. Each gains benefit from the other and ultimately, you end up with aerobic eukaryotic cells that makes humans, dogs, birds, insects, reptiles, etc.
In Bushworld, they struggle to keep church and state separate in Iraq as they increasingly merge the two in America.
These probably would not survive gestation. There are factors spread out in a specific manner in an egg which tell the various parts of the embryo what to become, and when. Imagine the egg as a bag of concentration gradients, going along at least three axes, several gradients per axis. As the cell divides, these become compartmentalized into individual cells. You now have scores of little bags with codes to each one, the code being the concentration of several factors (factors ABCDE having respective concentrations of 4,3,1,2,6 or 5,4,0,8,9). At certain times, these factors come together and give signals that tell that cell or group of cells to become a certain progenitor tissue type. Differentiation goes further after that, with cells "deciding" what to become based on what kind of cell is nearby.
Many of the signals would be similar between human and rabbit, but probably not enough to make a viable human, or viable anything else for that matter. The rabbit DNA control sequences targeted by the factors that are in the egg would probably be too different from the sequences with similar function in human DNA. This would permit the embryos to survive through several divisions, and probably form simple embryos (mammals are very similar until the fetus stage....even then, it's hard to tell sometimes). But it would probably never make it through gestation. Probably.
There is a reason for everything. Sometimes that reason just sucks.
Oh great, now Bugs Bunny will also be able to run for Governor of Califorina.
Table-ized A.I.