The next challenge is whether or not it can be done successfully with human cells.
Scientists know the body harbors trillions of such microorganisms indeed, they outnumber human cells 10 to 1.
It would be interesting to see whether the same is found with human cells.
But in test-tube experiments the mock DNA couldn't pierce the membrane of human cells.
But phenols are poisonous to human cells, too, and thus have to be neutralised.
Geron scientists now manufacture seven different types of human cells from embryonic stem cells.
The cells did not contain a strain of PERVs known to be able to infect human cells.
However, the line of attack can be perfected so that the proteins which coat human cells remain unaffected.
And he said it was theoretically possible that the drug would have the same impact on human cells.
Tests on human cells in the laboratory have also showed the mambalgins have similar chemical effects in people.
Cambridge University scientists say they have seen four-stranded DNA at work in human cells for the first time.
"Insight into yeast can give us insight into human cells, " says Cadus' Broach.
Professor Peck said scientists were attempting to duplicate the study using human cells.
Although the human cells are very good at repairing this damage, they cannot cope with high doses of radiation.
Remember the South Korean researcher who was later found to have fabricated data that he cloned human cells?
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But PrimeCell appears to be ahead of the German team because it's already moved from mice to human cells.
He added it had already been shown in mouse cells but this was the first time in human cells.
These pig cells were able to co-exist safely with the human cells for the 25 weeks of the study.
In both houses of Congress, the need to keep human cells in close contact with mouse cells worried many legistlators.
Researchers there are implanting human cells in mice to look for better ways of making vaccines against aids and hepatitis C.
In his State of the Union address, President George W. Bush advocated outlawing all use of cloning technology on human cells.
Embryonic stem cells, found only in embryos, are the only human cells that can divide to form any other type of tissue.
But cancer cells, because they are mutations of normal human cells, do not appear foreign, so are generally allowed to reproduce unmolested.
Traditionally, of course, scientists couldn't take a yardstick to the DNA-containing chromosomes contained in human cells and measure the distance between genes.
Fortunately Chiron, Sanofi-Aventis and others are avidly pursuing new, more flexible incubation techniques that will replace chicken eggs with vats of animal or human cells.
Because they are derived from human cells with human diseases, they are likely to be more effective than some forms of animal testing.
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"To get any of these advanced cell therapies into humans for the treatment of disease, we need to use human cells, " he says.
Both these experiments were done in mice but no one doubted that the same kind of biological malleability was also achievable in human cells.
Their concern was two-fold: Many fear that cultivating human cells close to mouse cells might allow animal viruses to move into the human population.
Also in Wednesday's edition of Nature, Dr. Daniel Salomon of the Scripps Institute reported that certain viruses unique to pigs can infect human cells.
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