The recent news that researchers managed to grow human cells in monkey embryos divides the scientific community. Even though this experiment helps us understand cellular development better, some think that such inquiries are unnecessary. However, this is not the first time scientists made attempts to combine animal embryos with human cells.
The findings from this research were published on 15th April in the academic journal Cell. Besides this article, there are two more that report on experiments with human-animal hybrids. You can find the links to all three articles below.
The experiment in question used monkey embryos injected with human stem cells. The scientists wanted to observe the interaction between human and monkey cells as they divided in a lab dish. Out of all the chimera embryos, three survived nineteen days.
Scientists working on this project hope that hybrids like the one described above may help with medical research. That is, they expect these organisms will provide better testing subjects for drugs. Also, some speculate that they may help in growing organs for transplantation.
The Ethical Issue
There are two main issues with this experiment. First