Let’s all take a deep breath. The lab-created “pig/human hybrid” being reported in the news this week is real, but it’s not quite the monster you might imagine. Researchers from the Salk Institute, who published their results in the journal Cell, have successfully coaxed human cells to grow inside pig embryos.
Chimeras (hybrid organisms) have always been a sticky issue both scientifically and ethically. Public opinion about this kind of science is hardly favorable, and the National Institutes of Health and other research bodies will not fund studies that involve the implantation of human stem cells into the eggs and embryos of other animals.
But many scientists, including the authors of the new paper, feel it’s important to keep doing it anyway. The first phase of the current research, which was funded by supporters of the Salk Institute, involved creating a cross between a rat and a mouse by implanting rat cells into mouse embryos. (Earlier this week, we reported on similar research in which scientists grew mouse organs inside rats, then transplanted them…
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