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“Minibrains” May Soon Include Neanderthal DNA

Brain organoids engineered to carry the genetic material could reveal how our brains are similar to and different from those of our closest relatives.

May 14, 2018
Ashley Yeager

ISTOCK, HALAMKAHuman stem cells edited to contain Neanderthal DNA will soon be grown into “miniature brains,” The Guardian reports.

“We’re seeing if we can find basic differences in how nerve cells function that may be a basis for why humans seem to be cognitively so special,” Svante Pääbo, who directs the genetics department at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, where the experiments are being performed, tells the publication.

Pääbo and his colleagues have already extracted Neanderthal genes for the development of the skull and face and inserted them into mice. They have also extracted genes for pain perception from Neanderthal DNA and edited them into frogs’ genomes to determine whether the pain thresholds between humans and Neanderthals differ, according to The Guardian. Now, the researchers want to do the same with three genes linked to the growth of neurons in organoids.

Neanderthals, recent research revealed, drew cave art, buried their dead, and had bigger brains than humans. So by testing how the Neanderthal genes work in brain organoids, the scientists can determine if connections between nerve cells, electrical activity, and early brain development are similar to modern humans.

“We want to know … is there something hiding there that really sets us apart?” Pääbo says. “Is there a biological basis for why modern humans went on to become millions and eventually billions of people, spread across the world and have culture?”

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