Tiny lab-grown organs connected by an artificial blood system on a two-inch chip could greatly improve drug testing
Miniature human organs made by 3D printing could create a “body on a chip” that enables better drug testing. That futuristic idea has become a new bioprinting project backed by $24 million from the U.S. Department of Defense.
The 2-inch “body on a chip” would represent a realistic testing ground for understanding how the human body might react to dangerous diseases, chemical warfare agents and new drugs intended to defend against biological or chemical attacks. Such technology could speed up drug development by replacing less-ideal animal testing or the simpler testing done on human cells in petri dishes — and perhaps save millions or even billions of dollars from being wasted on dead-end drug candidates that fail in human clinical trials.
“The question is whether can you have a better system to test these drugs, so that you can bypass cell testing and animal testing by going straight to miniature organs,” said Tony Atala, director of the Wake Forest Institute for Regenerative Medicine in Winston-Salem, N.C.
Atala’s group has pioneered 3D printing methods that aim to build human organs with layer upon layer of cells. Their bioprinting methods lay down the cell layers along with artificial scaffolding to keep an organ’s structure intact as it takes shape — a technique that has allowed the group to make tiny, less complex versions of full-size human organs. [See Photos of the 3D-Printed ‘Body on a Chip’ System]
“We’re printing miniature solid organs: miniature livers, hearts, lungs and vascular structures (blood vessels),” Atala told LiveScience.
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