As the Smithsonian notes, "It won't be long before surgeons routinely install replacement body parts created in the laboratory. ... Anthony Atala works in the body shop of the future. ... he and his colleagues use human cells to grow muscles, blood vessels, skin and even a complete urinary bladder. Much of the work is experimental and hasn't yet been tested in human patients, but Atala has implanted laboratory-grown bladders into more than two dozen children and young adults born with defective bladders that don't empty properly, a condition that can cause kidney damage. The bladders were the first lab-generated human organs implanted in people. If they continue to perform well in clinical tests, the treatment may become standard not only for birth defects of the bladder but also for bladder cancer and other conditions. ... Regenerative medicine's once-wild ideas are fast becoming reality. Late last year, Organovo, a biotech company in San Diego, began distributing the first commercially available body-part printer. Yes, you read correctly: a printer for body parts. Using the same idea as an ink-jet printer, it jets laser-guided droplets of cells and scaffold material onto a movable platform. With each pass of the printer head, the platform sinks, and the deposited material gradually builds up a 3-D piece of tissue. Regenerative medicine laboratories around the world have relied on the printer to generate pieces of skin, muscle and blood vessels. Atala's lab has used the technology to construct a two-chambered mouse-size heart in about 40 minutes."

View the Article Under Discussion: http://www.smithsonianmag.com/specialsections/40th-anniversary/97123514.html

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