WASHINGTON – Ink-jet printing technology has inspired scientists to look for ways to build sheets of skin that could one day be used for grafts in burn victims, experts said.
One technique involves a portable bioprinter that could be carried to wounded soldiers on the battlefield where it would scan the injury, take cells from the patient and print a section of compatible skin.
Another uses a three-dimensional printer combining donor cells, biofriendly gel and other materials to build cartilage.
The 3-D printer was shown at work, building a prototype of an ear during a half-hour demonstration at a Washington science conference.
Hod Lipson of Cornell University in New York said it worked much like an ink-jet printer.
“It spits out plastic to gradually build an object layer by layer… after a couple of hours you end up with a real physical object that you can hold in your hand,” he said.
“Just imagine — if you could take cells from a donor, culture them, put them into an ink and recreate an implant that is alive and made of the original cells from the donor — how useful that would be in terms of avoiding rejection,” said Lipson.
“That is where we are going. Let’s see how far we can go.”
Studies using the technology in animals have shown promise, particularly with printed cartilage, which is relatively simple in its construction and is tough so it can withstand the rigors of printing.
“There are very severe limitations,” Lipson said. “We are right now limited to cells… that can handle being printed.”
Scientist James Yoo of Wake Forest University in North Carolina said his team’s approach to printing skin has shown positive results in repairing skin in mouse and pig models.
“One approach is to directly deploy cells to the wound site and the other approach is to build a tissue construct outside the body and transfer it into the body,” said Yoo.
The technology works in part via a scanner that takes a measure of the affected area and identifies the depth and extent of the injury, informing the bioprinter of how many layers of cells need to be made.
Both scientists said the advances were still in their early stages and required more research and refinement before they are ready for human patients.
“One of the challenges that we will eventually face is like anything else, when you are trying to transfer the technology into the body, how can we create and connect those tissues?” said Yoo.
“Whatever you put in the body has to be connected with the body’s blood vessels, blood supply and oxygen.”
American, Italian and Russian blast off for ISS
US, Italian and Russian astronauts blasted into space Saturday, headed for the International Space Station, in a launch coinciding with the 50th anniversary of the Apollo 11 Moon landing.
Alexander Skvortsov of the Russian space agency Roscosmos, NASA's Andrew Morgan and Luca Parmitano of the European Space Agency set off on a six-hour journey to the orbiting science lab from the Baikonur Cosmodrome in Kazakhstan at 1628 GMT.
A NASA TV commentator hailed a "textbook launch" minutes after blastoff in "sweltering" weather in Baikonur, where daytime temperatures reached 43 degrees Celsius on Saturday.
50 years ago, humanity’s first steps on another world
Fifty years ago on Saturday, American astronauts Neil Armstrong and Buzz Aldrin became the first humans in history to set foot on the Moon, an event watched on television by half a billion people.
Their lunar module, named "Eagle," touched down at 2018 GMT (4:18pm ET) on July 20, 1969.
A little over six hours later, at 0256 GMT, Armstrong placed his left foot on the lunar surface, declaring: "That's one small step for man, one giant leap for mankind."
NASA has been in overdrive for several weeks to mark the anniversary, with exhibits and events nationwide but most notably at the Kennedy Space Center in Cape Canaveral, Florida and the Johnson Space Center in Houston, Texas.
Babies born near oil and gas wells are up to 70% more likely to have congenital heart defects, new study shows
Researchers at the University of Colorado studied pregnant women who are among the 17 million Americans living within a mile from an active oil or gas well
Proximity to oil and gas sites makes pregnant mothers up to 70 percent more likely to give birth to a baby with congenital heart defects, according to a new study.
Led by Dr. Lisa McKenzie at the University of Colorado, researchers found that the chemicals released from oil and gas wells can have serious and potentially fatal effects on babies born to mothers who live within a mile of an active well site—as about 17 million Americans do.