Alternatives: First 3D-bioprinted Wagyu steak...
Alternatives

First 3D-bioprinted Wagyu steak unveiled

Imago / ZUMA Wire
Wagyu steak, known for its fatty textures, could soon be coming out of the 3D printer instead of pasture.
Wagyu steak, known for its fatty textures, could soon be coming out of the 3D printer instead of pasture.

JAPAN, Osaka. Researchers at Osaka University use 3D-bioprinting to create structured cultured meat like the complex texture of Wagyu beef, which may provide an environmentally friendly and sustainable method for producing cultured meat alternatives.

Scientists from Osaka University used stem cells isolated from Wagyu cows to 3D-print a meat alternative containing muscle, fat, and blood vessels arranged to closely resemble conventional steaks. This work may help usher in a more sustainable future with widely available cultured meat. Currently, the available “cultured meat” alternatives only consist primarily of poorly organized muscle fiber cells that fail to reproduce the complex structure of real beef steaks. Now, the team of scientists led by Osaka University have used 3D-Printing to create synthetic meat that looks more like the real thing.

a Assembly schematic- (right) based sarcomeric α-actinin (blue) and laminin- (brown) stained image (left) of the commercial meat. It is assumed that the diameters of the fibrous muscle, fat, and vascular tissues are about 500, 760, and 600 µm, respectively. Scale bar, 1 mm. b, c Optical images of the cultured steak by assembling muscle (42 ea.), fat (28 ea.), and vascular (2 ea.) tissues at (b) the top and (c) cross-section view of the dotted-line area. Muscle and vascular tissue were stained with carmine (red color), but fat tissue was not. Scale bars, 2 mm.

Method creates tailor-made structures

“Using the histological structure of Wagyu beef as a blueprint, we have developed a 3D-printing method that can produce tailor-made complex structures, like muscle fibers, fat, and blood vessels,” lead author Dong-Hee Kang says. To overcome this challenge, the team started with two types of stem cells, called bovine satellite cells and adipose-derived stem cells. Under the right laboratory conditions, these “multipotent” cells can be coaxed to differentiate into every type of cell needed to produce the cultured meat.

Individual fibers including muscle, fat, or blood vessels were fabricated from these cells using bioprinting. The fibers were then arranged in 3D, following the histological structure, to reproduce the structure of the real Wagyu meat, which was finally sliced perpendicularly, in a similar way to the traditional Japanese candy Kintaro-ame. This process made the reconstruction of the complex meat tissue structure possible in a customizable manner.

“By improving this technology, it will be possible to not only reproduce complex meat structures, such as the beautiful sashi of Wagyu beef, but to also make subtle adjustments to the fat and muscle components,” senior author Michiya Matsusaki says. That is, customers would be able to order cultured meat with their desired amount of fat, based on taste and health considerations.

Source: Osaka University
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