EMBL Grows Complex Beef Tissue From Single Cell Source
Researchers have grown bovine tissue containing muscle, nerves and blood vessels from embryonic stem cells in 15 days, a step toward more realistic
Scientists at EMBL Barcelona have grown bovine tissue containing muscle fibres, neurons and blood vessel networks from a single population of embryonic stem cells. The work, published in Nature Communications, bypasses the separate cell preparation and assembly steps typical of structured cultivated beef production.
Most cultivated meat relies on adult stem cells from cow biopsies. These cells have limited division capacity and can only become a narrow range of tissue types, making it hard to recreate a real cut's cellular mix. Embryonic stem cells divide indefinitely and can turn into many cell types without genetic modification, which could simplify regulatory approval.
Protocol Skips Manual Assembly
The new protocol takes 15 days and uses no animal serum. By adjusting the growth factors added to the same starting cells, the team produced muscle fibres, blood vessel networks and neurons simultaneously. The cells arranged themselves into small tissue aggregates without needing manual assembly.
Marina Sanaki-Matsumiya, a former postdoctoral fellow at the Ebisuya Group, explained the significance. "One of the biggest challenges in cultivated meat is reproducing the complexity of real tissue," she said. "Instead of growing each cell type separately and assembling them afterwards, we showed that embryonic stem cells can develop together and self-organise, mimicking real tissue development."
Cost and Scale Remain Barriers
The tissue aggregates are currently about 0.6 mm across. Cost is a significant barrier, with the authors estimating the price of one small aggregate at between €0.39 and €0.99. This cost is driven mainly by growth factors and reagents. The method also still uses Matrigel, a mouse-derived material that would require an animal-free replacement for food applications. The team has filed a patent on the approach.
Miki Ebisuya, former Group Leader at EMBL Barcelona, emphasized the work is a proof of concept. "The tissue we generated is still very small," she stated. "To produce something resembling a steak, we will need much larger tissues with more mature blood vessel networks that can support continued growth."
The research adds to growing interest in using pluripotent stem cells as a starting point for structured cultivated meat. A separate team reported in Nature Communications in March that it had directed porcine stem cells toward muscle, fat and blood vessel cells, producing tissue with a texture comparable to conventional pork.
