That humans can engineer muscle tissue in petri dishes is extraordinary, but it isn't enough to heal serious bodily injuries. But a new study published in Proceedings of the National Academy of Sciences today brings us one step closer to orthopedic surgery bliss, because scientists were able to engineer mouse muscle that was just as strong as native muscle — and that could heal itself after injury. To engineer the tissue, scientists mixed gelatin-like hydrogel matrix with cells from newborn mice called progenitor cells. These cells can take on many different forms, but have lost the ability to replicate indefinitely the way stem cells can.
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