It seems that this is a week for announcing significant progress in tissue engineering. You might recall that one of the groups involved in recellularization research transplanted a trachea into a human recipient a couple of years ago. The organ was from a donor, stripped of all its cells, and the remaining natural scaffold of the extracellular matrix repopulated with cells from the recipient. The end result was a transplanted organ that would not be rejected by the immune system. The same researchers have now gone one step further and successfully transplanted an entirely synthetic trachea grown from the patient's cells on an artificial scaffold - no donor organ required.
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