Extended studies could provide data for future research but raise ethical concerns because of delay in burial and closure
As part of long-term efforts to address the shortage of lifesaving organs, scientists plan to extend the duration of studies in which genetically modified pig organs are transplanted into brain-dead individuals.
The move could provide crucial data to help launch clinical trials of animal-to-human transplants in living patients—but it also raises ethical and scientific challenges for the doctors and families involved.
