Scientists have for the first time grown embryos that contain a combination of pig and human stem cells, in a step toward one day growing transplantable organs, a study said on Thursday.
However, the research remains at a very early stage and proved more difficult than expected, the researchers reported in the peer-reviewed journal Cell.
“This is an important first step,” said lead investigator Juan Carlos Izpisua Belmonte, a professor in the Salk Institute of Biological Studies’ Gene Expression Laboratory.
“The ultimate goal is to grow functional and transplantable tissue or organs, but we are far away from that.”
Scientists implanted adult human