As the waiting lists for organ replacements grows by the day scientists have long been trying to find ways for patients to get the organs they need to save their lives. There simply is no other way for someone who needs a new heart or lung to go without, they will die without the life-saving donation. This has always meant taking organs from living relatives if the needed replacement is not vital to survival (like a kidney or even a lung), or from the recently deceased in the case of something that is needed to live (like a heart). Of course that makes these all the more difficult to procure.
Here we step from reality though into science fiction. Biologists have reported that they can now replace a patient’s failing organs with ones taken from the person’s own cells and grown within an animal. This could possibly improve the chances of not having the organ be rejected by the body after transplant because it is developed from the person’s own stem cells.
The organs would be grown in large animals like pigs that are chimeras, animals composed of two different genomes. This is made by implanting human stem cells into the pig embryo early, meanings the animal would be made of a mixture of human and pig cells.
The question then becomes the ethics of all this. What does it mean when an animal also contains human cells? Is it entitled to human rights? How will these animals be kept? What is their future after they’ve made the organ needed for the transplant? It is unclear what the future of this project will bring, but surely something we should keep an eye on.