The rapid development of contemporary biomedicine has brought a lot? Impossible? Became? Maybe? Organ transplantation is no exception. Although it has been nearly half a century since human beings successfully transplanted organs, it appeared because of the scarcity of organ sources? Demand exceeds supply? . Therefore, many scientists have turned their attention to animals, hoping that animals can become donors for human organ transplantation. Pigs are the most likely candidates to provide animal organs, because pigs grow faster, the organ size is similar to that of humans, and there are fewer diseases co-infected with humans.

1. Transplanting animal organs to humans has a long history. In fact, from a historical point of view, transplanting animal organs into human bodies is nothing new. 1920, a French doctor transplanted the testicles of a monkey to an old man; 1963, chimpanzee kidney was transplanted to 13 patients; 1964, the heart of chimpanzee was transplanted to human for the first time; 1984, a baby transplanted with a baboon heart lived for 20 days; 1992, baboon liver transplantation, the patient survived for 2 months. From 65438 to 0997, an AIDS patient got better after receiving a bone marrow transplant from a baboon. From 65438 to 0997, pig fetal nerve cells were injected into the brain tissue of Parkinson's disease, and the patient survived for 7 months.

Although the transplantation of animal organs into human body can be said to be? Repeated battles and defeats? But the medical profession has also drawn a lesson from this, that is, only organ transplantation of genetically modified animals is useful. In 200 1 year, a transgenic pig heart was successfully transplanted in Nanjing Gulou Hospital, Jiangsu Province, China, which aroused strong repercussions in the biomedical field at that time.

Second, organ transplantation of transgenic animals can overcome the rejection of immune system. Defense system? It's medically called the immune system. It can identify alien species that enter the human body and repel them. Will the active defense function of the immune system resist during organ transplantation? Foreign body? And constantly attack and repel it, resulting in many transplant failures. Although the compatibility of tissue types is tested before transplantation, rejection is inevitable. Therefore, the matching of organ transplantation has always been a difficult problem. If the transgenic technology of bioengineering is applied to transfer human genes into the genetic material of pigs or other organisms, it may be possible to cultivate organs that can be transplanted without rejection, thus saving human lives. If successful, it can not only effectively solve the source of organs, but also overcome the rejection of the immune system.

Although there are still many problems to be solved in organ transplantation, its future development direction is still extremely optimistic. If the problem of xenotransplantation and gene fusion can be solved, then there is hope for animal organs to be transplanted into humans. Of course, this requires more scientists to spend a lot of research and experiments, hoping that this science can benefit mankind as soon as possible.