The brain of dead pigs may be partially revived within hours of the animal's death, US scientists said. They were able to relive the cellular functions in pigs' brains for several hours after their death. As they say, this will not change the view of death, but the discovery will in all likelihood contribute to more effective treatment after a heart attack or stroke.
Scientists studied the brain of 32 animals slaughtered four hours earlier. In some brains, synthetic blood has been released, containing oxygen, nutrients, and various chemicals to slow down cellular degeneration. This fluid flowed through the brain for six hours. A controlled fluid that did not contain these substances fell in a certain number of brains, it was reported STA.
In the brain that received synthetic blood, basic cellular functions were restored. The structures of the blood vessels were restored and individual processes, such as immune responses, were observed. This did not happen in the brain that did not receive synthetic blood. As reported Guardian, the brain that received synthetic blood after six hours was in a better state than the brains of the pigs that died an hour ago.
The research does not change the view of death
Neuroscientists at Yale University, who published the study in Nature, emphasize that the partially revived pig brain showed no signs of consciousness. For example, they did not realize that the various parts of the brain would send signals, so this finding does not change the definition of death, he reportedThe Guardian
If researchers detected this type of activity, they should have stopped researching, as many ethical problems would arise. As explained by the research leaderNenad Sestan, the staff was also ready for this scenario. In that case, we would lower brain temperature and use anesthesia to stop brain activity."The main conclusion is that the cells die later than we thought so far"explains Croatian neuroscientist Nenad Sestan.
For the time being, the methods still can not be used in human brains, Sestan points out: "These are not working brain, but active brain cell".
Above all, as he explains Christine Grady, which addresses the ethical issue of such experiences, there are clear and rigorous rules that scientists and doctors can do with a person after death. If they wanted to test this kind of method on people, they should change the rules.
New hope for treatment after heart attack and stroke
The study showed a new way to prevent brain cells from suffering irreparable damage if the blood stops circulating and even how to maintain certain cellular functions. Sestan explains that the results exceeded expectations: "When we began this research, we never imagined that we would reach these conclusions. "
The team of researchers is convinced that a future approach could be a new way to search the brain and help research and test new ways to treat poisoning and other medical conditions that result in a blood flow to the brain, causing cell death . I could also contribute to the clarification of Alzheimer's disease.