Nature research has brought pig brains back to life, will the definition of death be rewritten?

On April 18, the cover of Nature announced the latest research from Yale University: pig brains were resurrected after 4 hours of decay and maintained for at least 6 hours. Using a careful device called "Brainex", artificial blood is infused into the pig's brain through the arteries, and after 6 hours of continuous operation, the results of the trial are astounding.

According to the study, in addition to their vascular layout, neuronal synapses and immune responses were also briefly awake. Studies have shown that brain tissue is not damaged immediately and permanently within a few minutes of ischemia, but rather a gradual process of decay that can be delayed, contained, or even reversed. This invention will help develop new ** such as stroke and Alzheimer's disease, but after all, where is the boundary between life and death in the future?

This study may raise deeper philosophical and moral questions.

According to acquaintances, a team led by scholars from Yale University in the United States exercised a system called brainex in this study, which exercised an extraordinary solution that can mimic the blood reincarnation of pig brain. The team networked 32 pig brains from the slaughterhouse, and connected some of the pig brains to the Brainex system four hours after the pigs were slaughtered, and one for six hours in a row.

Efficacy invention, these pig brains can be "revived" by the department. Some brain cells can get the results of the foundation from scratch, and the activities, such as the results of the same blood cycle, are restored at a certain level, some neural activities are reproduced, and the metabolism of the pig brain becomes active again.

Corresponding author of the complaint, Nenad Sestein, a professor at Yale University, said: "Our attempt to confess that cell decay is a slow process, and that some of the pace may be delayed, maintained, or even reversed. ”

But the research staff exaggerated that this is still far from the real "resurrection" of pig brains. The EEG measured the efficacy performance, and the pig brain did not show the whole EEG related to consciousness, cognition or other higher-order brain outcomes during the whole attempt, that is, these pig brains did not have a regular consciousness. In other words, the attempt only made the pig brain regenerate the necessary level of activity at the cellular level, but did not make the pig brain as a whole regenerate the results.

The team hinted that it was unclear whether the skill could be applied to the human brain, which had not been dying for a long time, due to the lack of human blood in the extraordinary solution attempted.

As much as possible, the research staff thought that if this skill matured, it would be very costly to use it in the future. The Brainex system can be used to help study the structure and results of the brain of large mammals, to find the cause of brain damage in certain environments, and to test the effects of new drugs on brain structure.

"The brainex system is formulated to provide a shield for cell infusion, which may or may be applied to diseases such as stroke in the future," Sestein said. ”

Resurrection is still in the research stage, and conclusions cannot be drawn so early.

Even if he comes back to life, is his memory still his memory? If there is any damage, it is not a real resurrection.

If there is any damage, it is not a real resurrection.

It can delay the death of brain tissue, death will not be rewritten, and sometimes it is painful to live.

This research only brings the pig brain back to life, and it is still far from changing the definition of death.

I don't think it's that simple, after all, the human brain is really too complex.

If you don't know much about this, you probably won't be able to.

It will definitely take a long time, and the human brain is really too complicated.

I think that may happen, but it will definitely take a long time.

A ** article published in Nature reported a system that could restore cerebral circulation and some cellular function in pigs several hours after brain death. However, there is no evidence of whole-brain electrical activity associated with consciousness, cognition, or other higher-order brain functions. This approach may provide a platform for studying the whole brain, but further testing is needed to explore a wider range of applications.

The mammalian brain is extremely sensitive to decreased levels of oxygen supply; Brief interruptions in blood flow can cause rapid depletion of oxygen and energy stores, which is believed to cause neuronal death and irreparable brain damage. Some studies have already questioned whether this cascade of injuries is inevitable in the short period of time after the disruption of blood flow.

Nenad Sestan and colleagues at Yale University School of Medicine in the United States hypothesized that even after a few hours of death, certain cellular brain activity might be partially restored. To test this hypothesis, they developed the BrainEx system, which is designed to simulate pulsatile blood flow (perfusion) at normal body temperature (37 degrees Celsius).

In the study, 32 pig brains from a food processing plant were fed into the Brainex system a few hours after death. The authors observed a reduction in cell death during the 6-hour perfusion period, and found evidence of partial cellular function recovery. However, no evidence of whole-network activity or whole-brain function was found during the experiment.

These findings suggest that the brain has a stronger cellular recovery function than previously expected, and that the deterioration of cellular function after the interruption of blood flow may be a slow rather than a rapid process. It is still unknown whether it is possible to restore all normal brain function with the help of the Brainex system. The authors clarify that this effect is not evident in their current studies and that further experiments are needed to extend the perfusion time before it is possible to explore a wider range of applications.

Brief interruptions in blood flow can cause rapid depletion of oxygen and energy stores, which is believed to cause neuronal death and irreparable brain damage.

There is no noticeable effect yet, because the human brain is more complex.

After all, there is still a big difference between humans and animals.

The effect on the person is not great, and it will take a long time for the human brain to recover.

Nothing big of an impact. Because it doesn't mean that human beings can come back to life.

After all, there is still a big difference between humans and animals, and as for the impact on people, it is necessary to further progress in science and technology.

It does not mean that human beings can be brought back from the dead.

However, further testing is needed to explore a wider range of applications.

What other impact can it have, can it make people?

It will take a long time for the human brain to recover.

This problem can only be known when the experiment is truly reality.

I think there's still a long way to go.

It's hard to say, because the human brain is too complicated.

Even if it is successful, can the human brain be replaced with a pig brain?

There are still many difficulties in bringing people back to life.

Man is a very complex animal, and there is still a long way to go before he can come back to life.

It's going to be a long, long time, because the current technology is not yet mature.

The complexity of the tissues of pig brains and human brains is different, and it will take a long time.

Even if it could be achieved, it would be against human ethics.

People and animals are still different, and the specifics are only known when the experiment is successful.

I can't think that first of all, the conditions in the United States must be more harsh when the activity of pig brain is restored, and it is not as easy as we think. And the human brain and the animal brain should be a huge difference, it can be said that it is not comparable at all, after all, the IQ of human beings is much higher than that of animals, especially pigs, so this experiment only shows that it is impossible for humans to bring the brain back to life for the further development of the brain.

According to an exciting and unsettling study published in the journal Nature, American scientists successfully "resurrected" the pig brain that had been dead for 4 hours by connecting it to the Brainex extracorporeal perfusion system, restoring some circulatory and neurological functions at the cellular level, and maintaining it for nearly 36 hours. Note that it is only to maintain the activity, and it is not known how it will be.

We all know that in most countries and regions, when a person is declared brain dead, it means that the person has died. In other words, if the research on "resurrecting the brain" is mature, then once it is used in the human brain, does it mean that human beings can be resurrected from the dead?

The Massachusetts Institute of Technology, which was doing a technical evaluation of the technology at the time, said: "Billions of neurons are healthy and functioning ......."But there is no evidence that the detached pig brain is alive and regained consciousness. Although these experiments failed to restore consciousness, they questioned the ethics of this approach – and more fundamentally, the nature of death itself.

In the future, people or animals who die unnaturally may be able to use a feasible way to supply oxygen to the brain like this system, as long as the technology is in place, they can come back from the dead, the lifespan of nerve cells in the human body is very long, it is not yet known that the lifespan limit of human and animal nerve cells, if the nerve cells do not die, people and animals will even be able to live forever. The above is just speculation.

It does not mean that human beings can come back to life, it is impossible for human beings to come back to life, and if there is such a way, then the earth will be **.

The United States has successfully resurrected a pig brain, which does not mean that human beings can be brought back to life, after all, the structure of pig brains and human brains is different. However, this is not certain, maybe one day the level of technology has reached the level that can resurrect the human brain.

The resurrection of pig brains does not mean that humans can be brought back to life, because pig brains are different from human brains, and there are many uncertain factors.

The resurrection is only a pig brain, not a human brain, and it takes a lot of experiments to know that it does not mean that humans can be brought back to life.

I think resurrecting a pig's brain and resurrecting a person are two different things, and the resurrection of human beings is still very small. We have to believe in science.

Although the United States has now succeeded in resurrecting a pig's brain, it has not been experimented on humans, and if it could really be brought back to life, so many people would not be destroyed every day.

I feel that even if the United States succeeds in resurrecting a pig brain, it does not mean that human beings can be brought back to life, at least so far there is no such technology.

Personally, I think that if we want to bring human beings back to life, we still need a certain amount of scientific research, because after all, birth, old age, sickness and death are things that we all have to face.

We have to understand that the resurrection of the Americans is a pig brain, not a human brain, so we still have to wait under the subject of human resurrection.

For this experiment, we have to sort out our thoughts, and this experiment is only a pig brain, which is still far from being good for us humans.