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Scientists restore some activity in the brain of dead pigs



Scientists say that the brain of animals and humans can risk serious damage without blood flow and oxygen. Researchers say they were able to restore some activity in the brains of four-hour-old pigs.

Nenad Sestan of the Yale School of Medicine at New Haven, Connecticut, was among the researchers. According to medical definitions, the brains are not "living brains". He added that the brains could not think or feel anything. However, the researchers found that cells in brains that have lost their supply of blood and oxygen could survive longer than scientists had thought.

They said the research could lead to new medical treatments for stroke and other medical conditions. It also provides a new way to study the brain and how drugs work in it.

The research was mainly supported by the National Institutes of Health and published this week in the journal Nature.

  A pig named Yossi departs

A pig named Yossi grazes on the "Freedom Farm" in Moshav Olesh, Israel, March 7, 2019. Yale scientists who aspire to a brain study were able to study the basic to restore cellular porcine brain activity hours after her death. 19659008] The 32 brains in the study came from pigs killed for food. The scientists put the brain in their laboratory in a device. Four hours after the animals died, they began to pump a specially developed blood substitute through the organs.

After six hours, the researchers found that individual brain cells in one area of ​​the brain still retained important details of their structure. And when they sent electrical signals to the brain, the cells responded in a way that showed viability .

The scientists examined the artificial blood before and after entering the treated brain. They found that brain cells absorbed blood sugar and oxygen and produced carbon dioxide: a signal that they are working. They also found that blood trails in treated brains responded to a drug that makes them broader.

However, the brains did not show large amounts of activity that would be a sign of consciousness . The scientists said the restoration of consciousness is not the goal of the study. And they do not know if it's possible.

The scientists said they did not intend to test their methods on human brains. However, they are trying to treat the study for more than six hours.

Christof Koch is president of the Allen Institute for Brain Science in Seattle, Washington. He did not participate in the study, but said he was surprised by the results, especially since they came from such a large animal.

He said the study could broaden our knowledge of "people in the land of life" after an overdose of drugs, suggesting it could also be helpful in treatments if the brain was not enough for an hour or two

Koch said the results of the study also raised questions about the widespread definition of death – the irreversible loss of brain activity

I am Jonathan Evans.

Hai Do has adapted this story for VOA who learns English based on an AP Report Mario Ritter was the editor.

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______________________________________________________________ [19659021] Words in this story

restore -v. to put something back in its previous state

viability -n. able to live or develop into a living entity

artificial -adj. not natural, made by humans

absorb -v. Take something like a fluid

consciousness -n. the state to be awake and aware


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