Website review: Msnbc.msn.com/id/18368186/site/news...
schoolofathens discovered this in Medical Science
•28 reviews since May 1, 2007
health, cancer, medical-science
•msnbc.msn.com/id/18368186/site/newsweek/
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Reviews of this website
compuveg rated 11 months ago- From the page: "That dogma went unquestioned until researchers actually looked at oxygen-starved heart cells under a microscope. What they saw amazed them, according to Dr. Lance Becker, an authority on emergency medicine at the University of Pennsylvania. "After one hour," he says, "we couldn't see evidence the cells had died. We thought we'd done something wrong." In fact, cells cut off from their blood supply died only hours later." Amazing stuff.
- sweetpotatoes rated 11 months ago
- From the page: "Biologists are still grappling with the implications of this new view of cell death%u2014not passive extinguishment, like a candle flickering out when you cover it with a glass, but an active biochemical event triggered by "reperfusion," the resumption of oxygen supply. The research takes them deep into the machinery of the cell, to the tiny membrane-enclosed structures known as mitochondria where cellular fuel is oxidized to provide energy. Mitochondria control the process known as apoptosis, the programmed death of abnormal cells that is the body's primary defense against cancer. "It looks to us," says Becker, "as if the cellular surveillance mechanism cannot tell the difference between a cancer cell and a cell being reperfused with oxygen. Something throws the switch that makes the cell die."" wow.
- Rhaxapopouetl rated 14 months ago
- Astounding discovery !
- skyboxguy rated 15 months ago
- Cool! After a heart attack, it's not the lack of blood that kills heart cells... it's the re-influx of oxygen after resuscitation. Awesome research being done.
- dorla rated 15 months ago
From the page: "But if the cells are still alive, why can't doctors revive someone who has been dead for an hour? Because once the cells have been without oxygen for more than five minutes, they die when their oxygen supply is resumed." Amazing discoveries about the dying proces in the cells can give new hope to heart attack sufferers.
- feebee62 rated 15 months ago
- how interesting is this read on about heart attack and the new reserch that has been done.
- NekuNeku rated 15 months ago
- From the page: "Consider someone who has just died of a heart attack. His organs are intact, he hasn't lost blood. All that's happened is his heart has stopped beating%u2014the definition of "clinical death"%u2014and his brain has shut down to conserve oxygen. But what has actually died?"
- tisstupid rated 15 months ago
- This is a great article that rethinks resuscitation of the heart after it has stopped. A study of the heart tissue shows that it stays alive without oxygen much longer than previously thought. The study shows that the heart tissue actually dies when it is given oxygen, and not because of deprivation. Mitochondria in the cell apparently can't tell the difference between oxygen return and cancer, and that is why they die.
Doctors are now looking for different ways to treat cardiac patients that slowly return oxygen to the heart. One involves putting the heart in a sort of suspended animation, while another induces hypothermia. - This is a great article that rethinks resuscitation of the heart after it has stopped. A study of the heart tissue shows that it stays alive without oxygen much longer than previously thought. The study shows that the heart tissue actually dies when it is given oxygen, and not because of deprivation. Mitochondria in the cell apparently can't tell the difference between oxygen return and cancer, and that is why they die.
- PcsBear rated 15 months ago
- From the page: "Biologists are still grappling with the implications of this new view of cell death -- not passive extinguishment, like a candle flickering out when you cover it with a glass, but an active biochemical event triggered by 'reperfusion,' the resumption of oxygen supply. The research takes them deep into the machinery of the cell, to the tiny membrane-enclosed structures known as mitochondria where cellular fuel is oxidized to provide energy. Mitochondria control the process known as apoptosis, the programmed death of abnormal cells that is the body's primary defense against cancer. 'It looks to us,' says Becker, 'as if the cellular surveillance mechanism cannot tell the difference between a cancer cell and a cell being reperfused with oxygen. Something throws the switch that makes the cell die.'"
