Re: News: Naked mole rats may hold clues to surviving stroke.

On Dec 1, 8:56 am, All-Seeing-I <allseei...@xxxxxxx> wrote:
On Dec 1, 8:39 am, Boikat <boi...@xxxxxxxxxxxxx> wrote:





On Dec 1, 7:59 am, All-Seeing-I <allseei...@xxxxxxx> wrote:

On Nov 30, 4:20 pm, Ye Old One <use...@xxxxxxxxx> wrote:

Naked mole rats may hold clues to surviving stroke

http://www.eurekalert.org/pub_releases/2009-11/uoia-nmr113009.php

Blind, nearly hairless, and looking something like toothy, plump, pink
fingers, naked mole rats may rank among nature's most maligned
creatures, but their unusual physiology endears them to scientists.

Two University of Illinois at Chicago researchers report in the Dec. 9
issue of NeuroReport (now on-line) that adult naked mole rat brain
tissue can withstand extreme hypoxia, or oxygen deprivation, for
periods exceeding a half-hour -- much longer than brain tissue from
other mammals.

The findings may yield clues for better treatment of brain injuries
associated with heart attack, stroke and accidents where the brain is
starved of vital oxygen.

John Larson, associate professor of physiology in psychiatry, and
Thomas Park, professor of biological sciences, studied African naked
mole rats -- small rodents that live about six feet underground in big
colonies of up to 300 members. The living is tight and the breathing
even worse, with the limited air supply high in carbon dioxide and low
in oxygen.

The air they breathe is so foul it would be fatal or lead to
irreversible brain damage in any other mammal, Larson and Park said.

But naked mole rats studied were found to show systemic hypoxia
adaptations, such as in the lungs and blood, as well as neuron
adaptations that allow brain cells to function at oxygen and carbon
dioxide levels that other mammals cannot tolerate.

"In the most extreme cases, naked mole rat neurons maintain function
more than six times longer than mouse neurons after the onset of
oxygen deprivation," said Larson.

"We also find it very intriguing that naked mole rat neurons exhibit
some electrophysiological properties that suggest that neurons in
these animals retain immature characteristics."

All mammal fetuses live in a low-oxygen environment in the womb, and
human infants continue to show brain resistance to oxygen deprivation
for a brief time into early childhood. But naked mole rats, unlike
other mammals, retain this ability into adulthood.

"We believe that the extreme resistance to oxygen deprivation is a
result of evolutionary adaptations for surviving in a chronically
low-oxygen environment," said Park.

"The trick now will be to learn how naked mole rats have been able to
retain infant-like brain protection from low oxygen, so we can use
this information to help people who experience temporary loss of
oxygen to the brain in situations like heart attacks, stroke or
drowning," he said.

Larson said study of the naked mole rat's brain may yield clues for
learning the mechanisms that allow longer neuronal survival after such
accidents or medical emergencies, which may suggest ways to avoid
permanent human brain damage.

--
Bob.

So. Tell me Ye Old Boob.

How did the mole rat survive in that environment before the
adaptations?

Why bother? You do not have the ability to comprehend the answers,
and would only resort to calling him or anyone that provided an answer
a "crackhead". Unless, of course, the answer was found carved onto
the surface of some 7000 year old stone tablets found in ancient ruins
in Mesopotamia. Then you would blindly accept the explaination.

Boikat- Hide quoted text -

- Show quoted text -

NO ONE can comprehend the answers because the answers are so
ambigious.

See? You lack the ability to comprehend, so you think nobody else
could. That's called "projection".


Now. Please. Put down that crack pipe.

More projection..

Throw out the stale beer next
to your mouse and keyboard.

More projection...

Get a box; Then pack up and return your
computer to Wallmart where you bought it.

You should consider that youreself, Mr. Cambrian Mammal = Trilobite.


While at Wallmart, please purchase a Straight-Jacket and put it on.

Why? I doubt I'm as fat and bloated as you. You'll just have to do
your own shopping for your own cloth.

Find one that is a pretty shade of red to match your eyes.

More projection, and I figured you to be one to wear pink.


thanks

Don't mention it. It's always a pleasure making you squeek like a
monkey. It reflects you lineage quite well. Here, have another piece
of a nanner. Nice monnnkeeey-boy.

Now, dance! Dance little monnnnkeey-boy!

Boikat

.

Relevant Pages

  • Re: Big animals, big brains - big neurons or more neurons?
    ... > nerve cells, or does it mean proportionately more nerve cells? ... > In humans, say, does variation in size of brain indicate variation in ... > of neuron count plus glial cell count - not a count of neurons alone. ... comparing primates with mammals as a whole: for mammals as a whole brain ...
    (sci.bio.evolution)
  • Re: News: Naked mole rats may hold clues to surviving stroke.
    ... naked mole rats may rank among nature's most maligned ... periods exceeding a half-hour -- much longer than brain tissue from ... adaptations that allow brain cells to function at oxygen and carbon ... some electrophysiological properties that suggest that neurons in ...
    (talk.origins)
  • Re: News: Naked mole rats may hold clues to surviving stroke.
    ... naked mole rats may rank among nature's most maligned ... periods exceeding a half-hour -- much longer than brain tissue from ... mole rats -- small rodents that live about six feet underground in big ... some electrophysiological properties that suggest that neurons in ...
    (talk.origins)
  • Re: News: Naked mole rats may hold clues to surviving stroke.
    ... periods exceeding a half-hour -- much longer than brain tissue from ... But naked mole rats studied were found to show systemic hypoxia ... dioxide levels that other mammals cannot tolerate. ... naked mole rat neurons maintain function ...
    (talk.origins)
  • Re: News: Naked mole rats may hold clues to surviving stroke.
    ... periods exceeding a half-hour -- much longer than brain tissue from ... But naked mole rats studied were found to show systemic hypoxia ... dioxide levels that other mammals cannot tolerate. ... naked mole rat neurons maintain function ...
    (talk.origins)