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[EMAIL PROTECTED] (rev dan izzo) wrote in message news:<[EMAIL PROTECTED]>...
> Paul Antonik Wakfer <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> > Reply to a post on sci.life-extension, also copied to sci.cryonics and
> > the Cryonet list.
> >
> > Robert McCarty wrote:
> >
> > > Cryo is a "permanent" cellular degradation by ice crystals..
> >
> > You are completely misinformed. Even under the worst current procedures
> > all ice crystals form extra-cellularly. Cells are shrunken but not
> > ruptured. Under the best current procedures no ice crystals are formed
> > at all. The only damage is due to cyroprotectant toxicity. It is
> > currently not clear whether such damage is ultimately "fatal". Only time
> > and future medical advances will tell us that. In the meantime, work
> > continues to develop fully non-toxic cryoprotectants which still allow
> > no ice crystal formation. With funding of only $10 million per year it
> > is almost certain, IMO, that this could be accomplished within 5-10
> > years and that within 15-20 years fully reversible long-term human
> > suspended animation would be available for all who live in
> > technologically advanced countries and wish to have it. This would
> > accomplish an end to individual death from most non-accidental causes
> > since once in suspended animation one could wait as long as necessary
> > for the necessary medical advances to fix what put one there and also
> > for the life extension advances needed to rejuvenate one. In that sense
> > fully reversible long term human suspended animation would be like an
> > ambulance ride to the future.
> >
> >
> > --Paul Wakfer
> >
> > MoreLife for the rational - http://morelife.org
> > Reality based tools for more life in quantity and quality
> > The Self-Sovereign Individual Project - http://selfsip.org
> > Rational freedom by self-sovereignty & social contracting
>
>
>
> Every winter many plants and insects are frozen and revive in
> spring..some frogs freeze in winter also and thaw in spring every year
> naturally.....How else can the dead be resurrected ? May God Bless the
> resurrection of the dead (*-*)
Hi Paul and Dan,
The preservation of 0rgans is a near term prospect, and if
realized should result in a huge increase in the popularity of
cryonics. If whole body, reversable suspended animation follows, it
will open up the possibility for the elderly or sick of living a few
weeks every ten years or so. They can spend their time visiting with
family and friends, updating medical decisions, and generally keeping
current. Such propects reinforce the importance for all, especially
the more elderly to squeeze out every possible year, and even month,
of life extension possible in order to avoid just missing the boat.
Thomas
Reference:
Frozen organs may aid transplants, cancer therapy
By Merritt McKinney
NEW YORK, Jan 23 (Reuters Health) - One obstacle to organ
transplantation is that once an organ is removed from a donor, it must
be transplanted promptly before it begins to deteriorate. But
researchers in Canada have moved a step closer to the day when organs
can be frozen and stored for later transplantation.
Dr. Roger G. Gosden of McGill University in Montreal and colleagues
report the successful transplantation of rat ovaries that were stored
in liquid nitrogen.
Transplanting frozen organs is still in its infancy, but the research
demonstrates that the approach is feasible, Gosden told Reuters
Health.
"Attempts over many years with a variety of other organs failed to
restore function, mainly because of damage to the blood vessels,"
Gosden said. This damage results from the chemicals used in the
freezing process, he explained.
"I hope this encourages renewed efforts to freeze-bank other organs,"
Gosden said. Banking organs such as kidneys will be difficult, but it
could provide important benefits such as minimizing the number of
donated kidneys that go unused, he said.
The technique also has the potential to benefit young cancer patients,
according to Gosden. Since chemotherapy can cause sterility, removing
reproductive organs before chemotherapy and freezing them for later
use might eventually be possible.
Gosden's team carried out two series of ovary transplants. In the
first they removed one ovary and fallopian tube from eight rats and
transplanted the organs immediately into other animals.
In the second set of transplants, the researchers removed an ovary
from seven rats. Instead of transplanting the organs immediately,
however, the scientists infused each one with a protective fluid and
then slowly cooled it. After being stored in liquid nitrogen
overnight, each organ was slowly thawed and then transplanted.
Unlike the "fresh" transplants, not all of the frozen transplants were
successful, the researchers report in the January 24th issue of the
journal Nature.
"That is not surprising," according to Gosden, "because 50 years after
the first successful sperm freezing, results are still not perfect."
However, more than half of the transplant recipients ovulated normally
afterward and one rat became pregnant.
The technique needs to be refined, the authors point out, perhaps by
developing ways to minimize the formation of ice crystals that can
damage blood vessels.
The process now needs to be tested in larger animals such as sheep and
monkeys before being tested in people, Gosden said. If the approach
makes it to human testing, the surgery may be easier to perform than
in rats, since people have much larger blood vessels than rodents, he
explained. But since human organs are much larger, freezing and
preserving the tissue will be more challenging, he added.
SOURCE: Nature 2002;415:385
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