Scientists Bring Cells in Dead Pigs Back to Life

Pig Comes Out of Barn
A
pig
steps
into
the
sun
in
England.
Cellular
activity
was
returned
to
the
organs
of
a
dead
pig
after
a
recent
experiment.

Nathan
Stirk
/
Getty
Images

The
pigs
had
been
dead
an
hour
when
researchers
at
Yale
University
circulated
a
nutrient-rich
fluid
through
their
bodies.
After
six
hours,
some
cells
in
the
pigs’
organs
showed
signs
of
functioning
again.
Cellular
activity
returned
to
places
in
their
hearts,
livers,
kidneys
and
brains.
The
pigs
were
not
brought
back
to
life–they
didn’t
display
any
brain
activity
that
could
be
interpreted
as
the
animals
regaining
consciousness,
reports


Nature
News’

Max
Kozlov.
But
the
findings,
which
were
published
last
week
in
the
journal


Nature
,
challenge
the
notion
that
cardiac
death
can’t
be
reversed,
according
to


Wired
.

The
researchers
hope
the
finding
is
an
early
step
in
the
effort
to
be
able
to
make
more
human
organs
available
for
transplant
long
after
death,
writes
Gina
Kolata
for
the


New
York
Times
.
But
such
applications
are
still
a
ways
off.
The
technology
the
researchers
used
is
“very
far
away
from
use
in
humans,”
Stephen
Latham,
a
bioethicist
at
Yale
University
who
worked
closely
with
the
researchers,
tells
the

Times
.

The
study
highlights
the
idea
that
death
is
not
a
moment
but
a
process,
Arthur
Caplan,
a
bioethicist
at
New
York
University
who
was
not
involved
in
the
study,
tells


Nature
News
.

The
researchers
conducted
a
similar
experiment
in
2019,
connecting
the
heads
of
dead
pigs
to
a
system
that
circulated
a
fluid
through
the
pigs’
brains,
writes
Brendan
Parent,
the
director
of
transplant
ethics
and
policy
research
at
New
York
University’s
Grossman
School
of
Medicine,
in
a
commentary
about
the
new
research
published
in


Nature
.
The
pigs
had
been
decapitated
for
food
production
four
hours
prior,
but
the
researchers
were
able
to
revive
the
activity
of
some
brain
cells.
At
the
time,
University
of
Pennsylvania
bioethicist
Jonathan
Moreno,
who
was
not
affiliated
with
the
research,
told
the


Times

that
“if
ever
there
was
an
issue
that
merited
big
public
deliberation
on
the
ethics
of
science
and
medicine,
this
is
the
one.”
The
findings
blurred
the
line
between
what
it
means
for
a
brain
to
be
alive
versus
dead
and
raised
questions
about
how
patients
who
have
experienced
extensive
brain
damage
should
be
treated.

The
study
raises
ethical
questions,
particularly
if
the
system
is
one
day
used
to
restore
brain
activity
after
death,
Dr.
Nita
Farahany,
a
neuroethicist
at
Duke
University,
tells

Nature
News
.
The

Times

noted
that
the
solution
the
researchers
used
included
nerve
blockers
that
would
ensure
the
brain
was
not
active
during
the
experiment.

Dr.
Deepali
Kumar,
president
of
the
American
Society
of
Transplantation
and
professor
of
medicine
at
the
University
of
Toronto,
tells


Wire
d’s
Emily
Mullin
that
the
system
could
eventually
be
used
to
make
more
human
organs
available
for
transplant.
“There
is
a
significant
shortage
of
organs
for
transplantation,
and
we
certainly
need
new
technologies
that
can
help
improve
the
organ
supply,”
she
says.

There
are
around
106,000
people
in
the
U.S.
on
the
national
transplant
waiting
list,
and
17
people
die
each
day
waiting
for
a
transplant,
according
to

Wired
.

Artikel ini diambil dari https://www.smithsonianmag.com/smart-news/scientists-bring-cells-in-dead-pigs-back-to-life-180980557/

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