Summarize the scientific and ethical advantages and disadvantages of using embryonic stem cells versus adult stem
cells for stem cell therapies. What will be an ideal response?
ANSWER: Scientific Ethical
Advantages Disadvantages Advantages Disadva
Embryonic
stem cells
1. Because
embryonic
stem cells
have to form
all of the 200-
plus different
cell types that
make up the
tissues in our
body
(pluripotent),
most
proposed
therapies use
these cells.
2. Stem cells
can be
removed from
an embryo
and grown in
the laboratory
to establish an
embryonic
stem-cell line.
? Rejection of
transplanted
cells by the
patient’s
immune
system.
N/A Harvest
embryo
cells de
human
Adult stem
cells
? Because the
stem cells
? Because adult
stem cells
? Adult stemcell
therapy
N/Aoriginate
from the
patient, there
is no rejection
of the
transplanted
cells by the
immune
system.
have only
limited
developmental
potential
(multipotent),
they can only
be used to
treat a
relatively
small number
of diseases.
? Adult stem
cells are rare
and difficult to
isolate.
? Adult stem
cells are more
difficult to
grow and
reprogram
than
embryonic
cells.
does not
involve
embryo
destruction.
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