Scientists have been studying the transplantation of animal organs into humans – or xenotransplantation – since the 1990s but have continuously encountered serious problems, such as organ rejection and transmission of pig retroviruses... The use of 3D printed organs is far superior to the decades-long, ineffective and immensely cruel pursuit of pig-to-human transplants.
Recent news has touted the success of scientists to use genetic
engineering on pigs, claiming this will make pig organs feasible for
transplanting into humans.
Scientists have created gene-edited piglets that tested negative for viruses
that could be transferred to humans. Dr. George Church, a Harvard geneticist
who led the experiments, claims that the first pig-to-human transplants
could occur within the next two years.
This so-called solution to the organ crisis is fraught with health risks
to humans and incredibly abusive to pigs and other animals who suffer
through painfully invasive experiments. It is also inferior to work being
done that shows real promise to bioengineer organs for human transplant
using actual human cells and cutting-edge technology.
This isn’t the first time Dr. Church has claimed that pig organs are soon to
be made available. In 2017 he said, “we hope to do transplants to humans in
under a year.”
In fact, scientists have been studying the transplantation of animal organs
into humans – or xenotransplantation – since the 1990s but have continuously
encountered serious problems, such as organ rejection and transmission of
pig retroviruses.
In gruesome experiments, baboons receiving pig hearts died almost
immediately upon transplantation, and researchers at the National Institute
of Health (NIH) have implanted pig hearts into baboons, alongside the
baboons’ own hearts. Some companies are creating pig farms, raising hundreds
of gene-edited pigs to be cruelly killed and their organs used as spare
parts.
In contrast to these hideous and exploitive animal experiments,
significant advances are occurring in the field of regenerative medicine,
which uses human cells and 3D printing to create complex tissues, precursors
to 3D printed organs that can one day be transplanted into humans.
Before scientists can create whole organs, considerable advances are
necessary. Work is currently underway at several institutions in the area of
tissue engineering to fabricate more intricate tissues and at greater speed.
At Harvard University, scientists are generating complex tissues printed
onto a connective grid, with channels that perfuse the tissue with nutritive
fluids, while research being done in The Netherlands and Switzerland is
dramatically shortening the speed of production down to mere seconds.
Remarkable results have been achieved by Chicago biotech firm BIOLIFE4D.
Using a specialized bioink composed of human cells and an innovative
printing algorithm, the company recently 3D printed a mini human heart with
identical structure as a full-sized heart. The mini heart can be used for
cardiotoxicity testing and to help advance heart disease treatments, and
eventually, says CEO Steven Morris, to “3D bioprint full-sized hearts viable
for transplant, and change the way heart disease is treated forever”.
Unlike gruesome pig organ experiments, as scientists continue to work
towards creating viable, transplantable organs, regenerative medicine is
already flourishing and saving lives.
Research at Cincinnati Children’s Hospital is using human pluripotent stem
cells to grow organs for transplant. The researchers discovered that
previous efforts to create viable organs were hampered by the presence of
animal byproducts and have now bioengineered a liver free of animal products
that is anticipated to enter a clinical trial to transplant a manufactured
liver into a patient.
And advances in 3D printing have saved the lives of at least three
babies. The children were afflicted with tracheobronchomalacia, a disorder
that causes collapse of the airway and breathing failure. This was cured
with a 3D printed, growth-flexible implant that replaced the defective
trachea.
These ground-breaking applications of regenerative medicine are just the
beginning, as scientists continue to make headway on creating actual 3D
printed organs that can be implanted into humans, in many cases using the
patient’s own cells to minimize rejection. This approach is far superior to
the decades-long, ineffective and immensely cruel pursuit of pig-to-human
transplants.
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