In 2006/7 Japanese cell biologist Shinya Yamanaka published important
research showing that specialized adult cells such as skin cells could
be “reprogrammed” to become pluripotent stem cells. Yamanaka called the
reprogrammed cells “induced pluripotent stem cells” (or iPSCs) and the
type of research “cell reprogramming”.
He neither created nor experimented upon human embryos in his
research. But to make reagents for reprogramming the somatic cells, he
apparently did use cells from a cultured cell line created in 1977 and
originally derived from the tissue of a child who was aborted earlier in
the 1970s (called “HEK cells,” Human Embryonic Kidney cells). If I
understand the process correctly, the genes used to reprogram the
somatic cells were delivered into the cells using viruses (called
lentiviral vectors). These viral delivery systems were created using
HEK cells.
Pro-life groups such as Children of God (COG) for Life have drawn
attention to this little known fact and in doing so have provided the
pro-life community an important service.
Unfortunately, some of these groups are claiming that because
Yamanaka used ‘tainted’ cells in his research, the production of iPSCs
by cell reprogramming is intrinsically evil.
They are incorrect. The production of iPSCs does not require the use
of HEK cells, and can be—and is being—done successfully without them.
If the research is carried out without using ‘tainted’ cells, then the
procedure itself need pose no moral problems.
They also argue that because Yamanaka used tainted cells, his
research, for which he received the 2012 Nobel Prize, deserves a blanket
condemnation. For two reasons, I disagree.
First, a blanket condemnation fails to make distinctions between what
is praiseworthy and what might deserve criticism. With respect to the
latter, if Yamanaka knew the immoral origin of the HEK cells, had
reasonable alternatives available to him, and yet still used the tainted
cells, then (to that extent) I think he did wrong.
His wrongdoing certainly would not be the wrong of killing;
nor would it be wrongful cooperation in killing, since using cells from
the cultured line 30 years later did not facilitate the original
evildoing in any way. Moreover, using HEK cells in research is unlikely
to cause scandal in the formal sense (i.e., be a cause of leading
others into grave sin), since HEK is so widely used in the scientific
community that it barely raises an eyebrow.
Its wrongness would lie in the failure of the duty we all share to testify to the value of human life, in this case by refusing
to use products created by exploiting life: a failure of duty to bear
witness to the truth. To constitute a moral failure, however, Yamanaka
would have had to know the origins of the cells, have reasonable
alternatives available, and not select them. I don’t know if these
conditions prevailed.
Because of Jesus’ perspicuous self-sacrificing witness to truth,
Christians, called to be Christ in the world, have an especially strong
duty to bear witness. I don’t know if Yamanaka is a Christian. If he
is, then he shares that stronger duty. If not, he still has a duty to
the truth. But we know that even Christians, including Christian
leaders, sometimes fail to bear rightful witness. Blanket condemnations
of their lives or apostolates would be simplistic and could be
wrongful. Why? Because one’s life is a complex matrix of actions, some
of which may, and others of which may not, bear perspicuous witness.
If in one respect his research fails to measure up to ethical
standards, in another, the Japanese researcher has been an extraordinary
witness to the truth of the sanctity of human life. As one of the
leading adult stem cell researchers in the world, he dedicated years of
his life to finding a way of deriving pluripotent stem cells without
killing embryos. His research has transformed a field, which once was
almost monolithically committed to embryo destructive research. At a
time when Obama was about occupy the Oval Office and running on a
platform of overturning the Bush stem cell policy, just twelve months
earlier (Nov. 2007) Yamanaka published this almost incredible news: “a
new way to make pluripotent—embryonic like—stem cells without exploiting
embryos.” I don’t think there’s any doubt that because of his
accomplishments, many, many less embryonic people are being killed today
in research than otherwise would be. And this was precisely part of
Yamanaka’s motives, to stop embryo destructive research. Whatever in
his research deserves criticism, this deserves praise.
Second, modern secular science is a morally mixed bag. The wheat and
weeds are mixed together in a giant field we call the scientific
endeavor. One of the points of genius of the empirical method is its
limitless and unfolding capacity for generating new and deeper knowledge
by building on the systematic accomplishments of earlier research. If
earlier research, however, entails immoral activity, the products and
knowledge gained by it will in some way be tainted by the immorality.
In the field of stem cell research, including morally licit adult
stem cell research, no one can claim that the knowledge they rely upon
or the products they use are “pure” and unrelated to prior research that
has been illicitly obtained.
So how should we assess scientific accomplishments, such as those of
Yamanaka, that include morally questionable elements? We condemn gross
immorality when we find it; and so we condemn the original killing of
the baby in the 1970s, which Yamanaka had nothing to do with. We
criticize the scientific exploitation of the baby’s mortal remains. We
deplore the indifference of some scientists to the original killing.
And we admonish researchers in the present to bear witness to the truth
by refusing to use products derived from the baby’s tissues.
If they use them out of non-culpable ignorance, then they do no more
wrong than did children who innocently drank Pepsi products that
utilized flavor chemicals developed in research using HEK cells.
If they use them with full knowledge, but don’t have reasonable
alternatives, then we assess two things: 1) whether the use is likely to
cause scandal, and 2) if the research is serious enough to warrant
tolerating (but not intending) other harms that might arise from the use
(e.g., legitimizing in people’s minds the original illicit act). If
there is proportionately grave reason and if using the products is unlikely to cause scandal, then we may conclude the researchers are justified in using them.
If reasonable alternatives are readily available, and informed
researchers don’t use them, then we are warranted in concluding that
they fail in their duty to witness to the truth by refusing to use the
alternatives.
But we also praise the good they do, in Yamanaka’s case, in effectively—and by intent— dealing a lethal blow to one of the most immoral forms of scientific research in modern history.