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Human Genome Project
The worldwide effort, originally named the
Human Genome Initiative but later known as the
Human Genome Project or HGP, began in 1987
and was celebrated as complete in 2001. When
begun, HGP was dubbed “big science” comparable
to placing human beings on the moon. It was international
in scope, involving numerous laboratories
and associations of scientists around the world
and receiving public funding in the United States
of $200 million per year with a scheduled fifteen
year timeline. The U.S. Department of Energy
(DOE) began funding the project in 1987, followed
by the National Institutes of Health (NIH) in 1990.
History and goals
The scientific goal was to map the genes and sequence
human DNA. Mapping would eventually
reveal the position and spacing of the then predicted
one hundred thousand genes in each of the
human body’s cells; sequencing would determine
the order of the four base pairs—the A (adenine),
T (thymine), G (guanine), and C (cytosine) nucleotides—
that compose the DNA molecule. The
primary motive was that which drives all basic science,
namely, the need to know. The secondary
motive was perhaps even more important, namely,
to identify the four thousand or so genes that were
suspected to be responsible for inherited diseases
and prepare the way for treatment through genetic
therapy. This would benefit society, HGP architects
thought, because a library of DNA knowledge
would jump start medical research on many fronts.
Many early prophecies found their fulfillment.
Some did not.
What was not anticipated was the competition
between the private sector and the public sector. J.
Craig Venter (b. 1946) led the private sector effort.
While on a grant from NIH, Venter applied for
nearly three thousand patents on Expressed Sequence
Tags (ESTs). The ESTs located genes but
stopped short of identifying gene function. A furor
developed when researchers working with government
money applied for patents on data that
merely reports knowledge of what already exists
in nature—knowledge of existing DNA sequences—
and this led to the 1992 resignation of
James Watson (b. 1928) from the directorship of
NIH’s National Center for Human Genome Research
(NCHGR). Watson, who along with Francis
Crick (b. 1916) is famed for his discovery of the
double helix structure of DNA, was the first to
head the NCHGR.
Venter then established The Institute for Genomic
Research (TIGR) and began using Applied
Biosystems automatic sequencers twenty-four
hours per day to speed up nucleotide sequencing
and the locating of ESTs. By 1998 Venter had established
Celera Genomics with sequencing capacity
fifty times greater than TIGR, and by June 17,
2000, he concluded a ninety percent complete account
of the human genome. It was published in
the February 16, 2001, issue of Science.
Francis Collins (b. 1950) took over NCHGR
leadership from Watson and found himself driving
the public sector effort, racing with Venter toward
the mapping finish line. Collins drew twenty laboratories
worldwide with hundreds of researchers
into the International Human Genome Sequencing
Consortium, which he directed from his Washington
office. Collins repudiated patenting of raw genomic
data and sought to place DNA data into the public
domain as rapidly as possible so as to prevent private
patenting. His philosophy was that the human
genome is the common property of the whole
human race. The public project finished almost simultaneously
with the private, and the ninety percent
complete Collins map appeared one day prior
to Venter’s on February 15, 2001, in Nature.
Human DNA, as it turns out, is largely junk—
that is, 98.6 percent does not code for proteins.
Half of the junk DNA consists of repeated sequences
of various types, most of which are parasitic
elements inherited from our distant evolutionary
past. Only 1.1 percent to 1.4 percent
constitute sequences that code for proteins that
function as genes.
Of dramatic interest is the number of genes in
the human genome. At the time of the announcement,
Collins estimated there are 31,000 proteinen-coding
genes; he could actually list 22,000. Venter
could provide a list of 26,000, to which he
added an estimate of 10,000 additional possibilities.
For round numbers, the estimate in 2001 stood
at 30,000 human genes.
This is philosophically significant, because
when the project began in 1987 the anticipated
number of genes was 100,000. It was further assumed
that human complexity was lodged in the
number of genes: the greater the number of genes,
the greater the complexity. So, confusion appeared
when, nearing the completion of HGP, scientists
could find only a third of the anticipated number.
Confusion was enhanced when the human
genome was compared to a yeast cell with 6,000
genes, a fly with 13,000 genes, a worm with 26,000
genes, and a rice cell with 50,000 genes. On the
basis of the previous assumption, a grain of rice
should be more complex than Albert Einstein.
With the near completion of HGP, no longer
could human uniqueness, complexity, or even distinctiveness
be lodged in the number of genes.
Collins began to speculate that perhaps what is
distinctively human could be found not in the
genes themselves but in the multiple proteins and
the complexity of protein production. Culturally,
DNA began to lose some of its magic, some of its
association with human essence.
The theology and ethics of HGP
At the outset, HGP scientists anticipated ethical and
public policy concerns; they were acutely aware
that their research would have an impact on society
and were willing to share responsibility for it.
When in 1987 James Watson counseled the U.S.
Department of Health and Human Services to appropriate
the funds for what would become HGP,
he recommended that three percent of the budget
be allotted to study the ethical, legal, and social implications
of genome research. Watson insisted that
society learn to use genetic information only in
beneficial ways; if necessary, the government
should pass laws at both the federal and state levels
to prevent invasions of privacy and discrimination
on genetic grounds. Moral controversy broke
out repeatedly during the near decade and a half
of research.
Religious responses to the advancing frontier
of genetic knowledge emerge mainly from people’s
concern to relieve human suffering and employ
science to improve human health and well-being.
A statement prepared by the National
Council of Churches under the leadership of Union
Seminary ethicist Roger L. Shinn affirms that
churches in the United States must be involved
with genetic research and therapy. “The Christian
churches understand themselves as communities
dedicated to obeying the will of God through service
to others. The churches have a particular concern
for those who are hurt or whose faith has
been shaken, as demonstrated by the long history
of the churches in providing medical care .…
Moreover, the churches have a mission to prevent
suffering as well as to alleviate it.”
In 1990 the Center for Theology and the Natural
Sciences (CTNS) at the Graduate Theological
Union (GTU) in Berkeley, California, obtained one
of the first grants offered by the Ethical, Legal, and
Social Issues (ELSI) division of NCHGR. A team of
molecular biologists, behavioral geneticists, theologians,
and bioethicists monitored the first years
of HGP research to articulate theological and ethical
implications of the new knowledge. Many religious
and ethical issues eventually became public
policy concerns. These are adumbrated below.
Genetic discrimination. When Watson recommended
the establishment of ELSI, the first public
policy concern was what he called privacy, here
called genetic discrimination. An anticipated and
feared scenario took the following steps. As researchers
identify and locate most if not all genes
in the human genome that either condition or, in
some cases, cause disease, the foreknowledge of
an individual’s genetic predisposition to expensive
diseases could lead to loss of medical insurance
and perhaps loss of employment opportunities. As
HGP progressed, the gene for cystic fibrosis was
found on chromosome seven, and Huntington’s
chorea on chromosome four. Alzheimer’s disease
was sought on chromosome twenty-one, and
colon cancer on chromosome two. Disposition to
muscular dystrophy, sickle-cell anemia, Tay Sachs
disease, certain cancers, and numerous other diseases
turned out to have locatable genetic origins.
More knowledge is yet to come. When it comes, it
may be accompanied by an inexpensive method
for testing the genome of each individual to see if
he or she has any genes for any diseases. Screening
for all genetic diseases may become routine for
newborns just as testing for phenylketonuria (PKU)
has been since the 1960s. A person’s individual
genome might become part of a data bank to
which each person, as well as health care
providers, would have future access. The advantage
is clear: Medical care from birth to grave could
be carefully planned to delay onset, appropriately
treat, and perhaps even prevent or cure genetically-
based diseases.
Despite the promise for advances in preventative
health care, fear arises due to practices of commercial
insurance. Insurance works by sharing risk.
When risk is uncertain to all, then all can be asked
to contribute equally to the insurance pool. Premiums
can be equalized. Once the genetic disorders
of individuals become known, however, this could
justify higher premiums for those demonstrating
greater risk. The greater the risk, the higher the
premium. Insurance may even be denied those
whose genes predict extended or expensive medical
treatment.
Some ethicists are seeking protection from discrimination
by invoking the principles of confidentiality
and privacy. They argue that genetic testing
should be voluntary and that the information
contained in one’s genome be controlled by the
patient. This argument presumes that if information
can be controlled, then the rights of the individual
for employment, insurance, and medical care can
be protected. There are grounds for thinking this
approach will succeed. Title VII of the 1964 Civil
Rights Act restricts pre-employment questioning
about work-related health conditions. Paragraph
102.b.4 of the Act potentially protects coverage for
the employee’s spouse and children. Legislative
proposals during the 1990s and early 2000s seem
to favor privacy.
Other ethicists argue that privacy is a misguided
cure for this problem. Privacy will fail, say
its critics, because insurance carriers will press for
legislation fairer to them, and eventually protection
by privacy may slip. In addition, computer linkage
makes it difficult to prevent the movement of data
from hospital to insurance carrier and to anyone
else bent on finding out. Most importantly, the privacy
argument overlooks the principle that
genome information should not finally be restricted.
The more society knows, the better the
health care planning can be. In the long run, what
society needs is information without discrimination.
The only way to obtain this is to restructure
the employment-insurance-health care relationship.
The current structure makes it profitable for
employers and insurance carriers to discriminate
against individuals with certain genetic configurations—
that is, it is in their best financial interest to
limit or even deny health care. A restructuring is
called for so that it becomes profitable to deliver,
not withhold, health care. To accomplish this the
whole nation will have to become more egalitarian—
that is, to think of the nation itself as a single
community willing to care for its own constituents.
The Abortion controversy. Given the divisiveness
of the abortion controversy in the United
States and certain other countries, fears arise over
possible genetic discrimination in the womb or
even prior to the womb in the petri dish. Techniques
have been developed to examine in vitro
fertilized (IVF) eggs as early as the fourth cell division
in order to identify so-called defective genes,
such as the chromosomal structure of Down
syndrome. Prospective parents may soon routinely
fertilize a dozen or so eggs in the laboratory,
screen for the preferred genetic make up, implant
the desired zygote or zygotes, and discard
the rest. What will be the status of the discarded
embryos? Might they be considered abortions? By
what criteria does one define “defective” when
considering the future of a human being? Should
prospective parents limit themselves to eliminating
“defective” children, or should they go on to
screen for enhancing genetic traits such as blue
eyes or higher intelligence? If so, might this lead to
a new form of eugenics, to selective breeding
based upon personal preference and prevailing social
values? What will become of human dignity
in all this?
Relevant here is that the legal precedent set by
Roe v. Wade (1973) would not serve to legitimate
discarding preimplanted embryos. This Supreme
Court case legalized the use of abortion to eliminate
a fetus from a woman’s body as an extension
of a woman’s right to determine what happens to
her body. This would not apply to preimplanted
embryos, however, because they are life forms outside
the woman’s body.
The Roman Catholic tradition has set strong
precedents regarding the practice of abortion. The
Second Vatican Council document Gaudium et spes
(1965) states the position still held today: “… from
the moment of its conception life must be guarded
with the greatest care, while abortion and infanticide
are unspeakable crimes.” The challenge to ethicists
in the Roman Catholic tradition in the near future
will be to examine what transpires at the
pre-implantation stage of the embryo to determine if
the word abortion applies. If it does, this may lead
to recommending that genetic screening be pushed
back one step further, to the gamete stage prior to
fertilization. The genetic make up of sperm and
ovum separately could be screened, using acceptable
gametes and discarding the unacceptable. The
Catholic Health Association of the United States
pushes back still further by recommending the development
of techniques of gonadal cell therapy to
make genetic corrections in the reproductive tissues
of prospective parents long before conception takes
place—that is, gametocyte therapy.
Genetic determinism, human freedom, and
the gene myth. Religious thinkers must deal not
only with laboratory science but with the cultural
interpretations of science, as well as public policy
influenced by both. A cultural myth has grown up
with media coverage of the Human Genome Project
that assumes “it’s all in the genes.” DNA has
emerged as a cultural icon, holding the “blueprint”
for humanity or being thought of as the “essence”
of what makes a person a person. Even though
molecular biologists withdraw from such extreme
forms of genetic determinism, a cultural myth has
arisen. Some commentators refer to it as the strong
genetic principle; others call it the gene myth.
Genes, sin, crime, and racial discrimination.
The belief in determinism promulgated by the
gene myth raises the question of moral and legal
culpability. Does a genetic disposition to antisocial
behavior make a person guilty or innocent before
the law? Over the next decade legal systems will
have to face a rethinking of the philosophical
planks on which concepts such as free will, guilt,
innocence, and mitigating factors have been constructed.
There is no question that research into
the connection between genetic determinism and
human behavior will continue and new discoveries
will become immediately relevant to the prosecution
and defense of those accused of crimes. The
focus will be on the concept of free will, because
the assumption of the Western philosophy coming
down from Augustine that underlies understanding
of law is that guilt can only be assigned to a
human agent acting freely. The specter on the genetic
horizon is that confirmable genetic dispositions
to certain forms of behavior will constitute
compulsion, and this will place a fork in the legal
road: Either the courts declare the person with a
genetic disposition to crime to be innocent and set
him or her free, or the courts declare him or her so
constitutionally impaired as to justify incarceration
and isolation from the rest of society. The first fork
would jeopardize the welfare of society; the second
fork would violate individual rights.
That society needs to be protected from criminal
behavior, and that such protection could be
had by isolating individuals with certain genetic
dispositions, leads to further questions regarding
insanity and race. The issue of insanity arises because
the genetic defense may rely upon precedents
set by the insanity defense. The courts treat
insanity with a focus on the insane person’s inability
to distinguish right from wrong when committing
a crime. When a defendant is judged innocent
on these grounds, he or she is incarcerated in a
mental hospital until the medical evaluators judge
that the individual is cured. Once cured, the person
may be released. In principle, such a person
might never be judged “cured” and may spend
more time in isolation than the prison penalty prescribed
for the crime, maybe even the rest of his or
her life. Should the genetic defense tie itself to the
insanity defense, and if one’s DNA is thought to
last a lifetime, then the trip to the hospital may become
the equivalent of a life sentence. In this way
the genetic defense may backfire.
With this prospect, we have returned to the
specter of genetic discrimination. The current discussion
of possible genetic influence on antisocial
behavior is riddled with fears of discrimination, especially
its racial overtones. Because the percentage
of black men among the population of incarcerated
prisoners is growing, society could invoke
the gene myth to associate genes with criminal
predispositions and with race. A stigma against
black people could arise, a presumption that they
are genetically predisposed to crime. University of
California sociologist Troy Duster fears that if we
identify crime with genes and then genes with
race, we may inadvertently provide a biological
support for prejudice and discrimination.
The gay gene. Theological and ethical debate
has arisen over the 1993 discovery of a possible
genetic disposition to male homosexuality. Dean
H. Hamer and his research team at the U.S. National
Cancer Institute announced that they discovered
evidence that male homosexuality—at least
some male homosexuality—is genetic. Constructing
family trees in instances where two or more
brothers are gay combined with actual laboratory
testing of homosexual DNA, Hamer located a region
near the end of the long arm of the X chromosome
that likely contains a gene influencing
sexual orientation. Because men receive an X chromosome
from their mother and a Y from their father
(women receive two X’s, one from each parent),
this means that the possible gay gene is
inherited maternally. Mothers can pass on the gay
gene without themselves or their daughters being
homosexual. A parallel study of lesbian genetics is
as yet incomplete; and the present study of gay
men will certainly require replication and confirmation.
Scientists do not yet have indisputable
proof.
The ethical implications, should a biological
basis for homosexuality be confirmed, could point
in more than one direction. The scientific fact does
not itself determine the direction of the ethical interpretation
of that fact. The central ethical question
is this: Does the genetic disposition toward
homosexuality make the bearer of that gene innocent
or guilty? Two answers are logically possible.
On the one hand, a homosexual man could
claim that because he inherited the gay gene and
did not choose a gay orientation by his own free
will, he is innocent. The biological innocence position
could be buttressed by an additional argument
that homosexual activity is not itself sinful; it
is simply one natural form of sexual expression
among others. One could go still further to say that
because it is biologically inherited that it is God’s
will; that a person’s homosexual predisposition is
God’s gift.
On the other hand, one could follow the opposite
road and identify the gay gene with a carnal
disposition to sin. Society could claim that the
body inherited by each person belongs to who
they are—people are determined at least in part by
what their parents bequeathed them—and that an
inherited disposition to homosexual behavior is
just like other innate dispositions such as lust or
greed, which are shared with the human race generally;
all this constitutes the state of original sin
into which we are born. Signposts point in both
ethical directions.
Beyond the question of guilt or innocence
ethicists anticipate another issue, namely, the risk
of stigma. Might the presence of the gay gene in
an unborn fetus be considered a genetic defect
and become grounds for abortion? Would routine
genetic testing lead to a wholesale reduction of
gay men in a manner parallel to that of children
with Down Syndrome? Would this count as class
discrimination?
Somatic therapy versus germline enhancement.
The debate over two distinctions—somatic
versus germline intervention and therapy
versus enhancement intervention—involves both
secular and religious discussions. The term somatic
therapy refers to the treatment of a disease
in the body cells of a living individual by trying to
repair an existing defect. The term germline therapy
refers to intervention into the gametes, perhaps
for the purpose of eliminating a gene such as
that for cystic fibrosis so that it would not be
passed along to future generations. Both somatic
and germline therapies are conservative when
compared to genetic enhancement. Enhancement
goes beyond mere therapy for existing genes that
may be a threat to health by selecting or adding
genes to make an individual “superior” in some
fashion. Enhancement might involve genetic engineering
to increase bodily strength or intelligence
or other socially desirable characteristics.
Ethical commentators almost universally agree
that somatic therapy is morally desirable, and they
look forward to the advances HGP will bring for
expanding this important work. Yet they stop short
of endorsing genetic selection and manipulation
for the purposes of enhancing the quality of biological
life for otherwise normal individuals or for
the human race as a whole. New knowledge
gained from HGP might locate genes that affect
the brain’s organization and structure so that careful
engineering might lead to enhanced ability for
abstract thinking or to other forms of physiological
and mental improvement.
Religious ethicists argue that somatic therapy
should be pursued, but enhancement through
germline engineering raises cautions about
protecting human dignity. In a 1982 study, the
World Council of Churches stated: “Somatic cell
therapy may provide a good; however, other issues
are raised if it also brings about a change in germline
cells. The introduction of genes into the
germline is a permanent alteration .… Nonetheless,
changes in genes that avoid the occurrence of
disease are not necessarily made illicit merely because
those changes also alter the genetic inheritance
of future generations .… There is no absolute
distinction between eliminating defects and
improving heredity” (quoted in Peters, ed., 1998,
pp. 6–8). The primary caution raised by the WCC
here has to do with the lack of knowledge regarding
the possible consequences of altering the
human germline. The present generation lacks sufficient
information regarding the long term consequences
of a decision today that might turn out to
be irreversible tomorrow. Thus, the WCC does not
forbid forever germline therapy or even enhancement;
rather, it cautions people to wait and see.
The Catholic Health Association is more positive:
“Germline intervention is potentially the only
means of treating genetic diseases that do their
damage early in embryonic development, for
which somatic cell therapy would be ineffective.
Although still a long way off, developments in molecular
genetics suggest that this is a goal toward
which biomedicine could reasonably devote its efforts”
(p. 19)
Another reason for caution regarding germline
enhancement, especially among the Protestants, is
the specter of eugenics. The word eugenics connotes
the ghastly racial policies of Nazism, and this
accounts for much of today’s mistrust of genetic
science in Germany and elsewhere. No one expects
a resurrection of the Nazi nightmare; yet
some critics fear a subtle form of eugenics slipping
in the cultural back door. The growing power to
control the design of living tissue will foster the
emergence of the image of the “perfect child,” and
a new social value of perfection will begin to oppress
all those who fall short.
Gene patenting. A controversy exploded in
1991 over gene patenting prompted by the filing
for intellectual property rights by J. Craig Venter on
nearly three thousand ESTs, expressed sequence
tags. Each of these ESTs consisted of three hundred
to five hundred base pairs made from cDNAs,
copies of DNA sequences produced by polymerase
chain reaction. ESTs are gene fragments, not whole
genes; hence they mark the location of a gene but
cannot identify gene function. Two issues became
the focus of controversy. First, should the U.S.
Patent and Trademark Office grant patents on genomic
data? Even though the patents applied for
were on copies of DNA sequences, their only
value was to report raw genomic information. It
appeared to critics that these applications failed to
meet the three patenting criteria: novelty, utility,
and non-obviousness. Second, should the U.S. government
apply for and receive such patents in
competition with the private sector? Venter’s first
patent applications were filed while he was working
on a government grant; later he moved to the
private sector and continued filing for intellectual
property rights on his discoveries. James Watson
followed by Francis Collins at the NIH both opposed
patenting raw genomic data.
Cloning. Technically known as “somatic cell nuclear
transfer,” cloning techniques were developed
in 1996 by Ian Wilmut at the Roslin Institute near
Edinburgh, Scotland. Wilmut announced the
cloning of Dolly the sheep in February 1997. The
scientific breakthrough consisted of returning an
already differentiated DNA nucleus to its pre-differentiated
state and then transferring it to an ennucleated
oocyte to make an embryo. The new
embryo thus contains the genome of the donor nucleus.
In the worldwide controversy that broke out
in 1997 and continues in bioethical discussion, the
debate seems to bypass the science of nuclear
transfer; rather, the focus is on producing multiple
human beings with duplicate genomes. Critics of
reproductive cloning argue that children produced
by cloning would suffer from loss of individuality,
identity, and dignity. Roman Catholic critics along
with Wilmut himself oppose human reproductive
cloning on the grounds of safety—that is, the imperfect
technology would lead to the destruction
of many early embryos. Defenders of nuclear
transfer research distinguish sharply between reproductive
cloning, which they oppose, and therapeutic
cloning, which is necessary for stem cell
research.
Stem cells. The isolation of human embryonic
stem cells (hES cells) was accomplished in August
1997 by James Thomson at the University of Wisconsin
on funds from the Geron Corporation. The
hES cells are removed from the inner mass of the
blastocyst, an embryo at four to six days old. When
isolated and placed on a feeder tray, hES cells
become immortal—that is, they divide indefinitely.
In addition, they are pluripotent and able to
differentiate into any and every tissue. The research
goal is to control gene expression so as to
make designated tissue for rejuvenating human organs.
Some progress in gene control has been
achieved. The next hurdle to jump is histocompatibility,
namely, to avoid organ rejection by matching
donor and recipient genetic codes. It is likely
that experiments with somatic cell nuclear transfer
will be required to attain histocompatibility. Ethical
objections to stem cell research from Roman
Catholics center on destruction of blastocysts
for research purposes. Ethical support for stem cell
research stresses beneficence; it emphasizes
the marvelous advances in human health and wellbeing
that this medical science might offer the
human race.
Conclusion: theological commitments to
human dignity
Virtually all Roman Catholics and Protestants who
take up the challenge of the new genetic knowledge
seem to agree on a handful of theological axioms.
First, they affirm that God is the creator of
the world and, further, that God’s creative work is
ongoing. God continues to create in and through
natural genetic selection and even through human
intervention in the natural processes. Second, the
human race is created in God’s image. In this context,
the divine image in humanity is tied to creativity.
God creates; so do human beings. With increasing
frequency, humans are described by
theologians as co-creators with God, making their
human contribution to the evolutionary process. In
order to avoid the arrogance of thinking that humans
are equal to the God who created them in
the first place, people must add the term created to
make the phrase created co-creators. This emphasizes
human dependency on God while pointing
to human opportunity and responsibility. Third,
these religious documents place a high value on
human dignity.
By dignity they mean what eighteenth-century
German philosopher Immanuel Kant meant,
namely, that each human being is treated as an
end, not merely as a means to some further end.
As church leaders respond responsibly to new
developments in HGP, one thing can be confidently
forecast: This affirmation of dignity will become
decisive for thinking through the ethical implications
of genetic engineering. Promoting
dignity is a way of drawing an ethical implication
from what the theologian can safely say, namely,
that God loves each human being regardless of his
or her genetic makeup and, therefore, people
should love one another according to this model.
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