When it comes to CRISPR, our society has some important decisions to make.
Just last week, scientists reported a new first in the journal Nature: They edited heritable cells in human embryos to treat an inherited form of heart disease. The day after the research was published, a group of genetics experts published a statement calling for further debate before applications of the technology are taken any further in humans.
According to a new survey of 1,600 adults published in the journal Science today, much of the American public shares this desire for engagement in decision-making. Led by Dietram Scheufele, a professor of science communication at the University of Wisconsin - Madison, the study found that while support for gene editing applications varies, a majority of respondents think the public should be consulted before genome editing is used in humans.
Gene editing presents the potential for remarkable benefits.
The potential to cure genetic disease and to ensure the safety of the world's food supply in the face of climate change are perhaps the most exciting opportunities, said Jennifer Doudna, a chemist at UC Berkeley who was an early pioneer of the powerful gene-editing technique CRISPR-Cas9 and was not involved in the new study.
But it also raises some serious ethical questions, especially when we turn our attention to tweaking the human genome, Scheufele said. Many people find some applications like disease treatment valuable, and others like making your children more intelligent morally shaky.
For example, scientists may eventually develop a cure for what some people dont consider an illness like a disability, Scheufele said. Would those who chose not to undergo genetic therapy or who couldnt afford it then be discriminated against even more as a result?
These and other ethical concerns go beyond the bounds of science, Scheufele says, and his poll results show that the public wants to be involved in the debate.
Oregon Health & Science University
Embryos develop into blastocysts after co-injection, which could someday be used in fertility clinics to help people trying to have children free of genetic disease.
Embryos develop into blastocysts after co-injection, which could someday be used in fertility clinics to help people trying to have children free of genetic disease. (Oregon Health & Science University)
Because of the fast-moving progress of gene editing research and the vast potential for both beneficial applications and negative consequences, many experts have called for public engagement on the issue including in a consensus report released this year by the National Academy of Sciences (NAS) and the National Academy of Medicine (NAM).
The new study strove to answer some questions emerging from the National Academies report. First, how do people feel about different applications of gene editing? And secondly, do Americans agree that the public should be consulted on gene editing applications? Similar questions had been asked in previous polls, but the authors wanted to get some more specific data.
Human genome editing can be used for two broad purposes: therapy or enhancement. Therapeutic applications include the treatment of genetic disorders like muscular dystrophy or sickle cell disease, while enhancement might be used to change your daughters eye color or make her grow taller.
Each of these changes can be heritable or not, depending on which type of cell is tweaked. Somatic cells are nonreproductive, so any changes to these cells will not be passed on to future generations. Germline cells, on the other hand, are heritable therefore, any modifications will be inherited by the treated persons children and grandchildren.
Reprinted with permission from D.A. Scheufele et al., Science 357:6351 2017
A graphic from the paper showing the acceptance of gene editing by application.
A graphic from the paper showing the acceptance of gene editing by application. (Reprinted with permission from D.A. Scheufele et al., Science 357:6351 2017)
The new poll shows that two-thirds of Americans support therapeutic applications, whether to somatic (64% support) or germline (65% support) cells. When it comes to enhancement, however, there is much less approval. Only 39% of respondents find somatic enhancement acceptable, with 35% saying it is unacceptable. Levels of support dropped even lower for heritable germline enhancement, to 26% in acceptance and 51% in opposition.
When these results were broken down by how religious respondents were, some variation emerged. Religious people are less supportive of genome editing overall. Only half of them expressed some support of treatment applications, compared with 75% of nonreligious respondents. When it comes to enhancement, 28% of religious respondents and 45% of nonreligious people reported some level of support.
The authors also ranked respondents in terms of low, medium and high knowledge by their score on a nine-question factual quiz. Those in the high-knowledge category were far more supportive of treatment applications, with 76% in support compared with only 32% of low-knowledge respondents.
When asked about enhancement applications, the high-knowledge group was very polarized, with 41% in support and a nearly equal amount in opposition. In contrast, half of low-knowledge people reported that they neither support nor oppose gene editing.
Robert Blendon, who studies health policy at the Harvard School of Public Health, said that the polarization could be there for a reason. Those who know more about the technology have probably learned about it because they have a vested interest maybe a genetic disease runs in their family or they are concerned with ethical consequences.
Reprinted with permission from D.A. Scheufele et al., Science 357:6351 2017
A graphic from the paper showing the opinions of respondents based on religiosity and knowledge.
A graphic from the paper showing the opinions of respondents based on religiosity and knowledge. (Reprinted with permission from D.A. Scheufele et al., Science 357:6351 2017)
The more religious people were, the less likely they were to trust the scientific community to responsibly develop new technologies. This trend was opposite when it came to knowledge: The more knowledgeable people were about the technology, the more likely they were to trust the scientists.
While the two groups may have very different reasons, both highly religious and highly knowledgeable people agreed that the public should be involved in decision-making before gene editing is used in humans.
Blendon said that while its clear the public wants a say in how gene editing is used, its unclear exactly what public engagement looks like. The first way most people might think of being consulted is through their elected officials, but other surveys suggest that the public actually doesnt think the government should be making decisions about genome technology.
Scheufele said that there is currently no infrastructure in place for crucial two-way communication between scientists and the public on the genome editing issue but its important to develop it.
Diverse groups and perspectives have an important role to play in shaping the early stages of human genome editing research, Scheufele said. Scientists may not think to investigate all the questions that the public may deem vital.
If we ask the wrong questions, he said, then we may have perfect technical answers to all the wrong questions.
@mirakatherine
Originally posted here:
Americans want a say in human genome editing, survey shows - Los Angeles Times
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