GM Watch
  • Main Menu
    • Home
    • News
      • Newsletter subscription
      • Daily Digest
      • News Reviews
      • News Languages
    • Articles
      • GM Myth Makers
      • GM Reports
      • GM Quotes
      • GM Myths
      • Non-GM successes
      • GM Firms
        • Monsanto: a history
        • Monsanto: resources
        • Bayer: a history
        • Bayer: resources
    • Videos
      • Latest Videos
      • Must see videos
      • Cornell videos
      • Agriculture videos
      • Labeling videos
      • Animals videos
      • Corporations videos
      • Corporate takeover videos
      • Contamination videos
      • Latin America videos
      • India videos
      • Asia videos
      • Food safety videos
      • Songs videos
      • Protests videos
      • Biofuel myths videos
      • Index of GM crops and foods
      • Index of speakers
      • Health Effects
    • Contact
    • About
    • Donations
    • How donations will help us
News and comment on genetically modified foods and their associated pesticides    
  • News
    • Latest News
    • Newsletter subscription
    • News Reviews
    • News Languages
      • Notícias em Português
      • Nieuws in het Nederlands
      • Nachrichten in Deutsch
    • Archive
      • 2021 articles
      • 2020 articles
      • 2019 articles
      • 2018 articles
      • 2017 articles
      • 2016 articles
      • 2015 articles
      • 2014 articles
      • 2013 articles
      • 2012 articles
      • 2011 articles
      • 2010 articles
      • 2009 articles
      • 2008 articles
      • 2007 articles
      • 2006 articles
      • 2005 articles
      • 2004 articles
      • 2003 articles
      • 2002 articles
      • 2001 articles
      • 2000 articles
  • Articles
    • GM Myth Makers
    • GM Reports
    • How donations will help us
    • GM Quotes
    • GM Myths
    • Non-GM successes
    • GM Firms
      • Monsanto: a history
      • Monsanto: resources
      • Bayer: a history
      • Bayer: resources
  • Videos
    • Index of speakers
    • Glyphosate Videos
    • Latest Videos
    • Must see videos
    • Health Effects
    • Cornell videos
    • Agriculture videos
    • Labeling videos
    • Animals videos
    • Corporations videos
    • Corporate takeover videos
    • Contamination videos
    • Latin America videos
    • India videos
    • Asia videos
    • Food safety videos
    • Songs videos
    • Protests videos
    • Biofuel myths videos
    • Index of GM crops and foods
  • Contact
  • About
  • Donations

LATEST NEWS

  • Landmark Agent Orange court case against agrochemical giants gets underway

  • Genetic breakdown of molecular mechanism underpinning GM "sterile" insect techniques

  • International Take Action: Tell US Senate: Vote No on Mr Monsanto (Tom Vilsack)

  • How to respond to the UK consultation on the deregulation of gene editing

  • Japan's first genome-edited food, a tomato, gets green light for distribution

GMWatch Facebook cornfield banner

SCIENCE SUPPORTS REGULATION OF GENE EDITING

Plant tissue cultures

GENE EDITING: UNEXPECTED OUTCOMES AND RISKS

Damaged DNA on fire

GENE-EDITED CROPS & FOODS

Help stop the new threat

LATEST VIDEOS

  • Seed keepers and truth tellers: From the frontlines of GM agriculture
  • Myths and Truths of Gene-Edited Foods
  • Dangers of gene-edited foods

News Menu

  • Latest News
  • News Reviews
  • Archive
  • Languages

Please support GMWatch

Donations

You can donate via Paypal or credit/debit card.

Some of you have opted to give a regular donation. This is greatly appreciated as it helps place us on a more stable financial basis. Thank you for your support!

Editing babies? We need to learn a lot more first

Details
Published: 28 November 2018
Twitter

An experiment in China to alter the genomes of embryos in vitro, then implant them in the mother, is a step too far

EXCERPT: In the Chinese study, led by He Jiankui, a physicist, not a medical doctor, on the faculty of Southern University of Science and Technology in Shenzhen, the targeted gene was CCR5, which helps enable H.I.V. to enter cells. While preventing this intrusion might sound like an advance in the fight against AIDS, it is completely unnecessary and may even carry the hazard of increasing the subject’s susceptibility to other types of infection, such as influenza and West Nile fever. Previous genome editing studies have shown it is possible to disable the CCR5 gene in adults without working at the embryo level. So the experiment was not necessary, had no scientific basis and must be considered unethical when balanced against the known and unknown risks.
---

Editing babies? We need to learn a lot more first

By Eric J. Topol
Dr. Topol is a professor of molecular medicine at the Scripps Research Institute
New York Times, Nov 27, 2018
https://www.nytimes.com/2018/11/27/opinion/genetically-edited-babies-china.html

* An experiment in China to alter the genomes of embryos in vitro, then implant them in the mother, is a step too far.
* He Jiankui, a physicist and researcher, says he edited the genes of twins, a claim that has drawn widespread criticism.

Sooner or later it was bound to happen. A rogue scientist in China claims to have edited a gene in two human embryos and implanted them in the mother’s womb, resulting in the birth of genetically altered twin girls. We’re no longer in the realm of science fiction. This hacking of their biological operating instructions, which they will pass on to their children and generations to come, is a dangerous breach of medical ethics and responsible research and must be condemned.

This is not to say that medicine won’t someday employ gene-editing technologies in similar ways. But that time has not arrived. There are still too many risks, too many unknowns, about tinkering with our heritable genetic blueprints.

In recent years genome editing has been appropriately heralded as the most important advance of biotechnology of our generation, and most likely the past century. Commonly known as Crispr, this technique and related DNA editing tools enable their users to cut and paste discrete letters of the genome. This capability has markedly advanced science, shedding new light on the complex human genome with its billions of A, C, T and G letters that are the architecture of who we are.

Already, many clinical trials using this technology are underway involving patients with rare diseases like hemophilia, thalassemia and sickle cell. The difference between these efforts and what reportedly happened in China is that these genome editing trials involve cells from the patient’s body. The manipulations are not transmissible to the next generation. These trials are in their early stages, and we don’t yet have results to show whether this type of editing is safe or provides effective treatment. But whatever happens, the consequences are confined to the patient, who has consented to the experimental treatment.

While there have been reports of human embryo editing experiments in laboratory petri dishes, until now, so far as we know, none of these embryos have been implanted in humans. Here the hazards become markedly amplified because the editing intervenes in so-called germ line cells that are transmitted from one generation to another. Conceivably every cell in the body, some 37 trillion, could be programmed with the edits.

In the Chinese study, led by He Jiankui, a physicist, not a medical doctor, on the faculty of Southern University of Science and Technology in Shenzhen, the targeted gene was CCR5, which helps enable H.I.V. to enter cells. While preventing this intrusion might sound like an advance in the fight against AIDS, it is completely unnecessary and may even carry the hazard of increasing the subject’s susceptibility to other types of infection, such as influenza and West Nile fever. Previous genome editing studies have shown it is possible to disable the CCR5 gene in adults without working at the embryo level. So the experiment was not necessary, had no scientific basis and must be considered unethical when balanced against the known and unknown risks.

The predominant risks are the potential impacts of the editing on other letters of the genome, which could induce diseases later in life even if they aren’t present at birth. Although the technology is promising, we don’t have the assurance that Crispr provides laserlike precision in editing. We know, for example, that certain important genes for suppressing cancer are particularly susceptible to unintended editing. The way we assess this risk is to sequence the genome before and after editing, to see whether changes were made in genes other than the target gene. But our ability to discern these changes is still rudimentary, and it is entirely likely that we will miss something. The fact that we may not have seen unintended mutations brought about by editing is by no means proof of their absence. With six billion letters in the genome that could be affected, the risk of unintended, “off target” editing is considerable and requires extensive scrutiny to understand and mitigate. That’s partly why editing the genes of human embryos is prohibited in the United States and banned in many European countries.

Even beyond the actual editing, this episode appears to have been marked by breaches of scientific conduct. One issue is informed consent. It is unclear whether the parents were told that there were simple ways to protect the embryos from AIDS that might have been transmitted by the H.I.V.-infected father. Given that, why would they consent to this risky procedure?

Moreover, no report by the researchers has been produced for the biomedical community to review. Through a journalist reporting about this, I had the opportunity to see some of the data, and there’s little question that Dr. He at least attempted to edit the genomes of the embryos. But no sequencing data has been presented or independently assessed. Nor has data been released to show whether the targeted gene was functionally disabled, which would require cell experiments. Science demands such transparency, but all we have is a YouTube video by the researcher, who makes the bold claim that “the gene surgery was safe”.

Dr. He’s university has disavowed knowledge or support of the research and said an investigation is underway. It said his “conduct in utilizing CRISPR/Cas9 to edit human embryos has seriously violated academic ethics and codes of conduct”.

It is difficult to envision a foolproof way to rein in such rogue efforts, notwithstanding the international consensus that we are still nowhere near ready for genome-edited babies. Certainly scientists like Dr. He should be castigated by their institutions and the biomedical community, as he was in this case, and perhaps that will discourage this sort of unethical research. Governments should also condemn these practices and impose significant penalties, like pulling research funding and making these scientists ineligible for more.

At this point, we don’t know whether the intended human genome editing was achieved in the twins and have no idea whether it will prove to be safe if it was accomplished. But we can conclude that this was a misguided, reckless demonstration of using powerful gene-altering tools to create edited human beings. We should not proceed down this road until we know far more about the consequences of what we are doing.

Eric J. Topol is a cardiologist and director and founder of the Scripps Research Translational Institute, which focuses on providing individualized medical care using human genomics and digital technologies.

Menu

Home

News

News Archive

News Reviews

Videos

Articles

GM Myth Makers

GM Reports

GM Myths

GM Quotes

How Donations Will Help Us

Contacts

Contact Us

About

Facebook

Twitter

RSS

Content 1999 - 2021 GMWatch.
Web Development By SCS Web Design