My Lords, I will speak to Amendments 20, 22 and 23 in this group, with reference to Amendment 21. I am afraid that, much as I dislike it, I have a difference of opinion with the Minister.
I want to make it clear at the start that this is not in any case an attack on his probity. I think he is completely honourable and honest, and is trying to do the same job that I am: to protect the environment and make certain that we do not release organisms that might be harmful to the environment.
Noble Lords will remember that, when we finished on Monday night—it seems so long ago—unfortunately the Minister had to rush through a statement rather hurriedly and we did not complete our discussion of that statement. Since then, I have had a chance to go through the literature that I am concerned about.
The first thing to say very clearly is that, in spite of the assertions in the advice that the Minister has been given, those assertions are not correct. In fact, there is a serious issue around the introduction of foreign DNA into an organism using gene-editing technology, particularly CRISPR and particularly CRISPR-Cas9, which is the commonest one that has been used in plants.
Let me make it very clear that I do not in any way hold shame or blame toward the noble Lord, Lord Benyon. He is doing his absolute best in a very difficult area. As someone who has been practising genetics for over 40 years and doing modification of genes in various animal species, I find some of these concepts still complex myself. But from the publications on CRISPR technology—I will table a number of recently published papers, many of them not from Britain admittedly but from across the world—we can very clearly see that CRISPR leaves the organism vulnerable to the introduction of foreign technology. This has been particularly shown not only in the sort of animals I deal with, which are laboratory animals, but in the animals that we are most interested in in the Bill—farm animals, which are livestock.
There are a number of publications that I could quote from, but noble Lords will have to forgive me because, although my notes are written in large print, I had an injection in my eye today so I cannot really see what I am doing. However, I can see with pleasure the Minister across the Chamber, smiling at me. I am smiling at him too, because it is not sensible to have an aggressive argument on this; this is something that we have to come to agreement on because we both agree that this whole business is for the public good. There were relevant publications from Crispo et al. in 2015, Kim et al. in 2015, Tsai et al. in 2015, Wang X et al. in 2015, Carey in 2019, Zou in 2019, Musser in 2020, and Zuccaro in the last year or so. Zuccaro is particularly interesting, having been working in a field that I am interested in, the human embryo, but this is a model for all mammalian embryos. There is no fundamental difference between those embryos and what we are saying about humans.
Previous studies have found thousands of off-target mutations in gene-edited cells, embryos and animals. They raise the importance of investigating in-depth the gene-editing process and what it leaves behind. As the Bill stands at the present time, we would be at risk of releasing into the environment animals with changes in their genes which might be fundamentally different and in some ways damaging. For example—and this may sound ridiculous but I do not think it is at all—for the last two or three years, humans have been threatened by one of the most difficult viruses that we
have come across: the coronavirus. We know that the virus was transmitted through animals—pangolins, probably, through the bat. Having been transferred through animals, it then changed significantly and damaged human health. This is a genuine and understated serious threat to human health. I do not think that it is likely, but it is possible and, at the very least, we must consider this very seriously and do everything that we can concerning the risks involved with the technology.
As I described on Monday, there is no doubt that we might have problems with regard to making a herd that seems immune to one disease but, in consequence, is susceptible to another. That is seen very clearly in human health. For example, we know that, in places such as Sardinia and Cyprus, blood dyscrasia causes massive numbers of children to die, usually in their teens, from beta thalassemia. We could probably control this by gene therapy: we could change that gene to make people immune but, if we did so, they would then be vulnerable to another disease, malaria, which is likely to hit Sardinia with climate change and which kills over a million people a year.
There is a real issue around how, if we change the balance of nature with these gene-edited animals, we might do things which we cannot calculate with any proper basis. I suggest that I table those papers for the Minister to look at, but I will refer to one particularly significant paper, Improvements in Gene Editing Technology: Boost Its Applications in Livestock. It is entirely on his side. I have chosen it because it is by authors who, like the Minister—and me, to some extent—favour this sort of work in livestock.
I can leave this paper on the table, but I know I am not allowed to wave it—that is out of order in the House of Lords, but I am waving it anyway, because nobody is shouting “Order!” This paper is from a group of authors who are in favour of this technology, like we are, but who are also very concerned about the risks. They argue that more research needs to be done before we start to implement this, particularly in animals, in my case—I have insufficient knowledge about plant biology; I think I did S-level botany at school, but I was not a great botanist. I do not pretend to be a botanist, but I know more about animals, having worked with them for so long. I know that this is clearly something we can see in the mouse model we use, but also in another animal. I have chosen the pig, because it is one animal whose genes I have tried to change, using more conventional methods, and I know how unreliable that is. The same problems arise again and again.
Let me try to explain the difficulty biologically. One of the problems is that CRISPR-Cas9 and various other technologies, in order to make the genome or animal more vulnerable to change, have to cause a double-stranded split in the DNA—a so-called DSB. That is how we insert or change the DNA that then becomes attached. That was one of the reasons why, on Monday, I asked the Minister whether he was concerned about the use of radiation and CRISPR together. One of the ways that mutations occur in humans, as we know from examples such as Hiroshima, is that X-radiation and gamma radiation cause these cuts in the DNA, which later cause cancer and other genetic abnormalities. It improves the chances of CRISPR
working, but it may also result in making not only the advantages but also the disadvantages more likely to occur.
I am saying with these amendments, in simple terms, that as responsible humans, politicians, scientists and revisers, we have to argue the delay of this technology until we have more data. This group of amendments clearly suggest to the Government that we would be derelict in our duty if we did not make certain that the animals we are releasing into the environment have the genome that we think they have but which we have not checked. My argument is that, to do this, we have to go through the laborious process of sequencing the genome of these animals before they are introduced. We also have to look at their phenotype. Of course, their phenotype may look normal, but underneath there might be things that are seriously threatening to the planet. That is our responsibility.
The noble Lord is absolutely right—and I am grateful to him for saying this—that this is one area that we really understand in Britain. After all, we were ahead of the game when it came to sequencing the human genome and on the structure of genes. For example, Watson and Crick were at Cambridge. We have to recognise that this is a long tradition in our science. We can go on talking about Argentina, and the Argentinians have a very good reason for wanting to do this, as the noble Lord implied; not unreasonably, they want the commercial advantages. Correct me if I am wrong; there have certainly been some Nobel Prize winners from Argentina, but none in this field of molecular biology, unlike Watson and Crick, which is applicable. We have to recognise that this is something we work on very seriously in British universities, in a way that is not easily done in many other places. There is a great deal of expertise here.