Gene Drive in the News
A curated collection of articles from the popular press
Fighting Dengue Virus with Biological Weapons
19130Z. Ebrahim, Inter Press Service, 2021-11-02 14:34:03.
For the last 11 years, he has been trying to convince both the provincial and central governments of making “billions of mosquitoes in labs”, which when released in the wild, could reduce the spread of dengue virus, but with little luck. The released genetically engineered male (only) mosquitoes, when they mate with Aedes females (also the carrier of the virus), would produce offspring that would die while still at larvae or pupae stage, explained Ali, the only Pakistani with a doctorate in genetically modified mosquitoes. In addition, genetic modifications, he said, can also shorten the life span, cause sterility and even death of the transformed Aedes species. However, those who can decide have dawdled for too long with the result that the virus has gone out of control, he remarked. He has been trying to draw attention but with little success. “They [government officials] tell me if word gets out the government was fighting the virus by letting loose even more mosquitoes, they will have to confront the wrath of the public!”
Wolbachia goes to work in the war on mosquitoes
19076S. Ong, Nature, 598:S32-s34. 2021-10-29 20:37:48.
There are two approaches to tackling dengue with Wolbachia. The first involves releasing only modified male mosquitoes. Since 2015, this strategy has been successfully adopted in Singapore and Guangzhou, China, and in parts of the United States, such as Miami, Texas and California. Because eggs produced from unmodified females that mate with modified males do not hatch, the number of mosquitoes in the community is greatly reduced. The second approach, used by some cities in Vietnam, Indonesia, Malaysia, Brazil and Australia, among others, involves releasing modified mosquitoes of both sexes. The infected females pass the bacteria to their offspring. Over time (several months to years, depending on characteristics of the release site), the modified mosquitoes replace the native population.
European Parliament adopts text on biodiversity, calls for no releases of gene drive organisms
19071Third World Network, TWN Biosafety Briefing, 2021-10-27 20:24:55.
Gene drive technologies, such as GM mosquitoes for the control of vector-borne diseases, pose serious and novel threats for the environment and nature, including irreversible changes to food chains and ecosystems, and losses of biodiversity, on which the world’s poorest depend for their livelihoods; therefore reiterates concern about the new legal, environmental, biosafety and governance challenges that might arise from the release of genetically engineered gene drive organisms into the environment, including for nature conservation purposes; reiterates that the free, prior and informed consent of IPLCs must be sought and obtained prior to the release of any technologies which may impact on their traditional knowledge, innovation, practices, livelihoods and use of land, resources and water; stresses that this must be done in a participatory manner involving all potentially affected communities prior to any deployment. Given that gene drive technologies raise concerns about the difficulties of predicting their behaviour, and that gene drive organisms could become invasive species; therefore considers that no releases of genetically engineered gene drive organisms should be permitted, including for nature conservation purposes, in line with the precautionary principle.
A Golden Menace
19202S. Moutinho, Science, 2021-10-21 14:46:14.
An even bigger catastrophe looms: the invasion of the Amazon and its tributaries, part of the largest drainage basin in South America, which spans eight countries and is one of the richest hot spots for biodiversity on the planet. Golden mussels have been documented in the Pantanal wetlands just 150 kilometers from the Téles Pires River, which flows into the Amazon basin and connects to the Tapajós River, a tributary of the Amazon.“It only takes one boat encrusted with the mussel to cross the wetlands for the invader to make a new home in an Amazon river,” says biologist Marcia Divina at the state-owned Brazilian Agricultural Research Corporation. If the invader spreads in the Amazon, it could wipe out native species that scientists have not even studied yet, she adds. “We can’t even calculate the size of the impact.”Despite a late and anemic government response, researchers funded largely by affected hydroelectric companies have developed new tools to track the mussels’ relentless advance. And some are looking to an aggressive form of genetic engineering to eradicate it. That untested strategy is still likely years from being ready to deploy, but scientists see few other ways to slow an invader so easily spread by human transit and trade.
Sterilizing Male Mosquitoes with Gene Editing to Reduce Disease Spread
18938Global Biodefense Staff, Global Biodefense, 2021-10-11 20:42:18.
Researchers at the Army’s Institute for Collaborative Biotechnologies and the University of California Santa Barbara used a gene editing tool known as CRISPR-Cas9 to target a specific gene tied to fertility in male mosquitoes. Researchers experimented with the Aedes aegypti mosquitoes, which are found in tropical, subtropical and temperate regions throughout the world. The study, published in the Proceedings of the National Academy of Sciences, discerned how a mutation can suppress the fertility of female mosquitoes. To manage populations, scientists use a vector-control practice called the sterile insect technique in which they raise a lot of sterile male insects and they then release these males in numbers that overwhelm their wild counterparts. Females that mate with sterile males before finding a fertile one are themselves rendered infertile, thereby decreasing the size of the next generation. Repeating this technique several times has the potential to crash the population because each generation is smaller than the last; releasing a similar number of sterile males has a stronger effect over time.
Fighting the world’s most deadly animal: the mosquito
19227M. Rozenbaum, Understanding Animal Research, 2021-10-09 21:50:46.
n the first, sterile male mosquitos are mass produced and released into the wild. These sterile males mate with wild females who then lay sterile eggs which will not hatch. This approach has been shown to reduce wild populations by as much as 90% in trials with Aedes aegypt. The second approach is to introduce a gene that, if inherited, results in the death of the female, but not the male. Genetically modified males are mass produced and released. Only male offspring from matings between the modified males and wild females survive. They go on to breed, further spreading the female-killing gene and reducing the overall mosquito population. Genetically modified mosquitoes have been successfully used in parts of Brazil, the Cayman Islands, Panama, and India to control Ae. aegypti mosquitoes. Since 2019, over one billion GM mosquitoes have been released. When genetically modified mosquitoes stop being released into an area, the Ae. aegypti mosquito population slowly returns to normal levels, so control requires regular release of modified mosquitos.
Trial suppresses mosquitoes using non-GMO approach
18863GM Watch, GM Watch, 2021-10-07 18:51:46.
In a first for the Southern Hemisphere, researchers have shown that a bacterium can successfully suppress populations of the invasive, disease-carrying Aedes aegypti mosquito that is responsible for spreading dengue, yellow fever and Zika. Published in PNAS (see abstract below), the trial involved releasing three million male Aedes aegypti mosquitoes in Northern Queensland, sterilised with a naturally occurring bacterium called Wolbachia, across three trial sites over a 20-week period during the summer of 2018. The sterile male insects search out and mate with wild females, preventing the production of offspring. Scientists returned the following year and found one of the trial sites, Mourilyan in Queensland, was almost devoid of mosquitoes.
Invasive, disease-carrying Aedes aegypti mosquito sterilized with bacteria and eradicated in large-scale trial
18872CSIRO, Phys Org, 2021-10-05 19:15:01.
In a first for the Southern Hemisphere, researchers have shown a bacteria can successfully sterilize and eradicate the invasive, disease carrying Aedes aegypti mosquito which is responsible for spreading dengue, yellow fever and Zika. The breakthrough could support the suppression and potential eradication of Aedes aegypti worldwide. Published today in PNAS, the landmark trial involved releasing 3 million male Aedes aegypti mosquitoes in Northern Queensland sterilized with bacteria called Wolbachia. The trial was conducted across three sites over a 20-week period during the summer of 2018. The sterile male insects search out and mate with wild females, preventing the production of offspring.
Stakeholders call for adoption of emerging technologies to fight Malaria
18869C. Muchira, KBC, 2021-10-05 19:08:06.
Health stakeholders are calling for adoption of innovative and emerging technologies such as gene drive to change the focus of the war on malaria from just controlling its spread to actual elimination. The African Institute for Development Policy and other stakeholders have urged the government to allocate adequate resources to boost initiatives by institutions in fighting malaria and improve health.According to a 2020 World Health Organization report, in 2019, 229 million people were infected with Malaria in 87 malaria endemic countries. The African Region recorded an estimated 215 million cases in 2019 which accounted for about 94% of cases including Nigeria (27%), the Democratic Republic of the Congo (12%), Uganda (5%), Mozambique (4%) and Niger (3%) accounted for about 51% of all cases globally. Although milestones have been made, the persisting high rates of illnesses and deaths have called for concerted efforts towards malaria elimination.
Plan for California’s Genetically Modified Mosquitoes Draws Fire
18813T. Baltz, Bloomberg Law, 2021-09-29 15:13:31.
A U.K.-based biotech company’s proposal to release genetically engineered mosquitoes in California as a disease-control measure is prompting criticism that the program could create unnatural consequences. Oxitec says it would unleash safe, non-biting male mosquitoes to reduce the population of mosquitoes that spread dengue, Zika, yellow fever, and other diseases. It applied in August for an Environmental Protection Agency permit to release the genetically modified organisms, or GMOs, for pilot projects in the state. Opponents say the company’s plan lacks rigorous assessments of potentially serious health and environmental impacts, and could have “disastrous consequences” in the U.S. and other countries. ...
Genetically-modified possums and all-in-one trapping machines: funding for new predator-free studies
18787A. Allott, stuff, 2021-09-24 13:32:23.
Research into possum genes and creating an all-in-one predator detecting, luring, and trapping machine are among a handful of projects to receive new funding to help bring them into reality. Predator Free 2050 has awarded $2.4 million in Jobs for Nature funding to six postgraduate and post-doctoral researchers from Otago, Canterbury, Lincoln and Auckland universities. University of Otago researcher Alana Alexander, who is trying to discover which genes are important for possums’ reproduction and survival, is one of them. “Gene drives seem very exciting, but they’re a genie in a bottle. We don’t really want possums in New Zealand, but they are part of the ecosystem in Australia, so making sure it’s contained would be really important.” Alexander said she wants people to understand the risks and benefits, so they can give informed consent when thinking about pest control down the line.
Weltnaturschutzunion sucht Position
18803Anonymous, Informationsdienst Gentechnik, 2021-09-22 19:07:43.
Die Weltnaturschutzunion IUCN will in den nächsten drei Jahren eine breite interne Diskussion führen, ob Gentechnik und Gene Drives im Naturschutz eingesetzt werden sollen. Mit diesem Beschluss ist der Versuch gentechnikfreundlicher Organisationen, mit Artenschutz-Argumenten neuen gentechnischen Verfahren die Tür zu öffnen, vorerst abgewehrt. Der 1948 gegründeten International Union for Conservation of Nature gehören über 1300 staatliche und nichtstaatliche Naturschutzorganisationn aus aller Welt an. Sie trafen sich Mitte September in Marseille zu ihrem Weltnaturschutzkongress und verabschiedeten dabei mit der Resolution Nummer 75 auch einen Fahrplan, um zu einer „IUCN-Politik zur synthetischen Biologie in Bezug auf den Naturschutz“ zu gelangen. Der Begriff synthetische Biologie umfasst dabei alle gentechnischen Verfahren, mit denen biologische Systeme künstlich konstruiert oder umgestaltet werden.
Calling the latest gene technologies ‘natural’ is a semantic distraction — they must still be regulated
18752J. A. Heinemann, D. J. Paull, S. Walker and B. Kurenbach, The Conversation, 2021-09-22 13:41:22.
Legislators around the world are being asked to reconsider how to regulate the latest developments in gene technology, genome editing and gene silencing. Both the European Court of Justice and the New Zealand High Court have ruled that genome editing techniques should remain under the regulations specific to genetically modified organisms. But a few other countries, including Australia, have exempted some uses of these techniques from their regulations, based on similarities to what occurs in nature. The main argument is that the biochemical processes of editing are like the processes that cause natural mutations. The “equivalent to nature” narrative blurs the boundary between natural processes and technology.
New report demands moratorium on gene drives
18792GM Watch, GM Watch, 2021-09-21 13:49:44.
To help the public understand what's at stake, the Germany-based NGO Save Our Seeds (SOS) has published a report, "Gene Drives: The New Dimension of Genetic Engineering", which can be downloaded as a pdf document. The report provides a scientifically founded overview of how gene drive systems work, their possible areas of application, and the scientific discussion about their risks. It summarises the status of legislation and regulation at the German, European and global levels and recommends urgent political measures. The report explains how gene drives could be used in agriculture – research is focused on controlling pests and weeds and reversing the herbicide resistance in weeds that was caused and exacerbated by the spread of GM herbicide-tolerant crops. Not coincidentally, the report also notes that gene drives could be employed as bioweapons – for example, to eradicate beneficial insects in a region. The report points out, "The US military‘s Defense Advanced Research Projects Agency (DARPA) is one of the largest funders of gene drive research and is financially involved in almost every gene drive research project."
Gene Drive Organisms: A new dimension of genetic engineering
18790V. Henn and M. Imken, Save Our Seeds, 2021-09-21 13:42:53.
Enabled by new genetic engineering techniques such as CRISPR/Cas9, so-called gene drives have been developed in recent years that enable humans to spread new genes throughout the genome of wild animal populations. Gene drives force the inheritance of newly introduced genes to be inherited by all offspring, even if this lowers the survival chances of the affected species. In the most extreme case, gene drive technology could drive an entire species to extinction or replace wild populations with genetically modified organisms.
Malaria and the future of mosquito control
18712E. Gonzalez Fernandez, CATALYST, 2021-09-18 14:01:52.
Focusing on mosquito population control, new strategies based on genetic approaches have emerged with the premise of being more eco-friendly. The aim is to not harm the environment or affect other animals since they will only target a specific mosquito species. Genetic control strategies depend on the introduction of an inheritable trait into the wild type population. There are two main outcomes, the suppression, or the replacement of the insect population. In the first one, the new trait leads to a reduction of their population. In the second one, the existing mosquito population is replaced with mosquitoes that have the new characteristic, making the mosquito, for example, unable to transmit the pathogen (refractoriness), the latter doesn’t reduce the number of mosquitoes in the area. The discovery of CRISPR/Cas9, recently awarded the Nobel Prize, has opened an incredible path in genetics and is the fundamental pillar for the new strategies under development for mosquito control. Specifically, the so-called gene drive systems benefit from the CRISPR/Cas9 technology. These gene drive systems aim to spread the new trait into the population in a super-Mendelian way. It means that the gene drive encourages unbalanced inheritance in favour of the new trait, so the new trait is passed on to off-spring so the new would make the ‘old’ disappear in a short period of time. And, as previously mentioned, these could be by reducing or replacing
Scientists use gene editing tool to target mosquito-spread disease
18650Medical Research Council, Phys Org, 2021-09-13 20:12:56.
Advances in genome editing have allowed the development of genetic insect control methods, which could be highly effective and are species-specific. The results have been published in Scientific Reports. Scientists showed that a method involving a gene editing tool called CRISPR/Cas9 could be used to successfully introduce a gene for a fluorescent protein into the genome of southern house mosquitoes. The gene could be passed on to the next generation through mating. This is a vital component of generating genetic pest management tools. It will allow the desired traits (such as the inability to spread a disease or produce fertile offspring) to be spread throughout a population. The inserted gene produces red fluorescence proteins so that mosquitoes with one or more edited gene fluoresce red. Scientists targeted an eye color gene for the insertion site of the fluorescence gene so mosquitoes that inherited two edited genes from their parents would have white eyes, not black. Both these traits make it easier for scientists to easily identify mosquitoes whose genomes had been modified.
Mosquitoes Sterilized by CRISPR Powered Precision System
18648A. A. Sarkar, Genetic Engineering & Biotechnology News, 2021-09-13 20:06:53.
Each year millions around the world are infected by dengue, chikungunya, and Zika viruses. The principal culprit behind the transmission of these deadly diseases is the mosquito vector, Aedes aegypti. Conventional methods of pest control have so far fallen short. To curb the spread of A. aegypti, researchers at the University of California, San Diego (UCSD), have now developed a CRISPR-based molecular genetic control system called precision-guided sterile insect technique (pgSIT) that alters insect genes to generate flightless female and sterile male mosquitoes. The pgSIT system can be deployed effectively at any stage in the life cycle of the mosquito. The authors used mathematical models to empirically demonstrate that once released, male A. aegypti mosquitoes sterilized using the pgSIT system can compete, suppress, and eliminate fertile mosquito populations in the wild. The pgSIT system is not limited to restricting mosquito populations, it can be adapted to different vectors to curb transmissible diseases in a safe, confinable, and reversible manner, the authors claim. These findings are reported in the Nature Communications article, “Suppressing mosquito populations with precision guided sterile males.”
Faut-il miser sur le forçage génétique contre les espèces invasives?
18933P. Minet, Le Temps, 2021-09-12 19:51:46.
Un «gene drive» peut servir à annihiler complètement et rapidement une population d’animaux indésirables. Prometteuse pour lutter contre les espèces invasives, cette technologie a fait l’objet d’âpres débats dans le cadre du congrès mondial de la nature à Marseille. Cela peut paraître paradoxal: dans certaines situations, la protection de la biodiversité passe par l’anéantissement d’une espèce. C’est le cas lorsque des écosystèmes fragiles sont confrontés à l’irruption d’un animal ou d’une plante originaire d’une autre zone géographique, et qui a le potentiel de détruire ou de supplanter les espèces locales. L’exemple typique est celui de nombreuses îles où des rats introduits par l’être humain déciment les oiseaux en mangeant leurs œufs.
To exterminate, or not to: Scientists debate tweaking wild genomes
18529French Press Agency, Daily Sabah, 2021-09-12 16:11:31.
veryone remembers Jeff Goldblum's famous speech in 1993 classic Jurassic Park: “Your scientists were so preoccupied with whether they could, they didn't stop to think if they should.” Well, these scientists are debating whether one should. In the movie, reconstructing and tweaking genetic material had made it possible to bring dinosaurs back to life. Today, a technology that manipulates animal genomes, called gene drive, has become a reality. The goal, however, is not to revive long-gone species, but to eliminate invasive ones. Steven Spielberg's film was set on an imaginary island off the coast of Costa Rica, and it is also on an island that the first open-air experiments in programmed extinction could take place, according to experts gathered at the International Union for the Conservation of Nature (IUCN) Congress in Marseille. It could happen within a decade, they told Agence France-Presse (AFP). That's because fragile island ecosystems are in crisis. Dozens of vertebrate species have vanished in the last century, and dozens more are on a glide path to extinction. The culprits are non-native rats, snakes and mosquitoes – all introduced by humans, for the most part by accident – that eat bird eggs, infect birds with disease, or outcompete indigenous amphibians and mammals. For more than 20 years, Island Conservation has been working to eradicate rodents and other invasive alien species, which are a major threat to biodiversity globally, the organization's Royden Saah told AFP. The conservation NGO has been successful on two Galapagos islands – Seymour North and Mosquera – using traps and poison-delivering drones. But species eradication using these tools is costly and has no guarantee of success. Rat poison is effective, but poses risks to other species.
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