Keywords: Cas 9
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Gene drive and genetic sex conversion in the global agricultural pest Ceratitis capitataA. Meccariello, S. Hou, S. Davydova, J. Fawcett, A. Siddall, P. Leftwich, T. , F. Krsticevic, P. A. Papathanos and N. Windbichler, bioRxiv, 2023.08.16.553191. 2023.
Homing-based gene drives are novel interventions promising the area-wide, species-specific genetic control of harmful insect populations. Here we characterise a first set of gene drives in a tephritid agricultural pest species, the Mediterranean fruit fly Ceratitis capitata ... |
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New germline Cas9 promoters show improved performance for homing gene driveD. Jie, C. Weizhe, J. Xihua, X. Xuejiao, Y. Emily, Z. Ruizhi, Z. Yuqi, M. Matt, W. M. Philipp and C. Jackson, bioRxiv, 2023.07.16.549205. 2023.
Gene drive systems could be a viable strategy to prevent pathogen transmission or suppress vector populations by propagating drive alleles with super-Mendelian inheritance. CRISPR-based homing gene drives, perhaps the most powerful gene drive strategy, convert wild type alleles ... |
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Anti-CRISPR Anopheles mosquitoes inhibit gene drive spread under challenging behavioural conditions in large cagesA. Simoni, R. D'Amato, C. Taxiarchi, M. Galardini, A. Trusso, R. Minuz, S. Gilli, A. Somerville, D. Shittu, A. Khalil, R. Galizi and R. Muller, Research Square, 2023.
CRISPR-based gene drives have the potential to spread within a population and are considered as promising vector control tools. A doublesex-targeting gene drive was shown effective to suppress laboratory populations in both small and large cages, and it is considered for field ... |
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CRISPR-based genetic control strategies for insect pestsY. Yan, R. A. Aumann, I. Hacker and M. F. Schetelig, Journal of Integrative Agriculture, 22:651-668. 2023.
Genetic control strategies such as the sterile insect technique have successfully fought insect pests worldwide. The CRISPR (clustered regularly interspaced short palindromic repeats) technology, together with high-quality genomic resources obtained in more and more species, ... |
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Simulations Reveal High Efficiency and Confinement of a Population Suppression CRISPR Toxin-Antidote Gene DriveY. Zhu and J. Champer, ACS Synthetic Biolog, 2023.
Though engineered gene drives hold great promise for spreading through and suppressing populations of disease vectors or invasive species, complications such as resistance alleles and spatial population structure can prevent their success. Additionally, most forms of suppression ... |
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Genetic conversion of a split-drive into a full-drive elementG. Terradas, J. B. Bennett, Z. Li, J. M. Marshall and E. Bier, Nature Communications, 14:191. 2023.
The core components of CRISPR-based gene drives, Cas9 and guide RNA (gRNA), either can be linked within a self-contained single cassette (full gene-drive, fGD) or be provided in two separate elements (split gene-drive, sGD), the latter offering greater control options. We ... |
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Researchers Create New System for Safer Gene-Drive Testing and DevelopmentM. Aguilera, UC San Diego Today, 2023.
In the journal Nature Communications, University of California San Diego researchers led by former Postdoctoral Scholar Gerard Terradas together with Postdoctoral Scholar Zhiqian Li and Professor Ethan Bier, in close collaboration with UC Berkeley graduate student Jared Bennett ... |
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Assessment of distant-site rescue elements for CRISPR toxin-antidote gene drivesJ. Chen, X. Xu and J. Champer, bioRxiv, 2023.01.06.522951. 2023.
New types of gene drives promise to provide increased flexibility, offering many options for confined modification or suppression of target populations. Among the most promising are CRISPR toxin-antidote gene drives, which disrupt essential wild-type genes by targeting them with ... |
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CRISPR Gene Drives: A Weapon of Mass Destruction?J. Ng, Medium, 2022.
Gene drives allow scientists to “drive” new genes — and their associated traits — into wildlife populations at unprecedented rates. Here’s a simplified explanation of how gene drives work. In normal sexual reproduction between species with two copies of chromosomes, ... |
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Gene editing and agrifood systemsFAO, FAO, 2022.
Gene-editing technologies represent a promising new tool for plant and animal breeding in low- and middle-income countries. They enhance precision and efficiency over current breeding methods and could lead to rapid development of improved plant varieties and animal breeds. ... |
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Performance characteristics allow for confinement of a CRISPR toxin-antidote gene drive designed for population suppressionS. Zhang and J. Champer, bioRxiv, 2022.12.13.520356. 2022.
Gene drives alleles that can bias their own inheritance are a promising way to engineer populations for control of disease vectors, invasive species, and agricultural pests. Recent advancements in the field have yielded successful examples of powerful suppression type drives and ... |
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Bioinformatic and literature assessment of toxicity and allergenicity of a CRISPR-Cas9 engineered gene drive to control the human malaria mosquito vector Anopheles gambiaeA. Qureshi and J. B. Connolly, Malaria Journal, 2022.
Population suppression gene drive is currently being evaluated, including via environmental risk assessment (ERA), for malaria vector control. One such gene drive involves the dsxFCRISPRh transgene encoding (i) hCas9 endonuclease, (i) T1 guide RNA (gRNA) targeting the doublesex ... |
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A CRISPR endonuclease gene drive reveals distinct mechanisms of inheritance biasS. A. N. Verkuijl, E. Gonzalez, M. Li, J. X. D. Ang, N. P. Kandul, M. A. E. Anderson, O. S. Akbari, M. B. Bonsall and L. Alphey, Nature Communications, 13:7145. 2022.
CRISPR/Cas gene drives can bias transgene inheritance through different mechanisms. Homing drives are designed to replace a wild-type allele with a copy of a drive element on the homologous chromosome. In Aedes aegypti, the sex-determining locus is closely linked to the white ... |
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CRISPR-Mediated Cassette Exchange (CriMCE): A Method to Introduce and Isolate Precise Marker-Less EditsI. Morianou, A. Crisanti, T. Nolan and A. M. Hammond, The CRISPR Journal, 2022.
The introduction of small unmarked edits to the genome of insects is essential to study the molecular underpinnings of important biological traits, such as resistance to insecticides and genetic control strategies. Advances in CRISPR genome engineering have made this possible, ... |
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Assessing single-locus CRISPR/Cas9-based gene drive variants in the mosquito Aedes aegypti via single generation crosses and modelingW. Reid, A. E. Williams, I. Sanchez-Vargas, J. Lin, R. Juncu, K. E. Olson and A. W. E. Franz, G3 Genes|Genomes|Genetics, 2022.
Critical to the design of a single-locus autonomous GD is that the selected genomic locus is amenable to both GD and appropriate expression of the antiviral effector. In our study, we used reverse engineering to target two intergenic genomic loci, which had previously shown to be ... |
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Combating Mosquito-Borne Diseases with CRISPRN. Spahich, The Scientist, 2022.
Female mosquitoes are some of the deadliest organisms in the world due to their ability to spread infectious diseases through a simple bite. Mosquito-borne diseases such as yellow fever, Zika, Dengue fever, and malaria kill millions of humans every year, and there are limited ... |
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Fitness effects of CRISPR endonucleases in Drosophila melanogaster populationsA. M. Langmüller, J. Champer, S. Lapinska, L. Xie, M. Metzloff, S. E. Champer, J. Liu, Y. Xu, J. Du, A. G. Clark and P. W. Messer, eLife, 11:e71809. 2022.
Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/Cas9 provides a highly efficient and flexible genome editing technology with numerous potential applications ranging from gene therapy to population control. Some proposed applications involve the integration of ... |
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Development of CRISPR/Cas9-Mediated Gene-Drive Construct Targeting the Phenotypic Gene in Plutella xylostellaM. Asad, D. Liu, J. Li, J. Chen and G. Yang, Frontiers in Physiology, 13:938621. 2022.
The gene-drive system can ensure that desirable traits are transmitted to the progeny more than the normal Mendelian segregation. The clustered regularly interspersed palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) mediated gene-drive system has been demonstrated ... |
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Gene Drives: A Potentially New Weapon Against MosquitoesM. Sherman, Times Union Online, 2022.
Scientists have studied gene drives for more than 50 years, and to most of us this has been a well-kept secret. The development of a powerful genome editing tool in 2012, CRISPR/Cas9,1 led to recent breakthroughs in gene drive research that built on that half century’s worth ... |
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Investigating CRISPR/Cas9 gene drive for production of disease-preventing prion gene allelesA. R. Castle, S. Wohlgemuth, L. Arce and D. Westaway, PLoS One, 17:e0269342. 2022.
Prion diseases are a group of fatal neurodegenerative disorders that includes chronic wasting disease, which affects cervids and is highly transmissible. Given that chronic wasting disease prevalence exceeds 30% in some endemic areas of North America, and that eventual ... |
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Gene Editing and Genetic Control of Hemipteran Pests: Progress, Challenges and PerspectivesI. D. Pacheco, L. L. Walling and P. W. Atkinson, Frontiers in Bioengineering and Biotechnology, 10. 2022.
The origin of the order Hemiptera can be traced to the late Permian Period more than 230 MYA, well before the origin of flowering plants 100 MY later in during the Cretaceous period. Hemipteran species consume their liquid diets using a sucking proboscis; for phytophagous ... |
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Intronic gRNAs for the Construction of Minimal Gene Drive SystemsA. Nash, P. Capriotti, A. Hoermann, P. A. Papathanos and N. Windbichler, Frontiers in Bioengineering and Biotechnology, 10. 2022.
Gene drives are promising tools for the genetic control of insect vector or pest populations. CRISPR-based gene drives are generally highly complex synthetic constructs consisting of multiple transgenes and their respective regulatory elements. This complicates the generation of ... |
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A New Approach to Develop Resistant Cultivars Against the Plant Pathogens: CRISPR DrivesM. I. Tek and K. Budak, Frontiers in Plant Science, 13. 2022.
CRISPR drive is a recent and robust tool that allows durable genetic manipulation of the pest population like human disease vectors such as malaria vector mosquitos. In recent years, it has been suggested that CRISPR drives can also be used to control plant diseases, pests, and ... |
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Expanding the flexibility of genome editing approaches for population control of the malaria mosquitoN. Kranjc, Imperial College London-PhD, 2022.
Discovery and adaptation of CRISPR-Cas systems for genome editing have allowed us to gain an efficient and yet simple tool for genetic manipulation in various fields of molecular biology and biotechnology. One of the most promising applications is the use of CRISPR-Cas9 ... |
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Toward a CRISPR-Cas9-Based Gene Drive in the Diamondback Moth Plutella xylostellaX. Xu, T. Harvey-Samuel, H. A. Siddiqui, J. X. D. Ang, M. E. Anderson, C. M. Reitmayer, E. Lovett, P. T. Leftwich, M. You and L. Alphey, The CRISPR Journal, 5:224-236. 2022.
Promising to provide powerful genetic control tools, gene drives have been constructed in multiple dipteran insects, yeast, and mice for the purposes of population elimination or modification. However, it remains unclear whether these techniques can be applied to lepidopterans. ... |
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CRISPR-mediated knockout of cardinal and cinnabar eye pigmentation genes in the western tarnished plant bugC. C. Heu, R. J. Gross, K. P. Le, D. M. LeRoy, B. Fan, J. J. Hull, C. S. Brent and J. A. Fabrick, Scientific Reports, 12. 2022.
The western tarnished plant bug, Lygus hesperus, is a key hemipteran pest of numerous agricultural, horticultural, and industrial crops in the western United States and Mexico. A lack of genetic tools in L. hesperus hinders progress in functional genomics and in developing ... |
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Considerations for homology-based DNA repair in mosquitoes: Impact of sequence heterology and donor template sourceJ. X. D. Ang, K. Nevard, R. Ireland, D.-K. Purusothaman, S. A. N. Verkuijl, L. Shackleford, E. Gonzalez, M. A. E. Anderson and L. Alphey, PLOS Genetics, 18:e1010060. 2022.
Author summary The field of genetic control of mosquito vectors has progressed rapidly in recent years, especially in Cas9-based control systems, due to its robustness to elicit a species-specific and dispersive control of mosquito population. To generate a Cas9-based ... |
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Could we delete diseases passed down through our DNA?E. Rayne, SYFY, 2022.
What has now been proven possible was once the stuff of science fiction dreams. CRISPR has shown it can successfully edit out detrimental genetic conditions before they are inherited — which could mean the beginning of the end for hereditary diseases. It could also help ... |
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Scientists expand CRISPR-Cas9 genetic inheritance control in mammalsM. Aguilera, Phys Org, 2022.
Led by graduate student Alexander Weitzel, Grunwald, Cooper and their colleagues have now succeeded in developing CRISPR-Cas9 inheritance control in male mice by shifting the gene editing window to more closely match the timing of meiosis in both sexes. Their results were ... |
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Reversing insecticide resistance with allelic-drive in Drosophila melanogasterB. Kaduskar, R. B. S. Kushwah, A. Auradkar, A. Guichard, M. Li, J. B. Bennett, A. H. F. Julio, J. M. Marshall, C. Montell and E. Bier, Nature Communications, 13:291. 2022.
A recurring target-site mutation identified in various pests and disease vectors alters the voltage gated sodium channel (vgsc) gene (often referred to as knockdown resistance or kdr) to confer resistance to commonly used insecticides, pyrethroids and DDT. The ubiquity of kdr ... |
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Meiotic Cas9 expression mediates gene conversion in the male and female mouse germlineA. J. Weitzel, H. A. Grunwald, C. Weber, R. Levina, V. M. Gantz, S. M. Hedrick, E. Bier and K. L. Cooper, PLOS Biology, 19:e3001478. 2021.
Highly efficient gene conversion systems have the potential to facilitate the study of complex genetic traits using laboratory mice and, if implemented as a “gene drive,” to limit loss of biodiversity and disease transmission caused by wild rodent populations. We previously ... |
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Exploiting a Y chromosome-linked Cas9 for sex selection and gene driveS. Gamez, D. Chaverra-Rodriguez, A. Buchman, N. P. Kandul, S. C. Mendez-Sanchez, J. B. Bennett, C. H. Sánchez, T. Yang, I. Antoshechkin, J. E. Duque, P. A. Papathanos, J. M. Marshall and O. S. Akbari, Nature Communications, 7202. 2021.
CRISPR-based genetic engineering tools aimed to bias sex ratios, or drive effector genes into animal populations, often integrate the transgenes into autosomal chromosomes. However, in species with heterogametic sex chromsomes (e.g. XY, ZW), sex linkage of endonucleases could be ... |
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Genomic insertion locus and Cas9 expression in the germline affect CRISPR/Cas9-based gene drive performance in the yellow fever mosquito Aedes aegyptiW. R. Reid, J. Lin, A. E. Williams, R. Juncu, K. E. Olson and A. W. E. Franz, bioRxiv, 2021.12.08.471839. 2021.
The yellow fever mosquito Aedes aegypti is a major vector of arthropod-borne viruses, including dengue, chikungunya, and Zika. A novel approach to mitigate arboviral infections is to generate mosquitoes refractory to infection by overexpressing antiviral effector molecules. Such ... |
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Gene editing used to create all-male or all-female litters of miceJ. Goodyer, Science Focus, 2021.
As males are unable to produce milk or lay eggs, the ability to breed cows and hens that produce all-female litters is likely to be high on most poultry and dairy farmers’ wish lists. Now, scientists at the Francis Crick Institute and the University of Kent have come a step ... |
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Genetic conversion of a split-drive into a full-drive elementG. Terradas, J. B. Bennett, Z. Li, J. M. Marshall and E. Bier, bioRxiv, 2021.12.05.471291. 2021.
Gene-drive systems offer an important new avenue for spreading beneficial traits into wild populations. Their core components, Cas9 and guide RNA (gRNA), can either be linked within a single cassette (full gene drive, fGD) or provided in two separate elements (split gene drive, ... |
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Gene editing used to create all-male or all-female mice littersA. Reis, European Scientist, 2021.
Researchers from the Francis Crick Institute and the University of Kent used gene-editing technologies to create male-only and female-only mice litters, according to a study published in Nature Communications (1). The authors also suggested ways in which this method could be used ... |
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Gene-editing used to create single sex mice littersThe Francis Crick Institute, Phys Org, 2021.
Scientists at the Francis Crick Institute, in collaboration with University of Kent, have used gene editing technology to create female-only and male-only mice litters with 100% efficiency. This proof of principle study, published in Nature Communications today, demonstrates how ... |
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Single-sex mice litters were created with 100% efficiency using gene editing.R. Silman, Brinkwire, 2021.
The Francis Crick Institute, in partnership with the University of Kent, has employed gene editing technology to construct 100% efficient female-only and male-only mouse litters. This proof-of-concept study, which was published today (Friday, December 3rd, 2021) in Nature ... |
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Lab animals: Gene-editing technology is used to create female-only and male-only mice litterstodayuknews, Today UK News, 2021.
Single-sex litters of mice — comprising only either female or male pups — have been produced by means of so-called CRISPR-Cas9 gene editing technology. The technique, developed by experts at the Francis Crick Institute and the University of Kent, works by inactivating embryos ... |
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Gene editing produces all-male or all-female litters of miceE. Pennisi, Science, 2021.
In some farmers’ ideal world, cows would birth only females, sows would bear no boars, and chicks would all grow up to be hens. Such sex ratios would stop them from killing millions of male animals, which don’t produce eggs or milk. Now, scientists are a step closer to this ... |
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CRISPR-Cas9 effectors facilitate generation of single-sex litters and sex-specific phenotypesC. Douglas, V. Maciulyte, J. Zohren, D. M. Snell, S. K. Mahadevaiah, O. A. Ojarikre, P. J. I. Ellis and J. M. A. Turner, Nature Communications, 12:6926. 2021.
Animals are essential genetic tools in scientific research and global resources in agriculture. In both arenas, a single sex is often required in surplus. The ethical and financial burden of producing and culling animals of the undesired sex is considerable. Using the mouse as a ... |
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CRISPR gene-drive systems based on Cas9 nickases promote super-Mendelian inheritance in DrosophilaV. Lopez del Amo, S. Sanz Juste and V. M. Gantz, bioRxiv, 2021.12.01.470847. 2021.
CRISPR-based gene drive systems can be used to modify entire wild populations due to their ability to bias their own inheritance towards super-Mendelian rates (>100%). Current gene drives contain a Cas9 and a gRNA gene inserted at the location targeted by the gRNA. These ... |
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Applying functional genomics to the study of lamprey development and sea lamprey population controlJ. R. York, R. E. Thresher and D. W. McCauley, Journal of Great Lakes Research, 47:S639-S649. 2021.
Lampreys are one of the few survivors of an ancient lineage of jawless vertebrates and have become an important study organism in numerous disciplines in the biological sciences, including evolutionary biology, embryology, ecology, physiology and biomedicine. At the same time, ... |
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Temperature-Inducible Precision-Guided Sterile Insect TechniqueN. P. Kandul, J. R. Liu and O. S. Akbari, CRISPR Journal, 14. 2021.
Releases of sterile males are the gold standard for many insect population control programs, and precise sex sorting to remove females prior to male releases is essential to the success of these operations. To advance traditional methods for scaling the generation of sterile ... |
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Modeling the efficacy of CRISPR gene drive for schistosomiasis controlR. E. Grewelle, J. Perez-Saez, J. Tycko, E. K. O. Namigai, C. G. Rickards and G. A. De Leo, bioRxiv, 2021.10.29.466423. 2021.
CRISPR gene drives could revolutionize the control of infectious diseases by accelerating the spread of engineered traits that limit parasite transmission in wild populations. While much effort has been spent developing gene drives in mosquitoes, gene drive technology in molluscs ... |
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Towards CRISPR/Cas9-based gene drive in the diamondback moth Plutella xylostellaX. Xu, T. Harvey-Samuel, H. Siddiqui, J. Ang, M. A. E. Anderson, C. Reitmayer, E. Lovett, P. T. Leftwich, M. You and L. Alphey, bioRxiv, 2021.10.05.462963. 2021.
Promising to provide powerful genetic control tools, gene drives have been constructed in multiple dipterans, yeast and mice, for the purposes of population elimination or modification. However, it remains unclear whether these techniques can be applied to lepidopterans. Here, we ... |
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Resistance to a CRISPR-based gene drive at an evolutionarily conserved site is revealed by mimicking genotype fixationS. Fuchs, W. T. Garrood, A. Beber, A. Hammond, R. Galizi, M. Gribble, G. Morselli, T.-Y. J. Hui, K. Willis, N. Kranjc, A. Burt, A. Crisanti and T. Nolan, PLOS Genetics, 17. 2021.
Author summary Gene drives have the potential to be applied as a novel control strategy of disease-transmitting mosquitoes, by spreading genetic traits that suppress or modify the target population. Many gene drive elements work by recognising and cutting a specific target ... |
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Mosquitoes Sterilized by CRISPR Powered Precision SystemA. A. Sarkar, Genetic Engineering & Biotechnology News, 2021.
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 ... |
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New precision-guided sterile insect technique designed to control disease-spreading mosquitoesE. Henderson, News Medical Life Sciences, 2021.
Leveraging advancements in CRISPR-based genetic engineering, researchers at the University of California San Diego have created a new system that restrains populations of mosquitoes that infect millions each year with debilitating diseases. The new precision-guided sterile ... |
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Genetic engineering tech promises to sterilize disease-spreading mosquitoesB. Hays, UPI, 2021.
Inspired by improvements in CRISPR-based genetic engineering, scientists have developed a more precise insect sterilization system to curtail, or even eliminate, disease-spreading Aedes aegypti mosquito populations. The so-called "precision-guided sterile insect technique," or ... |
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Genetic Engineering Technology Promises To Sterilize Disease-Spreading Mosquito PopulationsD. Gyllhem, VIGOURTIMES, 2021.
Inspired by improvements in CRISPR-based genetic engineering, scientists have developed a more precise insect sterilization system to curtail, or even eliminate, disease-spreading Aedes aegypti mosquito populations. The so-called “precision-guided sterile insect technique,” ... |
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New Technology Designed to Genetically Control Disease-spreading MosquitoesM. Aguilera, UC San Diego News Center, 2021.
Leveraging advancements in CRISPR-based genetic engineering, researchers at the University of California San Diego have created a new system that restrains populations of mosquitoes that infect millions each year with debilitating diseases. An illustration by study coauthor ... |
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Suppressing mosquito populations with precision guided sterile malesM. Li, T. Yang, M. Bui, S. Gamez, T. Wise, N. P. Kandul, J. Liu, L. Alcantara, H. Lee, J. R. Edula, R. Raban, Y. Zhan, Y. Wang, N. DeBeaubien, J. Chen, H. M. Sánchez C, J. B. Bennett, I. Antoshechkin, C. Montell, J. M. Marshall and O. S. Akbari, Nature Communications, 12:5374. 2021.
The mosquito Aedes aegypti is the principal vector for arboviruses including dengue/yellow fever, chikungunya, and Zika virus, infecting hundreds of millions of people annually. Unfortunately, traditional control methodologies are insufficient, so innovative control methods are ... |
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Gene drive escape from resistance depends on mechanism and ecologyF. Cook, J. J. Bull and R. Gomulkiewicz, bioRxiv, 2021.08.30.458221. 2021.
Gene drives can potentially be used to suppress pest populations, and the advent of CRISPR technology has made it feasible to engineer them in many species, especially insects. What remains largely unknown for implementations is whether anti-drive resistance will evolve to block ... |
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Versatile Applications of the CRISPR/Cas Toolkit in Plant Pathology and Disease ManagementM. S. Wheatley and Y. N. Yang, Phytopathology, 111:1080-1090. 2021.
New tools and advanced technologies have played key roles in facilitating basic research in plant pathology and practical approaches for disease management and crop health. Recently. the CRISPR/Cas (clustered regularly interspersed short palindromic repeats/CRISPR-associated) ... |
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Cas9-Mediated Gene-Editing in the Black-Legged Tick, Ixodes Scapularis, by Embryo Injection and ReMOT Control.A. a. P. Sharma, Michael N. and Reyes, Jeremiah B. and Chana, Randeep and Yim, Won C. and Heu, Chan C. and Kim, Donghun and Chaverra-Rodriguez, Duverney and Rasgon, Jason L. and Harrell, Robert A. and Nuss, Andrew B. and Gulia-Nuss, Monika,, Cell Reports, 2021.
Despite their capacity to acquire and pass on an array of debilitating pathogens, research on ticks has lagged behind other arthropod vectors, such as mosquitoes, largely because of a lack of genetic and molecular tools. CRISPR-Cas9 is transforming non-model organism research; ... |
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Gene drives gaining speedE. Bier, Nature Reviews Genetics, 2021.
Gene drives are selfish genetic elements that are transmitted to progeny at super-Mendelian (>50%) frequencies. Recently developed CRISPR–Cas9-based gene-drive systems are highly efficient in laboratory settings, offering the potential to reduce the prevalence of vector-borne ... |
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The Promise of Genetics and Genomics for Improving Invasive Mammal Management on IslandsB. T. Burgess, R. L. Irvine, G. R. Howald and M. A. Russello, Frontiers in Ecology and Evolution, 9. 2021.
Invasive species are major contributors to global biodiversity decline. Invasive mammalian species (IMS), in particular, have profound negative effects in island systems that contain disproportionally high levels of species richness and endemism. The eradication and control of ... |
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Resistance to a CRISPR-based gene drive at an evolutionarily conserved site is revealed by mimicking genotype fixationS. Fuchs, W. Garrood, A. Beber, A. Hammond, R. Galizi, M. Gribble, G. Morselli, T.-Y. Hui, K. Willis, N. Kranjc, A. Burt, T. Nolan and A. Crisanti, bioRxiv, 2021.
CRISPR-based homing gene drives can be designed to disrupt essential genes whilst biasing their own inheritance, leading to suppression of mosquito populations in the laboratory. This class of gene drives relies on CRISPR-Cas9 cleavage of a target sequence and copying ... |
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CRISPR/Cas-9 mediated knock-in by homology dependent repair in the West Nile Virus vector Culex quinquefasciatus SayD.-K. Purusothaman, L. Shackleford, M. A. E. Anderson, T. Harvey-Samuel and L. Alphey, Scientific Reports, 11:14964. 2021.
Culex quinquefasciatus Say is a mosquito distributed in both tropical and subtropical regions of the world. It is a night-active, opportunistic blood-feeder and vectors many animal and human diseases, including West Nile Virus and avian malaria. Current vector control methods ... |
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A Sterile Solution: How Crispr Could Protect Wild SalmonL. Abend, UNDARK, 2021.
In an attempt to prevent escaped fish from interbreeding with their wild counterparts and threatening the latter’s genetic diversity, molecular biologist Anna Wargelius and her team at the Institute of Marine Research in Norway have spent years working on ways to induce ... |
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Scientists develop new technology that gives greater control for managing malaria mosquitoesKeele University, Phy Org, 2021.
Researchers including a Keele University scientist have engineered an innovative approach to disable highly powerful genetic devices that control harmful insect populations. Dr. Roberto Galizi from Keele's School of Life Sciences was part of a research team that previously ... |
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A genetically encoded anti-CRISPR protein constrains gene drive spread and prevents population suppressionC. Taxiarchi, A. Beaghton, N. I. Don, K. Kyrou, M. Gribble, D. Shittu, S. P. Collins, C. L. Beisel, R. Galizi and A. Crisanti, Nature Communications, 12:3977. 2021.
CRISPR-based gene drives offer promising means to reduce the burden of pests and vector-borne diseases. These techniques consist of releasing genetically modified organisms carrying CRISPR-Cas nucleases designed to bias their inheritance and rapidly propagate desired ... |
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UC San Diego scientists develop the first CRISPR/Cas9-based gene drive in plantsM. Aguilera, UC San Diego News Center, 2021.
With a goal of breeding resilient crops that are better able to withstand drought and disease, University of California San Diego scientists have developed the first CRISPR-Cas9-based gene drive in plants. While gene drive technology has been developed in insects to help stop the ... |
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Using gene drives to control malariaA. Fell, Daily News, 2021.
A group of UC scientists led by Greg Lanzaro, professor of pathology, microbiology and immunology in the UC Davis School of Veterinary Medicine, recently completed an analysis of a strategy aimed at eliminating malaria from Africa using genetically engineered mosquitoes. ... |
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Selective inheritance of target genes from only one parent of sexually reproduced F1 progeny in ArabidopsisT. Zhang, M. Mudgett, R. Rambabu, B. Abramson, X. Dai, T. P. Michael and Y. Zhao, Nature Communications, 12:3854. 2021.
Sexual reproduction constrains progeny to inherit allelic genes from both parents. Selective acquisition of target genes from only one parent in the F1 generation of plants has many potential applications including the elimination of undesired alleles and acceleration of trait ... |
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Population modification strategies for malaria vector control are uniquely resilient to observed levels of gene drive resistance allelesG. C. Lanzaro, H. M. Sánchez C, T. C. Collier, J. M. Marshall and A. A. James, BioEssays, 2021.
Cas9/guide RNA (gRNA)-based gene drive systems are expected to play a transformative role in malaria elimination efforts., whether through population modification, in which the drive system contains parasite-refractory genes, or population suppression, in which the drive system ... |
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Temperature-Inducible Precision Guided Sterile Insect TechniqueN. P. Kandul, J. Liu and O. S. Akbari, bioRxiv, 2021.06.14.448312. 2021.
Releases of sterile males are the gold standard for many insect population control programs, and precise sex sorting to remove females prior to male releases is essential to the success of these operations. To advance traditional methods for scaling the generation of sterile ... |
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New CRISPR Tools Can Help Contain Mosquito Disease TransmissionAnonymous, labcompare, 2021.
Scientists have now developed several genetic editing tools that help pave the way to an eventual gene drive designed to stop Culex mosquitoes from spreading disease. As detailed in the journal Nature Communications, Xuechun Feng, Valentino Gantz and their colleagues at Harvard ... |
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Analysis of off-target effects in CRISPR-based gene drives in the human malaria mosquitoW. T. Garrood, N. Kranjc, K. Petri, D. Y. Kim, J. A. Guo, A. M. Hammond, I. Morianou, V. Pattanayak, J. K. Joung, A. Crisanti and A. Simoni, Proceedings of the National Academy of Sciences, 118:e2004838117. 2021.
CRISPR-Cas9 nuclease-based gene drives have been developed toward the aim of control of the human malaria vector Anopheles gambiae. Gene drives are based on an active source of Cas9 nuclease in the germline that promotes super-Mendelian inheritance of the transgene by ... |
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Researchers Create New CRISPR Tools to Help Contain Mosquito Disease TransmissionM. Aguilera, UC San Diego News Center, 2021.
Much less genetic engineering has been devoted to Culex genus mosquitoes, which spread devastating afflictions stemming from West Nile virus—the leading cause of mosquito-borne disease in the continental United States—as well as other viruses such as the Japanese encephalitis ... |
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New CRISPR tools help contain mosquito disease transmission: Genetics toolkit targets less researched Culex mosquitoes, which transmit West Nile virus and avian malaria.University of California - San Diego, ScienceDaily, 2021.
Since the onset of the CRISPR genetic editing revolution, scientists have been working to leverage the technology in the development of gene drives that target pathogen-spreading mosquitoes such as Anopheles and Aedes species, which spread malaria, dengue and other ... |
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Optimized CRISPR tools and site-directed transgenesis towards gene drive development in Culex quinquefasciatus mosquitoesX. Feng, V. López Del Amo, E. Mameli, M. Lee, A. L. Bishop, N. Perrimon and V. M. Gantz, Nature Communications, 12:2960. 2021.
Culex mosquitoes are a global vector for multiple human and animal diseases, including West Nile virus, lymphatic filariasis, and avian malaria, posing a constant threat to public health, livestock, companion animals, and endangered birds. While rising insecticide resistance has ... |
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Targeting conserved sequences circumvents the evolution of resistance in a viral gene drive against human cytomegalovirusM. Walter, R. Perrone and E. Verdin, Journal of virology, 2021.
Here, we analyze in cell culture experiments the evolution of resistance in a viral gene drive against human cytomegalovirus. We report that, after an initial invasion of the wildtype population, a drive-resistant population is positively selected over time and outcompetes gene ... |
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Genetic Technologies for Sustainable Management of Insect Pests and Disease VectorsS. Grilli, R. Galizi and C. Taxiarchi, Sustainability, 13. 2021.
Recent advancements in genetic and genome editing research, augmented by the discovery of new molecular tools such as CRISPR, have revolutionised the field of genetic engineering by enabling precise site-specific genome modifications with unprecedented ease. These technologies ... |
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Genetic Manipulation of Ticks: A Paradigm Shift in Tick and Tick-Borne Diseases ResearchA. Nuss, A. Sharma and M. Gulia-Nuss, Frontiers in Cellular and Infection Microbiology, 11:7. 2021.
Ticks are obligate hematophagous arthropods that are distributed worldwide and are one of the most important vectors of pathogens affecting humans and animals. Despite the growing burden of tick-borne diseases, research on ticks has lagged behind other arthropod vectors, such as ... |
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Systematic identification of plausible pathways to potential harm via problem formulation for investigational releases of a population suppression gene drive to control the human malaria vector Anopheles gambiae in West AfricaJ. B. Connolly, J. D. Mumford, S. Fuchs, G. Turner, C. Beech, A. R. North and A. Burt, Malaria Journal, 20:170. 2021.
Population suppression gene drive has been proposed as a strategy for malaria vector control. A CRISPR-Cas9-based transgene homing at the doublesex locus (dsxFCRISPRh) has recently been shown to increase rapidly in frequency in, and suppress, caged laboratory populations of the ... |
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Driving to Safety: CRISPR-Based Genetic Approaches to Reducing Antibiotic ResistanceE. Bier and V. Nizet, Trends in Genetics, 2021.
The complex and challenging problem of reducing antibiotic resistance (AR) requires a network of both societal and science-based solutions to preserve the most lifesaving pharmaceutical intervention known to medicine. In addition to developing new classes of antibiotics, it is ... |
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Ultra-conserved sequences in the genomes of highly diverse Anopheles mosquitoes, with implications for malaria vector controlS. M. O'Loughlin, A. J. Forster, S. Fuchs, T. Dottorini, T. Nolan, A. Crisanti and A. Burt, G3-Genes Genomes Genetics, 2021.
Here we search for conserved sequences of 18bp and over in an alignment of 21 Anopheles genomes, spanning an evolutionary timescale of 100 million years, and characterise the resulting sequences according to their location and function. Over 8000 ultra-conserved elements were ... |
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Meiotic Cas9 expression mediates genotype conversion in the male and female mouse germline.A. J. Weitzel, H. A. Grunwald, R. Levina, V. M. Gantz, S. M. Hedrick, E. Bier and K. L. Cooper, 2021.03.16.435716, 2021.
We previously showed that such a system of genotype conversion from heterozygous to homozygous after a sequence targeted CRISPR/Cas9 double strand DNA break is feasible in the female mouse germline. In the male germline, however, all double strand breaks were instead repaired by ... |
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Genetically Encoded CRISPR components Yield Efficient Gene Editing in the Invasive Pest, Drosophila suzukiiN. P. Kandul, E. J. Belikoff, J. Liu, A. Buchman, F. Li, A. Yamamoto, T. Yang, I. Shriner, M. J. Scott and O. Akbari, bioRxiv, 2021.03.15.435483. 2021.
Here we have developed transgenic strains that encode three different terminators and four different promoters to express Cas9 in both the soma and/or germline of SWD. The Cas9 lines were evaluated through genetic crossing to transgenic lines that encode single guide RNAs ... |
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Gene Drives Built to Follow More Stringent Rules of the RoadAnonymous, Genetic Engineering & Biotechnology News, 2021.
Gene drives, or systems that accelerate the spread of desirable genetic traits into a population, may be built to achieve specific levels of spread when released into the wild. By exerting control over the degree of spread, those who unleash gene drives may realize the benefits ... |
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New gene-drive technologies can help control crop pestsAnonymous, AZO Life Sciences, 2021.
The supposed gene drives, which exploit CRISPR technology to affect genetic inheritance, show the potential to quickly spread particular genetic traits across the populations of a specified species. For instance, gene-drive technologies used on insects are being developed to stop ... |
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New ‘Split-drive’ System Puts Scientists in the (Gene) Driver SeatM. Aguilera, UC San Diego News Center, 2021.
Gene-drive technologies applied in insects, for example, are being designed to halt the spread of devastating diseases such as malaria and dengue by preventing mosquito hosts from becoming infected. In agricultural fields, gene-drives are being developed to help control or ... |
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A confinable home and rescue gene drive for population modificationN. P. Kandul, J. Liu, J. B. Bennett, J. M. Marshall and O. S. Akbari, eLife, 10:e65939. 2021.
Homing based gene drives, engineered using CRISPR/Cas9, have been proposed to spread desirable genes throughout populations. However, invasion of such drives can be hindered by the accumulation of resistant alleles. To limit this obstacle, we engineer a confinable population ... |
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Developing GDi-CRISPR System for Multi-copy Integration in Saccharomyces cerevisiaeZ.-X. Zhang, Y.-Z. Wang, Y.-S. Xu, X.-M. Sun and H. Huang, Applied Biochemistry and Biotechnology, 2021.
This study aims to develop a low-cost and easy-to-use multi-copy integration tool in S. cerevisiae. Firstly, twenty-one Cas proteins from different microorganisms were tested in S. cerevisiae to find the functional Cas proteins with optimal cleavage ability. Results showed that ... |
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Designing gene drives to limit spillover to non-target populationsG. Greenbaum, M. W. Feldman, N. A. Rosenberg and J. Kim, PLOS Genetics, 17:e1009278. 2021.
We develop mathematical models of gene-drive dynamics that incorporate migration between a target and non-target populations to investigate the possibility of effectively applying a gene drive in the target population while limiting its spillovers to the non-target population ... |
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Split versions of Cleave and Rescue selfish genetic elements for measured self limiting gene driveG. Oberhofer, T. Ivy and B. A. Hay, PLoS genetics, 17:e1009385. 2021.
Self-sustaining Cleave and Rescue (ClvR) elements include a DNA sequence-modifying enzyme such as Cas9/gRNAs that disrupts endogenous versions of an essential gene, a tightly linked recoded version of the essential gene resistant to cleavage (the Rescue), and a Cargo. ClvR ... |
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Emergent challenges for CRISPR: biosafety, biosecurity, patenting, and regulatory issuesBraddick, D. , and Ramarohetra, R. F., Genome Engineering Via Crispr-Cas9 System, 2021.
The recent advancements of CRISPR-Cas technologies have transformed this simple and efficient gene editing technique into an extraordinarily powerful tool. The most anticipated applications could create novel therapeutics against mankind's most serious afflictions and help ... |
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Optimized CRISPR tools and site-directed transgenesis in Culex quinquefasciatus mosquitoes for gene drive developmentX. Feng, V. Lopez Del Amo, E. Mameli, M. Lee, A. L. Bishop, N. Perrimon and V. M. Gantz, bioRxiv, 2021.02.10.430702. 2021.
Here, we developed a Culex-specific Cas9/gRNA expression toolkit and used site-directed homology-based transgenesis to generate and validate a Culex quinquefasciatus Cas9-expressing line. We showed that gRNA scaffold variants improve transgenesis efficiency in both Culex and ... |
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A Code of Ethics for Gene Drive ResearchG. J. Annas, C. L. Beisel, K. Clement, A. Crisanti, S. Francis, M. Galardini, R. Galizi, J. Grünewald, G. Immobile, A. S. Khalil, R. Müller, V. Pattanayak, K. Petri, L. Paul, L. Pinello, A. Simoni, C. Taxiarchi and J. K. Joung, The CRISPR Journal, 2021.
A code of ethics can be a useful tool for all parties involved in the development and regulation of gene drives and can be used to help ensure that a balanced analysis of risks, benefits, and values is taken into consideration for the interest of society and humanity. We have ... |
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Assisting Evolution: How Far Should We Go to Help Species Adapt?E. Kolbert, YaleEnvironment360, 2021.
It was a hot, intensely blue day in the Australian Outback, about 350 miles north of Adelaide. I was tagging along with Moseby as she checked the batteries on the motion-sensitive cameras that dot Arid Recovery, an ecosystem restoration project she and her husband launched in ... |
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Should we dim the sun? Will we even have a choiceE. Klein, New York Times, 2021.
“Under a White Sky” is going to be on my best books of 2021 list. It’s a wonderful work. Kolbert is the Pulitzer Prize-winning author of “The Sixth Extinction,” which you may have read. She is a staff writer at The New Yorker and just one of the great science ... |
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In Our Image: The Ethics of CRISPR Genome EditingJ. C. Eissenberg, Biomolecular Concepts, 12:1-7. 2021.
Here, I discuss the ethics surrounding the transformative CRISPR/Cas9mediated genome editing technology in the contexts of human genome editing to eradicate genetic disease and of gene drive technology to eradicate animal vectors of human disease. |
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CRISPR and the splice to survive: New gene-editing technology could be used to save species from extinction—or to eliminate them.E. Kolbert, New Yorker, 2021.
About a year ago, not long before the pandemic began, I paid a visit to the center, which is an hour southwest of Melbourne. The draw was an experiment on a species of giant toad known familiarly as the cane toad. The toad was introduced to Australia as an agent of pest control, ... |
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Control of malaria-transmitting mosquitoes using gene drivesT. Nolan, Philosophical Transactions of the Royal Society B: Biological Sciences, 376:20190803. 2020.
In this article, I will discuss the relative merits of this type of gene drive, as well as barriers to its technical development and to its deployment in the field as malaria control. This article is part of the theme issue ‘Novel control strategies for mosquito-borne ... |
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Vector dynamics influence spatially imperfect genetic interventions against diseaseM. K. Yuksel, C. H. Remien, B. Karki, J. J. Bull and S. M. Krone, Evolution, Medicine, and Public Health, 9:1-10. 2020.
In spatially structured populations, imperfect coverage of the vector will leave pockets in which the parasite may persist. Movement by humans may disrupt this local persistence and facilitate eradication when these pockets are small, spreading parasite reproduction outside ... |
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New insect species made via genetic engineeringL. Leffer, SCIENCELINE, 2020.
A biotech fast-forward button for evolution is on the horizon. Researchers say they have used a novel genetic engineering method to create several new species of fruit fly in the lab for the first time — an achievement which might help put a future without malaria and other ... |
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A CRISPR endonuclease gene drive reveals two distinct mechanisms of inheritance biasS. A. N. Verkuijl, E. González, J. X. D. Ang, M. Li, N. P. Kandul, M. Anderson, O. S. Akbari, M. Bonsall and L. Alphey, bioRxiv, 2020.12.15.421271. 2020.
In this study, we report the functioning of sds3, bgcn, and nup50 expressed Cas9 in an Aedes aegypti homing split drive system targeting the white gene. We report their inheritance biasing capability, propensity for maternal deposition, and zygotic/somatic expression. ... |
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Mosquito population modification: the drive to malaria eradicationA. A. James, BugBitten BMC, 2020.
We have had considerable success in the past demonstrating that we can use modern molecular biological and insect transgenesis tools to make genes that prevent mosquitoes from passing on parasites (see 1 and 2). We have focused most recently on laboratory experiments to find ways ... |
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Gene drive blocks malaria transmission in mosquitoeslabonline, labonline, 2020.
Employing a strategy known as ‘population modification’, which involves using a CRISPR-Cas9 gene drive system to introduce genes preventing parasite transmission into mosquito chromosomes, University of California (UC) researchers have made a major advance in the use of ... |
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Evading evolution of resistance to gene drivesR. Gomulkiewicz, M. L. Thies and J. J. Bull, bioRxiv, 2020.08.27.270611. 2020.
Our analyses suggest that among gene drives that cause moderate suppression, toxin-antidote systems are less apt to select for resistance than homing drives. Single drives of this type would achieve only partial population suppression, but multiple drives (perhaps delivered ... |
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A gene-drive rescue system for the modification of malaria mosquito populationsA. Adolfi, Nature Research Bioengineering Community, 2020.
Mosquito populations can now be reliably modified using 1) antimalarial molecules that block parasite development and 2) a CRISPR-based gene drive system that mediates their rapid spreading across the vector population. |
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UC researchers pioneer more effective method of blocking malaria transmission in mosquitoesUCI, UCI News, 2020.
University of California, Irvine postdoctoral researcher Adriana Adolfi, in collaboration with colleagues at UCI, UC Berkeley and UC San Diego, followed up on the group’s pioneering effort to develop CRISPR-based gene drive systems for making mosquito vectors resistant to ... |
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Efficient population modification gene-drive rescue system in the malaria mosquito Anopheles stephensiA. Adolfi, V. M. Gantz, N. Jasinskiene, H.-F. Lee, K. Hwang, G. Terradas, E. A. Bulger, A. Ramaiah, J. B. Bennett, J. J. Emerson, J. M. Marshall, E. Bier and A. A. James, Nature Communications, 11:5553. 2020.
Here, we develop a recoded gene-drive rescue system for population modification of the malaria vector, Anopheles stephensi, that relieves the load in females caused by integration of the drive into the kynurenine hydroxylase gene by rescuing its function. Non-functional resistant ... |
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Gene Drive: The What, How, Why, and Whether We ShouldN. Pazhayam, The Pipettepen, 2020.
Under regular Mendelian inheritance, the probability of inheriting a particular allele from a heterozygous parent is 50% – this is because offspring can only inherit one or the other chromosome from each parent. However, gene drive is a technology that changes this probability ... |
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WHO Refers to GM Mosquitoes as Beneficial TechnologyISAAA, Crop Biotech Update, 2020.
The World Health Organization (WHO) released its official statement to clarify its stance on the evaluation and use of genetically modified (GM) mosquitoes and its use to control vector-borne diseases (VBD). WHO says it supports the investigation of all potentially beneficial ... |
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Position of ARRIGE Scientific Committee on Gene DriveARRIGE Scientific Committee on Gene Drive, ARRIGE Newsletter, 2020.
We are facing a change of paradigm that must lead us to be responsible for altered inheritance and the hybridization between artefacts, considered as natural or artificial, at the very moment when this division itself is blurred by the engineering capacity to act on mutations, ... |
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Progress Toward Zygotic and Germline Gene Drives in MiceC. Pfitzner, M. A. White, S. G. Piltz, M. Scherer, F. Adikusuma, J. N. Hughes and P. Q. Thomas, The CRISPR Journal, 3:388-397. 2020.
Here, we investigated the efficiency of CRISPR-Cas9-based gene drives in Mus musculus by constructing "split drive" systems where gRNA expression occurs on a separate chromosome to Cas9, which is under the control of either a zygotic (CAG) or germline (Vasa) promoter. |
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Engineered Gene Drives: State of Research Webinar Series by The GeneConvene Global Collaborative September-October 2020David O'Brochta and Hector Quemada, GeneConvene Global Collaborative, 2020.
A series of technical webinars on engineered gene drive technology research and development given by leading researchers in the field. |
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Inherently confinable split-drive systems in DrosophilaG. Terradas, A. B. Buchman, J. B. Bennett, I. Shriner, J. M. Marshall, O. S. Akbari and E. Bier, bioRxiv, 2020.09.03.282079. 2020.
Here, we test split gene-drive (sGD) systems in Drosophila melanogaster that were inserted into essential genes required for viability (rab5, rab11, prosalpha2) or fertility (spo11). I |
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Chromosome drives via CRISPR-Cas9 in yeastH. Xu, M. Han, S. Zhou, B.-Z. Li, Y. Wu and Y.-J. Yuan, Nature Communications, 11:4344. 2020.
Our results show that the entire Saccharomyces cerevisiae chromosome can be eliminated efficiently through only one double-strand break around the centromere via CRISPR-Cas9. As a proof-of-concept experiment of this CRISPR-Cas9 chromosome drive system, the synthetic yeast ... |
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Evading evolution of resistance to gene drivesR. Gomulkiewicz, M. L. Thies and J. J. Bull, bioRxiv, 2020.
Here we develop mathematical and computational models to identify conditions under which suppression drives will evade resistance, even if resistance is present initially. |
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Next-generation gene drive for population modification of the malaria vector mosquito, Anopheles gambiaeR. Carballar-Lejarazú, C. Ogaugwu, T. Tushar, A. Kelsey, T. B. Pham, J. Murphy, H. Schmidt, Y. Lee, G. C. Lanzaro and A. A. James, Proceedings of the National Academy of Sciences, 202010214. 2020.
We show here that the Cas9/guide RNA-based gene-drive components of a genetically-engineered malaria mosquito vector, Anopheles gambiae, achieve key target product profile requirements for efficacy and performance. |
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A home and rescue gene drive forces its inheritance stably persisting in populationsN. P. Kandul, J. Liu, J. B. Bennett, J. M. Marshall and O. Akbari, bioRxiv, 2020.08.21.261610. 2020.
We demonstrate that HomeR can achieve nearly ~100% transmission enabling it to persist at genotypic fixation in several multi-generational population cage experiments, underscoring its long term stability. |
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Towards Responsive Eco-technology: The Development of a Male Sex-biased MouseW. Kamau, Massachusetts Institute of Technology, 2020.
CRISPR-Cas systems have catalyzed the emergence of several synthetic population management strategies, like gene drives, for controlling pests and disease vectors. As these technologies garner greater visibility in both general and regulatory audiences, questions have arisen ... |
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Modelling the suppression of a malaria vector using a CRISPR-Cas9 gene drive to reduce female fertilityA. R. North, A. Burt and H. C. J. Godfray, BMC Biology, 18:98. 2020.
Gene drives based on CRISPR-Cas9 technology are increasingly being considered as tools for reducing the capacity of mosquito populations to transmit malaria, and one of the most promising options is driving endonuclease genes that reduce the fertility of female mosquitoes. Here, ... |
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Meet Cosmo, the gene-edited Crispr calfS. D. McClain, Capital Press, 2020.
Cosmo was the grand finale of a series of experiments to create a line of genome-edited cattle tailored for the beef industry. He was designed to produce 75% male offspring. |
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Can a population targeted by a CRISPR-based homing gene drive be rescued?N. O. Rode, V. Courtier-Orgogozo and F. Débarre, G3-Genes Genomes Genetics, 2020.
N. O. Rode, V. Courtier-Orgogozo and F. Débarre (2020). G3 doi: 10.1534/g3.120.401484 Developing countermeasures is important to control the spread of gene drives, should they result in unanticipated damages. One proposed countermeasure is the introduction of individuals ... |
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The future of beef might be a sausage festN. Johnson, grist, 2020.
N. Johnson. (2020) grist. A media report on the creation of a cow with a sex ratio altering genetic change expected to lead to 3/4 of the cow's offspring being males. This type of sex ratio distortion results in gene drive and is also being considered to help control populations ... |
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Meet Cosmo the Frankenbull: Scientists genetically engineer a bull calf so that 75 per cent of its offspring will be maleJ. Pinkstone, Daily Mail, 2020.
J. Pinkstone (2020). Daily Mail. A media report on the creation of a cow with a sex ratio altering genetic change expected to lead to 3/4 of the cow's offspring being males. This type of sex ratio distortion results in gene drive and is also being considered to help control ... |
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Meet the first genetically modified bull. Why did scientists change itJ. Kessler, Free News, 2020.
J. Kessler (2020). Free News. UC Davis scientists have successfully introduced a bovine embryo, or the bovine SRY gene, which is responsible for the development of the male. This is the first demonstration of targeted gene insertion for large DNA sequences through embryo-mediated ... |
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Small-Molecule Control of Super-Mendelian Inheritance in Gene DrivesV. López Del Amo, B. S. Leger, K. J. Cox, S. Gill, A. L. Bishop, G. D. Scanlon, J. A. Walker, V. M. Gantz and A. Choudhary, Cell Reports, 31:107841. 2020.
Summary Synthetic CRISPR-based gene-drive systems have tremendous potential in public health and agriculture, such as for fighting vector-borne diseases or suppressing crop pest populations. These elements can rapidly spread in a population by breaching the inheritance limit of ... |
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Development of zygotic and germline gene drives in miceC. Pfitzner, J. N. Hughes, M. A. White, M. Scherer, S. G. Piltz and P. Q. Thomas, bioRxiv, 2020.
Here we investigated the efficiency of CRISPR/Cas9-based gene drives in Mus musculus by constructing "split drive" systems with Cas9 under the control of zygotic (CAG) or germline (Vasa) promoters. |
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Simulation models from: Can CRISPER-mediated gene drive work in pest and beneficial haplodiploid species?J. Li and B. Tabashnik, Dryad, 2020.
Gene drives based on CRISPR/Cas9 have the potential to reduce the enormous harm inflicted by crop pests and insect vectors of human disease, as well as to bolster valued species. In contrast with extensive empirical and theoretical studies in diploid organisms, little is known ... |
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Le forçage génétique (gène drive) et ses applicationsV. Courtier-Orgogozo, Bulletin de l'Académie Vétérinaire de France, 172:94-98. 2020.
Gene drive is a new genetic engineering technology that has been developed over the past five years and that allows genetic modifications to spread rapidly in natural populations. Potential applications are numerous, for public health issues, agriculture and conservation biology. ... |
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Malaria mosquitoes eliminated in lab by creating all male populationsH. Dunning, Imperial College London, 2020.
A team led by Imperial College London spread a genetic modification that distorts the sex ratio through a population of caged Anopheles gambiae mosquitoes using ‘gene drive’ technology. |
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Gene drive outcomes not determined by genetic variation – A PodcastThomas Locke, Malaria Minute, 2020.
Gene drives are a system of genetic modification that use ‘molecular scissors’ to edit DNA sequences that self-perpetuate to ensure the rapid spread of mutation in a population. They offer new avenues for eradicating vector-borne diseases like malaria. They rely on the Cas9 ... |
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Super-Mendelian inheritance mediated by CRISPR-Cas9 in the female mouse germlineH. A. Grunwald, V. M. Gantz, G. Poplawski, X.-r. S. Xu, E. Bier and K. L. Cooper, TAGC 2020, 2020.
A gene drive biases the transmission of one of the two copies of a gene such that it is inherited more frequently than by random segregation. Highly efficient gene drive systems that have recently been developed in insects, which leverage the sequence-targeted DNA cleavage ... |
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Gene drive and resilience through renewal with next generation Cleave and Rescue selfish genetic elementsG. Oberhofer, T. Ivy and B. A. Hay, Proceedings of the National Academy of Sciences, 117:9013-9021. 2020.
Gene drive can spread beneficial traits through populations, but will never be a one-shot project in which one genetic element provides all desired modifications, for an indefinitely long time. Here, we show that gene drive-mediated population modification in Drosophila can be ... |
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Can a population targeted by a CRISPR-based homing gene drive be rescued?N. O. Rode, V. Courtier-Orgogozo and F. Débarre, bioRxiv, 2020.03.17.995829. 2020.
CRISPR-based homing gene drive is a genetic control technique aiming to modify or eradicate natural populations through the release of individuals carrying an engineered piece of DNA that can be inherited by all their progeny. Developing countermeasures is important to control ... |
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Anti-CRISPR protein applications: natural brakes for CRISPR-Cas technologiesMarino, N. D., Pinilla-Redondo, R. , Csorgo, B., Bondy-Denomy, J., Nature Methods, 2020.
Clustered, regularly interspaced short palindromic repeats (CRISPR) and CRISPR-associated (Cas) genes, a diverse family of prokaryotic adaptive immune systems, have emerged as a biotechnological tool and therapeutic. The discovery of protein inhibitors of CRISPR-Cas systems, ... |
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Population-level multiplexing: A promising strategy to manage the evolution of resistance against gene drives targeting a neutral locusM. P. Edgington, T. Harvey-Samuel and L. Alphey, Evolutionary Applications, 10. 2020.
CRISPR-based gene drives bias inheritance in their favour by inducing double-stranded breaks (DSBs) at wild-type homologous loci and using the drive transgene as a repair template-converting drive heterozygotes into homozygotes. Recent studies have shown that alternate ... |
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The kill-switch for CRISPR that could make gene-editing saferE. Dolgin, Nature, 577:308-310. 2020.
How anti-CRISPR proteins and other molecules could bolster biosecurity and improve medical treatments. |
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These are the 5 most dystopian technologies of 2020 and beyondM. Sullivan, FastCompany, 2019.
Tech is always both good and bad. But we live in a time when everything gets weaponized—ideas, images, ancient texts, biases, and even people. And technology provides the tools to do it easier, faster, and with less resources. |
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What is genome editing?NHGRI, NHGRI, 2019.
Genome editing is a method that lets scientists change the DNA of many organisms, including plants, bacteria, and animals. Editing DNA can lead to changes in physical traits, like eye color, and disease risk. Scientists use different technologies to do this. |
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CRISPR ExplainedMayo Clinic, Mayo Clinic, 2018.
A short video that simply explains what CRISPR is and how it is used for gene editing. Simple language and highly accessible. |
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Genome editing: scientific opportunities, public interests and policy options in the European UnionEASAC, European Academies Science Advisory Council, 2017.
In many of the areas in which EASAC, the European Academies’ Science Advisory Council, works, where a large and solid body of knowledge is needed to inform the action of our societies, it is important to recognise that there is an intimate mix of science and values involved in ... |
