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CRISPR/Cas9 Genome Editing01:28

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The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...
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Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
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Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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Silencing the Spark: CRISPR/Cas9 Genome Editing in Weakly Electric Fish
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Redefining mouse transgenesis with CRISPR/Cas9 genome editing technology.

Gaetan Burgio1

  • 1Department of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia. Gaetan.burgio@anu.edu.au.

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Summary

Generating genetically modified mouse alleles is now faster and more efficient. A new study demonstrates CRISPR/Cas9 gene editing in pregnant mice for rapid allele creation.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Developmental Biology

Background:

  • Conventional transgenesis for generating genetically modified mouse alleles is a lengthy and inefficient procedure.
  • Developing new methods for precise genetic modification in vivo is crucial for research.

Purpose of the Study:

  • To evaluate the efficiency of in situ CRISPR/Cas9 delivery for generating genetically modified alleles in mice.
  • To establish a rapid method for creating both simple and complex alleles in vivo.

Main Methods:

  • In situ delivery of CRISPR/Cas9 gene editing reagents into pregnant mice.
  • Utilizing CRISPR/Cas9 technology for targeted genetic modification of mouse embryos.

Main Results:

  • High efficiency of gene editing was achieved through in situ delivery of CRISPR/Cas9.
  • The method enabled the rapid generation of genetically modified mouse alleles.
  • Both simple and complex allele types were successfully created.

Conclusions:

  • In situ CRISPR/Cas9 delivery offers a highly efficient and rapid approach for generating genetically modified mouse alleles.
  • This technique significantly improves upon conventional transgenesis methods for allele creation.