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Related Concept Videos

CRISPR/Cas9 Genome Editing01:28

CRISPR/Cas9 Genome Editing

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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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CRISPR01:59

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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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New CRISPR array designs enable multiplex base-editing (MBE) and multiplex prime-editing (MPE) for simultaneous genomic locus editing. This advance enhances applications in complex genomics and polygenic disease research.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • Current base- and prime-editing technologies have limitations in simultaneously editing multiple genomic sites.
  • This inefficiency restricts their use in complex genomic studies and polygenic disease research.

Purpose of the Study:

  • To develop efficient strategies for multiplex base-editing (MBE) and multiplex prime-editing (MPE) in human cells.
  • To enable simultaneous editing of multiple genomic loci using novel CRISPR array architectures.

Main Methods:

  • Development of drive-and-process (DAP) CRISPR array architectures.
  • Utilizing tRNA as an RNA polymerase III promoter to drive tandemly assembled tRNA-guide RNA (gRNA) arrays.
  • Engineering a 75-nt human cysteine tRNA (hCtRNA) for DAP array functionality.

Main Results:

  • Achieved up to 31-loci MBE and up to 3-loci MPE using the engineered DAP arrays.
  • Demonstrated simultaneous editing of multiple disease-relevant genomic loci via AAV and lentivirus delivery.
  • Streamlined gRNA expression and processing on a single array.

Conclusions:

  • Established efficient MBE and MPE strategies for multiplex genomic editing.
  • The DAP CRISPR array architecture offers a streamlined approach for simultaneous multi-locus editing.
  • This technology holds significant potential for biomedical research and therapeutic applications.