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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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CRISPR and crRNAs02:53

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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.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
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CRISPR01:59

CRISPR

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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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Related Experiment Video

Updated: Jan 12, 2026

Embryo Microinjection and Knockout Mutant Identification of CRISPR/Cas9 Genome-Edited Helicoverpa Armigera Hübner
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Embryo Microinjection and Knockout Mutant Identification of CRISPR/Cas9 Genome-Edited Helicoverpa Armigera Hübner

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A temperature-sensitive CRISPR-Cas12a system for sterile insect technique.

Christina Nguyen1, Ahmed Idowu Omotayo1, Sara Sanz Juste2,3

  • 1University of Texas Health Science Center, School of Public Health, Department of Epidemiology, Human Genetics, and Environmental Sciences, Center for Infectious Diseases, Houston, TX, 77030, USA.

Nature Communications
|November 3, 2025
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Summary

A new Cas12a-based sterile insect technique (SIT) uses a single strain for temperature-controlled male sterility. This approach simplifies vector control, offering a scalable alternative for disease management.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Entomology

Background:

  • The sterile insect technique (SIT) is a method for insect population control.
  • CRISPR/Cas9-based precision-guided SIT (pgSIT) offers targeted genetic control but requires maintaining two separate transgenic lines.
  • Challenges in scaling pgSIT include line maintenance and sex sorting.

Purpose of the Study:

  • To develop a more scalable and efficient pgSIT system.
  • To overcome the limitations of maintaining separate transgenic lines in current pgSIT methods.
  • To create a temperature-inducible system for generating sterile males.

Main Methods:

  • Development of a single transgenic strain expressing both Cas12a nuclease and guide RNAs (gRNAs).
  • Targeting of gRNAs to induce male sterility and female lethality.
  • Utilizing the temperature-dependent activity of Cas12a for system activation.

Main Results:

  • A single Cas12a-based strain was successfully developed for pgSIT.
  • The system effectively induces male sterility and female lethality upon temperature increase.
  • The single-strain system simplifies maintenance and eliminates the need for sex sorting.

Conclusions:

  • The Cas12a-based pgSIT system offers a simplified and potentially more scalable approach to insect population control.
  • This temperature-inducible system facilitates easier maintenance and application for vector control.
  • The technology holds promise for combating vector-borne diseases through improved pest management strategies.