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Related Concept Videos

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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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Author Spotlight: Development of Simplified CRISPR-Based Tests for Rapid Detection of Infectious Diseases
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Creating CRISPR-responsive smart materials for diagnostics and programmable cargo release.

Raphael V Gayet1,2,3, Helena de Puig2,4, Max A English1,2

  • 1Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.

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|August 19, 2020
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Summary
This summary is machine-generated.

Researchers created CRISPR-responsive hydrogels using Cas12a nuclease for sensitive DNA detection. These nucleic acid-responsive materials enable rapid cargo release for diagnostics and drug delivery applications.

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Area of Science:

  • Biomaterials Science
  • Molecular Biology
  • Synthetic Biology

Background:

  • Nucleic acids are vital biological signals for diagnostics and drug delivery.
  • Existing DNA-responsive materials lack sensitivity and require extensive repurposing.
  • CRISPR-associated nuclease Cas12a offers a programmable platform for sensing and actuating materials.

Purpose of the Study:

  • To provide a comprehensive guide for designing, synthesizing, and actuating CRISPR-responsive hydrogels.
  • To demonstrate the use of Cas12a for sensitive and rapid DNA detection and material response.
  • To enable repurposing of nucleic acid-responsive materials for diverse applications.

Main Methods:

  • Guidelines for synthesizing Cas12a guide RNAs (gRNAs) for in vitro use.
  • Methods for synthesizing polyethylene glycol-DNA (PEG-DNA) and polyacrylamide-DNA (PA-DNA) hydrogels.
  • Controlled hydrogel degradation using Cas12a for cargo release (small molecules, enzymes, nanoparticles, cells).
  • Design and assembly of microfluidic paper-based devices for diagnostic readouts.

Main Results:

  • Demonstrated sensitive and rapid DNA detection using Cas12a-responsive hydrogels.
  • Successfully released various cargos including small molecules, enzymes, nanoparticles, and living cells within hours.
  • Developed paper-based diagnostic devices converting DNA inputs into visual and electronic signals.
  • Achieved efficient hydrogel synthesis and cargo release within 3-4 days.

Conclusions:

  • CRISPR-responsive hydrogels offer a versatile platform for nucleic acid sensing and actuation.
  • The developed system provides enhanced sensitivity and rapid repurposing capabilities for DNA-responsive materials.
  • This approach facilitates advanced applications in drug delivery, medical devices, and diagnostics.