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Related Concept Videos

RNA Interference01:23

RNA Interference

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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
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Handcuffed antisense oligonucleotides for light-controlled cell-free expression.

Denis Hartmann1, Michael J Booth1,2

  • 1Department of Chemistry, University of Oxford, Mansfield Road, OX1 3TA, Oxford, UK.

Chemical Communications (Cambridge, England)
|April 19, 2023
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Summary
This summary is machine-generated.

Researchers developed a novel photocaging method to control antisense oligonucleotides (ASOs). By

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Oligonucleotide Therapeutics

Background:

  • Antisense oligonucleotides (ASOs) are crucial for gene silencing.
  • Precise control over ASO activity is essential for therapeutic applications.
  • Current methods for regulating ASO activity can be complex.

Purpose of the Study:

  • To develop a simple and effective photocaging strategy for antisense oligonucleotides (ASOs).
  • To enable precise, light-inducible control over gene silencing mediated by ASOs.
  • To create a versatile platform for regulating biological processes using photocaged ASOs.

Main Methods:

  • Developed a photocaging strategy by 'handcuffing' two ASOs to a protein scaffold.
  • Utilized terminally photocleavable biotin-modified ASOs for divalent binding to streptavidin.
  • Assessed gene knockdown activity in cell-free protein synthesis systems.
  • Investigated the recovery of ASO activity upon light-induced unlocking.

Main Results:

  • The 'handcuffed' ASOs demonstrated significantly reduced gene knockdown activity.
  • Photocleavage of the biotin modifications by illumination restored full ASO activity.
  • The photocaging strategy effectively silenced ASO function until triggered.

Conclusions:

  • This photocaging method provides a simple and precise way to regulate ASO activity.
  • Light-inducible control of ASOs opens new avenues for precise biological system regulation.
  • The developed strategy is promising for developing controllable oligonucleotide-based therapeutics.