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RNA Control via Redox-Responsive Acylation.

Junsong Guo1, Siqin Chen1, Yoshiyuki Onishi2

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|March 14, 2024
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Summary
This summary is machine-generated.

Researchers developed a new method to control RNA using redox-responsive chemistry. This "cloaking" and "uncloaking" strategy allows for precise RNA activation within cells, avoiding lysosomal pathways.

Keywords:
CloakingDisulfidePost-synthetic acylationRNAReducing environment

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Area of Science:

  • RNA therapeutics
  • Chemical biology
  • Bioconjugation chemistry

Background:

  • Stimuli-responsive RNA constructs offer spatiotemporal control over RNA function.
  • Redox-responsive systems for caged RNA activation are underexplored.
  • Precise control over RNA localization and activity in biological systems is challenging.

Purpose of the Study:

  • To develop a novel strategy for controlling RNA activity using redox-responsive chemistry.
  • To enable precise spatiotemporal activation of RNA constructs within cellular environments.
  • To create a versatile platform for RNA-based applications with enhanced cellular delivery.

Main Methods:

  • Post-synthetic acylation of RNA's 2'-OH groups with disulfide-containing acyl adducts ('cloaking').
  • Design and synthesis of specific acylating reagents for RNA modification.
  • Demonstration of traceless release ('uncloaking') and reactivation of RNA using reducing stimuli.

Main Results:

  • Acyl moieties effectively block RNA catalytic activity and folding.
  • Redox stimuli trigger traceless release and reactivation of caged RNAs.
  • Modified RNA shows rapid cellular uptake, cytosolic distribution, and activation without lysosomal entrapment.

Conclusions:

  • The developed acylation strategy provides effective redox-responsive control over RNA.
  • This method facilitates efficient cellular delivery and activation of RNA in the cytosol.
  • The platform offers a promising, accessible tool for RNA biology and therapeutic applications.