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siRNA - Small Interfering RNAs02:30

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Porous Silicon Microparticles for Delivery of siRNA Therapeutics
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Molecular Engineering of Functional SiRNA Agents.

Neelu Batra1, Mei-Juan Tu1, Ai-Ming Yu1

  • 1Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, California 95817, United States.

ACS Synthetic Biology
|May 11, 2024
PubMed
Summary

Researchers developed a synthetic biology platform for high-yield bacterial production of functional small interfering RNA (siRNA) agents. This bioengineering approach enables efficient production of therapeutic RNA molecules for research and drug development.

Keywords:
RNA engineeringRNA interferencesmall interfering RNAtherapy

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Area of Science:

  • Synthetic biology
  • Bioengineering
  • Molecular biology

Background:

  • Synthetic biology enables organism redesign for novel functions and products.
  • Biological small interfering RNA (siRNA) has therapeutic potential but requires efficient production methods.

Purpose of the Study:

  • To develop an innovative bioengineering platform for high-yield, large-scale production of BioRNA/siRNA agents.
  • To demonstrate the efficacy and biological activity of BioRNA/siRNA agents produced via bacterial fermentation.

Main Methods:

  • Utilized a novel tRNA fused pre-miRNA carrier for BioRNA/siRNA production in host cells.
  • Employed bacterial fermentation for large-scale synthesis of BioRNA/siRNA agents.
  • Assessed purity, endotoxin levels, and biological activity of produced BioRNA/siRNA molecules.

Main Results:

  • Achieved high-level overexpression of nine target BioRNA/siRNA molecules with 100% success.
  • Obtained 3-10 mg of high-purity (>98%) BioRNA/siRNA per 0.25 L of bacterial culture with low endotoxin levels (<5 EU/microg RNA).
  • Demonstrated biological activity of three representative BioRNA/siRNAs (targeting GFP, BCL2, PD-L1), showing specific target silencing and antiproliferation effects for PD-L1-siRNA.

Conclusions:

  • The developed platform offers a novel method for bioengineering functional siRNA agents through bacterial fermentation.
  • This approach advances synthetic biology by providing a scalable and efficient system for producing RNA therapeutics.
  • The produced BioRNA/siRNA agents show promise for research applications and drug development, particularly in cancer therapy.