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Split RNA switch orchestrates pre- and post-translational control to enable cell type-specific gene expression

Author

Listed:
  • Itsuki Abe

    (Sakyo-ku
    Sakyo-ku
    The University of Tokyo
    The University of Tokyo)

  • Hirohisa Ohno

    (Sakyo-ku)

  • Megumi Mochizuki

    (Sakyo-ku)

  • Karin Hayashi

    (Sakyo-ku)

  • Hirohide Saito

    (Sakyo-ku
    The University of Tokyo)

Abstract

RNA switch is a synthetic RNA-based technology that controls gene expression in response to cellular RNAs and proteins, thus enabling cell type-specific gene regulation and holding promise for gene therapy, regenerative medicine, and cell therapy. However, individual RNA switches often lack the specificity required for practical applications due to low ON/OFF ratios and difficulty in finding distinct and single biomolecule targets. To address these issues, we present “split RNA switches” that integrate outputs from multiple RNA switches by exploiting protein splicing. We show that split RNA switches significantly improve the ON/OFF ratio of microRNA-responsive ON switch system by canceling leaky OFF level in human cells. Using this approach, we achieve efficient cell purification using drug-resistance genes based on endogenous microRNA profiles and CRISPR-mediated genome editing with minimal off-target-cell effects. Additionally, we demonstrate RNA-based synthetic circuits using split RNA switches to enable the detection of multiple microRNAs and proteins with logical operations. Split RNA switches highlight the potential of post-translational processing as a versatile and comprehensive strategy for advancing mRNA-based therapeutic technologies.

Suggested Citation

  • Itsuki Abe & Hirohisa Ohno & Megumi Mochizuki & Karin Hayashi & Hirohide Saito, 2025. "Split RNA switch orchestrates pre- and post-translational control to enable cell type-specific gene expression," Nature Communications, Nature, vol. 16(1), pages 1-18, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-60392-2
    DOI: 10.1038/s41467-025-60392-2
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    References listed on IDEAS

    as
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