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Evaluating Riboglow-FLIM probes for RNA sensing.

Nadia Sarfraz1, Luke K Shafik1, Zachary R Stickelman1

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|February 9, 2024
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Summary
This summary is machine-generated.

Riboglow-FLIM enables live-cell RNA tracking by measuring fluorescence lifetime. Probe selection and cell type significantly impact RNA detection, guiding future tool development.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biophysics

Background:

  • Riboglow-FLIM is a novel technique for genetically tagging and tracking RNA molecules in live cells.
  • It relies on measuring the fluorescence lifetime of a small molecule probe that binds to an RNA tag.
  • This method offers potential for advanced RNA dynamics studies.

Purpose of the Study:

  • To systematically and quantitatively evaluate key elements of the Riboglow-FLIM technique.
  • To assess the impact of probe design (linkers, fluorophores) and cellular environment on fluorescence lifetime measurements.
  • To establish a foundation for Riboglow-FLIM applications and further tool development.

Main Methods:

  • In vitro measurements of fluorescence lifetime for various Riboglow-FLIM probe variants.
  • Fluorescence Lifetime Imaging Microscopy (FLIM) in diverse mammalian cell types.
  • Metabolomic analysis to evaluate potential effects on cell physiology.

Main Results:

  • Distinct fluorescence lifetime differences were observed among probe variants due to linker and fluorophore variations.
  • Lifetime variations were dependent on both the specific probe and the cell type.
  • No overall changes in cell health were detected despite observed lifetime differences between cell lines.

Conclusions:

  • Probe selection and cellular environment are critical factors for successful RNA detection using Riboglow-FLIM.
  • The study provides foundational insights for optimizing Riboglow-FLIM for diverse biological systems.
  • This work supports the future development and application of Riboglow-FLIM in various research fields.