What question did this study set out to answer?

To establish o-BMVC fluorescence lifetime imaging microscopy as an intracellular method for detecting direct ligand binding to G-quadruplex DNA structures and assessing cellular DNA integrity.

December 21, 2018MoleculesOpen Access

Binding of Small Molecules to G-quadruplex DNA in Cells Revealed by Fluorescence Lifetime Imaging Microscopy of o-BMVC Foci

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To establish o-BMVC fluorescence lifetime imaging microscopy as an intracellular method for detecting direct ligand binding to G-quadruplex DNA structures and assessing cellular DNA integrity.
Utilized time-gated fluorescence lifetime imaging microscopy (FLIM) with the fluorescent probe o-BMVC to visualize and quantify G-quadruplex (G4) foci in cancer and normal cells.
Treated cells with known G4-binding ligands (TMPyP4, BRACO-19, BMVC4, PDS) and the minor-groove binder Hoechst 33258 to analyze changes in o-BMVC foci numbers before and after ligand washout.
Pretreatment of cancer cells with TMPyP4, BRACO-19, or BMVC4 markedly reduced the number of o-BMVC foci, demonstrating direct competitive binding to cellular G-quadruplex sites.
Pretreatment with PDS and Hoechst 33258 increased o-BMVC foci counts, with Hoechst-induced foci progressively resolving following washout in a manner consistent with active DNA repair.

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Implication

Cellular imaging study reveals small-molecule binding dynamics at G-quadruplex DNA structures in cancer cells, highlighting a novel microscopy method to assess ligand targeting and DNA integrity.

Cite This Study

Tseng et al. (2018) studied this question.

synapsesocial.com/papers/69d9d5755e5bcb4e3b837f76 https://doi.org/10.3390/molecules24010035

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Implication

Cellular imaging study reveals small-molecule binding dynamics at G-quadruplex DNA structures in cancer cells, highlighting a novel microscopy method to assess ligand targeting and DNA integrity.

Binding of Small Molecules to G-quadruplex DNA in Cells Revealed by Fluorescence Lifetime Imaging Microscopy of o-BMVC Foci

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Discussion

Implication

Cite This Study

Binding of Small Molecules to G-quadruplex DNA in Cells Revealed by Fluorescence Lifetime Imaging Microscopy of o-BMVC Foci

Key Points

Discussion

Implication

Cite This Study

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