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Superresolution Imaging with Single-Antibody Labeling.

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    We developed a superresolution microscopy method using sparse single-antibody labeling and time-lapse imaging. This technique enables detailed visualization of subcellular targets and antibody binding in living cells.

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    Area of Science:

    • Biophysics
    • Cell Biology
    • Microscopy

    Background:

    • Superresolution microscopy requires precise labeling of cellular targets.
    • Existing methods can be limited by labeling density and suitability for live-cell imaging.
    • Antibody binding dynamics are crucial for understanding cellular processes.

    Purpose of the Study:

    • To introduce a versatile single-molecule localization microscopy (SMLM) technique.
    • To enable superresolution imaging of antibody binding in the native cellular environment.
    • To demonstrate dual-target and dual-color imaging capabilities.

    Main Methods:

    • Utilizing time-lapse imaging of single-antibody labeling at the subminute timescale.
    • Optimizing antibody concentration for sparse single-molecule binding.
    • Employing dye-conjugated monoclonal and polyclonal antibodies for dual-target imaging.
    • Implementing a dual-color strategy to enhance labeling density.

    Main Results:

    • Achieved superresolution images of subcellular targets through sparse single-antibody binding.
    • Demonstrated successful dual-target superresolution imaging using different antibody types.
    • Showcased a dual-color approach to increase overall sample labeling density.
    • Validated the technique for evaluating antibody binding in live cells.

    Conclusions:

    • Single-antibody labeling offers a novel approach for superresolution microscopy.
    • The technique provides insights into antibody-target interactions within the cellular context.
    • This method enhances the capability for multiplexed imaging and live-cell superresolution studies.