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Investigating dye performance and crosstalk in fluorescence enabled bioimaging using a model system.

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We developed a novel model system using doped zeolites in stained polyvinyl alcohol (PVA) films to benchmark fluorescence microscopy instrumentation and methods. This accessible system allows for precise evaluation of fluorophore performance, including cross-talk and bleaching, before complex biological applications.

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Area of Science:

  • Biophysics
  • Materials Science
  • Microscopy

Background:

  • Fluorescence microscopy enables detailed imaging of sub-diffraction limit biological structures.
  • Advances in bioimaging hardware complicate inter-study and inter-group comparisons.
  • Standardized benchmarking is needed for instrumentation, methods, and staining procedures.

Purpose of the Study:

  • To introduce a novel model system for benchmarking bioimaging instrumentation and methods.
  • To emulate the complexity of biological systems for evaluating fluorophore performance.
  • To quantify fluorophore concentration, brightness, cross-talk, and bleaching effects.

Main Methods:

  • Development of a model system using lanthanide (III) ion doped Linde Type A zeolites in polyvinyl alcohol (PVA) films.
  • Staining the PVA film with fluorophores (F18, MitoTracker Red, ATTO647N).
  • Testing and quantifying fluorophore performance, including cross-talk and bleaching, under varying experimental conditions.

Main Results:

  • The zeolite-PVA model system effectively emulates biological complexity for bioimaging benchmarks.
  • Significant fluorophore cross-talk was observed when exchanging excitation and emission settings.
  • Quantification of dye bleaching was successfully performed using the model system.

Conclusions:

  • The proposed zeolite-PVA model system provides an accessible and effective platform for benchmarking bioimaging techniques.
  • This model facilitates the testing and optimization of staining procedures prior to application in complex biological samples.
  • It enables direct comparison of fluorophore performance, aiding in the selection of optimal probes and imaging parameters.