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An aryleneethynylene fluorophore for cell membrane staining.

Antonio Cardone1, Francesco Lopez, Francesco Affortunato

  • 1Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici, Bari, Italy.

Biochimica Et Biophysica Acta
|July 4, 2012
PubMed
Summary

A novel amphiphilic aryleneethynylene fluorophore effectively labels cell membranes in both fixed and living mammalian cells. This bright blue dye offers pH stability and excellent photostability for advanced biological imaging applications.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Materials Science

Background:

  • Fluorescent probes are essential tools in biological research.
  • Developing novel probes with improved properties is crucial for advanced imaging.
  • Aryleneethynylene molecules show promise as luminescent materials.

Purpose of the Study:

  • To demonstrate the utility of a novel amphiphilic aryleneethynylene fluorophore as a plasma membrane marker.
  • To evaluate the dye's optical properties, including pH independence and fluorescence enhancement in lipidic environments.
  • To assess its suitability for live cell imaging and multicolor immunofluorescence.

Main Methods:

  • Synthesis and characterization of the amphiphilic aryleneethynylene fluorophore.
  • Spectroscopic analysis using unilamellar liposomes.
  • Staining and imaging of fixed and living mammalian cells.
  • Evaluation in multicolor immunofluorescence experiments.

Main Results:

  • The fluorophore functions as an effective plasma membrane marker in various biological systems.
  • Optical properties exhibit minimal pH dependence between pH 5.0 and 8.0.
  • Fluorescence intensity significantly increases upon incorporation into lipidic membranes.
  • Demonstrated fast staining, good photostability, and suitability for live cell imaging.
  • Validated as a reliable blue membrane marker in multicolor immunofluorescence.

Conclusions:

  • The novel aryleneethynylene fluorophore is a versatile and robust plasma membrane marker.
  • Its properties make it highly valuable for live cell imaging and multicolor fluorescence microscopy.
  • This work expands the application of aryleneethynylene molecules in biological luminescence.