Water-Soluble Fluorescent Polymer Dyes with Tunable Emission Spectra for Flow Cytometry Applications
Daniel Berndt1,2, Dorina Glaap1, Travis Jennings1
1Miltenyi Biotec BV & Co. KG, Department Chemical Biology, Friedrich-Ebert-Str. 68, 51429, Bergisch Gladbach, Germany.
Angewandte Chemie (International Ed. in English)
|March 15, 2024
Summary
New fluorescent polymer dyes, excited by a single violet laser, enable multicolor analysis in flow cytometry. These dyes can be used alone or with energy transfer constructs for advanced biological cell discrimination.
Area of Science:
- Biochemistry
- Materials Science
- Analytical Chemistry
Background:
- Fluorescent dyes are crucial for analyzing biological systems and characterizing cell populations using multiparameter flow cytometry.
- Simultaneous analysis of multiple parameters in flow cytometry is limited by the availability of spectrally distinct fluorescent reagents.
- Antibody-fluorophore conjugates are commonly used, but require dyes with unique spectral properties for effective discrimination.
Purpose of the Study:
- To develop novel fluorescent polymer dyes with unique emission spectra, excitable by a single violet laser (405 nm).
- To investigate the use of these polyfluorene-based polymers, individually or in energy transfer constructs, for red-shifting emission wavelengths.
- To demonstrate the utility of these polymer dyes as effective reagents in biological flow cytometry assays.
Main Methods:
- Synthesis of a series of polyfluorene-based fluorescent polymer dyes.
- Characterization of spectral properties, including excitation and unique emission spectra.
- Construction of energy transfer (FRET) systems by combining polymer dyes with small-molecule dyes.
- Conjugation of polymer dyes to antibodies for application in flow cytometry.
Main Results:
- Development of spectrally unique, bright, and water-soluble fluorescent polymer dyes.
- Demonstration that these dyes can be distinguished by their unique emission spectra despite a single excitation source (405 nm violet laser).
- Successful application of antibody-conjugated polymer dyes in a biological flow cytometry assay, proving their effectiveness.
- Exploration of FRET constructs to achieve red-shifted emission wavelengths.
Conclusions:
- The developed polyfluorene-based polymer dyes offer a new class of reagents for multicolor flow cytometry.
- These dyes provide a versatile platform for expanding the number of parameters detectable in flow cytometry.
- The systematic investigation establishes structure-property relationships for this class of fluorescent dyes, guiding future development.
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