Intracellular Postpolymerization Modification via Bioorthogonal Click Chemistry Monitored by Förster Resonance Energy...

Area of Science:

• Polymer Chemistry
• Cellular Engineering
• Biomolecular Science

Background:

• Multifunctional polymers are crucial for applications like drug delivery and cancer treatment.
• Direct intracellular polymerization is challenging, necessitating external synthesis and internal modification.
• Intracellular postpolymerization modification (iPPM) offers a viable alternative for creating functional polymers within cells.

Purpose of the Study:

• To develop and validate a method for intracellular postpolymerization modification (iPPM) of polymers.
• To utilize Förster resonance energy transfer (FRET) for real-time monitoring of intracellular polymer reactions.
• To demonstrate the synthesis of functionalized polymers within cellular environments for diverse applications.

Main Methods:

• Synthesis of azide-containing polymers outside cells.
• Introduction of FRET donor (NBD) and acceptor (RhB-PEG-DBCO) components.
• Intracellular copper-free click chemistry reaction between azide and DBCO groups.
• Real-time FRET analysis to confirm postpolymerization modification within cells.

Main Results:

• Successful intracellular postpolymerization modification was achieved using copper-free click chemistry.
• Förster resonance energy transfer (FRET) effectively confirmed the occurrence of the reaction in real time.
• The developed method allows for the creation of multifunctional polymers directly within cellular environments.

Conclusions:

• Intracellular postpolymerization modification (iPPM) combined with FRET is a powerful strategy for developing advanced cellular materials.
• This technique enables the precise engineering of polymers within cells for applications in medicine and biotechnology.
• The study provides a foundation for designing novel multifunctional polymers for targeted cellular interventions.