POSA for fast, amplified and multiplexed protein imaging
Wenkang Zhang1, Hengfeng Jiang1, Liang Han2
1Department of Materials Science and Engineering, Southern University of Science and Technology, Nanshan District, Shenzhen, Guangdong, China.
Nature Communications
|March 7, 2025
Summary
We developed a novel π-conjugated polymer-based amplification (POSA) method for highly multiplexed molecular imaging in single cells. This technique enhances fluorescent polymer signals, enabling clearer visualization of subcellular biomolecules.
Area of Science:
- Biomolecular Imaging
- Polymer Science
- Cell Biology
Background:
- Fluorescent π-conjugated polymers (FCPs) offer high brightness but are limited in single-cell multiplexed imaging due to hydrophobicity and poor biomolecule targeting.
- Existing methods struggle with resolving multiplexed protein distribution within single cells.
Purpose of the Study:
- To develop a novel signal amplification method for highly multiplexed molecular imaging in single cells.
- To overcome the limitations of FCPs in biological applications.
- To demonstrate enhanced imaging of subcellular biomolecules.
Main Methods:
- Developed a π-conjugated polymer-based amplification (POSA) method.
- Utilized the inherent high brightness of FCPs for optical amplification.
- Applied the POSA technique for spatially resolved imaging of multiplexed proteins in single cells.
Main Results:
- Achieved highly multiplexed signal amplification using the POSA method.
- Demonstrated a 28- to 126-fold signal amplification effect.
- Successfully visualized subcellular biomolecules and showcased optical amplification at the cellular level.
Conclusions:
- The POSA method provides a simple, quick, and sensitive tool for advanced biological research.
- POSA enables enhanced imaging of multiplexed proteins in single cells.
- This technique significantly improves the utility of FCPs for cellular imaging.
