Single-particle combinatorial multiplexed liposome fusion mediated by DNA

Area of Science:

• Synthetic biochemistry
• Biomedical sciences
• Nanotechnology

Background:

• High-throughput screening is crucial but often limited by time and cost.
• Existing methods require large-scale analyses, hindering efficiency.
• Need for cost-effective, rapid screening tools in biochemistry and medicine.

Purpose of the Study:

• To develop a novel single-particle combinatorial method for high-throughput screening.
• To enable parallelized, multistep, and non-deterministic fusion of nanocontainers.
• To reduce material costs and analysis time in biochemical and biomedical research.

Main Methods:

• Utilized DNA-mediated liposome fusion for combinatorial multiplexing.
• Employed single-particle analysis of subattolitre nanocontainers.
• Used surface-tethered target liposomes and diffusing cargo liposomes with DNA functionalization and fluorescent barcoding.
• Applied real-time total internal reflection imaging and machine learning for data analysis.

Main Results:

• Achieved efficient (>93%) and leakage-free stochastic fusion sequences.
• Observed and classified over 16,000 fusions and 566 distinct fusion sequences.
• Demonstrated high-density arrays of nanocontainers (~42,000/mm²).
• Enabled combinatorial multiplex screening using picograms of material.

Conclusions:

• Single-particle combinatorial multiplexed liposome fusion offers a powerful new screening platform.
• The DNA-mediated approach significantly enhances efficiency and reduces costs.
• This technology has broad implications for accelerating discovery in synthetic biochemistry and biomedical sciences.