A single-cell translocation and secretion assay (TransSeA).

Area of Science:

• Single-cell biology
• Cellular heterogeneity
• Biotechnology

Background:

• Understanding single-cell heterogeneity is crucial for human physiology and disease research.
• Current methods offer limited temporal and molecular insights into single-cell dynamics.
• There is a need for advanced techniques to capture dynamic single-cell processes.

Purpose of the Study:

• To develop and validate a novel assay for time-lapse single-cell analysis.
• To enable molecular cargo analysis of secretions, including extracellular vesicles (EVs).
• To facilitate tracking of cellular phenotypes across generations.

Main Methods:

• Development of the single-cell translocation and secretion assay (TransSeA).
• Time-lapse imaging and analysis of single cells.
• Molecular cargo analysis of extracellular vesicles (EVs).
• Massively parallel single-cell transfer and phenotypic tracking.

Main Results:

• Demonstrated unprecedented single-cell studies on cell secretions and EV cargos.
• Provided insights into microRNAs carried by EVs.
• Revealed relationships between EV secretion rates and gene expression.
• Observed spontaneous, trans-generational phenotypic changes in EV secretion.

Conclusions:

• The TransSeA assay offers a versatile platform for dynamic single-cell studies.
• The assay accelerates discoveries in cellular heterogeneity, secretion dynamics, and inheritance.
• TransSeA provides novel insights into EV cargo and cell-to-cell communication.