Methods for Single-Cell Pulse-Chase Analysis of Nuclear Components

Area of Science:

• Cell biology
• Biochemistry
• Molecular dynamics

Background:

• Traditional pulse-chase methods provide ensemble measurements, limiting insights into single-cell behavior.
• Understanding dynamic biological processes at the single-cell level is crucial for deciphering cellular heterogeneity and function.

Purpose of the Study:

• To develop and exemplify novel single-cell level pulse-chase techniques.
• To enable time-dependent studies of molecular trafficking and protein maturation in individual cells.

Main Methods:

• Developed three distinct single-cell pulse-chase methodologies: true pulse-chase, photoactivation, and pharmacological induction.
• Applied these methods to track nuclear envelope targeting of phospholipids and lamin proteins (lamin B1, prelamin A).

Main Results:

• Successfully demonstrated the application of single-cell pulse-chase techniques for dynamic molecular tracking.
• Visualized region-selective nuclear envelope targeting of nascent phospholipids and proteins in real-time within single cells.

Conclusions:

• The novel single-cell pulse-chase methods significantly advance the study of dynamic biological processes.
• These techniques offer unprecedented resolution for investigating molecular evolution and trafficking at the individual cell level.