Related Experiment Video
Updated: Jun 9, 2025
10:43
Single-Molecule Diffusion and Assembly on Polymer-Crowded Lipid Membranes
Published on: July 19, 2022
2.2K
Molecular probes for tracking lipid droplet membrane dynamics
Lingxiu Kong1, Qingjie Bai1,2, Cuicui Li3,4,5,6
1School of Pharmaceutical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, 250117, PR China.
Nature Communications
|November 1, 2024
Summary
Researchers developed LDM, a novel molecular probe, to visualize lipid droplet (LD) membranes. This breakthrough enables detailed study of LD membrane dynamics and protein interactions in live cells.
Area of Science:
- Cell Biology
- Biochemistry
- Molecular Probes
Background:
- Lipid droplets (LDs) possess a unique monolayer membrane, challenging to study due to a lack of specific molecular probes.
- Existing probes cannot effectively distinguish the LD membrane from its lipid core.
Purpose of the Study:
- To design and validate a novel molecular probe for specifically labeling and visualizing the LD membrane in live cells.
- To investigate the dynamic mechanisms of LD membrane contacts and protein accumulation.
Main Methods:
- Developed a pro-probe (LDM) with lipophilicity-based targeting and microenvironment-dependent activation.
- LDM releases an active probe (LDM-OH) in response to the HClO/ClO- microenvironment surrounding LDs.
- LDM-OH binds to LD membrane proteins for visualization of the LD membrane.
Main Results:
- Successfully visualized the ring-like LD membrane structure in live cells using the LDM probe.
- Identified dynamic mechanisms of LD membrane contacts.
- Characterized protein accumulation parameters at LD membrane contact sites.
Conclusions:
- LDM is the first molecular probe capable of imaging LD membranes in live cells.
- LDM provides a valuable tool for studying LD-related metabolism and diseases.
- Facilitates drug screening and investigation of LD regulatory mechanisms.
