Laurdan in living cells: Where do we stand?

Area of Science:

• Membrane biophysics
• Cell biology
• Fluorescence microscopy

Background:

• Laurdan is a fluorescent probe used to study lipid membrane phase transitions.
• Its application has expanded from synthetic membranes to live cells due to ease of use.
• Interpreting Laurdan data in cellular environments is more complex than in synthetic bilayers.

Purpose of the Study:

• To review the application of Laurdan in mammalian and bacterial cells.
• To identify limitations hindering direct comparison of Laurdan studies.
• To suggest improvements for enhanced utility of Laurdan in cell membrane research.

Main Methods:

• Compilation of published results on Laurdan use in cells.
• Analysis of methodologies in data recording and processing.
• Identification of inconsistencies across studies.

Main Results:

• Laurdan is effective for analyzing membrane changes in cells under various conditions.
• Significant variability exists in data acquisition and processing methods.
• Lack of standardized reporting impedes cross-publication comparisons.

Conclusions:

• Standardizing Laurdan methodologies and data reporting is crucial.
• Improved comparability will enhance the value of Laurdan in cell membrane research.
• Further development is needed for deeper interpretation of Laurdan data in complex cellular systems.