Antifading embedding media in confocal immunoflourescence microscopy

Area of Science:

• Microscopy and imaging science
• Biochemistry and molecular biology
• Cell biology

Background:

• Photobleaching of fluorochromes significantly hinders fluorescence microscopy.
• Dye fluorescence intensity and bleaching are influenced by molecular and environmental factors.

Purpose of the Study:

• To evaluate antifading reagents for common dyes like fluorescein isothiocyanate (FITC) and phycoerythrin (PE).
• To identify methods to reduce fluorescence fading in microscopy applications.

Main Methods:

• Tested various antifading reagents on immunofluorescent-stained living and fixed cells.
• Utilized fluorescein isothiocyanate (FITC) and phycoerythrin (PE) as model fluorochromes.
• Assessed fading reduction under continuous illumination.

Main Results:

• N-propyl gallate (NPG) dissolved in glycerol demonstrated the most effective fading reduction for FITC.
• Complete dehydration of cell suspensions also reduced photobleaching effects.
• No single additive completely eliminated fluorescence fading.

Conclusions:

• Antifading reagents can mitigate, but not eliminate, fluorescence photobleaching.
• N-propyl gallate offers a promising solution for reducing FITC fading in microscopy.
• Optimizing sample preparation, such as dehydration, can further combat fluorescence decay.