GluN2B Subunit Labeling with Fluorescent Probes and High-Resolution Live Imaging

Area of Science:

• Neuroscience
• Molecular Biology
• Cell Biology

Background:

• Laser Scanning Confocal Microscopy (LSCM) is vital for visualizing molecular targets in living cells.
• Fluorescent probes are essential for studying receptor expression, location, and trafficking.
• The properties of fluorescent probes significantly impact their utility.

Purpose of the Study:

• To prepare a specific fluorescent probe for the NMDAR GluN2B receptor.
• To evaluate the probe's binding and inhibitory effects on GluN2B in vitro.
• To visualize and image GluN2B in living cortical neurons using confocal microscopy.

Main Methods:

• Conjugation of fluorescein to an ifenprodil-based ligand to create the probe.
• In vitro functional assay using calcium imaging to assess GluN2B binding and inhibition.
• Labeling and confocal imaging of GluN2B in DS-red labeled living cortical neurons.

Main Results:

• A specific fluorescent probe for NMDAR GluN2B was successfully synthesized.
• The probe demonstrated effective binding and inhibition of GluN2B in functional assays.
• Successful labeling and high-resolution imaging of GluN2B in living neurons were achieved.

Conclusions:

• The developed fluorescent probe is suitable for high-resolution imaging of NMDAR GluN2B in living cells.
• This probe facilitates the study of receptor expression, localization, and trafficking.
• The method enables functional evaluation of receptor activity and drug interactions.