Microscopic Visualization of Cell-Cell Adhesion Complexes at Micro and Nanoscale

Area of Science:

• Cell Biology
• Microscopy
• Biophysics

Background:

• Cell-cell adhesion is mediated by specialized junctional structures that mechanically link cytoskeletons.
• Adherens junctions, tight junctions, and desmosomes are the primary adhesion complexes involved in cell communication.
• Microscopy is essential for visualizing these structures in physiological and pathological contexts.

Purpose of the Study:

• To review light and electron microscopy techniques for analyzing cell-cell adhesion complexes.
• To provide a guide for selecting appropriate imaging methods for specific adhesion complexes.
• To highlight emerging microscopy techniques and discuss common challenges in the field.

Main Methods:

• Light microscopy techniques (e.g., confocal, super-resolution).
• Electron microscopy techniques (e.g., TEM, SEM, cryo-EM).
• Correlative light and electron microscopy (CLEM).

Main Results:

• Detailed overview of various microscopy techniques applicable to adherens junctions, tight junctions, and desmosomes.
• Discussion on the strengths and limitations of each technique for structure and composition analysis.
• Identification of current challenges and future directions in microscopic analysis of cell adhesion.

Conclusions:

• Microscopy is indispensable for understanding the morphology and function of cell-cell adhesion complexes.
• The choice of microscopy technique depends on the specific research question and the adhesion complex of interest.
• Continued advancements in microscopy promise deeper insights into cell adhesion mechanisms.