Analysis of B Cell Migration by Intravital Microscopy

Area of Science:

• Immunology
• Cell Biology
• Microscopy

Background:

• B cells migrate to lymph nodes (LNs) to encounter antigens during immune responses.
• This homing process involves L-selectin-dependent rolling on high endothelial venules (HEVs) and chemokine-mediated integrin activation for firm arrest and extravasation into LNs.

Purpose of the Study:

• To describe an established protocol for detailed in vivo analysis of B cell recruitment to LNs.
• To enable quantification and understanding of B cell migratory behavior under sterile inflammatory conditions.

Main Methods:

• Intravital microscopy (IVM) of the inguinal lymph node (LN).
• Established protocol for data acquisition, exportation, quantification, and statistical analysis using specialized software.
• In vivo visualization and quantification of B cell extravasation.

Main Results:

• The described protocol allows for detailed in vivo analysis of B cell recruitment to LNs.
• The technique enables quantification of B cell extravasation under sterile inflammatory conditions.
• IVM provides insights into B cell migratory behavior during inflammation.

Conclusions:

• Intravital microscopy (IVM) is a powerful technique for studying B cell migration in vivo.
• This protocol facilitates a better understanding of B cell homing and recruitment dynamics during immune responses and inflammation.