Objective:

To develop a super-resolution microscopy method to visualize how therapeutic antibodies target and destroy cancerous B cells.

Approach:

• Microscopy Method: The study utilized LLS-TDI-DNA-PAINT to provide 3D visualizations of antibody–cell interactions.
• Antibody Study: Four therapeutic antibodies (RTX, OFA, OBZ, and 2H7) were studied on Raji B cells to observe their effects on CD20 protein clustering.

Key Findings:

• All four antibodies cluster CD20 molecules on specific locations of the cell membrane, particularly on microvilli.
• This clustering polarizes the cell membrane, giving B cells a hedgehog-like appearance.
• The study challenges the existing classification of therapeutic antibodies into Type I and Type II, showing similar behaviors among all tested antibodies.

Interpretation:

Limitations:

• Further research is needed to confirm the implications of antibody-induced polarization on the activation of other immune cells.

Conclusion:

Sources:

• University of Wuerzburg