Video 3.

Tfh cell interaction with ICAM-1/2^−/− B cell. The video shows a magnification of a small area in Video 1. Note that Tfh cell (red arrowhead) interacts with the trailing edge of the ICAM-1/2^−/− B1-8^hi B cell (green arrowhead) for few minutes followed by separation of the cells. Bar, 5 µm.

ICAMs support B cell interactions with T follicular helper cells and promote clonal selection

Irina Zaretsky, Ofir Atrakchi, Roei D. Mazor, Liat Stoler-Barak, Adi Biram, Sara W. Feigelson, Alexander D. Gitlin, Britta Engelhardt, and Ziv Shulman

DOI: 10.1084/jem.20171129