David Figge News Today

Follicular helper T cells, or Tfh cells, have a crucial role in immune defense. Without Tfh cells, B cells cannot form germinal center, or GC, responses during which high-affinity antibodies are generated.

Some PD-1+CXCR5+CD4+ T cells will become germinal center-Tfh cells that are essential for B cells to become high-affinity antibody-producing cells. Others do not take that path, instead becoming memory T cells. Fangming...