CD40-CD40L interaction

The CD40-CD40L interaction is a crucial part of the immune system's communication. CD40 is a receptor found on certain immune cells, like B cells, while CD40L (CD40 ligand) is a protein on activated helper T cells. When these two bind together, they send signals that help activate immune responses, such as producing antibodies or attacking infected cells. This interaction ensures that the immune system responds appropriately to threats and maintains immune health. Disruptions in this process can lead to immune deficiencies or autoimmune disorders.