What is the function of interleukins in the immune system?

Interleukins are a group of cytokines, which are proteins that play a crucial role in the immune system by facilitating communication between cells. They are produced by various immune cells and serve to regulate and direct immune responses, influencing the development, activation, and differentiation of immune cells. The primary function of interleukins is to act as signaling molecules that help coordinate the immune response by ensuring that different cells can communicate effectively, thereby maintaining immune homeostasis.

Understanding this communication aspect is vital, as interleukins ensure that immune cells can relay information about pathogens, infection levels, and the overall state of the immune system. This is essential for mounting an effective response to threats while preventing overreaction that could lead to autoimmune conditions.

The other options focus on specific roles that some immune components play, such as killing bacteria, triggering inflammation, or producing antibodies, but these functions are not the direct purpose of interleukins themselves. Instead, those actions may be influenced by interleukins as they help orchestrate the immune response.