IL-2 (Interleukin-2)

Interleukin-2 (IL-2) is a protein naturally produced by certain immune cells, primarily T cells, in response to infections or immune challenges. It plays a crucial role in stimulating the growth, proliferation, and activation of other immune cells, enhancing the body's ability to fight pathogens and infected cells. IL-2 is important for maintaining immune system balance and is also used in medical treatments to boost immune responses, such as in cancer therapy. Essentially, IL-2 acts as a signaling molecule, coordinating and amplifying immune defenses against threats.