Final answer:
Interleukins are proteins that stimulate the growth of T cells, are a type of cytokines, and are crucial for immune response as well as cancer treatment strategies.
Step-by-step explanation:
The proteins that stimulate the growth of T cells are known as interleukins. These are a type of cytokine largely produced by immune system cells, important for the communication between cells during an immune response. Interleukins facilitate the proliferation and differentiation of cells involved in the immune system, including lymphocytes such as T cells and B cells.
Interleukins also play a critical role in hemopoiesis and are now known to be secreted by a variety of cells, not just leukocytes. They are involved in various body functions, including producing immunity and inflammation. Furthermore, interleukins are used as a treatment in certain cancer therapies to boost the immune response against cancer cells.