Interleukin-1 beta (IL-1β) is a pro-inflammatory cytokine that plays a crucial role in the body's immune response. It is a part of the interleukin-1 family and is produced primarily by activated macrophages, but also by other cell types such as dendritic cells, fibroblasts, and some epithelial cells. IL-1β is involved in various cellular activities, including cell proliferation, differentiation, and apoptosis.
