After acute cerebral ischemia, damaged neurons and glial cells secrete proinflammatory factors such as IL-1β and TNF-α, which increase the permeability of the blood‒brain barrier by directly affecting multiple capillaries, leading to cerebral edema and allowing peripheral immune cells and cytokines to enter brain tissue, further aggravating inflammation and brain injury (Fu et al. 2015). This evidence concerns the gene IL1B and brain ischemia.