After stroke, effector T cells migrate from the intestine to the meninges, because the decrease in IL-17+ γδT cells reduces CXCL1 and CXCL2 expression in ischaemic brain tissue, thereby reducing the migration and infiltration of leukocytes into the ischaemic brain tissue and the resulting brain tissue damage [112]. This evidence concerns the gene CXCL1 and Stroke.