Interleukin 6 (IL-6) has an important role in angiotensin (Ang)-II-induced hypertension and chronic kidney disease (CKD), say researchers. Zhang et al. found that expression of IL-6 was increased in kidneys of patients with CKD and even further increased in kidneys of patients with CKD and hypertension. Ang II caused IL-6 induction in mouse kidneys and genetic deletion of IL-6 led to reduced hypertension and a decrease in renal injury in Ang-II-infused mice.