IL6 and triple-A syndrome: 2018). We examined IL‐6 protein expression in angiotensin II‐induced AAA in ApoE−/− mice. Immunohistochemistry showed a strong immune reaction for IL‐6 in the aortic wall in the control group, while this reaction was moderate in CJ‐42794‐treated mice (Fig. 2A). The area of positive immunoreaction for IL‐6 in the tunica media was greater in the control group than in CJ‐42794‐treated group (Fig. 2B). In addition, an ELISA demonstrated that CJ‐42794 administration decreased IL‐6 protein concentrations in the angiotensin II‐treated mouse aorta (Fig. 2C).