Immunofluorescent staining of γH2AX and αSMA in aortas revealed increased γH2AX foci in VSMCs of EPO‐induced AAA relative to the vehicle group, and γH2AX foci were scanty in VSMCs of EPO + medium‐dose formoterol group (Figure 5C,D). Here, ACTA1 is linked to triple-A syndrome.