IL33 and abdominal aortic aneurysm: In contrast, A. muciniphila was observed to decrease the expression of interleukin-33 (IL-33) and the levels of interleukin-6 (IL-6) and IFN-γ in mice with abdominal aortic aneurysm, while simultaneously increasing the concentrations of IL-4 and IL-10 (26).