In BCA sections, no differences were detected in macrophage (CD68), CD3, αSMactin, IgM (Additional file 9 a-d) content while we could not detect any stained areas positive for arginase I and Siglec F. In conclusion, transfer of intraperitoneal transfer of ILC2s in apoE−/− mice affected atherosclerosis by reducing the lipid content of the lesions formed. Here, APOE is linked to atherosclerosis.