Reduced macrophages in AAA lesions from recipient mice receiving CD4+ T cells from Apoe−/−Fcer1a−/− mice yielded lower levels of MHC class-II—marker of inflammation (Zhang et al, 2012)—in these AAA lesions, compared with those receiving CD4+ T cells from Apoe−/− mice, although such difference did not reach statistical significance (Fig 3D, right panel). The gene discussed is CD4; the disease is triple-A syndrome.