CCL24 and triple-A syndrome: In M2-like macrophages (Cluster 1), C-C motif chemokine (CCL) genes (Ccl8, Ccl6, Ccl24, Ccl9 and Ccl12) were highly expressed, and their enriched function was “mononuclear cell migration,” implying that M2-like macrophages might contribute to the recruitment of mononuclear cells by producing chemokines in AAA pathogenesis.