CCL20 and triple-A syndrome: Transcriptomic analysis, enzyme-linked immunosorbent assay, UK Biobank database analysis, CellChat analysis, immunofluorescence staining, and mouse models were employed to explore the CCL20-CCR6 axis in AAA.<h4>Results</h4>Substantial immune cell infiltration (T lymphocytes & B lymphocytes) and loss of structural cells (fibroblasts, endothelial cells and smooth muscle cells) were identified using single-cell RNA sequencing datasets.