CXCL12 and triple-A syndrome: By transfecting the MiR206‐3p sponge to reduce the level of MiR206‐3p in AAA, the effects of the CXCL12/CXCR4 pathway on AAA progression as well as the apoptosis and phenotypic transformation of vascular smooth muscle cells (VSMCs) were studied in vivo and in vitro.