AngII infusion resulted in lethality due to AAA rupture in 5 out of 13 p55−/−LDLR−/− within the first 10 days, while only one mouse out of 14 from the p55+/+LDLR−/− group died due to AAA rupture, 26 days after the start of AngII administration. This evidence concerns the gene LDLR and triple-A syndrome.