PEBP1 and triple-A syndrome: Three of these 13 genes exhibited similar expression patterns; the expression of GPX4, phosphatidylethanolamine-binding protein 1 (PEBP1), and SLC2A1 was downregulated in the RAAA samples compared with that in the unruptured AAA samples, and their expression was downregulated in the AAA samples compared with that in the normal aortic wall samples.