APP and adenocarcinoma: We conditioned APP-over-expressing cells (7W cells) and its parental cell line CHO cells for 36 hrs, and harvested Aβ-rich 7W CM and control CHO CM, then applied them to 6 wells of adenocarcinoma MDA-MB231-L cells, respectively (Fig. 2A, top panel CHO CM, lower panel 7W CM).