Molassamide (Figure 3B), isolated from the marine cyanobacterium DRTO-73, showed a dual action on the migration of highly invasive MDA-MB-231 breast cancer cells by modulating both elastase-induced intercellular adhesion molecule (ICAM)-1 gene expression and ICAM-1 proteolytic processing by elastase [63]. This evidence concerns the gene ICAM1 and breast cancer.