Caffeic Acid Phenethyl Ester (CAPE), a bioactive propolis component, acts as an NF-kappa B inhibitor with antineoplastic and cytoprotective properties. It suppresses pathways like Akt and p70S6K, and research shows it inhibits vascular smooth muscle cell proliferation via p38 MAPK/HIF-1alpha, making it relevant for oncology, immunology, and cardiovascular disease studies in vitro and in vivo.