TP53 and neoplasm: This work is an attempt to connect selected marine compounds (Chromomycin A2, Psammaplin A, and Ilimaquinone), with autophagic signaling intermediates and TP53 family transcriptional regulators in various human tumor cells (squamous cell carcinoma, glioblastoma, and colorectal carcinoma), to understand and define molecular mechanisms underlying their cooperation in modulation of tumor cell survival upon treatment.