Zhou et al. fabricated a PEGlyated melanin-like PDA NP decorated with a cyclic Arg-Gly-Asp (RGD) peptide which is famous for binding integrin overexpressed in tumor tissues, and a beclin 1-derived peptide (denoted as beclin 1) which is the product of a putative gene related to the upregulation of autophagy [133]. Here, BECN1 is linked to neoplasm.