“…11 Functionalization of the outer space of the polymeric nanomicelles to modify its physicochemical or biological properties is of great value from the perspective of design and development of intelligent nano-drug delivery systems, which can be accomplished by constructing micelles with a variety of end-functionalized copolymers. To date, strategic modification of polymeric micelles with functional peptides, saccharides, antibodies, and aptamers on their periphery has been reported, 12,13 with attempt to enhance tumor accumulation, penetration, and retention. The folate receptor, which is expressed normally at the luminal surface of polarized epithelia, 14,15 has been found to be overexpressed in some solid tumors, such as ovarian, endometrial, colorectal, breast, lung, and renal cell carcinoma as well as brain metastases derived from epithelial cancer, and neuroendocrine carcinoma.…”