Assembly of Glycopeptides in Living Cells Resembling Viral Infection for Cargo Delivery.

Abstract

Self-assembly in living cells represents one versatile strategy for drug delivery; however, it suffers from the limited precision and efficiency. Inspired by viral traits, we here report a cascade targeting-hydrolysis-transformation (THT) assembly of glycosylated peptides in living cells holistically resembling viral infection for efficient cargo delivery and combined tumor therapy. We design a glycosylated peptide via incorporating a β-galactose-serine residue into bola-amphiphilic sequences. Co-assembling of the glycosylated peptide with two counterparts containing irinotecan (IRI) or ligand TSFAEYWNLLSP (PMI) results in formation of the glycosylated co-assemblies SgVEIP, which target cancer cells via β-galactose-galectin-1 association and undergo galactosidase-induced morphological transformation. While GSH-reduction causes release of IRI from the co-assemblies, the PMI moieties release p53 and facilitate cell death via binding with protein MDM2. Cellular experiments show membrane targeting, endo-/lysosome-mediated internalization and in situ formation of nanofibers in cytoplasm by SgVEIP. This cascade THT process enables efficient delivery of IRI and PMI into cancer cells secreting Gal-1 and overexpressing β-galactosidase. In vivo studies illustrate enhanced tumor accumulation and retention of the glycosylated co-assemblies, thereby suppressing tumor growth. Our findings demonstrate an in situ assembly strategy mimicking viral infection, thus providing a new route for drug delivery and cancer therapy in the future.

• Authors: Feng Tian, Ruo-Chen Guo, Chunxia Wu, Xin Liu, Zeyu Zhang, Yamei Wang, Hao Wang, Gongyu Li, Zhilin Yu
• Journal: Angewandte Chemie (International ed. in English) (Angew Chem Int Ed Engl) Pg. e202404703 (Apr 24 2024) ISSN: 1521-3773 [Electronic] Germany
• PMID: 38655625 (Publication Type: Journal Article)
• Copyright: © 2024 Wiley‐VCH GmbH.