RT Journal Article T1 Lipid–peptide bioconjugation through pyridyl disulfide reaction chemistry and its application in cell targeting and drug delivery A1 de la Fuente Herreruela, Diego A1 Monnappa, Ajay K. A1 Muñoz Úbeda, Mónica A1 Morallón Piña, Aarón A1 Enciso Rodríguez, Eduardo A1 Sánchez Martín, Luis A1 Giusti, Fabrice A1 Natale, Paolo A1 López-Montero, Iván AB Background: The design of efcient drug delivery vectors requires versatile formulations able to simultaneously direct a multitude of molecular targets and to bypass the endosomal recycling pathway of cells. Liposomal-based vectors need the decoration of the lipid surface with specifc peptides to fulfll the functional requirements. The unspecifc binding of peptides to the lipid surface is often accompanied with uncontrolled formulations and thus preventing the molecular mechanisms of a successful therapy. Results: We present a simple synthesis pathway to anchor cysteine-terminal peptides to thiol-reactive lipids for ade quate and quantitative liposomal formulations. As a proof of concept, we have synthesized two diferent lipopeptides based on (a) the truncated Fibroblast Growth Factor (tbFGF) for cell targeting and (b) the pH sensitive and fusogenic GALA peptide for endosomal scape. Conclusions: The incorporation of these two lipopeptides in the liposomal formulation improves the fbroblast cell targeting and promotes the direct delivery of cargo molecules to the cytoplasm of the cell. Keywords: Smart liposomes, Disulfde bonds, Targeting peptide, GALA, Endosomal escape. PB BMC SN 1477-3155 YR 2019 FD 2019 LK https://hdl.handle.net/20.500.14352/12301 UL https://hdl.handle.net/20.500.14352/12301 LA eng NO The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC grant agreement n° 338133) NO Unión Europea. FP7 DS Docta Complutense RD 5 abr 2025