Released as monomer and then undergoes aggregation forming oligomers, fibrils and plaques in diseased brains. Ab aggregates are considered as possible targets for therapy and/or diagnosis of AD. Since nanoparticles (NPs) are promising vehicles for imaging probes and therapeutic agents, we realized and characterized two types of NPs (liposomes and solid lipid nanoparticles, 145 and 76 nm average size, respectively) functionalized to target Ab1e42 with high affinity. Preliminary immunostaining studies identified anionic phospholipids [phosphatidic acid (PA) and cardiolipin (CL)] as suitable Ab1e42 ligands. PA/CL-functionalized, but not plain, NPs interacted with Ab1e42 aggregates as indicated by ultracentrifugation experiments, in which binding reaction occurred in solution, and by Surface Plasmon Resonance (SPR) experiments, in which NPs flowed onto immobilized Ab1e42. All these experiments were carried out in buffered saline. SPR studies indicated that, when exposed on NPs surface, PA/CL display very high affinity for Ab1e42 fibrils (22e60 nM), likely because of the occurrence of multivalent interactions which markedly decrease the dissociation of PA/CL NPs from Ab. Noteworthy, PA/CL NPs did not bind to bovine serum albumin. The PA/CL NPs described in this work are endowed with the highest affinity for Ab so far reported. These characteristics make our NPs a very promising vector for the targeted delivery of potential new diagnostic and therapeutic molecules to be tested in appropriate animal models.
Gobbi, M., Re, F., Canovi, M., Beeg, M., Gregori, M., Sesana, M.S., et al. (2010). Lipid-based nanoparticles with high binding affinity for amyloid-b1e42 peptide. BIOMATERIALS, 31(25), 6519-6529.
|Citazione:||Gobbi, M., Re, F., Canovi, M., Beeg, M., Gregori, M., Sesana, M.S., et al. (2010). Lipid-based nanoparticles with high binding affinity for amyloid-b1e42 peptide. BIOMATERIALS, 31(25), 6519-6529.|
|Tipo:||Articolo in rivista - Articolo scientifico|
|Carattere della pubblicazione:||Scientifica|
|Titolo:||Lipid-based nanoparticles with high binding affinity for amyloid-b1e42 peptide|
|Autori:||Gobbi, M; Re, F; Canovi, M; Beeg, M; Gregori, M; Sesana, MS; Sonnino, S; Brogioli, DC; Musicanti, C; Gasco, P; Salmona, M; Masserini, ME|
|Data di pubblicazione:||4-giu-2010|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.biomaterials.2010.04.044|
|Appare nelle tipologie:||01 - Articolo su rivista|