title: Penetratin Peptide-Functionalized Gold Nanostars: Enhanced BBB Permeability and NIR Photothermal Treatment of Alzheimer's Disease Using Ultralow Irradiance.
abstract: The structural changes of amyloid-beta (Aβ) from nontoxic monomers into neurotoxic aggregates are implicated with pathogenesis of Alzheimer's disease (AD). Over the past decades, weak disaggregation ability and low permeability to the blood-brain barrier (BBB) may be the main obstacles for major Aβ aggregation blockers. Here, we synthesized penetratin (Pen) peptide loaded poly(ethylene glycol) (PEG)-stabilized gold nanostars (AuNS) modified with ruthenium complex (Ru@Pen@PEG-AuNS), and Ru(II) complex as luminescent probes for tracking drug delivery. We revealed that Ru@Pen@PEG-AuNS could obviously inhibit the formation of Aβ fibrils as well as dissociate preformed fibrous Aβ under the irradiation of near-infrared (NIR) due to the NIR absorption characteristic of AuNS. More importantly, this novel design could be applied in medicine as an appropriate nanovehicle, being highly biocompatible and hemocompatible. In addition, Ru@Pen@PEG-AuNS had excellent neuroprotective effect on the Aβ-induced cellular toxicity by applying NIR irradiation. Meanwhile, Pen peptide could effectively improve the delivery of nanoparticles to the brain in vitro and in vivo, which overcame the major limitation of Aβ aggregation blockers. These consequences illustrated that the enhanced BBB permeability and efficient photothermolysis of Ru@Pen@PEG-AuNS are promising agents in AD therapy.
authors.affiliation: Department of Chemistry, Jinan University , Guangzhou 510632, China.
authors.forename: Tiantian
authors.initials: T
authors.lastname: Yin
authors.affiliation: Department of Chemistry, Jinan University , Guangzhou 510632, China.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Xie
authors.affiliation: Department of Chemistry, Jinan University , Guangzhou 510632, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Sun
authors.affiliation: Department of Chemistry, Jinan University , Guangzhou 510632, China.
authors.forename: Licong
authors.initials: L
authors.lastname: Yang
authors.affiliation: Department of Chemistry, Jinan University , Guangzhou 510632, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
mesh_terms: D000544:Alzheimer Disease / Q000628:therapy*; D000818:Animals; D001812:Blood-Brain Barrier / Q000378:metabolism*; D002352:Carrier Proteins / Q000737:chemistry* / Q000494:pharmacology; D002460:Cell Line; D057846:Cell-Penetrating Peptides; D006046:Gold / Q000737:chemistry*; D006801:Humans; D007259:Infrared Rays; D051379:Mice; D008819:Mice, Nude; D053758:Nanoparticles / Q000737:chemistry*; D010455:Peptides / Q000737:chemistry; D010539:Permeability / Q000187:drug effects; D010789:Phototherapy / Q000379:methods*
chemical_list: D002352:Carrier Proteins; D057846:Cell-Penetrating Peptides; D010455:Peptides; D006046:Gold; C414409:penetratin
keywords: Alzheimer’s disease; amyloid-beta; blood−brain barrier; gold nanostars; penetratin peptide