title: Brain-targeting gene delivery and cellular internalization mechanisms for modified rabies virus glycoprotein RVG29 nanoparticles.
abstract: A 29 amino-acid peptide derived from the rabies virus glycoprotein (RVG29) was exploited as a ligand for efficient brain-targeting gene delivery. RVG29 was modified on polyamidoamine dendrimers (PAMAM) through bifunctional PEG, then complexed with DNA, yielding PAMAM-PEG-RVG29/DNA nanoparticles (NPs). The NPs were observed to be uptaken by brain capillary endothelial cells (BCECs) through a clathrin and caveolae mediated energy-depending endocytosis. The specific cellular uptake can be inhibited by free RVG29 and GABA but not by nicotinic acetylcholine receptor (nAchR) agonists/antagonists, indicating RVG29 probably relates to the GABA(B) receptor besides nAchR reported previously. PAMAM-PEG-RVG29/DNA NPs showed higher blood-brain barrier (BBB)-crossing efficiency than PAMAM/DNA NPs in an in vitro BBB model. In vivo imaging showed that the NPs were preferably accumulated in brain. The report gene expression of the PAMAM-PEG-RVG29/DNA NPs was observed in brain, and significantly higher than unmodified NPs. Thus, PAMAM-PEG-RVG29 provides a safe and noninvasive approach for the gene delivery across the BBB.
authors.affiliation: Department of Pharmaceutics, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, PR China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Rongqin
authors.initials: R
authors.lastname: Huang
authors.forename: Liang
authors.initials: L
authors.lastname: Han
authors.forename: Weilun
authors.initials: W
authors.lastname: Ke
authors.forename: Kun
authors.initials: K
authors.lastname: Shao
authors.forename: Liya
authors.initials: L
authors.lastname: Ye
authors.forename: Jinning
authors.initials: J
authors.lastname: Lou
authors.forename: Chen
authors.initials: C
authors.lastname: Jiang
mesh_terms: D000818:Animals; D001812:Blood-Brain Barrier / Q000378:metabolism; D001921:Brain / Q000166:cytology / Q000378:metabolism*; D002196:Capillaries / Q000166:cytology; D002478:Cells, Cultured; D004279:DNA, Viral / Q000737:chemistry / Q000378:metabolism; D050091:Dendrimers; D004337:Drug Carriers / Q000737:chemistry / Q000378:metabolism; D004705:Endocytosis / Q000502:physiology; D042783:Endothelial Cells / Q000166:cytology / Q000378:metabolism; D015870:Gene Expression; D018014:Gene Transfer Techniques; D015316:Genetic Therapy / Q000379:methods*; D005822:Genetic Vectors / Q000235:genetics / Q000378:metabolism; D008297:Male; D008422:Materials Testing; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D053758:Nanoparticles; D011073:Polyamines / Q000737:chemistry / Q000378:metabolism; D011820:Rabies virus / Q000737:chemistry*; D014759:Viral Envelope Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
chemical_list: D004279:DNA, Viral; D050091:Dendrimers; D004337:Drug Carriers; C104700:PAMAM Starburst; D011073:Polyamines; D014759:Viral Envelope Proteins; D005680:gamma-Aminobutyric Acid