title: Self-assembled nanoparticles of hydrophobically-modified polysaccharide bearing vitamin H as a targeted anti-cancer drug delivery system.
abstract: Vitamin H (biotin) was incorporated into a hydrophobically modified polysaccharide, pullulan acetate (PA), in order to improve the cancer-targeting activity and internalization of self-assembled nanoparticles. The biotinylated pullulan acetate (BPA) nanoparticles were prepared by a diafiltration method and the mean diameter was approximately 100 nm. Three samples of biotinylated pullulan acetate (BPA), comprising 7 (BPA 1), 20 (BPA 2), and 39 (BPA 3) vitamin H groups per 100 anhydroglucose units of PA, were synthesized. The critical aggregation concentrations (CAC) of the BPA nanoparticles in distilled water were 3.1 x 10(-3), 4.3 x 10(-3) and 6.8 x 10(-3) mg/ml for BPA 1, BPA 2, and BPA 3, respectively. Adriamycin (ADR) was loaded into the BPA nanoparticles as a model drug. The loading efficiencies and ADR content in the BPA nanoparticles decreased with increasing vitamin H content due to a lower hydrophobicity. The RITC-labeled BPA nanoparticles exhibited very strong adsorption to the HepG2 cells, while the RITC-labeled PA nanoparticles did not show any significant interaction. The degree of the interaction increased with increasing vitamin H content. Confocal laser microscopy also revealed that internalization of the BPA nanoparticles into the cancer cells depended on the vitamin H content.
authors.affiliation: College of Pharmacy, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, South Korea.
authors.forename: Kun
authors.initials: K
authors.lastname: Na
authors.forename: Tae
authors.initials: T
authors.lastname: Bum Lee
authors.forename: Keun-Hong
authors.initials: KH
authors.lastname: Park
authors.forename: Eun Kyung
authors.initials: EK
authors.lastname: Shin
authors.forename: Yong-Bok
authors.initials: YB
authors.lastname: Lee
authors.forename: Hoo-Kyun
authors.initials: HK
authors.lastname: Choi
mesh_terms: D000970:Antineoplastic Agents / Q000008:administration & dosage / Q000737:chemistry* / Q000493:pharmacokinetics; D001710:Biotin / Q000008:administration & dosage / Q000737:chemistry* / Q000493:pharmacokinetics; D016503:Drug Delivery Systems / Q000379:methods*; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D036103:Nanotechnology / Q000379:methods*; D011134:Polysaccharides / Q000008:administration & dosage / Q000737:chemistry* / Q000493:pharmacokinetics; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000378:metabolism
chemical_list: D000970:Antineoplastic Agents; D011134:Polysaccharides; D001710:Biotin