title: Tumor targetability and antitumor effect of docetaxel-loaded hydrophobically modified glycol chitosan nanoparticles.
abstract: Hydrophobically modified glycol chitosan (HGC) nanoparticles, a new nano-sized drug carrier, were prepared by introducing a hydrophobic molecule, cholanic acid, to water soluble glycol chitosan. The HGC nanoparticles were easily loaded with the anticancer drug docetaxel (DTX) using a dialysis method, and the resulting docetaxel-loaded HGC (DTX-HGC) nanoparticles formed spontaneously self-assembled aggregates with a mean diameter of 350 nm in aqueous condition. The DTX-HGC nanoparticles were well dispersed and stable for 2 weeks under physiological conditions (pH 7.4 and 37 degrees C) and a sustained drug release profile, in vitro. In addition, the DTX-HGC nanoparticles were reasonably stable in the presence of excess bovine serum albumin, which suggested that the DTX-HGC nanoparticles might also be stable in the blood stream. The DTX-HGC nanoparticles exhibited a distinctive deformability in aqueous conditions, in that they could easily pass through a filter membrane with 200 nm pores despite their mean diameter of 350 nm. We also evaluated the time-dependent excretion profile, in vivo biodistribution, prolonged circulation time, and tumor targeting ability of DTX-HGC nanoparticles by using a non-invasive live animal imaging technology. Finally, under optimal conditions for cancer therapy, the DTX-HGC nanoparticles showed higher antitumor efficacy such as reduced tumor volume and increased survival rate in A549 lung cancer cells-bearing mice and strongly reduced the anticancer drug toxicity compared to that of free DTX in tumor-bearing mice. Together our results showed that the anticancer loaded nano-sized drug carriers are a promising nano-sized drug formulation for cancer therapy.
authors: Department of Bioengineering, College of Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
authors: Ho-Young
authors: HY
authors: Hwang
authors: In-San
authors: IS
authors: Kim
authors: Ick Chan
authors: IC
authors: Kwon
authors: Yong-Hee
authors: YH
authors: Kim
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000493:pharmacokinetics / Q000627:therapeutic use*; D045744:Cell Line, Tumor; D048271:Chitosan / Q000737:chemistry / Q000493:pharmacokinetics / Q000627:therapeutic use*; D000077143:Docetaxel; D004337:Drug Carriers / Q000737:chemistry / Q000493:pharmacokinetics / Q000627:therapeutic use*; D004355:Drug Stability; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D008297:Male; D051379:Mice; D008819:Mice, Nude; D053758:Nanoparticles / Q000737:chemistry / Q000627:therapeutic use*; D009369:Neoplasms / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D010316:Particle Size; D043823:Taxoids / Q000737:chemistry / Q000493:pharmacokinetics / Q000627:therapeutic use*; D047368:Tumor Burden / Q000187:drug effects; D023041:Xenograft Model Antitumor Assays
chemical_list: D000970:Antineoplastic Agents; D004337:Drug Carriers; D043823:Taxoids; C118638:glycol-chitosan; D000077143:Docetaxel; D048271:Chitosan