title: The influence of polycaprolactone coating on the internalization and cytotoxicity of gold nanoparticles.
abstract: The interaction between mesoscopic colloids and cells is largely dependent on the particle size and surface properties. Under a mild reaction condition, gold particles with an average diameter of approximately 100 nm were prepared by incubating poly(dimethylsiloxane) film in HAuCl4/acetic acid solution. The particles were then transferred into a polycaprolactone (PCL) film by thermal pressing. Bare and PCL-coated particles were obtained by control over the extent of rinsing. The bare and PCL-coated gold particles were co-cultured with ECV-304 cells to examine the particle internalization and their influence on the cell morphology and cytotoxicity. Transmission electron microcopy observed the subcellular distribution of the gold particles, which were found in the cell compartments (endosomes or lysosomes), cytoplasm, nucleic envelope, and even nucleus regardless of the existence of PCL coating. However, scanning electron microscopy and beta-tubulin staining revealed a significant change in terms of the cell morphology and cytoskeleton caused by the bare gold particles. Higher cytotoxicity was also determined for the bare gold particles. By contrast, no significant difference of the cell morphology and cytoskeleton change was caused by the PCL-coated gold particles, which have also shown lower cytotoxicity.
authors: Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, China.
authors: Zhengwei
authors: Z
authors: Mao
authors: Bo
authors: B
authors: Wang
authors: Lie
authors: L
authors: Ma
authors: Changyou
authors: C
authors: Gao
authors: Jiacong
authors: J
authors: Shen
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D002460:Cell Line; D048429:Cell Size / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects*; D020099:Coated Materials, Biocompatible / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics; D004305:Dose-Response Relationship, Drug; D042783:Endothelial Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D006046:Gold / Q000008:administration & dosage* / Q000737:chemistry / Q000493:pharmacokinetics; D006801:Humans; D008422:Materials Testing; D053758:Nanoparticles / Q000008:administration & dosage* / Q000737:chemistry; D011091:Polyesters / Q000008:administration & dosage* / Q000493:pharmacokinetics*
chemical_list: D020099:Coated Materials, Biocompatible; D011091:Polyesters; C016240:polycaprolactone; D006046:Gold