title: Targeted delivery and controlled release of Paclitaxel for the treatment of lung cancer using single-walled carbon nanotubes.
abstract: A new type of drug delivery system (DDS) based on single-walled carbon nanotubes (SWNTs) for controlled-release of the anti-cancer drug Paclitaxel (PTX) was constructed in this study. Chitosan (CHI) was non-covalently attached to the SWNTs to improve biocompatibility. Biocompatible hyaluronan was also combined to the outer CHI layer to realise the specific targeting property. The results showed that the release of PTX was pH-triggered and was better at lower pH (pH5.5). The modified SWNTs showed a significant improvement in intracellular reactive oxygen species (ROS), which may have enhanced mitogen-activated protein kinase activation and further promoted cell apoptosis. The results of western blotting indicated that the apoptosis-related proteins were abundantly expressed in A549 cells. Lactate dehydrogenase (LDH) release assay and cell viability assay demonstrated that PTX-loaded SWNTs could destroy cell membrane integrity, thus inducing lower cell viability of the A549 cells. Thus, this targeting DDS could effectively inhibit cell proliferation and kill A549 cells, is a promising system for cancer therapy.
authors: Department of Hematology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China.
authors: Baodan
authors: B
authors: Yu
authors: Department of Hematology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China.
authors: Li
authors: L
authors: Tan
authors: Department of Hematology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China.
authors: Runhui
authors: R
authors: Zheng
authors: Department of Hematology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China. Electronic address: tanhuo.2008@163.com.
authors: Huo
authors: H
authors: Tan
authors: Department of Hematology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China. Electronic address: 66593953@qq.com.
authors: Lixia
authors: L
authors: Zheng
mesh_terms: D045744:Cell Line, Tumor; D003692:Delayed-Action Preparations / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D037742:Nanotubes, Carbon / Q000737:chemistry*; D017239:Paclitaxel / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology
chemical_list: D003692:Delayed-Action Preparations; D037742:Nanotubes, Carbon; D017239:Paclitaxel
keywords: Anti-cancer; Chitosan; Hyaluronan; Paclitaxel; Single-walled carbon nanotubes