論文 - 詳細
| RRC ID | 72545 |
|---|---|
| 著者 | Ichikawa H, Uneme T, Andoh T, Arita Y, Fujimoto T, Suzuki M, Sakurai Y, Shinto H, Fukasawa T, Fujii F, Fukumori Y. |
| タイトル | Gadolinium-loaded chitosan nanoparticles for neutron-capture therapy: Influence of micrometric properties of the nanoparticles on tumor-killing effect. |
| ジャーナル | Appl Radiat Isot |
| Abstract |
As a nanoparticulate device for controlled delivery of Gd in NCT, the authors have developed gadolinium-loaded chitosan nanoparticles (Gd-nanoCPs). In the present study, influence of micrometric properties such as particle size, particle-surface charge and Gd content of Gd-nanoCPs on tumor-killing effect by Gd-NCT was investigated with Gd-nanoCPs. Two types of Gd-nanoCPs with different mean particle size, zeta potential and Gd-content (Gd-nanoCP-400; 391nm, 28mV, 9wt% and Gd-nanoCP-200; 214nm, 19mV, 24wt%) could be prepared by using chitosans with different molecular weights. Gd-nanoCPs incorporating 1.2mg of natural Gd were injected intratumorally once or twice to mice subcutaneously-bearing B16F10 melanoma. Eight hours after the last administration, thermal neutron was irradiated to tumor region of the mice. Remarkable tumor-growth was observed in both hot and cold control groups. In contrast, Gd-NCT groups showed significant tumor-growth suppression effect, though their efficacy was found to depend on the micrometric properties of Gd-nanoCPs. In particular, the Gd-nanoCP-200 exhibited stronger tumor-killing effect than the Gd-nanoCP-400 at the same Gd dose and it was still similar to Gd-nanoCP-400 in tumor-growth suppressing effect even at the half of Gd dose of Gd-nanoCP-400. This significance in tumor-killing effect would be ascribed from a higher Gd retention in the tumor tissue and an improved distribution of Gd with intratumorally administered Gd-nanoCP-200. Indeed, the Gd concentration in tumor tissue at the time corresponding to the onset of thermal neutron irradiation was determined to be significantly higher in Gd-nanoCP-200, compared with Gd-nanoCP-400. These results demonstrated that appropriate modification of Gd-nanoCPs in micrometric properties would be an effective way to improve the retention of Gd in the tumor tissue after intratumoral injection, leading to the enhanced tumor-killing effect in Gd-NCT. |
| 巻・号 | 88 |
| ページ | 109-13 |
| 公開日 | 2014-6-1 |
| DOI | 10.1016/j.apradiso.2013.12.018 |
| PII | S0969-8043(13)00614-3 |
| PMID | 24462286 |
| MeSH | Animals Boron Neutron Capture Therapy / methods* Cell Line, Tumor Chitosan / chemistry* Gadolinium / administration & dosage* Gadolinium / chemistry Injections, Intralesional Male Melanoma / pathology Melanoma / radiotherapy* Mice Mice, Inbred C57BL Nanocapsules / administration & dosage Nanocapsules / chemistry* Nanocapsules / ultrastructure* Particle Size Radiotherapy Dosage Treatment Outcome |
| IF | 1.27 |
| オルトメトリクス指標 |
オルトメトリクス指標項目
|
| 最多言及媒体 | Patent(IFI CLAIMS) |
| 各媒体での言及数の合計 | 2 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| ヒト・動物細胞 | B16F10(RCB2630) |