期刊
ACS NANO
卷 14, 期 11, 页码 15654-15668出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c06541
关键词
platelet; hypoxia; gold nanoparticles; hemoglobin; radiotherapy
类别
资金
- National Science and Technology Major Project [2017YFA0205400]
- National Natural Science Foundation of China [51973091, 51773089, 21874077]
- Natural Science Foundation of Jiangsu Province [BK20181204, BK20171258]
- Key R&D Projects of Jiangsu Province
- Science and Technology R&D Fund of Nantong City [JC2019139]
Radiotherapy (RT) is a widely explored clinical modality to combat cancer. However, its therapeutic efficacy is not always satisfied because of the severe hypoxic microenvironment in solid tumors and the high dosage of radiation harmful to the adjacent healthy tissue. Herein, Au nanoparticle-hemoglobin complex nanoparticle loaded platelets (Au-Hb@PLT) were fabricated. These Au-Hb@PLT would be activated by tumor cells, and the formed platelet-derivate particles (PM) could deliver Au nanoparticle-hemoglobin complex deeply into tumor tissue because of their small size and tumor homing ability. Hemoglobin acts as an oxygen carrier to relieve the hypoxia and gold nanoparticles work as radiosensitizers to potentiate the sensitivity of tumor cells to X-ray, thus, enhancing the in vivo therapeutic outcome even under a low-dose RT in tumor bearing mice. The enhanced antitumor effect and survival benefits endowed by the Au-Hb@PLT were confirmed in vitro and in vivo. These results demonstrate that these Au-Hb@PLT can work as an oxygen vehicle, offer a promising approach to mitigate hypoxia and improve RT efficacy with a low RT dosage.
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