Abstract:
:A novel core‑shell type thermo‑nanoparticle (CSTNP) co‑loaded with temozolomide (TMZ) and the fluorescein new indocyanine green dye IR820 (termed IT‑CSTNPs) was designed and combined with a near‑infrared (NIR) laser to realize its photothermal conversion. The IT‑CSTNPs were prepared using a two‑step synthesis method and comprised a thermosensitive shell and a biodegradable core. IR820 and TMZ were entrapped in the shell and the core, respectively. Dynamic light scattering results demonstrated that the average hydrodynamic size of the IT‑CSTNPs was 196.4±3.1 nm with a ζ potential of ‑24.9±1.3 mV. The encapsulation efficiencies of TMZ and IR820 were 6.1 and 16.6%, respectively. Temperature increase curves under NIR laser irradiation indicated that the IT‑CSTNPs exhibited the desired photothermal conversion efficiency. The in vitro drug release curves revealed a suitable release capability of IT‑CSTNP under physiological conditions, whereas NIR laser irradiation accelerated the drug release. Inverted fluorescence microscopy and flow cytometry results revealed that the uptake of IT‑CSTNPs by A375 melanoma cells occurred in a concentration‑dependent manner. Confocal laser scanning microscopy results indicated that IT‑CSTNPs entered tumour cells via endocytosis and were located in intercellular lysosomes. In summary, the present study explored the photothermal conversion capability, cellular uptake, and intracellular localization of IT‑CSTNPs.
journal_name
Oncol Repjournal_title
Oncology reportsauthors
Hou X,Pang Y,Li X,Yang C,Liu W,Jiang G,Liu Ydoi
10.3892/or.2019.7329subject
Has Abstractpub_date
2019-12-01 00:00:00pages
2512-2520issue
6eissn
1021-335Xissn
1791-2431journal_volume
42pub_type
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