Docetaxel-loaded solid lipid nanoparticles prevent tumor growth and lung metastasis of 4T1 murine mammary carcinoma cells

Autor: Márcia Cristina Oliveira da Rocha, Patrícia Bento da Silva, Marina Arantes Radicchi, Bárbara Yasmin Garcia Andrade, Jaqueline Vaz de Oliveira, Tom Venus, Carolin Merker, Irina Estrela-Lopis, João Paulo Figueiró Longo, Sônia Nair Báo
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Journal of Nanobiotechnology, Vol 18, Iss 1, Pp 1-20 (2020)
Druh dokumentu: article
ISSN: 1477-3155
DOI: 10.1186/s12951-020-00604-7
Popis: Abstract Background Metastasis causes the most breast cancer-related deaths in women. Here, we investigated the antitumor effect of solid lipid nanoparticles (SLN-DTX) when used in the treatment of metastatic breast tumors using 4T1-bearing BALB/c mice. Results Solid lipid nanoparticles (SLNs) were produced using the high-energy method. Compritol 888 ATO was selected as the lipid matrix, and Pluronic F127 and Span 80 as the surfactants to stabilize nanoparticle dispersion. The particles had high stability for at least 120 days. The SLNs’ dispersion size was 128 nm, their polydispersity index (PDI) was 0.2, and they showed a negative zeta potential. SLNs had high docetaxel (DTX) entrapment efficiency (86%), 2% of drug loading and showed a controlled drug-release profile. The half-maximal inhibitory concentration (IC50) of SLN-DTX against 4T1 cells was more than 100 times lower than that of free DTX after 24 h treatment. In the cellular uptake test, SLN-DTX was taken into the cells significantly more than free DTX. The accumulation in the G2-M phase was significantly higher in cells treated with SLN-DTX (73.7%) than in cells treated with free DTX (23.0%), which induced subsequent apoptosis. TEM analysis revealed that SLN-DTX internalization is mediated by endocytosis, and fluorescence microscopy showed DTX induced microtubule damage. In vivo studies showed that SLN-DTX compared to free docetaxel exhibited higher antitumor efficacy by reducing tumor volume (p
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