Abstract |
As therapies continue to increase the lifespan of patients with breast cancer, the incidence of brain metastases has steadily increased, affecting a significant number of patients with metastatic disease. However, a major barrier toward treating these lesions is the inability of therapeutics to penetrate into the central nervous system and accumulate within intracranial tumor sites. In this study, we designed a cell-penetrating gold nanoparticle platform to increase drug delivery to brain metastatic breast cancer cells. TAT peptide-modified gold nanoparticles carrying doxorubicin led to improved cytotoxicity toward two brain metastatic breast cancer cell lines with a decrease in the IC50 of at least 80% compared to free drug. Intravenous administration of these particles led to extensive accumulation of particles throughout diffuse intracranial metastatic microsatellites with cleaved caspase-3 activity corresponding to tumor foci. Furthermore, intratumoral administration of these particles improved survival in an intracranial MDA-MB-231-Br xenograft mouse model. Our results demonstrate the promising application of gold nanoparticles for improving drug delivery in the context of brain metastatic breast cancer.
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Authors | Ramin A Morshed, Megan E Muroski, Qing Dai, Michelle L Wegscheid, Brenda Auffinger, Dou Yu, Yu Han, Lingjiao Zhang, Meijing Wu, Yu Cheng, Maciej S Lesniak |
Journal | Molecular pharmaceutics
(Mol Pharm)
Vol. 13
Issue 6
Pg. 1843-54
(06 06 2016)
ISSN: 1543-8392 [Electronic] United States |
PMID | 27169484
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural)
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Chemical References |
- Cell-Penetrating Peptides
- Gold
- Doxorubicin
- Caspase 3
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Topics |
- Animals
- Brain
(drug effects, metabolism, pathology)
- Brain Neoplasms
(drug therapy, metabolism, pathology)
- Breast Neoplasms
(drug therapy, metabolism, pathology)
- Caspase 3
(metabolism)
- Cell Line, Tumor
- Cell-Penetrating Peptides
(administration & dosage, chemistry)
- Doxorubicin
(administration & dosage, chemistry)
- Drug Delivery Systems
(methods)
- Female
- Gold
(chemistry)
- Humans
- Metal Nanoparticles
(administration & dosage, chemistry)
- Mice
- Mice, Nude
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