Lipidic Cubic-Phase Nanoparticles (Cubosomes) Loaded with Doxorubicin and Labeled with 177 Lu as a Potential Tool for Combined Chemo and Internal Radiotherapy for Cancers

Nanomaterials
Adrianna CytryniakAgnieszka Majkowska-Pilip

Abstract

Lipid liquid-crystalline nanoparticles (cubosomes) were used for the first time as a dual-modality drug delivery system for internal radiotherapy combined with chemotherapy. Monoolein (GMO)-based cubosomes were prepared by loading the anticancer drug, doxorubicin and a commonly used radionuclide, low-energy beta (β-)-emitter, 177Lu. The radionuclide was complexed with a long chain derivative of DOTAGA (DOTAGA-OA). The DOTAGA headgroup of the chelator was exposed to the aqueous channels of the cubosomes, while, concerning OA, the hydrophobic tail was embedded in the nonpolar region of the lipid bilayer matrix, placing the radioactive dopant in a stable manner inside the cubosome. The cubosomes containing doxorubicin and the radionuclide complex increased the cytotoxicity measured by the viability of the treated HeLa cells compared with the effect of single-drug cubosomes containing either the DOX DOTAGA-OA or DOTAGA-OA-177Lu complex. Multifunctional lipidic nanoparticles encapsulating the chemotherapeutic agent together with appropriately complexed (β-) radionuclide are proposed as a potential strategy for effective local therapy of various cancers.

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Methods Mentioned

BETA
X-ray
dynamic
transmission electron microscopy
NMR
dynamic light scattering
electron cryomicroscopy
Assay

Software Mentioned

Optiquant

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