Copper sulfide-loaded microspheres for breast cancer theranostics

In this study, we prepared the multifunctional microspheres loading 131I-labeled hollow copper sulfide nanoparticles and paclitaxel (131I-HCuSNPs-MS-PTX) for imaging and therapeutics of orthopic W256/B breast tumor in rats. 18F-fluordeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) imaging detected that the expansion of the tumor volume was delayed (p < 0.05) following intra-tumoral (i.t.) injection with 131I-HCuSNPs-MS-PTX plus near-infrared (NIR) irradiation. The immunohistochemical analysis further confirmed the anti-tumor effect. The single photon emission computed tomography (SPECT)/photoacoustic imaging mediated by 131I-HCuSNPs-MS-PTX demonstrated that microspheres were mainly distributed in the tumors with a relatively low distribution in other organs. Our results revealed that 131I-HCuSNPs-MS-PTX offered combined photothermal, chemo- and radio-therapies, eliminating tumors at a relatively low dose, as well as SPECT/CT and photoacoustic imaging to monitor distribution of the injected agents non-invasively. The copper sulfide-loaded microspheres, 131I-HCuSNPs-MS-PTX, can serve as a versatile theranostic agent in breast cancer orthopic model. Key Words: Microspheres, Theranostics, Combination therapy, Single photon emission computed tomography/computed tomography (SPECT/CT), Photoacoustic imaging
Source: Journal of Nuclear Medicine - Category: Nuclear Medicine Authors: Tags: Basic Science Posters (Oncology) Source Type: research