Abstract
Magneto-plasmonic nanoparticles (MPNPs), such as solid gold (Au) or hollow gold (HG) coated superparamagnetic iron oxide (SPIO) nanoparticles (NPs), have attracted increasing attention for brain-targeted therapeutics. This is due to their supreme magnetic targeting capability, light-to-heat conversion efficiency, and biocompatibility. Though promising, their therapeutic efficiency is difficult to predict because of the complex absorption, distribution, metabolism, and excretion process and the intrinsic and extrinsic properties of the blood–brain barrier (BBB). This paper presents a modern physiologically based pharmacokinetic (PBPK) model to predict pharmacokinetic (PK) behaviors of brain-targeting MPNPs and investigate their morphology and surface function-dependent BBB crossing efficiency. This model quantifies intrinsic and extrinsic properties of PK parameters, including phagocytic cellular uptake rate and brain permeability. This model successfully predicts the biodistribution of functionalized Au-SPIO (18.42 ± 0.23 nm) and HG-SPIO (73.65 ± 1.46 nm) MPNPs in 8-week-old adult mice in a 16-h window after intraperitoneal (IP) injection. These predictions agree well with the experimental data with a low absolute average fold error (1.5381 for Au-SPIO and 1.1225 for HG-SPIO NPs). Interestingly, Au-SPIO MPNPs with thinner plasmonic layers result in higher magnetization levels and thus lead to more efficient BBB crossing. Static magnetic field stimulation could improve brain accumulation of IP-injected Au-SPIO and HG-SPIO NPs by up to 4.9% and 1.4%, respectively. Additionally, IP injection led to higher brain accumulation compared to intravenous injection. This modern PBPK model can guide MPNP design optimization for brain-specific therapeutics.
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The datasets generated and analyzed during the current work are available from the corresponding author upon reasonable request.
Notes
In this manuscript, all MPNPs are functionalized with PEG and insulin to promote blood half-life and brain permeability unless otherwise specified.
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Acknowledgements
The authors thank the Material Characterization Facility and the Elemental Analysis Laboratory at Texas A&M University for their help.
Funding
This work was kindly supported by the United States National Science Foundation (award # CMMI 1851635, Y.W.; award # ECCS 2021081, Y.W. and Y.L.). This work was also supported by the award R01GM110137 (J.-P.P.) from the US National Institute of General Medical Sciences.
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The manuscript was written through the contributions of all authors. Hanwen Hu, Muzhaozi Yuan, Jingfan Chen, Tianzhu Fan, and Tianhao Yan performed material preparation, characterization, and results analysis. In vitro cell work was performed by Nguyen Nguyen and Zhifeng Xiao. In vivo animal work was performed by Caitlin A Madison. Hanwen Hu and Muzhaozi Yuan prepared the initial draft of the manuscript. Ying Li, Shoshana Eitan, Hong-Cai Zhou, Jean-Philippe Pellois, and Ya Wang reviewed and revised previous manuscript versions. All authors have read and approved the final version of the manuscript.
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Hu, H., Yuan, M., Chen, J. et al. Pharmacokinetic modeling of solid and hollow gold-coated superparamagnetic iron oxide nanoparticles for brain-targeted therapeutics: prediction and experiment. Adv Compos Hybrid Mater 7, 76 (2024). https://doi.org/10.1007/s42114-024-00884-9
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DOI: https://doi.org/10.1007/s42114-024-00884-9