Liver Tumor Spheroid Reconstitution for Testing Mitochondrial Targeted Magnetic Hyperthermia Treatment
Xuqi Peng1,2, Bingquan Wang3, Yu Yang4
1Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xuefu Street No. 1, Xi'an, 710127, China.
Abstract:
Mitochondria-targeting nanotherapy receives great attention these days for its capacity in disrupting mitochondria function and inducing tumor cell apoptosis through external magnetic and optical stimulations. However, the effect is significantly diminished when applied to animal models. The key factors include environmental complexity in vivo and intrinsic protective features of tumor tissues. To address these obstacles and reduce expenses on drug screening, we herein introduce a methodology for producing millimeter-sized spheroids with structural and functional characteristics of tumor tissues in vivo. The necessity of spheroid as a liver tumor model is demonstrated by comparing the effect of TPP-SPIONs (triphenylphosphonium cation-superparamagnetic iron oxide nanoparticles) on monolayer-cultured HepG2 cells and spheroids. Our study reveals that large-scale spheroid, in contrast to monolayer cells, reflects more in vivo tumor characters and is less responsive to TPP-SPIONs during magnetic hyperthermia treatment.
Insights
Mitochondria-targeting nanotherapy is less effective in vivo. Researchers developed a 3D liver tumor spheroid model that better mimics in vivo conditions, showing reduced responsiveness to magnetic hyperthermia treatment compared to 2D cell cultures.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Oncology
Background:
- Mitochondria-targeting nanotherapy shows promise for cancer treatment via magnetic or optical stimulation.
- In vivo efficacy is limited by complex tumor microenvironments and protective features.
- Current preclinical models do not fully replicate in vivo tumor complexity.
Purpose of the Study:
- To develop a 3D liver tumor spheroid model that recapitulates in vivo tumor characteristics.
- To evaluate the utility of this spheroid model for assessing nanotherapy efficacy.
- To compare the response of spheroids versus monolayer cells to mitochondria-targeting magnetic hyperthermia.
Main Methods:
- Production of millimeter-sized liver tumor spheroids mimicking in vivo structural and functional properties.
- Comparison of TPP-SPIONs (triphenylphosphonium cation-superparamagnetic iron oxide nanoparticles) treatment on monolayer HepG2 cells and spheroids.
- Assessment of magnetic hyperthermia treatment efficacy on both culture models.
Main Results:
- Liver tumor spheroids exhibit greater structural and functional similarity to in vivo tumors than monolayer cultures.
- Spheroids demonstrated significantly reduced responsiveness to TPP-SPIONs-mediated magnetic hyperthermia compared to monolayer cells.
- The 3D spheroid model provides a more realistic platform for evaluating nanomedicine efficacy.
Conclusions:
- 3D liver tumor spheroids offer a superior preclinical model for studying nanotherapy, including mitochondria-targeting agents.
- This model highlights the limitations of 2D cultures in predicting in vivo nanomedicine performance.
- The developed spheroid model can aid in more accurate drug screening and reduce research costs.
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