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Updated: May 13, 2026
Heterotypic Three-dimensional In Vitro Modeling of Stromal-Epithelial Interactions During Ovarian Cancer Initiation and Progression
Published on: August 28, 2012
A three-dimensional microenvironment alters protein expression and chemosensitivity of epithelial ovarian cancer
Janet Myungjin Lee1, Paulette Mhawech-Fauceglia, Nathan Lee
1Department of Preventive Medicine, University of Southern California/Keck School of Medicine, Los Angeles, CA 90033, USA.
Abstract:
For many cancers, there is a real need for more effective therapies. Although many drugs show promising results in vitro, most fail to translate into an in vivo model system, and only ∼5% show anti-tumor activity in clinical trials. It remains a significant challenge to accurately replicate in vitro the complex in vivo microenvironment in which cancers thrive, but this will be key to increasing the success of translating novel therapies into clinical practice. Three-dimensional (3D) cell culture models may better mimic primary tumors in vivo than traditional two-dimensional (2D) cultures. Therefore, we established and characterized 3D in vitro models of 31 epithelial ovarian cancer (EOC) cell lines, compared their biological and molecular features with 2D cultures and primary tumors, and tested their efficacy as models for evaluating chemoresponse. When cultured in 3D using polyhydroxoethylamethacrylate-coated plastics, EOC lines formed multicellular aggregates that could be classified as 'large dense', 'large loose', and 'small', based on size, light permeability, and proportion of cells incorporated into the complex structures. Features of histological differentiation characteristic of primary tumors that were not present in 2D cultures were restored in 3D. For many cell lines, the transition from a 2D to 3D microenvironment induced changes in the expression of several biomarkers relevant to disease. Generally, EOC cell lines proliferated more slowly and were more chemoresistant in 3D compared with 2D culture. In summary, 3D models of EOCs better reflect the histological, biological, and molecular features of primary tumors than the same cells cultured using traditional 2D techniques; 3D in vitro models also exhibit different sensitivities to chemotherapeutic agents compared with 2D models, which may have a significant impact on the success of drug testing pipelines for EOC. These findings could also impact in vitro modeling approaches and drug development strategies for other solid tumor types.
Insights
Three-dimensional (3D) cell cultures better mimic ovarian cancer tumors than 2D models. These 3D models show improved histological features and altered chemoresponse, impacting drug development for epithelial ovarian cancer (EOC).
Area of Science:
- Oncology
- Biotechnology
- Cell Biology
Background:
- Developing effective cancer therapies is challenging, with many drugs failing to translate from in vitro to clinical success.
- Replicating the complex in vivo tumor microenvironment in vitro is crucial for improving drug development pipelines.
- Three-dimensional (3D) cell culture models offer a potential solution to better mimic in vivo conditions compared to traditional two-dimensional (2D) cultures.
Purpose of the Study:
- To establish and characterize 3D in vitro models for 31 epithelial ovarian cancer (EOC) cell lines.
- To compare the biological and molecular features of 3D EOC models with 2D cultures and primary tumors.
- To evaluate the efficacy of 3D EOC models in predicting chemoresponse.
Main Methods:
- Development of 3D in vitro models using polyhydroxoethylmethacrylate-coated plastics for 31 EOC cell lines.
- Classification of 3D multicellular aggregates based on size, light permeability, and cellular structure.
- Comparative analysis of histological differentiation, biomarker expression, proliferation rates, and chemoresistance between 2D and 3D cultures, and primary tumors.
Main Results:
- 3D EOC models restored histological differentiation features absent in 2D cultures.
- Transition to 3D culture induced changes in biomarker expression relevant to EOC.
- EOC cell lines in 3D culture exhibited slower proliferation and increased chemoresistance compared to 2D cultures.
Conclusions:
- 3D EOC models more accurately reflect the histological, biological, and molecular characteristics of primary tumors than 2D models.
- 3D in vitro models demonstrate differential sensitivities to chemotherapeutic agents, impacting drug testing efficacy for EOC.
- These findings suggest that 3D cell culture approaches could significantly improve drug development strategies for epithelial ovarian cancer and other solid tumors.
