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A design-of-experiments strategy for engineering 3D topographical features in osteosarcoma modelling.
Kozim Midkhatov1, George Taylor2, Lee Stevens3
1Division of Cell Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK.
Materials Today. Bio
|November 19, 2025
Summary
Engineered 3D microparticles mimic bone extracellular matrix topography to study osteosarcoma. These advanced models reveal how physical cues impact cancer cell behavior and chemotherapy response, improving preclinical research.
Area of Science:
- Biomaterials Science
- Cancer Biology
- Orthopedic Oncology
Background:
- Osteosarcoma is an aggressive bone cancer with poor outcomes due to limitations in current preclinical models.
- Conventional 2D cultures and animal models do not fully replicate the complex tumor microenvironment.
- Extracellular matrix (ECM) topography is a critical physical cue influencing cancer cell behavior.
Purpose of the Study:
- To investigate the impact of extracellular matrix (ECM) topographical features on osteosarcoma cell behavior and drug response.
- To develop and utilize a Design-of-Experiments (DoE) guided platform for creating bone-mimetic 3D microparticles.
- To evaluate how engineered surface topographies on 3D scaffolds affect osteosarcoma cell metabolism and sensitivity to doxorubicin.
Main Methods:
- Engineered polylactic acid-based microparticles with controlled stiffness and surface topographies (diameter, dimple size) using a DoE approach.
- Cultured osteosarcoma cell lines (MG-63, U2OS) on 2D and 3D microparticle scaffolds.
- Assessed cell metabolic activity, DNA content, and response to doxorubicin treatment.
- Analyzed metabolic pathway enrichment in 3D versus 2D cultures.
Main Results:
- 3D microparticle cultures, particularly those with heterogeneous dimples, showed significantly reduced metabolic activity and DNA content compared to 2D cultures.
- Chemotherapy response (doxorubicin) was primarily influenced by culture dimensionality (3D vs. 2D) rather than surface topography.
- 3D cultures exhibited altered metabolic profiles, including enriched amino acid pathways and downregulated ferroptosis signatures, compared to 2D cultures.
- Surface topography had subtle effects on lipid and nucleotide metabolism.
Conclusions:
- Topographically patterned 3D substrates can significantly influence osteosarcoma cell behavior, metabolism, and drug response.
- The 3D context is crucial for accurately modeling osteosarcoma, impacting chemotherapy sensitivity.
- The DoE-guided platform provides a systematic method for dissecting the role of ECM physical cues in osteosarcoma progression and therapeutic resistance.
