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Templated Three-Dimensional Engineered Bone Matrix as a Model for Breast Cancer Osteolytic Bone Metastasis Process
Manman Sun1, Ke Huang1, Xueshi Luo2,3
1Department of Materials Science and Engineering, College of Chemistry and Materials Science, Jinan University, Guangzhou, Guangdong, People's Republic of China.
International Journal of Nanomedicine
|January 10, 2022
Summary
Researchers developed a 3D engineered bone matrix to model breast cancer metastasis. This biomimetic model revealed that cancer cells disassemble mineralized collagen fibers, contributing to osteolytic bone metastasis.
Area of Science:
- Biomaterials Science
- Cancer Biology
- Orthopedic Research
Background:
- Bone metastasis is a significant cause of mortality in breast cancer patients.
- The intricate mechanisms of bone niche involvement in cancer progression are not fully understood.
Purpose of the Study:
- To develop a three-dimensional (3D) engineered bone matrix as a biomimetic model.
- To investigate the mechanisms underlying breast cancer bone metastasis.
Main Methods:
- Fabrication of a 3D engineered bone matrix using cell biomineralization and a collagen template.
- Co-culturing breast cancer cells (MDA-MB-231-GFP) with pre-osteogenic cells (MC3T3-E1) on the 3D matrix.
Main Results:
- A functional 3D engineered bone matrix was successfully created.
- Breast cancer cells invaded the matrix, causing thinning, collagen I erosion, and loss of calcium and phosphorus.
- Disassembly of mineralized collagen fibers at the nanoscale was observed, indicative of osteolytic bone metastasis.
Conclusions:
- An engineered 3D bone-like matrix was successfully prepared via cell mineralization.
- This model effectively simulates the bone metastasis process.
- The study demonstrated nanoscale disassembly of mineralized collagen fibers by breast cancer cells.
