International Journal of Nanomedicine (Dec 2021)
Templated Three-Dimensional Engineered Bone Matrix as a Model for Breast Cancer Osteolytic Bone Metastasis Process
Abstract
Manman Sun,1 Ke Huang,1 Xueshi Luo,2,3 Hong Li1 1Department of Materials Science and Engineering, College of Chemistry and Materials Science, Jinan University, Guangzhou, Guangdong, People’s Republic of China; 2The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong, People’s Republic of China; 3Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, Guangdong, People’s Republic of ChinaCorrespondence: Xueshi Luo; Hong Li Tel +86 020 85223062Fax +86 020 85223271Email [email protected]; [email protected]: Bone metastasis is one of the common causes of death relative to breast cancer. However, the evolvement of bone niche in cancer progression remains poorly understood. A three-dimensional (3D) engineered bone matrix was developed as an effective biomimetic model to explore the mechanism relative to bone cancer metastasis.Methods: In the study, a 3D engineered bone matrix was developed via cell biomineralization templated by a biomimetic collagen template. The process of bone metastasis relative to breast cancer was investigated by co-culturing breast cancer MDA-MB-231-GFP cells with pre-osteogenic MC3T3-E1 cells on the 3D bone matrix.Results: A typical bone matrix was obtained, where mineralized collagen fibers were packed into the bundle to form a 3D engineered bone matrix. As the cancer cells were invading along the way vertical to the alignment of mineralized collagen fiber, the bone matrix gradually became thinner, accompanied with the erosion of Col I and the loss of calcium and phosphorus. As a result, the disassembled structure of mineralized collagen fiber was observed, which may be attributed to osteolytic bone metastasis.Conclusion: An engineered 3D bone-like matrix was successfully prepared via cell mineralization, which can act as a model for bone metastasis process. The study revealed mineralized collagen fiber disassembled at nanoscale relative to breast cancer cells.Keywords: biomimetic models, breast cancer, MDA-MB-231-GFP cells, bone metastasis
