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Chen S, Wang Q, Eltit F, Guo Y, Cox M, Wang R. An Ammonia-Induced Calcium Phosphate Nanostructure: A Potential Assay for Studying Osteoporosis and Bone Metastasis. ACS APPLIED MATERIALS & INTERFACES 2021; 13:17207-17219. [PMID: 33845570 DOI: 10.1021/acsami.1c00495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Osteoclastic resorption of bones plays a central role in both osteoporosis and bone metastasis. A reliable in vitro assay that simulates osteoclastic resorption in vivo would significantly speed up the process of developing effective therapeutic solutions for those diseases. Here, we reported the development of a novel and robust nanostructured calcium phosphate coating with unique functions on the track-etched porous membrane by using an ammonia-induced mineralization (AiM) technique. The calcium phosphate coating uniformly covers one side of the PET membrane, enabling testing for osteoclastic resorption. The track-etched pores in the PET membrane allow calcium phosphate mineral pins to grow inside, which, on the one hand, enhances coating integration with a membrane substrate and, on the other hand, provides diffusion channels for delivering drugs from the lower chamber of a double-chamber cell culture system. The applications of the processed calcium phosphate coating were first demonstrated as a drug screening device by using alendronate, a widely used drug for osteoporosis. It was confirmed that the delivery of alendronate significantly decreased both the number of monocyte-differentiated osteoclasts and coating resorption. To demonstrate the application in studying bone metastasis, we delivered a PC3 prostate cancer-conditioned medium and confirmed that both the differentiation of monocytes into osteoclasts and the osteoclastic resorption of the calcium phosphate coating were significantly enhanced. This novel assay thus provides a new platform for studying osteoclastic activities and assessing drug efficacy in vitro.
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Affiliation(s)
- Sijia Chen
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Qiong Wang
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Felipe Eltit
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Yubin Guo
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Michael Cox
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Rizhi Wang
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
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