Raman spectroscopy reveals new insights into the zonal organization of native and tissue-engineered articular cartilage
Date
2016-12-28
Authors
Bergholt, Mads S.
St-Pierre, Jean-Philippe
Offeddu, Giovanni S.
Parmar, Paresh A.
Albro, Michael B.
Puetzer, Jennifer L.
Oyen, Michelle L.
Stevens, Molly M.
Version
OA Version
Citation
Mads S Bergholt, Jean-Philippe St-Pierre, Giovanni S Offeddu, Paresh A Parmar, Michael B Albro, Jennifer L Puetzer, Michelle L Oyen, Molly M Stevens. 2016. "Raman Spectroscopy Reveals New Insights into the Zonal Organization of Native and Tissue-Engineered Articular Cartilage.." ACS Cent Sci, Volume 2, Issue 12, pp. 885 - 895.
Abstract
Tissue architecture is intimately linked with its functions, and loss of tissue organization is often associated with pathologies. The intricate depth-dependent extracellular matrix (ECM) arrangement in articular cartilage is critical to its biomechanical functions. In this study, we developed a Raman spectroscopic imaging approach to gain new insight into the depth-dependent arrangement of native and tissue-engineered articular cartilage using bovine tissues and cells. Our results revealed previously unreported tissue complexity into at least six zones above the tidemark based on a principal component analysis and k-means clustering analysis of the distribution and orientation of the main ECM components. Correlation of nanoindentation and Raman spectroscopic data suggested that the biomechanics across the tissue depth are influenced by ECM microstructure rather than composition. Further, Raman spectroscopy together with multivariate analysis revealed changes in the collagen, glycosaminoglycan, and water distributions in tissue-engineered constructs over time. These changes were assessed using simple metrics that promise to instruct efforts toward the regeneration of a broad range of tissues with native zonal complexity and functional performance.
Description
License
Copyright © 2016 American Chemical Society. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. Link to ACS Lic.: https://pubs.acs.org/page/policy/authorchoice_termsofuse.html