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Tarantino R, Jensen HM, Waldman SD. 13C Metabolic Flux Analysis in Chondrocytes Reveals a Novel Switch in Metabolic Phenotype. Tissue Eng Part A 2024. [PMID: 38368544 DOI: 10.1089/ten.tea.2023.0321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2024] Open
Abstract
Chondrocytes are typically known for their anaerobic metabolism both in vivo and under culture conditions in vitro. However, chondrocytes have been shown to display greater biosynthetic activity when subjected to conditions that elicit aerobic metabolism. We have previously shown that tissue formation by chondrocytes can be upregulated by controlling nutrient availability and that this response arises from changes in glucose metabolism. The aim of the present study was to further characterize these changes through 13C-metabolic flux analysis (13C-MFA), as well as to determine the most optimal response. Primary bovine chondrocytes were grown in scaffold-free high-density tissue culture. [U-13C] glucose labeling experiments were combined with a tissue-specific metabolic network model to carry out 13C-MFA under varying levels of nutrient availability. 13C-MFA results demonstrated that when subjected to increasing nutrient availability, chondrocytes switch from a predominately anaerobic to a mixed aerobic-anaerobic phenotype. This metabolic switch was attributed to the saturation of the lactate fermentation pathway and metabolite overflow toward the tricarboxylic acid cycle. This effect appears to be similar to, but the inverse of, the Crabtree effect ("inverse Crabtree effect"). The relationships between metabolic flux and nutrient availability were then utilized to identify culture conditions that promote enhanced tissue formation. This novel metabolic effect presents a simple but effective approach for enhancing the biosynthetic response of chondrocytes-a key requirement to develop functional engineered cartilaginous tissue for joint resurfacing.
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Affiliation(s)
- Roberto Tarantino
- Department of Chemical Engineering, Toronto Metropolitan University, Toronto, Canada
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
- Institute of Biomedical Engineering, Science and Technology (iBEST), Unity Health and Toronto Metropolitan University, Toronto, Canada
| | - Halie Mei Jensen
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
- Institute of Biomedical Engineering, Science and Technology (iBEST), Unity Health and Toronto Metropolitan University, Toronto, Canada
- Department of Electrical, Computer, and Biomedical Engineering, Toronto Metropolitan University, Toronto, Canada
| | - Stephen D Waldman
- Department of Chemical Engineering, Toronto Metropolitan University, Toronto, Canada
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
- Institute of Biomedical Engineering, Science and Technology (iBEST), Unity Health and Toronto Metropolitan University, Toronto, Canada
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Tarantino R, Chiu LLY, Weber JF, Yat Tse M, Bardana DD, Pang SC, Waldman SD. Effect of nutrient metabolism on cartilaginous tissue formation. Biotechnol Bioeng 2021; 118:4119-4128. [PMID: 34265075 DOI: 10.1002/bit.27888] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 06/25/2021] [Accepted: 07/09/2021] [Indexed: 11/09/2022]
Abstract
A major shortcoming in cartilage tissue engineering is the low biosynthetic response of chondrocytes. While different strategies have been investigated, a novel approach may be to control nutrient metabolism. Although known for their anaerobic metabolism, chondrocytes are more synthetically active under conditions that elicit mixed aerobic-anaerobic metabolism. Here, we postulate this metabolic switch induces HIF-1α signaling resulting in improved growth. Transition to different metabolic states can result in the pooling of metabolites, several of which can stabilize HIF-1α by interfering with PHD2. Chondrocytes cultured under increased media availability accelerated tissue deposition with the greatest effect occurring at 2 ml/106 cells. Under higher media availability, metabolism switched from anaerobic to mixed aerobic-anaerobic. Around this transition, maximal changes in PHD2 activity, HIF-1α expression, and HIF-1 target gene expression were observed. Loss-of-function studies using YC-1 confirmed the involvement of HIF-1. Lastly, targeted metabolomic studies revealed that intracellular lactate and succinate correlated with PHD2 activity. This study demonstrates that cartilaginous tissue formation can be regulated by nutrient metabolism and that this response is mediated through changes in HIF-1α signaling. By harnessing this newly identified metabolic switch, engineered cartilage implants may be developed without the need for sophisticated methods which could aid translation to the clinic.
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Affiliation(s)
- Roberto Tarantino
- Department of Chemical Engineering, Ryerson University, Toronto, Ontario, Canada.,Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Loraine L Y Chiu
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Joanna F Weber
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Man Yat Tse
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Davide D Bardana
- Department of Surgery, Queen's University, Kingston, Ontario, Canada
| | - Stephen C Pang
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Stephen D Waldman
- Department of Chemical Engineering, Ryerson University, Toronto, Ontario, Canada.,Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
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Bajic A, Tarantino R, Chiu LLY, Duever T, Waldman SD. Optimization of culture media to enhance the growth of tissue engineered cartilage. Biotechnol Prog 2020; 36:e3017. [PMID: 32394623 DOI: 10.1002/btpr.3017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 04/28/2020] [Accepted: 05/07/2020] [Indexed: 11/11/2022]
Abstract
Tissue engineering is a promising option for cartilage repair. However, several hurdles still need to be overcome to develop functional tissue constructs suitable for implantation. One of the most common challenges is the general low capacity of chondrocytes to synthesize cartilage-specific extracellular matrix (ECM). While different approaches have been explored to improve the biosynthetic response of chondrocytes, several studies have demonstrated that the nutritional environment (e.g., glucose concentration and media volume) can have a profound effect on ECM synthesis. Thus, the purpose of this study was to optimize the formulation of cell culture media to upregulate the accumulation of cartilaginous ECM constituents (i.e., proteoglycans and collagen) by chondrocytes in 3D culture. Using response surface methodology, four different media factors (basal media, media volume, glucose, and glutamine) were first screened to determine optimal media formulations. Constructs were then cultured under candidate optimal media formulations for 4 weeks and analyzed for their biochemical and structural properties. Interestingly, the maximal accumulation of proteoglycans and collagen appeared to be elicited by different media formulations. Most notably, proteoglycan accumulation was favored by high volume, low glucose-containing DMEM/F12 (1:1) media whereas collagen accumulation was favored by high volume, high glucose-containing F12 media. While high glutamine-containing media elicited increased DNA content, glutamine concentration had no apparent effect on ECM accumulation. Therefore, optimizing the nutritional environment during chondrocyte culture appears to be a promising, straight-forward approach to improve cartilaginous tissue formation. Future work will investigate the combined effects of the nutritional environment and external stimuli.
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Affiliation(s)
- Andjela Bajic
- Biomedical Engineering, Ryerson University, Toronto, Ontario, Canada.,Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Roberto Tarantino
- Chemical Engineering, Ryerson University, Toronto, Ontario, Canada.,Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Loraine L Y Chiu
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Thomas Duever
- Chemical Engineering, Ryerson University, Toronto, Ontario, Canada
| | - Stephen D Waldman
- Biomedical Engineering, Ryerson University, Toronto, Ontario, Canada.,Chemical Engineering, Ryerson University, Toronto, Ontario, Canada.,Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
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Bergholt MS, St-Pierre JP, Offeddu GS, Parmar P, Albro MB, Puetzer J, Oyen M, Stevens MM. Raman Spectroscopy Reveals New Insights into the Zonal Organization of Native and Tissue-Engineered Articular Cartilage. ACS CENTRAL SCIENCE 2016; 2:885-895. [PMID: 28058277 PMCID: PMC5200931 DOI: 10.1021/acscentsci.6b00222] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Indexed: 05/17/2023]
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.
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Affiliation(s)
- Mads S. Bergholt
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
| | - Jean-Philippe St-Pierre
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
| | - Giovanni S. Offeddu
- Nanoscience
Centre, Department of Engineering, University
of Cambridge, Cambridge CB3 0FF, United Kingdom
| | - Paresh
A. Parmar
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
| | - Michael B. Albro
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
| | - Jennifer
L. Puetzer
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
| | - Michelle
L. Oyen
- Nanoscience
Centre, Department of Engineering, University
of Cambridge, Cambridge CB3 0FF, United Kingdom
| | - Molly M. Stevens
- Department
of Materials, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Bioengineering, Imperial College London, London SW7 2AZ, United Kingdom
- Institute
of Biomedical Engineering, Imperial College
London, London SW7 2AZ, United Kingdom
- E-mail:
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Surrao DC, Khan AA, McGregor AJ, Amsden BG, Waldman SD. Can Microcarrier-Expanded Chondrocytes Synthesize Cartilaginous TissueIn Vitro? Tissue Eng Part A 2011; 17:1959-67. [DOI: 10.1089/ten.tea.2010.0434] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- Denver C. Surrao
- Department of Chemical Engineering, Queen's University, Kingston, Ontario, Canada
- Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario, Canada
| | - Aasma A. Khan
- Department of Chemical Engineering, Queen's University, Kingston, Ontario, Canada
- Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario, Canada
| | - Aaron J. McGregor
- Department of Chemical Engineering, Queen's University, Kingston, Ontario, Canada
- Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario, Canada
| | - Brian G. Amsden
- Department of Chemical Engineering, Queen's University, Kingston, Ontario, Canada
- Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario, Canada
| | - Stephen D. Waldman
- Department of Chemical Engineering, Queen's University, Kingston, Ontario, Canada
- Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario, Canada
- Department of Mechanical and Materials Engineering, Queen's University, Kingston, Ontario, Canada
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Khan AA, Suits JMT, Kandel RA, Waldman SD. The effect of continuous culture on the growth and structure of tissue-engineered cartilage. Biotechnol Prog 2009; 25:508-15. [DOI: 10.1002/btpr.108] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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