Modulation of sirtuins during monolayer chondrocyte culture influences cartilage regeneration upon transfer to a 3D culture environment
This study examined the role of sirtuins in the regenerative potential of articular chondrocytes. Sirtuins (SIRT1-7) play a key role in regulating cartilage homeostasis. By inhibiting pro-inflammatory pathways responsible for cartilage degradation and promoting the expression of key matrix component...
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Published in | Frontiers in bioengineering and biotechnology Vol. 10; p. 971932 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
Frontiers Media S.A
06.12.2022
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Subjects | |
Online Access | Get full text |
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Summary: | This study examined the role of sirtuins in the regenerative potential of articular chondrocytes. Sirtuins (SIRT1-7) play a key role in regulating cartilage homeostasis. By inhibiting pro-inflammatory pathways responsible for cartilage degradation and promoting the expression of key matrix components, sirtuins have the potential to drive a favourable balance between anabolic and catabolic processes critical to regenerative medicine. When subjected to osmolarity and glucose concentrations representative of the
niche, freshly isolated bovine chondrocytes exhibited increases in
but not
gene expression. Replicating methods adopted for the
monolayer expansion of chondrocytes for cartilage regenerative therapies, we found that
gene expression declined during expansion. Manipulation of sirtuin activity during
expansion by supplementation with the SIRT1-specific activator SRT1720, nicotinamide mononucleotide, or the pan-sirtuin inhibitor nicotinamide, significantly influenced cartilage regeneration in subsequent 3D culture. Tissue mass, cellularity and extracellular matrix content were reduced in response to sirtuin inhibition during expansion, whilst sirtuin activation enhanced these measures of cartilage tissue regeneration. Modulation of sirtuin activity during monolayer expansion influenced H3K27me3, a heterochromatin mark with an important role in development and differentiation. Unexpectedly, treatment of primary chondrocytes with sirtuin activators in 3D culture reduced their matrix synthesis. Thus, modulating sirtuin activity during the
monolayer expansion phase may represent a distinct opportunity to enhance the outcome of cartilage regenerative medicine techniques. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Annunziata Mauro, University of Teramo, Italy Reviewed by: Ryan Michael Porter, University of Arkansas for Medical Sciences, United States This article was submitted to Tissue Engineering and Regenerative Medicine, a section of the journal Frontiers in Bioengineering and Biotechnology Edited by: Anna Lange-Consiglio, University of Milan, Italy |
ISSN: | 2296-4185 2296-4185 |
DOI: | 10.3389/fbioe.2022.971932 |