Improvement of the Chondrocyte-Specific Phenotype upon Equine Bone Marrow Mesenchymal Stem Cell Differentiation: Influence of Culture Time, Transforming Growth Factors and Type I Collagen siRNAs on the Differentiation Index.
Abstract: Articular cartilage is a tissue characterized by its poor intrinsic capacity for self-repair. This tissue is frequently altered upon trauma or in osteoarthritis (OA), a degenerative disease that is currently incurable. Similar musculoskeletal disorders also affect horses and OA incurs considerable economic loss for the equine sector. In the view to develop new therapies for humans and horses, significant progress in tissue engineering has led to the emergence of new generations of cartilage therapy. Matrix-associated autologous chondrocyte implantation is an advanced 3D cell-based therapy that holds promise for cartilage repair. This study aims to improve the autologous chondrocyte implantation technique by using equine mesenchymal stem cells (MSCs) from bone marrow differentiated into chondrocytes that can be implanted in the chondral lesion. The optimized protocol relies on culture under hypoxia within type I/III collagen sponges. Here, we explored three parameters that influence MSC differentiation: culture times, growth factors and RNA interference strategies. Our results suggest first that an increase in culture time from 14 to 28 or 42 days lead to a sharp increase in the expression of chondrocyte markers, notably type II collagen (especially the IIB isoform), along with a concomitant decrease in HtrA1 expression. Nevertheless, the expression of type I collagen also increased with longer culture times. Second, regarding the growth factor cocktail, TGF-β3 alone showed promising result but the previously tested association of BMP-2 and TGF-β1 better limits the expression of type I collagen. Third, RNA interference targeting as well as mRNA led to a more significant knockdown, compared with a conventional strategy targeting alone. This chondrogenic differentiation strategy showed a strong increase in the : mRNA ratio in the chondrocytes derived from equine bone marrow MSCs, this ratio being considered as an index of the functionality of cartilage. These data provide evidence of a more stable chondrocyte phenotype when combining and siRNAs associated to a longer culture time in the presence of BMP-2 and TGF-β1, opening new opportunities for preclinical trials in the horse. In addition, because the horse is an excellent model for human articular cartilage disorders, the equine therapeutic approach developed here can also serve as a preclinical step for human medicine.
Publication Date: 2018-02-01 PubMed ID: 29389887PubMed Central: PMC5855657DOI: 10.3390/ijms19020435Google Scholar: Lookup
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Summary
This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.
The research centers on improving methods for repairing cartilage damage, specifically in horses but also potentially in humans. The researchers focused on three parameters – culture time, growth factors, and RNA interference strategies – to optimize chondrocyte differentiation from equine mesenchymal stem cells, to be used in an advanced 3D cell-based therapy aimed at repairing cartilage.
Objective of the Study
- The main aim of the study was to devise a better method for repairing damaged articular cartilage, which currently has limited capacity for self-repair. The target of this research were equines suffering from osteoarthritis, due to the significant economic impact this condition has on the horse industry. Improvements found within this research could also be applied to humans suffering from similar conditions.
Research Design and Methods
- The researchers adapted the advanced 3D cell-based therapy called ‘matrix-associated autologous chondrocyte implantation’ for this study. The therapy uses mesenchymal stem cells (MSCs) from equine bone marrow, which are differentiated into chondrocytes and implanted into the cartilage lesion. The procedure was optimized under hypoxia within type I/III collagen sponges.
- Three parameters influencing MSC differentiation were explored: culture times, growth factors, and RNA interference strategies. The culture times tested were 14, 28 and 42 days. Positive impact was noted with an increase in culture times, with a marked increase in chondrocyte marker expression and a decrease in HtrA1 expression observed.
- For growth factors, TGF-β3 showed promising results, but the combination of BMP-2 and TGF-β1 was found to significantly limit the expression of type I collagen, suggesting a more optimal outcome.
- RNA interference targeting combination strategies led to a more impactful knockdown compared to using conventional strategies. This differentiation strategy resulted in a significant increase in the IIB:IIB mRNA ratio—an index of cartilage functionality—in the chondrocytes derived from the equine bone marrow MSCs.
Conclusion and Implications
- The research data suggested a more stable chondrocyte phenotype when longer culture times were combined with BMP-2 and TGF-β1, and when RNA interference strategies were utilized. This could open new opportunities for preclinical trials in equine subjects.
- As the horse is an effective model for studying human articular cartilage disorders, the therapeutic approaches developed and proven in the equine model could also serve as preclinical steps for human medicine, substantially benefiting the research and treatment of human articular cartilage disorders.
Cite This Article
APA
Branly T, Contentin R, Desancé M, Jacquel T, Bertoni L, Jacquet S, Mallein-Gerin F, Denoix JM, Audigié F, Demoor M, Galéra P.
(2018).
Improvement of the Chondrocyte-Specific Phenotype upon Equine Bone Marrow Mesenchymal Stem Cell Differentiation: Influence of Culture Time, Transforming Growth Factors and Type I Collagen siRNAs on the Differentiation Index.
Int J Mol Sci, 19(2), 435.
https://doi.org/10.3390/ijms19020435 Publication
Researcher Affiliations
- Normandie Univ, UNICAEN, BIOTARGEN, 14000 Caen, France. tbranly@gmail.com.
- Normandie Univ, UNICAEN, BIOTARGEN, 14000 Caen, France. romaincontentin@hotmail.fr.
- Normandie Univ, UNICAEN, BIOTARGEN, 14000 Caen, France. melanie359@hotmail.fr.
- Normandie Univ, UNICAEN, BIOTARGEN, 14000 Caen, France. jacquel.thibaud@gmail.com.
- Center of Imaging and Research on Locomotor Affections in Equines, Ecole Vétérinaire d'Alfort, Université Paris-Est, 14430 Goustranville, France. lelia.bertoni@vet-alfort.fr.
- Center of Imaging and Research on Locomotor Affections in Equines, Ecole Vétérinaire d'Alfort, Université Paris-Est, 14430 Goustranville, France. sandrine.jacquet@vet-alfort.fr.
- Institute for Biology and Chemistry of Proteins, CNRS, UMR 5305 Laboratory of Tissue Biology and Therapeutic Engineering, Université Claude Bernard-Lyon 1, Université de Lyon, 69367 Lyon CEDEX 07, France. f.mallein-gerin@ibcp.fr.
- Center of Imaging and Research on Locomotor Affections in Equines, Ecole Vétérinaire d'Alfort, Université Paris-Est, 14430 Goustranville, France.
- Center of Imaging and Research on Locomotor Affections in Equines, Ecole Vétérinaire d'Alfort, Université Paris-Est, 14430 Goustranville, France. fabrice.audigie@vet-alfort.fr.
- Normandie Univ, UNICAEN, BIOTARGEN, 14000 Caen, France. magali.demoor@unicaen.fr.
- Normandie Univ, UNICAEN, BIOTARGEN, 14000 Caen, France. philippe.galera@unicaen.fr.
MeSH Terms
- Animals
- Cell Culture Techniques / methods
- Cell Differentiation / genetics
- Cells, Cultured
- Chondrocytes / cytology
- Chondrocytes / metabolism
- Chondrogenesis / genetics
- Collagen Type I / genetics
- Horses
- Humans
- Mesenchymal Stem Cells / cytology
- Mesenchymal Stem Cells / metabolism
- Osteoarthritis / therapy
- Phenotype
- RNA Interference
- RNA, Small Interfering / genetics
- Tissue Engineering / methods
- Transforming Growth Factors / genetics
Conflict of Interest Statement
The authors declare no conflicts of interest.
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