scholarly journals Bio-tribological behavior of articular cartilage based on biological morphology

2021 ◽  
Vol 32 (11) ◽  
Author(s):  
Xinyue Zhang ◽  
Yi Hu ◽  
Kai Chen ◽  
Dekun Zhang
Keyword(s):  
Articular Cartilage ◽  
Hip Joint ◽  
Friction Pair ◽  
Cartilage Damage ◽  
Life Quality ◽  
Contact Pair ◽  
Soft Contact ◽  
Cocrmo Alloy ◽  
Prosthesis Replacement

AbstractArtificial hemiarthroplasty is one of the effective methods for the treatment of hip joint diseases, but the wear failure of the interface between the hemi hip joint material and articular cartilage restricts the life of the prosthesis. Therefore, it is important to explore the damage mechanism between the interfaces to prolong the life of the prosthesis and improve the life quality of the prosthesis replacement. In this paper, the creep and bio-tribological properties of cartilage against PEEK, CoCrMo alloy, and ceramic were studied, and the tribological differences between “hard–soft” and “soft–soft” contact were analyzed based on biomorphology. The results showed that with the increase of time in vitro, the thickness of the cartilage membrane decreased, the surface damage was aggravated, and the anti-creep ability of cartilage was weakened. Second, the creep resistance of the soft–soft contact pair was better than that of the hard–soft contact pair. Also, the greater the load and the longer the wear time, the more serious the cartilage damage. Among the three friction pairs, the cartilage in PEEK/articular cartilage was the least damaged, followed by CoCrMo alloy/articular cartilage, and the most damage was found in ceramic/articular, indicating that the soft–soft friction pair inflicted the least damage to the cartilage.

scholarly journals Reprogrammed Synovial Fluid-Derived Mesenchymal Stem/Stromal Cells Acquire Enhanced Therapeutic Potential for Articular Cartilage Repair

Cartilage ◽  
2021 ◽  
pp. 194760352110408
Author(s):  
Brian E. Walczak ◽  
Hongli Jiao ◽  
Ming-Song Lee ◽  
Wan-Ju Li
Keyword(s):  
Animal Model ◽  
Articular Cartilage ◽  
Synovial Fluid ◽  
Cartilage Repair ◽  
Stromal Cells ◽  
Cartilage Damage ◽  
Cellular Reprogramming ◽  
Human Mscs ◽  
Articular Cartilage Repair

Objectives Functions of mesenchymal stem/stromal cells (MSCs) are affected by patient-dependent factors such as age and health condition. To tackle this problem, we used the cellular reprogramming technique to epigenetically alter human MSCs derived from the synovial fluid of joints with osteoarthritis (OA) to explore the potential of reprogrammed MSCs for repairing articular cartilage. Materials and Methods MSCs isolated from the synovial fluid of three patients’ OA knees (Pa-MSCs) were reprogrammed through overexpression of pluripotency factors and then induced for differentiation to establish reprogrammed MSC (Re-MSC) lines. We compared the in vitro growth characteristics, chondrogenesis for articular cartilage chondrocytes, and immunomodulatory capacity. We also evaluated the capability of Re-MSCs to repair articular cartilage damage in an animal model with spontaneous OA. Results Our results showed that Re-MSCs increased the in vitro proliferative capacity and improved chondrogenic differentiation toward articular cartilage-like chondrocyte phenotypes with increased THBS4 and SIX1 and decreased ALPL and COL10A1, compared to Pa-MSCs. In addition, Re-MSC-derived chondrocytes expressing elevated COL2A and COL2B were more mature than parental cell-derived ones. The enhancement in chondrogenesis of Re-MSC involves the upregulation of sonic hedgehog signaling. Moreover, Re-MSCs improved the repair of articular cartilage in an animal model of spontaneous OA. Conclusions Epigenetic reprogramming promotes MSCs harvested from OA patients to increase phenotypic characteristics and gain robust functions. In addition, Re-MSCs acquire an enhanced potential for articular cartilage repair. Our study here demonstrates that the reprogramming strategy provides a potential solution to the challenge of variation in MSC quality.

scholarly journals Infrapatellar Fat Pad-derived Mesenchymal Stem Cell-based Spheroids Enhance Their Therapeutic Efficacy to Reverse Synovitis and Fat Pad Fibrosis

2020 ◽  
Author(s):  
Dimitrios Kouroupis ◽  
Melissa A Willman ◽  
Thomas M Best ◽  
Lee D Kaplan ◽  
Diego Correa
Keyword(s):  
Articular Cartilage ◽  
Rat Model ◽  
Cartilage Damage ◽  
Infrapatellar Fat Pad ◽  
Molecular Response ◽  
Fat Pad ◽  
Transcriptional Profiles ◽  
3D Spheroids

Abstract Background: To investigate the in vitro and in vivo anti-inflammatory/anti-fibrotic capacity of IFP-MSC manufactured as 3D spheroids. According to our hypothesis, IFP-MSC do not require prior cell priming to acquire a robust immunomodulatory phenotype in vitro in order to efficiently reverse synovitis and IFP fibrosis and secondarily delay articular cartilage damage in vivo.Methods: Human IFP-MSC immunophenotype, tri-potentiality, and transcriptional profiles were assessed in 3D settings. Multiplex secretomes were assessed in IFP-MSC spheroids [Crude (non-immunoselected), CD146+ or CD146- immunoselected cells] and compared with 2D cultures with and without prior inflammatory/fibrotic cell priming. Functionally, immunopotency limiting human PBMCs proliferation and effect on stimulated synoviocytes with inflammation and fibrotic cues. Finally, spheroids were tested in vivo in a rat model of acute synovitis/fat pad fibrosis.Results: Spheroids enhanced IFP-MSC phenotypic, transcriptional and secretory immunomodulatory profiles compared to 2D cultures. Further, CD146+ IFP-MSC spheroids showed enhanced secretory and transcriptional profiles, however, not reflected in a superior capacity to suppress activated PBMC suggesting 3D environment sufficient to induce an immunomodulatory phenotype. Crude IFP-MSC spheroids modulated the molecular response of synoviocytes previously exposed to inflammatory cues. Therapeutically, IFP-MSC spheroids retained Substance P degradation potential in vivo, while effectively induced resolution of inflammation/fibrosis of synovium and fat pad, halting the articular cartilage degradation in a rat model of progressive synovitis, fat pad fibrosis and osteoarthritis.Conclusions: 3D spheroids confer IFP-MSC a reproducible and enhanced immunomodulatory effect in vitro and in vivo, circumventing the requirement of non-compliant cell priming or selection before administration, thus streamlining cell products manufacturing protocols.

scholarly journals Enhanced Biomechanical Properties of Polyvinyl Alcohol-Based Hybrid Scaffolds for Cartilage Tissue Engineering

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 730
Author(s):  
Silvia Barbon ◽  
Martina Contran ◽  
Elena Stocco ◽  
Silvia Todros ◽  
Veronica Macchi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Articular Cartilage ◽  
Polyvinyl Alcohol ◽  
Mechanical Performance ◽  
Cartilage Damage ◽  
Cartilage Tissue ◽  
Future Research ◽  
Creep Tests ◽  
Hybrid Scaffolds

Articular cartilage damage is a primary feature of osteoarthritis and other inflammatory joint diseases (i.e., rheumatoid arthritis). Repairing articular cartilage is highly challenging due to its avascular/aneural nature and low cellularity. To induce functional neocartilage formation, the tissue substitute must have mechanical properties which can adapt well to the loading conditions of the joint. Among the various biomaterials which may function as cartilage replacements, polyvinyl alcohol (PVA) hydrogels stand out for their high biocompatibility and tunable mechanical features. This review article describes and discusses the enrichment of PVA with natural materials (i.e., collagen, hyaluronic acid, hydroxyapatite, chitosan, alginate, extracellular matrix) ± synthetic additives (i.e., polyacrylic acid, poly-lactic-co-glycolic acid, poly(ethylene glycol) diacrylate, graphene oxide, bioactive glass) to produce cartilage substitutes with enhanced mechanical performance. PVA-based hybrid scaffolds have been investigated mainly by compression, tensile, friction, stress relaxation and creep tests, demonstrating increased stiffness and friction properties, and with cartilage-like viscoelastic behavior. In vitro and in vivo biocompatibility studies revealed positive outcomes but also many gaps yet to be addressed. Thus, recommendations for future research are proposed in order to prompt further progress in the fabrication of PVA-based hybrid scaffolds which increasingly match the biological and mechanical properties of native cartilage.

scholarly journals Infrapatellar fat pad-derived mesenchymal stem cell-based spheroids enhance their therapeutic efficacy to reverse synovitis and fat pad fibrosis

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dimitrios Kouroupis ◽  
Melissa A. Willman ◽  
Thomas M. Best ◽  
Lee D. Kaplan ◽  
Diego Correa
Keyword(s):  
Articular Cartilage ◽  
Rat Model ◽  
Cartilage Damage ◽  
Molecular Response ◽  
Fat Pad ◽  
Transcriptional Profiles ◽  
Anti Inflammatory ◽  
3D Spheroids

Abstract Background To investigate the in vitro and in vivo anti-inflammatory/anti-fibrotic capacity of IFP-MSC manufactured as 3D spheroids. Our hypothesis is that IFP-MSC do not require prior cell priming to acquire a robust immunomodulatory phenotype in vitro in order to efficiently reverse synovitis and IFP fibrosis, and secondarily delay articular cartilage damage in vivo. Methods Human IFP-MSC immunophenotype, tripotentiality, and transcriptional profiles were assessed in 3D settings. Multiplex secretomes were assessed in IFP-MSC spheroids [Crude (non-immunoselected), CD146+ or CD146− immunoselected cells] and compared with 2D cultures with and without prior inflammatory/fibrotic cell priming. Functionally, IFP-MSC spheroids were assessed for their immunopotency on human PBMC proliferation and their effect on stimulated synoviocytes with inflammation and fibrotic cues. The anti-inflammatory and anti-fibrotic spheroid properties were further evaluated in vivo in a rat model of acute synovitis/fat pad fibrosis. Results Spheroids enhanced IFP-MSC phenotypic, transcriptional, and secretory immunomodulatory profiles compared to 2D cultures. Further, CD146+ IFP-MSC spheroids showed enhanced secretory and transcriptional profiles; however, these attributes were not reflected in a superior capacity to suppress activated PBMC. This suggests that 3D culturing settings are sufficient to induce an enhanced immunomodulatory phenotype in both Crude and CD146-immunoselected IFP-MSC. Crude IFP-MSC spheroids modulated the molecular response of synoviocytes previously exposed to inflammatory cues. Therapeutically, IFP-MSC spheroids retained substance P degradation potential in vivo, while effectively inducing resolution of inflammation/fibrosis of the synovium and fat pad. Furthermore, their presence resulted in arrest of articular cartilage degradation in a rat model of progressive synovitis and fat pad fibrosis. Conclusions 3D spheroids confer IFP-MSC a reproducible and enhanced immunomodulatory effect in vitro and in vivo, circumventing the requirement of non-compliant cell priming or selection before administration and thereby streamlining cell products manufacturing protocols.

scholarly journals The Complexity of Joint Regeneration: How an Advanced Implant could Fail by Its In Vivo Proven Bone Component

10.36850/e3 ◽  
2021 ◽  
Author(s):  
Paweena Diloksumpan ◽  
Florencia Abinzano ◽  
Mylène de Ruijter ◽  
Anneloes Mensinga ◽  
Saskia Plomp ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Cartilage Damage ◽  
Clinical Signs ◽  
Cartilage Regeneration ◽  
Type Ii Collagen ◽  
Type Ii ◽  
Micro Computed Tomography ◽  
Bone Anchor

Articular cartilage damage is a major challenge in healthcare due to the lack of long-term repair options. There are several promising regenerative implant-based approaches for the treatment, but the fixation of the implant remains a significant challenge. This study evaluated the potential for repair of an osteochondral implant produced through a novel combined bioprinting-based chondral-bone integration, with and without cells, in an equine model. Implants consisted of a melt electrowritten polycaprolactone (PCL) framework for the chondral compartment, which was firmly integrated with a bone anchor. The bone anchor was produced by extrusion-based printing of a low-temperature setting bioceramic material that had been proven to be effective for osteo-regeneration in an orthotopic, non-load bearing and non-articular site in the same species in an earlier in vivo study. Articular cartilage-derived progenitor cells were seeded into the PCL framework and cultured for 28 days in vitro in the presence of bone morphogenetic protein-9 (BMP-9), resulting in the formation of abundant extracellular matrix rich in glycosaminoglycans (GAGs) and type II collagen. The constructs were implanted in the stifle joints of Shetland ponies with cell-free scaffolds as controls. Clinical signs were monitored, and progression of healing was observed non-invasively through radiographic examinations and quantitative gait analysis. Biochemical and histological analyses 6 months after implantation revealed minimal deposition of GAGs and type II collagen in the chondral compartment of the defect site for both types of implants. Quantitative micro-computed tomography showed collapse of the bone anchor with low volume of mineralized neo-bone formation in both groups. Histology confirmed that the PCL framework within the chondral compartment was still present. It was concluded that the collapse of the osteal anchor, resulting in loss of the mechanical support of the chondral compartment, strongly affected overall outcome, precluding evaluation of the influence of BMP-9 stimulated cells on in vivo cartilage regeneration.

scholarly journals A Comparison of the Capacity of Mesenchymal Stromal Cells for Cartilage Regeneration Depending on Collagen-Based Injectable Biomimetic Scaffold Type

Life ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 756
Author(s):  
Victor I. Sevastianov ◽  
Yulia B. Basok ◽  
Ludmila A. Kirsanova ◽  
Alexey M. Grigoriev ◽  
Alexandra D. Kirillova ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Experimental Model ◽  
Mesenchymal Stromal Cells ◽  
Cartilage Repair ◽  
Stromal Cells ◽  
Cartilage Damage ◽  
Cartilage Regeneration ◽  
Human Adipose Tissue ◽  
Rabbit Knee

Mesenchymal stromal cells (MSCs) have shown a high potential for cartilage repair. Collagen-based scaffolds are used to deliver and retain cells at the site of cartilage damage. The aim of the work was a comparative analysis of the capacity of the MSCs from human adipose tissue to differentiate into chondrocytes in vitro and to stimulate the regeneration of articular cartilage in an experimental model of rabbit knee osteoarthrosis when cultured on microheterogenic collagen-based hydrogel (MCH) and the microparticles of decellularized porcine articular cartilage (DPC). The morphology of samples was evaluated using scanning electron microscopy and histological staining methods. On the surface of the DPC, the cells were distributed more uniformly than on the MCH surface. On day 28, the cells cultured on the DPC produced glycosaminoglycans more intensely compared to the MCH with the synthesis of collagen type II. However, in the experimental model of osteoarthrosis, the stimulation of the cartilage regeneration was more effective when the MSCs were administered to the MCH carrier. The present study demonstrates the way to regulate the action of the MSCs in the area of cartilage regeneration: the MCH is more conducive to stimulating cartilage repair by the MSCs, while the DPC is an inducer for a formation of a cartilage-like tissue by the MSCs in vitro.

scholarly journals A Comparison of the Capacity of Mesenchymal Stromal Cells for Cartilage Regeneration Depending on Collagen-Based Injectable Biomimetic Scaffold Type

2021 ◽  
Author(s):  
Victor Sevastianov ◽  
Yulia Basok ◽  
Ludmila Kirsanova ◽  
Alexey Grigoriev ◽  
Alexandra Kirillova ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Experimental Model ◽  
Mesenchymal Stromal Cells ◽  
Cartilage Repair ◽  
Stromal Cells ◽  
Cartilage Damage ◽  
Cartilage Regeneration ◽  
Human Adipose Tissue ◽  
Rabbit Knee

Mesenchymal stromal cells (MSCs) have shown a high potential for cartilage repair. Collagen-based scaffolds are used to deliver and retain cells at the site of cartilage damage. The aim of the work was a comparative analysis of the capacity of the MSCs from human adipose tissue to differentiate into chondrocytes in vitro and to stimulate the regeneration of articular cartilage in an experimental model of rabbit knee osteoarthrosis when cultured on microheterogenic collagen-based hydrogel (МCH) and the microparticles of decellularized porcine articular cartilage (DPC). The morphology of samples was evaluated using scanning electron microscopy and histological staining methods. On the surface of the DPC, the cells were distributed more uniformly than on the MCH surface. On day 28, the cells cultured on the DPC produced glycosaminoglycans more intensely compared to the MCH with the synthesis of collagen type II. However, in the experimental model of osteoarthrosis, the stimulation of the cartilage regeneration was more effective when the MSCs were administered to the MCH carrier. The present study demonstrates the way to regulate the action of the MSCs in the area of cartilage regeneration: the MCH is more conducive to stimulating cartilage repair by the MSCs, while the DPC is an inducer for a formation of a cartilage-like tissue by the MSCs in vitro.

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