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Kupratis ME, Gonzalez U, Rahman A, Burris DL, Corbin EA, Price C. Exogenous Collagen Crosslinking is Highly Detrimental to Articular Cartilage Lubrication. J Biomech Eng 2024; 146:071001. [PMID: 38323667 PMCID: PMC11005859 DOI: 10.1115/1.4064663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 01/29/2024] [Accepted: 01/30/2024] [Indexed: 02/08/2024]
Abstract
Healthy articular cartilage is a remarkable bearing material optimized for near-frictionless joint articulation. Because its limited self-repair capacity renders it susceptible to osteoarthritis (OA), approaches to reinforce or rebuild degenerative cartilage are of significant interest. While exogenous collagen crosslinking (CXL) treatments improve cartilage's mechanical properties and increase its resistance to enzymatic degradation, their effects on cartilage lubrication remain less clear. Here, we examined how the collagen crosslinking agents genipin (GP) and glutaraldehyde (GTA) impact cartilage lubrication using the convergent stationary contact area (cSCA) configuration. Unlike classical configurations, the cSCA sustains biofidelic kinetic friction coefficients (μk) via superposition of interstitial and hydrodynamic pressurization (i.e., tribological rehydration). As expected, glutaraldehyde- and genipin-mediated CXL increased cartilage's tensile and compressive moduli. Although net tribological rehydration was retained after CXL, GP or GTA treatment drastically elevated μk. Both healthy and "OA-like" cartilage (generated via enzymatic digestion) sustained remarkably low μk in saline- (≤0.02) and synovial fluid-lubricated contacts (≤0.006). After CXL, μk increased up to 30-fold, reaching values associated with marked chondrocyte death in vitro. These results demonstrate that mechanical properties (i.e., stiffness) are necessary, but not sufficient, metrics of cartilage function. Furthermore, the marked impairment in lubrication suggests that CXL-mediated stiffening is ill-suited to cartilage preservation or joint resurfacing.
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Affiliation(s)
- Meghan E. Kupratis
- Biomedical Engineering, University of Delaware, Newark, DE 19713
- University of Delaware
| | - Uriel Gonzalez
- Biomedical Engineering, University of Delaware, Newark, DE 19713
- University of Delaware
| | - Atia Rahman
- Mechanical Engineering, University of Delaware, Newark, DE 19713
- University of Delaware
| | - David L. Burris
- Mechanical Engineering, University of Delaware, Newark, DE 19716
| | - Elise A. Corbin
- Biomedical Engineering, University of Delaware, Newark, DE 19713; Materials Science & Engineering, University of Delaware, Newark, DE 19716
- University of Delaware
| | - Christopher Price
- Biomedical Engineering, University of Delaware, Newark, DE 19713; Mechanical Engineering, University of Delaware, Newark, DE 19716
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2
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Kupratis ME, Rahman A, Burris DL, Corbin EA, Price C. Enzymatic digestion does not compromise sliding-mediated cartilage lubrication. Acta Biomater 2024; 178:196-207. [PMID: 38428511 DOI: 10.1016/j.actbio.2024.02.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 02/21/2024] [Accepted: 02/23/2024] [Indexed: 03/03/2024]
Abstract
Articular cartilage's remarkable low-friction properties are essential to joint function. In osteoarthritis (OA), cartilage degeneration (e.g., proteoglycan loss and collagen damage) decreases tissue modulus and increases permeability. Although these changes impair lubrication in fully depressurized and slowly slid cartilage, new evidence suggests such relationships may not hold under biofidelic sliding conditions more representative of those encountered in vivo. Our recent studies using the convergent stationary contact area (cSCA) configuration demonstrate that articulation (i.e., sliding) generates interfacial hydrodynamic pressures capable of replenishing cartilage interstitial fluid/pressure lost to compressive loading through a mechanism termed tribological rehydration. This fluid recovery sustains in vivo-like kinetic friction coefficients (µk<0.02 in PBS and <0.005 in synovial fluid) with little sensitivity to mechanical properties in healthy tissue. However, the tribomechanical function of compromised cartilage under biofidelic sliding conditions remains unknown. Here, we investigated the effects of OA-like changes in cartilage mechanical properties, modeled via enzymatic digestion of mature bovine cartilage, on its tribomechanical function during cSCA sliding. We found no differences in sliding-driven tribological rehydration behaviors or µk between naïve and digested cSCA cartilage (in PBS or synovial fluid). This suggests that OA-like cartilage retains sufficient functional properties to support naïve-like fluid recovery and lubrication under biofidelic sliding conditions. However, OA-like cartilage accumulated greater total tissue strains due to elevated strain accrual during initial load application. Together, these results suggest that elevated total tissue strains-as opposed to activity-mediated strains or friction-driven wear-might be the key biomechanical mediator of OA pathology in cartilage. STATEMENT OF SIGNIFICANCE: Osteoarthritis (OA) decreases cartilage's modulus and increases its permeability. While these changes compromise frictional performance in benchtop testing under low fluid load support (FLS) conditions, whether such observations hold under sliding conditions that better represent the joints' dynamic FLS conditions in vivo is unclear. Here, we leveraged biofidelic benchtop sliding experiments-that is, those mimicking joints' native sliding environment-to examine how OA-like changes in mechanical properties effect cartilage's natural lubrication. We found no differences in sliding-mediated fluid recovery or kinetic friction behaviors between naïve and OA-like cartilage. However, OA-like cartilage experienced greater strain accumulation during load application, suggesting that elevated tissue strains (not friction-driven wear) may be the primary biomechanical mediator of OA pathology.
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Affiliation(s)
| | - Atia Rahman
- Mechanical Engineering, University of Delaware, Newark, DE, USA
| | - David L Burris
- Mechanical Engineering, University of Delaware, Newark, DE, USA
| | - Elise A Corbin
- Biomedical Engineering, University of Delaware, Newark, DE, USA; Materials Science & Engineering, University of Delaware, Newark, DE, USA
| | - Christopher Price
- Biomedical Engineering, University of Delaware, Newark, DE, USA; Mechanical Engineering, University of Delaware, Newark, DE, USA.
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3
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Bonnevie ED, Scanzello CR, Mauck RL. Modulating mechanobiology as a therapeutic target for synovial fibrosis to restore joint lubrication. Osteoarthritis Cartilage 2024; 32:41-51. [PMID: 37866546 PMCID: PMC10880438 DOI: 10.1016/j.joca.2023.09.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 09/10/2023] [Accepted: 09/12/2023] [Indexed: 10/24/2023]
Abstract
OBJECTIVES Fibroses are disorders linked to persistence of myofibroblasts due to biochemical (e.g., Transforming growth factor-β) and biophysical cues (e.g., a stiff microenvironment). In the context of osteoarthritis, fibrotic changes in the joint-lining synovium have been linked with disease progression. The objective of this study was to probe synovial fibroblast mechanobiology and how essential functions (i.e., lubrication) are altered in fibrotic environments. DESIGN Both ex vivo and in vitro synovium models were assessed for fibrotic and lubrication biomarkers to better understand the role of mechanobiology and lubrication. Additionally, in vitro, work on small molecules targeting mechanobiology was assessed. RESULTS Our results indicated that modulating mechanobiology could rescue the fibrotic phenotype instigated by stiffening microenvironment that resulted in altered lubricant expression. A small molecule therapeutic, fasudil, blocked ROCK-mediated contractility and this inhibition of the fibrotic mechano-response of synovial fibroblasts restored proper lubrication function, providing insight into mechanisms of disease progression as well as a new avenue for therapeutic development. CONCLUSION This study identifies synovial fibrosis as a condition that potentially has joint-wide deficits through inhibiting lubrication. Additionally, modulating mechanobiology (i.e., ROCK-mediated contractility) may pose a potential target for small molecule therapies that can be delivered to the joint space. CLASSIFICATION Applied Biological Sciences.
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Affiliation(s)
- Edward D Bonnevie
- Translational Musculoskeletal Research Center, CMC VA Medical Center, United States; McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, United States.
| | - Carla R Scanzello
- Translational Musculoskeletal Research Center, CMC VA Medical Center, United States; Division of Rheumatology, Perelman School of Medicine, University of Pennsylvania, United States
| | - Robert L Mauck
- Translational Musculoskeletal Research Center, CMC VA Medical Center, United States; McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, United States; Department of Bioengineering, University of Pennsylvania, United States.
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4
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Seewald LA, Sabino IG, Montney KL, Delco ML. Synovial fluid mitochondrial DNA concentration reflects the degree of cartilage damage after naturally occurring articular injury. Osteoarthritis Cartilage 2023; 31:1056-1065. [PMID: 37028640 PMCID: PMC10524327 DOI: 10.1016/j.joca.2023.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 02/27/2023] [Accepted: 03/19/2023] [Indexed: 04/09/2023]
Abstract
OBJECTIVE To evaluate mitochondrial DNA (mtDNA) release from injured chondrocytes and investigate the utility of synovial fluid mtDNA concentration in early detection of posttraumatic osteoarthritis. METHOD We measured mtDNA release using four models of osteoarthritis: in vitro interleukin-1β stimulation of cultured equine chondrocytes, ex vivo mechanical impact of bovine cartilage explants, in vivo mechanical impact of equine articular cartilage, and naturally occurring equine intraarticular fracture. In our in vivo model, one group was treated with an intraarticular injection of the mitoprotective peptide SS-31 following cartilage injury. mtDNA content was quantified using qPCR. For naturally occurring cases of joint injury, clinical data (radiographs, arthroscopic video footage) were scored for criteria associated with degenerative joint disease. RESULTS Chondrocytes released mtDNA in the acute time frame following inflammatory and mechanical cellular stress in vitro. mtDNA was increased in equine synovial fluid following experimental and naturally occurring injury to the joint surface. In naturally occurring posttraumatic osteoarthritis, we found a strong positive correlation between the degree of cartilage damage and mtDNA concentration (r = 0.80, P = 0.0001). Finally, impact-induced mtDNA release was mitigated by mitoprotective treatment. CONCLUSION Changes in synovial fluid mtDNA occur following joint injury and correlate with the severity of cartilage damage. Mitoprotection mitigates increases in synovial fluid mtDNA suggesting that mtDNA release may reflect mitochondrial dysfunction. Further investigation of mtDNA as a potentially sensitive marker of early articular injury and response to mitoprotective therapy is warranted.
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Affiliation(s)
- L A Seewald
- College of Veterinary Medicine, Cornell University, Ithaca, NY, USA.
| | - I G Sabino
- College of Veterinary Medicine, Cornell University, Ithaca, NY, USA.
| | - K L Montney
- College of Veterinary Medicine, Cornell University, Ithaca, NY, USA.
| | - M L Delco
- College of Veterinary Medicine, Cornell University, Ithaca, NY, USA.
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Kroupa KR, Gangi LR, Zimmerman BK, Hung CT, Ateshian GA. Superficial zone chondrocytes can get compacted under physiological loading: A multiscale finite element analysis. Acta Biomater 2023; 163:248-258. [PMID: 36243365 PMCID: PMC10324087 DOI: 10.1016/j.actbio.2022.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 09/27/2022] [Accepted: 10/05/2022] [Indexed: 11/01/2022]
Abstract
Recent in vivo and in vitro studies have demonstrated that superficial zone (SZ) chondrocytes within articular layers of diarthrodial joints die under normal physiologic loading conditions. In order to further explore the implications of this observation in future investigations, we first needed to understand the mechanical environment of SZ chondrocytes that might cause them to die under physiological sliding contact conditions. In this study we performed a multiscale finite element analysis of articular contact to track the temporal evolution of a SZ chondrocyte's interstitial fluid pressure, hydraulic permeability, and volume under physiologic loading conditions. The effect of the pericellular matrix modulus and permeability was parametrically investigated. Results showed that SZ chondrocytes can lose ninety percent of their intracellular fluid after several hours of intermittent or continuous contact loading, resulting in a reduction of intracellular hydraulic permeability by more than three orders of magnitude. These findings are consistent with loss of cell viability due to the impediment of cellular metabolic pathways induced by the loss of fluid. They suggest that there is a simple mechanical explanation for the vulnerability of SZ chondrocytes to sustained physiological loading conditions. Future studies will focus on validating these specific findings experimentally. STATEMENT OF SIGNIFICANCE: As with any mechanical system, normal 'wear and tear' of cartilage tissue lining joints is expected. Yet incidences of osteoarthritis are uncommon in individuals younger than 45. This counter-intuitive observation suggests there must be an intrinsic repair mechanism compensating for this wear and tear over many decades of life. Recent experimental studies have shown superficial zone chondrocytes die under physiologic loading conditions, suggesting that this repair mechanism may involve cell replenishment. To better understand the mechanical environment of these cells, we performed a multiscale computational analysis of articular contact under loading. Results indicated that normal activities like walking or standing can induce significant loss of intracellular fluid volume, potentially hindering metabolic activity and fluid transport properties, and causing cell death.
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Affiliation(s)
- Kimberly R Kroupa
- Department of Mechanical Engineering, Columbia University, 500 West 120th Street, 220 S.W. Mudd, New York, NY 10027, USA
| | - Lianna R Gangi
- Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace, 1210 Amsterdam Avenue, New York, NY 10027, USA
| | - Brandon K Zimmerman
- Department of Mechanical Engineering, Columbia University, 500 West 120th Street, 220 S.W. Mudd, New York, NY 10027, USA
| | - Clark T Hung
- Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace, 1210 Amsterdam Avenue, New York, NY 10027, USA; Department of Orthopedic Surgery, Columbia University, 622 West 168th Street PH 11 - Center, New York, NY 10032, USA
| | - Gerard A Ateshian
- Department of Mechanical Engineering, Columbia University, 500 West 120th Street, 220 S.W. Mudd, New York, NY 10027, USA; Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace, 1210 Amsterdam Avenue, New York, NY 10027, USA.
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6
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Kim B, Bouklas N, Cohen I, Bonassar LJ. Instabilities induced by mechanical loading determine the viability of chondrocytes grown on porous scaffolds. J Biomech 2023; 152:111591. [PMID: 37088031 DOI: 10.1016/j.jbiomech.2023.111591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 02/08/2023] [Accepted: 04/11/2023] [Indexed: 04/25/2023]
Abstract
Tissue-engineered cartilage constructs have shown promise to treat focal cartilage defects in multiple clinical studies. Notably, products in clinical use or in late-stage clinical trials often utilize porous collagen scaffolds to provide mechanical support and attachment sites for chondrocytes. Under loading, both the local mechanical responses of collagen scaffolds and the corresponding cellular outcomes are poorly understood, despite their wide use. As such, the architecture of collagen scaffolds varies significantly among tissue-engineered cartilage products, but the effects of such architectures on construct mechanics and cell viability are not well understood. This study investigated the effects of local mechanical responses of collagen scaffolds on chondrocyte viability in tissue-engineered cartilage constructs. We utilized fast confocal microscopy combined with a strain mapping technique to analyze the architecture-dependent instabilities under quasi-static loading and subsequent chondrocyte death in honeycomb and sponge scaffolds. More specifically, we compared the isotropic and the orthotropic planes for each type of collagen scaffold. Under compression, both planes exhibited elastic, buckled, and densified deformation modes. In both loading directions, cell death was minimal in regions that experienced elastic deformation mode and a trend of increase in buckled mode. More interestingly, we saw a significant increase in cell death in densified mode. Overall, this study suggests that local instabilities are directly correlated to chondrocyte death in tissue-engineered cartilage constructs, highlighting the importance of understanding the architecture-dependent local mechanical responses under loading.
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Affiliation(s)
- Byumsu Kim
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, United States
| | - Nikolaos Bouklas
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, United States
| | - Itai Cohen
- Department of Physics, Cornell University, Ithaca, NY, United States
| | - Lawrence J Bonassar
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, United States; Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, United States.
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7
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Karami P, Stampoultzis T, Guo Y, Pioletti DP. A guide to preclinical evaluation of hydrogel-based devices for treatment of cartilage lesions. Acta Biomater 2023; 158:12-31. [PMID: 36638938 DOI: 10.1016/j.actbio.2023.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 12/19/2022] [Accepted: 01/05/2023] [Indexed: 01/12/2023]
Abstract
The drive to develop cartilage implants for the treatment of major defects in the musculoskeletal system has resulted in a major research thrust towards developing biomaterial devices for cartilage repair. Investigational devices for the restoration of articular cartilage are considered as significant risk materials by regulatory bodies and therefore proof of efficacy and safety prior to clinical testing represents a critical phase of the multidisciplinary effort to bridge the gap between bench and bedside. To date, review articles have thoroughly covered different scientific facets of cartilage engineering paradigm, but surprisingly, little attention has been given to the preclinical considerations revolving around the validation of a biomaterial implant. Considering hydrogel-based cartilage products as an example, the present review endeavors to provide a summary of the critical prerequisites that such devices should meet for cartilage repair, for successful implantation and subsequent preclinical validation prior to clinical trials. Considerations pertaining to the choice of appropriate animal model, characterization techniques for the quantitative and qualitative outcome measures, as well as concerns with respect to GLP practices are also extensively discussed. This article is not meant to provide a systematic review, but rather to introduce a device validation-based roadmap to the academic investigator, in anticipation of future healthcare commercialization. STATEMENT OF SIGNIFICANCE: There are significant challenges around translation of in vitro cartilage repair strategies to approved therapies. New biomaterial-based devices must undergo exhaustive investigations to ensure their safety and efficacy prior to clinical trials. These considerations are required to be applied from early developmental stages. Although there are numerous research works on cartilage devices and their in vivo evaluations, little attention has been given into the preclinical pathway and the corresponding approval processes. With a focus on hydrogel devices to concretely illustrate the preclinical path, this review paper intends to highlight the various considerations regarding the preclinical validation of hydrogel devices for cartilage repair, from regulatory considerations, to implantation strategies, device performance aspects and characterizations.
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Affiliation(s)
- Peyman Karami
- Laboratory of Biomechanical Orthopedics, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland
| | - Theofanis Stampoultzis
- Laboratory of Biomechanical Orthopedics, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland
| | - Yanheng Guo
- Laboratory of Biomechanical Orthopedics, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland
| | - Dominique P Pioletti
- Laboratory of Biomechanical Orthopedics, Institute of Bioengineering, School of Engineering, EPFL, Lausanne, Switzerland.
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Pellicore MJ, Gangi LR, Murphy LA, Lee AJ, Jacobsen T, Kenawy HM, Shah RP, Chahine NO, Ateshian GA, Hung CT. Toward defining the role of the synovium in mitigating normal articular cartilage wear and tear. J Biomech 2023; 148:111472. [PMID: 36753853 PMCID: PMC10295808 DOI: 10.1016/j.jbiomech.2023.111472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
Cartilage repair has been studied extensively in the context of injury and disease, but the joint's management of regular sub-injurious damage to cartilage, or 'wear and tear,' which occurs due to normal activity, is poorly understood. We hypothesize that this cartilage maintenance is mediated in part by cells derived from the synovium that migrate to the worn articular surface. Here, we demonstrate in vitro that the early steps required for such a process can occur. First, we show that under physiologic mechanical loads, chondrocyte death occurs in the cartilage superficial zone along with changes to the cartilage surface topography. Second, we show that synoviocytes are released from the synovial lining under physiologic loads and attach to worn cartilage. Third, we show that synoviocytes parachuted onto a simulated or native cartilage surface will modify their behavior. Specifically, we show that synoviocyte interactions with chondrocytes lead to changes in synoviocyte mechanosensitivity, and we demonstrate that cartilage-attached synoviocytes can express COL2A1, a hallmark of the chondrogenic phenotype. Our findings suggest that synoviocyte-mediated repair of cartilage 'wear and tear' as a component of joint homeostasis is feasible and is deserving of future study.
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Affiliation(s)
- Matthew J Pellicore
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Lianna R Gangi
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Lance A Murphy
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Andy J Lee
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Timothy Jacobsen
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Hagar M Kenawy
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Roshan P Shah
- Department of Orthopedic Surgery, Columbia University, New York, NY, USA
| | - Nadeen O Chahine
- Department of Biomedical Engineering, Columbia University, New York, NY, USA; Department of Orthopedic Surgery, Columbia University, New York, NY, USA
| | - Gerard A Ateshian
- Department of Orthopedic Surgery, Columbia University, New York, NY, USA; Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Clark T Hung
- Department of Biomedical Engineering, Columbia University, New York, NY, USA; Department of Orthopedic Surgery, Columbia University, New York, NY, USA.
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Kosonen JP, Eskelinen ASA, Orozco GA, Nieminen P, Anderson DD, Grodzinsky AJ, Korhonen RK, Tanska P. Injury-related cell death and proteoglycan loss in articular cartilage: Numerical model combining necrosis, reactive oxygen species, and inflammatory cytokines. PLoS Comput Biol 2023; 19:e1010337. [PMID: 36701279 PMCID: PMC9879441 DOI: 10.1371/journal.pcbi.1010337] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 12/06/2022] [Indexed: 01/27/2023] Open
Abstract
Osteoarthritis (OA) is a common musculoskeletal disease that leads to deterioration of articular cartilage, joint pain, and decreased quality of life. When OA develops after a joint injury, it is designated as post-traumatic OA (PTOA). The etiology of PTOA remains poorly understood, but it is known that proteoglycan (PG) loss, cell dysfunction, and cell death in cartilage are among the first signs of the disease. These processes, influenced by biomechanical and inflammatory stimuli, disturb the normal cell-regulated balance between tissue synthesis and degeneration. Previous computational mechanobiological models have not explicitly incorporated the cell-mediated degradation mechanisms triggered by an injury that eventually can lead to tissue-level compositional changes. Here, we developed a 2-D mechanobiological finite element model to predict necrosis, apoptosis following excessive production of reactive oxygen species (ROS), and inflammatory cytokine (interleukin-1)-driven apoptosis in cartilage explant. The resulting PG loss over 30 days was simulated. Biomechanically triggered PG degeneration, associated with cell necrosis, excessive ROS production, and cell apoptosis, was predicted to be localized near a lesion, while interleukin-1 diffusion-driven PG degeneration was manifested more globally. Interestingly, the model also showed proteolytic activity and PG biosynthesis closer to the levels of healthy tissue when pro-inflammatory cytokines were rapidly inhibited or cleared from the culture medium, leading to partial recovery of PG content. The numerical predictions of cell death and PG loss were supported by previous experimental findings. Furthermore, the simulated ROS and inflammation mechanisms had longer-lasting effects (over 3 days) on the PG content than localized necrosis. The mechanobiological model presented here may serve as a numerical tool for assessing early cartilage degeneration mechanisms and the efficacy of interventions to mitigate PTOA progression.
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Affiliation(s)
- Joonas P. Kosonen
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
- * E-mail:
| | | | - Gustavo A. Orozco
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
- Department of Biomedical Engineering, Lund University, Lund, Sweden
| | - Petteri Nieminen
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Donald D. Anderson
- Departments of Orthopedics & Rehabilitation and Biomedical Engineering, University of Iowa, Iowa City, Iowa, United States of America
| | - Alan J. Grodzinsky
- Departments of Biological Engineering, Electrical Engineering and Computer Science, and Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Rami K. Korhonen
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| | - Petri Tanska
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
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10
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Kim B, Bonassar LJ. Understanding the Influence of Local Physical Stimuli on Chondrocyte Behavior. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1402:31-44. [PMID: 37052844 DOI: 10.1007/978-3-031-25588-5_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Investigating the mechanobiology of chondrocytes is challenging due to the complex micromechanical environment of cartilage tissue. The innate zonal differences and poroelastic properties of the tissue combined with its heterogeneous composition create spatial- and temporal-dependent cell behavior, which further complicates the investigation. Despite the numerous challenges, understanding the mechanobiology of chondrocytes is crucial for developing strategies for treating cartilage related diseases as chondrocytes are the only cell type within the tissue. The effort to understand chondrocyte behavior under various mechanical stimuli has been ongoing over the last 50 years. Early studies examined global biosynthetic behavior under unidirectional mechanical stimulus. With the technological development in high-speed confocal imaging techniques, recent studies have focused on investigating real-time individual and collective cell responses to multiple / combined modes of mechanical stimuli. Such efforts have led to tremendous advances in understanding the influence of local physical stimuli on chondrocyte behavior. In addition, we highlight the wide variety of experimental techniques, spanning from static to impact loading, and analysis techniques, from biochemical assays to machine learning, that have been utilized to study chondrocyte behavior. Finally, we review the progression of hypotheses about chondrocyte mechanobiology and provide a perspective on the future outlook of chondrocyte mechanobiology.
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Affiliation(s)
- Byumsu Kim
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA
| | - Lawrence J Bonassar
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA.
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA.
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11
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An H, Liu Y, Yi J, Xie H, Li C, Wang X, Chai W. Research progress of cartilage lubrication and biomimetic cartilage lubrication materials. Front Bioeng Biotechnol 2022; 10:1012653. [PMID: 36267457 PMCID: PMC9576862 DOI: 10.3389/fbioe.2022.1012653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 09/20/2022] [Indexed: 11/16/2022] Open
Abstract
Human joints move thousands of times a day. The articular cartilage plays a vital role in joints’ protection. If there is dysfunction in cartilage lubrication, cartilage cannot maintain its normal function. Eventually, the dysfunction may bring about osteoarthritis (OA). Extensive researches have shown that fluid film lubrication, boundary lubrication, and hydration lubrication are three discovered lubrication models at cartilage surface, and analyzing and simulating the mechanism of cartilage lubrication are fundamental to the treatment of OA. This essay concludes recent researches on the progress of cartilage lubrication and biomimetic cartilage, revealing the pathophysiology of cartilage lubrication and updating bio-inspired cartilage lubrication applications.
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Affiliation(s)
- Haoming An
- Senior Department of Orthopedics, Fourth Medical Center of People’s Liberation Army General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
- National Clinical Research Center for Orthopaedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Yubo Liu
- Senior Department of Orthopedics, Fourth Medical Center of People’s Liberation Army General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
- National Clinical Research Center for Orthopaedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Jiafeng Yi
- Senior Department of Orthopedics, Fourth Medical Center of People’s Liberation Army General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
- National Clinical Research Center for Orthopaedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Hongbin Xie
- Senior Department of Orthopedics, Fourth Medical Center of People’s Liberation Army General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
- National Clinical Research Center for Orthopaedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Chao Li
- Senior Department of Orthopedics, Fourth Medical Center of People’s Liberation Army General Hospital, Beijing, China
- National Clinical Research Center for Orthopaedics, Sports Medicine and Rehabilitation, Beijing, China
- *Correspondence: Chao Li, ; Xing Wang, ; Wei Chai,
| | - Xing Wang
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
- The Institute of Chemistry of the Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China
- *Correspondence: Chao Li, ; Xing Wang, ; Wei Chai,
| | - Wei Chai
- Senior Department of Orthopedics, Fourth Medical Center of People’s Liberation Army General Hospital, Beijing, China
- National Clinical Research Center for Orthopaedics, Sports Medicine and Rehabilitation, Beijing, China
- *Correspondence: Chao Li, ; Xing Wang, ; Wei Chai,
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12
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Thomas MA, Fahey MJ, Pugliese BR, Irwin RM, Antonyak MA, Delco ML. Human mesenchymal stromal cells release functional mitochondria in extracellular vesicles. Front Bioeng Biotechnol 2022; 10:870193. [PMID: 36082164 PMCID: PMC9446449 DOI: 10.3389/fbioe.2022.870193] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 06/29/2022] [Indexed: 12/20/2022] Open
Abstract
Cartilage and other skeletal soft tissues heal poorly after injury, in part due to their lack of vascularity and low metabolic rate. No pharmacologic approaches have proven effective in preventing chronic degenerative disease after joint injury. Mesenchymal stromal cells (MSCs) have been investigated for their ability to treat pain associated with osteoarthritis (OA) and preserve articular cartilage. Limitations of MSCs include variability in cell phenotype, low engraftment and retention rates, and inconsistent clinical outcomes. Therefore, acellular biologic therapies such as extracellular vesicles (EVs) are currently being investigated. MSC-derived EVs have been found to replicate many of the therapeutic effects of their cells of origin, but the mechanisms driving this remain unclear. Recent evidence in non-orthopedic tissues suggests MSCs can rescue injured cells by donating mitochondria, restoring mitochondrial function in recipient cells, preserving cell viability, and promoting tissue repair. Our group hypothesized that MSCs package mitochondria for export into EVs, and that these so-called "mitoEVs" could provide a delivery strategy for cell-free mitochondria-targeted therapy. Therefore, the goals of this study were to: 1) characterize the vesicle fractions of the MSCs secretome with respect to mitochondrial cargoes, 2) determine if MSC-EVs contain functional mitochondria, and 3) determine if chondrocytes can take up MSC-derived mitoEVs. We isolated exosome, microvesicle, and vesicle-free fractions from MSC-conditioned media. Using a combination of dynamic light scattering and nanoparticle tracking, we determined that MSC-EV populations fall within the three size categories typically used to classify EVs (exosomes, microvesicles, apoptotic bodies). Fluorescent nanoparticle tracking, immunoblotting, and flow cytometry revealed that mitochondrial cargoes are abundant across all EV size populations, and mitoEVs are nearly ubiquitous among the largest EVs. Polarization staining indicated a subset of mitoEVs contain functional mitochondria. Finally, flow cytometry and fluorescent imaging confirmed uptake of mitoEVs by chondrocytes undergoing rotenone/antimycin-induced mitochondrial dysfunction. These data indicate that MSCs package intact, functional mitochondria into EVs, which can be transferred to chondrocytes in the absence of direct cell-cell interactions. This work suggests intercellular transfer of healthy MT to chondrocytes could represent a new, acellular approach to augment mitochondrial content and function in poorly-healing avascular skeletal soft tissues.
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Affiliation(s)
- Matthew A. Thomas
- Cornell University College of Veterinary Medicine, Department of Clinical Sciences, Ithaca, NY, United States
| | - Megan J. Fahey
- Cornell University College of Veterinary Medicine, Department of Clinical Sciences, Ithaca, NY, United States
| | - Brenna R. Pugliese
- Cornell University College of Veterinary Medicine, Department of Clinical Sciences, Ithaca, NY, United States
| | - Rebecca M. Irwin
- Cornell University College of Veterinary Medicine, Department of Clinical Sciences, Ithaca, NY, United States
| | - Marc A. Antonyak
- Cornell University College of Veterinary Medicine, Department of Molecular Medicine, Ithaca, NY, United States
| | - Michelle L. Delco
- Cornell University College of Veterinary Medicine, Department of Clinical Sciences, Ithaca, NY, United States
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13
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Porter A, Wang L, Han L, Lu XL. Bio-orthogonal Click Chemistry Methods to Evaluate the Metabolism of Inflammatory Challenged Cartilage after Traumatic Overloading. ACS Biomater Sci Eng 2022; 8:2564-2573. [PMID: 35561285 PMCID: PMC10461521 DOI: 10.1021/acsbiomaterials.2c00024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
During traumatic joint injuries, impact overloading can cause mechanical damage to the cartilage. In the following inflammation phase, excessive inflammatory cytokines (e.g., interleukin-1β (IL-1β)) can act on chondrocytes, causing over-proliferation, apoptosis, and extracellular matrix (ECM) degradation that can lead to osteoarthritis. This study investigated the combined effects of traumatic overloading and IL-1β challenge on the metabolic activities of chondrocytes. Bovine cartilage explants underwent impact overloading followed by IL-1β exposure at a physiologically relevant dosage (1 ng/mL). New click chemistry-based methods were developed to visualize and quantify the proliferation of in situ chondrocytes in a nondestructive manner without the involvement of histological sectioning or antibodies. Click chemistry-based methods were also employed to measure the ECM synthesis and degradation in cartilage explants. As the click reactions are copper-free and bio-orthogonal, i.e., with negligible cellular toxicity, cartilage ECM was cultured and studied for 6 weeks. Traumatic overloading induced significant cell death, mainly in the superficial zone. The high number of dead cells reduced the overall proliferation of chondrocytes as well as the synthesis of glycosaminoglycan (GAG) and collagen contents, but overloading alone had no effects on ECM degradation. IL-1β challenge had little effect on cell viability, proliferation, or protein synthesis but induced over 40% GAG loss in 10 days and 61% collagen loss in 6 weeks. For the overloaded samples, IL-1β induced greater degrees of degradation, with 68% GAG loss in 10 days and 80% collagen loss in 6 weeks. The results imply a necessary immediate ease of inflammation after joint injuries when trauma damage on cartilage is present. The new click chemistry methods could benefit many cellular and tissue engineering studies, providing convenient and sensitive assays of metabolic activities of cells in native three-dimensional (3D) environments.
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Affiliation(s)
- Annie Porter
- Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Liyun Wang
- Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Lin Han
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - X Lucas Lu
- Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716, United States
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14
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Yang DS, Dickerson EE, Zhang LX, Richendrfer H, Karamchedu PN, Badger GJ, Schmidt TA, Fredericks AM, Elsaid KA, Jay GD. Quadruped Gait and Regulation of Apoptotic Factors in Tibiofemoral Joints following Intra-Articular rhPRG4 Injection in Prg4 Null Mice. Int J Mol Sci 2022; 23:ijms23084245. [PMID: 35457064 PMCID: PMC9025840 DOI: 10.3390/ijms23084245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 04/06/2022] [Indexed: 12/03/2022] Open
Abstract
Camptodactyly-arthropathy-coxa vara-pericarditis (CACP) syndrome leads to diarthrodial joint arthropathy and is caused by the absence of lubricin (proteoglycan 4—PRG4), a surface-active mucinous glycoprotein responsible for lubricating articular cartilage. In this study, mice lacking the orthologous gene Prg4 served as a model that recapitulates the destructive arthrosis that involves biofouling of cartilage by serum proteins in lieu of Prg4. This study hypothesized that Prg4-deficient mice would demonstrate a quadruped gait change and decreased markers of mitochondrial dyscrasia, following intra-articular injection of both hindlimbs with recombinant human PRG4 (rhPRG4). Prg4−/− (N = 44) mice of both sexes were injected with rhPRG4 and gait alterations were studied at post-injection day 3 and 6, before joints were harvested for immunohistochemistry for caspase-3 activation. Increased stance and propulsion was shown at 3 days post-injection in male mice. There were significantly fewer caspase-3-positive chondrocytes in tibiofemoral cartilage from rhPRG4-injected mice. The mitochondrial gene Mt-tn, and myosin heavy (Myh7) and light chains (Myl2 and Myl3), known to play a cytoskeletal stabilizing role, were significantly upregulated in both sexes (RNA-Seq) following IA rhPRG4. Chondrocyte mitochondrial dyscrasias attributable to the arthrosis in CACP may be mitigated by IA rhPRG4. In a supporting in vitro crystal microbalance experiment, molecular fouling by albumin did not block the surface activity of rhPRG4.
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Affiliation(s)
- Daniel S. Yang
- School of Engineering, Brown University, Providence, RI 02912, USA; (D.S.Y.); (G.D.J.)
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
| | - Edward E. Dickerson
- North Carolina Agricultural Technical State University, Greensboro, NC 27411, USA;
| | - Ling X. Zhang
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
| | - Holly Richendrfer
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
| | - Padmini N. Karamchedu
- Department of Orthopedics, Alpert School of Medicine, Brown University, Providence, RI 02903, USA;
| | - Gary J. Badger
- Department of Medical Biostatistics, Larner College of Medicine, University of Vermont, Burlington, VT 05405, USA;
| | - Tannin A. Schmidt
- Department of Biomedical Engineering, School of Dental Medicine, University of Connecticut Health, Farmington, CT 06030, USA;
| | - Alger M. Fredericks
- Department of Surgery, Alpert School of Medicine, Brown University, Providence, RI 02903, USA;
| | - Khaled A. Elsaid
- School of Pharmacy, Chapman University, Irvine, CA 92618, USA
- Correspondence:
| | - Gregory D. Jay
- School of Engineering, Brown University, Providence, RI 02912, USA; (D.S.Y.); (G.D.J.)
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
- Department of Orthopedics, Alpert School of Medicine, Brown University, Providence, RI 02903, USA;
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15
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Boos MA, Lamandé SR, Stok KS. Multiscale Strain Transfer in Cartilage. Front Cell Dev Biol 2022; 10:795522. [PMID: 35186920 PMCID: PMC8855033 DOI: 10.3389/fcell.2022.795522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 01/19/2022] [Indexed: 11/30/2022] Open
Abstract
The transfer of stress and strain signals between the extracellular matrix (ECM) and cells is crucial for biochemical and biomechanical cues that are required for tissue morphogenesis, differentiation, growth, and homeostasis. In cartilage tissue, the heterogeneity in spatial variation of ECM molecules leads to a depth-dependent non-uniform strain transfer and alters the magnitude of forces sensed by cells in articular and fibrocartilage, influencing chondrocyte metabolism and biochemical response. It is not fully established how these nonuniform forces ultimately influence cartilage health, maintenance, and integrity. To comprehend tissue remodelling in health and disease, it is fundamental to investigate how these forces, the ECM, and cells interrelate. However, not much is known about the relationship between applied mechanical stimulus and resulting spatial variations in magnitude and sense of mechanical stimuli within the chondrocyte’s microenvironment. Investigating multiscale strain transfer and hierarchical structure-function relationships in cartilage is key to unravelling how cells receive signals and how they are transformed into biosynthetic responses. Therefore, this article first reviews different cartilage types and chondrocyte mechanosensing. Following this, multiscale strain transfer through cartilage tissue and the involvement of individual ECM components are discussed. Finally, insights to further understand multiscale strain transfer in cartilage are outlined.
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Affiliation(s)
- Manuela A. Boos
- Department of Biomedical Engineering, The University of Melbourne, Parkville, VIC, Australia
| | - Shireen R. Lamandé
- Musculoskeletal Research, Murdoch Children’s Research Institute, Parkville, VIC, Australia
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - Kathryn S. Stok
- Department of Biomedical Engineering, The University of Melbourne, Parkville, VIC, Australia
- *Correspondence: Kathryn S. Stok,
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16
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Mechanosignalling in cartilage: an emerging target for the treatment of osteoarthritis. Nat Rev Rheumatol 2021; 18:67-84. [PMID: 34934171 DOI: 10.1038/s41584-021-00724-w] [Citation(s) in RCA: 102] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/18/2021] [Indexed: 12/12/2022]
Abstract
Mechanical stimuli have fundamental roles in articular cartilage during health and disease. Chondrocytes respond to the physical properties of the cartilage extracellular matrix (ECM) and the mechanical forces exerted on them during joint loading. In osteoarthritis (OA), catabolic processes degrade the functional ECM and the composition and viscoelastic properties of the ECM produced by chondrocytes are altered. The abnormal loading environment created by these alterations propagates cell dysfunction and inflammation. Chondrocytes sense their physical environment via an array of mechanosensitive receptors and channels that activate a complex network of downstream signalling pathways to regulate several cell processes central to OA pathology. Advances in understanding the complex roles of specific mechanosignalling mechanisms in healthy and OA cartilage have highlighted molecular processes that can be therapeutically targeted to interrupt pathological feedback loops. The potential for combining these mechanosignalling targets with the rapidly expanding field of smart mechanoresponsive biomaterials and delivery systems is an emerging paradigm in OA treatment. The continued advances in this field have the potential to enable restoration of healthy mechanical microenvironments and signalling through the development of precision therapeutics, mechanoregulated biomaterials and drug systems in the near future.
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17
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Gologorsky CJ, Middendorf JM, Cohen I, Bonassar LJ. Depth-dependent patterns in shear modulus of temporomandibular joint cartilage correspond to tissue structure and anatomic location. J Biomech 2021; 129:110815. [PMID: 34706301 DOI: 10.1016/j.jbiomech.2021.110815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 11/17/2022]
Abstract
To fully understand TMJ cartilage degeneration and appropriate repair mechanisms, it is critical to understand the native structure-mechanics relationships of TMJ cartilage and any local variation that may occur in the tissue. Here, we used confocal elastography and digital image correlation to measure the depth-dependent shear properties as well as the structural properties of TMJ cartilage at different anatomic locations on the condyle to identify depth-dependent changes in shear mechanics and structure. We found that samples at every anatomic location showed qualitatively similar shear modulus profiles as a function of depth. In every sample, four distinct zones of mechanical behavior were observed, with shear modulus values spanning 3-5 orders of magnitude across zones. However, quantitative characteristics of shear modulus profiles varied by anatomic location, particularly zone size and location, with the most significant variation in zonal width occurring in the fibrocartilage surface layer (zone 1). This anatomic variation suggests that different locations on the TMJ condyle may play unique mechanical roles in TMJ function. Furthermore, zones identified in the mechanical data corresponded on a sample-by-sample basis to zones identified in the structural data, indicating the known structural zones of TMJ cartilage may also play unique mechanical roles in TMJ function.
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Affiliation(s)
| | - Jill M Middendorf
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA
| | - Itai Cohen
- Department of Physics, Cornell University, Clark Hall C7, Ithaca, NY 14853, USA
| | - Lawrence J Bonassar
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA; Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA.
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18
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Li Y, Yuan Z, Yang H, Zhong H, Peng W, Xie R. Recent Advances in Understanding the Role of Cartilage Lubrication in Osteoarthritis. Molecules 2021; 26:6122. [PMID: 34684706 PMCID: PMC8540456 DOI: 10.3390/molecules26206122] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/04/2021] [Accepted: 10/06/2021] [Indexed: 01/15/2023] Open
Abstract
The remarkable lubrication properties of normal articular cartilage play an essential role in daily life, providing almost frictionless movements of joints. Alterations of cartilage surface or degradation of biomacromolecules within synovial fluid increase the wear and tear of the cartilage and hence determining the onset of the most common joint disease, osteoarthritis (OA). The irreversible and progressive degradation of articular cartilage is the hallmark of OA. Considering the absence of effective options to treat OA, the mechanosensitivity of chondrocytes has captured attention. As the only embedded cells in cartilage, the metabolism of chondrocytes is essential in maintaining homeostasis of cartilage, which triggers motivations to understand what is behind the low friction of cartilage and develop biolubrication-based strategies to postpone or even possibly heal OA. This review firstly focuses on the mechanism of cartilage lubrication, particularly on boundary lubrication. Then the mechanotransduction (especially shear stress) of chondrocytes is discussed. The following summarizes the recent development of cartilage-inspired biolubricants to highlight the correlation between cartilage lubrication and OA. One might expect that the restoration of cartilage lubrication at the early stage of OA could potentially promote the regeneration of cartilage and reverse its pathology to cure OA.
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Affiliation(s)
- Yumei Li
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China; (Y.L.); (H.Y.); (H.Z.)
- School of Basic Medicine, Gannan Medical University, Ganzhou 341000, China
| | - Zhongrun Yuan
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China;
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Hui Yang
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China; (Y.L.); (H.Y.); (H.Z.)
- Jiangxi Province Key Laboratory of Biomaterials and Biofabrication for Tissue Engineering, Gannan Medical University, Ganzhou 341000, China
- School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, China
| | - Haijian Zhong
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China; (Y.L.); (H.Y.); (H.Z.)
- Jiangxi Province Key Laboratory of Biomaterials and Biofabrication for Tissue Engineering, Gannan Medical University, Ganzhou 341000, China
- School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, China
| | - Weijie Peng
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China; (Y.L.); (H.Y.); (H.Z.)
- Jiangxi Province Key Laboratory of Biomaterials and Biofabrication for Tissue Engineering, Gannan Medical University, Ganzhou 341000, China
| | - Renjian Xie
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China; (Y.L.); (H.Y.); (H.Z.)
- Jiangxi Province Key Laboratory of Biomaterials and Biofabrication for Tissue Engineering, Gannan Medical University, Ganzhou 341000, China
- School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, China
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19
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Xie R, Yao H, Mao AS, Zhu Y, Qi D, Jia Y, Gao M, Chen Y, Wang L, Wang DA, Wang K, Liu S, Ren L, Mao C. Biomimetic cartilage-lubricating polymers regenerate cartilage in rats with early osteoarthritis. Nat Biomed Eng 2021; 5:1189-1201. [PMID: 34608279 DOI: 10.1038/s41551-021-00785-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 07/17/2021] [Indexed: 02/07/2023]
Abstract
The early stages of progressive degeneration of cartilage in articular joints are a hallmark of osteoarthritis. Healthy cartilage is lubricated by brush-like cartilage-binding nanofibres with a hyaluronan backbone and two key side chains (lubricin and lipid). Here, we show that hyaluronan backbones grafted with lubricin-like sulfonate-rich polymers or with lipid-like phosphocholine-rich polymers together enhance cartilage regeneration in a rat model of early osteoarthritis. These biomimetic brush-like nanofibres show a high affinity for cartilage proteins, form a lubrication layer on the cartilage surface and efficiently lubricate damaged human cartilage, lowering its friction coefficient to the low levels typical of native cartilage. Intra-articular injection of the two types of nanofibre into rats with surgically induced osteoarthritic joints led to cartilage regeneration and to the abrogation of osteoarthritis within 8 weeks. Biocompatible injectable lubricants that facilitate cartilage regeneration may offer a translational strategy for the treatment of early osteoarthritis.
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Affiliation(s)
- Renjian Xie
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China.,Guangdong Key Laboratory of Biomedical Engineering, South China University of Technology, Guangzhou, China
| | - Hang Yao
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China.,School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China
| | | | - Ye Zhu
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK, USA
| | - Dawei Qi
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China
| | - Yongguang Jia
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China
| | - Meng Gao
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China
| | - Yunhua Chen
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China
| | - Lin Wang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China
| | - Dong-An Wang
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong SAR, China
| | - Kun Wang
- Department of Joint Surgery, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Sa Liu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China. .,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China. .,Guangdong Key Laboratory of Biomedical Engineering, South China University of Technology, Guangzhou, China.
| | - Li Ren
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China. .,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China. .,Guangdong Key Laboratory of Biomedical Engineering, South China University of Technology, Guangzhou, China.
| | - Chuanbin Mao
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK, USA. .,School of Materials Science and Engineering, Zhejiang University, Hangzhou, China.
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20
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Ayala S, Delco ML, Fortier LA, Cohen I, Bonassar LJ. Cartilage articulation exacerbates chondrocyte damage and death after impact injury. J Orthop Res 2021; 39:2130-2140. [PMID: 33274781 PMCID: PMC8175450 DOI: 10.1002/jor.24936] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/21/2020] [Accepted: 12/01/2020] [Indexed: 02/04/2023]
Abstract
Posttraumatic osteoarthritis (PTOA) is typically initiated by momentary supraphysiologic shear and compressive forces delivered to articular cartilage during acute joint injury and develops through subsequent degradation of cartilage matrix components and tissue remodeling. PTOA affects 12% of the population who experience osteoarthritis and is attributed to over $3 billion dollars annually in healthcare costs. It is currently unknown whether articulation of the joint post-injury helps tissue healing or exacerbates cellular dysfunction and eventual death. We hypothesize that post-injury cartilage articulation will lead to increased cartilage damage. Our objective was to test this hypothesis by mimicking the mechanical environment of the joint during and post-injury and determining if subsequent joint articulation exacerbates damage produced by initial injury. We use a model of PTOA that combines impact injury and repetitive sliding with confocal microscopy to quantify and track chondrocyte viability, apoptosis, and mitochondrial depolarization in a depth-dependent manner. Cartilage explants were harvested from neonatal bovine knee joints and subjected to either rapid impact injury (17.34 ± 0.99 MPa, 21.6 ± 2.45 GPa/s), sliding (60 min at 1 mm/s, under 15% axial compression), or rapid impact injury followed by sliding. Explants were then bisected and fluorescently stained for cell viability, caspase activity (apoptosis), and mitochondria polarization. Results show that compared to either impact or sliding alone, explants that were both impacted and slid experienced higher magnitudes of damage spanning greater tissue depths.
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Affiliation(s)
- Steven Ayala
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY
| | - Michelle L. Delco
- Department of Clinical Sciences, Cornell University College of Veterinary Medicine, Ithaca, NY
| | - Lisa A. Fortier
- Department of Clinical Sciences, Cornell University College of Veterinary Medicine, Ithaca, NY
| | - Itai Cohen
- Department of Physics, Cornell University, Ithaca, NY
| | - Lawrence J. Bonassar
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY,Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY,Address Correspondence to: Lawrence J. Bonassar, PhD., Professor, Department of Biomedical Engineering, 149 Weill Hall, Cornell University, Ithaca, NY 14853, (607) 255-9381,
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21
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Jiang W, Liu H, Wan R, Wu Y, Shi Z, Huang W. Mechanisms linking mitochondrial mechanotransduction and chondrocyte biology in the pathogenesis of osteoarthritis. Ageing Res Rev 2021; 67:101315. [PMID: 33684550 DOI: 10.1016/j.arr.2021.101315] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 02/12/2021] [Accepted: 03/01/2021] [Indexed: 12/11/2022]
Abstract
Mechanical loading is essential for chondrocyte health. Chondrocytes can sense and respond to various extracellular mechanical signals through an integrated set of mechanisms. Recently, it has been found that mitochondria, acting as critical mechanotransducers, are at the intersection between extracellular mechanical signals and chondrocyte biology. Much attention has been focused on identifying how mechanical loading-induced mitochondrial dysfunction contributes to the pathogenesis of osteoarthritis. In contrast, little is known regarding the mechanisms underlying functional alterations in mitochondria induced by mechanical stimulation. In this review, we describe how chondrocytes perceive environmental mechanical signals. We discuss how mechanical load induces mitochondrial functional alterations and highlight the major unanswered questions in this field. We speculate that AMP-activated protein kinase (AMPK), a master regulator of energy homeostasis, may play an important role in coupling force transmission to mitochondrial health and intracellular biological responses.
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22
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Articular Cartilage Friction, Strain, and Viability Under Physiological to Pathological Benchtop Sliding Conditions. Cell Mol Bioeng 2021; 14:349-363. [PMID: 34295444 DOI: 10.1007/s12195-021-00671-2] [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: 01/21/2021] [Accepted: 04/06/2021] [Indexed: 10/21/2022] Open
Abstract
In vivo, articular cartilage is exceptionally resistant to wear, damage, and dysfunction. However, replicating cartilage's phenomenal in vivo tribomechanics (i.e., high fluid load support, low frictions and strains) and mechanobiology on the benchtop has been difficult, because classical testing approaches tend to minimize hydrodynamic contributors to tissue function. Our convergent stationary contact area (cSCA) configuration retains the ability for hydrodynamically-mediated processes to contribute to interstitial hydration recovery and tribomechanical function via 'tribological rehydration'. Using the cSCA, we investigated how in situ chondrocyte survival is impacted by the presence of tribological rehydration during the reciprocal sliding of a glass counterface against a compressively loaded equine cSCA cartilage explant. When tribological rehydration was compromised during testing, by slow-speed sliding, 'pathophysiological' tribomechanical environments and high surface cell death were observed. When tribological rehydration was preserved, by high-speed sliding, 'semi-physiological' sliding environments and suppressed cell death were realized. Inclusion of synovial fluid during testing fostered 'truly physiological' sliding outcomes consistent with the in vivo environment but had limited influence on cell death compared to high-speed sliding in PBS. Subsequently, path analysis identified friction as a primary driver of cell death, with strain an indirect driver, supporting the contention that articulation mediated rehydration can benefit both the biomechanical properties and biological homeostasis of cartilage. Supplementary Information The online version contains supplementary material available at 10.1007/s12195-021-00671-2.
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23
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Matheson AR, Sheehy EJ, Jay GD, Scott WM, O'Brien FJ, Schmidt TA. The role of synovial fluid constituents in the lubrication of collagen-glycosaminoglycan scaffolds for cartilage repair. J Mech Behav Biomed Mater 2021; 118:104445. [PMID: 33740688 DOI: 10.1016/j.jmbbm.2021.104445] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 02/15/2021] [Accepted: 03/02/2021] [Indexed: 11/18/2022]
Abstract
Extracellular matrix (ECM)-derived scaffolds have shown promise as tissue-engineered grafts for promoting cartilage repair. However, there has been a lack of focus on fine-tuning the frictional properties of scaffolds for cartilage tissue engineering as well as understanding their interactions with synovial fluid constituents. Proteoglycan-4 (PRG4) and hyaluronan (HA) are macromolecules within synovial fluid that play key roles as boundary mode lubricants during cartilage surface interactions. The overall objective of this study was to characterize the role PRG4 and HA play in the lubricating function of collagen-glycosaminoglycan (GAG) scaffolds for cartilage repair. As a first step towards this goal, we aimed to develop a suitable in vitro friction test to establish the boundary mode lubrication parameters for collagen-GAG scaffolds articulated against glass in a phosphate buffered saline (PBS) bath. Subsequently, we sought to leverage this system to determine the effect of physiological synovial fluid lubricants, PRG4 and HA, on the frictional properties of collagen-GAG scaffolds, with scaffolds hydrated in PBS and bovine synovial fluid (bSF) serving as negative and positive controls, respectively. At all compressive strains examined (ε = 0.1-0.5), fluid depressurization within hydrated collagen-GAG scaffolds was >99% complete at ½ minute. The coefficient of friction was stable at all compressive strains (ranging from a low 0.103 ± 0.010 at ε = 0.3 up to 0.121 ± 0.015 at ε = 0.4) and indicative of boundary-mode conditions. Immunohistochemistry demonstrated that PRG4 from recombinant human (rh) and bovine sources adsorbed to collagen-GAG scaffolds and the coefficient of friction for scaffolds immersed in rhPRG4 (0.067 ± 0.027) and normal bSF (0.056 ± 0.020) solution decreased compared to PBS (0.118 ± 0.21, both p < 0.05, at ε = 0.2). The ability of the adsorbed rhPRG4 to reduce friction on the scaffolds indicates that its incorporation within collagen-GAG biomaterials may enhance their lubricating ability as potential tissue-engineered cartilage replacements. To conclude, this study reports the development of an in vitro friction test capable of characterizing the coefficient of friction of ECM-derived scaffolds tested in a range of synovial fluid lubricants and demonstrates frictional properties as a potential design parameter for implants and materials for soft tissue replacement.
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Affiliation(s)
- Austyn R Matheson
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada
| | - Eamon J Sheehy
- Tissue Engineering Research Group (TERG), Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland; Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland; Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland
| | - Gregory D Jay
- Department of Emergency Medicine, Warren Alpert Medical School & School of Engineering, Brown University, Providence, RI, USA
| | - W Michael Scott
- Biomedical Engineering Graduate Program, University of Calgary, Calgary, AB, Canada; Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Fergal J O'Brien
- Tissue Engineering Research Group (TERG), Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland; Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland; Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland
| | - Tannin A Schmidt
- Biomedical Engineering Department, University of Connecticut Health Center, Farmington, CT, USA.
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Fu L, Li P, Li H, Gao C, Yang Z, Zhao T, Chen W, Liao Z, Peng Y, Cao F, Sui X, Liu S, Guo Q. The Application of Bioreactors for Cartilage Tissue Engineering: Advances, Limitations, and Future Perspectives. Stem Cells Int 2021; 2021:6621806. [PMID: 33542736 PMCID: PMC7843191 DOI: 10.1155/2021/6621806] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 12/30/2020] [Accepted: 01/11/2021] [Indexed: 12/16/2022] Open
Abstract
Tissue engineering (TE) has brought new hope for articular cartilage regeneration, as TE can provide structural and functional substitutes for native tissues. The basic elements of TE involve scaffolds, seeded cells, and biochemical and biomechanical stimuli. However, there are some limitations of TE; what most important is that static cell culture on scaffolds cannot simulate the physiological environment required for the development of natural cartilage. Recently, bioreactors have been used to simulate the physical and mechanical environment during the development of articular cartilage. This review aims to provide an overview of the concepts, categories, and applications of bioreactors for cartilage TE with emphasis on the design of various bioreactor systems.
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Affiliation(s)
- Liwei Fu
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Pinxue Li
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Hao Li
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Cangjian Gao
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Zhen Yang
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Tianyuan Zhao
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Wei Chen
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Zhiyao Liao
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Yu Peng
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Fuyang Cao
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
| | - Xiang Sui
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
| | - Shuyun Liu
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
| | - Quanyi Guo
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
- School of Medicine, Nankai University, Tianjin 300071, China
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25
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Benson JM, Kook C, Moore AC, Voinier S, Price C, Burris DL. Range-of-motion affects cartilage fluid load support: functional implications for prolonged inactivity. Osteoarthritis Cartilage 2021; 29:134-142. [PMID: 33227436 DOI: 10.1016/j.joca.2020.11.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 10/09/2020] [Accepted: 11/11/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Joint movements sustain cartilage fluid load support (FLS) through a combination of contact migration and periodic bath exposure. Although there have been suggestions that small involuntary movements may disrupt load-induced exudation during prolonged inactivity, theoretical studies have shown otherwise. This work used well-controlled explant measurements to experimentally test an existing hypothesis that the range-of-motion must exceed the contact length to sustain non-zero FLS. METHOD Smooth glass spheres (1.2-3.2 mm radius) were slid at 1.5 mm/s (Péclet number >100) against bovine osteochondral explants under varying normal loads (0.05-0.1 N) and migration lengths (0.05-7 mm) using a custom instrument. In situ deformation measurements were used to quantify FLS. RESULTS Non-zero FLS was maintained at migration lengths as small as 0.05 mm or <10% the typical contact diameter. FLS peaked when track lengths exceeded 10 times the contact diameter. For migration lengths below this threshold, FLS decreased with increased contact stress. CONCLUSIONS Migration lengths far smaller than the contact diameter can sustain non-zero FLS, which, from a clinical perspective, indicates that fidgeting and drifting can mitigate exudation and loss of FLS during prolonged sitting and standing. Nonetheless, FLS decreased monotonically with decreased migration length when migration lengths were less than 10 times the contact diameter. The results demonstrate: (1) potential biomechanical benefits from small movement (e.g., drifting and fidgeting); (2) the quantitative limits of those benefits; (3) and how loads, movement patterns, and mobility likely impact long term FLS.
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Affiliation(s)
- J M Benson
- Department of Biomedical Engineering, USA
| | - C Kook
- Department of Mechanical Engineering, University of Delaware, Newark, DE, USA
| | - A C Moore
- Department of Biomedical Engineering, USA
| | - S Voinier
- Department of Mechanical Engineering, University of Delaware, Newark, DE, USA
| | - C Price
- Department of Biomedical Engineering, USA
| | - D L Burris
- Department of Biomedical Engineering, USA; Department of Mechanical Engineering, University of Delaware, Newark, DE, USA.
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26
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Irwin RM, Gao T, Boys AJ, Ortved K, Cohen I, Bonassar LJ. Microscale strain mapping demonstrates the importance of interface slope in the mechanics of cartilage repair. J Biomech 2020; 114:110159. [PMID: 33310276 DOI: 10.1016/j.jbiomech.2020.110159] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 11/10/2020] [Accepted: 11/25/2020] [Indexed: 01/20/2023]
Abstract
Achieving lateral integration of articular cartilage repair tissue with surrounding native cartilage remains a clinical challenge. Histological and bulk mechanical studies have identified extracellular matrix components that correlate with superior failure strength, but it is unclear how local changes in geometry and composition at the repair interface affect tissue strains under physiologic loading. Here, we investigated the effects of local compositional and interface geometry on lateral cartilage repair integration by coupling microscale Raman spectroscopy and confocal elastography to measure tissue strains under compressive and shear loading. Histological integration assessments did not have significant relationships with interface strains under compressive loading (p > 0.083) and only the perimeter attachment score was trending towards statistical significance with the |Exy| strain tensor under shear loading (p = 0.050). Interface slope had a stronger correlation with local tissue strains under compressive and shear loading compared to compositional measures of GAG, collagen, or proteins (compressive loading |Eyy| tensor: R2 = 0.400 (interface slope), 0.005 (GAG), 0.024 (collagen), and 0.012 (protein); shear loading |Exy| tensor: R2 = 0.457 (interface slope), 0.003 (GAG), 0.006 (collagen), and 0.000 (total protein)). These data support surgical publications detailing the need for vertical walls when debriding chondral defects. Current histological integration assessments and local compositional measures were insufficient for identifying the variation in interface strains under compressive and shear loading. Thus, our data points to the importance of controlling interface geometry at the time of surgery, which has implications for cartilage repair integration and long-term healing.
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Affiliation(s)
- Rebecca M Irwin
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, United States
| | - Tianyu Gao
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, United States
| | - Alexander J Boys
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, United States
| | - Kyla Ortved
- Comparative Orthopaedics Laboratory, Cornell University, Ithaca, NY, United States(1)
| | - Itai Cohen
- Department of Physics, Cornell University, Ithaca, NY, United States
| | - Lawrence J Bonassar
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, United States; Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, United States.
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27
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Feeney E, Galesso D, Secchieri C, Oliviero F, Ramonda R, Bonassar LJ. Inflammatory and Noninflammatory Synovial Fluids Exhibit New and Distinct Tribological Endotypes. J Biomech Eng 2020; 142:1084761. [DOI: 10.1115/1.4047628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Indexed: 12/31/2022]
Abstract
Abstract
Inferior synovial lubrication is a hallmark of osteoarthritis (OA), and synovial fluid (SF) lubrication and composition are variable among OA patients. Hyaluronic acid (HA) viscosupplementation is a widely used therapy for improving SF viscoelasticity and lubrication, but it is unclear how the effectiveness of HA viscosupplements varies with arthritic endotype. The objective of this study was to investigate the effects of the HA viscosupplement, Hymovis®, on the lubricating properties of diseased SF from patients with noninflammatory OA and inflammatory arthritis (IA). The composition (cytokine, HA, and lubricin concentrations) of the SF was measured as well as the mechanical properties (rheology, tribology) of the SF alone and in a 1:1 mixture with the HA viscosupplement. Using rotational rheometry, no difference in SF viscosity was detected between disease types, and the addition of HA significantly increased all fluids' viscosities. In noninflammatory OA SF, friction coefficients followed a typical Stribeck pattern, and their magnitude was decreased by the addition of HA. While some of the IA SF also showed typical Stribeck behavior, a subset showed more erratic behavior with highly variable and larger friction coefficients. Interestingly, this aberrant behavior was not eliminated by the addition of HA, and it was associated with low concentrations of lubricin. Aberrant SF exhibited significantly lower effective viscosities compared to noninflammatory OA and IA SF with typical tribological behavior. Collectively, these results suggest that different endotypes of arthritis exist with respect to lubrication, which may impact the effectiveness of HA viscosupplements in reducing friction.
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Affiliation(s)
- Elizabeth Feeney
- Nancy and Peter Meinig School of Biomedical Engineering, Cornell University, Weill Hall 152 526 Campus Road, Ithaca, NY 14853
| | - Devis Galesso
- Fidia Farmaceutici S.p.A, Via Ponte della Fabbrica 3/A, Abano Terme, Padua 35031, Italy
| | - Cynthia Secchieri
- Fidia Farmaceutici S.p.A, Via Ponte della Fabbrica 3/A, Abano Terme, Padua 35031, Italy
| | - Francesca Oliviero
- Rheumatology Unit, Department of Medicine-DIMED, University of Padua, Via Giustiniani, 2, Padua 35128, Italy
| | - Roberta Ramonda
- Rheumatology Unit, Department of Medicine-DIMED, University of Padua, Via Giustiniani, 2, Padua 35128, Italy
| | - Lawrence J. Bonassar
- Nancy and Peter Meinig School of Biomedical Engineering, Cornell University, Weill Hall 152, 526 Campus Road, Ithaca, NY 14853; Sibley School of Mechanical and Aerospace Engineering, Cornell University, Weill Hall 149, 526 Campus Road, Ithaca, NY 14853
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28
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Eskelinen ASA, Tanska P, Florea C, Orozco GA, Julkunen P, Grodzinsky AJ, Korhonen RK. Mechanobiological model for simulation of injured cartilage degradation via pro-inflammatory cytokines and mechanical stimulus. PLoS Comput Biol 2020; 16:e1007998. [PMID: 32584809 PMCID: PMC7343184 DOI: 10.1371/journal.pcbi.1007998] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 07/08/2020] [Accepted: 05/28/2020] [Indexed: 01/12/2023] Open
Abstract
Post-traumatic osteoarthritis (PTOA) is associated with cartilage degradation, ultimately leading to disability and decrease of quality of life. Two key mechanisms have been suggested to occur in PTOA: tissue inflammation and abnormal biomechanical loading. Both mechanisms have been suggested to result in loss of cartilage proteoglycans, the source of tissue fixed charge density (FCD). In order to predict the simultaneous effect of these degrading mechanisms on FCD content, a computational model has been developed. We simulated spatial and temporal changes of FCD content in injured cartilage using a novel finite element model that incorporates (1) diffusion of the pro-inflammatory cytokine interleukin-1 into tissue, and (2) the effect of excessive levels of shear strain near chondral defects during physiologically relevant loading. Cytokine-induced biochemical cartilage explant degradation occurs near the sides, top, and lesion, consistent with the literature. In turn, biomechanically-driven FCD loss is predicted near the lesion, in accordance with experimental findings: regions near lesions showed significantly more FCD depletion compared to regions away from lesions (p<0.01). Combined biochemical and biomechanical degradation is found near the free surfaces and especially near the lesion, and the corresponding bulk FCD loss agrees with experiments. We suggest that the presence of lesions plays a role in cytokine diffusion-driven degradation, and also predisposes cartilage for further biomechanical degradation. Models considering both these cartilage degradation pathways concomitantly are promising in silico tools for predicting disease progression, recognizing lesions at high risk, simulating treatments, and ultimately optimizing treatments to postpone the development of PTOA. Post-traumatic osteoarthritis is a musculoskeletal disorder where inflammatory processes and abnormal joint loading predispose articular cartilage to degradation after a mechanical injury. Since inflamed and injured cartilage cannot be reversed back to healthy state, prevention of osteoarthritis progression is advisable, a prestigious goal where computational models could serve as tools. The current literature is short of computational models combining both biochemical and biomechanical aspects of osteoarthritis. Thus, here we implemented inflammation of living cartilage tissue followed by biochemical perturbations of tissue homeostasis and shear strain-induced biomechanical degradation in novel cell-to-tissue-level finite element models. The models presented in this paper and enriched by our experimental findings/previous literature provide profound new mechanobiological insights and predictions about cartilage degradation in injured and inflamed tissue under physiologically relevant mechanical loading. We suggest that mechanobiological computational models could be applied as in silico analysis tools that provide clinicians information of the personalized progression of post-traumatic osteoarthritis and decision-making guidance for treatment of the disease.
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Affiliation(s)
| | - Petri Tanska
- Department of Applied Physics, University of Eastern Finland, Finland
| | - Cristina Florea
- Department of Applied Physics, University of Eastern Finland, Finland
- Departments of Biological Engineering, Electrical Engineering and Computer Science and Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, United States of America
| | - Gustavo A. Orozco
- Department of Applied Physics, University of Eastern Finland, Finland
| | - Petro Julkunen
- Department of Applied Physics, University of Eastern Finland, Finland
- Department of Clinical Neurophysiology, Kuopio University Hospital, Finland
| | - Alan J. Grodzinsky
- Departments of Biological Engineering, Electrical Engineering and Computer Science and Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, United States of America
| | - Rami K. Korhonen
- Department of Applied Physics, University of Eastern Finland, Finland
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29
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Injection route affects intra-articular hyaluronic acid distribution and clinical outcome in viscosupplementation treatment for knee osteoarthritis: a combined cadaver study and randomized clinical trial. Drug Deliv Transl Res 2020; 11:279-291. [PMID: 32514702 DOI: 10.1007/s13346-020-00793-6] [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: 10/24/2022]
Abstract
The coverage of hyaluronic acid (HA) on the impaired cartilage should be the precondition to exert its beneficial effect on knee osteoarthritis (KOA) according to the pharmacological mechanism. However, the intra-articular distribution of HA might be correlated with the route of drug delivery. Forty-two cadaver knees with radiographic evidence of osteoarthritis were given anteromedial (AM) or medial midpatellar (MMP) injection of HA (molecular weight 600-1500 kD) followed by gait stimulation. Although 2.5 ml HA delivered through both routes failed to cover the entire cartilage, HA covered 96.12% cartilage of patellofemoral joint (PFJ) and 71.44% of medial femorotibial joint (FTJ) through MMP route, whereas mainly distributed into FTJ and posterior condyles through AM route. HA in the MMP group distributed more in PFJ than that in the AM group (P < 0.001), but no significant difference presented in medial FTJ (P = 0.084). The clinical efficacy was also associated with the route of drug delivery. One hundred patients with unilateral mild-to-moderate KOA were recruited and randomly assigned to receive five weekly HA injections with AM route (n = 50) or MMP route (n = 50). Patients in the MMP group obtained better improvement in WOMAC index total score, pain score, stiffness score, and Lequesne index total score over the entire follow-up period, as compared to patients in the AM group (all P < 0.01). More patients in the MMP group claimed pain relief (71.7%, P = 0.024) and felt satisfying (63.1%, P = 0.007) than in the AM group at the end of follow-up. Therefore, intra-articular HA injection through MMP route is recommended in treating mild-to-moderate KOA. Graphical Abstract .
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30
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Bartell LR, Fortier LA, Bonassar LJ, Szeto HH, Cohen I, Delco ML. Mitoprotective therapy prevents rapid, strain-dependent mitochondrial dysfunction after articular cartilage injury. J Orthop Res 2020; 38:1257-1267. [PMID: 31840828 PMCID: PMC7225065 DOI: 10.1002/jor.24567] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 12/12/2019] [Indexed: 02/04/2023]
Abstract
Posttraumatic osteoarthritis (PTOA) involves the mechanical and biological deterioration of articular cartilage that occurs following joint injury. PTOA is a growing problem in health care due to the lack of effective therapies combined with an aging population with high activity levels. Recently, acute mitochondrial dysfunction and altered cellular respiration have been associated with cartilage degeneration after injury. This finding is particularly important because recently developed mitoprotective drugs, including SS peptides, can preserve mitochondrial structure and function after acute injury in other tissues. It is not known, however, if cartilage injury induces rapid structural changes in mitochondria, to what degree mitochondrial dysfunction in cartilage depends on the mechanics of injury or the time frame over which such dysfunction develops. Similarly, it is unknown if SS-peptide treatment can preserve mitochondrial structure and function after cartilage injury. Here, we combined fast camera elastography, longitudinal fluorescence assays, and computer vision techniques to track the fates of thousands of individual cells. Our results show that impact induces mechanically dependent mitochondrial depolarization within a few minutes after injury. Electron microscopy revealed that impact causes rapid structural changes in mitochondria that are related to reduced mitochondrial function, namely, fission and loss of cristae structure. We found that SS-peptide treatment prior to impact protects the mitochondrial structure and preserves mitochondrial function at levels comparable with that of unimpacted control samples. Overall, this study reveals the vital role of mitochondria in mediating cartilage's peracute (within minutes) response to traumatic injury and demonstrates mitoprotection as a promising therapeutic strategy for injury-induced cartilage damage.
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Affiliation(s)
- Lena R. Bartell
- School of Applied & Engineering Physics, Cornell University, Ithaca, NY, United States of America
| | - Lisa A. Fortier
- Department of Clinical Sciences, Cornell University, Ithaca, NY, United States of America
| | - Lawrence J. Bonassar
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, United States of America,Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, United States of America
| | - Hazel H. Szeto
- Burke Medical Research Institute, White Plains, NY, United States of America
| | - Itai Cohen
- Department of Physics, Cornell University, Ithaca, NY, United States of America
| | - Michelle L. Delco
- Department of Clinical Sciences, Cornell University, Ithaca, NY, United States of America,Corresponding author: Michelle L. Delco, DVM, PhD, Veterinary Medical Center C2-001, 930 Campus Road, Cornell University, Ithaca, NY 14853, Phone: (607) 253-3100, Fax: (607) 253-3102,
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31
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Irwin R, Feeney E, Secchieri C, Galesso D, Cohen I, Oliviero F, Ramonda R, Bonassar L. Distinct tribological endotypes of pathological human synovial fluid reveal characteristic biomarkers and variation in efficacy of viscosupplementation at reducing local strains in articular cartilage. Osteoarthritis Cartilage 2020; 28:492-501. [PMID: 32105835 PMCID: PMC7707424 DOI: 10.1016/j.joca.2020.02.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 02/03/2020] [Accepted: 02/06/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Viscosupplementation has been used for decades to treat mild to moderate osteoarthritis, yet it is unknown if the lubricating function of different pathological synovial fluids (SF) vary, or if they respond differentially to viscosupplementation. The objectives of this study were to (i) evaluate the friction coefficients and induced shear strains in articular cartilage when lubricated with pathological SF, (ii) identify the effect of hyaluronic acid (HA) supplementation on friction coefficients and shear strains, and (iii) identify SF biomarkers that correlate with lubricating function. METHOD Human pathological SF was grouped by white blood cell count (inflammatory: >2000 cells/mm3, n = 6; non-inflammatory: <2000 cells/mm3, n = 6). Compositional analyses for lubricin and cytokines were performed. Friction coefficients and local tissue shear strain measurements were coupled using new, microscale rheological analyses by lubricating neonatal bovine cartilage explants with SF alone and in a 1:1 ratio with HA (Hymovis®). RESULTS Friction coefficients were not significantly different between the inflammatory and non-inflammatory pathologies (p = 0.09), and were poorly correlated with peak tissue strains at the cartilage articular surface (R2 = 0.34). A subset of inflammatory SF samples induced higher tissue strains, and HA supplementation was most effective at lowering friction and tissue strains in this inflammatory subset. Across all pathologies there were clear relationships between polymorphonuclear neutrophil (PMN), IL-8, and lubricin concentrations with cartilage tissue strains. CONCLUSION These results suggest that pathological SF is characterized by distinct tribological endotypes where SF lubricating behaviors are differentially modified by viscosupplementation and are identifiable by biomarkers.
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Affiliation(s)
- R.M. Irwin
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - E. Feeney
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | | | | | - I. Cohen
- Department of Physics, Cornell University, Ithaca, NY, USA
| | - F. Oliviero
- Rheumatology Unit, Department of Medicine-DIMED, University of Padua, Padua, Italy
| | - R. Ramonda
- Rheumatology Unit, Department of Medicine-DIMED, University of Padua, Padua, Italy
| | - L.J. Bonassar
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA,Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA,Address correspondence and reprint requests to: L.J. Bonassar, Department of Biomedical Engineering, Cornell University, 237 Tower Road, Ithaca, NY, 14853, USA. Tel.: 607-255-9381. (L.J. Bonassar)
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32
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Bonnevie ED, Bonassar LJ. A Century of Cartilage Tribology Research Is Informing Lubrication Therapies. J Biomech Eng 2020; 142:1072682. [DOI: 10.1115/1.4046045] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Indexed: 11/08/2022]
Abstract
AbstractArticular cartilage is one of the most unique materials found in nature. This tissue's ability to provide low friction and low wear over decades of constant use is not surpassed, as of yet, by any synthetic materials. Lubrication of the body's joints is essential to mammalian locomotion, but breakdown and degeneration of cartilage is the leading cause of severe disability in the industrialized world. In this paper, we review how theories of cartilage lubrication have evolved over the past decades and connect how theories of cartilage lubrication have been translated to lubrication-based therapies. Here, we call upon these historical perspectives and highlight the open questions in cartilage lubrication research. Additionally, these open questions within the field's understanding of natural lubrication mechanisms reveal strategic directions for lubrication therapy.
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Affiliation(s)
- Edward D. Bonnevie
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, 151 Weill Hall, 526 Campus Road, Ithaca, NY 14850
| | - Lawrence J. Bonassar
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, 151 Weill Hall, 526 Campus Road, Ithaca, NY 14850; Meinig School of Biomedical Engineering, Cornell University, 151 Weill Hall, 526 Campus Road, Ithaca, NY 14850
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Graham BT, Moore AC, Burris DL, Price C. Detrimental effects of long sedentary bouts on the biomechanical response of cartilage to sliding. Connect Tissue Res 2020; 61:375-388. [PMID: 31910694 DOI: 10.1080/03008207.2019.1673382] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Purpose/Aim: Epidemiological evidence suggests, contrary to popular mythos, that increased exercise/joint activity does not place articular cartilage at increased risk of disease, but instead promotes joint health. One explanation for this might be activity-induced cartilage rehydration; where joint articulation drives restoration of tissue hydration, thickness, and dependent tribomechanical outcomes (e.g., load support, stiffness, and lubricity) lost to joint loading. However, there have been no studies investigating how patterning of intermittent articulation influences the hydration and biomechanical functions of cartilage.Materials and Methods: Here we leveraged the convergent stationary contact area (cSCA) testing configuration and its unique ability to drive tribological rehydration, to elucidate how intermittency of activity affects the biomechanical functions of bovine stifle cartilage under well-controlled sliding conditions that have been designed to model a typical "day" of human joint activity.Results: For a fixed volume of "daily" activity (30 min) and sedentary time (60 min), breaking up intermittent activity into longer and less-frequent bouts (corresponding to longer continuous sedentary periods) resulted in the exposure of articular cartilage to markedly greater strains, losses of interstitial pressure, and friction coefficients.Conclusions: These results demonstrated that the regularity of ex vivo activity regimens, specifically the duration of sedentary bouts, had a dominant effect on the biomechanical functions of articular cartilage. In more practical terms, the results suggest that brief but regular movement patterns (e.g., every hour) may be biomechanically preferred to long and infrequent movement patterns (e.g., a long walk after a sedentary day) when controlling for daily activity volume (e.g., 30 min).
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Affiliation(s)
- Brian T Graham
- Department of Mechanical Engineering, University of Delaware, Newark, DE, USA
| | - Axel C Moore
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA
| | - David L Burris
- Department of Mechanical Engineering, University of Delaware, Newark, DE, USA.,Department of Biomedical Engineering, University of Delaware, Newark, DE, USA
| | - Christopher Price
- Department of Mechanical Engineering, University of Delaware, Newark, DE, USA.,Department of Biomedical Engineering, University of Delaware, Newark, DE, USA
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Han G, Eriten M, Henak CR. Rate-dependent adhesion of cartilage and its relation to relaxation mechanisms. J Mech Behav Biomed Mater 2019; 102:103493. [PMID: 31634661 DOI: 10.1016/j.jmbbm.2019.103493] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 09/25/2019] [Accepted: 10/12/2019] [Indexed: 10/25/2022]
Abstract
Cartilage adhesion has been found to play an important role in friction responses in the boundary lubrication regime, but its underlying mechanisms have only been partially understood. This study investigates the rate dependence of adhesion from pre-to post-relaxation timescales of cartilage and its possible relation to relaxation responses of the tissue. Adhesion tests on cartilage were performed to obtain rate-dependent cartilage adhesion from relaxed to unrelaxed states and corresponding relaxation responses. The rate dependence of cartilage adhesion was analyzed based on experimental relaxation responses. Cartilage adhesion increased about 20 times from relaxed to unrelaxed states. This rate-dependent enhancement correlated well with the load relaxation responses in a characteristic time domain. These experimental results indicated that the degree of recovery (or relaxation) in the vicinity of contact during unloading governed the rate dependence of cartilage adhesion. In addition, the experimentally measured enhancement of adhesion was interpreted with the aid of computationally and analytically predicted adhesion trends in viscoelastic, poroviscoelastic, and cohesive contact models. Agreement between the experimental and predicted trends implied that the enhancement of cartilage adhesion originated from complex combinations of interfacial peeling and negative fluid pressure generated within the contact area during unloading. These findings enhance the current understanding of rate-dependent adhesion mechanisms explored within short time scales and thus could provide new insight into friction responses and stick-induced damage in cartilage.
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Affiliation(s)
- Guebum Han
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, USA.
| | - Melih Eriten
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, USA.
| | - Corinne R Henak
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, USA; Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA; Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI, USA.
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Patel JM, Wise BC, Bonnevie ED, Mauck RL. A Systematic Review and Guide to Mechanical Testing for Articular Cartilage Tissue Engineering. Tissue Eng Part C Methods 2019; 25:593-608. [PMID: 31288616 DOI: 10.1089/ten.tec.2019.0116] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Articular cartilage is integral to the mechanical function of many joints in the body. When injured, cartilage lacks the capacity to self-heal, and thus, therapies and replacements have been developed in recent decades to treat damaged cartilage. Given that the primary function of articular cartilage is mechanical in nature, rigorous physical evaluation of cartilage tissues undergoing treatment and cartilage constructs intended for replacement is an absolute necessity. With the large number of groups developing cartilage tissue engineering strategies, however, a variety of mechanical testing protocols have been reported in the literature. This lack of consensus in testing methods makes comparison between studies difficult at times, and can lead to misinterpretation of data relative to native tissue. Therefore, the purpose of this study was to systematically review mechanical testing of articular cartilage and cartilage repair constructs over the past 10 years (January 2009-December 2018), to highlight the most common testing configurations, and to identify key testing parameters. For the most common tests, key parameters identified in this systematic review were validated by characterizing both cartilage tissue and hydrogels commonly used in cartilage tissue engineering. Our findings show that compression testing was the most common test performed (80.2%; 158/197), followed by evaluation of frictional properties (18.8%; 37/197). Upon further review of those studies performing compression testing, the various modes (ramp, stress relaxation, creep, dynamic) and testing configurations (unconfined, confined, in situ) are described and systematically reviewed for parameters, including strain rate, equilibrium time, and maximum strain. This systematic analysis revealed considerable variability in testing methods. Our validation testing studies showed that such variations in testing criteria could have large implications on reported outcome parameters (e.g., modulus) and the interpretation of findings from these studies. This analysis is carried out for all common testing methods, followed by a discussion of less common trends and directions in the mechanical evaluation of cartilage tissues and constructs. Overall, this work may serve as a guide for cartilage tissue engineers seeking to rigorously evaluate the physical properties of their novel treatment strategies. Impact Statement Articular cartilage tissue engineering has made significant strides with regard to treatments and replacements for injured tissue. The evaluation of these approaches typically involves mechanical testing, yet the plethora of testing techniques makes comparisons between studies difficult, and often leads to misinterpretation of data compared with native tissue. This study serves as a guide for the mechanical testing of cartilage tissues and constructs, highlighting recent trends in test conditions and validating these common procedures. Cartilage tissue engineers, especially those unfamiliar with mechanical testing protocols, will benefit from this study in their quest to physically evaluate novel treatment and regeneration approaches.
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Affiliation(s)
- Jay M Patel
- McKay Orthopedic Research Laboratory, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.,Translational Musculoskeletal Research Center, Corporal Michael J Crescenz VA Medical Center, Philadelphia, Pennsylvania
| | - Brian C Wise
- McKay Orthopedic Research Laboratory, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.,Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Edward D Bonnevie
- McKay Orthopedic Research Laboratory, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.,Translational Musculoskeletal Research Center, Corporal Michael J Crescenz VA Medical Center, Philadelphia, Pennsylvania
| | - Robert L Mauck
- McKay Orthopedic Research Laboratory, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.,Translational Musculoskeletal Research Center, Corporal Michael J Crescenz VA Medical Center, Philadelphia, Pennsylvania.,Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania
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Farnham MS, Larson RE, Burris DL, Price C. Effects of mechanical injury on the tribological rehydration and lubrication of articular cartilage. J Mech Behav Biomed Mater 2019; 101:103422. [PMID: 31527014 DOI: 10.1016/j.jmbbm.2019.103422] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 09/05/2019] [Accepted: 09/06/2019] [Indexed: 12/14/2022]
Abstract
Healthy articular cartilage is crucial to joint function, as it provides the low friction and load bearing surface necessary for joint articulation. Nonetheless, joint injury places patients at increased risk of experiencing both accelerated cartilage degeneration and wear, and joint dysfunction due to post-traumatic osteoarthritis (PTOA). In this study, we used our ex vivo convergent stationary contact area (cSCA) explant testing configuration to demonstrate that high-speed sliding of healthy tissues against glass could drive consistent and reproducible recovery of compression-induced cartilage deformation, through the mechanism of 'tribological rehydration'. In contrast, the presence of physical cartilage damage, mimicking those injuries known to precipitate PTOA, could compromise tribological rehydration and the sliding-driven recovery of cartilage function. Full-thickness cartilage injuries (i.e. fissures and chondral defects) markedly suppressed sliding-driven tribological rehydration. In contrast, impaction to cartilage, which caused surface associated damage, had little effect on the immediate tribomechanical response of explants to sliding (deformation/strain, tribological rehydration, and friction/lubricity). By leveraging the unique ability of the cSCA configuration to support tribological rehydration, this study permitted the first direct ex vivo investigation of injury-dependent strain and friction outcomes in cartilage under testing conditions that replicate and maintain physiologically-relevant levels of fluid load support and frictional outcomes under high sliding speeds (80 mm/s) and moderate compressive stresses (~0.3 MPa). Understanding how injury alters cartilage tribomechanics during sliding sheds light on mechanisms by which cartilage's long-term resilience and low frictional properties are maintained, and can guide studies investigating the functional consequences of physical injury and joint articulation on cartilage health, disease, and rehabilitation.
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Affiliation(s)
- Margot S Farnham
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA.
| | - Riley E Larson
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA.
| | - David L Burris
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA; Department of Mechanical Engineering, University of Delaware, Newark, DE, USA.
| | - Christopher Price
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA; Department of Mechanical Engineering, University of Delaware, Newark, DE, USA.
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Bonnevie ED, Galesso D, Secchieri C, Bonassar LJ. Frictional characterization of injectable hyaluronic acids is more predictive of clinical outcomes than traditional rheological or viscoelastic characterization. PLoS One 2019; 14:e0216702. [PMID: 31075142 PMCID: PMC6510437 DOI: 10.1371/journal.pone.0216702] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 04/28/2019] [Indexed: 02/06/2023] Open
Abstract
Hyaluronic acid injections have been a mainstay of arthritis treatment for decades. However, much controversy remains about their clinical efficacy and their potential mechanism of action. This approach to arthritis therapy is often called viscosupplementation, a term which is rooted in the elevated viscosity of the injected solutions. This terminology also suggests a mechanical pathway of action and further implies that their efficacy is dependent on viscosity. Notably, previous studies of the relationship between viscous properties of hyaluronic acid solutions and their clinical efficacy have not been definitive. Recently we developed an experimental and analytical framework for studying cartilage lubrication that captures the Stribeck-like behavior of cartilage in an elastoviscous transition curve. Here we apply this framework to study the lubricating behavior of six hyaluronan products currently used for injectable arthritis therapy in the US. Despite the fact that the source and chemical modifications endow these products with a range of lubricating properties, we show that the lubricating effect of all of these materials can be described by this Stribeck-like elastoviscous transition. Fitting this data to the elastoviscous transition model enables the calculation of effective lubricating viscosities for each material, which differ substantially from the viscosities measured using standard rheometry. Further we show that while data from standard rheometry are poor predictors of clinical performance of these materials, measurements of friction coefficient and effective lubricating viscosity correlate well (R2 = 0.77; p < 0.005) with assessments of improved clinical function reported previously. This approach offers both a novel method that can be used to evaluate potential clinical efficacy of hyaluronic acid formulations and provide new insight on their mode of action.
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Affiliation(s)
- Edward D. Bonnevie
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, United States of America
| | | | | | - Lawrence J. Bonassar
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, United States of America
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, United States of America
- * E-mail:
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Feeney E, Peal BT, Inglis JE, Su J, Nixon AJ, Bonassar LJ, Reesink HL. Temporal changes in synovial fluid composition and elastoviscous lubrication in the equine carpal fracture model. J Orthop Res 2019; 37:1071-1079. [PMID: 30859611 PMCID: PMC6768400 DOI: 10.1002/jor.24281] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 02/20/2019] [Indexed: 02/04/2023]
Abstract
The objective of this study was to examine temporal variations in synovial fluid composition and lubrication following articular fracture. Post-traumatic osteoarthritis (PTOA) was induced by creating an osteochondral fracture in the middle carpal joint of four horses while the contralateral limb served as a sham-operated control. Horses were exercised on a high-speed treadmill, and synovial fluid was collected pre-operatively and at serial timepoints until 75 days post-operatively. Lubricin and hyaluronic acid (HA) concentrations were measured using sandwich ELISAs, and the molecular weight distribution of HA was analyzed via gel electrophoresis. Synovial fluid viscosity and cartilage friction coefficients across all modes of lubrication were measured on days 0, 19, 33, and 61 using a commercial rheometer and a custom tribometer, respectively. HA concentrations were significantly decreased post-operatively, and high molecular weight HA (>6.1MDa) did not recover to pre-operative values by the study termination at day 75. Lubricin concentrations increased after surgery to a greater extent in the OA as compared to sham-operated limbs. Viscosity was significantly reduced after surgery. While boundary and elastoviscous mode friction coefficients did not vary, the transition number, representing the shift between these modes, was lower. Although more pronounced in the OA limbs, similar derangements in HA, HA molecular weight distribution, viscosity, and transition number were observed in the sham-operated limbs, which may be explained by synovial fluid washout during arthroscopy. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res.
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Affiliation(s)
- Elizabeth Feeney
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York
| | - Bridgette T. Peal
- Cornell University College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - Jacqueline E. Inglis
- Cornell University College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - Jin Su
- Cornell University College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - Alan J. Nixon
- Cornell University College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - Lawrence J. Bonassar
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York,Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York
| | - Heidi L. Reesink
- Cornell University College of Veterinary Medicine, Cornell University, Ithaca, New York
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Hurtig M, Zaghoul I, Sheardown H, Schmidt TA, Liu L, Zhang L, Elsaid KA, Jay GD. Two compartment pharmacokinetic model describes the intra-articular delivery and retention of rhprg4 following ACL transection in the Yucatan mini pig. J Orthop Res 2019; 37:386-396. [PMID: 30488470 PMCID: PMC7201402 DOI: 10.1002/jor.24191] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 10/03/2018] [Indexed: 02/04/2023]
Abstract
Treatment of the injured joint with rhPRG4 is based on recent observations that inflammation diminishes expression of native PRG4. Re-establishing lubrication between pressurized and sliding cartilage surfaces during locomotion promotes the nascent expression of PRG4 and thus intra-articular (IA) treatment strategies should be supported by pharmacokinetic evidence establishing the residence time of rhPRG4. A total of 21 Yucatan minipigs weighing ∼55 kg each received 4 mg of 131 I-rhPRG4 delivered by IA injection 5 days following surgical ACL transection. Animals were sequentially euthanized following IA rhPRG4 at 10 min (time zero), 24, 72 h, 6, 13 and 20 days later. The decay of the 131 I-rhPRG4 was measured relative to a non-injected aliquot and normalized to the weight of cartilage samples, menisci and synovium, and known cartilage volumes from each compartment surface obtained from representative Yucatan minipig knees. Decay of 131 I-rhPRG4 from joint tissues best fit a two-compartment model with an α half-life (t1/2α ) of 11.28 h and β half-life (t1/2β ) of 4.81 days. The tibial and femoral cartilage, meniscii, and synovium retained 7.7% of dose at 24 h. High concentrations of rhPRG4 were found in synovial fluid (SF) that was non-aspiratable and resided on the articular surfaces, removable by irrigation, at 10 min following 131 I-rhPRG4 injection. Synovial fluid K21 exceeded K12 and SF t1/2β was 28 days indicating SF is the reservoir for rhPRG4 following IA injection. Clinical Significance: rhPRG4 following IA delivery in a traumatized joint populates articular surfaces for a considerable period and may promote the native expression of PRG4. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:386-396, 2019.
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Affiliation(s)
- Mark Hurtig
- Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Iman Zaghoul
- Department of Pharmaceutical Sciences, Massachusetts College of Pharmacy and Health Sciences, Boston, Massachusetts
| | - Heather Sheardown
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - Tannin A. Schmidt
- School of Dental Medicine, University of Connecticut Health Center, Farmington, Connecticut,,Biomedical Engineering Department, University of Connecticut Health Center, Farmington, Connecticut
| | - Lina Liu
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - Ling Zhang
- Department of Emergency Medicine, Warren Alpert Medical School, Brown University, 1 Hoppin Street, Coro West Suite 112, Providence, Rhode Island 02903
| | - Khaled A. Elsaid
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California
| | - Gregory D. Jay
- Department of Emergency Medicine, Warren Alpert Medical School, Brown University, 1 Hoppin Street, Coro West Suite 112, Providence, Rhode Island 02903,,Division of Biomedical Engineering, School of Engineering at Brown University, Providence, Rhode Island
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Maximum shear strain-based algorithm can predict proteoglycan loss in damaged articular cartilage. Biomech Model Mechanobiol 2019; 18:753-778. [PMID: 30631999 DOI: 10.1007/s10237-018-01113-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 12/24/2018] [Indexed: 01/25/2023]
Abstract
Post-traumatic osteoarthritis (PTOA) is a common disease, where the mechanical integrity of articular cartilage is compromised. PTOA can be a result of chondral defects formed due to injurious loading. One of the first changes around defects is proteoglycan depletion. Since there are no methods to restore injured cartilage fully back to its healthy state, preventing the onset and progression of the disease is advisable. However, this is problematic if the disease progression cannot be predicted. Thus, we developed an algorithm to predict proteoglycan loss of injured cartilage by decreasing the fixed charge density (FCD) concentration. We tested several mechanisms based on the local strains or stresses in the tissue for the FCD loss. By choosing the degeneration threshold suggested for inducing chondrocyte apoptosis and cartilage matrix damage, the algorithm driven by the maximum shear strain showed the most substantial FCD losses around the lesion. This is consistent with experimental findings in the literature. We also observed that by using coordinate system-independent strain measures and selecting the degeneration threshold in an ad hoc manner, all the resulting FCD distributions would appear qualitatively similar, i.e., the greatest FCD losses are found at the tissue adjacent to the lesion. The proposed strain-based FCD degeneration algorithm shows a great potential for predicting the progression of PTOA via biomechanical stimuli. This could allow identification of high-risk defects with an increased risk of PTOA progression.
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