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Jahr H, van der Windt AE, Timur UT, Baart EB, Lian WS, Rolauffs B, Wang FS, Pufe T. Physosmotic Induction of Chondrogenic Maturation Is TGF-β Dependent and Enhanced by Calcineurin Inhibitor FK506. Int J Mol Sci 2022; 23:ijms23095110. [PMID: 35563498 PMCID: PMC9100228 DOI: 10.3390/ijms23095110] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 04/25/2022] [Accepted: 04/30/2022] [Indexed: 02/04/2023] Open
Abstract
Increasing extracellular osmolarity 100 mOsm/kg above plasma level to the physiological levels for cartilage induces chondrogenic marker expression and the differentiation of chondroprogenitor cells. The calcineurin inhibitor FK506 has been reported to modulate the hypertrophic differentiation of primary chondrocytes under such conditions, but the molecular mechanism has remained unclear. We aimed at clarifying its role. Chondrocyte cell lines and primary cells were cultured under plasma osmolarity and chondrocyte-specific in situ osmolarity (+100 mOsm, physosmolarity) was increased to compare the activation of nuclear factor of activated T-cells 5 (NFAT5). The effects of osmolarity and FK506 on calcineurin activity, cell proliferation, extracellular matrix quality, and BMP- and TGF-β signaling were analyzed using biochemical, gene, and protein expression, as well as reporter and bio-assays. NFAT5 translocation was similar in chondrocyte cell lines and primary cells. High supraphysiological osmolarity compromised cell proliferation, while physosmolarity or FK506 did not, but in combination increased proteoglycan and collagen expression in chondrocytes in vitro and in situ. The expression of the TGF-β-inducible protein TGFBI, as well as chondrogenic (SOX9, Col2) and terminal differentiation markers (e.g., Col10) were affected by osmolarity. Particularly, the expression of minor collagens (e.g., Col9, Col11) was affected. The inhibition of the FK506-binding protein suggests modulation at the TGF-β receptor level, rather than calcineurin-mediated signaling, as a cause. Physiological osmolarity promotes terminal chondrogenic differentiation of progenitor cells through the sensitization of the TGF-β superfamily signaling at the type I receptor. While hyperosmolarity alone facilitates TGF-β superfamily signaling, FK506 further enhances signaling by releasing the FKBP12 break from the type I receptor to improve collagenous marker expression. Our results help explain earlier findings and potentially benefit future cell-based cartilage repair strategies.
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Affiliation(s)
- Holger Jahr
- Department of Anatomy and Cell Biology, University Hospital RWTH Aachen University, 52074 Aachen, Germany; (U.T.T.); (T.P.)
- Department of Orthopaedic Surgery, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands
- Correspondence: ; Tel.: +49-2418089525
| | - Anna E. van der Windt
- Department of Orthopaedics, Erasmus MC University Medical Center, 3015 GD Rotterdam, The Netherlands;
| | - Ufuk Tan Timur
- Department of Anatomy and Cell Biology, University Hospital RWTH Aachen University, 52074 Aachen, Germany; (U.T.T.); (T.P.)
- Department of Orthopaedic Surgery, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands
| | - Esther B. Baart
- Department of Obstetrics & Gynaecology, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands;
| | - Wei-Shiung Lian
- Core Laboratory for Phenomics and Diagnostics, Department of Medical Research, College of Medicine, Chang Gung University, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (W.-S.L.); (F.-S.W.)
- Center for Mitochondrial Research and Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Bernd Rolauffs
- G.E.R.N. Research Center for Tissue Replacement, Regeneration & Neogenesis, Department of Orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center, Albert-Ludwigs-University, 79085 Freiburg, Germany;
| | - Feng-Sheng Wang
- Core Laboratory for Phenomics and Diagnostics, Department of Medical Research, College of Medicine, Chang Gung University, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (W.-S.L.); (F.-S.W.)
- Center for Mitochondrial Research and Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Thomas Pufe
- Department of Anatomy and Cell Biology, University Hospital RWTH Aachen University, 52074 Aachen, Germany; (U.T.T.); (T.P.)
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Abstract
Cartilage remodeling is currently among the most popular topics in osteoarthritis research. Remodeling includes removal of the existing cartilage and replacement by neo-cartilage. As a loss of balance between removal and replacement of articular cartilage develops (particularly, the rate of removal surpasses the rate of replacement), joints will begin to degrade. In the last few years, significant progress in molecular understanding of the cartilage remodeling process has been made. In this brief review, we focus on the discussion of some current "controversial" observations in articular cartilage degeneration: (1) the biological effect of transforming growth factor-beta 1 on developing and mature articular cartilages, (2) the question of whether aggrecanase 1 (ADAMTS4) and aggrecanase 2 (ADAMTS5) are key enzymes in articular cartilage destruction, and (3) chondrocytes versus chondron in the development of osteoarthritis. It is hoped that continued discussion and investigation will follow to better clarify these topics. Clarification will be critical for those in search of novel therapeutic targets for the treatment of osteoarthritis.
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Affiliation(s)
- Yefu Li
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, USA ; Faculty of Medicine, Harvard Medical School, Boston, MA, USA
| | - Lin Xu
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, USA ; Faculty of Medicine, Harvard Medical School, Boston, MA, USA
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Vonk LA, de Windt TS, Kragten AHM, Beekhuizen M, Mastbergen SC, Dhert WJA, Lafeber FPJG, Creemers LB, Saris DBF. Enhanced cell-induced articular cartilage regeneration by chondrons; the influence of joint damage and harvest site. Osteoarthritis Cartilage 2014; 22:1910-7. [PMID: 25151084 DOI: 10.1016/j.joca.2014.08.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 06/30/2014] [Accepted: 08/13/2014] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Interactions between chondrocytes and their native pericellular matrix provide optimal circumstances for regeneration of cartilage. However, cartilage diseases such as osteoarthritis change the pericellular matrix, causing doubt to them as a cell source for autologous cell therapy. METHODS Chondrons and chondrocytes were isolated from stifle joints of goats in which cartilage damage was surgically induced in the right knee. After 4 weeks of regeneration culture, DNA content and proteoglycan and collagen content and release were determined. RESULTS The cartilage regenerated by chondrons isolated from the damaged joint contained less proteoglycans and collagen compared to chondrons from the same harvest site in the nonoperated knee (P < 0.01). Besides, chondrons still reflected whether they were isolated from a damaged joint, even if they where isolated from the opposing or adjacent condyle. Although chondrocytes did not reflect this diseased status of the joint, chondrons always outperformed chondrocytes, even when isolated from the damaged joints (P < 0.0001). Besides increased cartilage production, the chondrons showed less collagenase activity compared to the chondrocytes. CONCLUSION Chondrons still outperform chondrocytes when they were isolated from a damaged joint and they might be a superior cell source for articular cartilage repair and cell-induced cartilage formation.
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Affiliation(s)
- L A Vonk
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands.
| | - T S de Windt
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - A H M Kragten
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - M Beekhuizen
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - S C Mastbergen
- Department of Rheumatology & Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - W J A Dhert
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands; Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - F P J G Lafeber
- Department of Rheumatology & Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - L B Creemers
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - D B F Saris
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands; Tissue Regeneration, MIRA Institute, University Twente, Enschede, The Netherlands
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Jeon JE, Schrobback K, Meinert C, Sramek V, Hutmacher DW, Klein TJ. Effect of preculture and loading on expression of matrix molecules, matrix metalloproteinases, and cytokines by expanded osteoarthritic chondrocytes. ACTA ACUST UNITED AC 2013; 65:2356-67. [PMID: 23780780 DOI: 10.1002/art.38049] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 06/04/2013] [Indexed: 11/07/2022]
Abstract
OBJECTIVE One of the pathologic changes that occurs during osteoarthritis (OA) is the degeneration of the pericellular matrix (PCM). Since the PCM is likely to be involved in mechanotransduction, this study was undertaken to investigate the effects of PCM-like matrix accumulation in zonal OA chondrocytes and their influence on chondrocyte response to compression. METHODS Superficial and middle/deep zone chondrocytes from macroscopically normal cartilage of OA knees were expanded and encapsulated in alginate gels. The effects of compression (short-term or long-term) and preculture on chondrocyte expression of various matrix molecules, cytokines, and matrix metalloproteinases (MMPs) were assessed. Additionally, nonexpanded chondrocytes were encapsulated in alginate and cultured in the presence or absence of transforming growth factor β1 (TGFβ1) and dexamethasone and analyzed following short-term compression experiments. RESULTS Expanded OA chondrocytes (superficial and middle/deep zone) that were precultured for 2 weeks under free-swelling conditions prior to dynamic compression responded more sensitively to loading and had increased matrix accumulation, increased interleukin-1β (IL-1β) and IL-4 levels, and decreased levels of MMP-2 (in the middle/deep zone) compared to the nonloaded controls. Compression also decreased MMP-3 and MMP-13 levels even without preculture. Nonexpanded chondrocytes did not respond to compression, but differences in gene expression were found depending on the zone of harvest, time in culture, and medium composition. CONCLUSION Our findings demonstrate that with predeposited PCM-like matrix, compressive stimulation can enhance matrix protein accumulation in expanded OA chondrocytes. Investigations into how PCM or other matrix components differentially affect this balance under mechanical loading may provide invaluable insight into OA pathogenesis and the use of expanded cells in tissue engineering and regenerative medicine-based applications.
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Affiliation(s)
- June E Jeon
- Queensland University of Technology, Brisbane, Queensland, Australia
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Khan IM, Evans SL, Young RD, Blain EJ, Quantock AJ, Avery N, Archer CW. Fibroblast growth factor 2 and transforming growth factor β1 induce precocious maturation of articular cartilage. ACTA ACUST UNITED AC 2013; 63:3417-27. [PMID: 21769844 DOI: 10.1002/art.30543] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE We have discovered that a combination of fibroblast growth factor 2 and transforming growth factor β1 induce profound morphologic changes in immature articular cartilage. The purpose of this study was to test the hypothesis that these changes represent accelerated postnatal maturation. METHODS Histochemical and biochemical assays were used to confirm the nature of the morphologic changes that accompany growth factor stimulation of immature bovine articular cartilage explants in serum-free culture medium. Growth factor-induced apoptosis, cellular proliferation, and changes in the collagen network were also quantitatively analyzed. RESULTS Growth factor stimulation resulted in rapid resorption from the basal aspect of immature cartilage explants that was simultaneously opposed by cellular proliferation from the apical aspect driven from a pool of chondroprogenitor cells we have previously described. Maturation-dependent changes in tissue stiffness, collagen crosslinking, and collagen fibril architecture as well as differentiation of the extracellular matrix into distinct pericellular, territorial, and interterritorial domains were all present in growth factor-stimulated cartilage samples and absent in control samples. CONCLUSION Our data demonstrate that it is possible to significantly enhance the maturation of cartilage tissue using specific growth factor stimulation. This may have applications in transplantation therapy or in the treatment of diseased cartilage, through phenotype modulation of osteoarthritic chondrocytes in order to stimulate growth and maturation of cartilage repair tissue.
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Abazari A, Thompson RB, Elliott JAW, McGann LE. Transport phenomena in articular cartilage cryopreservation as predicted by the modified triphasic model and the effect of natural inhomogeneities. Biophys J 2012; 102:1284-93. [PMID: 22455911 DOI: 10.1016/j.bpj.2011.12.058] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 12/12/2011] [Accepted: 12/14/2011] [Indexed: 11/28/2022] Open
Abstract
Knowledge of the spatial and temporal distribution of cryoprotective agent (CPA) is necessary for the cryopreservation of articular cartilage. Cartilage dehydration and shrinkage, as well as the change in extracellular osmolality, may have a significant impact on chondrocyte survival during and after CPA loading, freezing, and thawing, and during CPA unloading. In the literature, Fick's law of diffusion is commonly used to predict the spatial distribution and overall concentration of the CPA in the cartilage matrix, and the shrinkage and stress-strain in the cartilage matrix during CPA loading are neglected. In this study, we used a previously described biomechanical model to predict the spatial and temporal distributions of CPA during loading. We measured the intrinsic inhomogeneities in initial water and fixed charge densities in the cartilage using magnetic resonance imaging and introduced them into the model as initial conditions. We then compared the prediction results with the results obtained using uniform initial conditions. The simulation results in this study demonstrate the presence of a significant mechanical strain in the matrix of the cartilage, within all layers, during CPA loading. The osmotic response of the chondrocytes to the cartilage dehydration during CPA loading was also simulated. The results reveal that a transient shrinking occurs to different levels, and the chondrocytes experience a significant decrease in volume, particularly in the middle and deep zones of articular cartilage, during CPA loading.
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Affiliation(s)
- Alireza Abazari
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
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7
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Parsons P, Gilbert SJ, Vaughan-Thomas A, Sorrell DA, Notman R, Bishop M, Hayes AJ, Mason DJ, Duance VC. Type IX collagen interacts with fibronectin providing an important molecular bridge in articular cartilage. J Biol Chem 2011; 286:34986-97. [PMID: 21768108 DOI: 10.1074/jbc.m111.238188] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Type IX collagen is covalently bound to the surface of type II collagen fibrils within the cartilage extracellular matrix. The N-terminal, globular noncollagenous domain (NC4) of the α1(IX) chain protrudes away from the surface of the fibrils into the surrounding matrix and is available for molecular interactions. To define these interactions, we used the NC4 domain in a yeast two-hybrid screen of a human chondrocyte cDNA library. 73% of the interacting clones encoded fibronectin. The interaction was confirmed using in vitro immunoprecipitation and was further characterized by surface plasmon resonance. Using whole and pepsin-derived preparations of type IX collagen, the interaction was shown to be specific for the NC4 domain with no interaction with the triple helical collagenous domains. The interaction was shown to be of high affinity with nanomolar K(d) values. Analysis of the fibronectin-interacting clones indicates that the constant domain is the likely site of interaction. Type IX collagen and fibronectin were shown to co-localize in cartilage. This novel interaction between the NC4 domain of type IX collagen and fibronectin may represent an in vivo interaction in cartilage that could contribute to the matrix integrity of the tissue.
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Affiliation(s)
- Philippa Parsons
- Research Centre, Smith & Nephew, York Science Park, Heslington, York YO10 5DF, United Kingdom
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8
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Lotz MK, Otsuki S, Grogan SP, Sah R, Terkeltaub R, D'Lima D. Cartilage cell clusters. ACTA ACUST UNITED AC 2010; 62:2206-18. [PMID: 20506158 DOI: 10.1002/art.27528] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Martin K Lotz
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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9
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Vigfúsdóttir ÁT, Pasrija C, Thakore PI, Schmidt RB, Hsieh AH. Role of Pericellular Matrix in Mesenchymal Stem Cell Deformation during Chondrogenic Differentiation. Cell Mol Bioeng 2010. [DOI: 10.1007/s12195-010-0135-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Vonk LA, Doulabi BZ, Huang C, Helder MN, Everts V, Bank RA. Preservation of the chondrocyte's pericellular matrix improves cell-induced cartilage formation. J Cell Biochem 2010; 110:260-71. [PMID: 20213765 DOI: 10.1002/jcb.22533] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The extracellular matrix surrounding chondrocytes within a chondron is likely to affect the metabolic activity of these cells. In this study we investigated this by analyzing protein synthesis by intact chondrons obtained from different types of cartilage and compared this with chondrocytes. Chondrons and chondrocytes from goats from different cartilage sources (articular cartilage, nucleus pulposus, and annulus fibrosus) were cultured for 0, 7, 18, and 25 days in alginate beads. Real-time polymerase chain reaction analyses indicated that the gene expression of Col2a1 was consistently higher by the chondrons compared with the chondrocytes and the Col1a1 gene expression was consistently lower. Western blotting revealed that Type II collagen extracted from the chondrons was cross-linked. No Type I collagen could be extracted. The amount of proteoglycans was higher for the chondrons from articular cartilage and nucleus pulposus compared with the chondrocytes, but no differences were found between chondrons and chondrocytes from annulus fibrosus. The expression of both Mmp2 and Mmp9 was higher by the chondrocytes from articular cartilage and nucleus pulposus compared with the chondrons, whereas no differences were found with the annulus fibrosus cells. Gene expression of Mmp13 increased strongly by the chondrocytes (>50-fold), but not by the chondrons. Taken together, our data suggest that preserving the pericellular matrix has a positive effect on cell-induced cartilage production.
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Affiliation(s)
- Lucienne A Vonk
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, Research Institute MOVE, Amsterdam, The Netherlands
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Kim E, Guilak F, Haider MA. The dynamic mechanical environment of the chondrocyte: a biphasic finite element model of cell-matrix interactions under cyclic compressive loading. J Biomech Eng 2009; 130:061009. [PMID: 19045538 DOI: 10.1115/1.2978991] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cyclic mechanical loading of articular cartilage results in a complex biomechanical environment at the scale of the chondrocytes that strongly affects cellular metabolic activity. Under dynamic loading conditions, the quantitative relationships between macroscopic loading characteristics and solid and fluid mechanical variables in the local cellular environment are not well understood. In this study, an axisymmetric multiscale model of linear biphasic cell-matrix interactions in articular cartilage was developed to investigate the cellular microenvironment in an explant subjected to cyclic confined compressive loading. The model was based on the displacement-velocity-pressure (u-v-p) mixed-penalty weighted residual formulation of linear biphasic theory that was implemented in the COMSOL MULTIPHYSICS software package. The microscale cartilage environment was represented as a three-zone biphasic region consisting of a spherical chondrocyte with encapsulating pericellular matrix (PCM) that was embedded in a cylindrical extracellular matrix (ECM) subjected to cyclic confined compressive loading boundary conditions. Biphasic material properties for the chondrocyte and the PCM were chosen based on previous in vitro micropipette aspiration studies of cells or chondrons isolated from normal or osteoarthritic cartilage. Simulations performed at four loading frequencies in the range 0.01-1.0 Hz supported the hypothesized dual role of the PCM as both a protective layer for the cell and a mechanical transducer of strain. Time varying biphasic variables at the cellular scale were strongly dependent on relative magnitudes of the loading period, and the characteristic gel diffusion times for the ECM, the PCM, and the chondrocyte. The multiscale simulations also indicated that axial strain was significantly amplified in the range 0.01-1.0 Hz, with a decrease in amplification factor and frequency insensitivity at the higher frequencies. Simulations of matrix degradation due to osteoarthritis indicated that strain amplification factors were more significantly altered when loss of matrix stiffness was exclusive to the PCM. The findings of this study demonstrate the complex dependence of dynamic mechanics in the local cellular environment of cartilage on macroscopic loading features and material properties of the ECM and the chondron.
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Affiliation(s)
- Eunjung Kim
- Department of Mathematics, North Carolina State University, Raleigh, NC 27695, USA
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12
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Wang QG, El Haj AJ, Kuiper NJ. Glycosaminoglycans in the pericellular matrix of chondrons and chondrocytes. J Anat 2008; 213:266-73. [PMID: 18631286 DOI: 10.1111/j.1469-7580.2008.00942.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
This is the first study to quantitate and profile the glycosaminoglycan (GAG) composition of the pericellular matrix (PCM) of chondrons and chondrocytes using the highly sensitive technique; fluorophore-assisted carbohydrate electrophoresis (FACE). Bovine articular chondrocytes and chondrons were isolated enzymatically. High cell yield and viability were obtained for both preparations. Chondrons had strong immunofluorescent labeling for keratan sulphate and chondroitin-6 sulphate but no labeling for hyaluronan. We compared the immunofluorescent data with FACE. The quantities of total keratan sulphate were determined to be 0.013 +/- 0.002 pg cell(-1) and 0.032 +/- 0.003 pg cell(-1) in the chondrocyte and chondron preparations, respectively. Four internal keratan sulphate sugars were detected (gal beta 1,4glcNAc6S, gal6S beta 1,4glcNAc6S, glcNAc beta 1,3gal and glcNAc6S beta 1,3gal) for both preparations but they were present at significantly higher concentrations in chondron preparations (P < 0.01). Total chondroitin sulphate (CS) was determined to be 0.054 +/- 0.004 pg cell(-1) and 0.077 +/- 0.005 pg cell(-1) for chondrocyte and chondron preparations, respectively. Unsulphated CS disaccharide levels were similar but chondrons had significantly more chondroitin-4 sulphated disaccharides and chondroitin-6 sulphated disaccharides (P < 0.05). Hyaluronan acid was present at low concentrations (0.010 +/- 0.001 pg cell(-1)) in both chondrocytes and chondrons. In this study, enzyme digestion coupled with FACE separation revealed new information about the differences in GAGs from isolated chondrocyte and chondron preparations. Further investigation of the differences in GAGs from chondrocytes and chondrons from different zones of articular cartilage may be useful for tissue engineering approaches.
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Affiliation(s)
- Qi Guang Wang
- Institute for Science & Technology in Medicine, University of Keele, Huxley Building, Staffordshire, ST5 5BG, UK
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Hu K, Xu L, Cao L, Flahiff CM, Brussiau J, Ho K, Setton LA, Youn I, Guilak F, Olsen BR, Li Y. Pathogenesis of osteoarthritis-like changes in the joints of mice deficient in type IX collagen. ACTA ACUST UNITED AC 2006; 54:2891-900. [PMID: 16947423 DOI: 10.1002/art.22040] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To examine the pathogenetic mechanisms of osteoarthritis (OA)-like changes in Col9a1-/- mice, which are deficient in type IX collagen. METHODS Knee joints and temporomandibular joints (TMJs) from Col9a1-/- mice and their wild-type (Col9a1+/+) littermates were examined by light microscopy. Immunohistochemical staining was performed to examine the expression of matrix metalloproteinase 3 (MMP-3) and MMP-13, degraded type II collagen, and the discoidin domain receptor 2 (DDR-2) in knee joints. Cartilage mechanics were also evaluated for compressive properties by microindentation testing of the tibial plateau and for tensile properties by osmotic loading of the femoral condyle. RESULTS Histologic analysis showed age-dependent OA-like changes in the knee and TMJs of Col9a1-/- mice starting at the age of 3 months. At the age of 6 months, enhanced proteoglycan degradation was observed in the articular cartilage of the knee and TMJs of the mutant mice. The expression of MMP-13 and DDR-2 protein and the amount of degraded type II collagen were higher in the knee joints of Col9a1-/- mice than in their wild-type littermates at the age of 6 months. Changes in cartilage mechanics were observed in the femoral and tibial plateaus of Col9a1-/- mice at 6 months, including a decrease in the compressive modulus and uniaxial modulus. At 3 and 6 months of age, tibial cartilage in Col9a1-/- mice was found to be more permeable to fluid flow, with an associated compromise in the fluid pressurization mechanism of load support. All of these changes occurred only at medial sites. CONCLUSION Lack of type IX collagen in Col9a1-/- mice results in age-dependent OA-like changes in the knee joints and TMJs.
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Affiliation(s)
- K Hu
- Harvard School of Dental Medicine, Boston, Massachusetts 02115, USA
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14
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Ustünel I, Cayli S, Güney K, Celik-Ozenci C, Tanriöver G, Sahin Z, Balkan E, Demir R. Immunohistochemical distribution patterns of collagen type II, chondroitin 4-sulfate, laminin and fibronectin in human nasal septal cartilage. Acta Histochem 2004; 105:109-14. [PMID: 12831162 DOI: 10.1078/0065-1281-00699] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Collagen type II, chondroitin 4-sulfate, laminin and fibronectin are major components of cartilage matrix. It is important to know their distribution patterns to evaluate relationships between cartilage cells and surrounding cartilage matrix. In the present study, we investigated localization patterns of these macromolecules in human nasal septal cartilage by immunohistochemical methods. Samples of human nasal septal cartilage were obtained from patients with nasal septum deviations who underwent septoplastic operation and were prepared for immunohistochemical examination. Distribution patterns of cartilage matrix macromolecules correlated with those found in other cartilage tissues. Diffuse staining of collagen type II was found in the cartilage matrix, chondroitin 4-sulfate immunostaining was present in the cytoplasm and like a pericellular ring around chondrocytes. Laminin immunostaining was found in the cytoplasm of chondrocytes, and fibronectin was localized in the pericellular matrix and in capsules of human nasal septal cartilage. Moreover, fibronectin was also detected at high levels in the interconnecting segments between adjacent chondrons. In conclusion, similar localisation patterns of the components investigated in human septal cartilage as in other tissues indicate that these macromolecules may play a role in both cell-matrix adhesion and matrix-matrix cohesion in the pericellular microenvironment surrounding nasal septal cartilage chondrocytes as in other cartilage tissues.
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Affiliation(s)
- Ismail Ustünel
- Department of Histology and Embryology, Faculty of Medicine, Akdeniz University, Antalya, Turkey.
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15
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Sharawy M, Ali AM, Choi WS. Experimental induction of anterior disk displacement of the rabbit craniomandibular joint: an immuno-electron microscopic study of collagen and proteoglycan occurrence in the condylar cartilage. J Oral Pathol Med 2003; 32:176-84. [PMID: 12581388 DOI: 10.1034/j.1600-0714.2003.00074.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Results from our previous studies suggest that surgical induction of anterior disk displacement (ADD) in the rabbit craniomandibular joint (CMJ) leads to histopathological alterations consistent with osteoarthritis. In addition, molecular changes in collagens and glycosaminoglycans (GAGs) were observed using immunohistochemistry. The purpose of the present study was to further characterize those molecular changes in collagens and GAGs using immuno-electron microscopy. METHODS The right joint of 15 rabbits was exposed surgically and all discal attachments were cut except for the posterior attachment (the bilaminar zone). The disc was then repositioned anteriorly and sutured to the zygomatic arch. The left joint was used as a sham-operated control. Ten additional joints were used as non-operated controls. Mandibular condyles were removed 2 weeks following surgery and processed for light and immuno-electron microscopy using colloidal gold-labeled antibodies against collagen type I, II, VI and IX and against keratan sulfate, chondroitin-4 and -6-sulfate, and link protein. RESULTS Light microscopic results showed osteoarthritic changes. Immuno-electron microscopy of osteoarthritic cartilage demonstrated a decline in type II collagen, the abnormal presence of type I collagen and loss of type VI and IX collagens. Quantitative colloidal gold immuno-electron microscopy confirmed the depletion of keratan sulfate, chondroitin-4 and -6-sulfate, and link protein in osteoarthritic cartilage. CONCLUSION Anterior disk displacement leads to molecular alterations in both the collagen and the proteoglycans of rabbit condylar cartilage characteristic of osteoarthritis in other synovial joints. These alterations are consistent with loss of the shock absorber function of the cartilage and injury of the underlying bone.
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Affiliation(s)
- Mohamed Sharawy
- Department of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, GA 30912-1122, USA.
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Söder S, Hambach L, Lissner R, Kirchner T, Aigner T. Ultrastructural localization of type VI collagen in normal adult and osteoarthritic human articular cartilage. Osteoarthritis Cartilage 2002; 10:464-70. [PMID: 12056849 DOI: 10.1053/joca.2002.0512] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Type VI collagen is a major component of the pericellular matrix compartment in articular cartilage and shows severe alterations in osteoarthritic cartilage degeneration. In this study, we analysed the exact localization of type VI collagen in its relationship to the chondrocyte and the (inter)territorial cartilage matrix. Additionally, we were interested in its ultrastructural appearance in normal and osteoarthritic cartilage. DESIGN Distribution and molecular appearance was investigated by conventional immunostaining, by multilabeling confocal scanning microscopy, conventional transmission, and immunoelectron microscopy. RESULTS Our analysis confirmed the pericellular concentration of type VI collagen in normal and degenerated cartilage. Type VI collagen formed an interface in between the cell surface and the type II collagen network. The type VI collagen and the type II collagen networks appeared to have a slight physical overlap in both normal and diseased cartilage. Additionally, some epitope staining was observed in the cell-associated interterritorial cartilage matrix, which did not appear to have an immediate relation to the type II collagen fibrillar network as evaluated by immunoelectron microscopy. In osteoarthritic cartilage, significant differences were found compared with normal articular cartilage: the overall dimension of the lacunar volume increased, and a significantly increased type VI collagen epitope staining was observed in the interterritorial cartilage matrix. Also, the banded isoform of type VI collagen was found around many chondrocytes. CONCLUSIONS Our study confirms the close association of type VI collagen with both, the chondrocyte cell surface and the territorial cartilage matrix. They show severe alterations in type VI collagen distribution and appearance in osteoarthritic cartilage. Our immunohistochemical and ultrastructural data are compatible with two ways of degradation of type VI collagen in osteoarthritic cartilage: (1) the pathologically increased physiological molecular degradation leading to the complete loss of type VI collagen filaments from the pericellular chondrocyte matrix and (2) the transformation of the fine filaments to the band-like form of type VI collagen. Both might implicate a significant loss of function of the pericellular microenvironment in osteoarthritic cartilage.
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Affiliation(s)
- S Söder
- Cartilage Research, Department of Pathology, University of Erlangen-Nürnberg, Germany
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Hagg R, Bruckner P, Hedbom E. Cartilage fibrils of mammals are biochemically heterogeneous: differential distribution of decorin and collagen IX. J Biophys Biochem Cytol 1998; 142:285-94. [PMID: 9660881 PMCID: PMC2133020 DOI: 10.1083/jcb.142.1.285] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Cartilage fibrils contain collagen II as the major constituent, but the presence of additional components, minor collagens, and noncollagenous glycoproteins is thought to be crucial for modulating several fibril properties. We have examined the distribution of two fibril constituents-decorin and collagen IX-in samples of fibril fragments obtained after bovine cartilage homogenization. Decorin was preferentially associated with a population of thicker fibril fragments from adult articular cartilage, but was not present on the thinnest fibrils. The binding was specific for the gap regions of the fibrils, and depended on the decorin core protein. Collagen IX, by contrast, predominated in the population with the thinnest fibrils, and was scarce on wider fibrils. Double-labeling experiments demonstrated the coexistence of decorin and collagen IX in some fibrils of intermediate diameter, although most fibril fragments from adult cartilage were strongly positive for one component and lacked the other. Fibril fragments from fetal epiphyseal cartilage showed a different pattern, with decorin and collagen IX frequently colocalized on fragments of intermediate and large diameters. Hence, the presence of collagen IX was not exclusive for fibrils of small diameter. These results establish that articular cartilage fibrils are biochemically heterogeneous. Different populations of fibrils share collagen II, but have distinct compositions with respect to macromolecules defining their surface properties.
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Affiliation(s)
- R Hagg
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Waldeyerstrasse 15, D-48149 Münster, Federal Republic of Germany
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Hambach L, Neureiter D, Zeiler G, Kirchner T, Aigner T. Severe disturbance of the distribution and expression of type VI collagen chains in osteoarthritic articular cartilage. ARTHRITIS AND RHEUMATISM 1998; 41:986-96. [PMID: 9627008 DOI: 10.1002/1529-0131(199806)41:6<986::aid-art5>3.0.co;2-n] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the messenger RNA (mRNA) expression and distribution of the major pericellular type VI collagen in normal and osteoarthritic (OA) cartilage. METHODS Conventional and confocal laser scanning immunohistochemistry, as well as in situ hybridization experiments, were performed for all 3 collagen type VI chains in sections of normal and OA articular cartilage. RESULTS Normal adult articular chondrocytes were surrounded by a type VI collagen-positive pericellular matrix and showed significant levels of mRNA expression for all 3 type VI collagen chains. In OA cartilage, the expression and overall distribution of type VI collagen was largely increased in the lower middle and upper deep zones. In contrast, the upper zones showed a significant loss of pericellular type VI collagen staining. CONCLUSION Our results suggest that there is a significant basic turnover of type VI collagen in normal articular cartilage. In OA cartilage, the chondrocytes of the lower middle and upper deep zones account for a net increase in type VI collagen synthesis. The loss of type VI collagen staining in the upper zones is most likely the result of increased protein degradation rather than reduced synthetic activity.
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Affiliation(s)
- L Hambach
- Orthopedic Hospital Wichernhaus, Rummelsberg, Schwarzenbruck, Germany
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19
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Chang J, Poole CA. Confocal analysis of the molecular heterogeneity in the pericellular microenvironment produced by adult canine chondrocytes cultured in agarose gel. THE HISTOCHEMICAL JOURNAL 1997; 29:515-28. [PMID: 9279554 DOI: 10.1023/a:1026467724216] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Adult articular chondrocytes are each surrounded by a heterogeneous microenvironment and together form the chondron. Since little is known of chondron development, agarose gel culture, confocal immunohistochemistry and image analysis have been used to characterize the molecular anatomy and temporal development of the chondrocyte pericellular microenvironment in vitro. Two structurally distinct domains were identified during the 12-week culture period. The first comprised a narrow glycocalyx, 1-3 microns in width, which consolidated over time and was rich in collagen types II, VI, IX and XI, fibronectin, decorin and the aggrecan epitopes, 5D4 and HABR. The second region emerged after 4-6 weeks in culture and progressively developed a broad territorial region up to 12 microns wide around the chondrocyte and pericellular glycocalyx. Co-localization studies confirmed the dominance of aggrecan epitopes 2B6, EFG-4, 5D4 and HABR in the territorial domain, whereas surface density mapping with NIH image revealed two patterns of staining, one punctate and stippled, the other more uniform in distribution. The pericellular differentiation identified appeared analogous to the chondrons of adult articular cartilage, and provides an appropriate in vitro model for further studies of cell surface receptor function in the orchestration of pericellular matrix assembly.
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Affiliation(s)
- J Chang
- Department of Anatomy, Faculty of Medicine and Health Science, University of Auckland, New Zealand
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20
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Lee GM, Poole CA, Kelley SS, Chang J, Caterson B. Isolated chondrons: a viable alternative for studies of chondrocyte metabolism in vitro. Osteoarthritis Cartilage 1997; 5:261-74. [PMID: 9404471 DOI: 10.1016/s1063-4584(97)80022-2] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To develop and test a simple enzymatic procedure for isolating chondrons, which consist of the chondrocytes and their surrounding pericellular microenvironment. DESIGN Chondrons were obtained by digesting adult human articular cartilage with a mixture of dispase and collagenase. Chondrons and chondrocytes were cultured in alginate beads, immunofluorescence labeled and examined by confocal microscopy. RESULTS Comparison of freshly isolated chondrons with cryostat sections of cartilage revealed that type VI collagen, type II collagen and aggrecan were retained, but fibronectin and a unique chondroitin sulfate epitope recognized by the antibody, 7D4, were lost. Comparison of enzymatic and mechanical homogenization methods revealed subtle changes in chondron morphology and retention of fibronectin in mechanically isolated chondrons. Average yield of enzyme-isolated chondrons was slightly lower than that of chondrocytes isolated by pronase and collagenase digestion, but was much greater than that reported for mechanically isolated chondrons. Enzyme-isolated chondron viability was greater than 80% 1 day after isolation, and continued to be above 80% through 7 weeks of alginate bead culture. Viability of isolated chondrocytes was initially greater than 80% but fell to 60-80% with time in culture. Chondrons and isolated chondrocytes had a similar division rate except osteoarthritic chondrons were significantly slower after 2 weeks in culture. Cell division was more rapid for nonosteoarthritic chondrons than for osteoarthritic ones. CONCLUSIONS Enzymatic isolation of chondrons is relatively simple, gives better yield and viability than mechanical isolation, but comparable yield and viability of traditional chondrocyte isolation. Enzymatic chondron isolation allows the effect of the in vivo-formed pericellular matrix on chondrocyte metabolism to be studied in vitro.
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Affiliation(s)
- G M Lee
- Thurston Arthritis Research Center, University of North Carolina at Chapel Hill 27599-7280, USA
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21
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Abstract
The chondrocyte and its pericellular microenvironment together represent the chondron, historically considered the primary structural, functional and metabolic unit of articular and other hyaline cartilages. This review summarises research over the last 10 years to establish the molecular anatomy, functional properties and metabolic contribution of the chondron in articular cartilage homeostasis, and its failure during the initiation and progression of degenerative osteoarthritis.
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Affiliation(s)
- C A Poole
- Department of Anatomy, Faculty of Medicine and Health Science, University of Auckland, New Zealand.
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22
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Chang J, Nakajima H, Poole CA. Structural colocalisation of type VI collagen and fibronectin in agarose cultured chondrocytes and isolated chondrons extracted from adult canine tibial cartilage. J Anat 1997; 190 ( Pt 4):523-32. [PMID: 9183676 PMCID: PMC1467638 DOI: 10.1046/j.1469-7580.1997.19040523.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Cell-matrix and matrix-matrix interactions are of critical importance in regulating the development, maintenance and repair of articular cartilage. In this study, we examined the structural colocalisation of type VI collagen and fibronectin in isolated chondrons and long-term agarose cultured chondrocytes extracted from normal adult canine articular cartilage. Using double labelling immunohistochemistry in conjunction with dual channel confocal microscopy and digital image processing we demonstrate that type VI collagen and fibronectin are distributed in a similar staining pattern and are colocalised at the surface of cultured chondrocytes and isolated chondrons. The results suggest that type VI collagen and fibronectin may play a role in both cell-matrix adhesion and matrix-matrix cohesion in the pericellular microenvironment surrounding articular cartilage chondrocytes.
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Affiliation(s)
- J Chang
- Department of Anatomy, Faculty of Medicine and Health Sciences, University of Auckland, New Zealand.
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23
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Poole CA, Gilbert RT, Herbage D, Hartmann DJ. Immunolocalization of type IX collagen in normal and spontaneously osteoarthritic canine tibial cartilage and isolated chondrons. Osteoarthritis Cartilage 1997; 5:191-204. [PMID: 9219682 DOI: 10.1016/s1063-4584(97)80014-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE The pericellular localization of type IX collagen in avian and mammalian hyaline cartilages remains controversial, while its distribution during osteoarthritic degeneration is poorly understood. This study aimed to compare and contrast the immunohistochemical distribution of type IX collagen in normal mature and spontaneously osteoarthritic canine tibial cartilage. DESIGN Thick vibratome sectioning techniques were evaluated and compared with isolated chondrons using a range of streptavidin-linked probes in combination with light, confocal and transmission electron microscopy. RESULTS In normal intact samples, type IX collagen was concentrated in the pericellular microenvironment, while a weaker extracellular reaction around each chondron separated the territorial matrix from the unstained interterritorial matrix. Further differentiation was evident in isolated chondrons where the fibrous pericellular capsule stained more intensely than the tail and interconnecting segments between columnated chondrons. Two regions of type IX reactivity were identified in osteoarthritic tissue: an intensely stained superficial reactive region below the eroding margins, and normal deep layer cartilage where pericellular staining persists. The superficial reactive region was characterized by chondron swelling and chondrocyte cluster formation, a loss of pericellular type IX staining, and a significant increase in matrix staining between clusters. Disintegration and loss of fibrillar collagens was evident in both the swollen microenvironment and adjacent territorial matrices. CONCLUSIONS The results suggest that changes in type IX distribution, expansion of the pericellular microenvironment and chondrocyte proliferation represent key elements in the chondron remodeling and chondrocyte cluster formation associated with osteoarthritic degeneration.
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Affiliation(s)
- C A Poole
- Department of Anatomy, Faculty of Medicine and Health Sciences, University of Auckland, New Zealand
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24
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Chang J, Poole CA. Sequestration of type VI collagen in the pericellular microenvironment of adult chrondrocytes cultured in agarose. Osteoarthritis Cartilage 1996; 4:275-85. [PMID: 11048624 DOI: 10.1016/s1063-4584(05)80105-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The chondron represents the chondrocyte and its pericellular microenvironment and plays an important role in the progression of osteoarthritis. Type VI collagen is preferentially localized in the pericellular microenvironment of adult articular cartilage and increases during osteoarthritis. In this study, we characterized the pericellular sequestration of type VI collagen in long-term chondrocyte-agarose cultures, and assessed the action of interleukin-1 on type VI collagen deposition and assembly. Immunohistochemical and biochemical analysis showed that cultured chondrocytes initiate type VI collagen sequestration immediately upon plating and continue pericellular matrix sequestration in a time dependent manner. Confocal microscopy confirmed the cell surface localization and pericellular accumulation of type VI collagen, while image analysis identified a 'cargo-net like' organization of type VI collagen around each chondrocyte. Quantitative analysis revealed a primary phase of rapid cell division and low levels of type VI collagen sequestration, followed by a secondary phase of relative growth stability and high levels of type VI collagen deposition. Interleukin-1 treated cultures showed increased sequestration and retention of type VI collagen in an expanded microenvironment surrounding the chondrocytes. The data suggests a role for type VI collagen in the differentiation of the pericellular microenvironment in vitro. The increased type VI collagen sequestration promoted by interleukin-1 was consistent with previous studies on osteoarthritic cartilage, and implies a functional role for type VI collagen in the chondron remodeling associated with cartilage degradation.
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Affiliation(s)
- J Chang
- Department of Anatomy, School of Medicine, University of Auckland, New Zealand
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25
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Ali AM, Sharawy MM. An immunohistochemical study of collagen types III, VI and IX in rabbit craniomandibular joint tissues following surgical induction of anterior disk displacement. J Oral Pathol Med 1996; 25:78-85. [PMID: 8667261 DOI: 10.1111/j.1600-0714.1996.tb00197.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The purpose of this study was to determine the effect of surgical induction of anterior disk displacement (ADD) on type-III, VI and IX collagens of the rabbit craniomandibular joint (CMJ) tissues using an immunohistochemical technique. The right joint was exposed surgically, all discal attachments were severed except for the posterior discal attachment (bilaminar zone). The disk was then repositioned anteriorly and sutured to the zygomatic arch. The left joint served as a sham-operated control. Ten additional joints were used as non-operated controls. Deeply anesthetized rabbits were perfused with 2% buffered formalin 2 weeks (10 rabbits) or 6 weeks (10 rabbits) following surgery. The articular disk, bilaminar zone, mandibular condyle and articular eminence were excised. The last two were decalcified in EDTA. All tissues were then sectioned at 10 microns in a cryostat. Sections were incubated with monoclonal antibodies directed against type-III, VI or IX collagens. Following incubation in the appropriate FITC-labelled secondary antibodies, all sections were studied under the fluorescence microscope. The results showed a reduction in immunostaining for type-VI and IX collagens in the condylar cartilage, disk and articular eminence at 2 weeks, followed by an increase in their immunostaining at 6 weeks and the appearance of a de novo type-III collagen in the condylar cartilage and the articular eminence. It is concluded that surgical induction of ADD in the rabbit CMJ leads to alterations in its type-III, VI and IX collagens.
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Affiliation(s)
- A M Ali
- Department of Oral Biology, Medical College of Georgia, Augusta 30912-1122, USA
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26
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Roberts S, Caterson B, Evans H, Eisenstein SM. Proteoglycan components of the intervertebral disc and cartilage endplate: an immunolocalization study of animal and human tissues. THE HISTOCHEMICAL JOURNAL 1994; 26:402-11. [PMID: 7519184 DOI: 10.1007/bf00160052] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Monoclonal antibodies have been used to study the presence and distribution of various components of the proteoglycan molecule in the intervertebral disc and cartilage endplate. Link protein, hyaluronic acid binding region, keratan sulphate and chondroitin 4- and 6-sulphate have been investigated in tissues from humans and other mammals. Exposure of the carbohydrate and protein epitopes was enhanced by chondroitinase and trypsin pretreatment respectively. The degree of immunoreactivity varied with location, being greater in the nucleus pulposus than the annulus fibrosus with least reactivity in the cartilage endplate. In addition, there was increased staining in the pericellular domains, particularly in adult tissues. Areas of ectopic calcification exhibited very different immunoreactivity, depending on the type of calcium salt present. Calcium hydroxyapatite deposits showed greater staining for 8A4 (link protein), while calcium pyrophosphate deposits demonstrated greater staining for 3B3(-), 7D4(-) and 3D5 than the surrounding non-calcified matrix. Staining for chondroitin sulphate isomer epitopes 3B3(-) and 7D4(-), indicative of modified chondroitin sulphate chains, was greater in human tissues of degenerate than non-degenerate appearance. This suggests that expression of these epitopes may be an indicator of disease and subsequent reparative procedures in intervertebral disc and cartilage endplate, similar to that seen in articular cartilage degeneration.
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Affiliation(s)
- S Roberts
- J. P. O'Brien Laboratory, Robert Jones & Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, UK
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Karvonen RL, Fernandez-Madrid F, Lande MA, Hazlett L, Barrett R, An T, Huebner CJ. Proteoglycans from osteoarthritic human articular cartilage influence type II collagen in vitro fibrillogenesis. Connect Tissue Res 1992; 27:235-50. [PMID: 1576824 DOI: 10.3109/03008209209006999] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Collagen fibrils were formed in the presence of dermatan sulfate (DSPG) and high density (HDPG) proteoglycans isolated from human adult knee femoral articular cartilage. Eroded cartilage had a higher percentage of DSPGs in the extracted proteoglycans than normal cartilage (p = .018). The dermatan sulfate proteoglycans (DS-PGI and DS-PGII) were detected in normal and osteoarthritic cartilage. DSPGs compared to HDPG inhibited in vitro collagen fibrillogenesis producing a longer lag phase (p less than .05) and a slower rate of fibril formation (p less than .05). DSPGs from eroded osteoarthritic cartilage alone or in combination with HDPG produced a longer lag phase than DSPGs from normal cartilage alone or in combination with HDPG (p less than .05). The inhibition of fibrillogenesis by DSPGs suggests that collagen fibril formation in vivo may be abnormal due to the influence of molecular changes in proteoglycan as well as an increased proportion of DSPGs occurring in osteoarthritic cartilage. Abnormal fibril formation may produce a weakened cartilage matrix, thus contributing to an accelerated process of cartilage degeneration in osteoarthritis.
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Affiliation(s)
- R L Karvonen
- Department of Internal Medicine, Wayne State University School of Medicine, Detroit, Michigan
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28
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Roberts S, Menage J, Duance V, Wotton SF. Type III collagen in the intervertebral disc. THE HISTOCHEMICAL JOURNAL 1991; 23:503-8. [PMID: 1791157 DOI: 10.1007/bf01041176] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Several collagen types have now been isolated from the intervertebral disc, although type III collagen has previously only been extracted from human pathological disc. In this study, type III collagen has been isolated from normal human and bovine intervertebral disc and immunolocalized in sections of rat, sheep, bovine and 'normal' human intervertebral disc of various ages. Staining with antisera to type III collagen is localized primarily around the cells. Results indicate that cells of the disc sit in 'chondrons', similar to those seen in the deep and mid zones of articular cartilage. We suggest that type III collagen is present in the intervertebral disc and hypothesize that it may be involved in the organization of the pericellular environment, perhaps linking the chondron capsule to the interterritorial matrix.
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Affiliation(s)
- S Roberts
- Charles Salt Research Centre, Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, UK
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29
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Wotton SF, Jeacocke RE, Maciewicz RA, Wardale RJ, Duance VC. The application of scanning confocal microscopy in cartilage research. THE HISTOCHEMICAL JOURNAL 1991; 23:328-35. [PMID: 1783569 DOI: 10.1007/bf01044964] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Scanning confocal microscopy has been used in conjunction with immunofluorescent localization to address two areas of debate in cartilage research. With the enhanced resolution and optical sectioning capability of this new technique, we have demonstrated that type IX collagen is preferentially located in an area around the chondrocyte, even in young cartilage. We have also shown that cathepsin B production is not confined to de-differentiated chondrocytes. The advantages and versatility of scanning confocal microscopy have thus clearly been demonstrated.
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Affiliation(s)
- S F Wotton
- Muscle and Collagen Research Group, Department of Veterinary Medicine, Langford, Bristol, UK
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30
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Poole CA, Matsuoka A, Schofield JR. Chondrons from articular cartilage. III. Morphologic changes in the cellular microenvironment of chondrons isolated from osteoarthritic cartilage. ARTHRITIS AND RHEUMATISM 1991; 34:22-35. [PMID: 1984777 DOI: 10.1002/art.1780340105] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Chondrons were isolated from human and canine osteoarthritic cartilage using low-speed homogenization techniques. Changes in chondron morphology were evaluated using differential interference-contrast microscopy, phase-contrast microscopy, and histochemical and ultrastructural methods. Chondrocyte viability was assessed using fluorescein diacetate staining, and chondron metabolism was investigated using autoradiography. The results suggest that initial changes in the collagen and proteoglycan distribution within the chondron are followed by chondrocyte proliferation to form clusters. These techniques offer the potential to study cell matrix interactions in degenerative osteoarthritis.
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Affiliation(s)
- C A Poole
- Department of Surgery, University of Auckland School of Medicine, New Zealand
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31
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Ueda Y, Oda Y, Tsuchiya H, Tomita K, Nakanishi I. Immunohistological study on collagenous proteins of benign and malignant human cartilaginous tumours of bone. VIRCHOWS ARCHIV. A, PATHOLOGICAL ANATOMY AND HISTOPATHOLOGY 1990; 417:291-7. [PMID: 2122578 DOI: 10.1007/bf01605779] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The immunohistological distribution of collagen types I, II, III, V and VI in human benign and malignant cartilaginous tumours of bone was examined with regard to their aggressiveness. The matrix of enchondromas consisted of type II collagen distributed diffusely, and type VI predominantly localized in the immediate surroundings of the cells. Types I, III and V collagen were not found. These findings were similar to the distribution of collagenous proteins in normal hyaline cartilage where each lobule was consistently rimmed by types I and V collagen. In grade 1 chondrosarcomas, the main collagenous components of matrix were also types II and VI collagen. Type II was sometimes found in the cytoplasm of tumour cells and type VI tended to lose territorial localization. In addition, type I collagen was demonstrated consistently and type V in some cases. In grade 2 chondrosarcomas, type II collagen was demonstrated not only in the matrix but occasionally in the cytoplasm of tumour cells. Type VI was dispersed in the intercellular areas. The other collagenous proteins such as types I, III and V were also present in the matrix. In grade 3 chondrosarcomas, type II collagen was localized predominantly in the cytoplasm of tumour cells and in the adjacent matrix. Type VI was markedly decreased with complete loss of pericellular distribution, whereas types I, III and V were constantly present in the matrix. Those alterations in the distribution of collagen types correlated well with the aggressive behaviour of the tumours. The findings suggest that distribution of different collagen types in cartilaginous tumours reflects the immaturity of the tumour cells and is a useful indicator of their aggressiveness.
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Affiliation(s)
- Y Ueda
- Department of Pathology, School of Medicine, Kanazawa University, Ishikawa, Japan
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32
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DUANCE VICTORC, WOTTON SANDRAF, YOUNG ROBERTD. Type IX Collagen Function in Articular Cartilage. Ann N Y Acad Sci 1990. [DOI: 10.1111/j.1749-6632.1990.tb17966.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Poole CA, Honda T, Skinner SJ, Schofield JR, Hyde KF, Shinkai H. Chondrons from articular cartilage (II): Analysis of the glycosaminoglycans in the cellular microenvironment of isolated canine chondrons. Connect Tissue Res 1990; 24:319-30. [PMID: 2376132 DOI: 10.3109/03008209009152158] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A chondron rich preparation was isolated from mature canine tibial cartilage using low-speed homogenization techniques. Proteoglycans were extracted from this preparation by exhaustive treatment with 4M guanidine-HCl. A significant proportion of the total proteoglycan, measured as uronic acid, was resistant to extraction and represented 27.9% in intact cartilage chips and 18.6% in the chondron fraction. Histochemical examination of chondrons confirmed that extraction resistant proteoglycans remained within the capsule of the chondron after 4M guanidine-HCl treatment. Electrophoretic analysis of the glycosaminoglycans extracted from intact cartilage chips and the chondron fraction showed approximately equivalent amounts of chondroitin sulphate (79.3%), keratan sulphate (16.3%) and hyaluronic acid (4.3%) present. In contrast, the extraction resistant residue in the chondron fraction was significantly enriched for hyaluronic acid (10.5%, p less than 0.05) but was depleted of chondroitin sulphate (70.9%, p less than 0.05). The major chondroitin sulphate isomer in the resistant fraction was chondroitin 6-sulphate while in the soluble fraction, the quantities of the two isomers were approximately equivalent. Comparison with previously published data suggests a role for minor collagens in the retention of proteoglycans in the cellular microenvironment.
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Affiliation(s)
- C A Poole
- Department of Surgery, University of Auckland, School of Medicine, New Zealand
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Mayne R. Cartilage collagens. What is their function, and are they involved in articular disease? ARTHRITIS AND RHEUMATISM 1989; 32:241-6. [PMID: 2649109 DOI: 10.1002/anr.1780320302] [Citation(s) in RCA: 146] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- R Mayne
- University of Alabama, Birmingham Medical Center, Department of Cell Biology and Anatomy 35294
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