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Cui S, Li W, Teixeira GQ, Neidlinger‐Wilke C, Wilke H, Haglund L, Ouyang H, Richards RG, Grad S, Alini M, Li Z. Neoepitope fragments as biomarkers for different phenotypes of intervertebral disc degeneration. JOR Spine 2022; 5:e1215. [PMID: 36203866 PMCID: PMC9520770 DOI: 10.1002/jsp2.1215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 06/16/2022] [Accepted: 06/17/2022] [Indexed: 11/21/2022] Open
Abstract
Background During the intervertebral disc (IVD) degeneration process, initial degenerative events occur at the extracellular matrix level, with the appearance of neoepitope peptides formed by the cleavage of aggrecan and collagen. This study aims to elucidate the spatial and temporal alterations of aggrecan and collagen neoepitope level during IVD degeneration. Methods Bovine caudal IVDs were cultured under four different conditions to mimic different degenerative situations. Samples cultured after 1‐ or 8‐days were collected for analysis. Human IVD samples were obtained from patients diagnosed with lumbar disc herniation (LDH) or adolescent idiopathic scoliosis (AIS). After immunohistochemical (IHC) staining of Aggrecanase Cleaved C‐terminus Aggrecan Neoepitope (NB100), MMP Cleaved C‐terminus Aggrecan Neoepitope (MMPCC), Collagen Type 1α1 1/4 fragment (C1α1) and Collagenase Cleaved Type I and II Collagen Neoepitope (C1,2C), staining optical density (OD)/area in extracellular matrix (OECM) and pericellular zone (OPCZ) were analyzed. Conditioned media of the bovine IVD was collected to measure protein level of inflammatory cytokines and C1,2C. Results For the bovine IVD sections, the aggrecan MMPCC neoepitope was accumulated in nucleus pulposus (NP) and cartilage endplate (EP) regions following mechanical overload in the one strike model after long‐term culture; as for the TNF‐α induced degeneration, the OECM and OPCZ of collagen C1,2C neoepitope was significantly increased in the outer AF region after long‐term culture; moreover, the C1,2C was only detected in conditioned medium from TNF‐α injection + Degenerative loading group after 8 days of culture. LDH patients showed higher MMPCC OECM in NP and higher C1,2C OECM in AF region compared with AIS patients. Conclusions In summary, aggrecan and collagen neoepitope profiles showed degeneration induction trigger‐ and region‐specific differences in the IVD organ culture models. Different IVD degeneration types are correlated with specific neoepitope expression profiles. These neoepitopes may be helpful as biomarkers of ECM degradation in early IVD degeneration and indicators of different degeneration phenotypes.
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Affiliation(s)
- Shangbin Cui
- AO Research Institute Davos Davos Switzerland
- Guangdong Provincial Key Laboratory of Orthopedics and Traumatology The First Affiliated Hospital of Sun Yat‐Sen University Guangzhou China
| | - Wenyue Li
- AO Research Institute Davos Davos Switzerland
- Zhejiang University‐University of Edinburgh Institute (ZJU‐UoE Institute) Zhejiang University Haining China
| | - Graciosa Q. Teixeira
- Institute of Orthopedic Research and Biomechanics, Centre for Trauma Research Ulm (ZTF Ulm) Ulm University Ulm Germany
| | - Cornelia Neidlinger‐Wilke
- Institute of Orthopedic Research and Biomechanics, Centre for Trauma Research Ulm (ZTF Ulm) Ulm University Ulm Germany
| | - Hans‐Joachim Wilke
- Institute of Orthopedic Research and Biomechanics, Centre for Trauma Research Ulm (ZTF Ulm) Ulm University Ulm Germany
| | - Lisbet Haglund
- Department of Surgery and Shriners Hospital for Children McGill University Montreal Canada
| | - Hongwei Ouyang
- Zhejiang University‐University of Edinburgh Institute (ZJU‐UoE Institute) Zhejiang University Haining China
| | - R. Geoff Richards
- AO Research Institute Davos Davos Switzerland
- Guangdong Provincial Key Laboratory of Orthopedics and Traumatology The First Affiliated Hospital of Sun Yat‐Sen University Guangzhou China
| | | | - Mauro Alini
- AO Research Institute Davos Davos Switzerland
| | - Zhen Li
- AO Research Institute Davos Davos Switzerland
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Šećerović A, Ristaniemi A, Cui S, Li Z, Soubrier A, Alini M, Ferguson SJ, Weder G, Heub S, Ledroit D, Grad S. Toward the Next Generation of Spine Bioreactors: Validation of an Ex Vivo Intervertebral Disc Organ Model and Customized Specimen Holder for Multiaxial Loading. ACS Biomater Sci Eng 2022; 8:3969-3976. [PMID: 35977717 PMCID: PMC9472220 DOI: 10.1021/acsbiomaterials.2c00330] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
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A new generation of bioreactors with integrated six degrees
of
freedom (6 DOF) aims to mimic more accurately the natural intervertebral
disc (IVD) load. We developed and validated in a biological and mechanical
study a specimen holder and corresponding ex vivo IVD organ model
according to the bioreactor requirements for multiaxial loading and
a long-term IVD culture. IVD height changes and cell viability were
compared between the 6 DOF model and the standard 1 DOF model throughout
the 3 weeks of cyclic compressive loading in the uniaxial bioreactor.
Furthermore, the 6 DOF model and holder were loaded for 9 days in
the multiaxial bioreactor under development using the same conditions,
and the IVDs were evaluated for cell viability. The interface of the
IVD model and specimen holder, enhanced with fixation screws onto
the bone, was tested in compression, torsion, lateral bending, and
tension. Additionally, critical motions such as tension and bending
were assessed for a combination of side screws and top screws or side
screws and adhesive. The 6 DOF model loaded in the uniaxial bioreactor
maintained similar cell viability in the IVD regions as the 1 DOF
model. The viability was high after 2 weeks throughout the whole IVD
and reduced by more than 30% in the inner annulus fibrous after 3
weeks. Similarly, the IVDs remained highly viabile when cultured in
the multiaxial bioreactor. In both models, IVD height changes after
loading were in the range of typical physiological conditions. When
differently directed motions were applied, the holder-IVD interface
remained stable under hyper-physiological loading levels using a side
screw approach in compression and torsion and the combination of side
and top screws in tension and bending. We thus conclude that the developed
holding system is mechanically reliable and biologically compatible
for application in a new generation of multiaxial bioreactors.
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Affiliation(s)
- Amra Šećerović
- AO Research Institute Davos, Clavadelerstrasse 8, Davos 7270, Switzerland
| | - Aapo Ristaniemi
- AO Research Institute Davos, Clavadelerstrasse 8, Davos 7270, Switzerland
| | - Shangbin Cui
- AO Research Institute Davos, Clavadelerstrasse 8, Davos 7270, Switzerland.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Zhen Li
- AO Research Institute Davos, Clavadelerstrasse 8, Davos 7270, Switzerland
| | - Astrid Soubrier
- AO Research Institute Davos, Clavadelerstrasse 8, Davos 7270, Switzerland
| | - Mauro Alini
- AO Research Institute Davos, Clavadelerstrasse 8, Davos 7270, Switzerland
| | | | - Gilles Weder
- CSEM, Swiss Center for Electronics and Microtechnology, Rue Jaquet-Droz 1, Neuchatel 2002, Switzerland
| | - Sarah Heub
- CSEM, Swiss Center for Electronics and Microtechnology, Rue Jaquet-Droz 1, Neuchatel 2002, Switzerland
| | - Diane Ledroit
- CSEM, Swiss Center for Electronics and Microtechnology, Rue Jaquet-Droz 1, Neuchatel 2002, Switzerland
| | - Sibylle Grad
- AO Research Institute Davos, Clavadelerstrasse 8, Davos 7270, Switzerland
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Bermudez-Lekerika P, Crump KB, Tseranidou S, Nüesch A, Kanelis E, Alminnawi A, Baumgartner L, Muñoz-Moya E, Compte R, Gualdi F, Alexopoulos LG, Geris L, Wuertz-Kozak K, Le Maitre CL, Noailly J, Gantenbein B. Immuno-Modulatory Effects of Intervertebral Disc Cells. Front Cell Dev Biol 2022; 10:924692. [PMID: 35846355 PMCID: PMC9277224 DOI: 10.3389/fcell.2022.924692] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 05/20/2022] [Indexed: 11/29/2022] Open
Abstract
Low back pain is a highly prevalent, chronic, and costly medical condition predominantly triggered by intervertebral disc degeneration (IDD). IDD is often caused by structural and biochemical changes in intervertebral discs (IVD) that prompt a pathologic shift from an anabolic to catabolic state, affecting extracellular matrix (ECM) production, enzyme generation, cytokine and chemokine production, neurotrophic and angiogenic factor production. The IVD is an immune-privileged organ. However, during degeneration immune cells and inflammatory factors can infiltrate through defects in the cartilage endplate and annulus fibrosus fissures, further accelerating the catabolic environment. Remarkably, though, catabolic ECM disruption also occurs in the absence of immune cell infiltration, largely due to native disc cell production of catabolic enzymes and cytokines. An unbalanced metabolism could be induced by many different factors, including a harsh microenvironment, biomechanical cues, genetics, and infection. The complex, multifactorial nature of IDD brings the challenge of identifying key factors which initiate the degenerative cascade, eventually leading to back pain. These factors are often investigated through methods including animal models, 3D cell culture, bioreactors, and computational models. However, the crosstalk between the IVD, immune system, and shifted metabolism is frequently misconstrued, often with the assumption that the presence of cytokines and chemokines is synonymous to inflammation or an immune response, which is not true for the intact disc. Therefore, this review will tackle immunomodulatory and IVD cell roles in IDD, clarifying the differences between cellular involvements and implications for therapeutic development and assessing models used to explore inflammatory or catabolic IVD environments.
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Affiliation(s)
- Paola Bermudez-Lekerika
- Tissue Engineering for Orthopaedics and Mechanobiology, Bone and Joint Program, Department for BioMedical Research (DBMR), Faculty of Medicine, University of Bern, Bern, Switzerland.,Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, Medical Faculty, University of Bern, Bern, Switzerland
| | - Katherine B Crump
- Tissue Engineering for Orthopaedics and Mechanobiology, Bone and Joint Program, Department for BioMedical Research (DBMR), Faculty of Medicine, University of Bern, Bern, Switzerland.,Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, Medical Faculty, University of Bern, Bern, Switzerland
| | | | - Andrea Nüesch
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, United Kingdom
| | - Exarchos Kanelis
- ProtATonce Ltd., Athens, Greece.,School of Mechanical Engineering, National Technical University of Athens, Zografou, Greece
| | - Ahmad Alminnawi
- GIGA In Silico Medicine, University of Liège, Liège, Belgium.,Skeletal Biology and Engineering Research Center, KU Leuven, Leuven, Belgium
| | | | | | - Roger Compte
- Twin Research and Genetic Epidemiology, St Thomas' Hospital, King's College London, London, United Kingdom
| | - Francesco Gualdi
- Institut Hospital Del Mar D'Investigacions Mèdiques (IMIM), Barcelona, Spain
| | - Leonidas G Alexopoulos
- ProtATonce Ltd., Athens, Greece.,School of Mechanical Engineering, National Technical University of Athens, Zografou, Greece
| | - Liesbet Geris
- GIGA In Silico Medicine, University of Liège, Liège, Belgium.,Skeletal Biology and Engineering Research Center, KU Leuven, Leuven, Belgium.,Biomechanics Research Unit, KU Leuven, Leuven, Belgium
| | - Karin Wuertz-Kozak
- Department of Biomedical Engineering, Rochester Institute of Technology, Rochester, NY, United States.,Spine Center, Schön Klinik München Harlaching Academic Teaching Hospital and Spine Research Institute of the Paracelsus Private Medical University Salzburg (Austria), Munich, Germany
| | - Christine L Le Maitre
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, United Kingdom
| | | | - Benjamin Gantenbein
- Tissue Engineering for Orthopaedics and Mechanobiology, Bone and Joint Program, Department for BioMedical Research (DBMR), Faculty of Medicine, University of Bern, Bern, Switzerland.,Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, Medical Faculty, University of Bern, Bern, Switzerland
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Croft AS, Roth Y, Oswald KAC, Ćorluka S, Bermudez-Lekerika P, Gantenbein B. In Situ Cell Signalling of the Hippo-YAP/TAZ Pathway in Reaction to Complex Dynamic Loading in an Intervertebral Disc Organ Culture. Int J Mol Sci 2021; 22:ijms222413641. [PMID: 34948441 PMCID: PMC8707270 DOI: 10.3390/ijms222413641] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/10/2021] [Accepted: 12/13/2021] [Indexed: 12/11/2022] Open
Abstract
Recently, a dysregulation of the Hippo-YAP/TAZ pathway has been correlated with intervertebral disc (IVD) degeneration (IDD), as it plays a key role in cell survival, tissue regeneration, and mechanical stress. We aimed to investigate the influence of different mechanical loading regimes, i.e., under compression and torsion, on the induction and progression of IDD and its association with the Hippo-YAP/TAZ pathway. Therefore, bovine IVDs were assigned to one of four different static or complex dynamic loading regimes: (i) static, (ii) "low-stress", (iii) "intermediate-stress", and (iv) "high-stress" regime using a bioreactor. After one week of loading, a significant loss of relative IVD height was observed in the intermediate- and high-stress regimes. Furthermore, the high-stress regime showed a significantly lower cell viability and a significant decrease in glycosaminoglycan content in the tissue. Finally, the mechanosensitive gene CILP was significantly downregulated overall, and the Hippo-pathway gene MST1 was significantly upregulated in the high-stress regime. This study demonstrates that excessive torsion combined with compression leads to key features of IDD. However, the results indicated no clear correlation between the degree of IDD and a subsequent inactivation of the Hippo-YAP/TAZ pathway as a means of regenerating the IVD.
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Affiliation(s)
- Andreas S. Croft
- Tissue Engineering for Orthopaedics and Mechanobiology, Bone & Joint Program, Department for BioMedical Research (DBMR), Medical Faculty, University of Bern, CH-3008 Bern, Switzerland; (A.S.C.); (Y.R.); (K.A.C.O.); (S.Ć.); (P.B.-L.)
| | - Ysaline Roth
- Tissue Engineering for Orthopaedics and Mechanobiology, Bone & Joint Program, Department for BioMedical Research (DBMR), Medical Faculty, University of Bern, CH-3008 Bern, Switzerland; (A.S.C.); (Y.R.); (K.A.C.O.); (S.Ć.); (P.B.-L.)
| | - Katharina A. C. Oswald
- Tissue Engineering for Orthopaedics and Mechanobiology, Bone & Joint Program, Department for BioMedical Research (DBMR), Medical Faculty, University of Bern, CH-3008 Bern, Switzerland; (A.S.C.); (Y.R.); (K.A.C.O.); (S.Ć.); (P.B.-L.)
- Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, University of Bern, CH-3010 Bern, Switzerland
| | - Slavko Ćorluka
- Tissue Engineering for Orthopaedics and Mechanobiology, Bone & Joint Program, Department for BioMedical Research (DBMR), Medical Faculty, University of Bern, CH-3008 Bern, Switzerland; (A.S.C.); (Y.R.); (K.A.C.O.); (S.Ć.); (P.B.-L.)
- Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, University of Bern, CH-3010 Bern, Switzerland
| | - Paola Bermudez-Lekerika
- Tissue Engineering for Orthopaedics and Mechanobiology, Bone & Joint Program, Department for BioMedical Research (DBMR), Medical Faculty, University of Bern, CH-3008 Bern, Switzerland; (A.S.C.); (Y.R.); (K.A.C.O.); (S.Ć.); (P.B.-L.)
| | - Benjamin Gantenbein
- Tissue Engineering for Orthopaedics and Mechanobiology, Bone & Joint Program, Department for BioMedical Research (DBMR), Medical Faculty, University of Bern, CH-3008 Bern, Switzerland; (A.S.C.); (Y.R.); (K.A.C.O.); (S.Ć.); (P.B.-L.)
- Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, University of Bern, CH-3010 Bern, Switzerland
- Correspondence: ; Tel.: +41-31-632-88-15
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