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Hartmann B, Fleischhauer L, Nicolau M, Jensen THL, Taran FA, Clausen-Schaumann H, Reuten R. Profiling native pulmonary basement membrane stiffness using atomic force microscopy. Nat Protoc 2024:10.1038/s41596-024-00955-7. [PMID: 38429517 DOI: 10.1038/s41596-024-00955-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 11/27/2023] [Indexed: 03/03/2024]
Abstract
Mammalian cells sense and react to the mechanics of their immediate microenvironment. Therefore, the characterization of the biomechanical properties of tissues with high spatial resolution provides valuable insights into a broad variety of developmental, homeostatic and pathological processes within living organisms. The biomechanical properties of the basement membrane (BM), an extracellular matrix (ECM) substructure measuring only ∼100-400 nm across, are, among other things, pivotal to tumor progression and metastasis formation. Although the precise assignment of the Young's modulus E of such a thin ECM substructure especially in between two cell layers is still challenging, biomechanical data of the BM can provide information of eminent diagnostic potential. Here we present a detailed protocol to quantify the elastic modulus of the BM in murine and human lung tissue, which is one of the major organs prone to metastasis. This protocol describes a streamlined workflow to determine the Young's modulus E of the BM between the endothelial and epithelial cell layers shaping the alveolar wall in lung tissues using atomic force microscopy (AFM). Our step-by-step protocol provides instructions for murine and human lung tissue extraction, inflation of these tissues with cryogenic cutting medium, freezing and cryosectioning of the tissue samples, and AFM force-map recording. In addition, it guides the reader through a semi-automatic data analysis procedure to identify the pulmonary BM and extract its Young's modulus E using an in-house tailored user-friendly AFM data analysis software, the Center for Applied Tissue Engineering and Regenerative Medicine processing toolbox, which enables automatic loading of the recorded force maps, conversion of the force versus piezo-extension curves to force versus indentation curves, calculation of Young's moduli and generation of Young's modulus maps, where the pulmonary BM can be identified using a semi-automatic spatial filtering tool. The entire protocol takes 1-2 d.
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Affiliation(s)
- Bastian Hartmann
- Munich University of Applied Sciences, Center for Applied Tissue Engineering and Regenerative Medicine - CANTER, Munich, Germany
- Center for Nanoscience, Munich, Germany
| | - Lutz Fleischhauer
- Munich University of Applied Sciences, Center for Applied Tissue Engineering and Regenerative Medicine - CANTER, Munich, Germany
- Center for Nanoscience, Munich, Germany
| | - Monica Nicolau
- Experimental and Clinical Pharmacology and Toxicology, Medical Faculty, University of Freiburg, Freiburg, Germany
- Department of Obstetrics and Gynecology, Medical Center, University of Freiburg, Freiburg, Germany
| | - Thomas Hartvig Lindkær Jensen
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Pathology, Rigshospitalet, Copenhagen, Denmark
| | - Florin-Andrei Taran
- Department of Obstetrics and Gynecology, Medical Center, University of Freiburg, Freiburg, Germany
| | - Hauke Clausen-Schaumann
- Munich University of Applied Sciences, Center for Applied Tissue Engineering and Regenerative Medicine - CANTER, Munich, Germany.
- Center for Nanoscience, Munich, Germany.
| | - Raphael Reuten
- Experimental and Clinical Pharmacology and Toxicology, Medical Faculty, University of Freiburg, Freiburg, Germany.
- Department of Obstetrics and Gynecology, Medical Center, University of Freiburg, Freiburg, Germany.
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2
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Rafaeva M, Jensen ARD, Horton ER, Zornhagen KW, Strøbech JE, Fleischhauer L, Mayorca-Guiliani AE, Nielsen SR, Grønseth DS, Kuś F, Schoof EM, Arnes L, Koch M, Clausen-Schaumann H, Izzi V, Reuten R, Erler JT. Fibroblast-derived matrix models desmoplastic properties and forms a prognostic signature in cancer progression. Front Immunol 2023; 14:1154528. [PMID: 37539058 PMCID: PMC10395327 DOI: 10.3389/fimmu.2023.1154528] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 05/30/2023] [Indexed: 08/05/2023] Open
Abstract
The desmoplastic reaction observed in many cancers is a hallmark of disease progression and prognosis, particularly in breast and pancreatic cancer. Stromal-derived extracellular matrix (ECM) is significantly altered in desmoplasia, and as such plays a critical role in driving cancer progression. Using fibroblast-derived matrices (FDMs), we show that cancer cells have increased growth on cancer associated FDMs, when compared to FDMs derived from non-malignant tissue (normal) fibroblasts. We assess the changes in ECM characteristics from normal to cancer-associated stroma at the primary tumor site. Compositional, structural, and mechanical analyses reveal significant differences, with an increase in abundance of core ECM proteins, coupled with an increase in stiffness and density in cancer-associated FDMs. From compositional changes of FDM, we derived a 36-ECM protein signature, which we show matches in large part with the changes in pancreatic ductal adenocarcinoma (PDAC) tumor and metastases progression. Additionally, this signature also matches at the transcriptomic level in multiple cancer types in patients, prognostic of their survival. Together, our results show relevance of FDMs for cancer modelling and identification of desmoplastic ECM components for further mechanistic studies.
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Affiliation(s)
- Maria Rafaeva
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Adina R. D. Jensen
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Edward R. Horton
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Kamilla W. Zornhagen
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Jan E. Strøbech
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Lutz Fleischhauer
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Munich, Germany
- Center for NanoScience – CsNS, Ludwig-Maximilians-University Munich, Munich, Germany
| | | | - Sebastian R. Nielsen
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Dina S. Grønseth
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Filip Kuś
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Erwin M. Schoof
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
- The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
- Novo Nordisk Foundation Centre for Stem Cell Biology, DanStem, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Luis Arnes
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Manuel Koch
- Center for Biochemistry, Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
- Institute for Dental Research and Oral Musculoskeletal Biology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Munich, Germany
- Center for NanoScience – CsNS, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Valerio Izzi
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
- Faculty of Medicine, University of Oulu, Oulu, Finland
- Foundation for the Finnish Cancer Institute, Helsinki, Finland
| | - Raphael Reuten
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
- Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty, University of Freiburg, Freiburg, Germany
- Department of Obstetrics and Gynecology, Medical Center, University of Freiburg, Freiburg, Germany
| | - Janine T. Erler
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
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3
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Zhang J, Frank C, Byers P, Djordjevic S, Docheva D, Clausen-Schaumann H, Sudhop S, Huber HP. Dynamics of single cell femtosecond laser printing. Biomed Opt Express 2023; 14:2276-2292. [PMID: 37206114 PMCID: PMC10191647 DOI: 10.1364/boe.480286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/23/2023] [Accepted: 02/25/2023] [Indexed: 05/21/2023]
Abstract
In the present study, we investigated the dynamics of a femtosecond (fs) laser induced bio-printing with cell-free and cell-laden jets under the variation of laser pulse energy and focus depth, by using time-resolved imaging. By increasing the laser pulse energy or decreasing the focus depth thresholds for a first and second jet are exceeded and more laser pulse energy is converted to kinetic jet energy. With increasing jet velocity, the jet behavior changes from a well-defined laminar jet, to a curved jet and further to an undesired splashing jet. We quantified the observed jet forms with the dimensionless hydrodynamic Weber and Rayleigh numbers and identified the Rayleigh breakup regime as the preferred process window for single cell bioprinting. Herein, the best spatial printing resolution of 42 ± 3 µm and single cell positioning precision of 12.4 µm are reached, which is less than one single cell diameter about 15 µm.
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Affiliation(s)
- Jun Zhang
- Lasercenter, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine CANTER, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
- Center for NanoScience, University of Munich, 80799 Munich, Germany
- Department of Musculoskeletal Tissue Regeneration, Orthopaedic Hospital König-Ludwig-Haus, University of Wuerzburg, 97076 Wuerzburg, Germany
| | - Christine Frank
- Lasercenter, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
| | - Patrick Byers
- Lasercenter, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
| | - Sasa Djordjevic
- Lasercenter, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
| | - Denitsa Docheva
- Department of Musculoskeletal Tissue Regeneration, Orthopaedic Hospital König-Ludwig-Haus, University of Wuerzburg, 97076 Wuerzburg, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine CANTER, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
- Center for NanoScience, University of Munich, 80799 Munich, Germany
| | - Stefanie Sudhop
- Center for Applied Tissue Engineering and Regenerative Medicine CANTER, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
- Center for NanoScience, University of Munich, 80799 Munich, Germany
| | - Heinz P Huber
- Lasercenter, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine CANTER, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
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4
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Empere M, Wang X, Prein C, Aspberg A, Moser M, Oohashi T, Clausen-Schaumann H, Aszodi A, Alberton P. Aggrecan governs intervertebral discs development by providing critical mechanical cues of the extracellular matrix. Front Bioeng Biotechnol 2023; 11:1128587. [PMID: 36937743 PMCID: PMC10017878 DOI: 10.3389/fbioe.2023.1128587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 02/20/2023] [Indexed: 03/06/2023] Open
Abstract
Aggrecan (ACAN) is localized in the intervertebral disc (IVD) in unique compartment-specific patterns where it contributes to the tissue structure and mechanical function together with collagens. The extracellular matrix (ECM) of the IVD undergoes degenerative changes during aging, misuse or trauma, which inevitably alter the biochemical and biomechanical properties of the tissue. A deeper understanding of these processes can be achieved in genetically engineered mouse models, taking into account the multifaceted aspects of IVD development. In this study, we generated aggrecan insertion mutant mice (Acan iE5/iE5 ) by interrupting exon 5 coding for the G1 domain of ACAN, and analyzed the morphological and mechanical properties of the different IVD compartments during embryonic development. Western blotting using an antibody against the total core protein failed to detect ACAN in cartilage extracts, whereas immunohistochemistry by a G1-specific antibody showed weak signals in vertebral tissues of Acan iE5/iE5 mice. Homozygous mutant mice are perinatally lethal and characterized by short snout, cleft palate and disproportionate dwarfism. Whole-mount skeletal staining and µ-CT analysis of Acan iE5/iE5 mice at embryonic day 18.5 revealed compressed vertebral bodies with accelerated mineralization compared to wild type controls. In Acan iE5/iE5 mice, histochemical staining revealed collapsed extracellular matrix with negligible sulfated glycosaminoglycan content accompanied by a high cellular density. Collagen type II deposition was not impaired in the IVD of Acan iE5/iE5 mice, as shown by immunohistochemistry. Mutant mice developed a severe IVD phenotype with deformed nucleus pulposus and thinned cartilaginous endplates accompanied by a disrupted growth plate structure in the vertebral body. Atomic force microscopy (AFM) imaging demonstrated a denser collagen network with thinner fibrils in the mutant IVD zones compared to wild type. Nanoscale AFM indentation revealed bimodal stiffness distribution attributable to the softer proteoglycan moiety and harder collagenous fibrils of the wild type IVD ECM. In Acan iE5/iE5 mice, loss of aggrecan resulted in a marked shift of the Young's modulus to higher values in all IVD zones. In conclusion, we demonstrated that aggrecan is pivotal for the determination and maintenance of the proper stiffness of IVD and vertebral tissues, which in turn could play an essential role in providing developmental biomechanical cues.
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Affiliation(s)
- Marta Empere
- Musculoskeletal University Center Munich (MUM), Department of Orthopaedics and Trauma Surgery, Ludwig-Maximilians-University (LMU), Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany
| | - Xujia Wang
- Musculoskeletal University Center Munich (MUM), Department of Orthopaedics and Trauma Surgery, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Carina Prein
- Musculoskeletal University Center Munich (MUM), Department of Orthopaedics and Trauma Surgery, Ludwig-Maximilians-University (LMU), Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany
| | - Anders Aspberg
- Rheumatology and Molecular Skeletal Biology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Markus Moser
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Max Planck Society, Martinsried, Germany
- Institute of Experimental Hematology, School of Medicine, Technische Universität München, Munich, Germany
| | - Toshitaka Oohashi
- Department of Molecular Biology and Biochemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany
| | - Attila Aszodi
- Musculoskeletal University Center Munich (MUM), Department of Orthopaedics and Trauma Surgery, Ludwig-Maximilians-University (LMU), Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany
| | - Paolo Alberton
- Musculoskeletal University Center Munich (MUM), Department of Orthopaedics and Trauma Surgery, Ludwig-Maximilians-University (LMU), Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany
- *Correspondence: Paolo Alberton,
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5
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Dupin A, Aufinger L, Styazhkin I, Rothfischer F, Kaufmann BK, Schwarz S, Galensowske N, Clausen-Schaumann H, Simmel FC. Synthetic cell-based materials extract positional information from morphogen gradients. Sci Adv 2022; 8:eabl9228. [PMID: 35394842 PMCID: PMC8993112 DOI: 10.1126/sciadv.abl9228] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 02/17/2022] [Indexed: 05/19/2023]
Abstract
Biomaterials composed of synthetic cells have the potential to adapt and differentiate guided by physicochemical environmental cues. Inspired by biological systems in development, which extract positional information (PI) from morphogen gradients in the presence of uncertainties, we here investigate how well synthetic cells can determine their position within a multicellular structure. To calculate PI, we created and analyzed a large number of synthetic cellular assemblies composed of emulsion droplets connected via lipid bilayer membranes. These droplets contained cell-free feedback gene circuits that responded to gradients of a genetic inducer acting as a morphogen. PI is found to be limited by gene expression noise and affected by the temporal evolution of the morphogen gradient and the cell-free expression system itself. The generation of PI can be rationalized by computational modeling of the system. We scale our approach using three-dimensional printing and demonstrate morphogen-based differentiation in larger tissue-like assemblies.
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Affiliation(s)
- Aurore Dupin
- Physics Department (E14), TU Munich, 85748 Garching, Germany
| | - Lukas Aufinger
- Physics Department (E14), TU Munich, 85748 Garching, Germany
| | - Igor Styazhkin
- Physics Department (E14), TU Munich, 85748 Garching, Germany
| | | | - Benedikt K. Kaufmann
- Center for NanoScience (CeNS), Schellingstraße 4, 80799 Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
- Heinz-Nixdorf-Chair of Biomedical Electronics, TranslaTUM, TU Munich, 81675 Munich, Germany
| | - Sascha Schwarz
- Center for NanoScience (CeNS), Schellingstraße 4, 80799 Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
| | | | - Hauke Clausen-Schaumann
- Center for NanoScience (CeNS), Schellingstraße 4, 80799 Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany
| | - Friedrich C. Simmel
- Physics Department (E14), TU Munich, 85748 Garching, Germany
- Corresponding author.
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6
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Rellmann Y, Eidhof E, Hansen U, Fleischhauer L, Vogel J, Clausen-Schaumann H, Aszodi A, Dreier R. ER Stress in ERp57 Knockout Knee Joint Chondrocytes Induces Osteoarthritic Cartilage Degradation and Osteophyte Formation. Int J Mol Sci 2021; 23:ijms23010182. [PMID: 35008608 PMCID: PMC8745280 DOI: 10.3390/ijms23010182] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/14/2021] [Accepted: 12/22/2021] [Indexed: 12/14/2022] Open
Abstract
Ageing or obesity are risk factors for protein aggregation in the endoplasmic reticulum (ER) of chondrocytes. This condition is called ER stress and leads to induction of the unfolded protein response (UPR), which, depending on the stress level, restores normal cell function or initiates apoptotic cell death. Here the role of ER stress in knee osteoarthritis (OA) was evaluated. It was first tested in vitro and in vivo whether a knockout (KO) of the protein disulfide isomerase ERp57 in chondrocytes induces sufficient ER stress for such analyses. ER stress in ERp57 KO chondrocytes was confirmed by immunofluorescence, immunohistochemistry, and transmission electron microscopy. Knee joints of wildtype (WT) and cartilage-specific ERp57 KO mice (ERp57 cKO) were analyzed by indentation-type atomic force microscopy (IT-AFM), toluidine blue, and immunofluorescence/-histochemical staining. Apoptotic cell death was investigated by a TUNEL assay. Additionally, OA was induced via forced exercise on a treadmill. ER stress in chondrocytes resulted in a reduced compressive stiffness of knee cartilage. With ER stress, 18-month-old mice developed osteoarthritic cartilage degeneration with osteophyte formation in knee joints. These degenerative changes were preceded by apoptotic death in articular chondrocytes. Young mice were not susceptible to OA, even when subjected to forced exercise. This study demonstrates that ER stress induces the development of age-related knee osteoarthritis owing to a decreased protective function of the UPR in chondrocytes with increasing age, while apoptosis increases. Therefore, inhibition of ER stress appears to be an attractive therapeutic target for OA.
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Affiliation(s)
- Yvonne Rellmann
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstraße 15, 48149 Muenster, Germany; (Y.R.); (E.E.)
| | - Elco Eidhof
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstraße 15, 48149 Muenster, Germany; (Y.R.); (E.E.)
| | - Uwe Hansen
- Institute of Musculoskeletal Medicine, University Hospital Münster, Albert-Schweitzer-Campus 1, Building D3, 48149 Muenster, Germany;
| | - Lutz Fleischhauer
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (L.F.); (J.V.); (H.C.-S.)
- Center for Nanoscience-CeNS, 80335 Munich, Germany
- Department for Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, 80335 Munich, Germany;
| | - Jonas Vogel
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (L.F.); (J.V.); (H.C.-S.)
- Center for Nanoscience-CeNS, 80335 Munich, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (L.F.); (J.V.); (H.C.-S.)
- Center for Nanoscience-CeNS, 80335 Munich, Germany
| | - Attila Aszodi
- Department for Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, 80335 Munich, Germany;
| | - Rita Dreier
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstraße 15, 48149 Muenster, Germany; (Y.R.); (E.E.)
- Correspondence: ; Tel.: +49-251-8355573
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7
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Bubb K, Holzer T, Nolte JL, Krüger M, Wilson R, Schlötzer-Schrehardt U, Brinckmann J, Altmüller J, Aszodi A, Fleischhauer L, Clausen-Schaumann H, Probst K, Brachvogel B. Mitochondrial respiratory chain function promotes extracellular matrix integrity in cartilage. J Biol Chem 2021; 297:101224. [PMID: 34560099 PMCID: PMC8503590 DOI: 10.1016/j.jbc.2021.101224] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 09/13/2021] [Accepted: 09/20/2021] [Indexed: 12/18/2022] Open
Abstract
Energy metabolism and extracellular matrix (ECM) function together orchestrate and maintain tissue organization, but crosstalk between these processes is poorly understood. Here, we used single-cell RNA-Seq (scRNA-Seq) analysis to uncover the importance of the mitochondrial respiratory chain for ECM homeostasis in mature cartilage. This tissue produces large amounts of a specialized ECM to promote skeletal growth during development and maintain mobility throughout life. A combined approach of high-resolution scRNA-Seq, mass spectrometry/matrisome analysis, and atomic force microscopy was applied to mutant mice with cartilage-specific inactivation of respiratory chain function. This genetic inhibition in cartilage results in the expansion of a central area of 1-month-old mouse femur head cartilage, showing disorganized chondrocytes and increased deposition of ECM material. scRNA-Seq analysis identified a cell cluster-specific decrease in mitochondrial DNA-encoded respiratory chain genes and a unique regulation of ECM-related genes in nonarticular chondrocytes. These changes were associated with alterations in ECM composition, a shift in collagen/noncollagen protein content, and an increase of collagen crosslinking and ECM stiffness. These results demonstrate that mitochondrial respiratory chain dysfunction is a key factor that can promote ECM integrity and mechanostability in cartilage and presumably also in many other tissues.
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Affiliation(s)
- Kristina Bubb
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Medical Faculty and University Hospital Cologne, University of Cologne, Cologne, Germany; Center for Biochemistry, Medical Faculty and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Tatjana Holzer
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Medical Faculty and University Hospital Cologne, University of Cologne, Cologne, Germany; Center for Biochemistry, Medical Faculty and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Janica L Nolte
- Institute of Genetics and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Marcus Krüger
- Institute of Genetics and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Richard Wilson
- Central Science Laboratory, University of Tasmania, Hobart, Tasmania, Australia
| | - Ursula Schlötzer-Schrehardt
- Department of Ophthalmology, University Hospital Erlangen, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
| | - Jürgen Brinckmann
- Department of Dermatology, Institute of Virology and Cell Biology, University of Lübeck, Lübeck, Germany
| | - Janine Altmüller
- Cologne Center for Genomics, University of Cologne, Cologne, Germany; Berlin Institute of Health at Charité, Core Facility Genomics, Berlin, Germany; Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Attila Aszodi
- Department for Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Lutz Fleischhauer
- Department for Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, Ludwig-Maximilians-University (LMU), Munich, Germany; Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany
| | - Kristina Probst
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Medical Faculty and University Hospital Cologne, University of Cologne, Cologne, Germany; Center for Biochemistry, Medical Faculty and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Bent Brachvogel
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Medical Faculty and University Hospital Cologne, University of Cologne, Cologne, Germany; Center for Biochemistry, Medical Faculty and University Hospital Cologne, University of Cologne, Cologne, Germany.
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8
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Reuten R, Zendehroud S, Nicolau M, Fleischhauer L, Laitala A, Kiderlen S, Nikodemus D, Wullkopf L, Nielsen SR, McNeilly S, Prein C, Rafaeva M, Schoof EM, Furtwängler B, Porse BT, Kim H, Won KJ, Sudhop S, Zornhagen KW, Suhr F, Maniati E, Pearce OMT, Koch M, Oddershede LB, Van Agtmael T, Madsen CD, Mayorca-Guiliani AE, Bloch W, Netz RR, Clausen-Schaumann H, Erler JT. Basement membrane stiffness determines metastases formation. Nat Mater 2021; 20:892-903. [PMID: 33495631 DOI: 10.1038/s41563-020-00894-0] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 11/27/2020] [Indexed: 06/12/2023]
Abstract
The basement membrane (BM) is a special type of extracellular matrix and presents the major barrier cancer cells have to overcome multiple times to form metastases. Here we show that BM stiffness is a major determinant of metastases formation in several tissues and identify netrin-4 (Net4) as a key regulator of BM stiffness. Mechanistically, our biophysical and functional analyses in combination with mathematical simulations show that Net4 softens the mechanical properties of native BMs by opening laminin node complexes, decreasing cancer cell potential to transmigrate this barrier despite creating bigger pores. Our results therefore reveal that BM stiffness is dominant over pore size, and that the mechanical properties of 'normal' BMs determine metastases formation and patient survival independent of cancer-mediated alterations. Thus, identifying individual Net4 protein levels within native BMs in major metastatic organs may have the potential to define patient survival even before tumour formation. The ratio of Net4 to laminin molecules determines BM stiffness, such that the more Net4, the softer the BM, thereby decreasing cancer cell invasion activity.
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Affiliation(s)
- Raphael Reuten
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark.
| | - Sina Zendehroud
- Department of Physics, Freie Universität Berlin, Berlin, Germany
| | - Monica Nicolau
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Lutz Fleischhauer
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Munich, Germany
- Center for Nanoscience-CeNS, Munich, Germany
| | - Anu Laitala
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Stefanie Kiderlen
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Munich, Germany
- Center for Nanoscience-CeNS, Munich, Germany
| | - Denise Nikodemus
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Lena Wullkopf
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | | | - Sarah McNeilly
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Carina Prein
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Munich, Germany
- Center for Nanoscience-CeNS, Munich, Germany
- Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, University of Western Ontario, London, Ontario, Canada
| | - Maria Rafaeva
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Erwin M Schoof
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
- The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
- Novo Nordisk Foundation Center for Stem Cell Biology, DanStem, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Benjamin Furtwängler
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
- The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
- Novo Nordisk Foundation Center for Stem Cell Biology, DanStem, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Bo T Porse
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
- The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
- Novo Nordisk Foundation Center for Stem Cell Biology, DanStem, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Hyobin Kim
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
- Novo Nordisk Foundation Center for Stem Cell Biology, DanStem, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kyoung Jae Won
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
- Novo Nordisk Foundation Center for Stem Cell Biology, DanStem, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | | | - Frank Suhr
- Exercise Physiology Research Group, Department of Movement Sciences, Biomedical Sciences Group, KU Leuven, Leuven, Belgium
| | - Eleni Maniati
- Centre for Tumour Microenvironment, Barts Cancer Institute, Queen Mary University of London, London, UK
| | - Oliver M T Pearce
- Centre for Tumour Microenvironment, Barts Cancer Institute, Queen Mary University of London, London, UK
| | - Manuel Koch
- Center for Biochemistry, Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
- Institute for Dental Research and Oral Musculoskeletal Biology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | | | - Tom Van Agtmael
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Chris D Madsen
- Department of Laboratory Medicine, Division of Translational Cancer Research, Lund University, Lund, Sweden
| | | | - Wilhelm Bloch
- Institute of Cardiovascular Research and Sport Medicine, Department of Molecular and Cellular Sport Medicine, German Sport University Cologne, Cologne, Germany
| | - Roland R Netz
- Department of Physics, Freie Universität Berlin, Berlin, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Munich, Germany
- Center for Nanoscience-CeNS, Munich, Germany
| | - Janine T Erler
- Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark.
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9
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Yin H, Strunz F, Yan Z, Lu J, Brochhausen C, Kiderlen S, Clausen-Schaumann H, Wang X, Gomes ME, Alt V, Docheva D. Corrigendum to "Three-dimensional self-assembling nanofiber matrix rejuvenates aged/degenerative human tendon stem/progenitor cells" [Biomaterials 236 (2020) 119,802]. Biomaterials 2021; 269:120617. [PMID: 33445100 DOI: 10.1016/j.biomaterials.2020.120617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Heyong Yin
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany; Department of Orthopedics, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Franziska Strunz
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany
| | - Zexing Yan
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany
| | - Jiaju Lu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | | | - Stefanie Kiderlen
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany
| | - Xiumei Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Manuela E Gomes
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
| | - Volker Alt
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany
| | - Denitsa Docheva
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany.
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10
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Seifer P, Hay E, Fleischhauer L, Heilig J, Bloch W, Sonntag S, Shmerling D, Clausen-Schaumann H, Aszodi A, Niehoff A, Cohen-Solal M, Paulsson M, Wagener R, Zaucke F. The Matrilin-3 T298M mutation predisposes for post-traumatic osteoarthritis in a knock-in mouse model. Osteoarthritis Cartilage 2021; 29:78-88. [PMID: 33227438 DOI: 10.1016/j.joca.2020.09.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 09/04/2020] [Accepted: 09/29/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The human matrilin-3 T303M (in mouse T298M) mutation has been proposed to predispose for osteoarthritis, but due to the lack of an appropriate animal model this hypothesis could not be tested. This study was carried out to identify pathogenic mechanisms in a transgenic mouse line by which the mutation might contribute to disease development. METHODS A mouse line carrying the T298M point mutation in the Matn3 locus was generated and features of skeletal development in ageing animals were characterized by immunohistology, micro computed tomography, transmission electron microscopy and atomic force microscopy. The effect of transgenic matrilin-3 was also studied after surgically induced osteoarthritis. RESULTS The matrilin-3 T298M mutation influences endochondral ossification and leads to larger cartilage collagen fibril diameters. This in turn leads to an increased compressive stiffness of the articular cartilage, which, upon challenge, aggravates osteoarthritis development. CONCLUSIONS The mouse matrilin-3 T298M mutation causes a predisposition for post-traumatic osteoarthritis and the corresponding knock-in mouse line therefore represents a valid model for investigating the pathogenic mechanisms involved in osteoarthritis development.
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Affiliation(s)
- P Seifer
- Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany
| | - E Hay
- Inserm UMR1132 and Paris Diderot University, Paris, France
| | - L Fleischhauer
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany; Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - J Heilig
- Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany; Cologne Center for Musculoskeletal Biomechanics (CCMB), Medical Faculty, University of Cologne, Cologne, Germany
| | - W Bloch
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiology and Sports Medicine, German Sport University Cologne, Cologne, Germany
| | - S Sonntag
- ETH Phenomics Center (EPIC), Zurich, Switzerland
| | | | - H Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany
| | - A Aszodi
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany; Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - A Niehoff
- Cologne Center for Musculoskeletal Biomechanics (CCMB), Medical Faculty, University of Cologne, Cologne, Germany; Institute of Biomechanics and Orthopaedics, German Sport University Cologne, Cologne, Germany
| | - M Cohen-Solal
- Inserm UMR1132 and Paris Diderot University, Paris, France
| | - M Paulsson
- Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany
| | - R Wagener
- Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany
| | - F Zaucke
- Dr. Rolf M. Schwiete Research Unit for Osteoarthritis, Orthopedic University Hospital Friedrichsheim GGmbH, Frankfurt Am Main, Germany.
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11
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Westermann LM, Fleischhauer L, Vogel J, Jenei-Lanzl Z, Ludwig NF, Schau L, Morellini F, Baranowsky A, Yorgan TA, Di Lorenzo G, Schweizer M, de Souza Pinheiro B, Guarany NR, Sperb-Ludwig F, Visioli F, Oliveira Silva T, Soul J, Hendrickx G, Wiegert JS, Schwartz IVD, Clausen-Schaumann H, Zaucke F, Schinke T, Pohl S, Danyukova T. Imbalanced cellular metabolism compromises cartilage homeostasis and joint function in a mouse model of mucolipidosis type III gamma. Dis Model Mech 2020; 13:dmm046425. [PMID: 33023972 PMCID: PMC7687858 DOI: 10.1242/dmm.046425] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 09/15/2020] [Indexed: 11/23/2022] Open
Abstract
Mucolipidosis type III (MLIII) gamma is a rare inherited lysosomal storage disorder caused by mutations in GNPTG encoding the γ-subunit of GlcNAc-1-phosphotransferase, the key enzyme ensuring proper intracellular location of multiple lysosomal enzymes. Patients with MLIII gamma typically present with osteoarthritis and joint stiffness, suggesting cartilage involvement. Using Gnptg knockout (Gnptgko ) mice as a model of the human disease, we showed that missorting of a number of lysosomal enzymes is associated with intracellular accumulation of chondroitin sulfate in Gnptgko chondrocytes and their impaired differentiation, as well as with altered microstructure of the cartilage extracellular matrix (ECM). We also demonstrated distinct functional and structural properties of the Achilles tendons isolated from Gnptgko and Gnptab knock-in (Gnptabki ) mice, the latter displaying a more severe phenotype resembling mucolipidosis type II (MLII) in humans. Together with comparative analyses of joint mobility in MLII and MLIII patients, these findings provide a basis for better understanding of the molecular reasons leading to joint pathology in these patients. Our data suggest that lack of GlcNAc-1-phosphotransferase activity due to defects in the γ-subunit causes structural changes within the ECM of connective and mechanosensitive tissues, such as cartilage and tendon, and eventually results in functional joint abnormalities typically observed in MLIII gamma patients. This idea was supported by a deficit of the limb motor function in Gnptgko mice challenged on a rotarod under fatigue-associated conditions, suggesting that the impaired motor performance of Gnptgko mice was caused by fatigue and/or pain at the joint.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Lena Marie Westermann
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Lutz Fleischhauer
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine (Canter), University of Applied Sciences, 80533 Munich, Germany
| | - Jonas Vogel
- Center for Applied Tissue Engineering and Regenerative Medicine (Canter), University of Applied Sciences, 80533 Munich, Germany
| | - Zsuzsa Jenei-Lanzl
- Dr. Rolf M. Schwiete Research Unit for Osteoarthritis, Orthopedic University Hospital Friedrichsheim gGmbH, 60528 Frankfurt/Main, Germany
| | - Nataniel Floriano Ludwig
- Post-Graduate Program in Genetics and Molecular Biology, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Brazil
| | - Lynn Schau
- RG Behavioral Biology, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Fabio Morellini
- RG Behavioral Biology, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Anke Baranowsky
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Timur A Yorgan
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Giorgia Di Lorenzo
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Michaela Schweizer
- Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Bruna de Souza Pinheiro
- Department of Genetics, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Brazil
| | - Nicole Ruas Guarany
- Occupational Therapy Faculty, Federal University of Pelotas, 96010-610 Pelotas, Brazil
| | - Fernanda Sperb-Ludwig
- Department of Genetics, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Brazil
| | - Fernanda Visioli
- Pathology Department, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Brazil
| | - Thiago Oliveira Silva
- Post-Graduate Program in Medicine: Medical Sciences, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Brazil
| | - Jamie Soul
- Skeletal Research Group, Biosciences Institute, Newcastle University, Newcastle upon Tyne NE1 3BZ, UK
| | - Gretl Hendrickx
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - J Simon Wiegert
- RG Synaptic Wiring and Information Processing, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Ida V D Schwartz
- Department of Genetics, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Brazil
- Post-Graduate Program in Medicine: Medical Sciences, Federal University of Rio Grande do Sul, 90040-060 Porto Alegre, Brazil
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine (Canter), University of Applied Sciences, 80533 Munich, Germany
| | - Frank Zaucke
- Dr. Rolf M. Schwiete Research Unit for Osteoarthritis, Orthopedic University Hospital Friedrichsheim gGmbH, 60528 Frankfurt/Main, Germany
| | - Thorsten Schinke
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Sandra Pohl
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Tatyana Danyukova
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
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12
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Hartmann B, Marchi G, Alberton P, Farkas Z, Aszodi A, Roths J, Clausen-Schaumann H. Early Detection of Cartilage Degeneration: A Comparison of Histology, Fiber Bragg Grating-Based Micro-Indentation, and Atomic Force Microscopy-Based Nano-Indentation. Int J Mol Sci 2020; 21:ijms21197384. [PMID: 33036285 PMCID: PMC7582717 DOI: 10.3390/ijms21197384] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/29/2020] [Accepted: 10/04/2020] [Indexed: 12/27/2022] Open
Abstract
We have determined the sensitivity and detection limit of a new fiber Bragg grating (FBG)-based optoelectronic micro-indenter for biomechanical testing of cartilage and compared the results to indentation-type atomic force microscopy (IT-AFM) and histological staining. As test samples, we used bovine articular cartilage, which was enzymatically degraded ex vivo for five minutes using different concentrations of collagenase (5, 50, 100 and 500 µg/mL) to mimic moderate extracellular matrix deterioration seen in early-stage osteoarthritis (OA). Picrosirius Red staining and polarization microscopy demonstrated gradual, concentration-dependent disorganization of the collagen fibrillar network in the superficial zone of the explants. Osteoarthritis Research Society International (OARSI) grading of histopathological changes did not discriminate between undigested and enzymatically degraded explants. IT-AFM was the most sensitive method for detecting minute changes in cartilage biomechanics induced by the lowest collagenase concentration, however, it did not distinguish different levels of cartilage degeneration for collagenase concentrations higher than 5 µg/mL. The FBG micro-indenter provided a better and more precise assessment of the level of cartilage degeneration than the OARSI histological grading system but it was less sensitive at detecting mechanical changes than IT-AFM. The FBG-sensor allowed us to observe differences in cartilage biomechanics for collagenase concentrations of 100 and 500 µg/mL. Our results confirm that the FBG sensor is capable of detecting small changes in articular cartilage stiffness, which may be associated with initial cartilage degeneration caused by early OA.
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Affiliation(s)
- Bastian Hartmann
- Center for Applied Tissue Engineering and Regenerative Medicine–CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (B.H.); (A.A.)
- Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Clinic for General, Trauma and Reconstructive Surgery, University of Munich, 82152 Planegg, Germany; (P.A.); (Z.F.)
- Center for Nanoscience (CeNS), University of Munich, 80331 Munich, Germany
| | - Gabriele Marchi
- Photonics Laboratory, Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, 80335 Munich, Germany; (G.M.); (J.R.)
| | - Paolo Alberton
- Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Clinic for General, Trauma and Reconstructive Surgery, University of Munich, 82152 Planegg, Germany; (P.A.); (Z.F.)
| | - Zsuzsanna Farkas
- Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Clinic for General, Trauma and Reconstructive Surgery, University of Munich, 82152 Planegg, Germany; (P.A.); (Z.F.)
| | - Attila Aszodi
- Center for Applied Tissue Engineering and Regenerative Medicine–CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (B.H.); (A.A.)
- Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Clinic for General, Trauma and Reconstructive Surgery, University of Munich, 82152 Planegg, Germany; (P.A.); (Z.F.)
| | - Johannes Roths
- Photonics Laboratory, Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, 80335 Munich, Germany; (G.M.); (J.R.)
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine–CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (B.H.); (A.A.)
- Center for Nanoscience (CeNS), University of Munich, 80331 Munich, Germany
- Correspondence: ; Tel.: +49-89-1265-1682
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13
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Sariisik E, Zistl D, Docheva D, Schilling AF, Benoit M, Sudhop S, Clausen-Schaumann H. Inadequate tissue mineralization promotes cancer cell attachment. PLoS One 2020; 15:e0237116. [PMID: 32857787 PMCID: PMC7454967 DOI: 10.1371/journal.pone.0237116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/20/2020] [Indexed: 01/13/2023] Open
Abstract
Bone metastases are a frequent complication in prostate cancer, and several studies have shown that vitamin D deficiency promotes bone metastases. However, while many studies focus on vitamin D’s role in cell metabolism, the effect of chronically low vitamin D levels on bone tissue, i.e. insufficient mineralization of the tissue, has largely been ignored. To investigate, whether poor tissue mineralization promotes cancer cell attachment, we used a fluorescence based adhesion assay and single cell force spectroscopy to quantify the adhesion of two prostate cancer cell lines to well-mineralized and demineralized dentin, serving as biomimetic bone model system. Adhesion rates of bone metastases-derived PC3 cells increased significantly on demineralized dentin. Additionally, on mineralized dentin, PC3 cells adhered mainly via membrane anchored surface receptors, while on demineralized dentin, they adhered via cytoskeleton-anchored transmembrane receptors, pointing to an interaction via exposed collagen fibrils. The adhesion rate of lymph node derived LNCaP cells on the other hand is significantly lower than that of PC3 and not predominately mediated by cytoskeleton-linked receptors. This indicates that poor tissue mineralization facilitates the adhesion of invasive cancer cells by the exposure of collagen and emphasizes the disease modifying effect of sufficient vitamin D for cancer patients.
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Affiliation(s)
- Ediz Sariisik
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich University of Applied Sciences, Munich, Germany
- Chair of Applied Physics, Ludwig-Maximilians-Universität, Munich, Germany
- Center for NanoScience, Ludwig-Maximilians-Universität, Munich, Germany
| | - Domenik Zistl
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich University of Applied Sciences, Munich, Germany
| | - Denitsa Docheva
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich University of Applied Sciences, Munich, Germany
- Department of Trauma Surgery, Experimental Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany
| | - Arndt F. Schilling
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich University of Applied Sciences, Munich, Germany
- Clinic for Trauma Surgery, Orthopaedics, and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany
| | - Martin Benoit
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich University of Applied Sciences, Munich, Germany
- Chair of Applied Physics, Ludwig-Maximilians-Universität, Munich, Germany
- Center for NanoScience, Ludwig-Maximilians-Universität, Munich, Germany
| | - Stefanie Sudhop
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich University of Applied Sciences, Munich, Germany
- Center for NanoScience, Ludwig-Maximilians-Universität, Munich, Germany
- * E-mail:
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich University of Applied Sciences, Munich, Germany
- Center for NanoScience, Ludwig-Maximilians-Universität, Munich, Germany
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14
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Reiprich S, Hofbauer E, Kiderlen S, Clausen-Schaumann H, Böcker W, Aszódi A, Schönitzer V. Adhesive Properties of the Hyaluronan Pericellular Coat in Hyaluronan Synthases Overexpressing Mesenchymal Stem Cells. Int J Mol Sci 2020; 21:ijms21113827. [PMID: 32481561 PMCID: PMC7312511 DOI: 10.3390/ijms21113827] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 05/26/2020] [Indexed: 12/24/2022] Open
Abstract
Hyaluronan (HA), a natural component of the extracellular matrix, is supposed to have a regulatory function in the stem cell niche. Bone marrow-derived human mesenchymal stem cells (hMSCs) are known to express all three hyaluronan synthases (HASes), which are responsible for HA production. HA is extruded into the extracellular matrix, but also stays bound to the plasma membrane forming a pericellular coat, which plays a key role during early cell adhesion. Since HAS isoenzymes, HAS1, HAS2 and HAS3, produce HA with different molecular weights, a difference in their role for cell adhesion is expected. Here, we transduced the immortalized hMSC cell line SCP1 to constitutively express eGFP-tagged HASes (SCP1-HAS-eGFP) by lentiviral gene transfer. The overexpression of the HAS-eGFP was shown on RNA and protein levels, HA was determined by ELISA and the stained HA-coat was analyzed using confocal microscopy. Time-lapse microscopy, spreading assay and single cell force spectroscopy using atomic force microscopy were applied to characterize adhesion of the different HAS transduced SCP1 cells. We showed in this study that HAS3 overexpressing cells formed the thickest pericellular coat compared with control or HAS1 and HAS2 transduced cells. Furthermore, SCP1-HAS3-eGFP displayed faster and stronger adhesion compared to cells overexpressing the other synthases or control cells. We conclude that overexpression of HASes in hMSCs differentially modulates their initial adhesive interactions with the substrate. This observation might be helpful in regenerative medicine goals.
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Affiliation(s)
- Sebastian Reiprich
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (S.R.); (E.H.); (W.B.); (A.A.)
| | - Eva Hofbauer
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (S.R.); (E.H.); (W.B.); (A.A.)
| | - Stefanie Kiderlen
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany; (S.K.); (H.C.-S.)
- Center for NanoScience, Ludwig-Maximilians-University, 80799 Munich, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany; (S.K.); (H.C.-S.)
- Center for NanoScience, Ludwig-Maximilians-University, 80799 Munich, Germany
| | - Wolfgang Böcker
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (S.R.); (E.H.); (W.B.); (A.A.)
| | - Attila Aszódi
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (S.R.); (E.H.); (W.B.); (A.A.)
| | - Veronika Schönitzer
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (S.R.); (E.H.); (W.B.); (A.A.)
- Correspondence: ; Tel.: +49-89-4400-53147
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15
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Grünherz L, Prein C, Winkler T, Kirsch M, Hopfner U, Streichert T, Clausen-Schaumann H, Zustin J, Kirchhof K, Morlock MM, Machens HG, Schilling AF. Osteoidosis leads to altered differentiation and function of osteoclasts. J Cell Mol Med 2020; 24:5665-5674. [PMID: 32283567 PMCID: PMC7214153 DOI: 10.1111/jcmm.15227] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 01/28/2020] [Accepted: 01/29/2020] [Indexed: 12/14/2022] Open
Abstract
In patients with osteomalacia, a defect in bone mineralization leads to changed characteristics of the bone surface. Considering that the properties of the surrounding matrix influence function and differentiation of cells, we aimed to investigate the effect of osteoidosis on differentiation and function of osteoclasts. Based on osteomalacic bone biopsies, a model for osteoidosis in vitro (OIV) was established. Peripheral blood mononuclear cells were differentiated to osteoclasts on mineralized surfaces (MS) as internal control and on OIV. We observed a significantly reduced number of osteoclasts and surface resorption on OIV. Atomic force microscopy revealed a significant effect of the altered degree of mineralization on surface mechanics and an unmasking of collagen fibres on the surface. Indeed, coating of MS with RGD peptides mimicked the resorption phenotype observed in OIV, suggesting that the altered differentiation of osteoclasts on OIV might be associated with an interaction of the cells with amino acid sequences of unmasked extracellular matrix proteins containing RGD sequences. Transcriptome analysis uncovered a strong significant up‐regulation of transmembrane glycoprotein TROP2 in osteoclastic cultures on OIV. TROP2 expression on OIV was also confirmed on the protein level and found on the bone surface of patients with osteomalacia. Taken together, our results show a direct influence of the mineralization state of the extracellular matrix surface on differentiation and function of osteoclasts on this surface which may be important for the pathophysiology of osteomalacia and other bone disorders with changed ratio of osteoid to bone.
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Affiliation(s)
- Lisanne Grünherz
- Experimental Plastic Surgery, Clinic for Plastic and Hand Surgery, Technische Universität München, Munich, Germany.,Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich, Germany
| | - Carina Prein
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich, Germany.,Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Munich, Germany
| | - Thomas Winkler
- Institute of Biomechanics, Technische Universität Hamburg-Harburg, Hamburg, Germany
| | - Manuela Kirsch
- Experimental Plastic Surgery, Clinic for Plastic and Hand Surgery, Technische Universität München, Munich, Germany
| | - Ursula Hopfner
- Experimental Plastic Surgery, Clinic for Plastic and Hand Surgery, Technische Universität München, Munich, Germany
| | - Thomas Streichert
- Department of Clinical Chemistry, University Hospital of Cologne, Cologne, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich, Germany.,Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Munich, Germany
| | - Jozef Zustin
- Gerhard Domagk Institute of Pathology, University Medical Center Muenster, Muenster, Germany
| | | | - Michael M Morlock
- Institute of Biomechanics, Technische Universität Hamburg-Harburg, Hamburg, Germany
| | - Hans-Günter Machens
- Experimental Plastic Surgery, Clinic for Plastic and Hand Surgery, Technische Universität München, Munich, Germany
| | - Arndt Friedrich Schilling
- Experimental Plastic Surgery, Clinic for Plastic and Hand Surgery, Technische Universität München, Munich, Germany.,Department of Trauma Surgery, Orthopedic Surgery and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany
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16
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Muschter D, Fleischhauer L, Taheri S, Schilling AF, Clausen-Schaumann H, Grässel S. Sensory neuropeptides are required for bone and cartilage homeostasis in a murine destabilization-induced osteoarthritis model. Bone 2020; 133:115181. [PMID: 31926346 DOI: 10.1016/j.bone.2019.115181] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 11/13/2019] [Accepted: 11/28/2019] [Indexed: 12/16/2022]
Abstract
Numerous studies identified a role for the sensory neuropeptides substance P (SP) and alpha calcitonin gene-related peptide (αCGRP) in osteoarthritis (OA) pain behavior. Surprisingly, little attention has been paid on how their trophic effects on cartilage and bone cells might affect structural changes of bone and cartilage in OA pathology. Here, we sought to elucidate sensory neuropeptides influence on structural alterations of bone and cartilage during murine OA pathophysiology. OA was induced by destabilization of the medial meniscus (DMM) in the right knee joint of 12 weeks old male C57Bl/6J wildtype (WT) mice and mice either deficient for SP (tachykinin 1 (Tac1)-/-) or αCGRP. By OARSI histopathological grading we observed significant cartilage matrix degradation after DMM surgery in αCGRP-deficient mice after 4 weeks whereas Tac1-/- scores were not different to sham mice before 12 weeks after surgery. Indentation-type atomic force microscopy (IT-AFM) identified a strong superficial zone (SZ) cartilage phenotype in Tac1-/- Sham mice. Opposed to WT and αCGRP-/- mice, SZ cartilage of Tac1-/- mice softened 2 weeks after OA induction. In Tac1-/- DMM mice, bone volume to total volume ratio (BV/TV) increased significantly compared to the Tac1-/- Sham group, 2 weeks after surgery. WT mice had reduced BV/TV compared to αCGRP-/- and Tac1-/- mice after 12 weeks. Increased calcified cartilage thickness and medial condyle diameter were detected in the medial tibia of all groups 8 weeks after OA induction by nanoCT analysis. Meniscal ossification occurred in all OA groups, but was significantly stronger in the absence of neuropeptides. Increased serum concentration of the respective non-deleted neuropeptide was observed in both neuropeptide-deficient mice strains. Both neuropeptides protect from age-related bone structural changes under physiological conditions and SP additionally demonstrates an anabolic effect on bone structure preservation in a pathophysiological situation. Both neuropeptide deficient mice display an intrinsic structural cartilage matrix phenotype that might alter progression of cartilage degeneration in OA.
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Affiliation(s)
- Dominique Muschter
- Dept. of Orthopaedic Surgery, Experimental Orthopaedics, Centre for Medical Biotechnology (ZMB), Bio Park 1, University of Regensburg, Germany.
| | - Lutz Fleischhauer
- Department of Applied Sciences and Mechatronics, University of Applied Sciences Munich, Germany; Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians-University, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany.
| | - Shahed Taheri
- Department of Trauma Surgery, Orthopedics and Plastic Surgery, University Medicine Göttingen.
| | - Arndt F Schilling
- Department of Trauma Surgery, Orthopedics and Plastic Surgery, University Medicine Göttingen.
| | - Hauke Clausen-Schaumann
- Department of Applied Sciences and Mechatronics, University of Applied Sciences Munich, Germany.
| | - Susanne Grässel
- Dept. of Orthopaedic Surgery, Experimental Orthopaedics, Centre for Medical Biotechnology (ZMB), Bio Park 1, University of Regensburg, Germany.
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17
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Yin H, Strunz F, Yan Z, Lu J, Brochhausen C, Kiderlen S, Clausen-Schaumann H, Wang X, Gomes ME, Alt V, Docheva D. Three-dimensional self-assembling nanofiber matrix rejuvenates aged/degenerative human tendon stem/progenitor cells. Biomaterials 2020; 236:119802. [PMID: 32014804 DOI: 10.1016/j.biomaterials.2020.119802] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 01/14/2020] [Accepted: 01/18/2020] [Indexed: 12/29/2022]
Abstract
The poor healing capacity of tendons is known to worsen in the elderly. During tendon aging and degeneration, endogenous human tendon stem/progenitor cells (hTSPCs) experience profound pathological changes. Here, we explored a rejuvenation strategy for hTSPCs derived from aged/degenerated Achilles tendons (A-TSPCs) by providing three-dimensional (3D) nanofiber hydrogels and comparing them to young/healthy TSPCs (Y-TSPCs). RADA peptide hydrogel has a self-assembling ability, forms a nanofibrous 3D niche and can be further functionalized by adding RGD motifs. Cell survival, apoptosis, and proliferation assays demonstrated that RADA and RADA/RGD hydrogels support A-TSPCs in a comparable manner to Y-TSPCs. Moreover, they rejuvenated A-TSPCs to a phenotype similar to that of Y-TSPCs, as evidenced by restored cell morphology and cytoskeletal architecture. Transmission electron, confocal laser scanning and atomic force microscopies demonstrated comparable ultrastructure, surface roughness and elastic modulus of A- and Y-TSPC-loaded hydrogels. Lastly, quantitative PCR revealed similar expression profiles, as well a significant upregulation of genes related to tenogenesis and multipotency. Taken together, the RADA-based hydrogels exert a rejuvenating effect by recapitulating in vitro specific features of the natural microenvironment of human TSPCs, which strongly indicates their potential to direct cell behaviour and overcome the challenge of cell aging and degeneration in tendon repair.
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Affiliation(s)
- Heyong Yin
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany; Department of Orthopedics, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
| | - Franziska Strunz
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany.
| | - Zexing Yan
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany.
| | - Jiaju Lu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China.
| | | | - Stefanie Kiderlen
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany.
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany.
| | - Xiumei Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China.
| | - Manuela E Gomes
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal.
| | - Volker Alt
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany.
| | - Denitsa Docheva
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany.
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18
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Li P, Fleischhauer L, Nicolae C, Prein C, Farkas Z, Saller MM, Prall WC, Wagener R, Heilig J, Niehoff A, Clausen-Schaumann H, Alberton P, Aszodi A. Mice Lacking the Matrilin Family of Extracellular Matrix Proteins Develop Mild Skeletal Abnormalities and Are Susceptible to Age-Associated Osteoarthritis. Int J Mol Sci 2020; 21:ijms21020666. [PMID: 31963938 PMCID: PMC7013758 DOI: 10.3390/ijms21020666] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 01/10/2020] [Accepted: 01/15/2020] [Indexed: 12/14/2022] Open
Abstract
Matrilins (MATN1, MATN2, MATN3 and MATN4) are adaptor proteins of the cartilage extracellular matrix (ECM), which bridge the collagen II and proteoglycan networks. In humans, dominant-negative mutations in MATN3 lead to various forms of mild chondrodysplasias. However, single or double matrilin knockout mice generated previously in our laboratory do not show an overt skeletal phenotype, suggesting compensation among the matrilin family members. The aim of our study was to establish a mouse line, which lacks all four matrilins and analyze the consequence of matrilin deficiency on endochondral bone formation and cartilage function. Matn1-4−/− mice were viable and fertile, and showed a lumbosacral transition phenotype characterized by the sacralization of the sixth lumbar vertebra. The development of the appendicular skeleton, the structure of the growth plate, chondrocyte differentiation, proliferation, and survival were normal in mutant mice. Biochemical analysis of knee cartilage demonstrated moderate alterations in the extractability of the binding partners of matrilins in Matn1-4−/− mice. Atomic force microscopy (AFM) revealed comparable compressive stiffness but higher collagen fiber diameters in the growth plate cartilage of quadruple mutant compared to wild-type mice. Importantly, Matn1-4−/− mice developed more severe spontaneous osteoarthritis at the age of 18 months, which was accompanied by changes in the biomechanical properties of the articular cartilage. Interestingly, Matn4−/− mice also developed age-associated osteoarthritis suggesting a crucial role of MATN4 in maintaining the stability of the articular cartilage. Collectively, our data provide evidence that matrilins are important to protect articular cartilage from deterioration and are involved in the specification of the vertebral column.
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Affiliation(s)
- Ping Li
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
| | - Lutz Fleischhauer
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany;
- Center for NanoScience, Ludwig-Maximilians University Munich, 80799 Munich, Germany
| | - Claudia Nicolae
- Department of Molecular Medicine, Max Planck Institute for Biochemistry, 82152 Martinsried, Germany;
| | - Carina Prein
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany;
| | - Zsuzsanna Farkas
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
| | - Maximilian Michael Saller
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
| | - Wolf Christian Prall
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
| | - Raimund Wagener
- Center for Molecular Medicine, University of Cologne, 50923 Cologne, Germany;
- Center for Biochemistry, Faculty of Medicine, University of Cologne, 50931 Cologne, Germany;
| | - Juliane Heilig
- Center for Biochemistry, Faculty of Medicine, University of Cologne, 50931 Cologne, Germany;
- Cologne Center for Musculoskeletal Biomechanics, Faculty of Medicine and University Hospital of Cologne, 50931 Cologne, Germany;
| | - Anja Niehoff
- Cologne Center for Musculoskeletal Biomechanics, Faculty of Medicine and University Hospital of Cologne, 50931 Cologne, Germany;
- Institute of Biomechanics and Orthopaedics, German Sport University Cologne, 50933 Cologne, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany;
- Center for NanoScience, Ludwig-Maximilians University Munich, 80799 Munich, Germany
| | - Paolo Alberton
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
| | - Attila Aszodi
- Experimental Surgery and Regenerative Medicine (ExperiMed), Department of General, Trauma and Reconstructive Surgery, Munich University Hospital, Ludwig-Maximilians-University, 80336 Munich, Germany; (P.L.); (L.F.); (C.P.); (Z.F.); (M.M.S.); (W.C.P.); (P.A.)
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany;
- Correspondence: ; Tel.: +49-89-4400-55481
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19
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Schmid J, Schwarz S, Meier-Staude R, Sudhop S, Clausen-Schaumann H, Schieker M, Huber R. A Perfusion Bioreactor System for Cell Seeding and Oxygen-Controlled Cultivation of Three-Dimensional Cell Cultures. Tissue Eng Part C Methods 2019; 24:585-595. [PMID: 30234443 PMCID: PMC6208160 DOI: 10.1089/ten.tec.2018.0204] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Bioreactor systems facilitate three-dimensional (3D) cell culture by coping with limitations of static cultivation techniques. To allow for the investigation of proper cultivation conditions and the reproducible generation of tissue-engineered grafts, a bioreactor system, which comprises the control of crucial cultivation parameters in independent-operating parallel bioreactors, is beneficial. Furthermore, the use of a bioreactor as an automated cell seeding tool enables even cell distributions on stable scaffolds. In this study, we developed a perfusion microbioreactor system, which enables the cultivation of 3D cell cultures in an oxygen-controlled environment in up to four independent-operating bioreactors. Therefore, perfusion microbioreactors were designed with the help of computer-aided design, and manufactured using the 3D printing technologies stereolithography and fused deposition modeling. A uniform flow distribution in the microbioreactor was shown using a computational fluid dynamics model. For oxygen measurements, microsensors were integrated in the bioreactors to measure the oxygen concentration (OC) in the geometric center of the 3D cell cultures. To control the OC in each bioreactor independently, an automated feedback loop was developed, which adjusts the perfusion velocity according to the oxygen sensor signal. Furthermore, an automated cell seeding protocol was implemented to facilitate the even distribution of cells within a stable scaffold in a reproducible way. As proof of concept, the human mesenchymal stem cell line SCP-1 was seeded on bovine cancellous bone matrix of 1 cm3 and cultivated in the developed microbioreactor system at different oxygen levels. The oxygen control was capable to maintain preset oxygen levels ±0.5% over a cultivation period of several days. Using the automated cell seeding procedure resulted in evenly distributed cells within a stable scaffold. In summary, the developed microbioreactor system enables the cultivation of 3D cell cultures in an automated and thus reproducible way by providing up to four independently operating, oxygen-controlled bioreactors. In combination with the automated cell seeding procedure, the bioreactor system opens up new possibilities to conduct more reproducible experiments to investigate optimal cultivation parameters and to generate tissue-engineering grafts in an oxygen-controlled environment.
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Affiliation(s)
- Jakob Schmid
- 1 Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), University of Applied Sciences Munich , Munich, Germany .,2 Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Ludwig-Maximilians University Munich , Munich, Germany .,3 Department of Industrial Engineering and Management, University of Applied Sciences Munich , Munich, Germany
| | - Sascha Schwarz
- 1 Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), University of Applied Sciences Munich , Munich, Germany .,4 Department of Mechanical Engineering, Technical University Munich , Garching, Germany
| | - Robert Meier-Staude
- 3 Department of Industrial Engineering and Management, University of Applied Sciences Munich , Munich, Germany
| | - Stefanie Sudhop
- 1 Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), University of Applied Sciences Munich , Munich, Germany .,5 Center for Nanoscience (CeNS), Ludwig-Maximilians University Munich , Munich, Germany
| | - Hauke Clausen-Schaumann
- 1 Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), University of Applied Sciences Munich , Munich, Germany .,5 Center for Nanoscience (CeNS), Ludwig-Maximilians University Munich , Munich, Germany
| | - Matthias Schieker
- 2 Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Ludwig-Maximilians University Munich , Munich, Germany
| | - Robert Huber
- 1 Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), University of Applied Sciences Munich , Munich, Germany .,3 Department of Industrial Engineering and Management, University of Applied Sciences Munich , Munich, Germany
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20
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Schmid J, Schwarz S, Fischer M, Sudhop S, Clausen-Schaumann H, Schieker M, Huber R. A laser-cutting-based manufacturing process for the generation of three-dimensional scaffolds for tissue engineering using Polycaprolactone/Hydroxyapatite composite polymer. J Tissue Eng 2019; 10:2041731419859157. [PMID: 31384416 PMCID: PMC6651657 DOI: 10.1177/2041731419859157] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 06/04/2019] [Indexed: 12/15/2022] Open
Abstract
A manufacturing process for sheet-based stacked scaffolds (SSCs) based on laser-cutting (LC) was developed. The sheets consist of Polycaprolactone/Hydroxyapatite (PCL/HA) composite material. Single sheets were cut from a PCL/HA foil and stacked to scaffolds with interconnecting pores of defined sizes. HA quantities up to 50% were processable with high reproducibility, while the accuracy was dependent on the applied laser power. The smallest achievable pore sizes were about 40 µm, while the smallest stable solid structures were about 125 µm. The human mesenchymal stem cell line SCP-1 was cultured on the manufactured PCL/HA scaffolds. The cells developed a natural morphology and were able to differentiate to functional osteoblasts. The generation of PCL/HA SSCs via LC offers new possibilities for tissue engineering (TE) approaches. It is reliable and fast, with high resolution. The SSC approach allows for facile cell seeding and analysis of cell fate within the three-dimensional cell culture, thus allowing for the generation of functional tissue constructs.
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Affiliation(s)
- Jakob Schmid
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), University of Applied Sciences Munich, Munich, Germany.,Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Ludwig-Maximilians University Munich, Munich, Germany.,Department of Industrial Engineering and Management, University of Applied Sciences Munich, Munich, Germany
| | - Sascha Schwarz
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), University of Applied Sciences Munich, Munich, Germany.,Department of Mechanical Engineering, Technical University of Munich, Garching, Germany
| | - Martina Fischer
- Department of Industrial Engineering and Management, University of Applied Sciences Munich, Munich, Germany
| | - Stefanie Sudhop
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), University of Applied Sciences Munich, Munich, Germany.,Center for Nanoscience (CeNS), Ludwig Maximilian University of Munich, Munich, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), University of Applied Sciences Munich, Munich, Germany.,Center for Nanoscience (CeNS), Ludwig Maximilian University of Munich, Munich, Germany
| | - Matthias Schieker
- Laboratory of Experimental Surgery and Regenerative Medicine (ExperiMed), Ludwig-Maximilians University Munich, Munich, Germany
| | - Robert Huber
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), University of Applied Sciences Munich, Munich, Germany.,Department of Industrial Engineering and Management, University of Applied Sciences Munich, Munich, Germany
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21
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Becke TD, Ness S, Kaufmann BK, Hartmann B, Schilling AF, Sudhop S, Hilleringmann M, Clausen-Schaumann H. Pilus-1 Backbone Protein RrgB of Streptococcus pneumoniae Binds Collagen I in a Force-Dependent Way. ACS Nano 2019; 13:7155-7165. [PMID: 31184856 DOI: 10.1021/acsnano.9b02587] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Attachment to host tissue is a prerequisite for successful host colonization and invasion of pathogens. Many pathogenic bacteria use surface appendices, called pili, to bind and firmly attach to host tissue surfaces. Although it has been speculated that the laterally positioned D3 domain of the pilus-1 backbone protein RrgB of Streptococcus pneumoniae may promote bacterial-host interaction, via adhesion to extracellular matrix molecules, such as collagen, earlier studies showed no affinity of RrgB to collagen I. Using atomic force microscopy-based single molecule force spectroscopy combined with lateral force microscopy, we show that under mechanical load, RrgB in fact binds to human collagen I in a force-dependent manner. We observe exceptionally strong interactions, with interaction forces reaching as much as 1500 pN, and we show that high force loading and shearing rates enhance and further strengthen the interaction. In addition, the affinity of RrgB to collagen I under mechanical load not only depends on the orientation of the D3 domain but also on the orientation of the collagen fibrils, relative to the pulling direction. Both exceptionally high binding forces and force-induced bond strengthening resemble the behavior of so-called catch bonds, which have recently been observed in bacterial adhesins, but have not been reported for multimeric backbone subunits of virulence related pili.
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Affiliation(s)
- Tanja D Becke
- Center for Applied Tissue Engineering and Regenerative Medicine , Munich University of Applied Sciences , 80335 Munich , Germany
- Center for NanoScience , Ludwig-Maximilians-Universität München , 80799 Munich , Germany
| | - Stefan Ness
- FG Protein Biochemistry and Cellular Microbiology , Munich University of Applied Sciences , 80335 Munich , Germany
| | - Benedikt K Kaufmann
- Center for Applied Tissue Engineering and Regenerative Medicine , Munich University of Applied Sciences , 80335 Munich , Germany
- Center for NanoScience , Ludwig-Maximilians-Universität München , 80799 Munich , Germany
| | - Bastian Hartmann
- Center for Applied Tissue Engineering and Regenerative Medicine , Munich University of Applied Sciences , 80335 Munich , Germany
- Center for NanoScience , Ludwig-Maximilians-Universität München , 80799 Munich , Germany
| | - Arndt F Schilling
- Clinic for Trauma Surgery, Orthopaedics, and Plastic Surgery , University Medical Center Göttingen , 37075 Göttingen , Germany
| | - Stefanie Sudhop
- Center for Applied Tissue Engineering and Regenerative Medicine , Munich University of Applied Sciences , 80335 Munich , Germany
- Center for NanoScience , Ludwig-Maximilians-Universität München , 80799 Munich , Germany
| | - Markus Hilleringmann
- FG Protein Biochemistry and Cellular Microbiology , Munich University of Applied Sciences , 80335 Munich , Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine , Munich University of Applied Sciences , 80335 Munich , Germany
- Center for NanoScience , Ludwig-Maximilians-Universität München , 80799 Munich , Germany
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22
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Alberton P, Dugonitsch HC, Hartmann B, Li P, Farkas Z, Saller MM, Clausen-Schaumann H, Aszodi A. Aggrecan Hypomorphism Compromises Articular Cartilage Biomechanical Properties and Is Associated with Increased Incidence of Spontaneous Osteoarthritis. Int J Mol Sci 2019; 20:ijms20051008. [PMID: 30813547 PMCID: PMC6429589 DOI: 10.3390/ijms20051008] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 02/18/2019] [Accepted: 02/21/2019] [Indexed: 01/02/2023] Open
Abstract
The gene encoding the proteoglycan aggrecan (Agc1) is abundantly expressed in cartilage during development and adulthood, and the loss or diminished deposition of the protein results in a wide range of skeletal malformations. Furthermore, aggrecan degradation is a hallmark of cartilage degeneration occurring in osteoarthritis. In the present study, we investigated the consequences of a partial loss of aggrecan in the postnatal skeleton and in the articular cartilage of adult mice. We took advantage of the previously described Agc1tm(IRES-CreERT2) mouse line, which allows for conditional and timely-regulated deletion of floxed, cartilage-expressed genes. As previously reported, the introduction of the CreERT2 cassette in the 3’UTR causes a disruption of the normal expression of Agc1 resulting in a hypomorphic deposition of the protein. In homozygous mice, we observed a dwarf phenotype, which persisted throughout adulthood supporting the evidence that reduced aggrecan amount impairs skeletal growth. Homozygous mice exhibited reduced proteoglycan staining of the articular cartilage at 6 and 12 months of age, increased stiffening of the extracellular matrix at six months, and developed severe cartilage erosion by 12 months. The osteoarthritis in the hypomorph mice was not accompanied by increased expression of catabolic enzymes and matrix degradation neoepitopes. These findings suggest that the degeneration found in homozygous mice is likely due to the compromised mechanical properties of the cartilage tissue upon aggrecan reduction.
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Affiliation(s)
- Paolo Alberton
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany.
| | - Hans Christian Dugonitsch
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
| | - Bastian Hartmann
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany.
- Center for NanoScience, Ludwig-Maximilians University Munich, 80799 Munich, Germany.
| | - Ping Li
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
| | - Zsuzsanna Farkas
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
| | - Maximilian Michael Saller
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany.
- Center for NanoScience, Ludwig-Maximilians University Munich, 80799 Munich, Germany.
| | - Attila Aszodi
- Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig-Maximilians University, 80336 Munich, Germany.
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80533 Munich, Germany.
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23
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Kiderlen S, Polzer C, Rädler JO, Docheva D, Clausen-Schaumann H, Sudhop S. Age related changes in cell stiffness of tendon stem/progenitor cells and a rejuvenating effect of ROCK-inhibition. Biochem Biophys Res Commun 2019; 509:839-844. [PMID: 30638929 DOI: 10.1016/j.bbrc.2019.01.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 01/05/2019] [Indexed: 12/23/2022]
Abstract
Tendon stem/progenitor cells (TSPC) are potential targets for regenerative medicine and the treatment of tendon injuries. The frequency of such injuries increases in elderly patients while the proportion of functional TSPCs in tendon tissue decreases, protracting tendon repair. Using atomic force microscopy (AFM), we show that cell stiffness and size increase in TSPCs isolated from elderly patients (A-TSPC) compared to TSPCs from younger patients (Y-TSPC). Additionally, two-photon excited fluorescence (TPEF) microscopy revealed a denser, well-structured actin cytoskeleton in A-TSPC, which correlates with the augmented cell stiffness. Treating A-TSPC with ROCK-inhibitor, reverses these age-related changes, and has rejuvenating effect on cell morphology and stiffness. We assume that cellular stiffness is a suitable marker for cell aging and ROCK a potential target for therapeutic applications of cell rejuvenation.
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Affiliation(s)
- Stefanie Kiderlen
- Center for Applied Tissue Engineering and Regenerative Medicine - CANTER, Munich University of Applied Sciences, Munich, Germany; Faculty of Physics, Soft Condensed Matter, Ludwig-Maximilians-University, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany
| | - Christoph Polzer
- Faculty of Physics, Soft Condensed Matter, Ludwig-Maximilians-University, Munich, Germany; Multiphoton Imaging Lab, Munich University of Applied Sciences, Munich, Germany
| | - Joachim O Rädler
- Faculty of Physics, Soft Condensed Matter, Ludwig-Maximilians-University, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany
| | - Denitsa Docheva
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Center, Regensburg, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine - CANTER, Munich University of Applied Sciences, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany.
| | - Stefanie Sudhop
- Center for Applied Tissue Engineering and Regenerative Medicine - CANTER, Munich University of Applied Sciences, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany.
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24
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Becke TD, Ness S, Sudhop S, Gaub HE, Hilleringmann M, Schilling AF, Clausen-Schaumann H. Covalent Immobilization of Proteins for the Single Molecule Force Spectroscopy. J Vis Exp 2018. [PMID: 30176022 PMCID: PMC6128213 DOI: 10.3791/58167] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
In recent years, atomic force microscopy (AFM) based single molecule force spectroscopy (SMFS) extended our understanding of molecular properties and functions. It gave us the opportunity to explore a multiplicity of biophysical mechanisms, e.g., how bacterial adhesins bind to host surface receptors in more detail. Among other factors, the success of SMFS experiments depends on the functional and native immobilization of the biomolecules of interest on solid surfaces and AFM tips. Here, we describe a straightforward protocol for the covalent coupling of proteins to silicon surfaces using silane-PEG-carboxyls and the well-established N-hydroxysuccinimid/1-ethyl-3-(3-dimethyl-aminopropyl)carbodiimid (EDC/NHS) chemistry in order to explore the interaction of pilus-1 adhesin RrgA from the Gram-positive bacterium Streptococcus pneumoniae (S. pneumoniae) with the extracellular matrix protein fibronectin (Fn). Our results show that the surface functionalization leads to a homogenous distribution of Fn on the glass surface and to an appropriate concentration of RrgA on the AFM cantilever tip, apparent by the target value of up to 20% of interaction events during SMFS measurements and revealed that RrgA binds to Fn with a mean force of 52 pN. The protocol can be adjusted to couple via site specific free thiol groups. This results in a predefined protein or molecule orientation and is suitable for other biophysical applications besides the SMFS.
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Affiliation(s)
- Tanja D Becke
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences; FG Protein Biochemistry & Cellular Microbiology, Munich University of Applied Sciences; Center for Nano Science, Ludwig-Maximilians-Universität München;
| | - Stefan Ness
- FG Protein Biochemistry & Cellular Microbiology, Munich University of Applied Sciences
| | - Stefanie Sudhop
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences; Center for Nano Science, Ludwig-Maximilians-Universität München
| | - Hermann E Gaub
- Center for Nano Science, Ludwig-Maximilians-Universität München
| | - Markus Hilleringmann
- FG Protein Biochemistry & Cellular Microbiology, Munich University of Applied Sciences
| | - Arndt F Schilling
- Klinik für Unfallchirurgie, Orthopädie und Plastische Chirurgie, University Medical Center Göttingen
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences; Center for Nano Science, Ludwig-Maximilians-Universität München
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25
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Zhang J, Hartmann B, Siegel J, Marchi G, Clausen-Schaumann H, Sudhop S, Huber HP. Sacrificial-layer free transfer of mammalian cells using near infrared femtosecond laser pulses. PLoS One 2018; 13:e0195479. [PMID: 29718923 PMCID: PMC5931680 DOI: 10.1371/journal.pone.0195479] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 03/24/2018] [Indexed: 11/18/2022] Open
Abstract
Laser-induced cell transfer has been developed in recent years for the flexible and gentle printing of cells. Because of the high transfer rates and the superior cell survival rates, this technique has great potential for tissue engineering applications. However, the fact that material from an inorganic sacrificial layer, which is required for laser energy absorption, is usually transferred to the printed target structure, constitutes a major drawback of laser based cell printing. Therefore alternative approaches using deep UV laser sources and protein based acceptor films for energy absorption, have been introduced. Nevertheless, deep UV radiation can introduce DNA double strand breaks, thereby imposing the risk of carcinogenesis. Here we present a method for the laser-induced transfer of hydrogels and mammalian cells, which neither requires any sacrificial material for energy absorption, nor the use of UV lasers. Instead, we focus a near infrared femtosecond (fs) laser pulse (λ = 1030 nm, 450 fs) directly underneath a thin cell layer, suspended on top of a hydrogel reservoir, to induce a rapidly expanding cavitation bubble in the gel, which generates a jet of material, transferring cells and hydrogel from the gel/cell reservoir to an acceptor stage. By controlling laser pulse energy, well-defined cell-laden droplets can be transferred with high spatial resolution. The transferred human (SCP1) and murine (B16F1) cells show high survival rates, and good cell viability. Time laps microscopy reveals unaffected cell behavior including normal cell proliferation.
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Affiliation(s)
- Jun Zhang
- Lasercenter, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine CANTER, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
- Center for NanoScience, University of Munich, Munich, Germany
- Experimental Trauma Surgery, Department of Trauma Surgery, Franz-Josef-Strauss-Allee, Regensburg, Germany
| | - Bastian Hartmann
- Lasercenter, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine CANTER, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
| | - Julian Siegel
- Lasercenter, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine CANTER, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
| | - Gabriele Marchi
- Photonics Laboratory, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine CANTER, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
- Center for NanoScience, University of Munich, Munich, Germany
| | - Stefanie Sudhop
- Center for Applied Tissue Engineering and Regenerative Medicine CANTER, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
- Center for NanoScience, University of Munich, Munich, Germany
| | - Heinz P. Huber
- Lasercenter, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine CANTER, Munich University of Applied Sciences, Lothstrasse, Munich, Germany
- * E-mail:
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26
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Becke TD, Ness S, Gürster R, Schilling AF, di Guilmi AM, Sudhop S, Hilleringmann M, Clausen-Schaumann H. Single Molecule Force Spectroscopy Reveals Two-Domain Binding Mode of Pilus-1 Tip Protein RrgA of Streptococcus pneumoniae to Fibronectin. ACS Nano 2018; 12:549-558. [PMID: 29298375 DOI: 10.1021/acsnano.7b07247] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
For host cell adhesion and invasion, surface piliation procures benefits for bacteria. A detailed investigation of how pili adhere to host cells is therefore a key aspect in understanding their role during infection. Streptococcus pneumoniae TIGR 4, a clinical relevant serotype 4 strain, is capable of expressing pilus-1 with terminal RrgA, an adhesin interacting with host extracellular matrix (ECM) proteins. We used single molecule force spectroscopy to investigate the binding of full-length RrgA and single RrgA domains to fibronectin. Our results show that full-length RrgA and its terminal domains D3 and D4 bind to fibronectin with forces of 51.6 (full length), 52.8 (D3), and 46.2 pN (D4) at force-loading rates of around 1500 pN/s. Selective saturation of D3 and D4 binding sites on fibronectin showed that both domains can interact simultaneously with fibronectin, revealing a two-domain binding mechanism for the pilus-1 tip protein. The high off rates and the corresponding short lifetime of the RrgA Fn bond (τ = 0.26 s) may enable piliated pneumococci to form and maintain a transient contact to fibronectin-containing host surfaces and thus to efficiently scan the surface for specific receptors promoting host cell adhesion and invasion. These molecular properties could be essential for S. pneumoniae pili to mediate initial contact to the host cells and-shared with other piliated Gram-positive bacteria-favor host invasion.
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Affiliation(s)
- Tanja D Becke
- Department for Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München , 81675 Munich, Germany
- Center for NanoScience, Ludwig-Maximilians-Universität München , 80799 Munich, Germany
| | | | | | - Arndt F Schilling
- Department for Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München , 81675 Munich, Germany
- Klinik für Unfallchirurgie, Orthopädie und Plastische Chirurgie, University Medical Center Göttingen , 37075 Göttingen, Germany
| | | | - Stefanie Sudhop
- Center for NanoScience, Ludwig-Maximilians-Universität München , 80799 Munich, Germany
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27
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Dex S, Alberton P, Willkomm L, Söllradl T, Bago S, Milz S, Shakibaei M, Ignatius A, Bloch W, Clausen-Schaumann H, Shukunami C, Schieker M, Docheva D. Tenomodulin is Required for Tendon Endurance Running and Collagen I Fibril Adaptation to Mechanical Load. EBioMedicine 2017; 20:240-254. [PMID: 28566251 PMCID: PMC5478207 DOI: 10.1016/j.ebiom.2017.05.003] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/03/2017] [Accepted: 05/03/2017] [Indexed: 01/13/2023] Open
Abstract
Tendons are dense connective tissues that attach muscles to bone with an indispensable role in locomotion because of their intrinsic properties of storing and releasing muscle- generated elastic energy. Tenomodulin (Tnmd) is a well-accepted gene marker for the mature tendon/ligament lineage and its loss-of -function in mice leads to a phenotype with distinct signs of premature aging on tissue and stem/progenitor cell levels. Based on these findings, we hypothesized that Tnmd might be an important factor in the functional performance of tendons. Firstly, we revealed that Tnmd is a mechanosensitive gene and that the C-terminus of the protein co-localize with collagen I-type fibers in the extracellular matrix. Secondly, using an endurance training protocol, we compared Tnmd knockout mice with wild types and showed that Tnmd deficiency leads to significantly inferior running performance that further worsens with training. In these mice, endurance running was hindered due to abnormal response of collagen I cross-linking and proteoglycan genes leading to an inadequate collagen I fiber thickness and elasticity. In sum, our study demonstrates that Tnmd is required for proper tendon tissue adaptation to endurance running and aids in better understanding of the structural-functional relationships of tendon tissues. Tnmd is a mechanosensitive gene and its protein is co-localized with collagen I fibers in the ECM of tendons. Tnmd knockout mice fail in endurance running tests, a phenotype that worsens with training. Tnmd knockout tendons had significantly thicker and stiffer collagen I fibers and altered crosslinking gene expression.
We performed a multidisciplinary approach to decipher the role of tenomodulin, a gene marker for the mature tendon lineage, in tendon functional performance. Loss-of-function in mice led to significantly inferior endurance running and detailed analyses revealed that tenomodulin is involved in the regulation of collagen I fiber structural and biomechanical properties in response to exercise. Our study expands the current view on the complex structural-functional relationships of tendon tissues, and tenomodulin expression levels may indicate whether an individual is suitable for a certain sport.
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Affiliation(s)
- Sarah Dex
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), 80336 Munich, Germany
| | - Paolo Alberton
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), 80336 Munich, Germany
| | - Lena Willkomm
- Department of Molecular and Cellular Sports Medicine, German Sport University, 50933 Cologne, Germany
| | - Thomas Söllradl
- Center for Applied Tissue Engineering and Regenerative Medicine - CANTER, University of Applied Sciences, 80335 Munich, Germany
| | - Sandra Bago
- Center for Applied Tissue Engineering and Regenerative Medicine - CANTER, University of Applied Sciences, 80335 Munich, Germany
| | - Stefan Milz
- Department of Anatomy, Ludwig-Maximilian University (LMU), 80336 Munich, Germany
| | - Mehdi Shakibaei
- Department of Anatomy, Ludwig-Maximilian University (LMU), 80336 Munich, Germany
| | - Anita Ignatius
- Institute of Orthopaedic Research and Biomechanics, University of Ulm, 89081 Ulm, Germany
| | - Wilhelm Bloch
- Department of Molecular and Cellular Sports Medicine, German Sport University, 50933 Cologne, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine - CANTER, University of Applied Sciences, 80335 Munich, Germany
| | - Chisa Shukunami
- Department of Molecular Biology and Biochemistry, Division of Basic Life Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, 734-8553 Hiroshima, Japan
| | - Matthias Schieker
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), 80336 Munich, Germany; Novartis Institute for Biomedical Research (NIBR), Translational Medicine Musculoskeletal Disease, 4056 Basel, Switzerland
| | - Denitsa Docheva
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), 80336 Munich, Germany; Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, 93053 Regensburg, Germany.
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28
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Reuten R, Patel TR, McDougall M, Rama N, Nikodemus D, Gibert B, Delcros JG, Prein C, Meier M, Metzger S, Zhou Z, Kaltenberg J, McKee KK, Bald T, Tüting T, Zigrino P, Djonov V, Bloch W, Clausen-Schaumann H, Poschl E, Yurchenco PD, Ehrbar M, Mehlen P, Stetefeld J, Koch M. Structural decoding of netrin-4 reveals a regulatory function towards mature basement membranes. Nat Commun 2016; 7:13515. [PMID: 27901020 PMCID: PMC5141367 DOI: 10.1038/ncomms13515] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 10/09/2016] [Indexed: 02/07/2023] Open
Abstract
Netrins, a family of laminin-related molecules, have been proposed to act as guidance cues either during nervous system development or the establishment of the vascular system. This was clearly demonstrated for netrin-1 via its interaction with the receptors DCC and UNC5s. However, mainly based on shared homologies with netrin-1, netrin-4 was also proposed to play a role in neuronal outgrowth and developmental/pathological angiogenesis via interactions with netrin-1 receptors. Here, we present the high-resolution structure of netrin-4, which shows unique features in comparison with netrin-1, and show that it does not bind directly to any of the known netrin-1 receptors. We show that netrin-4 disrupts laminin networks and basement membranes (BMs) through high-affinity binding to the laminin γ1 chain. We hypothesize that this laminin-related function is essential for the previously described effects on axon growth promotion and angiogenesis. Our study unveils netrin-4 as a non-enzymatic extracellular matrix protein actively disrupting pre-existing BMs. Netrins are secreted guidance factors that promote axon outgrowth and orientation during nervous system development. Here the authors present structural and biological evidence that netrin-4 is not a guidance cue per se, but rather functions to modulate laminin-laminin interactions.
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Affiliation(s)
- Raphael Reuten
- Institute for Dental Research and Oral Musculoskeletal Biology, Medical Faculty, University of Cologne, Joseph-Stelzmann-Strasse 52, Cologne 50931, Germany.,Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Joseph-Stelzmann-Strasse 52, Cologne 50931, Germany
| | - Trushar R Patel
- Alberta RNA Research and Training Institute, Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive, Lethbridge, Alberta T1K 3M4, Canada.,School of Biosciences, University of Birmingham, Edgbaston B15 2TT, UK
| | - Matthew McDougall
- Department of Chemistry, University of Manitoba, Winnipeg R3T 2N2, Canada
| | - Nicolas Rama
- Apoptosis, Cancer and Development Laboratory, Equipe labellisée 'La Ligue', LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon 69008, France
| | - Denise Nikodemus
- Institute for Dental Research and Oral Musculoskeletal Biology, Medical Faculty, University of Cologne, Joseph-Stelzmann-Strasse 52, Cologne 50931, Germany.,Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Joseph-Stelzmann-Strasse 52, Cologne 50931, Germany
| | - Benjamin Gibert
- Apoptosis, Cancer and Development Laboratory, Equipe labellisée 'La Ligue', LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon 69008, France
| | - Jean-Guy Delcros
- Apoptosis, Cancer and Development Laboratory, Equipe labellisée 'La Ligue', LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon 69008, France
| | - Carina Prein
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Lothstrasse 34, Munich D-80335, Germany.,Laboratory of Experimental Surgery and Regenerative Medicine - ExperiMed, Department of Surgery, Clinical Center University of Munich, Nussbaumstrasse 20, Munich D-80336, Germany.,Center for Nanoscience-CeNS, Geschwister-Scholl-Platz 1, Munich D-80539, Germany
| | - Markus Meier
- Department of Chemistry, University of Manitoba, Winnipeg R3T 2N2, Canada
| | - Stéphanie Metzger
- Laboratory for Cell and Tissue Engineering, Department of Obstetrics, University Hospital Zurich, Schmelzbergstr. 12, Zurich 8091, Switzerland
| | - Zhigang Zhou
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.,Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Jennifer Kaltenberg
- Institute for Dental Research and Oral Musculoskeletal Biology, Medical Faculty, University of Cologne, Joseph-Stelzmann-Strasse 52, Cologne 50931, Germany.,Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Joseph-Stelzmann-Strasse 52, Cologne 50931, Germany
| | - Karen K McKee
- Department of Pathology, Robert Wood Johnson Medical School, Piscataway, New Jersey 08854, USA
| | - Tobias Bald
- Department of Dermatology, University Hospital Magdeburg, Magdeburg 39120, Germany.,Laboratory of Experimental Dermatology, Department of Dermatology and Allergy, University of Bonn, Bonn 53105, Germany
| | - Thomas Tüting
- Department of Dermatology, University Hospital Magdeburg, Magdeburg 39120, Germany.,Laboratory of Experimental Dermatology, Department of Dermatology and Allergy, University of Bonn, Bonn 53105, Germany
| | - Paola Zigrino
- Department of Dermatology and Venerology, University of Cologne, Cologne 50931, Germany
| | - Valentin Djonov
- Institute of Anatomy, University of Bern, Baltzerstrasse 2, Bern 3000, Switzerland
| | - Wilhelm Bloch
- Institute of Cardiovascular Research and Sport Medicine, Department of Molecular and Cellular Sport Medicine, German Sport University Cologne, Cologne 50933, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, Lothstrasse 34, Munich D-80335, Germany.,Center for Nanoscience-CeNS, Geschwister-Scholl-Platz 1, Munich D-80539, Germany
| | - Ernst Poschl
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Peter D Yurchenco
- Department of Pathology, Robert Wood Johnson Medical School, Piscataway, New Jersey 08854, USA
| | - Martin Ehrbar
- Laboratory for Cell and Tissue Engineering, Department of Obstetrics, University Hospital Zurich, Schmelzbergstr. 12, Zurich 8091, Switzerland
| | - Patrick Mehlen
- Apoptosis, Cancer and Development Laboratory, Equipe labellisée 'La Ligue', LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon, Centre Léon Bérard, Lyon 69008, France
| | - Jörg Stetefeld
- Department of Chemistry, University of Manitoba, Winnipeg R3T 2N2, Canada
| | - Manuel Koch
- Institute for Dental Research and Oral Musculoskeletal Biology, Medical Faculty, University of Cologne, Joseph-Stelzmann-Strasse 52, Cologne 50931, Germany.,Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Joseph-Stelzmann-Strasse 52, Cologne 50931, Germany
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29
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Sariisik E, Popov C, Müller JP, Docheva D, Clausen-Schaumann H, Benoit M. Decoding Cytoskeleton-Anchored and Non-Anchored Receptors from Single-Cell Adhesion Force Data. Biophys J 2016; 109:1330-3. [PMID: 26445433 PMCID: PMC4601042 DOI: 10.1016/j.bpj.2015.07.048] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 05/30/2015] [Accepted: 07/22/2015] [Indexed: 12/02/2022] Open
Abstract
Complementary to parameters established for cell-adhesion force curve analysis, we evaluated the slope before a force step together with the distance from the surface at which the step occurs and visualized the result in a two-dimensional density plot. This new tool allows detachment steps of long membrane tethers to be distinguished from shorter jumplike force steps, which are typical for cytoskeleton-anchored bonds. A prostate cancer cell line (PC3) immobilized on an atomic-force-microscopy sensor interacted with three different substrates: collagen-I (Col-I), bovine serum albumin, and a monolayer of bone marrow-derived stem cells (SCP1). To address PC3 cells’ predominant Col-I binding molecules, an antibody-blocking β1-integrin was used. Untreated PC3 cells on Col-I or SCP1 cells, which express Col-I, predominantly showed jumps in their force curves, while PC3 cells on bovine-serum-albumin- and antibody-treated PC3 cells showed long membrane tethers. The probability density plots thus revealed that β1-integrin-specific interactions are predominately anchored to the cytoskeleton, while the nonspecific interactions are mainly membrane-anchored. Experiments with latrunculin-A-treated PC3 cells corroborated these observations. The plots thus reveal details of the anchoring of bonds to the cell and provide a better understanding of receptor-ligand interactions.
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Affiliation(s)
- Ediz Sariisik
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-Universität München, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-Universität München, Munich, Germany; Center for Applied Tissue Engineering and Regenerative Medicine, University of Applied Sciences, Munich, Germany
| | - Cvetan Popov
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Jochen P Müller
- Center for NanoScience, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Denitsa Docheva
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-Universität München, Munich, Germany; Center for Applied Tissue Engineering and Regenerative Medicine, University of Applied Sciences, Munich, Germany
| | - Hauke Clausen-Schaumann
- Center for NanoScience, Ludwig-Maximilians-Universität München, Munich, Germany; Center for Applied Tissue Engineering and Regenerative Medicine, University of Applied Sciences, Munich, Germany
| | - Martin Benoit
- Center for NanoScience, Ludwig-Maximilians-Universität München, Munich, Germany; Center for Applied Tissue Engineering and Regenerative Medicine, University of Applied Sciences, Munich, Germany.
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Pill MF, Holz K, Preußke N, Berger F, Clausen-Schaumann H, Lüning U, Beyer MK. Mechanochemical Cycloreversion of Cyclobutane Observed at the Single Molecule Level. Chemistry 2016; 22:12034-9. [PMID: 27415146 DOI: 10.1002/chem.201600866] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Indexed: 11/12/2022]
Abstract
Mechanochemical cycloreversion of cyclobutane is known from ultrasound experiments. It is, however, not clear which forces are required to induce the cycloreversion. In atomic force microscopy (AFM) experiments, on the other hand, it is notoriously difficult to assign the ruptured bond. We have solved this problem through the synthesis of tailored macrocycles, in which the cyclobutane mechanophore is bypassed by an ethylene glycol chain of specific length. This macrocycle is covalently anchored between a glass substrate and an AFM cantilever by polyethylene glycol linkers. Upon mechanical stretching of the macrocycle, cycloreversion occurs, which is identified by a defined length increase of the stretched polymer. The measured length change agrees with the value calculated with the external force explicitly included (EFEI) method. By using two different lengths for the ethylene glycol safety line, the assignment becomes unambiguous. Mechanochemical cycloreversion of cyclobutane is observed at forces above 1.7 nN.
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Affiliation(s)
- Michael F Pill
- Department of Applied Natural Sciences and Mechatronics, Munich University of Applied Sciences, Lothstraße 34, 80335, Munich, Germany.,Center for Nanoscience (CeNS), Geschwister-Scholl-Platz 1, Munich, Germany
| | - Katharina Holz
- Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, Olshausenstraße 40, 24098, Kiel, Germany
| | - Nils Preußke
- Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, Olshausenstraße 40, 24098, Kiel, Germany
| | - Florian Berger
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstraße 25, 6020, Innsbruck, Austria
| | - Hauke Clausen-Schaumann
- Department of Applied Natural Sciences and Mechatronics, Munich University of Applied Sciences, Lothstraße 34, 80335, Munich, Germany.,Center for Nanoscience (CeNS), Geschwister-Scholl-Platz 1, Munich, Germany
| | - Ulrich Lüning
- Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, Olshausenstraße 40, 24098, Kiel, Germany.
| | - Martin K Beyer
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstraße 25, 6020, Innsbruck, Austria.
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Gronau T, Krüger K, Prein C, Aszodi A, Gronau I, Iozzo RV, Mooren FC, Clausen-Schaumann H, Bertrand J, Pap T, Bruckner P, Dreier R. Forced exercise-induced osteoarthritis is attenuated in mice lacking the small leucine-rich proteoglycan decorin. Ann Rheum Dis 2016; 76:442-449. [PMID: 27377816 DOI: 10.1136/annrheumdis-2016-209319] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 06/05/2016] [Accepted: 06/14/2016] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Interterritorial regions of articular cartilage matrix are rich in decorin, a small leucine-rich proteoglycan and important structural protein, also involved in many signalling events. Decorin sequesters transforming growth factor β (TGFβ), thereby regulating its activity. Here, we analysed whether increased bioavailability of TGFβ in decorin-deficient (Dcn-/-) cartilage leads to changes in biomechanical properties and resistance to osteoarthritis (OA). METHODS Unchallenged knee cartilage was analysed by atomic force microscopy (AFM) and immunohistochemistry. Active transforming growth factor β-1 (TGFβ1) content within cultured chondrocyte supernatants was measured by ELISA. Quantitative real-time (RT)-PCR was used to analyse mRNA expression of glycosaminoglycan (GAG)-modifying enzymes in C28/I2 cells following TGFβ1 treatment. In addition, OA was induced in Dcn-/- and wild-type (WT) mice via forced exercise on a treadmill. RESULTS AFM analysis revealed a strikingly higher compressive stiffness in Dcn-/- than in WT cartilage. This was accompanied by increased negative charge and enhanced sulfation of GAG chains, but not by alterations in the levels of collagens or proteoglycan core proteins. In addition, decorin-deficient chondrocytes were shown to release more active TGFβ1. Increased TGFβ signalling led to enhanced Chst11 sulfotransferase expression inducing an increased negative charge density of cartilage matrix. These negative charges might attract more water resulting in augmented compressive stiffness of the tissue. Therefore, decorin-deficient mice developed significantly less OA after forced exercise than WT mice. CONCLUSIONS Our study demonstrates that the disruption of decorin-restricted TGFβ signalling leads to higher stiffness of articular cartilage matrix, rendering joints more resistant to OA. Therefore, the loss of an important structural component can improve cartilage homeostasis.
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Affiliation(s)
- Tobias Gronau
- Institute of Experimental Musculoskeletal Medicine, University Hospital Münster, Münster, Germany.,Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Münster, Germany
| | - Karsten Krüger
- Institute of Sports Medicine, Justus-Liebig University Giessen, Giessen, Germany
| | - Carina Prein
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich University of Applied Sciences and Center for Nanoscience (CeNS), Munich, Germany
| | - Attila Aszodi
- Laboratory of Experimental Surgery and Regenerative Medicine, Department of General, Trauma and Reconstruction Surgery, Ludwig-Maximilians-University, Munich, Germany
| | - Isabel Gronau
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Münster, Germany
| | - Renato V Iozzo
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, USA
| | - Frank C Mooren
- Institute of Sports Medicine, Justus-Liebig University Giessen, Giessen, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine (CANTER), Munich University of Applied Sciences and Center for Nanoscience (CeNS), Munich, Germany
| | - Jessica Bertrand
- Institute of Experimental Musculoskeletal Medicine, University Hospital Münster, Münster, Germany.,Department of Orthopaedic Surgery, Otto-von-Guericke University, Magdeburg, Germany
| | - Thomas Pap
- Institute of Experimental Musculoskeletal Medicine, University Hospital Münster, Münster, Germany
| | - Peter Bruckner
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Münster, Germany
| | - Rita Dreier
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Münster, Germany
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Prein C, Warmbold N, Farkas Z, Schieker M, Aszodi A, Clausen-Schaumann H. Structural and mechanical properties of the proliferative zone of the developing murine growth plate cartilage assessed by atomic force microscopy. Matrix Biol 2016; 50:1-15. [DOI: 10.1016/j.matbio.2015.10.001] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 09/25/2015] [Accepted: 10/06/2015] [Indexed: 12/13/2022]
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Prein C, Clausen-Schaumann H, Aszodi A. Structural and Mechanical Cues in Cartilage Morphogenesis. Biophys J 2016. [DOI: 10.1016/j.bpj.2015.11.2664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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34
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Kamper M, Hamann N, Prein C, Clausen-Schaumann H, Farkas Z, Aszodi A, Niehoff A, Paulsson M, Zaucke F. Early changes in morphology, bone mineral density and matrix composition of vertebrae lead to disc degeneration in aged collagen IX −/− mice. Matrix Biol 2016; 49:132-143. [DOI: 10.1016/j.matbio.2015.09.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 09/25/2015] [Accepted: 09/26/2015] [Indexed: 01/26/2023]
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Aro E, Salo AM, Khatri R, Finnilä M, Miinalainen I, Sormunen R, Pakkanen O, Holster T, Soininen R, Prein C, Clausen-Schaumann H, Aszódi A, Tuukkanen J, Kivirikko KI, Schipani E, Myllyharju J. Severe Extracellular Matrix Abnormalities and Chondrodysplasia in Mice Lacking Collagen Prolyl 4-Hydroxylase Isoenzyme II in Combination with a Reduced Amount of Isoenzyme I. J Biol Chem 2015; 290:16964-78. [PMID: 26001784 DOI: 10.1074/jbc.m115.662635] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Indexed: 12/27/2022] Open
Abstract
Collagen prolyl 4-hydroxylases (C-P4H-I, C-P4H-II, and C-P4H-III) catalyze formation of 4-hydroxyproline residues required to form triple-helical collagen molecules. Vertebrate C-P4Hs are α2β2 tetramers differing in their catalytic α subunits. C-P4H-I is the major isoenzyme in most cells, and inactivation of its catalytic subunit (P4ha1(-/-)) leads to embryonic lethality in mouse, whereas P4ha1(+/-) mice have no abnormalities. To study the role of C-P4H-II, which predominates in chondrocytes, we generated P4ha2(-/-) mice. Surprisingly, they had no apparent phenotypic abnormalities. To assess possible functional complementarity, we established P4ha1(+/-);P4ha2(-/-) mice. They were smaller than their littermates, had moderate chondrodysplasia, and developed kyphosis. A transient inner cell death phenotype was detected in their developing growth plates. The columnar arrangement of proliferative chondrocytes was impaired, the amount of 4-hydroxyproline and the Tm of collagen II were reduced, and the extracellular matrix was softer in the growth plates of newborn P4ha1(+/-);P4ha2(-/-) mice. No signs of uncompensated ER stress were detected in the mutant growth plate chondrocytes. Some of these defects were also found in P4ha2(-/-) mice, although in a much milder form. Our data show that C-P4H-I can to a large extent compensate for the lack of C-P4H-II in proper endochondral bone development, but their combined partial and complete inactivation, respectively, leads to biomechanically impaired extracellular matrix, moderate chondrodysplasia, and kyphosis. Our mouse data suggest that inactivating mutations in human P4HA2 are not likely to lead to skeletal disorders, and a simultaneous decrease in P4HA1 function would most probably be required to generate such a disease phenotype.
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Affiliation(s)
- Ellinoora Aro
- From the Oulu Center for Cell-Matrix Research, Biocenter Oulu, the Faculty of Biochemistry and Molecular Medicine, and
| | - Antti M Salo
- From the Oulu Center for Cell-Matrix Research, Biocenter Oulu, the Faculty of Biochemistry and Molecular Medicine, and
| | - Richa Khatri
- the Indiana University School of Medicine, Indianapolis, Indiana 46202
| | - Mikko Finnilä
- Pathology, University of Oulu, FIN-90014 Oulu, Finland
| | | | - Raija Sormunen
- Biocenter Oulu, Pathology, University of Oulu, FIN-90014 Oulu, Finland
| | - Outi Pakkanen
- From the Oulu Center for Cell-Matrix Research, Biocenter Oulu, the Faculty of Biochemistry and Molecular Medicine, and
| | - Tiina Holster
- From the Oulu Center for Cell-Matrix Research, Biocenter Oulu, the Faculty of Biochemistry and Molecular Medicine, and
| | - Raija Soininen
- From the Oulu Center for Cell-Matrix Research, Biocenter Oulu, the Faculty of Biochemistry and Molecular Medicine, and
| | - Carina Prein
- the Department of Applied Sciences and Mechatronics and the Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80335 Munich, Germany
| | - Hauke Clausen-Schaumann
- the Department of Applied Sciences and Mechatronics and the Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80335 Munich, Germany, the Center for NanoScience, Ludwig-Maximilians University, 80539 Munich, Germany, and
| | - Attila Aszódi
- the Center for Applied Tissue Engineering and Regenerative Medicine, Munich University of Applied Sciences, 80335 Munich, Germany, the Laboratory of Experimental Surgery and Regenerative Medicine, Department of Surgery, Clinical Center University of Munich, 80336 Munich, Germany
| | | | - Kari I Kivirikko
- From the Oulu Center for Cell-Matrix Research, Biocenter Oulu, the Faculty of Biochemistry and Molecular Medicine, and
| | | | - Johanna Myllyharju
- From the Oulu Center for Cell-Matrix Research, Biocenter Oulu, the Faculty of Biochemistry and Molecular Medicine, and
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Pill MF, Schmidt SW, Beyer MK, Clausen-Schaumann H, Kersch A. A density functional theory model of mechanically activated silyl ester hydrolysis. J Chem Phys 2015; 140:044321. [PMID: 25669537 DOI: 10.1063/1.4862827] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
To elucidate the mechanism of the mechanically activated dissociation of chemical bonds between carboxymethylated amylose (CMA) and silane functionalized silicon dioxide, we have investigated the dissociation kinetics of the bonds connecting CMA to silicon oxide surfaces with density functional calculations including the effects of force, solvent polarizability, and pH. We have determined the activation energies, the pre-exponential factors, and the reaction rate constants of candidate reactions. The weakest bond was found to be the silyl ester bond between the silicon and the alkoxy oxygen atom. Under acidic conditions, spontaneous proton addition occurs close to the silyl ester such that neutral reactions become insignificant. Upon proton addition at the most favored position, the activation energy for bond hydrolysis becomes 31 kJ mol(-1), which agrees very well with experimental observation. Heterolytic bond scission in the protonated molecule has a much higher activation energy. The experimentally observed bi-exponential rupture kinetics can be explained by different side groups attached to the silicon atom of the silyl ester. The fact that different side groups lead to different dissociation kinetics provides an opportunity to deliberately modify and tune the kinetic parameters of mechanically activated bond dissociation of silyl esters.
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Affiliation(s)
- Michael F Pill
- Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Lothstr. 34, 80335 Munich, Germany
| | - Sebastian W Schmidt
- Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Lothstr. 34, 80335 Munich, Germany
| | - Martin K Beyer
- Institut für Physikalische Chemie, Christian-Albrechts-Universität zu Kiel, Olshausenstraße 40, 24098 Kiel, Germany
| | - Hauke Clausen-Schaumann
- Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Lothstr. 34, 80335 Munich, Germany
| | - Alfred Kersch
- Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Lothstr. 34, 80335 Munich, Germany
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Gronau T, Hansen U, Seidler DG, Iozzo RV, Aszódi A, Prein C, Clausen-Schaumann H, Krüger K, Mooren FC, Bertrand J, Pap T, Bruckner P, Dreier R. A4.10 Forced exercise-induced osteoarthritis is attenuated in mice lacking the small leucine-rich proteoglycan decorin. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-207259.92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Schmidt SW, Pill MF, Kersch A, Clausen-Schaumann H, Beyer MK. Mechanically induced silyl ester cleavage under acidic conditions investigated by AFM-based single-molecule force spectroscopy in the force-ramp mode. Faraday Discuss 2014; 170:357-67. [DOI: 10.1039/c3fd00119a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
AFM-based dynamic single-molecule force spectroscopy was used to stretch carboxymethylated amylose (CMA) polymers, which have been covalently tethered between a silanized glass substrate and a silanized AFM tip via acid-catalyzed ester condensation at pH 2.0. Rupture forces were measured as a function of temperature and force loading rate in the force-ramp mode. The data exhibit significant statistical scattering, which is fitted with a maximum likelihood estimation (MLE) algorithm. Bond rupture is described with a Morse potential based Arrhenius kinetics model. The fit yields a bond dissociation energy De = 35 kJ mol−1 and an Arrhenius pre-factor A = 6.6 × 104 s−1. The bond dissociation energy is consistent with previous experiments under identical conditions, where the force-clamp mode was employed. However, the bi-exponential decay kinetics, which the force-clamp results unambiguously revealed, are not evident in the force-ramp data. While it is possible to fit the force-ramp data with a bi-exponential model, the fit parameters differ from the force-clamp experiments. Overall, single-molecule force spectroscopy in the force-ramp mode yields data whose information content is more limited than force-clamp data. It may, however, still be necessary and advantageous to perform force-ramp experiments. The number of successful events is often higher in the force-ramp mode, and competing reaction pathways may make force-clamp experiments impossible.
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Affiliation(s)
- Sebastian W. Schmidt
- Munich University of Applied Sciences
- Department of Applied Natural Sciences and Mechatronics
- 80335 Munich, Germany
- Institut für Physikalische Chemie
- Christian-Albrechts-Universität zu Kiel
| | - Michael F. Pill
- Munich University of Applied Sciences
- Department of Applied Natural Sciences and Mechatronics
- 80335 Munich, Germany
- Institut für Physikalische Chemie
- Christian-Albrechts-Universität zu Kiel
| | - Alfred Kersch
- Munich University of Applied Sciences
- Department of Applied Natural Sciences and Mechatronics
- 80335 Munich, Germany
| | - Hauke Clausen-Schaumann
- Munich University of Applied Sciences
- Department of Applied Natural Sciences and Mechatronics
- 80335 Munich, Germany
- Center for NanoScience (CeNS)
- 80539 Munich, Germany
| | - Martin K. Beyer
- Institut für Physikalische Chemie
- Christian-Albrechts-Universität zu Kiel
- 24098 Kiel, Germany
- Institut für Ionenphysik und Angewandte Physik
- Leopold-Franzens-Universität Innsbruck
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Affiliation(s)
- H Clausen-Schaumann
- Lehrstuhl für Angewandte Physik and Center for NanoScience, Ludwig-Maximilians-Universität, Amalienstrasse 54, 80799 München, Germany
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Werner S, Lau VWH, Hug S, Duppel V, Clausen-Schaumann H, Lotsch BV. Cationically charged Mn(II)Al(III) LDH nanosheets by chemical exfoliation and their use as building blocks in graphene oxide-based materials. Langmuir 2013; 29:9199-9207. [PMID: 23790139 DOI: 10.1021/la400846w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report on the synthesis and exfoliation of Mn(II)Al(III) sulfonate and sulfate layered double hydroxides (LDHs) and their combination with graphene oxide by charge-directed self-assembly. The synthesis of the LDH compounds has been accomplished either directly by coprecipitation of the respective hydroxides with sulfonate anions or by ion-exchange of the chloride-containing LDH with sodium dodecylsulfate. Exfoliation of the bulk material in formamide yields colloidal suspensions of positively charged nanosheets with lateral dimensions of tens to hundreds of nanometers and thicknesses down to 1.3 nm, ascertained by TEM and AFM. Flocculation of the LDH nanosheets with an aqueous graphene oxide suspension yields a hybrid material that can be converted to a reduced graphene oxide/LDH composite by hydrazine reduction. The hybrid materials were tested for pseudocapacitive electrochemical storage capacity and electrocatalytic oxygen evolution reactions and showed significant increases compared to the pristine materials.
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Affiliation(s)
- Stephan Werner
- Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany
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Rabus M, Söllradl T, Clausen-Schaumann H, Laforsch C. Uncovering ultrastructural defences in Daphnia magna--an interdisciplinary approach to assess the predator-induced fortification of the carapace. PLoS One 2013; 8:e67856. [PMID: 23776711 PMCID: PMC3680394 DOI: 10.1371/journal.pone.0067856] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Accepted: 05/28/2013] [Indexed: 12/02/2022] Open
Abstract
The development of structural defences, such as the fortification of shells or exoskeletons, is a widespread strategy to reduce predator attack efficiency. In unpredictable environments these defences may be more pronounced in the presence of a predator. The cladoceran Daphniamagna (Crustacea: Branchiopoda: Cladocera) has been shown to develop a bulky morphotype as an effective inducible morphological defence against the predatory tadpole shrimp Triopscancriformis (Crustacea: Branchiopoda: Notostraca). Mediated by kairomones, the daphnids express an increased body length, width and an elongated tail spine. Here we examined whether these large scale morphological defences are accompanied by additional ultrastructural defences, i.e. a fortification of the exoskeleton. We employed atomic force microscopy (AFM) based nanoindentation experiments to assess the cuticle hardness along with tapping mode AFM imaging to visualise the surface morphology for predator exposed and non-predator exposed daphnids. We used semi-thin sections of the carapace to measure the cuticle thickness, and finally, we used fluorescence microscopy to analyse the diameter of the pillars connecting the two carapace layers. We found that D. magna indeed expresses ultrastructural defences against Triops predation. The cuticle in predator exposed individuals is approximately five times harder and two times thicker than in control daphnids. Moreover, the pillar diameter is significantly increased in predator exposed daphnids. These predator-cue induced changes in the carapace architecture should provide effective protection against being crushed by the predator’s mouthparts and may add to the protective effect of bulkiness. This study highlights the potential of interdisciplinary studies to uncover new and relevant aspects even in extensively studied fields of research.
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Affiliation(s)
- Max Rabus
- Department of Biology II, Ludwig-Maximilians-University Munich, Germany.
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Weiss IM, Lüke F, Eichner N, Guth C, Clausen-Schaumann H. On the function of chitin synthase extracellular domains in biomineralization. J Struct Biol 2013; 183:216-25. [PMID: 23643908 DOI: 10.1016/j.jsb.2013.04.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 04/12/2013] [Accepted: 04/21/2013] [Indexed: 11/30/2022]
Abstract
Molluscs with various shell architectures evolved around 542-525 million years ago, as part of a larger phenomenon related to the diversification of metazoan phyla. Molluscs deposit minerals in a chitin matrix. The mollusc chitin is synthesized by transmembrane enzymes that contain several unique extracellular domains. Here we investigate the assembly mechanism of the chitin synthase Ar-CS1 via its extracellular domain ArCS1_E22. The corresponding transmembrane protein ArCS1_E22TM accumulates in membrane fractions of the expression host Dictyostelium discoideum. Soluble recombinant ArCS1_E22 proteins can be purified as monomers only at basic pH. According to confocal fluorescence microscopy experiments, immunolabeled ArCS1_E22 proteins adsorb preferably to aragonitic nacre platelets at pH 7.75. At pH 8.2 or pH 9.0 the fluorescence signal is less intense, indicating that protein-mineral interaction is reduced with increasing pH. Furthermore, ArCS1_E22 forms regular nanostructures on cationic substrates as revealed by atomic force microscopy (AFM) experiments on modified mica cleavage planes. These experiments suggest that the extracellular domain ArCS1_E22 is involved in regulating the multiple enzyme activities of Ar-CS1 such as chitin synthesis and myosin movements by interaction with mineral surfaces and eventually by protein assembly. The protein complexes could locally probe the status of mineralization according to pH unless ions and pCO2 are balanced with suitable buffer substances. Taking into account that the intact enzyme could act as a force sensor, the results presented here provide further evidence that shell formation is coordinated physiologically with precise adjustment of cellular activities to the structure, topography and stiffness at the mineralizing interface.
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Affiliation(s)
- Ingrid M Weiss
- INM - Leibniz Institute for New Materials gGmbH, Biomineralization Group, D-66123 Saarbrücken, Germany.
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Sariisik E, Docheva D, Padula D, Popov C, Opfer J, Schieker M, Clausen-Schaumann H, Benoit M. Probing the interaction forces of prostate cancer cells with collagen I and bone marrow derived stem cells on the single cell level. PLoS One 2013; 8:e57706. [PMID: 23472100 PMCID: PMC3589411 DOI: 10.1371/journal.pone.0057706] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 01/28/2013] [Indexed: 01/29/2023] Open
Abstract
Adhesion of metastasizing prostate carcinoma cells was quantified for two carcinoma model cell lines LNCaP (lymph node-specific) and PC3 (bone marrow-specific). By time-lapse microscopy and force spectroscopy we found PC3 cells to preferentially adhere to bone marrow-derived mesenchymal stem cells (SCP1 cell line). Using atomic force microscopy (AFM) based force spectroscopy, the mechanical pattern of the adhesion to SCP1 cells was characterized for both prostate cancer cell lines and compared to a substrate consisting of pure collagen type I. PC3 cells dissipated more energy (27.6 aJ) during the forced de-adhesion AFM experiments and showed significantly more adhesive and stronger bonds compared to LNCaP cells (20.1 aJ). The characteristic signatures of the detachment force traces revealed that, in contrast to the LNCaP cells, PC3 cells seem to utilize their filopodia in addition to establish adhesive bonds. Taken together, our study clearly demonstrates that PC3 cells have a superior adhesive affinity to bone marrow mesenchymal stem cells, compared to LNCaP. Semi-quantitative PCR on both prostate carcinoma cell lines revealed the expression of two Col-I binding integrin receptors, α1β1 and α2β1 in PC3 cells, suggesting their possible involvement in the specific interaction to the substrates. Further understanding of the exact mechanisms behind this phenomenon might lead to optimized therapeutic applications targeting the metastatic behavior of certain prostate cancer cells towards bone tissue.
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Affiliation(s)
- Ediz Sariisik
- Chair of Biophysics and New Materials, Ludwig-Maximilians-University, Munich, Germany
- Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany
- Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Munich, Germany
| | - Denitsa Docheva
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University, Munich, Germany
| | - Daniela Padula
- Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University, Munich, Germany
- Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Munich, Germany
| | - Cvetan Popov
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University, Munich, Germany
| | - Jan Opfer
- Chair of Biophysics and New Materials, Ludwig-Maximilians-University, Munich, Germany
- Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany
| | - Matthias Schieker
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University, Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine Munich University of Applied Sciences, Munich, Germany
| | - Hauke Clausen-Schaumann
- Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany
- Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Munich, Germany
- Center for Applied Tissue Engineering and Regenerative Medicine Munich University of Applied Sciences, Munich, Germany
| | - Martin Benoit
- Chair of Biophysics and New Materials, Ludwig-Maximilians-University, Munich, Germany
- Center for NanoScience, Ludwig-Maximilians-University, Munich, Germany
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Saller MM, Prall WC, Docheva D, Schönitzer V, Popov T, Anz D, Clausen-Schaumann H, Mutschler W, Volkmer E, Schieker M, Polzer H. Increased stemness and migration of human mesenchymal stem cells in hypoxia is associated with altered integrin expression. Biochem Biophys Res Commun 2012; 423:379-85. [PMID: 22664105 DOI: 10.1016/j.bbrc.2012.05.134] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 05/25/2012] [Indexed: 12/15/2022]
Abstract
Human mesenchymal stem cells (hMSCs) are regularly cultured and characterised under normoxic (21% O(2)) conditions, although the physiological oxygen tension in the stem cell niche is known to be as low as 1-2%. Oxygen itself is an important signalling molecule, but the distinct impact on various stem cell characteristics is still unclear. Therefore, the aim of this study was to evaluate the influence of oxygen concentration on the hMSC subpopulation composition, cell morphology and migration on different surfaces (polystyrene, collagen I, fibronectin, laminin) as well as on the expression of integrin receptors. Bone marrow-derived hMSCs were cultured either in normoxic (21% O(2)) or hypoxic (2% O(2)) conditions. The hMSC subpopulations were assessed by aspect ratio and cell area. Hypoxia promoted a more homogeneous cell population with a significantly higher fraction of rapidly self-renewing cells which are believed to be the true stem cells. Under hypoxic conditions hMSC volume and height were significantly decreased on all surfaces as measured by white light confocal microscopy. Furthermore, low oxygen tension led to a significant increase in cell velocity and Euclidian distance on all matrixes, which was evaluated by time-lapse microscopy. With regard to cell-matrix contacts, expression of several integrin subunits was evaluated by semi-quantitative RT-PCR. Increased expression of the subunits α(1), α(3), α(5,) α(6), α(11), α(v), β(1) and β(3) was observed in hypoxic conditions, while α(2) was higher expressed in normoxic cultured hMSCs. Taken together, our results indicate that hypoxic conditions promote stemness and migration of hMSC along with altering their integrin expression.
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Affiliation(s)
- Maximilian Michael Saller
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilian-University, Nussbaumstr. 20, 80336 Munich, Germany
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Schmidt SW, Filippov P, Kersch A, Beyer MK, Clausen-Schaumann H. Single-molecule force-clamp experiments reveal kinetics of mechanically activated silyl ester hydrolysis. ACS Nano 2012; 6:1314-1321. [PMID: 22251147 DOI: 10.1021/nn204111w] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have investigated the strength of silyl ester bonds formed between carboxymethylated amylose (CMA) molecules and silane-functionalized silicon oxide surfaces using AFM-based single-molecule force spectroscopy in the force-clamp mode. Single tethered CMA molecules were picked up, and bond lifetimes were determined at constant clamp forces of 0.8, 1.0, and 1.2 nN at seven temperatures between 295 and 320 K at pH 2.0. The results reveal biexponential rupture kinetics. To obtain the reaction rate constants for each force and temperature individually, the results were analyzed with a biexponential kinetic model using the maximum likelihood estimation (MLE) method. The force-independent kinetic and structural parameters of the underlying bond rupture mechanisms were extracted by fitting the entire data set with a parallel MLE fit procedure using the Zhurkov/Bell model and, alternatively, an Arrhenius kinetics model combined with a Morse potential as an analytic representation of the binding potential. With activation energies between 37 and 40 kJ mol(-1), and with Arrhenius prefactors between 5 × 10(4) and 2 × 10(6) s(-1), the results point to the hydrolysis of the silyl ester bond.
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Affiliation(s)
- Sebastian W Schmidt
- Department of Precision- and Micro-Engineering, Engineering Physics, Munich University of Applied Sciences, Lothstr. 34, 80335 Munich, Germany
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Schönitzer V, Eichner N, Clausen-Schaumann H, Weiss IM. Transmembrane myosin chitin synthase involved in mollusc shell formation produced in Dictyostelium is active. Biochem Biophys Res Commun 2011; 415:586-90. [DOI: 10.1016/j.bbrc.2011.10.109] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Accepted: 10/25/2011] [Indexed: 11/25/2022]
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Schmidt SW, Kersch A, Beyer MK, Clausen-Schaumann H. Mechanically activated rupture of single covalent bonds: evidence of force induced bond hydrolysis. Phys Chem Chem Phys 2011; 13:5994-9. [DOI: 10.1039/c0cp02827d] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Docheva D, Padula D, Schieker M, Clausen-Schaumann H. Effect of collagen I and fibronectin on the adhesion, elasticity and cytoskeletal organization of prostate cancer cells. Biochem Biophys Res Commun 2010; 402:361-6. [DOI: 10.1016/j.bbrc.2010.10.034] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Accepted: 10/07/2010] [Indexed: 11/24/2022]
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Schmidt SW, Christ T, Glockner C, Beyer MK, Clausen-Schaumann H. Simple coupling chemistry linking carboxyl-containing organic molecules to silicon oxide surfaces under acidic conditions. Langmuir 2010; 26:15333-15338. [PMID: 20822126 DOI: 10.1021/la102435f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The coupling chemistry of carboxymethylated amylose with organo-silanized silicon oxide surfaces at pH 7.4 and 2.0 was investigated using atomic force microscopy (AFM) based single-molecule force spectroscopy. At close to neutral pH, carbodiimide activation of a carboxylic acid affords formation of an amide bond with an amino surface linker. At pH 2.0, no activation with carbodiimide was required to anchor carboxymethylated amylose between an AFM tip and a glass substrate. At the same time, the mean bond rupture force f(r) dropped from 1.65 ± 0.37 nN at pH 7.4 to 1.39 ± 0.30 nN at pH 2.0 without carbodiimide, indicating that a different link to the surface can be formed at low pH. The coupling mechanism at pH 2.0 was elucidated by a series of experiments, in which the surface was functionalized with four different organosilanes, each containing characteristic functional groups. The results are rationalized with an acid-catalyzed ester condensation between a carboxyl group and a free, unreacted silanol group in the surface anchor or on the surface.
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Affiliation(s)
- Sebastian W Schmidt
- Department of Precision- and Micro-Engineering, Engineering Physics, Munich University of Applied Sciences, Lothstr. 34, 80335 Munich, Germany
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Docheva D, Padula D, Popov C, Weishaupt P, Prägert M, Miosge N, Hickel R, Böcker W, Clausen-Schaumann H, Schieker M. Establishment of immortalized periodontal ligament progenitor cell line and its behavioural analysis on smooth and rough titanium surface. Eur Cell Mater 2010; 19:228-41. [PMID: 20473831 DOI: 10.22203/ecm.v019a22] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Periodontal ligament (PDL) can be obtained from patients undergoing orthodontic treatment. PDL contains progenitor cells that can be expanded and differentiated towards several mesenchymal lineages in vitro. Furthermore, PDL-derived cells have been shown to generate bone- and PDL-like structures in vivo. Thus, PDL cells, combined with suitable biomaterials, represent a promising tool for periodontitis-related research and PDL engineering. Here, a new PDL cell line using lentiviral gene transfer of human telomerase reverse transcriptase (hTERT) was created. HTERT-expressing PDL cells showed similar morphology and population doubling time but an extended lifespan compared to the primary cells. In addition, PDL-hTERT cells expressed several characteristic genes and upon osteogenic stimulation produced a calcified matrix in vitro. When cultivated on two topographically different titanium scaffolds (MA and SLA), PDL-hTERT cells exhibited augmented spreading, survival and differentiation on smooth (MA) compared to rough (SLA) surfaces. These findings differ from previously reported osteoblast behaviour, but they are in agreement with the behaviour of chondrocytes and gingival fibroblasts, suggesting a very cell type-specific response to different surface textures. In summary, we report the testing of titanium biomaterials using a new PDL-hTERT cell line and propose this cell line as a useful model system for periodontitis research and development of novel strategies for PDL engineering.
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Affiliation(s)
- D Docheva
- Laboratory for Experimental Surgery and Regenerative Medicine, Department of Surgery, LMU, Nussbaumstr. 20, D-80336 Munich, Germany.
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