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Contact guidance of mesenchymal stem cells by flagellin-modified substrates: aspects of cell-surface interaction from the point of view of liquid crystal theory. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Thamm K, Möbus K, Towers R, Baertschi S, Wetzel R, Wobus M, Segeletz S. A chemically defined biomimetic surface for enhanced isolation efficiency of high-quality human mesenchymal stromal cells under xenogeneic/serum-free conditions. Cytotherapy 2022; 24:1049-1059. [PMID: 35931601 DOI: 10.1016/j.jcyt.2022.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 05/23/2022] [Accepted: 06/10/2022] [Indexed: 11/15/2022]
Abstract
BACKGROUND AIMS Mesenchymal stromal cells (MSCs) are one of the most frequently used cell types in regenerative medicine and cell therapy. Generating sufficient cell numbers for MSC-based therapies is constrained by (i) their low abundance in tissues of origin, which imposes the need for significant ex vivo cell expansion; (ii) donor-specific characteristics, including MSC frequency/quality, that decline with disease state and increasing age; and (iii) cellular senescence, which is promoted by extensive cell expansion and results in decreased therapeutic functionality. The final yield of a manufacturing process is therefore primarily determined by the applied isolation procedure and its efficiency in isolating therapeutically active cells from donor tissue. To date, MSCs are predominantly isolated using media supplemented with either serum or its derivatives, which poses safety and consistency issues. METHODS To overcome these limitations while enabling robust MSC production with constant high yield and quality, the authors developed a chemically defined biomimetic surface coating called isoMATRIX (denovoMATRIX GmbH, Dresden, Germany) and tested its performance during isolation of MSCs. RESULTS The isoMATRIX facilitates the isolation of significantly higher numbers of MSCs in xenogeneic (xeno)/serum-free and chemically defined conditions. The isolated cells display a smaller cell size and higher proliferation rate than those derived from a serum-containing isolation procedure and a strong immunomodulatory capacity. The high proliferation rates can be maintained up to 5 passages after isolation and cells even benefit from a switch towards a proliferation-specific MSC matrix (myMATRIX MSC) (denovoMATRIX GmbH, Dresden, Germany). CONCLUSION In sum, isoMATRIX promotes enhanced xeno/serum-free and chemically defined isolation of human MSCs and supports consistent and reliable cell performance for improved stem cell-based therapies.
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Affiliation(s)
| | - Kristin Möbus
- Universitätskrankenhaus Carl Gustav Carus der Technischen Universität Dresden, Dresden, Germany
| | - Russell Towers
- Universitätskrankenhaus Carl Gustav Carus der Technischen Universität Dresden, Dresden, Germany
| | | | | | - Manja Wobus
- Universitätskrankenhaus Carl Gustav Carus der Technischen Universität Dresden, Dresden, Germany
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Peng Q, Shan D, Cui K, Li K, Zhu B, Wu H, Wang B, Wong S, Norton V, Dong Y, Lu YW, Zhou C, Chen H. The Role of Endothelial-to-Mesenchymal Transition in Cardiovascular Disease. Cells 2022; 11:1834. [PMID: 35681530 PMCID: PMC9180466 DOI: 10.3390/cells11111834] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 06/01/2022] [Accepted: 06/01/2022] [Indexed: 02/07/2023] Open
Abstract
Endothelial-to-mesenchymal transition (EndoMT) is the process of endothelial cells progressively losing endothelial-specific markers and gaining mesenchymal phenotypes. In the normal physiological condition, EndoMT plays a fundamental role in forming the cardiac valves of the developing heart. However, EndoMT contributes to the development of various cardiovascular diseases (CVD), such as atherosclerosis, valve diseases, fibrosis, and pulmonary arterial hypertension (PAH). Therefore, a deeper understanding of the cellular and molecular mechanisms underlying EndoMT in CVD should provide urgently needed insights into reversing this condition. This review summarizes a 30-year span of relevant literature, delineating the EndoMT process in particular, key signaling pathways, and the underlying regulatory networks involved in CVD.
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Affiliation(s)
- Qianman Peng
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Dan Shan
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Kui Cui
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Kathryn Li
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Bo Zhu
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Hao Wu
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Beibei Wang
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Scott Wong
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Vikram Norton
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Yunzhou Dong
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Yao Wei Lu
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
| | - Changcheng Zhou
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA;
| | - Hong Chen
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA; (Q.P.); (D.S.); (K.C.); (K.L.); (B.Z.); (H.W.); (B.W.); (S.W.); (V.N.); (Y.D.); (Y.W.L.)
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Le Saux G, Wu MC, Toledo E, Chen YQ, Fan YJ, Kuo JC, Schvartzman M. Cell-Cell Adhesion-Driven Contact Guidance and Its Effect on Human Mesenchymal Stem Cell Differentiation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:22399-22409. [PMID: 32323968 DOI: 10.1021/acsami.9b20939] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Contact guidance has been extensively explored using patterned adhesion functionalities that predominantly mimic cell-matrix interactions. Whether contact guidance can also be driven by other types of interactions, such as cell-cell adhesion, still remains a question. Herein, this query is addressed by engineering a set of microstrip patterns of (i) cell-cell adhesion ligands and (ii) segregated cell-cell and cell-matrix ligands as a simple yet versatile set of platforms for the guidance of spreading, adhesion, and differentiation of mesenchymal stem cells. It was unprecedently found that micropatterns of cell-cell adhesion ligands can induce contact guidance. Surprisingly, it was found that patterns of alternating cell-matrix and cell-cell strips also induce contact guidance despite providing a spatial continuum for cell adhesion. This guidance is believed to be due to the difference between the potencies of the two adhesions. Furthermore, patterns that combine the two segregated adhesion functionalities were shown to induce more human mesenchymal stem cell osteogenic differentiation than monofunctional patterns. This work provides new insight into the functional crosstalk between cell-cell and cell-matrix adhesions and, overall, further highlights the ubiquitous impact of the biochemical anisotropy of the extracellular environment on cell function.
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Affiliation(s)
- Guillaume Le Saux
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Isle Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Ming-Chung Wu
- Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei 11221, Taiwan
| | - Esti Toledo
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Isle Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Yin-Quan Chen
- Cancer Progression Research Center, National Yang-Ming University, Taipei 11221, Taiwan
| | - Yu-Jui Fan
- School of Biomedical Engineering, Taipei Medical University, Taipei 110, Taiwan
| | - Jean-Cheng Kuo
- Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei 11221, Taiwan
- Cancer Progression Research Center, National Yang-Ming University, Taipei 11221, Taiwan
| | - Mark Schvartzman
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Isle Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
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Shridhar A, Amsden BG, Gillies ER, Flynn LE. Investigating the Effects of Tissue-Specific Extracellular Matrix on the Adipogenic and Osteogenic Differentiation of Human Adipose-Derived Stromal Cells Within Composite Hydrogel Scaffolds. Front Bioeng Biotechnol 2019; 7:402. [PMID: 31921807 PMCID: PMC6917659 DOI: 10.3389/fbioe.2019.00402] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 11/22/2019] [Indexed: 12/21/2022] Open
Abstract
While it has been postulated that tissue-specific bioscaffolds derived from the extracellular matrix (ECM) can direct stem cell differentiation, systematic comparisons of multiple ECM sources are needed to more fully assess the benefits of incorporating tissue-specific ECM in stem cell culture and delivery platforms. To probe the effects of ECM sourced from decellularized adipose tissue (DAT) or decellularized trabecular bone (DTB) on the adipogenic and osteogenic differentiation of human adipose-derived stem/stromal cells (ASCs), a novel detergent-free decellularization protocol was developed for bovine trabecular bone that complemented our established detergent-free decellularization protocol for human adipose tissue and did not require specialized equipment or prolonged incubation times. Immunohistochemical and biochemical characterization revealed enhanced sulphated glycosaminoglycan content in the DTB, while the DAT contained higher levels of collagen IV, collagen VI and laminin. To generate platforms with similar structural and biomechanical properties to enable assessment of the compositional effects of the ECM on ASC differentiation, micronized DAT and DTB were encapsulated with human ASCs within methacrylated chondroitin sulfate (MCS) hydrogels through UV-initiated crosslinking. High ASC viability (>90%) was observed over 14 days in culture. Adipogenic differentiation was enhanced in the MCS+DAT composites relative to the MCS+DTB composites and MCS controls after 14 days of culture in adipogenic medium. Osteogenic differentiation studies revealed a peak in alkaline phosphatase (ALP) enzyme activity at 7 days in the MCS+DTB group cultured in osteogenic medium, suggesting that the DTB had bioactive effects on osteogenic protein expression. Overall, the current study suggests that tissue-specific ECM sourced from DAT or DTB can act synergistically with soluble differentiation factors to enhance the lineage-specific differentiation of human ASCs within 3-D hydrogel systems.
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Affiliation(s)
- Arthi Shridhar
- Department of Chemical and Biochemical Engineering, Thompson Engineering Building, The University of Western Ontario, London, ON, Canada
- Bone and Joint Institute, The University of Western Ontario, London, ON, Canada
| | - Brian G. Amsden
- Department of Chemical Engineering, Queen's University, Kingston, ON, Canada
| | - Elizabeth R. Gillies
- Department of Chemical and Biochemical Engineering, Thompson Engineering Building, The University of Western Ontario, London, ON, Canada
- Bone and Joint Institute, The University of Western Ontario, London, ON, Canada
- Department of Chemistry, The University of Western Ontario, London, ON, Canada
| | - Lauren E. Flynn
- Department of Chemical and Biochemical Engineering, Thompson Engineering Building, The University of Western Ontario, London, ON, Canada
- Bone and Joint Institute, The University of Western Ontario, London, ON, Canada
- Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, ON, Canada
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Shridhar A, Lam AYL, Sun Y, Simmons CA, Gillies ER, Flynn LE. Culture on Tissue‐Specific Coatings Derived from α‐Amylase‐Digested Decellularized Adipose Tissue Enhances the Proliferation and Adipogenic Differentiation of Human Adipose‐Derived Stromal Cells. Biotechnol J 2019; 15:e1900118. [DOI: 10.1002/biot.201900118] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 10/08/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Arthi Shridhar
- Department of Chemical and Biochemical EngineeringThompson Engineering BuildingThe University of Western Ontario London N6A 5B9 Ontario Canada
| | - Alan Y. L. Lam
- Institute of Biomaterials and Biomedical EngineeringUniversity of Toronto Toronto M5S 3G9 Ontario Canada
| | - Yu Sun
- Institute of Biomaterials and Biomedical EngineeringUniversity of Toronto Toronto M5S 3G9 Ontario Canada
- Department of Mechanical and Industrial EngineeringUniversity of Toronto Toronto M5S 3G8 Ontario Canada
| | - Craig A. Simmons
- Institute of Biomaterials and Biomedical EngineeringUniversity of Toronto Toronto M5S 3G9 Ontario Canada
- Department of Mechanical and Industrial EngineeringUniversity of Toronto Toronto M5S 3G8 Ontario Canada
| | - Elizabeth R. Gillies
- Department of Chemical and Biochemical EngineeringThompson Engineering BuildingThe University of Western Ontario London N6A 5B9 Ontario Canada
- Department of ChemistryThe University of Western Ontario London N6A 5B7 Ontario Canada
| | - Lauren E. Flynn
- Department of Chemical and Biochemical EngineeringThompson Engineering BuildingThe University of Western Ontario London N6A 5B9 Ontario Canada
- Department of Anatomy & Cell BiologySchulich School of Medicine & DentistryThe University of Western Ontario London N6A 3K7 Ontario Canada
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Tadsen M, Friedrich RP, Riedel S, Alexiou C, Mayr SG. Contact Guidance by Microstructured Gelatin Hydrogels for Prospective Tissue Engineering Applications. ACS APPLIED MATERIALS & INTERFACES 2019; 11:7450-7458. [PMID: 30633496 DOI: 10.1021/acsami.8b21638] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Design of functionalized biomimetic scaffolds is one of the key approaches for regenerative medicine and other biomedical applications. Development of engineered tissue should optimize organization and function of cells and tissue in vitro as well as in vivo. Surface topography is one factor controlling cellular behavior and tissue development. By topographical patterning of biocompatible materials, highly functionalized scaffolds can be developed. Gelatin is hereby a promising candidate due to its biocompatibility and biodegradability. It is low in cost and easy to handle, enabling a variety of applications in science and medicine. However, for biomedical applications at physiological conditions, gelatin has to be additionally stabilized since its gel-sol-transition temperature lies beneath the human body temperature. This is realized by a reagent-free cross-linking technique utilizing electron beam treatment. By topographical patterning, gelatin can be functionalized toward scaffolds for cell cultivation and tissue development. Thereby, customized patterns are transferred onto gelatin hydrogels via molds. Thermal stabilization of gelatin is then achieved by electron-induced cross-linking. In this study, we investigate the influence of gelatin concentration and irradiation dose on pattern transfer, long-term stability of topographically patterned gelatin hydrogels, and their impact on the cellular behavior of human umbilical vein endothelial cells as well as normal human dermal fibroblasts. We will show that contact guidance occurs for both cell types due to a concrete stripe pattern. In addition, the presented studies show a high degree of cytocompatibility, indicating a high potential of topographically patterned gelatin hydrogels as tissue development scaffold for prospective biomedical applications.
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Affiliation(s)
- Meike Tadsen
- Leibniz Institute of Surface Engineering (IOM) , Permoserstr. 15 , 04318 Leipzig , Germany
- Division of Surface Physics, Department of Physics and Earth Sciences , Leipzig University , Linnéstr. 5 , 04103 Leipzig , Germany
| | - Ralf P Friedrich
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON) , Universitätsklinikum Erlangen , Glückstraße 10a , 91054 Erlangen , Germany
| | - Stefanie Riedel
- Leibniz Institute of Surface Engineering (IOM) , Permoserstr. 15 , 04318 Leipzig , Germany
- Division of Surface Physics, Department of Physics and Earth Sciences , Leipzig University , Linnéstr. 5 , 04103 Leipzig , Germany
| | - Christoph Alexiou
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON) , Universitätsklinikum Erlangen , Glückstraße 10a , 91054 Erlangen , Germany
| | - Stefan G Mayr
- Leibniz Institute of Surface Engineering (IOM) , Permoserstr. 15 , 04318 Leipzig , Germany
- Division of Surface Physics, Department of Physics and Earth Sciences , Leipzig University , Linnéstr. 5 , 04103 Leipzig , Germany
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Wang J, Schneider IC. Myosin phosphorylation on stress fibers predicts contact guidance behavior across diverse breast cancer cells. Biomaterials 2017; 120:81-93. [PMID: 28039755 PMCID: PMC5291342 DOI: 10.1016/j.biomaterials.2016.11.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 11/22/2016] [Accepted: 11/24/2016] [Indexed: 11/24/2022]
Abstract
During cancer progression the extracellular matrix is remodeled, forming aligned collagen fibers that proceed radially from the tumor, resulting in invasion. We have recently shown that different invasive breast cancer cells respond to epitaxially grown, aligned collagen fibrils differently. This article develops insight into why these cells differ in their contact guidance fidelity. Small changes in contractility or adhesion dramatically alter directional persistence on aligned collagen fibrils, while migration speed remains constant. The directionality of highly contractile and adhesive MDA-MB-231 cells can be diminished by inhibiting Rho kinase or β1 integrin binding. Inversely, the directionality of less contractile and adhesive MTLn3 cells can be enhanced by activating contractility or integrins. Subtle, but quantifiable alterations in myosin II regulatory light chain phosphorylation on stress fibers explain the tuning of contact guidance fidelity, separate from migration per se indicating that the contractile and adhesive state of the cell in combination with collagen organization in the tumor microenvironment determine the efficiency of migration. Understanding how distinct cells respond to contact guidance cues will not only illuminate mechanisms for cancer invasion, but will also allow for the design of environments to separate specific subpopulations of cells from patient-derived tissues by leveraging differences in responses to directional migration cues.
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Affiliation(s)
- Juan Wang
- Department of Chemical and Biological Engineering, Iowa State University, USA
| | - Ian C Schneider
- Department of Chemical and Biological Engineering, Iowa State University, USA; Department of Genetics, Development and Cell Biology, Iowa State University, USA.
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Steeves AJ, Atwal A, Schock SC, Variola F. Evaluation of the direct effects of poly(dopamine) on the in vitro response of human osteoblastic cells. J Mater Chem B 2016; 4:3145-3156. [DOI: 10.1039/c5tb02510a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functional poly(dopamine) coatings promise to become an efficient strategy to endow biomaterials with enhanced bioactive properties.
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Affiliation(s)
- Alexander J. Steeves
- Faculty of Engineering
- Department of Mechanical Engineering
- University of Ottawa
- Canada
| | - Aman Atwal
- Faculty of Science
- Department of Biopharmaceutical Sciences
- University of Ottawa
- Canada
| | - Sarah C. Schock
- The Children's Hospital of Eastern Ontario (CHEO) Research Institute
- Canada
- Faculty of Medicine
- Department of Cellular and Molecular Medicine
- University of Ottawa
| | - Fabio Variola
- Faculty of Engineering
- Department of Mechanical Engineering
- University of Ottawa
- Canada
- Faculty of Medicine
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Hauff K, Zambarda C, Dietrich M, Halbig M, Grab AL, Medda R, Cavalcanti-Adam EA. Matrix-Immobilized BMP-2 on Microcontact Printed Fibronectin as an in vitro Tool to Study BMP-Mediated Signaling and Cell Migration. Front Bioeng Biotechnol 2015; 3:62. [PMID: 26029690 PMCID: PMC4426815 DOI: 10.3389/fbioe.2015.00062] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 04/20/2015] [Indexed: 12/31/2022] Open
Abstract
During development, growth factors (GFs) such as bone morphogenetic proteins (BMPs) exert important functions in several tissues by regulating signaling for cell differentiation and migration. In vivo, the extracellular matrix (ECM) not only provides support for adherent cells, but also acts as reservoir of GFs. Several constituents of the ECM provide adhesive cues, which serve as binding sites for cell trans-membrane receptors, such as integrins. In conveying adhesion-mediated signaling to the intracellular compartment, integrins do not function alone but rather crosstalk and cooperate with other receptors, such as GF receptors. Here, we present a strategy for the immobilization of BMP-2 onto cellular fibronectin (cFN), a key protein of the ECM, to investigate GF-mediated signaling and migration. Following biotinylation, BMP-2 was linked to biotinylated cFN using NeutrAvidin as cross-linker. Characterization with quartz crystal microbalance with dissipation monitoring and enzyme-linked immunosorbent assay confirmed the efficient immobilization of BMP-2 on cFN over a period of 24 h. To validate the bioactivity of matrix-immobilized BMP-2 (iBMP-2), we investigated short- and long-term responses of C2C12 myoblasts, which are an established in vitro model for BMP-2 signaling, in comparison to soluble BMP-2 (sBMP-2) or in absence of GFs. Similarly to sBMP-2, iBMP-2 triggered Smad 1/5 phosphorylation and translocation of the complex to the nucleus, corresponding to the activation of BMP-mediated Smad-dependent pathway. Additionally, successful suppression of myotube formation was observed after 6 days in sBMP-2 and iBMP-2. We next implemented this approach in the fabrication of cFN micropatterned stripes by soft lithography. These stripes allowed cell-surface interaction only on the patterned cFN, since the surface in between was passivated, thus serving as platform for studies on directed cell migration. During a 10-h observation time, the migratory behavior, especially the cells' net displacement, was increased in presence of BMP-2. As such, this versatile tool retains the bioactivity of GFs and allows the presentation of ECM adhesive cues.
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Affiliation(s)
- Kristin Hauff
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany ; Applied Chemistry, University of Reutlingen , Reutlingen , Germany
| | - Chiara Zambarda
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany ; Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems , Stuttgart , Germany
| | - Miriam Dietrich
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany
| | - Maria Halbig
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany ; Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems , Stuttgart , Germany
| | - Anna Luise Grab
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany
| | - Rebecca Medda
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany ; Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems , Stuttgart , Germany
| | - Elisabetta Ada Cavalcanti-Adam
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany ; Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems , Stuttgart , Germany
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