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N-cadherin in osteolineage cells modulates stromal support of tumor growth. J Bone Oncol 2021; 28:100356. [PMID: 33912383 PMCID: PMC8065282 DOI: 10.1016/j.jbo.2021.100356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 02/03/2021] [Accepted: 02/09/2021] [Indexed: 12/02/2022] Open
Abstract
N-cadherin in osteolineage, Osterix+ cells restrains extraskeletal tumor growth. Osterix+ cells are present in the stromal microenvironment of extraskeletal tumors. Osterix+ cells are present in normal tissues frequent sites of metastasis. N-cadherin modulates pro-tumorigenic signaling in tumor associated Osterix+ cells.
Tumor growth and metastases are dependent on interactions between cancer cells and the local environment. Expression of the cell–cell adhesion molecule N-cadherin (Ncad) is associated with highly aggressive cancers, and its expression by osteogenic cells has been proposed to provide a molecular “dock” for disseminated tumor cells to establish in pre-metastatic niches within the bone. To test this biologic model, we conditionally deleted the Ncad gene (Cdh2) in osteolineage cells using Osx-cre (cKO). Contrary to expectations, the metastatic breast cancer cell line PyMT-BO1 was able to form tumors in bone and to induce osteolysis in cKO as well as in control mice. Despite absence of Ncad, bone marrow stromal cells isolated from cKO mice were able to engage in direct cell–cell interactions with tumor cells expressing either N- or E-cadherin. However, subcutaneous PyMT-BO1 and B16F10 tumors grew larger in cKO relative to control littermates. Cell tracking experiments using the Ai9 reporter revealed the presence of Osx+ and Ncad+ cells in the stroma of extra-skeletal tumors and in a small population of lung cells. Gene expression analysis by RNAseq of Osx+ cells isolated from extra-skeletal tumors revealed alterations of pro-tumorigenic signaling pathways in cKO cells relative to control Osx+ cells. Thus, Ncad in Osx+ cells is not necessary for the establishment of bone metastases, but in extra-skeletal tumors it regulates pro-tumorigenic support by the microenvironment.
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Ranjan VD, Qiu L, Lee JWL, Chen X, Jang SE, Chai C, Lim KL, Tan EK, Zhang Y, Huang WM, Zeng L. A microfiber scaffold-based 3D in vitro human neuronal culture model of Alzheimer's disease. Biomater Sci 2020; 8:4861-4874. [PMID: 32789337 DOI: 10.1039/d0bm00833h] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Increasing evidence indicates superiority of three-dimensional (3D) in vitro cell culture systems over conventional two-dimensional (2D) monolayer cultures in mimicking native in vivo microenvironments. Tissue-engineered 3D culture models combined with stem cell technologies have advanced Alzheimer's disease (AD) pathogenesis studies. However, existing 3D neuronal models of AD overexpress mutant genes or have heterogeneities in composition, biological properties and cell differentiation stages. Here, we encapsulate patient induced pluripotent stem cell (iPSC) derived neural progenitor cells (NPC) in poly(lactic-co-glycolic acid) (PLGA) microtopographic scaffolds fabricated via wet electrospinning to develop a novel 3D culture model of AD. First, we enhanced cellular infiltration and distribution inside the scaffold by optimizing various process parameters such as fiber diameter, pore size, porosity and hydrophilicity. Next, we compared key neural stem cell features including viability, proliferation and differentiation in 3D culture with 2D monolayer controls. The 3D microfibrous substrate reduces cell proliferation and significantly accelerates neuronal differentiation within seven days of culture. Furthermore, 3D culture spontaneously enhanced pathogenic amyloid-beta 42 (Aβ42) and phospho-tau levels in differentiated neurons carrying familial AD (FAD) mutations, compared with age-matched healthy controls. Overall, our tunable scaffold-based 3D neuronal culture platform serves as a suitable in vitro model that robustly recapitulates and accelerates the pathogenic characteristics of FAD-iPSC derived neurons.
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Affiliation(s)
- Vivek Damodar Ranjan
- NTU Institute for Health Technologies, Interdisciplinary Graduate School, Nanyang Technological University, Singapore 639798, Singapore
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Abstract
Modulation of cellular electrophysiology helps develop an understanding of cellular development and function in healthy and diseased states. We modulate the electrophysiology of neuronal cells in two-dimensional (2D) and 3D assemblies with subcellular precision via photothermal stimulation using a multiscale fuzzy graphene nanostructure. Nanowire (NW)-templated 3D fuzzy graphene (NT-3DFG) nanostructures enable remote, nongenetic photothermal stimulation with laser energies as low as subhundred nanojoules without generating cellular stress. NT-3DFG serves as a powerful toolset for studies of cell signaling within and between in vitro 3D models (human-based organoids and spheroids) and can enable therapeutic interventions. The ability to modulate cellular electrophysiology is fundamental to the investigation of development, function, and disease. Currently, there is a need for remote, nongenetic, light-induced control of cellular activity in two-dimensional (2D) and three-dimensional (3D) platforms. Here, we report a breakthrough hybrid nanomaterial for remote, nongenetic, photothermal stimulation of 2D and 3D neural cellular systems. We combine one-dimensional (1D) nanowires (NWs) and 2D graphene flakes grown out-of-plane for highly controlled photothermal stimulation at subcellular precision without the need for genetic modification, with laser energies lower than a hundred nanojoules, one to two orders of magnitude lower than Au-, C-, and Si-based nanomaterials. Photothermal stimulation using NW-templated 3D fuzzy graphene (NT-3DFG) is flexible due to its broadband absorption and does not generate cellular stress. Therefore, it serves as a powerful toolset for studies of cell signaling within and between tissues and can enable therapeutic interventions.
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Kalmykov A, Huang C, Bliley J, Shiwarski D, Tashman J, Abdullah A, Rastogi SK, Shukla S, Mataev E, Feinberg AW, Hsia KJ, Cohen-Karni T. Organ-on-e-chip: Three-dimensional self-rolled biosensor array for electrical interrogations of human electrogenic spheroids. SCIENCE ADVANCES 2019; 5:eaax0729. [PMID: 31467978 PMCID: PMC6707782 DOI: 10.1126/sciadv.aax0729] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 07/12/2019] [Indexed: 05/03/2023]
Abstract
Cell-cell communication plays a pivotal role in coordination and function of biological systems. Three-dimensional (3D) spheroids provide venues to explore cellular communication for tissue development and drug discovery, as their 3D architecture mimics native in vivo microenvironments. Cellular electrophysiology is a prevalent signaling paradigm for studying electroactive cells. Currently, electrophysiological studies do not provide direct, multisite, simultaneous investigation of tissues in 3D. In this study, 3D self-rolled biosensor arrays (3D-SR-BAs) of either active field-effect transistors or passive microelectrodes were implemented to interface human cardiac spheroids in 3D. The arrays provided continuous and stable multiplexed recordings of field potentials with high sensitivity and spatiotemporal resolution, supported with simultaneous calcium imaging. Our approach enables electrophysiological investigation and monitoring of the complex signal transduction in 3D cellular assemblies toward an organ-on-an-electronic-chip (organ-on-e-chip) platform for tissue maturation investigations and development of drugs for disease treatment, such as arrhythmias.
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Affiliation(s)
- Anna Kalmykov
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Changjin Huang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798 Singapore, Republic of Singapore
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 639798 Singapore, Republic of Singapore
| | - Jacqueline Bliley
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Daniel Shiwarski
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Joshua Tashman
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Arif Abdullah
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana-Champaign, IL 61801, USA
| | - Sahil K. Rastogi
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Shivani Shukla
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Elnatan Mataev
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Adam W. Feinberg
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - K. Jimmy Hsia
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798 Singapore, Republic of Singapore
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 639798 Singapore, Republic of Singapore
| | - Tzahi Cohen-Karni
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
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Electrophysiological investigation of human embryonic stem cell derived neurospheres using a novel spike detection algorithm. Biosens Bioelectron 2017; 100:462-468. [PMID: 28963963 DOI: 10.1016/j.bios.2017.09.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 08/10/2017] [Accepted: 09/18/2017] [Indexed: 02/07/2023]
Abstract
Microelectrode array (MEA) technology in combination with three-dimensional (3D) neuronal cell models derived from human embryonic stem cells (hESC) provide an excellent tool for neurotoxicity screening. Yet, there are significant challenges in terms of data processing and analysis, since neuronal signals have very small amplitudes and the 3D structure enhances the level of background noise. Thus, neuronal signal analysis requires the application of highly sophisticated algorithms. In this study, we present a new approach optimized for the detection of spikes recorded from 3D neurospheres (NS) with a very low signal-to-noise ratio. This was achieved by extending simple threshold-based spike detection utilizing a highly sensitive algorithm named SWTTEO. This analysis procedure was applied to data obtained from hESC-derived NS grown on MEA chips. Specifically, we examined changes in the activity pattern occurring within the first ten days of electrical activity. We further analyzed the response of NS to the GABA receptor antagonist bicuculline. With this new algorithm method we obtained more reliable results compared to the simple threshold-based spike detection.
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Silva JM, Caridade SG, Oliveira NM, Reis RL, Mano JF. Chitosan–alginate multilayered films with gradients of physicochemical cues. J Mater Chem B 2015; 3:4555-4568. [DOI: 10.1039/c5tb00082c] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A new approach was used to create multilayered films with gradients of physicochemical properties. This approach shows promise for the development of other types of gradients, which will be useful to mimic extracellular architecture.
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Affiliation(s)
- Joana M. Silva
- 3B's Research Group – Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence of Tissue Engineering and Regenerative Medicine
- Avepark – Parque de Ciência e Tecnologia
| | - Sofia G. Caridade
- 3B's Research Group – Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence of Tissue Engineering and Regenerative Medicine
- Avepark – Parque de Ciência e Tecnologia
| | - Nuno M. Oliveira
- 3B's Research Group – Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence of Tissue Engineering and Regenerative Medicine
- Avepark – Parque de Ciência e Tecnologia
| | - Rui L. Reis
- 3B's Research Group – Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence of Tissue Engineering and Regenerative Medicine
- Avepark – Parque de Ciência e Tecnologia
| | - João F. Mano
- 3B's Research Group – Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence of Tissue Engineering and Regenerative Medicine
- Avepark – Parque de Ciência e Tecnologia
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Gaudière F, Morin-Grognet S, Bidault L, Lembré P, Pauthe E, Vannier JP, Atmani H, Ladam G, Labat B. Genipin-Cross-Linked Layer-by-Layer Assemblies: Biocompatible Microenvironments To Direct Bone Cell Fate. Biomacromolecules 2014; 15:1602-11. [DOI: 10.1021/bm401866w] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Fabien Gaudière
- Laboratoire
de Biophysique et Biomatériaux (La2B), MERCI EA 3829, University of Rouen, Centre Universitaire d’Évreux, 1 rue du 7ème Chasseurs, 27002 Évreux Cedex, France
| | - Sandrine Morin-Grognet
- Laboratoire
de Biophysique et Biomatériaux (La2B), MERCI EA 3829, University of Rouen, Centre Universitaire d’Évreux, 1 rue du 7ème Chasseurs, 27002 Évreux Cedex, France
| | - Laurent Bidault
- ERRMECe EA 1391, University of Cergy-Pontoise, 2 avenue Adolphe Chauvin, 95302 Cergy-Pontoise Cedex, France
| | - Pierre Lembré
- ERRMECe EA 1391, University of Cergy-Pontoise, 2 avenue Adolphe Chauvin, 95302 Cergy-Pontoise Cedex, France
| | - Emmanuel Pauthe
- ERRMECe EA 1391, University of Cergy-Pontoise, 2 avenue Adolphe Chauvin, 95302 Cergy-Pontoise Cedex, France
| | - Jean-Pierre Vannier
- Laboratoire
de Biophysique et Biomatériaux (La2B), MERCI EA 3829, University of Rouen, Centre Universitaire d’Évreux, 1 rue du 7ème Chasseurs, 27002 Évreux Cedex, France
| | - Hassan Atmani
- Laboratoire
de Biophysique et Biomatériaux (La2B), MERCI EA 3829, University of Rouen, Centre Universitaire d’Évreux, 1 rue du 7ème Chasseurs, 27002 Évreux Cedex, France
| | - Guy Ladam
- Laboratoire
de Biophysique et Biomatériaux (La2B), MERCI EA 3829, University of Rouen, Centre Universitaire d’Évreux, 1 rue du 7ème Chasseurs, 27002 Évreux Cedex, France
| | - Béatrice Labat
- Laboratoire
de Biophysique et Biomatériaux (La2B), MERCI EA 3829, University of Rouen, Centre Universitaire d’Évreux, 1 rue du 7ème Chasseurs, 27002 Évreux Cedex, France
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Abstract
In the highly metastatic B16F10 melanoma cell line, activation of the signalling molecules that promote cell proliferation and survival on conventional adhesive culture dishes may also be responsible for the growth and resistance to anoikis of aggregates on a non-adhesive substratum. We have examined the influence of bacterial ADP-ribosyltransferases C3-like exoenzymes, which selectively modify RhoA, B and C proteins and inhibit signal pathways controlled by them. RNA interference [siRNA (small interfering RNA) Akt (also known as protein kinase B)] and a PI3K (phosphoinositide 3-kinase) inhibitor were used to analyse the changes caused by inhibiting the PI3K/Akt pathway. Inhibiting the activation of RhoA, B, C and Akt expression resulted in a decrease of the number of cells cultured in aggregates, and caspase 3 activation. RhoA activation and RhoB and RhoC expression were controlled by Akt, but not RhoA expression. Inhibiting Akt and RhoA reduced the expression of α5 integrin, and inactivated FAK (focal adhesion kinase) in B16F10 cells cultured as aggregates. Thus, inhibiting Rho subfamily proteins and Akt expression inactivates the FAK pathway and induces anoikis in anoikis-resistant cells. The activation of RhoA in melanoma cells can depend on PI3K/Akt activation, suggesting that PI3K/Akt is a suitable target for new therapeutic approaches.
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Evenou F, Couderc S, Kim B, Fujii T, Sakai Y. Microfibrillated Cellulose Sheets Coating Oxygen-Permeable PDMS Membranes Induce Rat Hepatocytes 3D Aggregation into Stably-Attached 3D Hemispheroids. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 22:1509-22. [DOI: 10.1163/092050610x513242] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Fanny Evenou
- a Laboratory for Integrated Micro-Mechatronic Systems (LIMMS/CNRS-IIS), Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan; Laboratoire Matière et Systèmes Complexes (MSC), Bâtiment Condorcet, Université Paris Diderot-Paris 7, 75205 Paris Cedex 13, France
| | - Sandrine Couderc
- b Laboratory for Integrated Micro-Mechatronic Systems (LIMMS/CNRS-IIS), Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan; Nikon and Essilor International Joint Research Center Co., Ltd., KSP R&D, Building C10F-1032, 3-2-1 Sakado, Takatsu-ku, Kawasaki-shi, Kanagawa 213-0012, Japan
| | - Beomjoon Kim
- c Institute of Industrial Science (IIS), University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Teruo Fujii
- d Institute of Industrial Science (IIS), University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Yasuyuki Sakai
- e Institute of Industrial Science (IIS), University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
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Koufaki N, Ranella A, Aifantis KE, Barberoglou M, Psycharakis S, Fotakis C, Stratakis E. Controlling cell adhesion via replication of laser micro/nano-textured surfaces on polymers. Biofabrication 2011; 3:045004. [DOI: 10.1088/1758-5082/3/4/045004] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Use of collagen gel as a three-dimensional in vitro model to study electropermeabilization and gene electrotransfer. J Membr Biol 2010; 236:87-95. [PMID: 20640849 DOI: 10.1007/s00232-010-9280-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2009] [Accepted: 06/22/2010] [Indexed: 01/03/2023]
Abstract
Gene electrotransfer is a promising nonviral method that enables transfer of plasmid DNA into cells with electric pulses. Although many in vitro and in vivo studies have been performed, the question of the implied gene electrotransfer mechanisms is largely open. The main obstacle toward efficient gene electrotransfer in vivo is relatively poor mobility of DNA in tissues. Since cells are mechanically coupled to their extracellular environment and act differently compared to standard in vitro conditions, we developed a three-dimensional (3-D) in vitro model of CHO cells embedded in collagen gel as an ex vivo model of tissue to study electropermeabilization and different parameters of gene electrotransfer. For this purpose, we first used propidium iodide to detect electropermeabilization of CHO cells embedded in collagen gel. Then, we analyzed the influence of different concentrations of plasmid DNA and pulse duration on gene electrotransfer efficiency. Our results revealed that even if cells in collagen gel can be efficiently electropermeabilized, gene expression is significantly lower. Gene electrotransfer efficiency in our 3-D in vitro model had similar dependence on concentration of plasmid DNA and pulse duration comparable to in vivo studies, where longer (millisecond) pulses were shown to be more optimal compared to shorter (microsecond) pulses. The presented results demonstrate that our 3-D in vitro model resembles the in vivo situation more closely than conventional 2-D cell cultures and, thus, provides an environment closer to in vivo conditions to study mechanisms of gene electrotransfer.
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13
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Vayssade M, Sengkhamparn N, Verhoef R, Delaigue C, Goundiam O, Vigneron P, Voragen AG, Schols HA, Nagel MD. Antiproliferative and proapoptotic actions of okra pectin on B16F10 melanoma cells. Phytother Res 2009; 24:982-9. [DOI: 10.1002/ptr.3040] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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14
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Generation of a tumor spheroid in a microgravity environment as a 3D model of melanoma. In Vitro Cell Dev Biol Anim 2009; 45:523-34. [PMID: 19533253 DOI: 10.1007/s11626-009-9217-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Accepted: 05/05/2009] [Indexed: 10/20/2022]
Abstract
An in vitro 3D model was developed utilizing a synthetic microgravity environment to facilitate studying the cell interactions. 2D monolayer cell culture models have been successfully used to understand various cellular reactions that occur in vivo. There are some limitations to the 2D model that are apparent when compared to cells grown in a 3D matrix. For example, some proteins that are not expressed in a 2D model are found up-regulated in the 3D matrix. In this paper, we discuss techniques used to develop the first known large, free-floating 3D tissue model used to establish tumor spheroids. The bioreactor system known as the High Aspect Ratio Vessel (HARVs) was used to provide a microgravity environment. The HARVs promoted aggregation of keratinocytes (HaCaT) that formed a construct that served as scaffolding for the growth of mouse melanoma. Although there is an emphasis on building a 3D model with the proper extracellular matrix and stroma, we were able to develop a model that excluded the use of matrigel. Immunohistochemistry and apoptosis assays provided evidence that this 3D model supports B16.F10 cell growth, proliferation, and synthesis of extracellular matrix. Immunofluorescence showed that melanoma cells interact with one another displaying observable cellular morphological changes. The goal of engineering a 3D tissue model is to collect new information about cancer development and develop new potential treatment regimens that can be translated to in vivo models while reducing the use of laboratory animals.
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Muhonen V, Fauveaux C, Olivera G, Vigneron P, Danilov A, Nagel MD, Tuukkanen J. Fibronectin modulates osteoblast behavior on Nitinol. J Biomed Mater Res A 2009; 88:787-96. [PMID: 18381638 DOI: 10.1002/jbm.a.31953] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We have previously demonstrated that primary rat osteoclasts behave differently when cultured on austenite and martensite Nitinol. In this study, we coated the two phases of Nitinol with plasma fibronectin and studied if this modifies the proliferation and cell cycle of MC3T3-E1 osteoblasts. The influence of the crystalline structure of Nitinol on the remodeling and conformation of fibronectin was also studied. The results on austenite demonstrated that fibronectin was more strongly remodeled and the cells spread better compared with the martensite phase. Interestingly, the conformation of the protein showed no differences between austenite and martensite. In addition, fibronectin improved cell proliferation in both phases, but the effect of fibronectin coating was stronger on the austenite surface. In addition, in both Nitinol phases, the proportion of cells in the G(1) phase was observed to grow in the presence of fibronectin. This could indicate cell differentiation on Nitinol.
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Affiliation(s)
- V Muhonen
- Department of Anatomy and Cell Biology, University of Oulu, PO Box 5000, FIN-90014 Oulu, Finland.
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Velzenberger E, El Kirat K, Legeay G, Nagel MD, Pezron I. Characterization of biomaterials polar interactions in physiological conditions using liquid-liquid contact angle measurements: relation to fibronectin adsorption. Colloids Surf B Biointerfaces 2008; 68:238-44. [PMID: 19108996 DOI: 10.1016/j.colsurfb.2008.10.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 10/09/2008] [Accepted: 10/15/2008] [Indexed: 11/18/2022]
Abstract
Wettability of biomaterials surfaces and protein-coated substrates is generally characterized with the sessile drop technique using polar and apolar liquids. This procedure is often performed in air, which does not reflect the physiological conditions. In this study, liquid/liquid contact angle measurements were carried out to be closer to cell culture conditions. This technique allowed us to evaluate the polar contribution to the work of adhesion between an aqueous medium and four selected biomaterials widely used in tissue culture applications: bacteriological grade polystyrene (PS), tissue culture polystyrene (tPS), poly(2-hydroxyethyl methacrylate) film (PolyHEMA), and hydroxypropylmethylcellulose-carboxymethylcellulose bi-layered Petri dish (CEL). The contributions of polar interactions were also estimated on the same biomaterials after fibronectin (Fn) adsorption. The quantity of Fn adsorbed on PS, tPS, PolyHEMA and CEL surfaces was evaluated by using the fluorescein-labeled protein. PolyHEMA and CEL were found to be hydrophilic, tPS was moderately hydrophilic and PS was highly hydrophobic. After Fn adsorption on PS and tPS, a significant increase of the surface polar interaction was observed. On PolyHEMA and CEL, no significant adsorption of Fn was detected and the polar interactions remained unchanged. Finally, an inverse correlation between the polarity of the surfaces and the quantity of adsorbed Fn was established.
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Affiliation(s)
- Elodie Velzenberger
- Université de Technologie de Compiègne, UMR CNRS 6600 Biomécanique et Bioingénierie, BP 20529, 60205 Compiègne cedex, France
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17
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Velzenberger E, Pezron I, Legeay G, Nagel MD, El Kirat K. Probing fibronectin-surface interactions: a multitechnique approach. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:11734-11742. [PMID: 18816077 DOI: 10.1021/la801727p] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The development of adhesive as well as antiadhesive surfaces is essential in various biomaterial applications. In this study, we have used a multidisciplinary approach that combines biological and physicochemical methods to progress in our understanding of cell-surface interactions. Four model surfaces have been used to investigate fibronectin (Fn) adsorption and the subsequent morphology and adhesion of preosteoblasts. Such experimental conditions lead us to distinguish between anti- and proadhesive substrata. Our results indicate that Fn is not able to induce cell adhesion on antiadhesive materials. On adhesive substrata, Fn did not increase the number of adherent cells but favored their spreading. This work also examined Fn-surface interactions using ELISA immunoassays, fluorescent labeling of Fn, and force spectroscopy with Fn-modified tips. The results provided clear evidence of the advantages and limitations of each technique. All of the techniques confirmed the important adsorption of Fn on proadhesive surfaces for cells. By contrast, antiadhesive substrata for cells avoided Fn adsorption. Furthermore, ELISA experiments enabled us to verify the accessibility of cell binding sites to adsorbed Fn molecules.
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Affiliation(s)
- Elodie Velzenberger
- Université de Technologie de Compiègne (UTC), BP 20529, 60205 Compiègne Cedex, France.
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18
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Irons HR, Cullen DK, Shapiro NP, Lambert NA, Lee RH, LaPlaca MC. Three-dimensional neural constructs: a novel platform for neurophysiological investigation. J Neural Eng 2008; 5:333-41. [DOI: 10.1088/1741-2560/5/3/006] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Goundiam O, Nagel MD, Vayssade M. Study of cancer cell survival using an anti-adhesive substratum. Comput Methods Biomech Biomed Engin 2008. [DOI: 10.1080/10255840802297143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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