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Ventisette I, Mattii F, Dallari C, Capitini C, Calamai M, Muzzi B, Pavone FS, Carpi F, Credi C. Gold-Hydrogel Nanocomposites for High-Resolution Laser-Based 3D Printing of Scaffolds with SERS-Sensing Properties. ACS APPLIED BIO MATERIALS 2024; 7:4497-4509. [PMID: 38925631 PMCID: PMC11253086 DOI: 10.1021/acsabm.4c00379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/21/2024] [Accepted: 05/27/2024] [Indexed: 06/28/2024]
Abstract
Although visible light-based stereolithography (SLA) represents an affordable technology for the rapid prototyping of 3D scaffolds for in vitro support of cells, its potential could be limited by the lack of functional photocurable biomaterials that can be SLA-structured at micrometric resolution. Even if innovative photocomposites showing biomimetic, bioactive, or biosensing properties have been engineered by loading inorganic particles into photopolymer matrices, main examples rely on UV-assisted extrusion-based low-resolution processes. Here, SLA-printable composites were obtained by mixing a polyethylene glycol diacrylate (PEGDA) hydrogel with multibranched gold nanoparticles (NPs). NPs were engineered to copolymerize with the PEGDA matrix by implementing a functionalization protocol involving covalent grafting of allylamine molecules that have C═C pendant moieties. The formulations of gold nanocomposites were tailored to achieve high-resolution fast prototyping of composite scaffolds via visible light-based SLA. Furthermore, it was demonstrated that, after mixing with a polymer and after laser structuring, gold NPs still retained their unique plasmonic properties and could be exploited for optical detection of analytes through surface-enhanced Raman spectroscopy (SERS). As a proof of concept, SERS-sensing performances of 3D printed plasmonic scaffolds were successfully demonstrated with a Raman probe molecule (e.g., 4-mercaptobenzoic acid) from the perspective of future extensions to real-time sensing of cell-specific markers released within cultures. Finally, biocompatibility tests preliminarily demonstrated that embedded NPs also played a key role by inducing physiological cell-cytoskeleton rearrangements, further confirming the potentialities of such hybrid nanocomposites as groundbreaking materials in laser-based bioprinting.
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Affiliation(s)
- Isabel Ventisette
- Department
of Industrial Engineering, University of
Florence, Florence 50121, Italy
| | - Francesco Mattii
- European
Laboratory for Non-Linear Spectroscopy, University of Florence, Sesto
Fiorentino 50019, Italy
| | - Caterina Dallari
- European
Laboratory for Non-Linear Spectroscopy, University of Florence, Sesto
Fiorentino 50019, Italy
- National
Institute of Optics–National Research Council, Sesto Fiorentino 50019, Italy
- Department
of Physics and Astronomy, University of
Florence Sesto Fiorentino 50019, Italy
| | - Claudia Capitini
- National
Institute of Optics–National Research Council, Sesto Fiorentino 50019, Italy
- Department
of Physics and Astronomy, University of
Florence Sesto Fiorentino 50019, Italy
| | - Martino Calamai
- European
Laboratory for Non-Linear Spectroscopy, University of Florence, Sesto
Fiorentino 50019, Italy
- National
Institute of Optics–National Research Council, Sesto Fiorentino 50019, Italy
| | - Beatrice Muzzi
- Institute
of Chemistry of Organometallic Compounds–National Research
Council, Sesto Fiorentino 50019, Italy
| | - Francesco S. Pavone
- European
Laboratory for Non-Linear Spectroscopy, University of Florence, Sesto
Fiorentino 50019, Italy
- National
Institute of Optics–National Research Council, Sesto Fiorentino 50019, Italy
- Department
of Physics and Astronomy, University of
Florence Sesto Fiorentino 50019, Italy
| | - Federico Carpi
- Department
of Industrial Engineering, University of
Florence, Florence 50121, Italy
| | - Caterina Credi
- European
Laboratory for Non-Linear Spectroscopy, University of Florence, Sesto
Fiorentino 50019, Italy
- National
Institute of Optics–National Research Council, Sesto Fiorentino 50019, Italy
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2
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Biofabrication of advanced in vitro and ex vivo cancer models for disease modeling and drug screening. FUTURE DRUG DISCOVERY 2021. [DOI: 10.4155/fdd-2020-0034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Bioengineered in vitro models have advanced from 2D cultures and simple 3D cell aggregates to more complex organoids and organ-on-a-chip platforms. This shift has been substantial in cancer research; while simple systems remain in use, multi-tissue type tumor and tissue chips and patient-derived tumor organoids have grown rapidly. These more advanced models offer new tools to cancer researchers based on human tumor physiology and the potential for interactions with nontumor tissue physiology while avoiding critical differences between human and animal biology. In this focused review, the authors discuss the importance of organoid and organ-on-a-chip platforms, with a particular focus on modeling cancer, to highlight oncology-focused in vitro model platform technologies that improve upon the simple 2D cultures and 3D spheroid models of the past.
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Arthur P, Patel N, Surapaneni SK, Mondal A, Gebeyehu A, Bagde A, Kutlehria S, Nottingham E, Singh M. Targeting lung cancer stem cells using combination of Tel and Docetaxel liposomes in 3D cultures and tumor xenografts. Toxicol Appl Pharmacol 2020; 401:115112. [PMID: 32540278 PMCID: PMC7437978 DOI: 10.1016/j.taap.2020.115112] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 05/16/2020] [Accepted: 06/10/2020] [Indexed: 12/15/2022]
Abstract
Cancer stem cells (CSCs) accounts for recurrence and resistance to chemotherapy in various tumors. Efficacy of chemotherapeutic drugs is limited by tumor stromal barriers, which hinder their penetration into deep tumor sites. We have earlier shown telmisartan (Tel) pretreatment prior to Docetaxel (DTX) administration enhances anti-cancer effects in non-small cell lung cancer (NSCLC). Herein, we demonstrated for the first time the efficacy of Docetaxel liposomes (DTXPL) in combination with Tel in 3D cultures of H460 cells by using polysaccharide-based hydrogels (TheWell Biosciences) and also in xenograft model of DTX resistant H460 derived CD133+ lung tumors. DTXPL and Tel combination showed enhanced cytotoxicity in H460 WT 3D cultures by two folds. In H460 3D cultures, Tel pretreatment showed increased liposomal uptake. DTXPL and Tel combination treated tumors showed reduction in tumor volume (p < .001), increased apoptosis and downregulation of CSC markers (p < .01) in H460 WT and DTX resistant CD133+ xenograft models.
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Affiliation(s)
- Peggy Arthur
- College of Pharmacy and Pharmaceutical Sciences, Florida Agricultural and Mechanical University, Tallahassee, FL 32307, USA
| | - Nilkumar Patel
- College of Pharmacy and Pharmaceutical Sciences, Florida Agricultural and Mechanical University, Tallahassee, FL 32307, USA
| | - Sunil Kumar Surapaneni
- College of Pharmacy and Pharmaceutical Sciences, Florida Agricultural and Mechanical University, Tallahassee, FL 32307, USA
| | | | - Aragaw Gebeyehu
- College of Pharmacy and Pharmaceutical Sciences, Florida Agricultural and Mechanical University, Tallahassee, FL 32307, USA
| | - Arvind Bagde
- College of Pharmacy and Pharmaceutical Sciences, Florida Agricultural and Mechanical University, Tallahassee, FL 32307, USA
| | - Shallu Kutlehria
- College of Pharmacy and Pharmaceutical Sciences, Florida Agricultural and Mechanical University, Tallahassee, FL 32307, USA
| | - Ebony Nottingham
- College of Pharmacy and Pharmaceutical Sciences, Florida Agricultural and Mechanical University, Tallahassee, FL 32307, USA
| | - Mandip Singh
- College of Pharmacy and Pharmaceutical Sciences, Florida Agricultural and Mechanical University, Tallahassee, FL 32307, USA.
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On-Chip Construction of Multilayered Hydrogel Microtubes for Engineered Vascular-Like Microstructures. MICROMACHINES 2019; 10:mi10120840. [PMID: 31805688 PMCID: PMC6953073 DOI: 10.3390/mi10120840] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 11/27/2019] [Accepted: 11/30/2019] [Indexed: 12/30/2022]
Abstract
Multilayered and multicellular structures are indispensable for constructing functional artificial tissues. Engineered vascular-like microstructures with multiple layers are promising structures to be functionalized as artificial blood vessels. In this paper, we present an efficient method to construct multilayer microtubes embedding different microstructures based on direct fabrication and assembly inside a microfluidic device. This four-layer microfluidic device has two separate inlets for fabricating various microstructures. We have achieved alternating-layered microtubes by controlling the fabrication, flow, and assembly time of each microstructure, and as well, double-layered microtubes have been built by a two-step assembly method. Modifications of both the inner and outer layers was successfully demonstrated, and the flow conditions during the on-chip assembly were evaluated and optimized. Each microtube was successfully constructed within several minutes, showing the potential applications of the presented method for building engineered vascular-like microstructures with high efficiency.
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Freimark D, Ehlicke F, Czermak P. The Need for Imaging Methods in Bioengineering of Three-Dimensional Cell Cultures. Int J Artif Organs 2018. [DOI: 10.1177/039139881003300403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The analysis of live cells and tissue is gaining increasing importance in research and development. A number of demands are thus being made on the cultivation and analysis of cell response as well. For certain research approaches, in vitro three-dimensional (3D) cultivation best mimics natural conditions. Nevertheless, the imaging of such 3D environments is still a problem. To understand cell function in 3D, a number of in vivo imaging methods have been developed. This article introduces this field and proposes some interesting and promising imaging techniques for this approach.
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Affiliation(s)
- Denise Freimark
- Institute of Biopharmaceutical Technology, University of Applied Sciences Giessen-Friedberg, Giessen - Germany
| | - Franziska Ehlicke
- Institute of Biopharmaceutical Technology, University of Applied Sciences Giessen-Friedberg, Giessen - Germany
| | - Peter Czermak
- Institute of Biopharmaceutical Technology, University of Applied Sciences Giessen-Friedberg, Giessen - Germany
- Department of Chemical Engineering, Kansas State University, Manhattan, Kansas - USA
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Huang H, Yu Y, Hu Y, He X, Usta OB, Yarmush ML. Generation and manipulation of hydrogel microcapsules by droplet-based microfluidics for mammalian cell culture. LAB ON A CHIP 2017; 17:1913-1932. [PMID: 28509918 PMCID: PMC5548188 DOI: 10.1039/c7lc00262a] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Hydrogel microcapsules provide miniaturized and biocompatible niches for three-dimensional (3D) in vitro cell culture. They can be easily generated by droplet-based microfluidics with tunable size, morphology, and biochemical properties. Therefore, microfluidic generation and manipulation of cell-laden microcapsules can be used for 3D cell culture to mimic the in vivo environment towards applications in tissue engineering and high throughput drug screening. In this review of recent advances mainly since 2010, we will first introduce general characteristics of droplet-based microfluidic devices for cell encapsulation with an emphasis on the fluid dynamics of droplet breakup and internal mixing as they directly influence microcapsule's size and structure. We will then discuss two on-chip manipulation strategies: sorting and extraction from oil into aqueous phase, which can be integrated into droplet-based microfluidics and significantly improve the qualities of cell-laden hydrogel microcapsules. Finally, we will review various applications of hydrogel microencapsulation for 3D in vitro culture on cell growth and proliferation, stem cell differentiation, tissue development, and co-culture of different types of cells.
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Affiliation(s)
- Haishui Huang
- Center for Engineering in Medicine, Massachusetts General Hospital,
Harvard Medical School and Shriners Hospitals for Children, Boston, Massachusetts
02114, United States
| | - Yin Yu
- Center for Engineering in Medicine, Massachusetts General Hospital,
Harvard Medical School and Shriners Hospitals for Children, Boston, Massachusetts
02114, United States
| | - Yong Hu
- Center for Engineering in Medicine, Massachusetts General Hospital,
Harvard Medical School and Shriners Hospitals for Children, Boston, Massachusetts
02114, United States
| | - Xiaoming He
- Department of Biomedical Engineering, The Ohio State University,
Columbus, USA
| | - O. Berk Usta
- Center for Engineering in Medicine, Massachusetts General Hospital,
Harvard Medical School and Shriners Hospitals for Children, Boston, Massachusetts
02114, United States
| | - Martin L. Yarmush
- Center for Engineering in Medicine, Massachusetts General Hospital,
Harvard Medical School and Shriners Hospitals for Children, Boston, Massachusetts
02114, United States
- Department of Biomedical Engineering, Rutgers University,
Piscataway, New Jersey 08854, United States
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Yue T, Nakajima M, Tajima H, Fukuda T. Fabrication of Microstructures Embedding Controllable Particles inside Dielectrophoretic Microfluidic Devices. INT J ADV ROBOT SYST 2017. [DOI: 10.5772/55598] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Tao Yue
- Department of Micro-Nano Systems Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
| | - Masahiro Nakajima
- Center for Micro-Nano Mechatronics of Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
| | - Hirotaka Tajima
- Department of Micro-Nano Systems Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
| | - Toshio Fukuda
- Department of Micro-Nano Systems Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
- Center for Micro-Nano Mechatronics of Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
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8
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Dutta DK, Potnis PA, Rhodes K, Wood SC. Wear particles derived from metal hip implants induce the generation of multinucleated giant cells in a 3-dimensional peripheral tissue-equivalent model. PLoS One 2015; 10:e0124389. [PMID: 25894745 PMCID: PMC4403993 DOI: 10.1371/journal.pone.0124389] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 03/13/2015] [Indexed: 11/26/2022] Open
Abstract
Multinucleate giant cells (MGCs) are formed by the fusion of 5 to 15 monocytes or macrophages. MGCs can be generated by hip implants at the site where the metal surface of the device is in close contact with tissue. MGCs play a critical role in the inflammatory processes associated with adverse events such as aseptic loosening of the prosthetic joints and bone degeneration process called osteolysis. Upon interaction with metal wear particles, endothelial cells upregulate pro-inflammatory cytokines and other factors that enhance a localized immune response. However, the role of endothelial cells in the generation of MGCs has not been completely investigated. We developed a three-dimensional peripheral tissue-equivalent model (PTE) consisting of collagen gel, supporting a monolayer of endothelial cells and human peripheral blood mononuclear cells (PBMCs) on top, which mimics peripheral tissue under normal physiological conditions. The cultures were incubated for 14 days with Cobalt chromium alloy (CoCr ASTM F75, 1–5 micron) wear particles. PBMC were allowed to transit the endothelium and harvested cells were analyzed for MGC generation via flow cytometry. An increase in forward scatter (cell size) and in the propidium iodide (PI) uptake (DNA intercalating dye) was used to identify MGCs. Our results show that endothelial cells induce the generation of MGCs to a level 4 fold higher in 3-dimentional PTE system as compared to traditional 2-dimensional culture plates. Further characterization of MGCs showed upregulated expression of tartrate resistant alkaline phosphatase (TRAP) and dendritic cell specific transmembrane protein, (DC-STAMP), which are markers of bone degrading cells called osteoclasts. In sum, we have established a robust and relevant model to examine MGC and osteoclast formation in a tissue like environment using flow cytometry and RT-PCR. With endothelial cells help, we observed a consistent generation of metal wear particle- induced MGCs, which heralds metal on metal hip failures.
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Affiliation(s)
- Debargh K. Dutta
- Department of Biology, Chemistry and Materials Science, Office of Science and Engineering Laboratories, CDRH, FDA, Silver Spring, Maryland, United States of America
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
- * E-mail:
| | - Pushya A. Potnis
- Department of Biology, Chemistry and Materials Science, Office of Science and Engineering Laboratories, CDRH, FDA, Silver Spring, Maryland, United States of America
| | - Kelly Rhodes
- Department of Biology, Chemistry and Materials Science, Office of Science and Engineering Laboratories, CDRH, FDA, Silver Spring, Maryland, United States of America
- University of Maryland, College Park, Maryland, United States of America
| | - Steven C. Wood
- Department of Biology, Chemistry and Materials Science, Office of Science and Engineering Laboratories, CDRH, FDA, Silver Spring, Maryland, United States of America
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9
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Khorshidi S, Solouk A, Mirzadeh H, Mazinani S, Lagaron JM, Sharifi S, Ramakrishna S. A review of key challenges of electrospun scaffolds for tissue-engineering applications. J Tissue Eng Regen Med 2015; 10:715-38. [DOI: 10.1002/term.1978] [Citation(s) in RCA: 323] [Impact Index Per Article: 35.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 09/09/2014] [Accepted: 11/10/2014] [Indexed: 12/26/2022]
Affiliation(s)
- Sajedeh Khorshidi
- Biomedical Engineering Faculty; Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
| | - Atefeh Solouk
- Biomedical Engineering Faculty; Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
| | - Hamid Mirzadeh
- Polymer Engineering Faculty; Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
| | - Saeedeh Mazinani
- Amirkabir Nanotechnology Research Institute (ANTRI); Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
| | - Jose M. Lagaron
- Novel Materials and Nanotechnology Group; IATA-CSIC; Avda Agustı'n Escardino 7 46980 Burjassot Spain
| | - Shahriar Sharifi
- Department of Biomaterials Science and Technology; University of Twente; Enschede The Netherlands
| | - Seeram Ramakrishna
- Nanoscience and Nanotechnology Initiative; National University of Singapore; Singapore
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10
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Li Z, Cui Z. Three-dimensional perfused cell culture. Biotechnol Adv 2013; 32:243-54. [PMID: 24184152 DOI: 10.1016/j.biotechadv.2013.10.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 02/14/2013] [Accepted: 10/07/2013] [Indexed: 12/17/2022]
Abstract
Compelling evidence suggests the limitation and shortcomings of the current and well established cell culture method using multi-well plates, flasks and Petri dishes. These are particularly important when cell functions are sensitive to the local microenvironment, cell-cell and cell-extracellular matrix interactions. There is a clear need for advanced cell culture systems which mimic in vivo and more physiological conditions. This review summarises and analyses recent progress in three dimensional (3D) cell culture with perfusion as the next generation cell culture tools, while excluding engineered tissue culture where three dimensional scaffold has to be used for structural support and perfusion for overcoming mass transfer control. Apart from research activities in academic community, product development in industry is also included in this review.
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Affiliation(s)
- Zhaohui Li
- Institute of Biomedical Engineering, Department of Engineering Science, Oxford University, Oxford, UK
| | - Zhanfeng Cui
- Institute of Biomedical Engineering, Department of Engineering Science, Oxford University, Oxford, UK.
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11
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Soto-Gutierrez A, Wertheim JA, Ott HC, Gilbert TW. Perspectives on whole-organ assembly: moving toward transplantation on demand. J Clin Invest 2012; 122:3817-23. [PMID: 23114604 DOI: 10.1172/jci61974] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
There is an ever-growing demand for transplantable organs to replace acute and chronically damaged tissues. This demand cannot be met by the currently available donor organs. Efforts to provide an alternative source have led to the development of organ engineering, a discipline that combines cell biology, tissue engineering, and cell/organ transplantation. Over the last several years, engineered organs have been implanted into rodent recipients and have shown modest function. In this article, we summarize the most recent advances in this field and provide a perspective on the challenges of translating this promising new technology into a proven regenerative therapy.
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Affiliation(s)
- Alejandro Soto-Gutierrez
- Department of Pathology, Transplantation Section of Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA.
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Chan V, Zorlutuna P, Jeong JH, Kong H, Bashir R. Three-dimensional photopatterning of hydrogels using stereolithography for long-term cell encapsulation. LAB ON A CHIP 2010; 10:2062-2070. [PMID: 20603661 DOI: 10.1039/c004285d] [Citation(s) in RCA: 274] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Cell-encapsulated hydrogels with complex three-dimensional (3D) structures were fabricated from photopolymerizable poly(ethylene glycol) diacrylate (PEGDA) using modified 'top-down' and 'bottoms-up' versions of a commercially available stereolithography apparatus (SLA). Swelling and mechanical properties were measured for PEGDA hydrogels with molecular weights (M(w)) ranging from 700 to 10 000 Daltons (Da). Long-term viability of encapsulated NIH/3T3 cells was quantitatively evaluated using an MTS assay and shown to improve over 14 days by increasing the M(w) of the hydrogels. Addition of adhesive RGDS peptide sequences resulted in increased cell viability, proliferation, and spreading compared to pristine PEG hydrogels of the same M(w). Spatial 3D layer-by-layer cell patterning was successfully demonstrated, and the feasibility of depositing multiple cell types and material compositions into distinct layers was established.
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Affiliation(s)
- Vincent Chan
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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Nwe N, Furuike T, Tamura H. Selection of a biopolymer based on attachment, morphology and proliferation of fibroblast NIH/3T3 cells for the development of a biodegradable tissue regeneration template: Alginate, bacterial cellulose and gelatin. Process Biochem 2010. [DOI: 10.1016/j.procbio.2009.11.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Hackett JM, Ferguson C, Dare E, McLaughlin CR, Griffith M. Optimal neural differentiation and extension of hybrid neuroblastoma cells (NDC) for nerve-target evaluations using a multifactorial approach. Toxicol In Vitro 2009; 24:567-77. [PMID: 19883748 DOI: 10.1016/j.tiv.2009.10.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2009] [Revised: 10/25/2009] [Accepted: 10/26/2009] [Indexed: 02/06/2023]
Abstract
In vitro models of tissues, such as the cornea, represent systems for modeling cell-to-cell interactions and tissue function. The objective of this study was to develop an optimized nerve differentiation medium to incorporate into a 3D in vitro model to study innervation and cell targeting. A hybrid neuroblastoma cell line (NDC) was examined for its ability to differentiate into neurons, produce neurites, and functionally contact target cells. Neuronal differentiation of NDCs was optimized through a combinatorial approach which involved culturing cells in the presence of various extracellular matrices and soluble factors. A serum-free medium containing nerve growth factor (NGF), dimethyl sulfoxide (DMSO), or dexamethasone resulted in the greatest proportion of NDCs demonstrating a neuronal morphology. Similarly, with supplementation of cyclic AMP (cAMP) or NGF, neurite extension was optimized. Combining these factors generated an optimized differentiation and extension medium, relative to the individual components alone. In co-culture with epithelial cells, NDC neurites generated in the optimized medium formed contacts with epithelial targets and produced substance P. Similarly, NDCs seeded into a collagen matrix produced neurites that projected through the matrix to target epithelial cells, promoted epithelial stratification, and increased the rate of epithelial wound healing. As well, differentiated NDCs could target and alter acetylcholine receptor clustering in mouse C2C12 myotubes, demonstrating synaptic plasticity. Our data supports the use of NDCs, in combination with optimized medium, for generating an innervated in vitro model.
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Affiliation(s)
- J M Hackett
- Ottawa Hospital Research Institute, 501 Smyth Road, Ottawa, ON, Canada, K1H 8L6.
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16
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Modelling tissues in 3D: the next future of pharmaco-toxicology and food research? GENES AND NUTRITION 2008; 4:13-22. [PMID: 19104883 DOI: 10.1007/s12263-008-0107-0] [Citation(s) in RCA: 155] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2008] [Accepted: 11/25/2008] [Indexed: 01/16/2023]
Abstract
The development and validation of reliable in vitro methods alternative to conventional in vivo studies in experimental animals is a well-recognised priority in the fields of pharmaco-toxicology and food research. Conventional studies based on two-dimensional (2-D) cell monolayers have demonstrated their significant limitations: the chemically and spatially defined three-dimensional (3-D) network of extracellular matrix components, cell-to-cell and cell-to-matrix interactions that governs differentiation, proliferation and function of cells in vivo is, in fact, lost under the simplified 2-D condition. Being able to reproduce specific tissue-like structures and to mimic functions and responses of real tissues in a way that is more physiologically relevant than what can be achieved through traditional 2-D cell monolayers, 3-D cell culture represents a potential bridge to cover the gap between animal models and human studies. This article addresses the significance and the potential of 3-D in vitro systems to improve the predictive value of cell-based assays for safety and risk assessment studies and for new drugs development and testing. The crucial role of tissue engineering and of the new microscale technologies for improving and optimising these models, as well as the necessity of developing new protocols and analytical methods for their full exploitation, will be also discussed.
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17
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Crabb RAB, Hubel A. Influence of matrix processing on the optical and biomechanical properties of a corneal stroma equivalent. Tissue Eng Part A 2008; 14:173-82. [PMID: 18333815 DOI: 10.1089/ten.a.2007.0139] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Interest in developing tissue-engineered cornea has increased with the decrease in the supply of donor tissue; however, the high strength and transparency of the cornea present a challenge. Both the collagen processing and crosslinking methods were hypothesized to influence the optical and biomechanical properties of collagen matrices, while regular surface topography was hypothesized to align stromal fibroblasts. Improved transparency and strength were observed when soluble tropocollagen was added to the insoluble collagen and when glucose-mediated ultraviolet (UV) crosslinking as opposed to dehydrothermal crosslinking was used. The fraction of transmittance of the collagen films fabricated from insoluble collagen and soluble tropocollagen and glucose-mediated UV crosslinking was initially 0.91 +/- 0.02 and 0.98 +/- 0.01 for the smooth films and 0.90 +/- 0.02 and 0.97 +/- 0.02 for the microgrooved films at 400 and 700 nm and was comparable to that of the native cornea, while the relaxed modulus and ultimate tensile strength ranged from 0.9 to 9.4 MPa and from 0.7 to 4.1 MPa, respectively, over the 3 weeks of culture and were initially at or below the range of values for the native cornea. These collagen scaffolds were significantly stronger and more transparent than previous scaffolds, and aligned stromal fibroblasts were observed on microgrooved surfaces.
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Affiliation(s)
- Rachael A B Crabb
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA
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18
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Crabb RA, Hubel A. Influence of Matrix Processing on the Optical and Biomechanical Properties of a Corneal Stroma Equivalent. ACTA ACUST UNITED AC 2008. [DOI: 10.1089/ten.2007.0139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Cho E, Li WJ. Human stem cells, chromatin, and tissue engineering: Boosting relevancy in developmental toxicity testing. ACTA ACUST UNITED AC 2007; 81:20-40. [PMID: 17539011 DOI: 10.1002/bdrc.20088] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Risk assessment derives its confidence from toxicology research that is based on relevancy to human health. This article focuses on two highly topical areas of current scientific research, stem cells and chromatin biology, which present new avenues for preclinical and clinical applications, and the frontier role of tissue engineering and regeneration. Appreciating the utility and necessity of chromatin and human somatic stem cells as research tools and looking toward tissue engineering may close the uncertainty gaps between animal and human cross-species toxicology evaluations. The focus will be on developmental toxicology applications, but appropriate extrapolation to any other areas of toxicology can be made. We further provide background on basic biology of these three areas and examples of how early life exposure to known and potential environmental toxicants induce malformations, childhood and adult-onset diseases, through aberrant chromatin modification of critical gene expressions (acute lymphocyte leukemia, heavy-metal nickel and cadmium-associated defects, and reproductive tract malformations and carcinomas induced by the synthetic estrogen, diethylstilbestrol).
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Affiliation(s)
- Elizabeth Cho
- Cartilage Biology and Orthopaedics Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA.
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Abstract
The emergence of tissue engineering raises new possibilities for the study of complex physiological and pathophysiological processes in vitro. Many tools are now available to create 3D tissue models in vitro, but the blueprints for what to make have been slower to arrive. We discuss here some of the 'design principles' for recreating the interwoven set of biochemical and mechanical cues in the cellular microenvironment, and the methods for implementing them. We emphasize applications that involve epithelial tissues for which 3D models could explain mechanisms of disease or aid in drug development.
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Affiliation(s)
- Linda G Griffith
- Biological Engineering Division, Mechanical Engineering Department and Biotech/Pharma Engineering Center, Massachusetts Institute of Technology, 16-429, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
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