1
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Tam NW, Schullian O, Cipitria A, Dimova R. Nonspecific membrane-matrix interactions influence diffusivity of lipid vesicles in hydrogels. Biophys J 2024; 123:638-650. [PMID: 38332584 PMCID: PMC10938137 DOI: 10.1016/j.bpj.2024.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/13/2023] [Accepted: 02/05/2024] [Indexed: 02/10/2024] Open
Abstract
The diffusion of extracellular vesicles and liposomes in vivo is affected by different tissue environmental conditions and is of great interest in the development of liposome-based therapeutics and drug-delivery systems. Here, we use a bottom-up biomimetic approach to better isolate and study steric and electrostatic interactions and their influence on the diffusivity of synthetic large unilamellar vesicles in hydrogel environments. Single-particle tracking of these extracellular vesicle-like particles in agarose hydrogels as an extracellular matrix model shows that membrane deformability and surface charge affect the hydrogel pore spaces that vesicles have access to, which determines overall diffusivity. Moreover, we show that passivation of vesicles with PEGylated lipids, as often used in drug-delivery systems, enhances diffusivity, but that this effect cannot be fully explained with electrostatic interactions alone. Finally, we compare our experimental findings with existing computational and theoretical work in the field to help explain the nonspecific interactions between diffusing particles and gel matrix environments.
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Affiliation(s)
- Nicky W Tam
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, Potsdam, Germany
| | - Otto Schullian
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, Potsdam, Germany; Free University of Berlin, Department of Physics, Berlin, Germany
| | - Amaia Cipitria
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, Potsdam, Germany; Group of Bioengineering in Regeneration and Cancer, Biogipuzkoa Health Research Institute, San Sebastián, Spain; IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Rumiana Dimova
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, Potsdam, Germany.
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2
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Quoniou R, Moreau E, Cachin F, Miot-Noirault E, Chautard E, Peyrode C. 3D Coculture between Cancer Cells and Macrophages: From Conception to Experimentation. ACS Biomater Sci Eng 2024; 10:313-325. [PMID: 38110331 DOI: 10.1021/acsbiomaterials.3c01437] [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] [Indexed: 12/20/2023]
Abstract
A tumor is a complex cluster with many types of cells in the microenvironment that help it grow. Macrophages, immune cells whose main role is to maintain body homeostasis, represent in the majority of cancers the most important cell population. In this context, they are called tumor-associated macrophages (TAMs) because of their phenotype, which contributes to tumor growth. In order to limit the use of animals, there is a real demand for the creation of in vitro models able to represent more specifically the complexity of the tumor microenvironment (TME) in order to characterize it and evaluate new treatments. However, the two-dimensional (2D) culture, which has been used for a long time, has shown many limitations, especially in terms of tumor representation. The three-dimensional (3D) models, developed over the last 20 years, have made it possible to get closer to what happens in vivo in terms of phenotypic and functional characteristics. Due to their architectural similarity to in vivo tissues, they provide a more physiologically relevant in vitro system. Most recently, it is the development of 3D coculture models in which two or three cell lines are cultured together that has allowed a better representation of TME with cell-cell interactions. Unfortunately, there is no clear direction for the design of these models at this time. In this Review on the coculture between cancer cells and TAMs, an in-depth analysis is performed to answer multiple questions on the conception of these models: Which models to use, and with which material and cancer lineage? Which monocyte or macrophage lines should be added to the coculture? And how can these models be exploited?
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Affiliation(s)
- Rohan Quoniou
- Imagerie Moléculaire et Stratégies Théranostiques, UMR1240, Université Clermont Auvergne, INSERM, 63000 Clermont-Ferrand, France
| | - Emmanuel Moreau
- Imagerie Moléculaire et Stratégies Théranostiques, UMR1240, Université Clermont Auvergne, INSERM, 63000 Clermont-Ferrand, France
| | - Florent Cachin
- Imagerie Moléculaire et Stratégies Théranostiques, UMR1240, Université Clermont Auvergne, INSERM, 63000 Clermont-Ferrand, France
- Service de Médecine Nucléaire, Centre Jean Perrin, 63000 Clermont-Ferrand, France
| | - Elisabeth Miot-Noirault
- Imagerie Moléculaire et Stratégies Théranostiques, UMR1240, Université Clermont Auvergne, INSERM, 63000 Clermont-Ferrand, France
| | - Emmanuel Chautard
- Imagerie Moléculaire et Stratégies Théranostiques, UMR1240, Université Clermont Auvergne, INSERM, 63000 Clermont-Ferrand, France
- Service de Pathologie, Centre Jean Perrin, 63000 Clermont-Ferrand, France
| | - Caroline Peyrode
- Imagerie Moléculaire et Stratégies Théranostiques, UMR1240, Université Clermont Auvergne, INSERM, 63000 Clermont-Ferrand, France
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3
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Zhu H, Roode LW, Parry AJ, Erkamp NA, Rodriguez-Garcia M, Narita M, Shen Y, Ou Y, Toprakcioglu Z, Narita M, Knowles TP. Core–Shell Spheroid‐Laden Microgels Crosslinked under Biocompatible Conditions for Probing Cancer‐Stromal Communication. ADVANCED NANOBIOMED RESEARCH 2022. [DOI: 10.1002/anbr.202200138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Hongjia Zhu
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Lianne W.Y. Roode
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Aled J. Parry
- Cancer Research UK Cambridge Institute University of Cambridge Li Ka Shing Centre, Robinson Way Cambridge CB2 0RE UK
| | - Nadia A. Erkamp
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Marc Rodriguez-Garcia
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Masako Narita
- Cancer Research UK Cambridge Institute University of Cambridge Li Ka Shing Centre, Robinson Way Cambridge CB2 0RE UK
| | - Yi Shen
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Yangteng Ou
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Zenon Toprakcioglu
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Masashi Narita
- Cancer Research UK Cambridge Institute University of Cambridge Li Ka Shing Centre, Robinson Way Cambridge CB2 0RE UK
- Tokyo Tech World Research Hub Initiative (WRHI) Institute of Innovative Research Tokyo Institute of Technology Yokohama, Tokyo 152-8550 Japan
| | - Tuomas P.J. Knowles
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
- Department of Physics University of Cambridge JJ Thomson Avenue Cambridge CB3 0HE UK
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4
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Xu Y, Zhu H, Denduluri A, Ou Y, Erkamp NA, Qi R, Shen Y, Knowles TPJ. Recent Advances in Microgels: From Biomolecules to Functionality. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2200180. [PMID: 35790106 DOI: 10.1002/smll.202200180] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 03/15/2022] [Indexed: 06/15/2023]
Abstract
The emerging applications of hydrogel materials at different length scales, in areas ranging from sustainability to health, have driven the progress in the design and manufacturing of microgels. Microgels can provide miniaturized, monodisperse, and regulatable compartments, which can be spatially separated or interconnected. These microscopic materials provide novel opportunities for generating biomimetic cell culture environments and are thus key to the advances of modern biomedical research. The evolution of the physical and chemical properties has, furthermore, highlighted the potentials of microgels in the context of materials science and bioengineering. This review describes the recent research progress in the fabrication, characterization, and applications of microgels generated from biomolecular building blocks. A key enabling technology allowing the tailoring of the properties of microgels is their synthesis through microfluidic technologies, and this paper highlights recent advances in these areas and their impact on expanding the physicochemical parameter space accessible using microgels. This review finally discusses the emerging roles that microgels play in liquid-liquid phase separation, micromechanics, biosensors, and regenerative medicine.
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Affiliation(s)
- Yufan Xu
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Hongjia Zhu
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Akhila Denduluri
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Yangteng Ou
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Nadia A Erkamp
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Runzhang Qi
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Yi Shen
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
- The University of Sydney Nano Institute, University of Sydney, Sydney, NSW, 2006, Australia
| | - Tuomas P J Knowles
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
- Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, UK
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5
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Kim C, Choi WJ, Kang W. Cavitation nucleation and its ductile-to-brittle shape transition in soft gels under translational mechanical impact. Acta Biomater 2022; 142:160-173. [PMID: 35189381 DOI: 10.1016/j.actbio.2022.02.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 02/08/2022] [Accepted: 02/14/2022] [Indexed: 02/05/2023]
Abstract
Cavitation bubbles in the human body, when subjected to impact, are being increasingly considered as a possible brain injury mechanism. However, the onset of cavitation and its complex dynamics in biological materials remain unclear. Our experimental results using soft gels as a tissue simulant show that the critical acceleration (acr) at cavitation nucleation monotonically increases with increasing stiffness of gelatin A/B, while acr for agarose and agar initially increases but is followed by a plateau or even decrease after stiffness reach to ∼100 kPa. Our image analyses of cavitation bubbles and theoretical work reveal that the observed trends in acr are directly linked to how bubbles grow in each gel. Gelatin A/B, regardless of their stiffness, form a localized damaged zone (tens of nanometers) at the gel-bubble interface during bubble growth. In contrary, the damaged zone in agar/agarose becomes significantly larger (> 100 times) with increasing shear modulus, which triggers the transition from formation of a small, damaged zone to activation of crack propagation. STATEMENT OF SIGNIFICANCE: We have studied cavitation nucleation and bubble growth in four different types of soft gels (i.e., tissue simulants) under translational impact. The critical linear acceleration for cavitation nucleation has been measured in the simulants by utilizing a recently developed method that mimics acceleration profiles of typical head blunt events. Each gel type exhibits significantly different trends in the critical acceleration and bubble shape (e.g., A gel-specific sphere-to-saucer transition) with increasing gel stiffness. Our theoretical framework, based on the concepts of a damaged zone and crack propagation in each gel, explains underlying mechanisms of the experimental observations. Our in-depth studies shed light on potential links between traumatic brain injuries and cavitation bubbles induced by translational acceleration, the overlooked mechanism in the literature.
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Affiliation(s)
- Chunghwan Kim
- Mechanical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ 85281, United States
| | - Won June Choi
- Mechanical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ 85281, United States
| | - Wonmo Kang
- Mechanical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ 85281, United States.
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6
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Braccini S, Tacchini C, Chiellini F, Puppi D. Polymeric Hydrogels for In Vitro 3D Ovarian Cancer Modeling. Int J Mol Sci 2022; 23:3265. [PMID: 35328686 PMCID: PMC8954571 DOI: 10.3390/ijms23063265] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 12/12/2022] Open
Abstract
Ovarian cancer (OC) grows and interacts constantly with a complex microenvironment, in which immune cells, fibroblasts, blood vessels, signal molecules and the extracellular matrix (ECM) coexist. This heterogeneous environment provides structural and biochemical support to the surrounding cells and undergoes constant and dynamic remodeling that actively promotes tumor initiation, progression, and metastasis. Despite the fact that traditional 2D cell culture systems have led to relevant medical advances in cancer research, 3D cell culture models could open new possibilities for the development of an in vitro tumor microenvironment more closely reproducing that observed in vivo. The implementation of materials science and technology into cancer research has enabled significant progress in the study of cancer progression and drug screening, through the development of polymeric scaffold-based 3D models closely recapitulating the physiopathological features of native tumor tissue. This article provides an overview of state-of-the-art in vitro tumor models with a particular focus on 3D OC cell culture in pre-clinical studies. The most representative OC models described in the literature are presented with a focus on hydrogel-based scaffolds, which guarantee soft tissue-like physical properties as well as a suitable 3D microenvironment for cell growth. Hydrogel-forming polymers of either natural or synthetic origin investigated in this context are described by highlighting their source of extraction, physical-chemical properties, and application for 3D ovarian cancer cell culture.
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Affiliation(s)
| | | | | | - Dario Puppi
- BioLab Research Group, Department of Chemistry and Industrial Chemistry, University of Pisa, UdR INSTM-Pisa, Via Moruzzi 13, 56124 Pisa, Italy; (S.B.); (C.T.)
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7
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Polat A, Göktürk D. An alternative approach to tracing the volumic proliferation development of an entire tumor spheroid in 3D through a mini-Opto tomography platform. Micron 2021; 152:103173. [PMID: 34785434 DOI: 10.1016/j.micron.2021.103173] [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: 08/10/2021] [Revised: 10/21/2021] [Accepted: 10/28/2021] [Indexed: 11/17/2022]
Abstract
Microscopy, which is listed among the major in-situ imaging applications, allows to derive information from a biological sample on the existing architectural structures of cells and tissues and their changes over time. Large biological samples such as tumor spheroids cannot be imaged within one field of view, regional imaging in different areas and subsequent stitching are required to attain the full picture. Microscopy is not typically used to produce full-size visualization of tumor spheroids measuring a few millimeters in size. In this study, we propose a 3D volume imaging technique for tracing the growth of an entire tumor spheroid measuring up to 10 mm using a miniaturized optical (mini-Opto) tomography platform. We performed a primary analysis of the 3D imaging for the MIA PaCa-2 pancreatic tumoroid employing its 2D images produced with the mini-Opto tomography from different angles ranging from -25 ° to +25 ° at six different three-day-apart time points of consecutive image acquisition. These 2D images were reconstructed by using a 3D image reconstruction algorithm that we developed based on the algebraic reconstruction technique (ART). We were able to reconstruct the 3D images of the tumoroid to achieve 800 × 800-pixel 50-layer images at resolutions of 5-25 μm. We also created its 3D visuals to understand more clearly how its volume changed and how it looked over weeks. The volume of the tumor was calculated to be 6.761 mm3 at the first imaging time point and 46.899 mm3 15 days after the first (at the sixth time point), which is 6.94 times larger in volume. The mini-Opto tomography can be considered more advantageous than commercial microscopy because it is portable, more cost-effective, and easier to use, and enables full-size visualization of biological samples measuring a few millimeters in size.
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Affiliation(s)
- Adem Polat
- Çanakkale Onsekiz Mart University, Faculty of Engineering, Department of Electronics Engineering, 17100, Çanakkale, Turkey.
| | - Dilek Göktürk
- Adana Alparslan Türkeş Science and Technology University, Faculty of Engineering, Department of Bioengineering, 01250, Adana, Turkey
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8
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The impact of antifouling layers in fabricating bioactive surfaces. Acta Biomater 2021; 126:45-62. [PMID: 33727195 DOI: 10.1016/j.actbio.2021.03.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 02/18/2021] [Accepted: 03/09/2021] [Indexed: 12/18/2022]
Abstract
Bioactive surfaces modified with functional peptides are critical for both fundamental research and practical application of implant materials and tissue repair. However, when bioactive molecules are tethered on biomaterial surfaces, their functions can be compromised due to unwanted fouling (mainly nonspecific protein adsorption and cell adhesion). In recent years, researchers have continuously studied antifouling strategies to obtain low background noise and effectively present the function of bioactive molecules. In this review, we describe several commonly used antifouling strategies and analyzed their advantages and drawbacks. Among these strategies, antifouling molecules are widely used to construct the antifouling layer of various bioactive surfaces. Subsequently, we summarize various structures of antifouling molecules and their surface grafting methods and characteristics. Application of these functionalized surfaces in microarray, biosensors, and implants are also introduced. Finally, we discuss the primary challenges associated with antifouling layers in fabricating bioactive surfaces and provide prospects for the future development of this field. STATEMENT OF SIGNIFICANCE: The nonspecific protein adsorption and cell adhesion will cause unwanted background "noise" on the surface of biological materials and detecting devices and compromise the performance of functional molecules and, therefore, impair the performance of materials and the sensitivity of devices. In addition, the selection of antifouling surfaces with proper chain length and high grafting density is also of great importance and requires further studies. Otherwise, the surface-tethered bioactive molecules may not function in their optimal status or even fail to display their functions. Based on these two critical issues, we summarize antifouling molecules with different structures, variable grafting methods, and diverse applications in biomaterials and biomedical devices reported in literature. Overall, we expect to shed some light on choosing the appropriate antifouling molecules in fabricating bioactive surfaces.
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9
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Agarose-based biomaterials for advanced drug delivery. J Control Release 2020; 326:523-543. [PMID: 32702391 DOI: 10.1016/j.jconrel.2020.07.028] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 07/15/2020] [Accepted: 07/16/2020] [Indexed: 02/03/2023]
Abstract
Agarose is a prominent marine polysaccharide representing reversible thermogelling behavior, outstanding mechanical properties, high bioactivity, and switchable chemical reactivity for functionalization. As a result, agarose has received particular attention in the fabrication of advanced delivery systems as sophisticated carriers for therapeutic agents. The ever-growing use of agarose-based biomaterials for drug delivery systems resulted in rapid growth in the number of related publications, however still, a long way should be paved to achieve FDA approval for most of the proposed products. This review aims at a classification of agarose-based biomaterials and their derivatives applicable for controlled/targeted drug delivery purposes. Moreover, it attempts to deal with opportunities and challenges associated with the future developments ahead of agarose-based biomaterials in the realm of advanced drug delivery. Undoubtedly, this class of biomaterials needs further advancement, and a lot of critical questions have yet to be answered.
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10
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Kang W, Raphael M. Acceleration-induced pressure gradients and cavitation in soft biomaterials. Sci Rep 2018; 8:15840. [PMID: 30367099 PMCID: PMC6203720 DOI: 10.1038/s41598-018-34085-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 10/02/2018] [Indexed: 12/23/2022] Open
Abstract
The transient, dynamic response of soft materials to mechanical impact has become increasingly relevant due to the emergence of numerous biomedical applications, e.g., accurate assessment of blunt injuries to the human body. Despite these important implications, acceleration-induced pressure gradients in soft materials during impact and the corresponding material response, from small deformations to sudden bubble bursts, are not fully understood. Both through experiments and theoretical analyses, we empirically show, using collagen and agarose model systems, that the local pressure in a soft sample is proportional to the square of the sample depth in the impact direction. The critical acceleration that corresponds to bubble bursts increases with increasing gel stiffness. Bubble bursts are also highly sensitive to the initial bubble size, e.g., bubble bursts can occur only when the initial bubble diameter is smaller than a critical size (≈10 μm). Our study gives fundamental insight into the physics of injury mechanisms, from blunt trauma to cavitation-induced brain injury.
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Affiliation(s)
| | - Marc Raphael
- Naval Research Laboratory, Washington, DC, 20375, USA
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11
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Impact of Three-Dimentional Culture Systems on Hepatic Differentiation of Puripotent Stem Cells and Beyond. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018. [PMID: 30357683 DOI: 10.1007/978-981-13-0947-2_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Generation of functional hepatocytes from human pluripotent stem cells (hPSCs) is a vital tool to produce large amounts of human hepatocytes, which hold a great promise for biomedical and regenerative medicine applications. Despite a tremendous progress in developing the differentiation protocols recapitulating the developmental signalling and stages, these resulting hepatocytes from hPSCs yet achieve maturation and functionality comparable to those primary hepatocytes. The absence of 3D milieu in the culture and differentiation of these hepatocytes may account for this, at least partly, thus developing an optimal 3D culture could be a step forward to achieve this aim. Hence, review focuses on current development of 3D culture systems for hepatic differentiation and maturation and the future perspectives of its application.
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12
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Gong X, Mills KL. Large-scale patterning of single cells and cell clusters in hydrogels. Sci Rep 2018; 8:3849. [PMID: 29497104 PMCID: PMC5832855 DOI: 10.1038/s41598-018-21989-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 02/14/2018] [Indexed: 01/24/2023] Open
Abstract
Biophysical properties of the extracellular matrix (ECM) are known to play a significant role in cell behavior. To gain a better understanding of the effects of the biophysical microenvironment on cell behavior, the practical challenge is longitudinally monitoring behavioral variations within a population to make statistically powerful assessments. Population-level measurements mask heterogeneity in cell responses, and large-scale individual cell measurements are often performed in a one-time, snapshot manner after removing cells from their matrix. Here we present an easy and low-cost method for large-scale, longitudinal studies of heterogeneous cell behavior in 3D hydrogel matrices. Using a platform we term "the drop-patterning chip", thousands of cells were simultaneously transferred from microwell arrays and fully embedded, only using the force of gravity, in precise patterns in 3D collagen I or Matrigel. This method allows for throughputs approaching 2D patterning methods that lack phenotypic information on cell-matrix interactions, and does not rely on special equipment and cell treatments that may result in a proximal stiff surface. With a large and yet well-organized group of cells captured in 3D matrices, we demonstrated the capability of locating selected individual cells and monitoring cell division, migration, and proliferation for multiple days.
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Affiliation(s)
- Xiangyu Gong
- Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, 110 8th St, Troy, NY, 12180, USA
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, 110 8th St, Troy, NY, 12180, USA
| | - Kristen L Mills
- Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, 110 8th St, Troy, NY, 12180, USA.
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, 110 8th St, Troy, NY, 12180, USA.
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13
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Park JE, Park MH, Kim MS, Park YR, Yun JI, Cheong HT, Kim M, Choi JH, Lee E, Lee ST. Porcine spermatogonial stem cells self-renew effectively in a three dimensional culture microenvironment. Cell Biol Int 2017; 41:1316-1324. [DOI: 10.1002/cbin.10844] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 08/12/2017] [Indexed: 01/15/2023]
Affiliation(s)
- Ji Eun Park
- Department of Animal Life Science; Kangwon National University; Chuncheon 24341 Korea
| | - Min Hee Park
- Department of Animal Life Science; Kangwon National University; Chuncheon 24341 Korea
| | - Min Seong Kim
- Department of Animal Life Science; Kangwon National University; Chuncheon 24341 Korea
| | - Yeo Reum Park
- College of Veterinary Medicine; Kangwon National University; Chuncheon 24341 Korea
| | - Jung Im Yun
- Division of Animal Resource Science; Kangwon National University; Chuncheon 24341 Korea
| | - Hee Tae Cheong
- College of Veterinary Medicine; Kangwon National University; Chuncheon 24341 Korea
| | - Minseok Kim
- Animal Nutrition and Physiology Team; National Institute of Animal Science, RDA; Wanju 55365 Korea
| | - Jung Hoon Choi
- College of Veterinary Medicine; Kangwon National University; Chuncheon 24341 Korea
| | - Eunsong Lee
- College of Veterinary Medicine; Kangwon National University; Chuncheon 24341 Korea
| | - Seung Tae Lee
- Department of Animal Life Science; Kangwon National University; Chuncheon 24341 Korea
- Division of Applied Animal Science, Department of Animal Life Science, Laboratory of Stem Cell Biomodulation; Kangwon National University; Chuncheon 24341 Korea
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14
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Raczkowska J, Awsiuk K, Prauzner-Bechcicki S, Pabijan J, Zemła J, Budkowski A, Lekka M. Patterning of cancerous cells driven by a combined modification of mechanical and chemical properties of the substrate. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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15
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Han G, Hong D, Lee BS, Ha E, Park JH, Choi IS, Kang SM, Lee JK. Systematic Study of Functionalizable, Non-Biofouling Agarose Films with Protein and Cellular Patterns on Glass Slides. Chem Asian J 2017; 12:846-852. [PMID: 28218479 DOI: 10.1002/asia.201700010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 02/19/2017] [Indexed: 01/28/2023]
Abstract
Herein we demonstrate a systematic investigation of chemically functionalizable, non-biofouling agarose films over large-area glass surfaces. Agarose films, prepared with various concentrations of aqueous agarose, were activated by using periodate oxidation to generate aldehyde groups at the termini of the agarose chains. The non-biofouling efficacy and binding capabilities of the activated films were evaluated by using protein and cellular patterning, performed by using a microarrayer, microcontact printing, and micromolding in capillaries. Characterization by using a fluorescence slide scanner and a scanning-probe microscope revealed that the pore sizes of the agarose films played an important role in achieving desirable film performance; the 0.2 wt % agarose film exhibited the optimum efficacy in this work.
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Affiliation(s)
- Gyeongyeop Han
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu, 41566, South Korea
| | - Daehwa Hong
- Department of Chemistry and Center for Cell-Encapsulation, KAIST, Daejeon, 34141, South Korea
| | - Bong Soo Lee
- Department of Chemistry and Center for Cell-Encapsulation, KAIST, Daejeon, 34141, South Korea
| | - EunRae Ha
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu, 41566, South Korea
| | - Ji Hun Park
- Department of Chemistry and Center for Cell-Encapsulation, KAIST, Daejeon, 34141, South Korea
| | - Insung S Choi
- Department of Chemistry and Center for Cell-Encapsulation, KAIST, Daejeon, 34141, South Korea
| | - Sung Min Kang
- Department of Chemistry, Chungbuk National University, Cheongju, 28644, South Korea
| | - Jungkyu K Lee
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu, 41566, South Korea
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16
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Mignon A, Devisscher D, Vermeulen J, Vagenende M, Martins J, Dubruel P, De Belie N, Van Vlierberghe S. Characterization of methacrylated polysaccharides in combination with amine-based monomers for application in mortar. Carbohydr Polym 2017; 168:173-181. [PMID: 28457438 DOI: 10.1016/j.carbpol.2017.03.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 03/06/2017] [Accepted: 03/11/2017] [Indexed: 11/30/2022]
Abstract
Smart pH-responsive superabsorbent polymers (SAPs) could be useful for self-healing of cracks in mortar. They will swell minimally during the alkaline conditions of mixing, leading to only small macro-pores but will swell stronger with a lower pH when water enters the cracks. As such, polysaccharides (alginate, chitosan and agarose) were methacrylated and cross-linked with amine-based monomers (dimethylaminoethyl methacrylate and dimethylaminopropyl methacrylamide) to induce a varying pH-sensitivity. These materials showed a strong cross-linking efficiency and induced moisture uptake capacities up to 122% at 95% relative humidity with a negligible hysteresis. Additionally, interesting pH-responsive swelling capacities were obtained, especially for SAPs based on chitosan and agarose with values up to 110gwater/gSAP. Most of these materials showed limited hydrolysis in cement filtrate solutions, making them very promising for use in mortar.
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Affiliation(s)
- Arn Mignon
- Magnel Laboratory for Concrete Research, Department of Structural Engineering, Ghent University, Technologiepark Zwijnaarde 904, B-9052 Ghent, Belgium; Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, Building S4-bis, B-9000 Ghent, Belgium.
| | - Dries Devisscher
- Design & Synthesis of Organic Semiconductors, Institute for Materials Research, Hasselt University, Agoralaan 1-Building D, 3590 Diepenbeek, Belgium.
| | - Jolien Vermeulen
- Magnel Laboratory for Concrete Research, Department of Structural Engineering, Ghent University, Technologiepark Zwijnaarde 904, B-9052 Ghent, Belgium.
| | - Maxime Vagenende
- Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, Building S4-bis, B-9000 Ghent, Belgium.
| | - José Martins
- NMR and Structure Analysis Unit, Department of Organic Chemistry, Ghent University, Krijgslaan 281, Building S4 bis, B-9000 Ghent, Belgium.
| | - Peter Dubruel
- Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, Building S4-bis, B-9000 Ghent, Belgium.
| | - Nele De Belie
- Magnel Laboratory for Concrete Research, Department of Structural Engineering, Ghent University, Technologiepark Zwijnaarde 904, B-9052 Ghent, Belgium.
| | - Sandra Van Vlierberghe
- Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, Building S4-bis, B-9000 Ghent, Belgium.
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Picollet-D’hahan N, Dolega ME, Liguori L, Marquette C, Le Gac S, Gidrol X, Martin DK. A 3D Toolbox to Enhance Physiological Relevance of Human Tissue Models. Trends Biotechnol 2016; 34:757-769. [DOI: 10.1016/j.tibtech.2016.06.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 06/17/2016] [Accepted: 06/28/2016] [Indexed: 01/21/2023]
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18
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Li L, Wang W, Ding M, Luo G, Liang Q. Single-Cell-Arrayed Agarose Chip for in Situ Analysis of Cytotoxicity and Genotoxicity of DNA Cross-Linking Agents. Anal Chem 2016; 88:6734-42. [PMID: 27269449 DOI: 10.1021/acs.analchem.6b01008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Development of approach or device to allow continuous multiple measurements, such as integrating cytotoxic and genotoxic analysis, is quite appealing for study of the drug's activity and mechanism of action or resistance. In this study, a single-cell-arrayed agarose chip system was developed to combine cell cultivation with subsequent in situ analysis of cytotoxicity and genotoxicity of the chemotherapeutic agent. The modified alkaline comet assay coupled with the Live/Dead assay was used to monitor the interstrand cross-links (ICLs) formation and the cytotoxic effects in different glioma cell lines. In addition, the ICL-induced double strand breaks (DSBs) was measured on the chip to reflect the level of ICLs indirectly. Compared with the traditional methods, the microarray agarose device offers higher throughput, reproducibility, and robustness, exhibiting good potential for high-content drug screening.
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Affiliation(s)
- Lili Li
- Beijing Key Lab of Microanalytical Methods & Instrumentation, Key Lab of Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
| | - Weixing Wang
- Beijing Key Lab of Microanalytical Methods & Instrumentation, Key Lab of Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
| | - Mingyu Ding
- Beijing Key Lab of Microanalytical Methods & Instrumentation, Key Lab of Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
| | - Guoan Luo
- Beijing Key Lab of Microanalytical Methods & Instrumentation, Key Lab of Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
| | - Qionglin Liang
- Beijing Key Lab of Microanalytical Methods & Instrumentation, Key Lab of Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
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19
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Ogura T, Tsuchiya A, Minas T, Mizuno S. Methods of high integrity RNA extraction from cell/agarose construct. BMC Res Notes 2015; 8:644. [PMID: 26537242 PMCID: PMC4632373 DOI: 10.1186/s13104-015-1627-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 10/26/2015] [Indexed: 01/23/2023] Open
Abstract
Background Agarose hydrogels are widely used for three-dimensional cell scaffolding in tissue engineering and cell biology. Recently, molecular profiles have been obtained with extraction of a minimal volume of RNA using fluorescent-tagged quantitative polymerase chain reaction (qPCR), which requires high integrity RNA. However, the agarose interferes considerably with the quantity and quality of the extracted RNA. Moreover, little is known about RNA integrity when the RNA is extracted from cell/agarose construct. Thus, in order to obtain RNA of sufficient integrity, we examined various extraction methods and addressed reproducible methodologies for RNA extraction from cell/agarose constructs using spectrophotometry and microfluidic capillary electrophoresis. Results With various extraction methods using a mono-phasic solution of phenol and guanidine isothiocyanate, we evaluated quantity and quality of total RNA from cell/agarose construct. Extraction with solution of phenol and guanidine isothiocyanate followed by a silica based membrane filter column gave sufficient RNA integrity number, which allowed us to proceed to fluorescent-tagged qPCR for evaluating various cellular activities. Conclusions The RNA extraction methods using phenol and guanidine isothiocyanate solution and a silica membrane column can be useful for obtaining high integrity RNA from cell/agarose constructs rich in polysaccharide and extracellular matrix. Our study contributes to further investigation using agarose hydrogels and other materials rich in polysaccharide in the field of cellular and tissue engineering.
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Affiliation(s)
- Takahiro Ogura
- Department of Orthopedic Surgery, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St., Boston, MA, 02115, USA.
| | - Akihiro Tsuchiya
- Funabashi Orthopaedic Hospital Sports Medicine Center, 1-833, Hasamacho, Funabashi, Chiba, 274-0822, Japan.
| | - Tom Minas
- Department of Orthopedic Surgery, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St., Boston, MA, 02115, USA.
| | - Shuichi Mizuno
- Department of Orthopedic Surgery, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St., Boston, MA, 02115, USA.
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20
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Krumpholz K, Rogal J, El Hasni A, Schnakenberg U, Bräunig P, Bui-Göbbels K. Agarose-Based Substrate Modification Technique for Chemical and Physical Guiding of Neurons In Vitro. ACS APPLIED MATERIALS & INTERFACES 2015; 7:18769-18777. [PMID: 26237337 DOI: 10.1021/acsami.5b05383] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A new low cost and highly reproducible technique is presented that provides patterned cell culture substrates. These allow for selective positioning of cells and a chemically and mechanically directed guiding of their extensions. The patterned substrates consist of structured agarose hydrogels molded from reusable silicon micro templates. These templates consist of pins arranged equidistantly in squares, connected by bars, which mold corresponding wells and channels in the nonadhesive agarose hydrogel. Subsequent slice production with a standard vibratome, comprising the described template pattern, completes substrate production. Invertebrate neurons of locusts and pond snails are used for this application as they offer the advantage over vertebrate cells as being very large and suitable for cultivation in low cell density. Their neurons adhere to and grow only on the adhesive areas not covered by the agarose. Agarose slices of 50 μm thickness placed on glass, polystyrene, or MEA surfaces position and immobilize the neurons in the wells, and the channels guide their neurite outgrowth toward neighboring wells. In addition to the application with invertebrate neurons, the technique may also provide the potential for the application of a wide range of cell types. Long-term objective is the achievement of isolated low-density neuronal networks on MEAs or different culture substrates for various network analysis applications.
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Affiliation(s)
- Katharina Krumpholz
- Institute for Biology II, RWTH Aachen University , Worringerweg 3, 52074 Aachen, Germany
| | - Julia Rogal
- Institute for Biology II, RWTH Aachen University , Worringerweg 3, 52074 Aachen, Germany
| | - Akram El Hasni
- Institute of Materials in Electrical Engineering 1, RWTH Aachen University , Sommerfeldstraße 24, 52074, Aachen, Germany
| | - Uwe Schnakenberg
- Institute of Materials in Electrical Engineering 1, RWTH Aachen University , Sommerfeldstraße 24, 52074, Aachen, Germany
| | - Peter Bräunig
- Institute for Biology II, RWTH Aachen University , Worringerweg 3, 52074 Aachen, Germany
| | - Katrin Bui-Göbbels
- Institute for Biology II, RWTH Aachen University , Worringerweg 3, 52074 Aachen, Germany
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21
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Sun C, Chu M, Chen W, Jin G, Gong J, Zhu M, Yuan J, Dai J, Wang M, Pan Y, Song Y, Ding X, Du M, Dong J, Zhang Z, Hu Z, Wu T, Shen H. Genetic variants of H2AX gene were associated with PM2.5-modulated DNA damage levels in Chinese Han populations. Mutat Res 2015; 778:41-45. [PMID: 26073471 DOI: 10.1016/j.mrfmmm.2015.05.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 01/20/2015] [Accepted: 05/09/2015] [Indexed: 06/04/2023]
Abstract
Exposure to particulate matter 2.5 (PM2.5) may result in DNA damage. Histone variant H2AX phosphorylation plays a central role in the response to damaged chromatin. In the current study, we investigated whether H2AX gene polymorphisms account for PM2.5-modulated DNA damage levels. A total of 307 healthy urban residents were collected from three cities in southern, central, and northern China, Zhuhai, Wuhan, and Tianjin, respectively. The dust mass concentrations of PM2.5 were detected by Gilian 5000 pumps, and the DNA damage levels were measured using comet assay. Seven potentially functional single nucleotide polymorphisms (SNPs) of H2AX gene were selected and genotyped by Illumina Infinium(®) BeadChip. We found that three SNPs (rs10790283 G > A, rs604714 C > A and rs7759 A > G) were significantly associated with DNA damage levels (adjusted P = 0.002, 0.018 and 0.027, respectively). Significant interactions (P < 0.05) were observed between certain genetic polymorphisms and PM2.5-modulated DNA damage levels. These results suggested that genetic variations of H2AX might be associated with the DNA damage levels in urban residents with different exposure to PM2.5. Further studies with large sample size in independent populations merit validating these findings.
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Affiliation(s)
- Chongqi Sun
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Minjie Chu
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Weihong Chen
- Ministry of Education Key Laboratory for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Guangfu Jin
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Jianhang Gong
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Meng Zhu
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Jing Yuan
- Ministry of Education Key Laboratory for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Juncheng Dai
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Meilin Wang
- Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yun Pan
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Yuanchao Song
- Ministry of Education Key Laboratory for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Xiaojie Ding
- Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Mulong Du
- Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jing Dong
- Epidemiology Branch, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA
| | - Zhengdong Zhang
- Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zhibin Hu
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Tangchun Wu
- Ministry of Education Key Laboratory for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Hongbing Shen
- Department of Epidemiology and Biostatistics, Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, China.
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22
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Robust and versatile pectin-based drug delivery systems. Int J Pharm 2015; 479:265-76. [DOI: 10.1016/j.ijpharm.2014.12.045] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 12/01/2014] [Accepted: 12/19/2014] [Indexed: 12/15/2022]
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Brunborg G, Jackson P, Shaposhnikov S, Dahl H, Azqueta A, Collins AR, Gutzkow KB. High throughput sample processing and automated scoring. Front Genet 2014; 5:373. [PMID: 25389434 PMCID: PMC4211552 DOI: 10.3389/fgene.2014.00373] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 10/06/2014] [Indexed: 01/01/2023] Open
Abstract
The comet assay is a sensitive and versatile method for assessing DNA damage in cells. In the traditional version of the assay, there are many manual steps involved and few samples can be treated in one experiment. High throughput (HT) modifications have been developed during recent years, and they are reviewed and discussed. These modifications include accelerated scoring of comets; other important elements that have been studied and adapted to HT are cultivation and manipulation of cells or tissues before and after exposure, and freezing of treated samples until comet analysis and scoring. HT methods save time and money but they are useful also for other reasons: large-scale experiments may be performed which are otherwise not practicable (e.g., analysis of many organs from exposed animals, and human biomonitoring studies), and automation gives more uniform sample treatment and less dependence on operator performance. The HT modifications now available vary largely in their versatility, capacity, complexity, and costs. The bottleneck for further increase of throughput appears to be the scoring.
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Affiliation(s)
- Gunnar Brunborg
- Department of Chemicals and Radiation, Division of Environmental Medicine, Norwegian Institute of Public HealthOslo, Norway
| | - Petra Jackson
- National Research Centre for the Working EnvironmentCopenhagen, Denmark
| | - Sergey Shaposhnikov
- Department of Nutrition, University of OsloOslo, Norway
- NorGenoTech AS, SkreiaNorway
| | - Hildegunn Dahl
- Department of Chemicals and Radiation, Division of Environmental Medicine, Norwegian Institute of Public HealthOslo, Norway
| | - Amaya Azqueta
- Department of Pharmacology and Toxicology, University of NavarraPamplona, Spain
| | | | - Kristine B. Gutzkow
- Department of Chemicals and Radiation, Division of Environmental Medicine, Norwegian Institute of Public HealthOslo, Norway
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Lewitus DY, Smith KL, Landers J, Neimark AV, Kohn J. Bioactive Agarose Carbon-Nanotube Composites are Capable of Manipulating Brain-Implant Interface. J Appl Polym Sci 2014; 131:10.1002/app.40297. [PMID: 25382868 PMCID: PMC4221857 DOI: 10.1002/app.40297] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Composite electrodes made of the polysaccharide agarose and carbon nanotube fibers (A-CNE) have shown potential to be applied as tissue-compatible, micro-electronic devices. In the present work, A-CNEs were functionalized using neuro-relevant proteins (laminin and alpha-melanocyte stimulating hormone) and implanted in brain tissue for 1 week (acute response) and 4 weeks (chronic response). Qualitative and quantitative analysis of neuronal and immunological responses revealed significant changes in immunological response to implanted materials depending on the type of biomolecule used. The potential to manipulate tissue response through the use of an anti-inflammatory protein, alpha-melanocyte stimulating hormone, was shown in the reduction of astroglia presence near the implant site during the glial scar formation. These results suggest that A-CNEs, which are soft, flexible, and easily made bioactive, have the ability to modify brain tissue response through surface modification as a function of the biomolecule used.
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Affiliation(s)
- Dan Y. Lewitus
- New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, 145 Bevier Rd., Piscataway, NJ 08854, USA
| | - Karen L. Smith
- Wadsworth Center, New York State Department of Health, Empire State Plaza, Albany, NY 12201, USA
| | - John Landers
- Department of Chemical and Biochemical Engineering Rutgers, State University of New Jersey, Piscataway, NJ, 08854, USA
| | - Alexander V. Neimark
- Department of Chemical and Biochemical Engineering Rutgers, State University of New Jersey, Piscataway, NJ, 08854, USA
| | - Joachim Kohn
- New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, 145 Bevier Rd., Piscataway, NJ 08854, USA
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25
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Håkanson M, Cukierman E, Charnley M. Miniaturized pre-clinical cancer models as research and diagnostic tools. Adv Drug Deliv Rev 2014; 69-70:52-66. [PMID: 24295904 PMCID: PMC4019677 DOI: 10.1016/j.addr.2013.11.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 10/09/2013] [Accepted: 11/24/2013] [Indexed: 12/14/2022]
Abstract
Cancer is one of the most common causes of death worldwide. Consequently, important resources are directed towards bettering treatments and outcomes. Cancer is difficult to treat due to its heterogeneity, plasticity and frequent drug resistance. New treatment strategies should strive for personalized approaches. These should target neoplastic and/or activated microenvironmental heterogeneity and plasticity without triggering resistance and spare host cells. In this review, the putative use of increasingly physiologically relevant microfabricated cell-culturing systems intended for drug development is discussed. There are two main reasons for the use of miniaturized systems. First, scaling down model size allows for high control of microenvironmental cues enabling more predictive outcomes. Second, miniaturization reduces reagent consumption, thus facilitating combinatorial approaches with little effort and enables the application of scarce materials, such as patient-derived samples. This review aims to give an overview of the state-of-the-art of such systems while predicting their application in cancer drug development.
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Affiliation(s)
- Maria Håkanson
- CSEM SA, Section for Micro-Diagnostics, 7302 Landquart, Switzerland
| | - Edna Cukierman
- Cancer Biology Program, Fox Chase Cancer Center, Philadelphia, PA 19111, USA.
| | - Mirren Charnley
- Centre for Micro-Photonics and Industrial Research Institute Swinburne, Swinburne University of Technology, Victoria 3122, Australia.
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26
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De Maria C, Rincon J, Duarte AA, Vozzi G, Boland T. A new approach to fabricate agarose microstructures. POLYM ADVAN TECHNOL 2013. [DOI: 10.1002/pat.3162] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Carmelo De Maria
- Research Center E. Piaggio; University of Pisa; Italy
- Let People Move Research Institute; Bioengineering Division; Arezzo Italy
| | - Julio Rincon
- Department of Metallurgical and Materials Engineering; University of Texas at El Paso; Texas USA
| | - Alonso A. Duarte
- Department of Metallurgical and Materials Engineering; University of Texas at El Paso; Texas USA
| | | | - Thomas Boland
- Department of Metallurgical and Materials Engineering; University of Texas at El Paso; Texas USA
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27
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Ramos AA, Pedro DFN, Lima CF, Collins AR, Pereira-Wilson C. Development of a new application of the comet assay to assess levels of O6-methylguanine in genomic DNA (CoMeth). Free Radic Biol Med 2013; 60:41-8. [PMID: 23391575 DOI: 10.1016/j.freeradbiomed.2013.01.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 01/28/2013] [Accepted: 01/29/2013] [Indexed: 11/27/2022]
Abstract
O(6)-methylguanine (O(6)meG) is one of the most premutagenic, precarcinogenic, and precytotoxic DNA lesions formed by alkylating agents. Repair of this DNA damage is achieved by the protein MGMT, which transfers the alkyl groups from the O(6) position of guanine to a cysteine residue in its active center. Because O(6)meG repair by MGMT is a stoichiometric reaction that irreversibly inactivates MGMT, which is subsequently degraded, the repair capacity of O(6)meG lesions is dependent on existing active MGMT molecules. In the absence of active MGMT, O(6)meG is not repaired, and during replication, O(6)meG:T mispairs are formed. The MMR system recognizes these mispairs and introduces a gap into the strand. If O(6)meG remains in one of the template strands the futile MMR repair process will be repeated, generating more strand breaks (SBs). The toxicity of O(6)meG is, therefore, dependent on MMR and DNA SB induction of cell death. MGMT, on the other hand, protects against O(6)meG toxicity by removing the methyl residue from the guanine. Although removal of O(6)meG makes MGMT an important anticarcinogenic mechanism of DNA repair, its activity significantly decreases the efficacy of cancer chemotherapeutic drugs that aim at achieving cell death through the action of the MMR system on unrepaired O(6)meG lesions. Here, we report on a modification of the comet assay (CoMeth) that allows the qualitative assessment of O(6)meG lesions after their conversion to strand breaks in proliferating MMR-proficient cells after MGMT inhibition. This functional assay allows the testing of compounds with effects on O(6)meG levels, as well as on MGMT or MMR activity, in a proliferating cell system. The expression of MGMT and MMR genes is often altered by promoter methylation, and new epigenetically active compounds are being designed to increase chemotherapeutic efficacy. The CoMeth assay allows the testing of compounds with effects on O(6)meG, MGMT, or MMR activity. This proliferating cell system complements other methodologies that look at effects on these parameters individually through analytical chemistry or in vitro assays with recombinant proteins.
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Affiliation(s)
- Alice A Ramos
- Center of Molecular and Environmental Biology, Department of Biology, School of Sciences, University of Minho, 4710-057 Braga, Portugal
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28
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Azqueta A, Collins AR. The essential comet assay: a comprehensive guide to measuring DNA damage and repair. Arch Toxicol 2013; 87:949-68. [PMID: 23685795 DOI: 10.1007/s00204-013-1070-0] [Citation(s) in RCA: 302] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 04/29/2013] [Indexed: 02/08/2023]
Abstract
The comet assay (single cell gel electrophoresis) is the most common method for measuring DNA damage in eukaryotic cells or disaggregated tissues. The assay depends on the relaxation of supercoiled DNA in agarose-embedded nucleoids (the residual bodies remaining after lysis of cells with detergent and high salt), which allows the DNA to be drawn out towards the anode under electrophoresis, forming comet-like images as seen under fluorescence microscopy. The relative amount of DNA in the comet tail indicates DNA break frequency. The assay has been modified to detect various base alterations, by including digestion of nucleoids with a lesion-specific endonuclease. We describe here recent technical developments, theoretical aspects, limitations as well as advantages of the assay, and modifications to measure cellular antioxidant status and different types of DNA repair. We briefly describe the applications of this method in genotoxicity testing, human biomonitoring, and ecogenotoxicology.
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Affiliation(s)
- Amaya Azqueta
- Department of Pharmacology and Toxicology, University of Navarra, C/Irunlarrea 1, 31009 Pamplona, Spain.
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Assessment of multidrug resistance on cell coculture patterns using scanning electrochemical microscopy. Proc Natl Acad Sci U S A 2013; 110:9249-54. [PMID: 23686580 DOI: 10.1073/pnas.1214809110] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The emergence of resistance to multiple unrelated chemotherapeutic drugs impedes the treatment of several cancers. Although the involvement of ATP-binding cassette transporters has long been known, there is no in situ method capable of tracking this transporter-related resistance at the single-cell level without interfering with the cell's environment or metabolism. Here, we demonstrate that scanning electrochemical microscopy (SECM) can quantitatively and noninvasively track multidrug resistance-related protein 1-dependent multidrug resistance in patterned adenocarcinoma cervical cancer cells. Nonresistant human cancer cells and their multidrug resistant variants are arranged in a side-by-side format using a stencil-based patterning scheme, allowing for precise positioning of target cells underneath the SECM sensor. SECM measurements of the patterned cells, performed with ferrocenemethanol and [Ru(NH3)6](3+) serving as electrochemical indicators, are used to establish a kinetic "map" of constant-height SECM scans, free of topography contributions. The concept underlying the work described herein may help evaluate the effectiveness of treatment administration strategies targeting reduced drug efflux.
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30
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Li Y, Feng X, Du W, Li Y, Liu BF. Ultrahigh-Throughput Approach for Analyzing Single-Cell Genomic Damage with an Agarose-Based Microfluidic Comet Array. Anal Chem 2013; 85:4066-73. [DOI: 10.1021/ac4000893] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Yiwei Li
- Britton Chance Center for Biomedical
Photonics at Wuhan
National Laboratory for Optoelectronics−Hubei Bioinformatics
and Molecular Imaging Key Laboratory, Systems Biology Theme, Department
of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan
430074, China
| | - Xiaojun Feng
- Britton Chance Center for Biomedical
Photonics at Wuhan
National Laboratory for Optoelectronics−Hubei Bioinformatics
and Molecular Imaging Key Laboratory, Systems Biology Theme, Department
of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan
430074, China
| | - Wei Du
- Britton Chance Center for Biomedical
Photonics at Wuhan
National Laboratory for Optoelectronics−Hubei Bioinformatics
and Molecular Imaging Key Laboratory, Systems Biology Theme, Department
of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan
430074, China
| | - Ying Li
- Britton Chance Center for Biomedical
Photonics at Wuhan
National Laboratory for Optoelectronics−Hubei Bioinformatics
and Molecular Imaging Key Laboratory, Systems Biology Theme, Department
of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan
430074, China
| | - Bi-Feng Liu
- Britton Chance Center for Biomedical
Photonics at Wuhan
National Laboratory for Optoelectronics−Hubei Bioinformatics
and Molecular Imaging Key Laboratory, Systems Biology Theme, Department
of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan
430074, China
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31
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Azqueta A, Gutzkow KB, Priestley CC, Meier S, Walker JS, Brunborg G, Collins AR. A comparative performance test of standard, medium- and high-throughput comet assays. Toxicol In Vitro 2012; 27:768-73. [PMID: 23261644 DOI: 10.1016/j.tiv.2012.12.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 12/05/2012] [Accepted: 12/07/2012] [Indexed: 10/27/2022]
Abstract
A serious limitation of the conventional comet assay (single cell gel electrophoresis) is the restriction on the number of samples that can be processed in one experiment, imposed by the size of the electrophoresis platform. One approach to increasing throughput is to reduce the size of gels. We here compare the conventional system of two large gels on a microscope slide, with two recent developments, namely 12 minigels per slide, and a format with 96 minigels on GelBond® film. We used cells treated with X-rays or methylmethanesulphonate (MMS). The level of damage detected (% tail DNA) in X-irradiated or MMS-treated cells was not affected by the format used. Parallel experiments, using all three formats, were performed with MMS-treated cells in two independent laboratories; the difference in results between the two laboratories was of borderline significance. The potential problem of anomalous comets seen at the border of the gel, the so-called 'edge effects', has been addressed. A reliable, high throughput comet assay has applications in genotoxicity testing (particularly for in vivo studies with samples from different organs) as well as ecogenotoxicology and human biomonitoring, where the numbers of samples collected can be considerable.
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Affiliation(s)
- Amaya Azqueta
- Department of Nutrition, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, 0316 Oslo, Norway.
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32
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Quist AP, Oscarsson S. Micropatterned surfaces: techniques and applications in cell biology. Expert Opin Drug Discov 2012; 5:569-81. [PMID: 22823168 DOI: 10.1517/17460441.2010.489606] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
IMPORTANCE OF THE FIELD Engineering of cell culture substrates provides a unique opportunity for precise control of the cellular microenvironment with both spatial as well as temporal resolutions. This greatly enhances studies of cell-cell, cell-matrix and cell-factor interaction studies in vitro. AREAS COVERED IN THIS REVIEW The technologies used for micropatterning in the biological field over the last decade and new applications in the last few years for dynamic control of surfaces, tissue engineering, drug discovery, cell-cell interactions and stem cell studies are presented. WHAT THE READER WILL GAIN The reader will gain knowledge on the state of the art in micropatterning and its wide ranging applications in cell patterning, with new pathways to control the cell environment. TAKE HOME MESSAGE Micropatterning of cells has been studied and developed enough to be widely applied ranging from single cell assays to tissue engineering. Techniques have evolved from many-step processes to direct writing of biologically selective patterns.
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Affiliation(s)
- Arjan P Quist
- Richmond Chemical Corp., 2210 Midwest Rd Ste 100, Oak Brook IL 60523, USA +1 630 5722500 ; +1 630 5722522 ;
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33
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Bauer M, Kim K, Qiu Y, Calpe B, Khademhosseini A, Liao R, Wheeldon I. Spot identification and quality control in cell-based microarrays. ACS COMBINATORIAL SCIENCE 2012; 14:471-7. [PMID: 22850537 DOI: 10.1021/co300039w] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cell-based microarrays are being increasingly used as a tool for combinatorial and high throughput screening of cellular microenvironments. Analysis of microarrays requires several steps, including microarray imaging, identification of cell spots, quality control, and data exploration. While high content image analysis, cell counting, and cell pattern recognition methods are established, there is a need for new postprocessing and quality control methods for cell-based microarrays used to investigate combinatorial microenvironments. Previously, microarrayed cell spot identification and quality control were performed manually, leading to excessive processing time and potentially resulting in human bias. This work introduces an automated approach to identify cell-based microarray spots and spot quality control. The approach was used to analyze the adhesion of murine cardiac side population cells on combinatorial arrays of extracellular matrix proteins. Microarrays were imaged by automated fluorescence microscopy and cells were identified using open-source image analysis software (CellProfiler). From these images, clusters of cells making up single cell spots were reliably identified by analyzing the distances between cells using a density-based clustering algorithm (OPTICS). Naïve Bayesian classifiers trained on manually scored training sets identified good and poor quality spots using spot size, number of cells per spot, and cell location as quality control criteria. Combined, the approach identified 78% of high quality spots and 87% of poor quality spots. Full factorial analysis of the resulting microarray data revealed that collagen IV exhibited the highest positive effect on cell attachment. This data processing approach allows for fast and unbiased analysis of cell-based microarray data.
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Affiliation(s)
- Michael Bauer
- Cardiovascular Division, Department
of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United
States
| | - Keekyoung Kim
- Center for Biomedical
Engineering,
Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115,
United States
- Wyss Institute
for Biologically
Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
| | - Yiling Qiu
- Cardiovascular Division, Department
of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United
States
| | - Blaise Calpe
- Center for Biomedical
Engineering,
Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115,
United States
- Wyss Institute
for Biologically
Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
- Laboratory of Stem Cell Bioengineering
(LSCB) and Institute of Bioengineering (IBI), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Ali Khademhosseini
- Center for Biomedical
Engineering,
Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115,
United States
- Wyss Institute
for Biologically
Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
- Harvard-MIT Division of Health
Sciences and Technology, Massachusetts Institute of Technology, Cambridge Massachusetts 02139, United States
| | - Ronglih Liao
- Cardiovascular Division, Department
of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United
States
| | - Ian Wheeldon
- Center for Biomedical
Engineering,
Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115,
United States
- Wyss Institute
for Biologically
Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
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34
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Bhattacharya M, Malinen MM, Lauren P, Lou YR, Kuisma SW, Kanninen L, Lille M, Corlu A, GuGuen-Guillouzo C, Ikkala O, Laukkanen A, Urtti A, Yliperttula M. Nanofibrillar cellulose hydrogel promotes three-dimensional liver cell culture. J Control Release 2012; 164:291-8. [PMID: 22776290 DOI: 10.1016/j.jconrel.2012.06.039] [Citation(s) in RCA: 235] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 06/18/2012] [Accepted: 06/30/2012] [Indexed: 12/13/2022]
Abstract
Over the recent years, various materials have been introduced as potential 3D cell culture scaffolds. These include protein extracts, peptide amphiphiles, and synthetic polymers. Hydrogel scaffolds without human or animal borne components or added bioactive components are preferred from the immunological point of view. Here we demonstrate that native nanofibrillar cellulose (NFC) hydrogels derived from the abundant plant sources provide the desired functionalities. We show 1) rheological properties that allow formation of a 3D scaffold in-situ after facile injection, 2) cellular biocompatibility without added growth factors, 3) cellular polarization, and 4) differentiation of human hepatic cell lines HepaRG and HepG2. At high shear stress, the aqueous NFC has small viscosity that supports injectability, whereas at low shear stress conditions the material is converted to an elastic gel. Due to the inherent biocompatibility without any additives, we conclude that NFC generates a feasible and sustained microenvironment for 3D cell culture for potential applications, such as drug and chemical testing, tissue engineering, and cell therapy.
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Affiliation(s)
- Madhushree Bhattacharya
- Division of Biopharmaceutics and Pharmacokinetics, Faculty of Pharmacy, P.O. Box 56, FI-00014 University of Helsinki, Finland
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35
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Patterning surface by site selective capture of biopolymer hydrogel beads. Colloids Surf B Biointerfaces 2012; 94:369-73. [DOI: 10.1016/j.colsurfb.2012.01.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 12/22/2011] [Accepted: 01/18/2012] [Indexed: 11/19/2022]
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36
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Hvastkovs EG, Schenkman JB, Rusling JF. Metabolic toxicity screening using electrochemiluminescence arrays coupled with enzyme-DNA biocolloid reactors and liquid chromatography-mass spectrometry. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2012; 5:79-105. [PMID: 22482786 PMCID: PMC3399491 DOI: 10.1146/annurev.anchem.111808.073659] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
New chemicals or drugs must be guaranteed safe before they can be marketed. Despite widespread use of bioassay panels for toxicity prediction, products that are toxic to a subset of the population often are not identified until clinical trials. This article reviews new array methodologies based on enzyme/DNA films that form and identify DNA-reactive metabolites that are indicators of potentially genotoxic species. This molecularly based methodology is designed in a rapid screening array that utilizes electrochemiluminescence (ECL) to detect metabolite-DNA reactions, as well as biocolloid reactors that provide the DNA adducts and metabolites for liquid chromatography-mass spectrometry (LC-MS) analysis. ECL arrays provide rapid toxicity screening, and the biocolloid reactor LC-MS approach provides a valuable follow-up on structure, identification, and formation rates of DNA adducts for toxicity hits from the ECL array screening. Specific examples using this strategy are discussed. Integration of high-throughput versions of these toxicity-screening methods with existing drug toxicity bioassays should allow for better human toxicity prediction as well as more informed decision making regarding new chemical and drug candidates.
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Affiliation(s)
- Eli G. Hvastkovs
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858;
| | - John B. Schenkman
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut 06269;
| | - James F. Rusling
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut 06269;
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269;
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37
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Xu F, Wu CAM, Rengarajan V, Finley TD, Keles HO, Sung Y, Li B, Gurkan UA, Demirci U. Three-dimensional magnetic assembly of microscale hydrogels. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:4254-60. [PMID: 21830240 PMCID: PMC3534971 DOI: 10.1002/adma.201101962] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Revised: 06/13/2011] [Indexed: 05/20/2023]
Abstract
Directed assembly of nano and microscale particles is of great interest and has widespread applications in various fields including electronics, nanomaterials and tissue engineering. Bottom-up tissue engineering is motivated by the occurrence of repeating functional units in vivo. The bottom-up approach requires novel techniques to assemble engineered functional units as building blocks at a high speed with spatial control over three-dimensional (3D) micro-architecture. Here, we report a magnetic assembler that utilizes nanoparticles and microscale hydrogels as building blocks to create 3D complex multi-layer constructs via external magnetic fields using different concentrations of magnetic nanoparticles. This approach holds potential for 3D assembly processes that could be utilized in various tissue engineering and regenerative medicine applications.
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Affiliation(s)
- Feng Xu
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Chung-an Max Wu
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Venkatakrishnan Rengarajan
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Thomas Dylan Finley
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Hasan Onur Keles
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Yuree Sung
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Baoqiang Li
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Umut Atakan Gurkan
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Utkan Demirci
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
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38
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Wüst S, Müller R, Hofmann S. Controlled Positioning of Cells in Biomaterials-Approaches Towards 3D Tissue Printing. J Funct Biomater 2011; 2:119-54. [PMID: 24956301 PMCID: PMC4030943 DOI: 10.3390/jfb2030119] [Citation(s) in RCA: 165] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Revised: 06/29/2011] [Accepted: 07/12/2011] [Indexed: 02/06/2023] Open
Abstract
Current tissue engineering techniques have various drawbacks: they often incorporate uncontrolled and imprecise scaffold geometries, whereas the current conventional cell seeding techniques result mostly in random cell placement rather than uniform cell distribution. For the successful reconstruction of deficient tissue, new material engineering approaches have to be considered to overcome current limitations. An emerging method to produce complex biological products including cells or extracellular matrices in a controlled manner is a process called bioprinting or biofabrication, which effectively uses principles of rapid prototyping combined with cell-loaded biomaterials, typically hydrogels. 3D tissue printing is an approach to manufacture functional tissue layer-by-layer that could be transplanted in vivo after production. This method is especially advantageous for stem cells since a controlled environment can be created to influence cell growth and differentiation. Using printed tissue for biotechnological and pharmacological needs like in vitro drug-testing may lead to a revolution in the pharmaceutical industry since animal models could be partially replaced by biofabricated tissues mimicking human physiology and pathology. This would not only be a major advancement concerning rising ethical issues but would also have a measureable impact on economical aspects in this industry of today, where animal studies are very labor-intensive and therefore costly. In this review, current controlled material and cell positioning techniques are introduced highlighting approaches towards 3D tissue printing.
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Affiliation(s)
- Silke Wüst
- Institute for Biomechanics, ETH Zurich, 8093 Zurich, Switzerland.
| | - Ralph Müller
- Institute for Biomechanics, ETH Zurich, 8093 Zurich, Switzerland.
| | - Sandra Hofmann
- Institute for Biomechanics, ETH Zurich, 8093 Zurich, Switzerland.
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39
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Shekaran A, Garcia AJ. Nanoscale engineering of extracellular matrix-mimetic bioadhesive surfaces and implants for tissue engineering. BIOCHIMICA ET BIOPHYSICA ACTA 2011; 1810:350-60. [PMID: 20435097 PMCID: PMC2924948 DOI: 10.1016/j.bbagen.2010.04.006] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2010] [Revised: 03/31/2010] [Accepted: 04/16/2010] [Indexed: 01/02/2023]
Abstract
BACKGROUND The goal of tissue engineering is to restore tissue function using biomimetic scaffolds which direct desired cell fates such as attachment, proliferation and differentiation. Cell behavior in vivo is determined by a complex interaction of cells with extracellular biosignals, many of which exist on a nanoscale. Therefore, recent efforts in tissue engineering biomaterial development have focused on incorporating extracellular matrix- (ECM) derived peptides or proteins into biomaterials in order to mimic natural ECM. Concurrent advances in nanotechnology have also made it possible to manipulate protein and peptide presentation on surfaces on a nanoscale level. SCOPE OF REVIEW This review discusses protein and peptide nanopatterning techniques and examples of how nanoscale engineering of bioadhesive materials may enhance outcomes for regenerative medicine. MAJOR CONCLUSIONS Synergy between ECM-mimetic tissue engineering and nanotechnology fields can be found in three major strategies: (1) Mimicking nanoscale orientation of ECM peptide domains to maintain native bioactivity, (2) Presenting adhesive peptides at unnaturally high densities, and (3) Engineering multivalent ECM-derived peptide constructs. GENERAL SIGNIFICANCE Combining bioadhesion and nanopatterning technologies to allow nanoscale control of adhesive motifs on the cell-material interface may result in exciting advances in tissue engineering. This article is part of a Special Issue entitled Nanotechnologies - Emerging Applications in Biomedicine.
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Affiliation(s)
- Asha Shekaran
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
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40
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Yan C, Sun J, Ding J. Critical areas of cell adhesion on micropatterned surfaces. Biomaterials 2011; 32:3931-8. [PMID: 21356556 DOI: 10.1016/j.biomaterials.2011.01.078] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Accepted: 01/19/2011] [Indexed: 12/20/2022]
Abstract
The adhesive area is important to modulate cell behaviors on a substrate. This paper aims to semi-quantitatively examine the existence of the characteristic areas of cell adhesion on the level of individual cells. We prepared a series of micropatterned surfaces with adhesive microislands of various sizes on an adhesion-resistant background, and cultured cells of MC3T3-E1 (osteoblast), BMSC (bone mesenchymal stem cell) or NIH3T3 (fibroblast) on those modeled surfaces. We have defined seven characteristic areas of an adhesive microisland and confirmed that they are meaningful to describe cell adhesion behaviors. Those parameters are (1) the critical adhesion area from apoptosis to survival denoted as A∗ or A(c₁), (2) the critical area from adhesion of a single cell to adhesion of multiple cells (A(c₂)), (3) the basic area for one more cell to adhere (A(Δ)), (4) and (5) the characteristic areas of a microisland most probably occupied by one cell (A(peak₁) and two cells (A(peak₂)), (6) and (7) the characteristic areas of a microisland occupied by one cell (A(N₁)) or two cells (A(N₂)) on average. Besides the introduction of those basic parameters, the present paper demonstrates how to determine them experimentally. We further discussed the relationship between those characteristic areas and the spreading area on a non-patterned adhesive surface.
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Affiliation(s)
- Ce Yan
- Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
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41
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Leclair AM, Ferguson SS, Lagugné-Labarthet F. Surface patterning using plasma-deposited fluorocarbon thin films for single-cell positioning and neural circuit arrangement. Biomaterials 2011; 32:1351-60. [DOI: 10.1016/j.biomaterials.2010.10.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Accepted: 10/22/2010] [Indexed: 12/28/2022]
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