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Parameshwar PK, Vaillancourt C, Moraes C. Engineering placental trophoblast fusion: A potential role for biomechanics in syncytialization. Placenta 2024:S0143-4004(24)00054-7. [PMID: 38448351 DOI: 10.1016/j.placenta.2024.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 02/07/2024] [Accepted: 02/21/2024] [Indexed: 03/08/2024]
Abstract
The process by which placental trophoblasts fuse to form the syncytiotrophoblast around the chorionic villi is not fully understood. Mechanical features of the in vivo and in vitro culture environments have recently emerged as having the potential to influence fusion efficiency, and considering these mechanical cues may ultimately allow predictive control of trophoblast syncytialization. Here, we review recent studies that suggest that biomechanical factors such as shear stress, tissue stiffness, and dimensionally-related stresses affect villous trophoblast fusion efficiency. We then discuss how these stimuli might arise in vivo and how they can be incorporated in cultures to study and enhance villous trophoblast fusion. We believe that this mechanical paradigm will provide novel insight into manipulating the syncytialization process to better engineer improved models, understand disease progression, and ultimately develop novel therapeutic strategies.
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Affiliation(s)
| | - Cathy Vaillancourt
- Institut National de la Recherche Scientifique (INRS)-Centre Armand-Frappier Santé Biotechnologie, Laval, QC, H7B 1B7, Canada; Department of Obstetrics and Gynecology, Université de Montréal, and Research Center Centre Intégré Universitaire de Santé et de Services Sociaux (CIUSSS) du Nord-de-l'Île-de-Montréal, Montréal, QC, H3L 1K5, Canada
| | - Christopher Moraes
- Department of Biological and Biomedical Engineering, McGill University, Montréal, QC, H3A 2B4, Canada; Department of Chemical Engineering, McGill University, Montréal, QC, H3A 0C5, Canada; Goodman Cancer Research Centre, McGill University, Montréal, QC, H3A 1A3, Canada; Division of Experimental Medicine, McGill University, Montréal, QC, H4A 3J1, Canada.
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2
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Josephson TO, Morgan EF. Harnessing mechanical cues in the cellular microenvironment for bone regeneration. Front Physiol 2023; 14:1232698. [PMID: 37877097 PMCID: PMC10591087 DOI: 10.3389/fphys.2023.1232698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 09/25/2023] [Indexed: 10/26/2023] Open
Abstract
At the macroscale, bones experience a variety of compressive and tensile loads, and these loads cause deformations of the cortical and trabecular microstructure. These deformations produce a variety of stimuli in the cellular microenvironment that can influence the differentiation of marrow stromal cells (MSCs) and the activity of cells of the MSC lineage, including osteoblasts, osteocytes, and chondrocytes. Mechanotransduction, or conversion of mechanical stimuli to biochemical and biological signals, is thus part of a multiscale mechanobiological process that drives bone modeling, remodeling, fracture healing, and implant osseointegration. Despite strong evidence of the influence of a variety of mechanical cues, and multiple paradigms proposed to explain the influence of these cues on tissue growth and differentiation, even a working understanding of how skeletal cells respond to the complex combinations of stimuli in their microenvironments remains elusive. This review covers the current understanding of what types of microenvironmental mechanical cues MSCs respond to and what is known about how they respond in the presence of multiple such cues. We argue that in order to realize the vast potential for harnessing the cellular microenvironment for the enhancement of bone regeneration, additional investigations of how combinations of mechanical cues influence bone regeneration are needed.
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Affiliation(s)
- Timothy O. Josephson
- Biomedical Engineering, Boston University, Boston, MA, United States
- Center for Multiscale and Translational Mechanobiology, Boston University, Boston, MA, United States
| | - Elise F. Morgan
- Biomedical Engineering, Boston University, Boston, MA, United States
- Center for Multiscale and Translational Mechanobiology, Boston University, Boston, MA, United States
- Mechanical Engineering, Boston University, Boston, MA, United States
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3
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Kim OH, Jeon TJ, Shin YK, Lee HJ. Role of extrinsic physical cues in cancer progression. BMB Rep 2023; 56:287-295. [PMID: 37037673 PMCID: PMC10230013 DOI: 10.5483/bmbrep.2023-0031] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 03/27/2023] [Accepted: 04/06/2023] [Indexed: 07/22/2023] Open
Abstract
The tumor microenvironment (TME) is a complex system composed of many cell types and an extracellular matrix (ECM). During tumorigenesis, cancer cells constantly interact with cellular components, biochemical cues, and the ECM in the TME, all of which make the environment favorable for cancer growth. Emerging evidence has revealed the importance of substrate elasticity and biomechanical forces in tumor progression and metastasis. However, the mechanisms underlying the cell response to mechanical signals-such as extrinsic mechanical forces and forces generated within the TME-are still relatively unknown. Moreover, having a deeper understanding of the mechanisms by which cancer cells sense mechanical forces and transmit signals to the cytoplasm would substantially help develop effective strategies for cancer treatment. This review provides an overview of biomechanical forces in the TME and the intracellular signaling pathways activated by mechanical cues as well as highlights the role of mechanotransductive pathways through mechanosensors that detect the altering biomechanical forces in the TME. as an adjuvant for cancer immunotherapy.[BMB Reports 2023; 56(5): 287-295].
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Affiliation(s)
- Ok-Hyeon Kim
- Department of Anatomy and Cell Biology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Tae Jin Jeon
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul 06974, Korea
| | - Yong Kyoo Shin
- Department of Pharmacology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Hyun Jung Lee
- Department of Anatomy and Cell Biology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul 06974, Korea
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4
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Shou Y, Teo XY, Wu KZ, Bai B, Kumar ARK, Low J, Le Z, Tay A. Dynamic Stimulations with Bioengineered Extracellular Matrix-Mimicking Hydrogels for Mechano Cell Reprogramming and Therapy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023:e2300670. [PMID: 37119518 PMCID: PMC10375194 DOI: 10.1002/advs.202300670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 04/10/2023] [Indexed: 06/19/2023]
Abstract
Cells interact with their surrounding environment through a combination of static and dynamic mechanical signals that vary over stimulus types, intensity, space, and time. Compared to static mechanical signals such as stiffness, porosity, and topography, the current understanding on the effects of dynamic mechanical stimulations on cells remains limited, attributing to a lack of access to devices, the complexity of experimental set-up, and data interpretation. Yet, in the pursuit of emerging translational applications (e.g., cell manufacturing for clinical treatment), it is crucial to understand how cells respond to a variety of dynamic forces that are omnipresent in vivo so that they can be exploited to enhance manufacturing and therapeutic outcomes. With a rising appreciation of the extracellular matrix (ECM) as a key regulator of biofunctions, researchers have bioengineered a suite of ECM-mimicking hydrogels, which can be fine-tuned with spatiotemporal mechanical cues to model complex static and dynamic mechanical profiles. This review first discusses how mechanical stimuli may impact different cellular components and the various mechanobiology pathways involved. Then, how hydrogels can be designed to incorporate static and dynamic mechanical parameters to influence cell behaviors are described. The Scopus database is also used to analyze the relative strength in evidence, ranging from strong to weak, based on number of published literatures, associated citations, and treatment significance. Additionally, the impacts of static and dynamic mechanical stimulations on clinically relevant cell types including mesenchymal stem cells, fibroblasts, and immune cells, are evaluated. The aim is to draw attention to the paucity of studies on the effects of dynamic mechanical stimuli on cells, as well as to highlight the potential of using a cocktail of various types and intensities of mechanical stimulations to influence cell fates (similar to the concept of biochemical cocktail to direct cell fate). It is envisioned that this progress report will inspire more exciting translational development of mechanoresponsive hydrogels for biomedical applications.
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Affiliation(s)
- Yufeng Shou
- Department of Biomedical Engineering, National University of Singapore, Singapore, 117583, Singapore
- Institute for Health Innovation and Technology, National University of Singapore, Singapore, 117599, Singapore
| | - Xin Yong Teo
- Department of Biomedical Engineering, National University of Singapore, Singapore, 117583, Singapore
| | - Kenny Zhuoran Wu
- Department of Biomedical Engineering, National University of Singapore, Singapore, 117583, Singapore
| | - Bingyu Bai
- Department of Biomedical Engineering, National University of Singapore, Singapore, 117583, Singapore
| | - Arun R K Kumar
- Department of Biomedical Engineering, National University of Singapore, Singapore, 117583, Singapore
- Institute for Health Innovation and Technology, National University of Singapore, Singapore, 117599, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
| | - Jessalyn Low
- Department of Biomedical Engineering, National University of Singapore, Singapore, 117583, Singapore
| | - Zhicheng Le
- Department of Biomedical Engineering, National University of Singapore, Singapore, 117583, Singapore
- Institute for Health Innovation and Technology, National University of Singapore, Singapore, 117599, Singapore
| | - Andy Tay
- Department of Biomedical Engineering, National University of Singapore, Singapore, 117583, Singapore
- Institute for Health Innovation and Technology, National University of Singapore, Singapore, 117599, Singapore
- NUS Tissue Engineering Program, National University of Singapore, Singapore, 117510, Singapore
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5
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Shou Y, Liu L, Liu Q, Le Z, Lee KL, Li H, Li X, Koh DZ, Wang Y, Liu TM, Yang Z, Lim CT, Cheung C, Tay A. Mechano-responsive hydrogel for direct stem cell manufacturing to therapy. Bioact Mater 2023; 24:387-400. [PMID: 36632503 PMCID: PMC9817177 DOI: 10.1016/j.bioactmat.2022.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 12/05/2022] [Accepted: 12/20/2022] [Indexed: 01/04/2023] Open
Abstract
Bone marrow-derived mesenchymal stem cell (MSC) is one of the most actively studied cell types due to its regenerative potential and immunomodulatory properties. Conventional cell expansion methods using 2D tissue culture plates and 2.5D microcarriers in bioreactors can generate large cell numbers, but they compromise stem cell potency and lack mechanical preconditioning to prepare MSC for physiological loading expected in vivo. To overcome these challenges, in this work, we describe a 3D dynamic hydrogel using magneto-stimulation for direct MSC manufacturing to therapy. With our technology, we found that dynamic mechanical stimulation (DMS) enhanced matrix-integrin β1 interactions which induced MSCs spreading and proliferation. In addition, DMS could modulate MSC biofunctions including directing MSC differentiation into specific lineages and boosting paracrine activities (e.g., growth factor secretion) through YAP nuclear localization and FAK-ERK pathway. With our magnetic hydrogel, complex procedures from MSC manufacturing to final clinical use, can be integrated into one single platform, and we believe this 'all-in-one' technology could offer a paradigm shift to existing standards in MSC therapy.
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Affiliation(s)
- Yufeng Shou
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
| | - Ling Liu
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
- NUS Tissue Engineering Program, National University of Singapore, 117510, Singapore
| | - Qimin Liu
- School of Civil Engineering and Architecture, Wuhan University of Technology, 430070, Wuhan, China
| | - Zhicheng Le
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
| | - Khang Leng Lee
- Lee Kong Chian School of Medicine, Nanyang Technological University, 636921, Singapore
| | - Hua Li
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore
| | - Xianlei Li
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
| | - Dion Zhanyun Koh
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
| | - Yuwen Wang
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
| | - Tong Ming Liu
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 138648, Singapore
| | - Zheng Yang
- NUS Tissue Engineering Program, National University of Singapore, 117510, Singapore
- Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, 119288, Singapore
| | - Chwee Teck Lim
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
- Mechanobiology Institute, National University of Singapore, 117411, Singapore
| | - Christine Cheung
- Lee Kong Chian School of Medicine, Nanyang Technological University, 636921, Singapore
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 138648, Singapore
| | - Andy Tay
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
- NUS Tissue Engineering Program, National University of Singapore, 117510, Singapore
- Corresponding author. Department of Biomedical Engineering, National University of Singapore, 117583, Singapore.
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Yang J, Liu C, Sun H, Liu Y, Liu Z, Zhang D, Zhao G, Wang Q, Yang D. The progress in titanium alloys used as biomedical implants: From the view of reactive oxygen species. Front Bioeng Biotechnol 2022; 10:1092916. [PMID: 36601391 PMCID: PMC9806234 DOI: 10.3389/fbioe.2022.1092916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
Titanium and Titanium alloys are widely used as biomedical implants in oral and maxillofacial surgery, due to superior mechanical properties and biocompatibility. In specific clinical populations such as the elderly, diabetics and patients with metabolic diseases, the failure rate of medical metal implants is increased significantly, putting them at increased risk of revision surgery. Many studies show that the content of reactive oxygen species (ROS) in the microenvironment of bone tissue surrounding implant materials is increased in patients undergoing revision surgery. In addition, the size and shape of materials, the morphology, wettability, mechanical properties, and other properties play significant roles in the production of ROS. The accumulated ROS break the original balance of oxidation and anti-oxidation, resulting in host oxidative stress. It may accelerate implant degradation mainly by activating inflammatory cells. Peri-implantitis usually leads to a loss of bone mass around the implant, which tends to affect the long-term stability and longevity of implant. Therefore, a great deal of research is urgently needed to focus on developing antibacterial technologies. The addition of active elements to biomedical titanium and titanium alloys greatly reduce the risk of postoperative infection in patients. Besides, innovative technologies are developing new biomaterials surfaces conferring anti-infective properties that rely on the production of ROS. It can be considered that ROS may act as a messenger substance for the communication between the host and the implanted material, which run through the entire wound repair process and play a role that cannot be ignored. It is necessary to understand the interaction between oxidative stress and materials, the effects of oxidative stress products on osseointegration and implant life as well as ROS-induced bactericidal activity. This helps to facilitate the development of a new generation of well-biocompatible implant materials with ROS responsiveness, and ultimately prolong the lifespan of implants.
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Affiliation(s)
- Jun Yang
- School of Stomatology, Jiamusi University, Jiamusi, China,Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Chang Liu
- School of Stomatology, Jiamusi University, Jiamusi, China,Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Hui Sun
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Ying Liu
- The Affiliated Taian City Central Hospital of Qingdao University, Taian, China
| | - Zhaogang Liu
- The Affiliated Taian City Central Hospital of Qingdao University, Taian, China
| | - Dan Zhang
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China,*Correspondence: Donghong Yang, ; Dan Zhang,
| | - Gang Zhao
- School of Stomatology, Jiamusi University, Jiamusi, China
| | - Qiang Wang
- Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Donghong Yang
- School of Stomatology, Jiamusi University, Jiamusi, China,*Correspondence: Donghong Yang, ; Dan Zhang,
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7
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Morales IA, Boghdady CM, Campbell BE, Moraes C. Integrating mechanical sensor readouts into organ-on-a-chip platforms. Front Bioeng Biotechnol 2022; 10:1060895. [PMID: 36588933 PMCID: PMC9800895 DOI: 10.3389/fbioe.2022.1060895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022] Open
Abstract
Organs-on-a-chip have emerged as next-generation tissue engineered models to accurately capture realistic human tissue behaviour, thereby addressing many of the challenges associated with using animal models in research. Mechanical features of the culture environment have emerged as being critically important in designing organs-on-a-chip, as they play important roles in both stimulating realistic tissue formation and function, as well as capturing integrative elements of homeostasis, tissue function, and tissue degeneration in response to external insult and injury. Despite the demonstrated impact of incorporating mechanical cues in these models, strategies to measure these mechanical tissue features in microfluidically-compatible formats directly on-chip are relatively limited. In this review, we first describe general microfluidically-compatible Organs-on-a-chip sensing strategies, and categorize these advances based on the specific advantages of incorporating them on-chip. We then consider foundational and recent advances in mechanical analysis techniques spanning cellular to tissue length scales; and discuss their integration into Organs-on-a-chips for more effective drug screening, disease modeling, and characterization of biological dynamics.
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Affiliation(s)
| | | | | | - Christopher Moraes
- Division of Experimental Medicine, McGill University, Montreal, QC, Canada,Department of Chemical Engineering, McGill University, Montreal, QC, Canada,Department of Biomedical Engineering, McGill University, Montreal, QC, Canada,*Correspondence: Christopher Moraes,
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8
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Zhou Y, Hao Y, Sun P, Chen M, Zhang T, Wu H. Relationship among surface electric double layer of cardiomyocyte membrane and toxicology of digoxin and opening of ion channels. Sci Rep 2022; 12:20749. [PMID: 36456624 PMCID: PMC9715572 DOI: 10.1038/s41598-022-25205-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 11/28/2022] [Indexed: 12/03/2022] Open
Abstract
We applied a new idea that the potential effect can change the ion adsorption structure on the cell surface to explore the mechanism of digoxin poisoning and the regulation of ion channels. The effects of digoxin on the electrophoretic mobility and behaviors (non-contraction or contraction or autorhythmicity) of cardiomyocytes were observed by single-cell electrophoresis technique (imitate the opening method of in vivo channel) and the method of decomposing surface potential components on the cells. As well as affect the association with electrical activity. The results suggested that the increase of cardiomyocytes transmembrane potential and the Na+-K+ exchange on the cell surface of the action potential phase 4 caused by the poisoning dose of digoxin, leading to the oscillation of adsorbed ions on the cell surface and the incomplete channel structure, which were the mechanism of cardiac ectopic beats. The results revealed that the opening of ion channels is regulated by the surface electric double layer of the cell membrane.
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Affiliation(s)
- Ying Zhou
- grid.414252.40000 0004 1761 8894The Sixth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, 100142 China
| | - Yanfei Hao
- grid.414252.40000 0004 1761 8894The Eighth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, 100091 China
| | - Pei Sun
- grid.414252.40000 0004 1761 8894The Eighth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, 100091 China
| | - Ming Chen
- grid.414252.40000 0004 1761 8894The Medical Security Center, Chinese People’s Liberation Army General Hospital, Beijing, 100039 China
| | - Ting Zhang
- grid.414252.40000 0004 1761 8894The Eighth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, 100091 China
| | - Hong Wu
- grid.414252.40000 0004 1761 8894The Medical Security Center, Chinese People’s Liberation Army General Hospital, Beijing, 100039 China
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9
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Kim OH, Choi YW, Hong SA, Hong M, Chang IH, Lee HJ. Fluid shear stress facilitates prostate cancer metastasis through Piezo1-Src-YAP axis. Life Sci 2022; 308:120936. [PMID: 36084759 DOI: 10.1016/j.lfs.2022.120936] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 08/23/2022] [Accepted: 09/03/2022] [Indexed: 10/31/2022]
Abstract
AIMS Mechanical forces surrounding solid tumors are pervasive in the tumor microenvironment (TME) and abnormally altered as solid tumors progress. Although it has been reported that biomechanical forces, including wall shear stress (WSS), enhance the metastatic features of cancer cells, its mechanism remains unknown. Here, we investigate how cancer cells sense mechanical stress and propagate signals in the TME. MAIN METHODS Using a microfluidic device, interstitial fluid-mimicking flow (0.05 dyne cm-2) was applied to the human prostate cancer cell line PC3. Piezo1 siRNA and shRNA lentivirus were applied to PC3 cells to ablate Piezo1 expression. PC3-Luc2 cells expressing control shRNA or shPiezo1 lentivirus were administered into the prostate of BALB/c mice for orthotopic injection. KEY FINDING Here, we show that Piezo1, a mechanosensitive ion channel, is activated by WSS in microfluidic channels. Moreover, Yoda1, a Piezo1 agonist, synergistically potentiates cancer cell motility and nuclear retention of YAP/TAZ via WSS. Also, Piezo1 increases Src phosphorylation, which activates YAP. Conversely, silencing Piezo1 significantly reduces cell motility and YAP/TAZ activity induced by WSS, and finally retards tumor growth and metastasis of administered PC3 cells in BALB/c mice. SIGNIFICANCE Taken together, these results demonstrate that Piezo1 allows cancer cells to sense mechanical stimuli by altering the microenvironment during tumor progression and is a critical player in modulating cancer metastasis through the Piezo1-Src-YAP axis.
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Affiliation(s)
- Ok-Hyeon Kim
- Department of Anatomy and Cell Biology, College of Medicine, Chung-Ang University, Seoul 06974, South Korea; Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul 06974, South Korea
| | - Young Wook Choi
- Department of Urology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06974, South Korea
| | - Soon Auck Hong
- Department of Pathology, College of Medicine, Chung-Ang University, Seoul 06974, South Korea
| | - Mineui Hong
- Department of Pathology, College of Medicine, Chung-Ang University, Seoul 06974, South Korea
| | - In Ho Chang
- Department of Urology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06974, South Korea.
| | - Hyun Jung Lee
- Department of Anatomy and Cell Biology, College of Medicine, Chung-Ang University, Seoul 06974, South Korea; Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul 06974, South Korea.
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10
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Kalashnikov N, Moraes C. Engineering physical microenvironments to study innate immune cell biophysics. APL Bioeng 2022; 6:031504. [PMID: 36156981 PMCID: PMC9492295 DOI: 10.1063/5.0098578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 08/22/2022] [Indexed: 12/04/2022] Open
Abstract
Innate immunity forms the core of the human body's defense system against infection, injury, and foreign objects. It aims to maintain homeostasis by promoting inflammation and then initiating tissue repair, but it can also lead to disease when dysregulated. Although innate immune cells respond to their physical microenvironment and carry out intrinsically mechanical actions such as migration and phagocytosis, we still do not have a complete biophysical description of innate immunity. Here, we review how engineering tools can be used to study innate immune cell biophysics. We first provide an overview of innate immunity from a biophysical perspective, review the biophysical factors that affect the innate immune system, and then explore innate immune cell biophysics in the context of migration, phagocytosis, and phenotype polarization. Throughout the review, we highlight how physical microenvironments can be designed to probe the innate immune system, discuss how biophysical insight gained from these studies can be used to generate a more comprehensive description of innate immunity, and briefly comment on how this insight could be used to develop mechanical immune biomarkers and immunomodulatory therapies.
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Affiliation(s)
- Nikita Kalashnikov
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0G4, Canada
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11
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Parameshwar PK, Sagrillo-Fagundes L, Azevedo Portilho N, Pastor WA, Vaillancourt C, Moraes C. Engineered models for placental toxicology: Emerging approaches based on tissue decellularization. Reprod Toxicol 2022; 112:148-159. [PMID: 35840119 DOI: 10.1016/j.reprotox.2022.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 06/30/2022] [Accepted: 07/11/2022] [Indexed: 11/28/2022]
Abstract
Recent increases in prescriptions and illegal drug use as well as exposure to environmental contaminants during pregnancy have highlighted the critical importance of placental toxicology in understanding and identifying risks to both mother and fetus. Although advantageous for basic science, current in vitro models often fail to capture the complexity of placental response, likely due to their inability to recreate and monitor aspects of the microenvironment including physical properties, mechanical forces and stiffness, protein composition, cell-cell interactions, soluble and physicochemical factors, and other exogenous cues. Tissue engineering holds great promise in addressing these challenges and provides an avenue to better understand basic biology, effects of toxic compounds and potential therapeutics. The key to success lies in effectively recreating the microenvironment. One strategy to do this would be to recreate individual components and then combine them. However, this becomes challenging due to variables present according to conditions such as tissue location, age, health status and lifestyle. The extracellular matrix (ECM) is known to influence cellular fate by working as a storage of factors. Decellularized ECM (dECM) is a recent tool that allows usage of the original ECM in a refurbished form, providing a relatively reliable representation of the microenvironment. This review focuses on using dECM in modified forms such as whole organs, scaffold sheets, electrospun nanofibers, hydrogels, 3D printing, and combinations as building blocks to recreate aspects of the microenvironment to address general tissue engineering and toxicology challenges, thus illustrating their potential as tools for future placental toxicology studies.
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Affiliation(s)
| | | | - Nathalia Azevedo Portilho
- Department of Chemical Engineering, McGill University, Montréal, Québec, Canada; Department of Biochemistry, McGill University, Montréal, Québec, Canada
| | - William A Pastor
- Department of Biochemistry, McGill University, Montréal, Québec, Canada; Rosalind & Morris Goodman Cancer Institute, McGill University, Montréal, Québec, Canada
| | - Cathy Vaillancourt
- INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Québec, Canada; Department of Obstetrics and Gynecology, Université de Montréal, Montréal, Québec, Canada
| | - Christopher Moraes
- Department of Biological and Biomedical Engineering, McGill University, Montréal, Québec, Canada; Department of Chemical Engineering, McGill University, Montréal, Québec, Canada; Rosalind & Morris Goodman Cancer Institute, McGill University, Montréal, Québec, Canada; Division of Experimental Medicine, McGill University, Montréal, Québec, Canada.
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12
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Mechanical force-promoted osteoclastic differentiation via periodontal ligament stem cell exosomal protein ANXA3. Stem Cell Reports 2022; 17:1842-1858. [PMID: 35868309 PMCID: PMC9391435 DOI: 10.1016/j.stemcr.2022.06.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 12/16/2022] Open
Abstract
Exosomes play a critical role in intracellular communication. The biogenesis and function of exosomes are regulated by multiple biochemical factors. In the present study, we find that mechanical force promotes the biogenesis of exosomes derived from periodontal ligament stem cells (PDLSCs) and alters the exosomal proteome profile to induce osteoclastic differentiation. Mechanistically, mechanical force increases the level of exosomal proteins, especially annexin A3 (ANXA3), which facilitates exosome internalization to activate extracellular signal-regulated kinase (ERK), thus inducing osteoclast differentiation. Moreover, the infusion of exosomes derived from PDLSCs into mice promotes mechanical force-induced tooth movement and increases osteoclasts in the periodontal ligament. Collectively, this study demonstrates that mechanical force treatment promotes the biogenesis of exosomes from PDLSCs and increases exosomal protein ANXA3 to facilitate exosome internalization, which activates ERK phosphorylation, thus inducing osteoclast differentiation. Our findings shed light on new mechanisms for how mechanical force regulates the biology of exosomes and bone metabolism. Mechanical force promotes the biogenesis of exosomes derived from PDLSCs by RAB27B Mechanical force increases exosomal protein ANXA3 to facilitate exosome internalization ANXA3 activates ERK phosphorylation to induce osteoclast differentiation PDLSC exosomes enhance mechanical force-induced tooth movement
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13
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Perfusion in Organ-on-Chip Models and Its Applicability to the Replication of Spermatogenesis In Vitro. Int J Mol Sci 2022; 23:ijms23105402. [PMID: 35628214 PMCID: PMC9141186 DOI: 10.3390/ijms23105402] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/05/2022] [Accepted: 05/06/2022] [Indexed: 02/01/2023] Open
Abstract
Organ/organoid-on-a-chip (OoC) technologies aim to replicate aspects of the in vivo environment in vitro, at the scale of microns. Mimicking the spatial in vivo structure is important and can provide a deeper understanding of the cell–cell interactions and the mechanisms that lead to normal/abnormal function of a given organ. It is also important for disease models and drug/toxin testing. Incorporating active fluid flow in chip models enables many more possibilities. Active flow can provide physical cues, improve intercellular communication, and allow for the dynamic control of the environment, by enabling the efficient introduction of biological factors, drugs, or toxins. All of this is in addition to the fundamental role of flow in supplying nutrition and removing waste metabolites. This review presents an overview of the different types of fluid flow and how they are incorporated in various OoC models. The review then describes various methods and techniques of incorporating perfusion networks into OoC models, including self-assembly, bioprinting techniques, and utilizing sacrificial gels. The second part of the review focuses on the replication of spermatogenesis in vitro; the complex process whereby spermatogonial stem cells differentiate into mature sperm. A general overview is given of the various approaches that have been used. The few studies that incorporated microfluidics or vasculature are also described. Finally, a future perspective is given on elements from perfusion-based models that are currently used in models of other organs and can be applied to the field of in vitro spermatogenesis. For example, adopting tubular blood vessel models to mimic the morphology of the seminiferous tubules and incorporating vasculature in testis-on-a-chip models. Improving these models would improve our understanding of the process of spermatogenesis. It may also potentially provide novel therapeutic strategies for pre-pubertal cancer patients who need aggressive chemotherapy that can render them sterile, as well asfor a subset of non-obstructive azoospermic patients with maturation arrest, whose testes do not produce sperm but still contain some of the progenitor cells.
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14
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AbuMadighem A, Shuchat S, Lunenfeld E, Yossifon G, Huleihel M. Testis on a chip - a microfluidic 3-dimensional culture system for the development of spermatogenesis in-vitro. Biofabrication 2022; 14. [PMID: 35334473 DOI: 10.1088/1758-5090/ac6126] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 03/25/2022] [Indexed: 11/12/2022]
Abstract
This research presents a novel Testis-on-a Chip- platform. Testicular cells are enzymatically isolated from the seminiferous tubules of sexually immature mice, seeded in a methylcellulose gel and cultured in a microfluidic chip. The unique design sandwiches the soft methylcellulose between stiffer agar support gels. The cells develop into organoids continuing to proliferate and differentiate. After seven weeks of culture the cells have over 95% viability. Confocal microscopy of the developed organoids reveals a structure containing the various stages of spermatogenesis up to and including meiosis II: premeiotic, meiotic and post-meiotic germ cells. The organoid structure also contains the supporting Sertoli and peritubular cells. The responsiveness of the system to the addition of testosterone and retinoic acid to the culture medium during the experiment are also investigated. As a benchmark, the Testis-on-a-Chip is compared to a conventional three-dimensional methylcellulose cell culture in a well plate. Analysis via FACS (Fluorescence-activated cell sorting) shows more haploid cells in the chip as compared to the plates. Immunofluorescence staining after seven weeks of culture shows more differentiated cells in the chip as compared to the well plate. This demonstrates the feasibility of our platform as well as its advantages. This research opens new horizons for the study and realization of spermatogenesis in-vitro. It can also enable the implementation of microfluidic technologies in future therapeutic strategies for pre pubertal male fertility preservation and adults with maturation arrest. Lastly, it can serve as a platform for drug and toxin testing.
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Affiliation(s)
- Ali AbuMadighem
- Ben-Gurion University of the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Southern, 84105, ISRAEL
| | - Sholom Shuchat
- Technion Israel Institute of Technology, Faculty of Mechanical Engineering, Haifa, Haifa, 3200003, ISRAEL
| | - Eitan Lunenfeld
- Ben-Gurion University of the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Beer-Sheva, Southern, 84105, ISRAEL
| | - Gilad Yossifon
- Technion Israel Institute of Technology, Faculty of Mechanical Engineering, Haifa, Haifa, 3200003, ISRAEL
| | - Mahmoud Huleihel
- Ben-Gurion University of the Negev, Faculty of Health Sciences, Beer-Sheva, 84105, ISRAEL
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15
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Lipreri MV, Baldini N, Graziani G, Avnet S. Perfused Platforms to Mimic Bone Microenvironment at the Macro/Milli/Microscale: Pros and Cons. Front Cell Dev Biol 2022; 9:760667. [PMID: 35047495 PMCID: PMC8762164 DOI: 10.3389/fcell.2021.760667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 11/30/2021] [Indexed: 11/26/2022] Open
Abstract
As life expectancy increases, the population experiences progressive ageing. Ageing, in turn, is connected to an increase in bone-related diseases (i.e., osteoporosis and increased risk of fractures). Hence, the search for new approaches to study the occurrence of bone-related diseases and to develop new drugs for their prevention and treatment becomes more pressing. However, to date, a reliable in vitro model that can fully recapitulate the characteristics of bone tissue, either in physiological or altered conditions, is not available. Indeed, current methods for modelling normal and pathological bone are poor predictors of treatment outcomes in humans, as they fail to mimic the in vivo cellular microenvironment and tissue complexity. Bone, in fact, is a dynamic network including differently specialized cells and the extracellular matrix, constantly subjected to external and internal stimuli. To this regard, perfused vascularized models are a novel field of investigation that can offer a new technological approach to overcome the limitations of traditional cell culture methods. It allows the combination of perfusion, mechanical and biochemical stimuli, biological cues, biomaterials (mimicking the extracellular matrix of bone), and multiple cell types. This review will discuss macro, milli, and microscale perfused devices designed to model bone structure and microenvironment, focusing on the role of perfusion and encompassing different degrees of complexity. These devices are a very first, though promising, step for the development of 3D in vitro platforms for preclinical screening of novel anabolic or anti-catabolic therapeutic approaches to improve bone health.
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Affiliation(s)
| | - Nicola Baldini
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.,Biomedical Science and Technologies Lab, IRCSS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Gabriela Graziani
- Laboratory for NanoBiotechnology (NaBi), IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Sofia Avnet
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
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16
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Choi G, Tang Z, Guan W. Microfluidic high-throughput single-cell mechanotyping: Devices and
applications. NANOTECHNOLOGY AND PRECISION ENGINEERING 2021. [DOI: 10.1063/10.0006042] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Gihoon Choi
- Department of Electrical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802,
USA
| | - Zifan Tang
- Department of Electrical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802,
USA
| | - Weihua Guan
- Department of Electrical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802,
USA
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802,
USA
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17
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Grubb ML, Caliari SR. Fabrication approaches for high-throughput and biomimetic disease modeling. Acta Biomater 2021; 132:52-82. [PMID: 33716174 PMCID: PMC8433272 DOI: 10.1016/j.actbio.2021.03.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 02/15/2021] [Accepted: 03/02/2021] [Indexed: 12/24/2022]
Abstract
There is often a tradeoff between in vitro disease modeling platforms that capture pathophysiologic complexity and those that are amenable to high-throughput fabrication and analysis. However, this divide is closing through the application of a handful of fabrication approaches-parallel fabrication, automation, and flow-driven assembly-to design sophisticated cellular and biomaterial systems. The purpose of this review is to highlight methods for the fabrication of high-throughput biomaterial-based platforms and showcase examples that demonstrate their utility over a range of throughput and complexity. We conclude with a discussion of future considerations for the continued development of higher-throughput in vitro platforms that capture the appropriate level of biological complexity for the desired application. STATEMENT OF SIGNIFICANCE: There is a pressing need for new biomedical tools to study and understand disease. These platforms should mimic the complex properties of the body while also permitting investigation of many combinations of cells, extracellular cues, and/or therapeutics in high-throughput. This review summarizes emerging strategies to fabricate biomimetic disease models that bridge the gap between complex tissue-mimicking microenvironments and high-throughput screens for personalized medicine.
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Affiliation(s)
- Mackenzie L Grubb
- Department of Biomedical Engineering, University of Virginia, Unites States
| | - Steven R Caliari
- Department of Biomedical Engineering, University of Virginia, Unites States; Department of Chemical Engineering, University of Virginia, Unites States.
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18
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Zou R, Wu S, Wang Y, Kang X, Zhao S, Shi H, Zheng D, Gao B, Ma S, Niu L, Gao Y. Role of integrin‑linked kinase in static compressive stress‑induced autophagy via phosphatidylinositol 3 kinase in human periodontal ligament cells. Int J Mol Med 2021; 48:167. [PMID: 34278436 PMCID: PMC8285053 DOI: 10.3892/ijmm.2021.5000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 05/27/2021] [Indexed: 12/12/2022] Open
Abstract
Orthodontic tooth movement (OTM) is achieved by using mechanical stimuli, which lead to the remodeling of periodontal tissues. Previous findings have demonstrated that autophagy may be one of the cell responses to mechanical stress. As a key structure in the integrin pathway, integrin linked‑kinase (ILK) may play a role in the transmission of these mechanical signals. In addition, ILK is an important upstream molecule that regulates autophagy, under the influence of phosphatidylinositol 3 kinase (PI3K). Therefore, exploring the effect of mechanical stress on autophagy and the associated role of ILK/PI3K is of utmost significance to understanding the mechanism behind OTM. In the present study, human periodontal ligament cells (hPDLCs) were embedded into a collagen‑alginate complex hydrogel for three‑dimensional (3D) culturing. Static compressive stress (2.5 g/cm2) was loaded using the uniform weight method for 5, 15, 30, and 60 min. The autophagy of hPDLCs was detected by the expression of Beclin‑1 (BECN1) and ATG‑5 using RT‑qPCR and LC3, respectively, using immunofluorescence. The results showed that the level of autophagy and gene expression of ILK increased significantly under static compressive stress. In ILK‑silenced cells, static compressive stress could also upregulate ILK expression and increase the levels of autophagy. After PI3K inhibition, the increase in the autophagy level and the upregulation of ILK expression disappeared. These findings suggest that static compressive stress can induce autophagy in hPDLCs in a rapid, transient process, regulated by ILK and PI3K. Moreover, this static stress can upregulate ILK expression in a PI3K‑dependent manner.
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Affiliation(s)
- Rui Zou
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Shiyang Wu
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Yijie Wang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Xueping Kang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Shuyang Zhao
- College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Haoyu Shi
- College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Danqing Zheng
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Bei Gao
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Shuyu Ma
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Lin Niu
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Yunan Gao
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
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19
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Liu H, Usprech JF, Parameshwar PK, Sun Y, Simmons CA. Combinatorial screen of dynamic mechanical stimuli for predictive control of MSC mechano-responsiveness. SCIENCE ADVANCES 2021; 7:7/19/eabe7204. [PMID: 33962940 PMCID: PMC8104874 DOI: 10.1126/sciadv.abe7204] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 03/19/2021] [Indexed: 05/05/2023]
Abstract
Mechanobiological-based control of mesenchymal stromal cells (MSCs) to facilitate engineering and regeneration of load-bearing tissues requires systematic investigations of specific dynamic mechanical stimulation protocols. Using deformable membrane microdevice arrays paired with combinatorial experimental design and modeling, we probed the individual and integrative effects of mechanical stimulation parameters (strain magnitude, rate at which strain is changed, and duty period) on myofibrogenesis and matrix production of MSCs in three-dimensional hydrogels. These functions were found to be dominantly influenced by a previously unidentified, higher-order interactive effect between strain magnitude and duty period. Empirical models based on our combinatorial cue-response data predicted an optimal loading regime in which strain magnitude and duty period were increased synchronously over time, which was validated to most effectively promote MSC matrix production. These findings inform the design of loading regimes for MSC-based engineered tissues and validate a broadly applicable approach to probe multifactorial regulating effects of mechanobiological cues.
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Affiliation(s)
- Haijiao Liu
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, ON M5G 1M1, Canada
| | - Jenna F Usprech
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, ON M5G 1M1, Canada
| | - Prabu Karthick Parameshwar
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, ON M5G 1M1, Canada
| | - Yu Sun
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada.
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
| | - Craig A Simmons
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada.
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
- Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, ON M5G 1M1, Canada
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20
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Tran R, Moraes C, Hoesli CA. Developmentally-Inspired Biomimetic Culture Models to Produce Functional Islet-Like Cells From Pluripotent Precursors. Front Bioeng Biotechnol 2020; 8:583970. [PMID: 33117786 PMCID: PMC7576674 DOI: 10.3389/fbioe.2020.583970] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 09/08/2020] [Indexed: 12/28/2022] Open
Abstract
Insulin-producing beta cells sourced from pluripotent stem cells hold great potential as a virtually unlimited cell source to treat diabetes. Directed pancreatic differentiation protocols aim to mimic various stimuli present during embryonic development through sequential changes of in vitro culture conditions. This is commonly accomplished by the timed addition of soluble signaling factors, in conjunction with cell-handling steps such as the formation of 3D cell aggregates. Interestingly, when stem cells at the pancreatic progenitor stage are transplanted, they form functional insulin-producing cells, suggesting that in vivo microenvironmental cues promote beta cell specification. Among these cues, biophysical stimuli have only recently emerged in the context of optimizing pancreatic differentiation protocols. This review focuses on studies of cell–microenvironment interactions and their impact on differentiating pancreatic cells when considering cell signaling, cell–cell and cell–ECM interactions. We highlight the development of in vitro cell culture models that allow systematic studies of pancreatic cell mechanobiology in response to extracellular matrix proteins, biomechanical effects, soluble factor modulation of biomechanics, substrate stiffness, fluid flow and topography. Finally, we explore how these new mechanical insights could lead to novel pancreatic differentiation protocols that improve efficiency, maturity, and throughput.
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Affiliation(s)
- Raymond Tran
- Department of Chemical Engineering, McGill University, Montreal, QC, Canada
| | - Christopher Moraes
- Department of Chemical Engineering, McGill University, Montreal, QC, Canada.,Department of Biomedical Engineering, McGill University, Montreal, QC, Canada
| | - Corinne A Hoesli
- Department of Chemical Engineering, McGill University, Montreal, QC, Canada.,Department of Biomedical Engineering, McGill University, Montreal, QC, Canada
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21
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Li X, Wang J. Mechanical tumor microenvironment and transduction: cytoskeleton mediates cancer cell invasion and metastasis. Int J Biol Sci 2020; 16:2014-2028. [PMID: 32549750 PMCID: PMC7294938 DOI: 10.7150/ijbs.44943] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 04/15/2020] [Indexed: 12/13/2022] Open
Abstract
Metastasis is a complicated, multistep process that is responsible for over 90% of cancer-related death. Metastatic disease or the movement of cancer cells from one site to another requires dramatic remodeling of the cytoskeleton. The regulation of cancer cell migration is determined not only by biochemical factors in the microenvironment but also by the biomechanical contextual information provided by the extracellular matrix (ECM). The responses of the cytoskeleton to chemical signals are well characterized and understood. However, the mechanisms of response to mechanical signals in the form of externally applied force and forces generated by the ECM are still poorly understood. Furthermore, understanding the way cellular mechanosensors interact with the physical properties of the microenvironment and transmit the signals to activate the cytoskeletal movements may help identify an effective strategy for the treatment of cancer. Here, we will discuss the role of tumor microenvironment during cancer metastasis and how physical forces remodel the cytoskeleton through mechanosensing and transduction.
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Affiliation(s)
- Xingchen Li
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing, 100044, China
| | - Jianliu Wang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing, 100044, China
- Beijing Key Laboratory of Female Pelvic Floor Disorders Diseases, Beijing, 100044, China
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22
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Ma Z, Sagrillo-Fagundes L, Tran R, Parameshwar PK, Kalashnikov N, Vaillancourt C, Moraes C. Biomimetic Micropatterned Adhesive Surfaces To Mechanobiologically Regulate Placental Trophoblast Fusion. ACS APPLIED MATERIALS & INTERFACES 2019; 11:47810-47821. [PMID: 31773938 DOI: 10.1021/acsami.9b19906] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The placental syncytiotrophoblast is a giant multinucleated cell that forms a tree-like structure and regulates transport between mother and baby during development. It is maintained throughout pregnancy by continuous fusion of trophoblast cells, and disruptions in fusion are associated with considerable adverse health effects including diseases such as preeclampsia. Developing predictive control over cell fusion in culture models is hence of critical importance in placental drug discovery and transport studies, but this can currently be only partially achieved with biochemical factors. Here, we investigate whether biophysical signals associated with budding morphogenesis during development of the placental villous tree can synergistically direct and enhance trophoblast fusion. We use micropatterning techniques to manipulate physical stresses in engineered microtissues and demonstrate that biomimetic geometries simulating budding robustly enhance fusion and alter spatial patterns of synthesis of pregnancy-related hormones. These findings indicate that biophysical signals play a previously unrecognized and significant role in regulating placental fusion and function, in synergy with established soluble signals. More broadly, our studies demonstrate that biomimetic strategies focusing on tissue mechanics can be important approaches to design, build, and test placental tissue cultures for future studies of pregnancy-related drug safety, efficacy, and discovery.
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Affiliation(s)
- Zhenwei Ma
- Department of Chemical Engineering , McGill University , Montréal , QC H3A 0C5 , Canada
| | - Lucas Sagrillo-Fagundes
- Department of Chemical Engineering , McGill University , Montréal , QC H3A 0C5 , Canada
- INRS-Centre Armand Frappier Santé Biotehnologie and Réseau Intersectoriel de Recherche en Santé de l'Université du Québec , Laval , QC H7V 1B7 , Canada
- Center for Interdisciplinary Research on Well-Being, Health, Society and Environment , Université du Québec à Montréal , Montréal , QC H3C 3P8 , Canada
| | - Raymond Tran
- Department of Chemical Engineering , McGill University , Montréal , QC H3A 0C5 , Canada
| | - Prabu Karthick Parameshwar
- Department of Biological and Biomedical Engineering , McGill University , Montréal , QC H3A 2B4 , Canada
| | - Nikita Kalashnikov
- Department of Chemical Engineering , McGill University , Montréal , QC H3A 0C5 , Canada
| | - Cathy Vaillancourt
- INRS-Centre Armand Frappier Santé Biotehnologie and Réseau Intersectoriel de Recherche en Santé de l'Université du Québec , Laval , QC H7V 1B7 , Canada
- Center for Interdisciplinary Research on Well-Being, Health, Society and Environment , Université du Québec à Montréal , Montréal , QC H3C 3P8 , Canada
| | - Christopher Moraes
- Department of Chemical Engineering , McGill University , Montréal , QC H3A 0C5 , Canada
- Department of Biological and Biomedical Engineering , McGill University , Montréal , QC H3A 2B4 , Canada
- Rosalind and Morris Goodman Cancer Research Centre , McGill University , Montréal , QC H3A 1A3 , Canada
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23
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Siddiqui S, Chandrasekaran A, Lin N, Tufenkji N, Moraes C. Microfluidic Shear Assay to Distinguish between Bacterial Adhesion and Attachment Strength on Stiffness-Tunable Silicone Substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8840-8849. [PMID: 31177781 DOI: 10.1021/acs.langmuir.9b00803] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Tuning surface composition and stiffness is now an established strategy to improve the integration of medical implants. Recent evidence suggests that matrix stiffness affects bacterial adhesion, but contradictory findings have been reported in the literature. Distinguishing between the effects of bacterial adhesion and attachment strength on these surfaces may help interpret these findings. Here, we develop a precision microfluidic shear assay to quantify bacterial adhesion strength on stiffness-tunable and biomolecule-coated silicone materials. We demonstrate that bacteria are more strongly attached to soft silicones, compared to stiff silicones; as determined by retention against increasing shear flows. Interestingly, this effect is reduced when the surface is coated with matrix biomolecules. These results demonstrate that bacteria do sense and respond to stiffness of the surrounding environment and that precisely defined assays are needed to understand the interplay among surface mechanics, composition, and bacterial binding.
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24
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Occhetta P, Mainardi A, Votta E, Vallmajo-Martin Q, Ehrbar M, Martin I, Barbero A, Rasponi M. Hyperphysiological compression of articular cartilage induces an osteoarthritic phenotype in a cartilage-on-a-chip model. Nat Biomed Eng 2019; 3:545-557. [PMID: 31160722 DOI: 10.1038/s41551-019-0406-3] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 04/17/2019] [Indexed: 12/21/2022]
Abstract
Owing to population aging, the social impact of osteoarthritis (OA)-the most common musculoskeletal disease-is expected to increase dramatically. Yet, therapy is still limited to palliative treatments or surgical intervention, and disease-modifying OA (DMOA) drugs are scarce, mainly because of the absence of relevant preclinical OA models. Therefore, in vitro models that can reliably predict the efficacy of DMOA drugs are needed. Here, we show, using a newly developed microphysiological cartilage-on-a-chip model that enables the application of strain-controlled compression to three-dimensional articular cartilage microtissue, that a 30% confined compression recapitulates the mechanical factors involved in OA pathogenesis and is sufficient to induce OA traits. Such hyperphysiological compression triggers a shift in cartilage homeostasis towards catabolism and inflammation, hypertrophy, and the acquisition of a gene expression profile akin to those seen in clinical osteoarthritic tissue. The cartilage on-a-chip model may enable the screening of DMOA candidates.
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Affiliation(s)
- Paola Occhetta
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Andrea Mainardi
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland.,Department of Biomedical Engineering, University of Basel, Allschwil, Switzerland.,Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy
| | - Emiliano Votta
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy
| | - Queralt Vallmajo-Martin
- Department of Obstetrics, University Hospital Zurich, Zurich, Switzerland.,Zurich Centre for Integrative Human Physiology, Zurich, Switzerland
| | - Martin Ehrbar
- Department of Obstetrics, University Hospital Zurich, Zurich, Switzerland.,Zurich Centre for Integrative Human Physiology, Zurich, Switzerland
| | - Ivan Martin
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland.,Department of Biomedical Engineering, University of Basel, Allschwil, Switzerland
| | - Andrea Barbero
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland.
| | - Marco Rasponi
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy
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25
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Mestres G, Perez RA, D’Elía NL, Barbe L. Advantages of microfluidic systems for studying cell-biomaterial interactions—focus on bone regeneration applications. Biomed Phys Eng Express 2019. [DOI: 10.1088/2057-1976/ab1033] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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26
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Lee SH, Jun BH. Advances in dynamic microphysiological organ-on-a-chip: Design principle and its biomedical application. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.11.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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27
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Huang J, Chen Y, Tang C, Fei Y, Wu H, Ruan D, Paul ME, Chen X, Yin Z, Heng BC, Chen W, Shen W. The relationship between substrate topography and stem cell differentiation in the musculoskeletal system. Cell Mol Life Sci 2019; 76:505-521. [PMID: 30390116 PMCID: PMC11105278 DOI: 10.1007/s00018-018-2945-2] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/15/2018] [Accepted: 10/12/2018] [Indexed: 12/11/2022]
Abstract
It is well known that biomaterial topography can exert a profound influence on various cellular functions such as migration, polarization, and adhesion. With the development and refinement of manufacturing technology, much research has recently been focused on substrate topography-induced cell differentiation, particularly in the field of tissue engineering. Even without biological and chemical stimuli, the differentiation of stem cells can also be initiated by various biomaterials with different topographic features. However, the underlying mechanisms of this biological phenomenon remain elusive. During the past few decades, many researchers have demonstrated that cells can sense the topography of materials through the assembly and polymerization of membrane proteins. Following the activation of RHO, TGF-b or FAK signaling pathways, cells can be induced into various differentiation states. But these signaling pathways often coincide with canonical mechanical transduction pathways, and no firm conclusion has been reached among researchers in this field on topography-specific signaling pathways. On the other hand, some substrate topographies are reported to have the ability to inhibit differentiation and maintain the 'stemness' of stem cells. In this review, we will summarize the role of topography in musculoskeletal system regeneration and explore possible topography-related signaling pathways involved in cell differentiation.
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Affiliation(s)
- Jiayun Huang
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, 310009, China
- Dr. Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang, 310000, China
- Orthopaedics Research Institute of Zhejiang University, Zhejiang, China
- Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang, 310000, China
- China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
| | - Yangwu Chen
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, 310009, China
- Dr. Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang, 310000, China
- Orthopaedics Research Institute of Zhejiang University, Zhejiang, China
- Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang, 310000, China
- China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
| | - Chenqi Tang
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, 310009, China
- Dr. Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang, 310000, China
- Orthopaedics Research Institute of Zhejiang University, Zhejiang, China
- Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang, 310000, China
- China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
| | - Yang Fei
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, 310009, China
- Orthopaedics Research Institute of Zhejiang University, Zhejiang, China
- China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
| | - Haoyu Wu
- Dr. Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang, 310000, China
- Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang, 310000, China
| | - Dengfeng Ruan
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, 310009, China
- Orthopaedics Research Institute of Zhejiang University, Zhejiang, China
- China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
| | - Maswikiti Ewetse Paul
- Dr. Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang, 310000, China
- Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang, 310000, China
| | - Xiao Chen
- Dr. Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang, 310000, China
- Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang, 310000, China
- China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
| | - Zi Yin
- Dr. Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang, 310000, China
- Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang, 310000, China
| | - Boon Chin Heng
- Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Weishan Chen
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, 310009, China
| | - Weiliang Shen
- Department of Orthopedic Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang, 310009, China.
- Dr. Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Zhejiang, 310000, China.
- Orthopaedics Research Institute of Zhejiang University, Zhejiang, China.
- Department of Sports Medicine, School of Medicine, Zhejiang University, Zhejiang, 310000, China.
- China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China.
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Towards Three-Dimensional Dynamic Regulation and In Situ Characterization of Single Stem Cell Phenotype Using Microfluidics. Mol Biotechnol 2018; 60:843-861. [DOI: 10.1007/s12033-018-0113-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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29
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Chu G, Shi C, Lin J, Wang S, Wang H, Liu T, Yang H, Li B. Biomechanics in Annulus Fibrosus Degeneration and Regeneration. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1078:409-420. [PMID: 30357635 DOI: 10.1007/978-981-13-0950-2_21] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Degenerative disc degeneration (DDD) is the major cause of low back pain, which seriously affects the life of patients. Current surgical and conservative treatments only relieve the pain temporarily, yet fail to restore the normal biomechanics and functions of healthy spine. Indeed, high recurrence of disc herniation commonly happens after discectomy. Degenerative changes in biomechanical and structural properties of the intervertebral disc (IVD), including fissures in annulus fibrosus (AF) and volume loss of nucleus pulposus (NP), mainly contribute to DDD development. AF plays a critical role in the biomechanical properties of IVD as it structural integrity is essential to confine NP and maintain physiological intradiscal pressure under loading. Maintaining the homeostasis of AF and NP, and thereby IVD, requires regulation of their biomechanics, which is also involved in the onset and subsequent development of AF degeneration. Therefore, it is essential to understand the biomechanical changes of AF during degeneration, which can also provide valuable insights into the repair and regeneration of AF. In this review, we focus on the biomechanical properties of AF tissue associated with its homeostasis and degeneration, and discuss the biomechanical stimulus required for regeneration of AF. We also provide an overview of recent strategies to target and modulate cell mechanics toward AF regeneration.
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Affiliation(s)
- Genglei Chu
- Orthopaedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China.,Department of Orthopaedic Surgery, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China
| | - Chen Shi
- Department of Biomedical Engineering, National University of Singapore, Singapore, Singapore
| | - Jun Lin
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China
| | - Shenghao Wang
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China
| | - Huan Wang
- Orthopaedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China.,Department of Orthopaedic Surgery, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China
| | - Tao Liu
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China
| | - Huilin Yang
- Orthopaedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China.,Department of Orthopaedic Surgery, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China
| | - Bin Li
- Orthopaedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China. .,Department of Orthopaedic Surgery, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China. .,China Orthopaedic Regenerative Medicine Group (CORMed), Hangzhou, Zhejiang, China.
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30
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Rezaei Kolahchi A, Khadem Mohtaram N, Pezeshgi Modarres H, Mohammadi MH, Geraili A, Jafari P, Akbari M, Sanati-Nezhad A. Microfluidic-Based Multi-Organ Platforms for Drug Discovery. MICROMACHINES 2016; 7:E162. [PMID: 30404334 PMCID: PMC6189912 DOI: 10.3390/mi7090162] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 08/23/2016] [Accepted: 08/24/2016] [Indexed: 12/18/2022]
Abstract
Development of predictive multi-organ models before implementing costly clinical trials is central for screening the toxicity, efficacy, and side effects of new therapeutic agents. Despite significant efforts that have been recently made to develop biomimetic in vitro tissue models, the clinical application of such platforms is still far from reality. Recent advances in physiologically-based pharmacokinetic and pharmacodynamic (PBPK-PD) modeling, micro- and nanotechnology, and in silico modeling have enabled single- and multi-organ platforms for investigation of new chemical agents and tissue-tissue interactions. This review provides an overview of the principles of designing microfluidic-based organ-on-chip models for drug testing and highlights current state-of-the-art in developing predictive multi-organ models for studying the cross-talk of interconnected organs. We further discuss the challenges associated with establishing a predictive body-on-chip (BOC) model such as the scaling, cell types, the common medium, and principles of the study design for characterizing the interaction of drugs with multiple targets.
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Affiliation(s)
- Ahmad Rezaei Kolahchi
- BioMEMS and Bioinspired Microfluidic Laboratory, Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
| | - Nima Khadem Mohtaram
- Laboratory for Innovations in MicroEngineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Division of Medical Sciences, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
| | - Hassan Pezeshgi Modarres
- BioMEMS and Bioinspired Microfluidic Laboratory, Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
| | - Mohammad Hossein Mohammadi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9516, Iran.
| | - Armin Geraili
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9516, Iran.
| | - Parya Jafari
- Department of Electrical Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9516, Iran.
| | - Mohsen Akbari
- Laboratory for Innovations in MicroEngineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Division of Medical Sciences, University of Victoria, Victoria, BC V8P 5C2, Canada.
| | - Amir Sanati-Nezhad
- BioMEMS and Bioinspired Microfluidic Laboratory, Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
- Center for Bioengineering Research and Education, Biomedical Engineering Program, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
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31
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Suriano R, Zandrini T, De Marco C, Osellame R, Turri S, Bragheri F. Nanomechanical probing of soft matter through hydrophobic AFM tips fabricated by two-photon polymerization. NANOTECHNOLOGY 2016; 27:155702. [PMID: 26926558 DOI: 10.1088/0957-4484/27/15/155702] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Atomic force microscopy (AFM) nanoindentation of soft materials is a powerful tool for probing mechanical properties of biomaterials. Though many results have been reported in this field over the last decade, adhesion forces between the tip and the sample hinder the elastic modulus measurement when hydrophilic soft samples are investigated. Here, two-photon polymerization (2PP) technology was used to fabricate hydrophobic perfluoropolyether-based AFM tips. The hydrophobic 2PP tips allowed us to overcome the limitations of commercial and functionalized tips as well as to successfully measure the elastic modulus of medically relevant soft materials in air. Our results obtained in the characterization of poly(dimethyl siloxane) and polyethylene glycol hydrogels showed lower adhesion forces over a larger measurement range when compared to measurements performed with commercial tips. The elastic moduli measured by means of hydrophobic 2PP AFM tips were also found to be comparable to those obtained using conventional techniques for macroscopic samples. We successfully showed that the hydrophobic AFM tips developed by this highly versatile technology enable the study of mechanical properties of soft matter, benefiting from reduced sample-tip interactions, and a custom-made shape and dimension of the tips.
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Affiliation(s)
- Raffaella Suriano
- Dipartimento di Chimica, Materiali e Ingegneria Chimica 'Giulio Natta', Politecnico di Milano, P.zza Leonardo da Vinci 32, 20133 Milano, Italy
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32
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Liu H, Usprech J, Sun Y, Simmons CA. A microfabricated platform with hydrogel arrays for 3D mechanical stimulation of cells. Acta Biomater 2016; 34:113-124. [PMID: 26646540 DOI: 10.1016/j.actbio.2015.11.054] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 10/15/2015] [Accepted: 11/25/2015] [Indexed: 12/11/2022]
Abstract
Cellular microenvironments present cells with multiple stimuli, including not only soluble biochemical and insoluble matrix cues but also mechanical factors. Biomaterial array platforms have been used to combinatorially and efficiently probe and define two-dimensional (2D) and 3D microenvironmental cues to guide cell functions for tissue engineering applications. However, there are few examples of array platforms that include dynamic mechanical forces, particularly to enable stretching of 3D cell-seeded biomaterials, which is relevant to engineering connective and cardiovascular tissues. Here we present a deformable membrane platform that enables 3D dynamic mechanical stretch of arrayed biomaterial constructs. Cell-seeded polyethylene glycol norbornene (PEG-NB) hydrogels were bound to miniaturized deformable membranes via a thiol-ene reaction with off-stoichiometry thiol-ene based polydimethylsiloxane (OSTE-PDMS) as the membrane material. Bonding to OSTE-PDMS enabled the 3D hydrogel microconstructs to be cyclically deformed and stretched by the membrane. As a first demonstration, human mesenchymal stromal cells (MSCs) embedded in PEG-NB were stretched for several days. They were found to be viable, spread in the 3D hydrogels, and exhibited a contractile myofibroblast phenotype when exposed to dynamic 3D mechanical deformation. This platform, which is readily scalable to larger arrays, enables systematic interrogation of the relationships between combinations of 3D mechanobiological cues and cellular responses, and thus has the potential to identify strategies to predictably control the construction of functional engineered tissues. STATEMENT OF SIGNIFICANCE Current high-throughput biomaterial screening approaches fail to consider the effects of dynamic mechanical stimulation, despite its importance in a wide variety of regenerative medicine applications. To meet this need, we developed a deformable membrane platform that enables 3D dynamic stretch of arrayed biomaterial constructs. Our approach combines microtechnologies fabricated with off-stoichiometry thiol-ene based polydimethylsiloxane membranes that can covalently bond cell-seeded polyethylene glycol norbornene 3D hydrogels, a model biomaterial with tunable adhesive, elastic and degradation characteristics. As a first demonstration, we show that human mesenchymal stromal cells embedded in hydrogels and subjected to dynamic mechanical stimulation undergo myofibroblast differentiation. This system is readily scaled up to larger arrays, and will enable systematic and efficient screening of combinations of 3D mechanobiological and biomaterial cues on cell fate and function.
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Affiliation(s)
- Haijiao Liu
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto M5S 3G8, Canada; Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto M5S 3G9, Canada
| | - Jenna Usprech
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto M5S 3G9, Canada
| | - Yu Sun
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto M5S 3G8, Canada; Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto M5S 3G9, Canada.
| | - Craig A Simmons
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto M5S 3G8, Canada; Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto M5S 3G9, Canada.
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33
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Biomaterials approaches to modeling macrophage-extracellular matrix interactions in the tumor microenvironment. Curr Opin Biotechnol 2016; 40:16-23. [PMID: 26921768 DOI: 10.1016/j.copbio.2016.02.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 02/03/2016] [Accepted: 02/04/2016] [Indexed: 01/12/2023]
Abstract
Tumors are characterized by aberrant extracellular matrix (ECM) remodeling and chronic inflammation. While advances in biomaterials and tissue engineering strategies have led to important new insights regarding the role of ECM composition, structure, and mechanical properties in cancer in general, the functional link between these parameters and macrophage phenotype is poorly understood. Nevertheless, increasing experimental evidence suggests that macrophage behavior is similarly controlled by physicochemical properties of the ECM and consequential changes in mechanosignaling. Here, we will summarize the current knowledge of macrophage biology and ECM-mediated differences in mechanotransduction and discuss future opportunities of biomaterials and tissue engineering platforms to interrogate the functional relationship between these parameters and their relevance to cancer.
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34
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Integrative Utilization of Microenvironments, Biomaterials and Computational Techniques for Advanced Tissue Engineering. J Biotechnol 2015; 212:71-89. [DOI: 10.1016/j.jbiotec.2015.08.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 08/02/2015] [Accepted: 08/11/2015] [Indexed: 01/13/2023]
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35
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Nascimento-Brito S, Paulo Zukurov J, Maricato JT, Volpini AC, Salim ACM, Araújo FMG, Coimbra RS, Oliveira GC, Antoneli F, Janini LMR. HIV-1 Tropism Determines Different Mutation Profiles in Proviral DNA. PLoS One 2015; 10:e0139037. [PMID: 26413773 PMCID: PMC4587555 DOI: 10.1371/journal.pone.0139037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 09/07/2015] [Indexed: 01/19/2023] Open
Abstract
In order to establish new infections HIV-1 particles need to attach to receptors expressed on the cellular surface. HIV-1 particles interact with a cell membrane receptor known as CD4 and subsequently with another cell membrane molecule known as a co-receptor. Two major different co-receptors have been identified: C-C chemokine Receptor type 5 (CCR5) and C-X-C chemokine Receptor type 4 (CXCR4) Previous reports have demonstrated cellular modifications upon HIV-1 binding to its co-receptors including gene expression modulations. Here we investigated the effect of viral binding to either CCR5 or CXCR4 co-receptors on viral diversity after a single round of reverse transcription. CCR5 and CXCR4 pseudotyped viruses were used to infect non-stimulated and stimulated PBMCs and purified CD4 positive cells. We adopted the SOLiD methodology to sequence virtually the entire proviral DNA from all experimental infections. Infections with CCR5 and CXCR4 pseudotyped virus resulted in different patterns of genetic diversification. CCR5 virus infections produced extensive proviral diversity while in CXCR4 infections a more localized substitution process was observed. In addition, we present pioneering results of a recently developed method for the analysis of SOLiD generated sequencing data applicable to the study of viral quasi-species. Our findings demonstrate the feasibility of viral quasi-species evaluation by NGS methodologies. We presented for the first time strong evidence for a host cell driving mechanism acting on the HIV-1 genetic variability under the control of co-receptor stimulation. Additional investigations are needed to further clarify this question, which is relevant to viral diversification process and consequent disease progression.
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Affiliation(s)
- Sieberth Nascimento-Brito
- Departamento de Microbiologia e Imunologia Veterinária, Universidade Federal Rural do Rio de Janeiro (UFRRJ), Rio de Janeiro, Brazil
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
| | | | - Juliana T. Maricato
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
| | - Angela C. Volpini
- Genomics and Computational Biology Group, Research Center René Rachou (CPqRR), Fundação Oswaldo Cruz (FIOCRUZ), Belo Horizonte, Brazil
| | - Anna Christina M. Salim
- Genomics and Computational Biology Group, Research Center René Rachou (CPqRR), Fundação Oswaldo Cruz (FIOCRUZ), Belo Horizonte, Brazil
| | - Flávio M. G. Araújo
- Genomics and Computational Biology Group, Research Center René Rachou (CPqRR), Fundação Oswaldo Cruz (FIOCRUZ), Belo Horizonte, Brazil
| | - Roney S. Coimbra
- Biosystems Informatics Group, CPqRR, FIOCRUZ, Belo Horizonte, Brazil
| | - Guilherme C. Oliveira
- Genomics and Computational Biology Group, Research Center René Rachou (CPqRR), Fundação Oswaldo Cruz (FIOCRUZ), Belo Horizonte, Brazil
| | - Fernando Antoneli
- Departamento de Informática em Saúde, EPM, UNIFESP, São Paulo, Brazil
- Laboratório de Biocomplexidade e Genômica Evolutiva, EPM, UNIFESP, São Paulo, Brazil
| | - Luiz Mário R. Janini
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
- Departamento de Medicina, EPM, UNIFESP, São Paulo, Brazil
- * E-mail:
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36
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Zhu X, Bouffanais R, Yue DKP. Interplay between motility and cell-substratum adhesion in amoeboid cells. BIOMICROFLUIDICS 2015; 9:054112. [PMID: 26487898 PMCID: PMC4592429 DOI: 10.1063/1.4931762] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 09/15/2015] [Indexed: 05/07/2023]
Abstract
The effective migration of amoeboid cells requires a fine regulation of cell-substratum adhesion. These entwined processes have been shown to be regulated by a host of biophysical and biochemical cues. Here, we reveal the pivotal role played by calcium-based mechanosensation in the active regulation of adhesion resulting in a high migratory adaptability. Using mechanotactically driven Dictyostelium discoideum amoebae, we uncover the existence of optimal mechanosensitive conditions-corresponding to specific levels of extracellular calcium-for persistent directional migration over physicochemically different substrates. When these optimal mechanosensitive conditions are met, noticeable enhancement in cell migration directionality and speed is achieved, yet with significant differences among the different substrates. In the same narrow range of calcium concentrations that yields optimal cellular mechanosensory activity, we uncovered an absolute minimum in cell-substratum adhesion activity, for all considered substrates, with differences in adhesion strength among them amplified. The blocking of the mechanosensitive ion channels with gadolinium-i.e., the inhibition of the primary mechanosensory apparatus-hampers the active reduction in substrate adhesion, thereby leading to the same undifferentiated and drastically reduced directed migratory response. The adaptive behavioral responses of Dictyostelium cells sensitive to substrates with varying physicochemical properties suggest the possibility of novel surface analyses based on the mechanobiological ability of mechanosensitive and guidable cells to probe substrates at the nanometer-to-micrometer level.
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Affiliation(s)
- Xiaoying Zhu
- Singapore University of Technology and Design , 8 Somapah Road, Singapore 487372
| | - Roland Bouffanais
- Singapore University of Technology and Design , 8 Somapah Road, Singapore 487372
| | - Dick K P Yue
- Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
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37
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Short-term effects of microstructured surfaces: role in cell differentiation toward a contractile phenotype. J Appl Biomater Funct Mater 2015; 13:e92-9. [PMID: 24756781 PMCID: PMC6161806 DOI: 10.5301/jabfm.5000186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/20/2013] [Indexed: 11/20/2022] Open
Abstract
Cell adhesion plays a key role in cell behavior, in terms of migration, proliferation, differentiation and apoptosis. All of these events concur with tissue regeneration and remodeling mechanisms, integrating a complex network of intracellular signaling modules. Morphogenetic responses, which involve changes in cell shape, proliferation and differentiation, are thought to be controlled by both biochemical and biophysical cues. Indeed, the extracellular matrix not only displays adhesive ligands necessary for cell adhesion but also plays an essential biomechanical role — responsible, for instance, for the acquisition of the contractile phenotype. The substrate topography around the forming tissues and the associated mechanical stresses that are generated regulate cellular morphology, proliferation and differentiation. Thus, the ability to tailor topographical features around cells can be a crucial design parameter in tissue engineering applications, inducing cells to exhibit the required performances. In this work, we designed micropillared substrates using highly spaced arrays (interspacing equal to 25 μm) to evaluate the effects of topography on C2C12 myoblasts' adhesion and differentiation. Optical and fluorescence microscopy images were used to observe cell adhesion, together with Western blot analysis on vinculin and focal adhesion kinase (FAK) expression, a protein highly involved in adhesive processes. Differentiation marker (Myf5, myogenin and myosin heavy chain [MHC]) expression was also studied, in relation to the effect of different substrate topographies on the enhancement of a contractile phenotype. Our results demonstrated that microstructured surfaces may play a key role in the regeneration of functional tissues.
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38
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Hao J, Zhang Y, Jing D, Shen Y, Tang G, Huang S, Zhao Z. Mechanobiology of mesenchymal stem cells: Perspective into mechanical induction of MSC fate. Acta Biomater 2015; 20:1-9. [PMID: 25871537 DOI: 10.1016/j.actbio.2015.04.008] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 03/26/2015] [Accepted: 04/07/2015] [Indexed: 02/05/2023]
Abstract
Bone marrow-derived mesenchymal stem and stromal cells (MSCs) are promising candidates for cell-based therapies in diverse conditions including tissue engineering. Advancement of these therapies relies on the ability to direct MSCs toward specific cell phenotypes. Despite identification of applied forces that affect self-maintenance, proliferation, and differentiation of MSCs, mechanisms underlying the integration of mechanically induced signaling cascades and interpretation of mechanical signals by MSCs remain elusive. During the past decade, many researchers have demonstrated that external applied forces can activate osteogenic signaling pathways in MSCs, including Wnt, Ror2, and Runx2. Besides, recent advances have highlighted the critical role of internal forces due to cell-matrix interaction in MSC function. These internal forces can be achieved by the materials that cells reside in through its mechanical properties, such as rigidity, topography, degradability, and substrate patterning. MSCs can generate contractile forces to sense these mechanical properties and thereby perceive mechanical information that directs broad aspects of MSC functions, including lineage commitment. Although many signaling pathways have been elucidated in material-induced lineage specification of MSCs, discovering the mechanisms by which MSCs respond to such cell-generated forces is still challenging because of the highly intricate signaling milieu present in MSC environment. However, bioengineers are bridging this gap by developing platforms to control mechanical cues with improved throughput and precision, thereby enabling further investigation of mechanically induced MSC functions. In this review, we discuss the most recent advances that how applied forces and cell-generated forces may be engineered to determine MSC fate, and overview a subset of the operative signal transduction mechanisms and experimental platforms that have emerged in MSC mechanobiology research. Our main goal is to provide an up-to-date view of MSC mechanobiology that is relevant to both mechanical loading and mechanical properties of the environment, and introduce these emerging platforms for tissue engineering use.
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Moraes C, Labuz JM, Shao Y, Fu J, Takayama S. Supersoft lithography: candy-based fabrication of soft silicone microstructures. LAB ON A CHIP 2015; 15:3760-5. [PMID: 26245893 PMCID: PMC4550510 DOI: 10.1039/c5lc00722d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We designed a fabrication technique able to replicate microstructures in soft silicone materials (E < 1 kPa). Sugar-based 'hard candy' recipes from the confectionery industry were modified to be compatible with silicone processing conditions, and used as templates for replica molding. Microstructures fabricated in soft silicones can then be easily released by dissolving the template in water. We anticipate that this technique will be of particular importance in replicating physiologically soft, microstructured environments for cell culture, and demonstrate a first application in which intrinsically soft microstructures are used to measure forces generated by fibroblast-laden contractile tissues.
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Affiliation(s)
- Christopher Moraes
- Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, QC H3A 2B2, Canada
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, NCRC, MI 48109-2800, USA
| | - Joseph M. Labuz
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, NCRC, MI 48109-2800, USA
| | - Yue Shao
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Jianping Fu
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Shuichi Takayama
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, NCRC, MI 48109-2800, USA
- Macromolecular science and Engineering Center, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
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Leung BM, Moraes C, Cavnar SP, Luker KE, Luker GD, Takayama S. Microscale 3D collagen cell culture assays in conventional flat-bottom 384-well plates. ACTA ACUST UNITED AC 2014; 20:138-45. [PMID: 25510473 DOI: 10.1177/2211068214563793] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Three-dimensional (3D) culture systems such as cell-laden hydrogels are superior to standard two-dimensional (2D) monolayer cultures for many drug-screening applications. However, their adoption into high-throughput screening (HTS) has been lagging, in part because of the difficulty of incorporating these culture formats into existing robotic liquid handling and imaging infrastructures. Dispensing cell-laden prepolymer solutions into 2D well plates is a potential solution but typically requires large volumes of reagents to avoid evaporation during polymerization, which (1) increases costs, (2) makes drug penetration variable and (3) complicates imaging. Here we describe a technique to efficiently produce 3D microgels using automated liquid-handling systems and standard, nonpatterned, flat-bottomed, 384-well plates. Sub-millimeter-diameter, cell-laden collagen gels are deposited on the bottom of a ~2.5 mm diameter microwell with no concerns about evaporation or meniscus effects at the edges of wells, using aqueous two-phase system patterning. The microscale cell-laden collagen-gel constructs are readily imaged and readily penetrated by drugs. The cytotoxicity of chemotherapeutics was monitored by bioluminescence and demonstrated that 3D cultures confer chemoresistance as compared with similar 2D cultures. Hence, these data demonstrate the importance of culturing cells in 3D to obtain realistic cellular responses. Overall, this system provides a simple and inexpensive method for integrating 3D culture capability into existing HTS infrastructure.
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Affiliation(s)
- Brendan M Leung
- Department of Biomedical Engineering, Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Christopher Moraes
- Department of Biomedical Engineering, Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA Department of Chemical Engineering, McGill University, Montreal, Canada
| | - Stephen P Cavnar
- Department of Biomedical Engineering, Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Kathryn E Luker
- Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Gary D Luker
- Department of Biomedical Engineering, Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA Center for Molecular Imaging, Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Shuichi Takayama
- Department of Biomedical Engineering, Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI, USA Division of Nano-Bio and Chemical Engineering WCU Project, UNIST, Republic of Korea
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A microfabricated, optically accessible device to study the effects of mechanical cues on collagen fiber organization. Biomed Microdevices 2014; 16:255-67. [PMID: 24390073 DOI: 10.1007/s10544-013-9829-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
As the primary structural protein of our bodies, fibrillar collagen and its organizational patterns determine the biomechanics and shape of tissues. While the molecular assembly of individual fibrils is well understood, the mechanisms determining the arrangement of fibers and thus the shape and form of tissues remain largely unknown. We have developed a cell culture model that successfully recapitulates early tissue development and the de novo deposition of collagen fibers to investigate the role of mechanical cues on collagen fiber alignment. The devices used a thin, collagen-coated deformable PDMS membrane inside a tissue culture well built on microscope-grade coverslips. Deformations and strains in the PDMS membrane were quantified by tracking fluorescent bead displacement and through the use of a COMSOL model. Cyclical strains were applied to serum-cultured rabbit corneal cells at 0.5 Hz for 24-48 h and showed a preferred alignment after 36 h of cyclical loading. Cells cultured with ascorbic acid under methylcellulose serum-free conditions deposited a collagenous matrix that was visible under live second harmonic generation microscopy at week 4. Our microfabricated tissue culture system allows for the controllable application of a wide range of stress profiles to cells, and for the observation and quantification of cells and de novo collagen formation in vitro. Future studies will involve the fabrication of models to study the formation and organization of collagen in ocular diseases.
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Kim BC, Moraes C, Huang J, Matsuoka T, Thouless M, Takayama S. Fracture-based fabrication of normally closed, adjustable, and fully reversible microscale fluidic channels. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:4020-4029. [PMID: 24942855 PMCID: PMC4192030 DOI: 10.1002/smll.201400147] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 04/30/2014] [Indexed: 05/25/2023]
Abstract
Adjustable fluidic structures play an important role in microfluidic systems. Fracture of multilayered materials under applied tension has been previously demonstrated as a convenient, simple, and inexpensive approach to fabricate nanoscale adjustable structures; here, it is demonstrated how to extend this concept to the microscale. This is achieved by a novel pairing of materials that leverages fracture mechanics to limit crack formation to a specified region, allowing to create size-controllable and adjustable microfluidic structures. This technique can be used to fabricate "normally closed" microfluidic channels that are completely reversible, a feature that is challenging to achieve in conventional systems without careful engineering controls. The adjustable microfluidic channels are then applied to mechanically lyse single cells, and subsequently manipulate the released nuclear chromatin, creating new possibilities for epigenetic analysis of single cells. This simple, versatile, and robust technology provides an easily accessible pathway to construct adjustable microfluidic structures, which will be useful in developing complex assays and experiments even in resource-limited settings.
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Affiliation(s)
- Byoung Choul Kim
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
- Macromolecular Science and Engineering Center, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
| | - Christopher Moraes
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
| | - Jiexi Huang
- Department of Mechanical Engineering, College of Engineering, University of Michigan, 2350 Hayward St., Ann Arbor, MI 48109, USA
| | - Toshiki Matsuoka
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
| | - M.D. Thouless
- Department of Mechanical Engineering, College of Engineering, University of Michigan, 2350 Hayward St., Ann Arbor, MI 48109, USA
- Department of Materials Science & Engineering, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
| | - Shuichi Takayama
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
- Macromolecular Science and Engineering Center, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
- Division of Nano-Bio and Chemical Engineering WCU Project, UNIST, Ulsan, Republic of Korea
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Mahler GJ, Frendl CM, Cao Q, Butcher JT. Effects of shear stress pattern and magnitude on mesenchymal transformation and invasion of aortic valve endothelial cells. Biotechnol Bioeng 2014; 111:2326-37. [PMID: 24898772 DOI: 10.1002/bit.25291] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 04/18/2014] [Accepted: 05/07/2014] [Indexed: 01/23/2023]
Abstract
Understanding the role of mechanical forces on cell behavior is critical for tissue engineering, regenerative medicine, and disease initiation studies. Current hemodynamic bioreactors are largely limited to 2D substrates or the application of general flow conditions at a tissue level, which eliminates the investigation of some essential physiological and pathological responses. One example is the mesenchymal transformation of endothelial cells in response to shear stress. Endothelial to mesenchymal transformation (EndMT) is a valve morphogenic mechanism associated with aortic valve disease initiation. The aortic valve experiences oscillatory shear on the disease-susceptible fibrosa, and the role of hemodynamics on adult EndMT is unknown. The goal of this work was to develop and characterize a microfluidic bioreactor that applies physiologically relevant laminar or oscillatory shear stresses to endothelial cells and permits the quantitative analysis of 3D cell-extracellular matrix (ECM) interactions. In this study, porcine aortic valve endothelial cells were seeded onto 3D collagen I gels and exposed to different magnitudes of steady or oscillatory shear stress for 48 h. Cells elongated and aligned perpendicular to laminar, but not oscillatory shear. Low steady shear stress (2 dyne/cm(2) ) and oscillatory shear stress upregulated EndMT (ACTA2, Snail, TGFB1) and inflammation (ICAM1, NFKB1) related gene expression, EndMT-related (αSMA) protein expression, and matrix invasion when compared with static controls or cells exposed to high steady shear (10 and 20 dyne/cm(2) ). Our system enables direct testing of the role of shear stress on endothelial cell mesenchymal transformation in a dynamic, 3D environment and shows that hemodynamics regulate EndMT in adult valve endothelial cells.
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Affiliation(s)
- Gretchen J Mahler
- Department of Biomedical Engineering, Cornell University, Ithaca, New York; Department of Bioengineering, Binghamton University, Binghamton, New York
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Moraes C, Kim BC, Zhu X, Mills KL, Dixon AR, Thouless, Takayama S. Defined topologically-complex protein matrices to manipulate cell shape via three-dimensional fiber-like patterns. LAB ON A CHIP 2014; 14:2191-201. [PMID: 24632936 PMCID: PMC4041804 DOI: 10.1039/c4lc00122b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Culturing cells in three-dimensional (3D) environments has been shown to significantly influence cell function, and may provide a more physiologically relevant environment within which to study the behavior of specific cell types. 3D tissues typically present a topologically complex fibrous adhesive environment, which is technically challenging to replicate in a controlled manner. Micropatterning technologies have provided significant insights into cell-biomaterial interactions, and can be used to create fiber-like adhesive structures, but are typically limited to flat culture systems; the methods are difficult to apply to topologically-complex surfaces. In this work, we utilize crack formation in multilayered microfabricated materials under applied strain to rapidly generate well-controlled and topologically complex 'fiber-like' adhesive protein patterns, capable of supporting cell culture and controlling cell shape on three-dimensional patterns. We first demonstrate that the features of the generated adhesive environments such as width, spacing and topology can be controlled, and that these factors influence cell morphology. The patterning technique is then applied to examine the influence of fiber structure on the nuclear morphology and actin cytoskeletal structure of cells cultured in a nanofibrous biomaterial matrix.
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Affiliation(s)
- Christopher Moraes
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI 48109, USA
| | - Byoung Choul Kim
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI 48109, USA
- Macromolecular Science and Engineering Center, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
| | - Xiaoyue Zhu
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
| | - Kristen L. Mills
- Department of Mechanical Engineering, College of Engineering, University of Michigan, 2350 Hayward St., Ann Arbor, MI 48109, USA
| | - Angela R. Dixon
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
| | - Thouless
- Department of Mechanical Engineering, College of Engineering, University of Michigan, 2350 Hayward St., Ann Arbor, MI 48109, USA
- Department of Materials Science & Engineering, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
| | - Shuichi Takayama
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI 48109, USA
- Macromolecular Science and Engineering Center, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
- Department of Materials Science & Engineering, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
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A polymeric cell stretching device for real-time imaging with optical microscopy. Biomed Microdevices 2014; 15:1043-54. [PMID: 23868118 DOI: 10.1007/s10544-013-9796-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This paper reports the design, fabrication and characterization of a cell stretching device based on the side stretching approach. Numerical simulation using finite element method provides a guideline for optimizing the geometry and maximizing the output strain of the stretched membrane. An unique PDMS-based micro fabrication process was developed for obtaining high parallelization, well controlled membrane thickness and an ultra-thin bottom layer that is crucial for the use with confocal microscopes. The stretching experiments are fully automated with both device actuation and image acquisition. A programmable pneumatic control system was built for simultaneous driving of 24 stretching arrays. The actuation signals are synchronized with the image acquisition system to obtain time-lapse recording of cells grown on the stretched membrane. Experimental results verified the characteristics predicted by the simulation. A platform with 15 stretching units was integrated on a standard 24 mm × 50 mm glass slide. Each unit can achieve a maximum strain of more than 60 %. The platform was tested for cell growth under cyclic stretching. The preliminary results show that the device is compatible with all standard microscopes.
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Dixon AR, Moraes C, Csete ME, Thouless MD, Philbert MA, Takayama S. One-dimensional patterning of cells in silicone wells via compression-induced fracture. J Biomed Mater Res A 2014; 102:1361-9. [PMID: 23733484 PMCID: PMC3912204 DOI: 10.1002/jbm.a.34814] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 05/04/2013] [Accepted: 05/21/2013] [Indexed: 12/13/2022]
Abstract
We have adapted our existing compression-induced fracture technology to cell culture studies by generating linear patterns on a complex cell culture well structure rather than on simple solid constructs. We present a simple method to create one-dimensional (1D), submicron, and linear patterns of extracellular matrix on a multilayer silicone material. We identified critical design parameters necessary to optimize compression-induced fracture patterning on the wells, and applied stresses using compression Hoffman clamps. Finite-element analyses show that the incorporation of the well improves stress homogeneity (stress variation = 25%), and, thus, crack uniformity over the patterned region. Notably, a shallow well with a thick base (vs. deeper wells with thinner bases) reduces out-of-plane deflections by greater than a sixth in the cell culture region, improving clarity for optical imaging. The comparison of cellular and nuclear shape indices of a neuroblast line cultured on patterned 1D lines and unpatterned 2D surfaces reveals significant differences in cellular morphology, which could impact many cellular functions. Because 1D cell cultures recapitulate many important phenotypical traits of 3D cell cultures, our culture system offers a simple means to further study the relationship between 1D and 3D cell culture environments, without demanding expensive engineering techniques and expertise.
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Affiliation(s)
- Angela R. Dixon
- Toxicology Program, School of Public Health, University of Michigan, Ann Arbor, Michigan
- Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor Michigan
| | - Christopher Moraes
- Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor Michigan
| | - Marie E. Csete
- Departments of Anesthesiology and Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, Michigan (Current affiliation: AABB Center for Cellular Therapies, Bethesda, Maryland)
| | - M. D. Thouless
- Departments of Mechanical Engineering and Materials Science & Engineering, College of Engineering, University of Michigan, Ann Arbor, Michigan
| | - Martin A. Philbert
- Toxicology Program, School of Public Health, University of Michigan, Ann Arbor, Michigan
| | - Shuichi Takayama
- Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor Michigan
- Macromolecular Science and Engineering Program, College of Engineering, University of Michigan, Ann Arbor, Michigan
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Moraes C, Labuz JM, Leung BM, Inoue M, Chun TH, Takayama S. On being the right size: scaling effects in designing a human-on-a-chip. Integr Biol (Camb) 2014; 5:1149-61. [PMID: 23925524 DOI: 10.1039/c3ib40040a] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Developing a human-on-a-chip by connecting multiple model organ systems would provide an intermediate screen for therapeutic efficacy and toxic side effects of drugs prior to conducting expensive clinical trials. However, correctly designing individual organs and scaling them relative to each other to make a functional microscale human analog is challenging, and a generalized approach has yet to be identified. In this work, we demonstrate the importance of rational design of both the individual organ and its relationship with other organs, using a simple two-compartment system simulating insulin-dependent glucose uptake in adipose tissues. We demonstrate that inter-organ scaling laws depend on both the number of cells and the spatial arrangement of those cells within the microfabricated construct. We then propose a simple and novel inter-organ 'metabolically supported functional scaling' approach predicated on maintaining in vivo cellular basal metabolic rates by limiting resources available to cells on the chip. This approach leverages findings from allometric scaling models in mammals that limited resources in vivo prompt cells to behave differently than in resource-rich in vitro cultures. Although applying scaling laws directly to tissues can result in systems that would be quite challenging to implement, engineering workarounds may be used to circumvent these scaling issues. Specific workarounds discussed include the limited oxygen carrying capacity of cell culture media when used as a blood substitute and the ability to engineer non-physiological structures to augment organ function, to create the transport-accessible, yet resource-limited environment necessary for cells to mimic in vivo functionality. Furthermore, designing the structure of individual tissues in each organ compartment may be a useful strategy to bypass scaling concerns at the inter-organ level.
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Affiliation(s)
- Christopher Moraes
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
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Kreutzer J, Ikonen L, Hirvonen J, Pekkanen-Mattila M, Aalto-Setälä K, Kallio P. Pneumatic cell stretching system for cardiac differentiation and culture. Med Eng Phys 2014; 36:496-501. [DOI: 10.1016/j.medengphy.2013.09.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 09/19/2013] [Accepted: 09/22/2013] [Indexed: 01/17/2023]
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Seo BR, DelNero P, Fischbach C. In vitro models of tumor vessels and matrix: engineering approaches to investigate transport limitations and drug delivery in cancer. Adv Drug Deliv Rev 2014; 69-70:205-216. [PMID: 24309015 DOI: 10.1016/j.addr.2013.11.011] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 11/14/2013] [Accepted: 11/24/2013] [Indexed: 12/12/2022]
Abstract
Tumor-stroma interactions have emerged as critical determinants of drug efficacy. However, the underlying biological and physicochemical mechanisms by which the microenvironment regulates therapeutic response remain unclear, due in part to a lack of physiologically relevant in vitro platforms to accurately interrogate tissue-level phenomena. Tissue-engineered tumor models are beginning to address this shortcoming. By allowing selective incorporation of microenvironmental complexity, these platforms afford unique access to tumor-associated signaling and transport dynamics. This review will focus on engineering approaches to study drug delivery as a function of tumor-associated changes of the vasculature and extracellular matrix (ECM). First, we review current biological understanding of these components and discuss their impact on transport processes. Then, we evaluate existing microfluidic, tissue engineering, and materials science strategies to recapitulate vascular and ECM characteristics of tumors, and finish by outlining challenges and future directions of the field that may ultimately improve anti-cancer therapies.
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Kim BC, Moraes C, Huang J, Thouless M, Takayama S. Fracture-based micro- and nanofabrication for biological applications. Biomater Sci 2014; 2:288-296. [PMID: 24707353 PMCID: PMC3972810 DOI: 10.1039/c3bm60276a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
While fracture is generally considered to be undesirable in various manufacturing processes, delicate control of fracture can be successfully implemented to generate structures at micro/nano length scales. Fracture-based fabrication techniques can serve as a template-free manufacturing method, and enables highly-ordered patterns or fluidic channels to be formed over large areas in a simple and cost-effective manner. Such technologies can be leveraged to address biologically-relevant problems, such as in the analysis of biomolecules or in the design of culture systems that imitate the cellular or molecular environment. This mini review provides an overview of current fracture-guided fabrication techniques and their biological applications. We first survey the mechanical principles of fracture-based approaches. Then we describe biological applications at the cellular and molecular levels. Finally, we discuss unique advantages of the different system for biological studies.
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Affiliation(s)
- Byoung Choul Kim
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
- Macromolecular Science and Engineering Center, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
| | - Christopher Moraes
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
| | - Jiexi Huang
- Department of Mechanical Engineering, College of Engineering, University of Michigan, 2350 Hayward St., Ann Arbor, MI 48109, USA
| | - M.D. Thouless
- Department of Mechanical Engineering, College of Engineering, University of Michigan, 2350 Hayward St., Ann Arbor, MI 48109, USA
- Department of Materials Science & Engineering, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
| | - Shuichi Takayama
- Department of Biomedical Engineering, College of Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA
- Macromolecular Science and Engineering Center, College of Engineering, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109, USA
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