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Qiao E, Baek J, Fulmore C, Song M, Kim TS, Kumar S, Schaffer DV. Spectrin mediates 3D-specific matrix stress-relaxation response in neural stem cell lineage commitment. SCIENCE ADVANCES 2024; 10:eadk8232. [PMID: 39093963 PMCID: PMC11296331 DOI: 10.1126/sciadv.adk8232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 06/27/2024] [Indexed: 08/04/2024]
Abstract
While extracellular matrix (ECM) stress relaxation is increasingly appreciated to regulate stem cell fate commitment and other behaviors, much remains unknown about how cells process stress-relaxation cues in tissue-like three-dimensional (3D) geometries versus traditional 2D cell culture. Here, we develop an oligonucleotide-crosslinked hyaluronic acid-based ECM platform with tunable stress relaxation properties capable of use in either 2D or 3D. Strikingly, stress relaxation favors neural stem cell (NSC) neurogenesis in 3D but suppresses it in 2D. RNA sequencing and functional studies implicate the membrane-associated protein spectrin as a key 3D-specific transducer of stress-relaxation cues. Confining stress drives spectrin's recruitment to the F-actin cytoskeleton, where it mechanically reinforces the cortex and potentiates mechanotransductive signaling. Increased spectrin expression is also accompanied by increased expression of the transcription factor EGR1, which we previously showed mediates NSC stiffness-dependent lineage commitment in 3D. Our work highlights spectrin as an important molecular sensor and transducer of 3D stress-relaxation cues.
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Affiliation(s)
- Eric Qiao
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Jieung Baek
- Department of Bioengineering, University of California, Berkeley, Berkeley, CA 94720, USA
- Department of Mechanical and Biomedical Engineering, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Camille Fulmore
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Myoung Song
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Taek-Soo Kim
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Sanjay Kumar
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA 94720, USA
- Department of Bioengineering, University of California, Berkeley, Berkeley, CA 94720, USA
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94143, USA
| | - David V. Schaffer
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA 94720, USA
- Department of Bioengineering, University of California, Berkeley, Berkeley, CA 94720, USA
- Helen Wills Neuroscience Institute, Berkeley, CA 94720, USA
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2
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Wang J, Zhang B, Chen X, Xin Y, Li K, Zhang C, Tang K, Tan Y. Cell mechanics regulate the migration and invasion of hepatocellular carcinoma cells via JNK signaling. Acta Biomater 2024; 176:321-333. [PMID: 38272199 DOI: 10.1016/j.actbio.2024.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 01/10/2024] [Accepted: 01/17/2024] [Indexed: 01/27/2024]
Abstract
Hepatocellular carcinoma (HCC) cells, especially those with metastatic competence, show reduced stiffness compared to the non-malignant counterparts. However, it is still unclear whether and how the mechanics of HCC cells influence their migration and invasion. This study reports that HCC cells with enhanced motility show reduced mechanical stiffness and cytoskeleton, suggesting the inverse correlation between cellular stiffness and motility. Through pharmacologic and genetic approaches, inhibiting actomyosin activity reduces HCC cellular stiffness but promotes their migration and invasion, while activating it increases cell stiffness but impairs cell motility. Actomyosin regulates cell motility through the influence on cellular stiffness. Mechanistically, weakening/strengthening cells inhibits/promotes c-Jun N terminal kinase (JNK) phosphorylation, activation/inhibition of which rescues the effects of cell mechanics on their migration and invasion. Further, HCC cancer stem cells (CSCs) exhibit higher motility but lower stiffness than control cells. Increasing CSC stiffness weakens migration and invasion through the activation of JNK signaling. In conclusion, our findings unveil a new regulatory role of actomyosin-mediated cellular mechanics in tumor cell motility and present new evidence to support that tumor cell softening may be one driving force for HCC metastasis. STATEMENT OF SIGNIFICANCE: Tumor cells progressively become softened during metastasis and low cell stiffness is associated with high metastatic potential. However, it remains unclear whether tumor cell softening is a by-product of or a driving force for tumor progression. This work reports that the stiffness of hepatocellular carcinoma cells is linked to their migration and invasion. Importantly, tumor cell softening promotes migration and invasion, while cell stiffening impairs the mobility. Weakening/strengthening cells inhibits/promotes JNK phosphorylation, activation/inhibition of which rescues the effects of cell mechanics on their migration and invasion ability. Further, stiffening liver cancer stem cells attenuates their motility through activating JNK signaling. In summary, our study uncovers a previously unappreciated role of tumor cell mechanics in migration and invasion and implicates the therapeutic potential of cell mechanics in the mechanotargeting of metastasis.
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Affiliation(s)
- Junfan Wang
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China; Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Bai Zhang
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China; Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Xi Chen
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China; Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Ying Xin
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China; Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Keming Li
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China; Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Cunyu Zhang
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China; Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Kai Tang
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China; Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Youhua Tan
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China; Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China.
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3
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Atashgar F, Shafieian M, Abolfathi N. The effect of the properties of cell nucleus and underlying substrate on the response of finite element models of astrocytes undergoing mechanical stimulations. Comput Methods Biomech Biomed Engin 2023; 26:1572-1581. [PMID: 36324266 DOI: 10.1080/10255842.2022.2128673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/23/2022] [Accepted: 09/21/2022] [Indexed: 11/06/2022]
Abstract
Astrocyte cells play a critical role in the mechanical behaviour of the brain tissue; hence understanding the properties of Astrocytes is a big step toward understanding brain diseases and abnormalities. Conventionally, atomic force microscopy (AFM) has been used as one of the most powerful tools to characterize the mechanical properties of cells. However, due to the complexities of experimental work and the complex behaviour of living cells, the finite element method (FEM) is commonly used to estimate the cells' response to mechanical stimulations. In this study, we developed a finite element model of the Astrocyte cells to investigate the effect of two key parameters that could affect the response of the cell to mechanical loading; the properties of the underlying substrate and the nucleus. In this regard, the cells were placed on two different substrates in terms of thickness and stiffness (gel and glass) with varying properties of the nucleus. The main achievement of this study was to develop an insight to investigate the response of the Astrocytes to mechanical loading for future studies, both experimentally and computationally.
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Affiliation(s)
- Fatemeh Atashgar
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Mehdi Shafieian
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Nabiollah Abolfathi
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
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4
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Siddiquie RY, Sharma K, Banerjee A, Agrawal A, Joshi SS. Time-dependent plastic behavior of bacteria leading to rupture. J Mech Behav Biomed Mater 2023; 145:106048. [PMID: 37523842 DOI: 10.1016/j.jmbbm.2023.106048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/25/2023] [Accepted: 07/26/2023] [Indexed: 08/02/2023]
Abstract
A study of the mechanical response of bacteria is essential in designing an antibacterial surface for implants and food packaging applications. This research evaluated the mechanical response of Escherichia coli under different loading conditions. Indentation and prolonged creep tests were performed to understand their viscoelastic-plastic response. The results indicate that varying loading rates from 1 μm/s to 5 μm/s show an increase in modulus of 182% and 90%, calculated in the loading and unloading cycles, respectively, and a decrease in adhesion force by 42%. However, on varying loads from 5 nN to 25 nN, nominal change is observed in both modulus and adhesion force. The rupture curve at 100 nN load shows elastic and a small plastic deformation accompanied by a sharp peak indicating the cell wall rupture. The rupture force at the peak was found to be 34.38 ± 5.15 nN, irrespective of the loading rate, making it a failure criterion for bacteria rupture. The creep response of bacteria increases (for 6 s) and then remains constant (for 15 s) with time, indicating that a standard linear solid (SLS) model applies to this behavior. This work attempts to evaluate the mechanical properties of E. coli bacteria focusing on its rupture by contact killing mechanism.
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Affiliation(s)
- Reshma Y Siddiquie
- Department of Mechanical Engineering, Indian Institute of Technology, Bombay, India
| | - Kuldeep Sharma
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Bombay, India
| | - Anirban Banerjee
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Bombay, India
| | - Amit Agrawal
- Department of Mechanical Engineering, Indian Institute of Technology, Bombay, India
| | - Suhas S Joshi
- Department of Mechanical Engineering, Indian Institute of Technology, Bombay, India; Department of Mechanical Engineering, Indian Institute of Technology, Indore, India.
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5
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Zhu Y, Zhang M, Sun Q, Wang X, Li X, Li Q. Advanced Mechanical Testing Technologies at the Cellular Level: The Mechanisms and Application in Tissue Engineering. Polymers (Basel) 2023; 15:3255. [PMID: 37571149 PMCID: PMC10422338 DOI: 10.3390/polym15153255] [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: 07/11/2023] [Revised: 07/24/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
Mechanics, as a key physical factor which affects cell function and tissue regeneration, is attracting the attention of researchers in the fields of biomaterials, biomechanics, and tissue engineering. The macroscopic mechanical properties of tissue engineering scaffolds have been studied and optimized based on different applications. However, the mechanical properties of the overall scaffold materials are not enough to reveal the mechanical mechanism of the cell-matrix interaction. Hence, the mechanical detection of cell mechanics and cellular-scale microenvironments has become crucial for unraveling the mechanisms which underly cell activities and which are affected by physical factors. This review mainly focuses on the advanced technologies and applications of cell-scale mechanical detection. It summarizes the techniques used in micromechanical performance analysis, including atomic force microscope (AFM), optical tweezer (OT), magnetic tweezer (MT), and traction force microscope (TFM), and analyzes their testing mechanisms. In addition, the application of mechanical testing techniques to cell mechanics and tissue engineering scaffolds, such as hydrogels and porous scaffolds, is summarized and discussed. Finally, it highlights the challenges and prospects of this field. This review is believed to provide valuable insights into micromechanics in tissue engineering.
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Affiliation(s)
- Yingxuan Zhu
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
- National Center for International Joint Research of Micro-nano Moulding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Mengqi Zhang
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
- National Center for International Joint Research of Micro-nano Moulding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Qingqing Sun
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Xiaofeng Wang
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
- National Center for International Joint Research of Micro-nano Moulding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Xiaomeng Li
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
- National Center for International Joint Research of Micro-nano Moulding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Qian Li
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
- National Center for International Joint Research of Micro-nano Moulding Technology, Zhengzhou University, Zhengzhou 450001, China
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6
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Alatoom A, ElGindi M, Sapudom J, Teo JCM. The T Cell Journey: A Tour de Force. Adv Biol (Weinh) 2023; 7:e2200173. [PMID: 36190140 DOI: 10.1002/adbi.202200173] [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: 06/24/2022] [Revised: 08/30/2022] [Indexed: 11/07/2022]
Abstract
T cells act as the puppeteers in the adaptive immune response, and their dysfunction leads to the initiation and progression of pathological conditions. During their lifetime, T cells experience myriad forces that modulate their effector functions. These forces are imposed by interacting cells, surrounding tissues, and shear forces from fluid movement. In this review, a journey with T cells is made, from their development to their unique characteristics, including the early studies that uncovered their mechanosensitivity. Then the studies pertaining to the responses of T cell activation to changes in antigen-presenting cells' physical properties, to their immediate surrounding extracellular matrix microenvironment, and flow conditions are highlighted. In addition, it is explored how pathological conditions like the tumor microenvironment can hinder T cells and allow cancer cells to escape elimination.
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Affiliation(s)
- Aseel Alatoom
- Laboratory for Immuno Bioengineering Research and Applications Division of Engineering, New York University Abu Dhabi, Saadiyat Campus, P.O. Box 127788, Abu Dhabi, UAE.,Department of Mechanical Engineering Tandon School of Engineering, New York University, 6 MetroTech Center, Brooklyn, NY, 11201, USA
| | - Mei ElGindi
- Laboratory for Immuno Bioengineering Research and Applications Division of Engineering, New York University Abu Dhabi, Saadiyat Campus, P.O. Box 127788, Abu Dhabi, UAE
| | - Jiranuwat Sapudom
- Laboratory for Immuno Bioengineering Research and Applications Division of Engineering, New York University Abu Dhabi, Saadiyat Campus, P.O. Box 127788, Abu Dhabi, UAE
| | - Jeremy C M Teo
- Laboratory for Immuno Bioengineering Research and Applications Division of Engineering, New York University Abu Dhabi, Saadiyat Campus, P.O. Box 127788, Abu Dhabi, UAE.,Department of Mechanical Engineering Tandon School of Engineering, New York University, 6 MetroTech Center, Brooklyn, NY, 11201, USA.,Department of Biomedical Engineering Tandon School of Engineering, New York University, 6 MetroTech Center, Brooklyn, NY, 11201, USA
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7
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Viscoelastic Properties in Cancer: From Cells to Spheroids. Cells 2021; 10:cells10071704. [PMID: 34359874 PMCID: PMC8304080 DOI: 10.3390/cells10071704] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 06/28/2021] [Accepted: 06/30/2021] [Indexed: 12/24/2022] Open
Abstract
AFM-based rheology methods enable the investigation of the viscoelastic properties of cancer cells. Such properties are known to be essential for cell functions, especially for malignant cells. Here, the relevance of the force modulation method was investigated to characterize the viscoelasticity of bladder cancer cells of various invasiveness on soft substrates, revealing that the rheology parameters are a signature of malignancy. Furthermore, the collagen microenvironment affects the viscoelastic moduli of cancer cell spheroids; thus, collagen serves as a powerful proxy, leading to an increase of the dynamic moduli vs. frequency, as predicted by a double power law model. Taken together, these results shed new light on how cancer cells and tissues adapt their viscoelastic properties depending on their malignancy and the microenvironment. This method could be an attractive way to control their properties in the future, based on the similarity of spheroids with in vivo tumor models.
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8
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Soheilmoghaddam F, Rumble M, Cooper-White J. High-Throughput Routes to Biomaterials Discovery. Chem Rev 2021; 121:10792-10864. [PMID: 34213880 DOI: 10.1021/acs.chemrev.0c01026] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Many existing clinical treatments are limited in their ability to completely restore decreased or lost tissue and organ function, an unenviable situation only further exacerbated by a globally aging population. As a result, the demand for new medical interventions has increased substantially over the past 20 years, with the burgeoning fields of gene therapy, tissue engineering, and regenerative medicine showing promise to offer solutions for full repair or replacement of damaged or aging tissues. Success in these fields, however, inherently relies on biomaterials that are engendered with the ability to provide the necessary biological cues mimicking native extracellular matrixes that support cell fate. Accelerating the development of such "directive" biomaterials requires a shift in current design practices toward those that enable rapid synthesis and characterization of polymeric materials and the coupling of these processes with techniques that enable similarly rapid quantification and optimization of the interactions between these new material systems and target cells and tissues. This manuscript reviews recent advances in combinatorial and high-throughput (HT) technologies applied to polymeric biomaterial synthesis, fabrication, and chemical, physical, and biological screening with targeted end-point applications in the fields of gene therapy, tissue engineering, and regenerative medicine. Limitations of, and future opportunities for, the further application of these research tools and methodologies are also discussed.
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Affiliation(s)
- Farhad Soheilmoghaddam
- Tissue Engineering and Microfluidics Laboratory (TEaM), Australian Institute for Bioengineering and Nanotechnology (AIBN), University Of Queensland, St. Lucia, Queensland, Australia 4072.,School of Chemical Engineering, University Of Queensland, St. Lucia, Queensland, Australia 4072
| | - Madeleine Rumble
- Tissue Engineering and Microfluidics Laboratory (TEaM), Australian Institute for Bioengineering and Nanotechnology (AIBN), University Of Queensland, St. Lucia, Queensland, Australia 4072.,School of Chemical Engineering, University Of Queensland, St. Lucia, Queensland, Australia 4072
| | - Justin Cooper-White
- Tissue Engineering and Microfluidics Laboratory (TEaM), Australian Institute for Bioengineering and Nanotechnology (AIBN), University Of Queensland, St. Lucia, Queensland, Australia 4072.,School of Chemical Engineering, University Of Queensland, St. Lucia, Queensland, Australia 4072
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Bose S, Dasbiswas K, Gopinath A. Matrix Stiffness Modulates Mechanical Interactions and Promotes Contact between Motile Cells. Biomedicines 2021; 9:biomedicines9040428. [PMID: 33920918 PMCID: PMC8077938 DOI: 10.3390/biomedicines9040428] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/08/2021] [Accepted: 04/10/2021] [Indexed: 02/07/2023] Open
Abstract
The mechanical micro-environment of cells and tissues influences key aspects of cell structure and function, including cell motility. For proper tissue development, cells need to migrate, interact, and form contacts. Cells are known to exert contractile forces on underlying soft substrates and sense deformations in them. Here, we propose and analyze a minimal biophysical model for cell migration and long-range cell–cell interactions through mutual mechanical deformations of the substrate. We compute key metrics of cell motile behavior, such as the number of cell-cell contacts over a given time, the dispersion of cell trajectories, and the probability of permanent cell contact, and analyze how these depend on a cell motility parameter and substrate stiffness. Our results elucidate how cells may sense each other mechanically and generate coordinated movements and provide an extensible framework to further address both mechanical and short-range biophysical interactions.
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Affiliation(s)
- Subhaya Bose
- Department of Physics, University of California Merced, Merced, CA 95343, USA; (S.B.); (K.D.)
| | - Kinjal Dasbiswas
- Department of Physics, University of California Merced, Merced, CA 95343, USA; (S.B.); (K.D.)
| | - Arvind Gopinath
- Department of Bioengineering, University of California Merced, Merced, CA 95343, USA
- Correspondence:
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10
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Tang X, Liu X, Li P, Liu D, Kojima M, Huang Q, Arai T. Efficient Single-Cell Mechanical Measurement by Integrating a Cell Arraying Microfluidic Device With Magnetic Tweezer. IEEE Robot Autom Lett 2021. [DOI: 10.1109/lra.2021.3062793] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Cell Cytoskeleton and Stiffness Are Mechanical Indicators of Organotropism in Breast Cancer. BIOLOGY 2021; 10:biology10040259. [PMID: 33805866 PMCID: PMC8064360 DOI: 10.3390/biology10040259] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/05/2021] [Accepted: 03/06/2021] [Indexed: 12/23/2022]
Abstract
Simple Summary Cancer cell dissemination exhibits organ preference or organotropism. Although the influence of intrinsic biochemical factors on organotropism has been intensely studied, little is known about the roles of mechanical properties of metastatic cancer cells. Our study suggests that there may be a correlation between cell cytoskeleton/stiffness and organotropism. We find that the cytoskeleton and stiffness of breast cancer cell subpopulations with different metastatic preference match the mechanics of the metastasized organs. The modification of cell cytoskeleton significantly influences the organotropism-related gene expression pattern and mechanoresponses on soft substrates which mimic brain tissue stiffness. These findings highlight the key role of cell cytoskeleton in specific organ metastasis, which may not only reflect but also impact the metastatic organ preference. Abstract Tumor metastasis involves the dissemination of tumor cells from the primary lesion to other organs and the subsequent formation of secondary tumors, which leads to the majority of cancer-related deaths. Clinical findings show that cancer cell dissemination is not random but exhibits organ preference or organotropism. While intrinsic biochemical factors of cancer cells have been extensively studied in organotropism, much less is known about the role of cell cytoskeleton and mechanics. Herein, we demonstrate that cell cytoskeleton and mechanics are correlated with organotropism. The result of cell stiffness measurements shows that breast cancer cells with bone tropism are much stiffer with enhanced F-actin, while tumor cells with brain tropism are softer with lower F-actin than their parental cells. The difference in cellular stiffness matches the difference in the rigidity of their metastasized organs. Further, disrupting the cytoskeleton of breast cancer cells with bone tropism not only elevates the expressions of brain metastasis-related genes but also increases cell spreading and proliferation on soft substrates mimicking the stiffness of brain tissue. Stabilizing the cytoskeleton of cancer cells with brain tropism upregulates bone metastasis-related genes while reduces the mechanoadaptation ability on soft substrates. Taken together, these findings demonstrate that cell cytoskeleton and biophysical properties of breast cancer subpopulations correlate with their metastatic preference in terms of gene expression pattern and mechanoadaptation ability, implying the potential role of cell cytoskeleton in organotropism.
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12
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Barai A, Das A, Sen S. Measuring microenvironment-tuned nuclear stiffness of cancer cells with atomic force microscopy. STAR Protoc 2021; 2:100296. [PMID: 33532741 PMCID: PMC7829340 DOI: 10.1016/j.xpro.2021.100296] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Quantification of nuclear stiffness is challenging for cells encapsulated within a 3D extracellular matrix (ECM). Here, we describe an experimental setup for measuring microenvironment-dependent tuning of nuclear stiffness using an atomic force microscope (AFM). In our setup, ECM-coated polyacrylamide hydrogels mimic the stiffness of the microenvironment, enabling the measurement of nuclear stiffness using an AFM probe in live cancer cells. For complete details on the use and execution of this protocol, please refer to Das et al. (2019) (https://doi.org/10.1016/j.matbio.2019.01.001).
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Affiliation(s)
- Amlan Barai
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Alakesh Das
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Shamik Sen
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
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13
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Garcia R. Nanomechanical mapping of soft materials with the atomic force microscope: methods, theory and applications. Chem Soc Rev 2020; 49:5850-5884. [PMID: 32662499 DOI: 10.1039/d0cs00318b] [Citation(s) in RCA: 161] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Fast, high-resolution, non-destructive and quantitative characterization methods are needed to develop materials with tailored properties at the nanoscale or to understand the relationship between mechanical properties and cell physiology. This review introduces the state-of-the-art force microscope-based methods to map at high-spatial resolution the elastic and viscoelastic properties of soft materials. The experimental methods are explained in terms of the theories that enable the transformation of observables into material properties. Several applications in materials science, molecular biology and mechanobiology illustrate the scope, impact and potential of nanomechanical mapping methods.
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Affiliation(s)
- Ricardo Garcia
- Instituto de Ciencia de Materiales de Madrid, CSIC, c/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
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14
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Abstract
Brain tumors' severity ranges from benign to highly aggressive and invasive. Bioengineering tools can assist in understanding the pathophysiology of these tumors from outside the body and facilitate development of suitable antitumoral treatments. Here, we first describe the physiology and cellular composition of brain tumors. Then, we discuss the development of three-dimensional tissue models utilizing brain tumor cells. In particular, we highlight the role of hydrogels in providing a biomimetic support for the cells to grow into defined structures. Microscale technologies, such as electrospinning and bioprinting, and advanced cellular models aim to mimic the extracellular matrix and natural cellular localization in engineered tumor tissues. Lastly, we review current applications and prospects of hydrogels for therapeutic purposes, such as drug delivery and co-administration with other therapies. Through further development, hydrogels can serve as a reliable option for in vitro modeling and treatment of brain tumors for translational medicine.
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15
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Abstract
Physical stimuli are essential for the function of eukaryotic cells, and changes in physical signals are important elements in normal tissue development as well as in disease initiation and progression. The complexity of physical stimuli and the cellular signals they initiate are as complex as those triggered by chemical signals. One of the most important, and the focus of this review, is the effect of substrate mechanical properties on cell structure and function. The past decade has produced a nearly exponentially increasing number of mechanobiological studies to define how substrate stiffness alters cell biology using both purified systems and intact tissues. Here we attempt to identify common features of mechanosensing in different systems while also highlighting the numerous informative exceptions to what in early studies appeared to be simple rules by which cells respond to mechanical stresses.
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Affiliation(s)
- Paul A Janmey
- Department of Physiology, Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Bioengineering, University of California-Berkeley, Berkeley, California; and Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
| | - Daniel A Fletcher
- Department of Physiology, Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Bioengineering, University of California-Berkeley, Berkeley, California; and Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
| | - Cynthia A Reinhart-King
- Department of Physiology, Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Bioengineering, University of California-Berkeley, Berkeley, California; and Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
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16
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Tang G, Galluzzi M, Zhang B, Shen YL, Stadler FJ. Biomechanical Heterogeneity of Living Cells: Comparison between Atomic Force Microscopy and Finite Element Simulation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7578-7587. [PMID: 30272980 DOI: 10.1021/acs.langmuir.8b02211] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Atomic force microscopy (AFM) indentation is a popular method for characterizing the micromechanical properties of soft materials such as living cells. However, the mechanical data obtained from deep indentation measurements can be difficult and problematic to interpret as a result of the complex geometry of a cell, the nonlinearity of indentation contact, and constitutive relations of heterogeneous hyperelastic soft components. Living MDA-MB-231 cells were indented by spherical probes to obtain morphological and mechanical data that were adopted to build an accurate finite element model (FEM) for a parametric study. Initially, a 2D-axisymmetric numerical model was constructed with the main purpose of understanding the effect of geometrical and mechanical properties of constitutive parts such as the cell body, nucleus, and lamellipodium. A series of FEM deformation fields were directly compared with atomic force spectroscopy in order to resolve the mechanical convolution of heterogeneous parts and quantify Young's modulus and the geometry of nuclei. Furthermore, a 3D finite element model was constructed to investigate indentation events located far from the axisymmetric geometry. In this framework, the joint FEM/AFM approach has provided a useful methodology and a comprehensive characterization of the heterogeneous structure of living cells, emphasizing the deconvolution of geometrical structure and the true elastic modulus of the cell nucleus.
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Affiliation(s)
- Guanlin Tang
- College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials , Shenzhen University , Shenzhen 518055 , PR China
| | - Massimiliano Galluzzi
- College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials , Shenzhen University , Shenzhen 518055 , PR China
- Shenzhen Key Laboratory of Nanobiomechanics , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , Guangdong , China
- CIMAINA and Dipartimento di Fisica , Università degli Studi di Milano , via Celoria 16 , 20133 Milano , Italy
| | - Bokai Zhang
- Shenzhen Key Laboratory of Nanobiomechanics , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , Guangdong , China
| | - Yu-Lin Shen
- Department of Mechanical Engineering , University of New Mexico , Albuquerque , New Mexico 87131 , United States
| | - Florian J Stadler
- College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials , Shenzhen University , Shenzhen 518055 , PR China
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17
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Liu Y, Cui M, Huang J, Sun M, Zhao X, Zhao Q. Robotic Micropipette Aspiration for Multiple Cells. MICROMACHINES 2019; 10:E348. [PMID: 31137867 PMCID: PMC6562722 DOI: 10.3390/mi10050348] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 05/23/2019] [Accepted: 05/24/2019] [Indexed: 12/03/2022]
Abstract
As there are significant variations of cell elasticity among individual cells, measuring the elasticity of batch cells is required for obtaining statistical results of cell elasticity. At present, the micropipette aspiration (MA) technique is the most widely used cell elasticity measurement method. Due to a lack of effective cell storage and delivery methods, the existing manual and robotic MA methods are only capable of measuring a single cell at a time, making the MA of batch cells low efficiency. To address this problem, we developed a robotic MA system capable of storing multiple cells with a feeder micropipette (FM), picking up cells one-by-one to measure their elasticity with a measurement micropipette (MM). This system involved the following key techniques: Maximum permissible tilt angle of MM and FM determination, automated cell adhesion detection and cell adhesion break, and automated cell aspiration. The experimental results demonstrated that our system was able to continuously measure more than 20 cells with a manipulation speed quadrupled in comparison to existing methods. With the batch cell measurement ability, cell elasticity of pig ovum cultured in different environmental conditions was measured to find optimized culturing protocols for oocyte maturation.
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Affiliation(s)
- Yaowei Liu
- Institute of Robotics and Automatic Information System and the Tianjin Key Laboratory of Intelligent Robotics, Nankai University, Tianjin 300071, China.
| | - Maosheng Cui
- Institute of Animal Sciences, Tianjin 300112, China.
| | | | - Mingzhu Sun
- Institute of Robotics and Automatic Information System and the Tianjin Key Laboratory of Intelligent Robotics, Nankai University, Tianjin 300071, China.
| | - Xin Zhao
- Institute of Robotics and Automatic Information System and the Tianjin Key Laboratory of Intelligent Robotics, Nankai University, Tianjin 300071, China.
| | - Qili Zhao
- Institute of Robotics and Automatic Information System and the Tianjin Key Laboratory of Intelligent Robotics, Nankai University, Tianjin 300071, China.
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18
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Galluzzi M, Schulte C, Milani P, Podestà A. Imidazolium-Based Ionic Liquids Affect Morphology and Rigidity of Living Cells: An Atomic Force Microscopy Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12452-12462. [PMID: 30213187 DOI: 10.1021/acs.langmuir.8b01554] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The study of the toxicity, biocompatibility, and environmental sustainability of room-temperature ionic liquids (ILs) is still in its infancy. Understanding the impact of ILs on living organisms, especially from the aquatic ecosystem, is urgent, since large amounts of these substances are starting to be employed as solvents in industrial chemical processes, and on the other side, evidence of toxic effects of ILs on microorganisms and single cells have been observed. To date, the toxicity of ILs has been investigated by means of macroscopic assays aimed at characterizing the effective concentrations (like the EC50) that cause the death of a significant fraction of the population of microorganisms and cells. These studies allow us to identify the cell membrane as the first target of the IL interaction, whose effectiveness was correlated to the lipophilicity of the cation, i.e., to the length of the lateral alkyl chain. Our study aimed at investigating the molecular mechanisms underpinning the interaction of ILs with living cells. To this purpose, we carried out a combined topographic and mechanical analysis by atomic force microscopy of living breast metastatic cancer cells (MDA-MB-231) upon interaction with imidazolium-based ILs. We showed that ILs are able to induce modifications of the overall rigidity (effective Young's modulus) and morphology of the cells. Our results demonstrate that ILs act on the physical properties of the outer cell layer (the membrane linked to the actin cytoskeleton), already at concentrations below the EC50. These potentially toxic effects are stronger at higher IL concentrations, as well as with longer lateral chains in the cation.
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Affiliation(s)
- Massimiliano Galluzzi
- Shenzhen Key Laboratory of Nanobiomechanics , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , Guangdong , China
- C.I.Ma.I.Na and Dipartimento di Fisica "Aldo Pontremoli" , Università degli Studi di Milano , via Celoria 16 , 20133 Milano , Italy
| | - Carsten Schulte
- C.I.Ma.I.Na and Dipartimento di Fisica "Aldo Pontremoli" , Università degli Studi di Milano , via Celoria 16 , 20133 Milano , Italy
| | - Paolo Milani
- C.I.Ma.I.Na and Dipartimento di Fisica "Aldo Pontremoli" , Università degli Studi di Milano , via Celoria 16 , 20133 Milano , Italy
| | - Alessandro Podestà
- C.I.Ma.I.Na and Dipartimento di Fisica "Aldo Pontremoli" , Università degli Studi di Milano , via Celoria 16 , 20133 Milano , Italy
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19
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Oyama H, Takahashi K, Tanaka Y, Takemoto H, Haga H. Long-term Culture of Human iPS Cell-derived Telencephalic Neuron Aggregates on Collagen Gel. Cell Struct Funct 2018; 43:85-94. [PMID: 29780042 DOI: 10.1247/csf.18002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
It takes several months to form the 3-dimensional morphology of the human embryonic brain. Therefore, establishing a long-term culture method for neuronal tissues derived from human induced pluripotent stem (iPS) cells is very important for studying human brain development. However, it is difficult to keep primary neurons alive for more than 3 weeks in culture. Moreover, long-term adherent culture to maintain the morphology of telencephalic neuron aggregates induced from human iPS cells is also difficult. Although collagen gel has been widely used to support long-term culture of cells, it is not clear whether human iPS cell-derived neuron aggregates can be cultured for long periods on this substrate. In the present study, we differentiated human iPS cells to telencephalic neuron aggregates and examined long-term culture of these aggregates on collagen gel. The results indicated that these aggregates could be cultured for over 3 months by adhering tightly onto collagen gel. Furthermore, telencephalic neuronal precursors within these aggregates matured over time and formed layered structures. Thus, long-term culture of telencephalic neuron aggregates derived from human iPS cells on collagen gel would be useful for studying human cerebral cortex development.Key words: Induced pluripotent stem cell, forebrain neuron, collagen gel, long-term culture.
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Affiliation(s)
- Hiroshi Oyama
- Shionogi Innovation Center for Drug Discovery, Shionogi & Co. Ltd.,Graduate School of Life Science, Hokkaido University
| | - Koji Takahashi
- Shionogi Innovation Center for Drug Discovery, Shionogi & Co. Ltd
| | - Yoshikazu Tanaka
- Shionogi Innovation Center for Drug Discovery, Shionogi & Co. Ltd
| | - Hiroshi Takemoto
- Shionogi Innovation Center for Drug Discovery, Shionogi & Co. Ltd
| | - Hisashi Haga
- Faculty of Advanced Life Science, Hokkaido University
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20
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Atomic force microscopy methodology and AFMech Suite software for nanomechanics on heterogeneous soft materials. Nat Commun 2018; 9:3584. [PMID: 30181577 PMCID: PMC6123404 DOI: 10.1038/s41467-018-05902-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 07/13/2018] [Indexed: 12/13/2022] Open
Abstract
Atomic force microscopy has proven to be a valuable technique to characterize the mechanical and morphological properties of heterogeneous soft materials such as biological specimens in liquid environment. Here we propose a 3-step method in order to investigate biological specimens where heterogeneity hinder a quantitative characterization: (1) precise AFM calibration, (2) nano-indentation in force volume mode, (3) array of finite element simulations built from AFM indentation events. We combine simulations to determine internal geometries, multi-layer material properties, and interfacial friction. In order to easily perform this analysis from raw AFM data to simulation comparison, we propose a standalone software, AFMech Suite comprising five interacting interfaces for simultaneous calibration, morphology, adhesion, mechanical, and simulation analysis. We test the methodology on soft hydrogels with hard spherical inclusions, as a soft-matter model system. Finally, we apply the method on E. coli bacteria supported on soft/hard hydrogels to prove usefulness in biological field. Atomic force microscopy is an indispensable method in characterizing soft materials but the complexity of biological samples makes reproducible measurements difficult. Here the authors use a 3-step method to investigate biological specimens in which vertical and lateral heterogeneity hinders a precise quantitative characterization.
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21
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Vertical Light Sheet Enhanced Side-View Imaging for AFM Cell Mechanics Studies. Sci Rep 2018; 8:1504. [PMID: 29367675 PMCID: PMC5784156 DOI: 10.1038/s41598-018-19791-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 01/08/2018] [Indexed: 12/27/2022] Open
Abstract
The ability to measure dynamic structural changes within a cell under applied load is essential for developing more accurate models of cell mechanics and mechanotransduction. Atomic force microscopy is a powerful tool for evaluating cell mechanics, but the dominant applied forces and sample strains are in the vertical direction, perpendicular to the imaging plane of standard fluorescence imaging. Here we report on a combined sideways imaging and vertical light sheet illumination system integrated with AFM. Our system enables high frame rate, low background imaging of subcellular structural dynamics in the vertical plane synchronized with AFM force data. Using our system for cell compression measurements, we correlated stiffening features in the force indentation data with onset of nuclear deformation revealed in the imaging data. In adhesion studies we were able to correlate detailed features in the force data during adhesive release events with strain at the membrane and within the nucleus.
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22
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Zhu X, Liu L, Wang Z, Liu X. Axisymmetric Contact Problem for a Flattened Cell: Contributions of Substrate Effect and Cell Thickness to the Determination of Viscoelastic Properties by Using AFM Indentation. SCANNING 2017; 2017:8519539. [PMID: 29422981 PMCID: PMC5751394 DOI: 10.1155/2017/8519539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/22/2017] [Accepted: 11/01/2017] [Indexed: 06/08/2023]
Abstract
Nanoindentation technology has proven to be an effective method to investigate the viscoelastic properties of biological cells. The experimental data obtained by nanoindentation are frequently interpreted by Hertz contact model. However, in order to validate Hertz contact model, some studies assume that cells have infinite thickness which does not necessarily represent the real situation. In this study, a rigorous contact model based upon linear elasticity is developed for the interpretation of indentation tests of flattened cells. The cell, normally bonded to the Petri dish, is initially treated as an elastic layer of finite thickness perfectly fixed to a rigid substrate. The theory of linear elasticity is utilized to solve this contact issue and then the solutions are extended to viscoelastic situation which is regarded as a good indicator for mechanical properties of biological cells. To test the present model, AFM-based creep test has been conducted on living human hepatocellular carcinoma cell (SMMC-7721 cell) and its fullerenol-treated counterpart. The results indicate that the present model could not only describe very well the creep behavior of SMMC-7721 cells, but also curb overestimation of the mechanical properties due to substrate effect.
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Affiliation(s)
- Xinyao Zhu
- School of Engineering, University of Warwick, Coventry CV4 7AL, UK
| | - Lanjiao Liu
- International Research Centre for Nano Handling and Manufacturing of China, Changchun University of Science and Technology, Changchun 130022, China
| | - Zuobin Wang
- International Research Centre for Nano Handling and Manufacturing of China, Changchun University of Science and Technology, Changchun 130022, China
| | - X. Liu
- School of Engineering, University of Warwick, Coventry CV4 7AL, UK
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23
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Lee JH, Jung SH, Lee SS, Kwon KY, Sakurai K, Jaworski J, Jung JH. Ultraviolet Patterned Calixarene-Derived Supramolecular Gels and Films with Spatially Resolved Mechanical and Fluorescent Properties. ACS NANO 2017; 11:4155-4164. [PMID: 28358496 DOI: 10.1021/acsnano.7b00997] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Supramolecular assemblies have in the past been considered mechanically weak and in most cases unable to withstand their own weight. Calixarene-derived networks can, however, provide robust supramolecular gels. Incorporating a photoreactive stilbene moiety, we show that the aggregation state of the material can be tuned by heating and UV exposure in order to control the mechanical as well as the fluorescent properties. Regulating the extent of heating to control the proportion of H-aggregates and J-aggregates and further cross-linking of H-aggregates by control over UV exposure allows for adjustable photopatterning of the fluorescence as well as the material stiffness in the range from ∼100 to 450 kPa. We expect this straightforward supramolecular system will be suitable for advanced prototyping in applications where modulus and shape are important design criteria.
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Affiliation(s)
- Ji Ha Lee
- Department of Chemistry and Research Institute of National Sciences, Gyeongsang National University , Jinju, Korea
- Department of Chemistry and Biochemistry, The University of Kitakyushu , Hibikino, Kitakyushu 808-0135, Japan
| | - Sung Ho Jung
- Department of Chemistry and Research Institute of National Sciences, Gyeongsang National University , Jinju, Korea
| | - Shim Sung Lee
- Department of Chemistry and Research Institute of National Sciences, Gyeongsang National University , Jinju, Korea
| | - Ki-Young Kwon
- Department of Chemistry and Research Institute of National Sciences, Gyeongsang National University , Jinju, Korea
| | - Kazuo Sakurai
- Department of Chemistry and Biochemistry, The University of Kitakyushu , Hibikino, Kitakyushu 808-0135, Japan
| | - Justyn Jaworski
- Department of Bioengineering, University of Texas, Arlington , Arlington, Texas 76010, United States
| | - Jong Hwa Jung
- Department of Chemistry and Research Institute of National Sciences, Gyeongsang National University , Jinju, Korea
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24
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Wei F, Yang H, Liu L, Li G. A novel approach for extracting viscoelastic parameters of living cells through combination of inverse finite element simulation and Atomic Force Microscopy. Comput Methods Biomech Biomed Engin 2016; 20:373-384. [PMID: 27627026 DOI: 10.1080/10255842.2016.1233403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Dynamic mechanical behaviour of living cells has been described by viscoelasticity. However, quantitation of the viscoelastic parameters for living cells is far from sophisticated. In this paper, combining inverse finite element (FE) simulation with Atomic Force Microscope characterization, we attempt to develop a new method to evaluate and acquire trustworthy viscoelastic index of living cells. First, influence of the experiment parameters on stress relaxation process is assessed using FE simulation. As suggested by the simulations, cell height has negligible impact on shape of the force-time curve, i.e. the characteristic relaxation time; and the effect originates from substrate can be totally eliminated when stiff substrate (Young's modulus larger than 3 GPa) is used. Then, so as to develop an effective optimization strategy for the inverse FE simulation, the parameters sensitivity evaluation is performed for Young's modulus, Poisson's ratio, and characteristic relaxation time. With the experiment data obtained through typical stress relaxation measurement, viscoelastic parameters are extracted through the inverse FE simulation by comparing the simulation results and experimental measurements. Finally, reliability of the acquired mechanical parameters is verified with different load experiments performed on the same cell.
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Affiliation(s)
- Fanan Wei
- a State Key Laboratory of Robotics, Shenyang Institute of Automation , Chinese Academy of Sciences , Shenyang , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Haitao Yang
- c Department of Electrical and Computer Engineering , University of Pittsburgh , Pittsburgh , PA , USA
| | - Lianqing Liu
- a State Key Laboratory of Robotics, Shenyang Institute of Automation , Chinese Academy of Sciences , Shenyang , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Guangyong Li
- c Department of Electrical and Computer Engineering , University of Pittsburgh , Pittsburgh , PA , USA
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25
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Bayati V, Abbaspour MR, Dehbashi FN, Neisi N, Hashemitabar M. A dermal equivalent developed from adipose-derived stem cells and electrospun polycaprolactone matrix: an in vitro and in vivo study. Anat Sci Int 2016; 92:509-520. [DOI: 10.1007/s12565-016-0352-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 06/10/2016] [Indexed: 01/22/2023]
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26
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Smith Callahan LA. Combinatorial Method/High Throughput Strategies for Hydrogel Optimization in Tissue Engineering Applications. Gels 2016; 2:E18. [PMID: 30674150 PMCID: PMC6318679 DOI: 10.3390/gels2020018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 06/01/2016] [Accepted: 06/03/2016] [Indexed: 12/22/2022] Open
Abstract
Combinatorial method/high throughput strategies, which have long been used in the pharmaceutical industry, have recently been applied to hydrogel optimization for tissue engineering applications. Although many combinatorial methods have been developed, few are suitable for use in tissue engineering hydrogel optimization. Currently, only three approaches (design of experiment, arrays and continuous gradients) have been utilized. This review highlights recent work with each approach. The benefits and disadvantages of design of experiment, array and continuous gradient approaches depending on study objectives and the general advantages of using combinatorial methods for hydrogel optimization over traditional optimization strategies will be discussed. Fabrication considerations for combinatorial method/high throughput samples will additionally be addressed to provide an assessment of the current state of the field, and potential future contributions to expedited material optimization and design.
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Affiliation(s)
- Laura A Smith Callahan
- Vivian L. Smith Department of Neurosurgery & Center for Stem Cells and Regenerative Medicine McGovern Medical School at the University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
- Department of Nanomedicine and Biomedical Engineering, McGovern Medical School at the University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
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27
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Sun L, Huang Y, Bian Z, Petrosino J, Fan Z, Wang Y, Park KH, Yue T, Schmidt M, Galster S, Ma J, Zhu H, Zhang M. Sundew-Inspired Adhesive Hydrogels Combined with Adipose-Derived Stem Cells for Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2016; 8:2423-2434. [PMID: 26731614 PMCID: PMC5139680 DOI: 10.1021/acsami.5b11811] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The potential to harness the unique physical, chemical, and biological properties of the sundew (Drosera) plant's adhesive hydrogels has long intrigued researchers searching for novel wound-healing applications. However, the ability to collect sufficient quantities of the sundew plant's adhesive hydrogels is problematic and has eclipsed their therapeutic promise. Inspired by these natural hydrogels, we asked if sundew-inspired adhesive hydrogels could overcome the drawbacks associated with natural sundew hydrogels and be used in combination with stem-cell-based therapy to enhance wound-healing therapeutics. Using a bioinspired approach, we synthesized adhesive hydrogels comprised of sodium alginate, gum arabic, and calcium ions to mimic the properties of the natural sundew-derived adhesive hydrogels. We then characterized and showed that these sundew-inspired hydrogels promote wound healing through their superior adhesive strength, nanostructure, and resistance to shearing when compared to other hydrogels in vitro. In vivo, sundew-inspired hydrogels promoted a "suturing" effect to wound sites, which was demonstrated by enhanced wound closure following topical application of the hydrogels. In combination with mouse adipose-derived stem cells (ADSCs) and compared to other therapeutic biomaterials, the sundew-inspired hydrogels demonstrated superior wound-healing capabilities. Collectively, our studies show that sundew-inspired hydrogels contain ideal properties that promote wound healing and suggest that sundew-inspired-ADSCs combination therapy is an efficacious approach for treating wounds without eliciting noticeable toxicity or inflammation.
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Affiliation(s)
- Leming Sun
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio 43210, United States
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States
| | - Yujian Huang
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio 43210, United States
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States
| | - Zehua Bian
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States
- Department of Surgery, The Ohio State University, Columbus, Ohio 43210, United States
| | - Jennifer Petrosino
- Biomedical Sciences Graduate Program, College of Medicine, The Ohio State University, Columbus, Ohio 43210, United States
| | - Zhen Fan
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio 43210, United States
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States
| | - Yongzhong Wang
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio 43210, United States
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States
| | - Ki Ho Park
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States
- Department of Surgery, The Ohio State University, Columbus, Ohio 43210, United States
| | - Tao Yue
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio 43210, United States
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States
| | - Michael Schmidt
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Scott Galster
- 711th Human Performance Wing, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7901, United States
| | - Jianjie Ma
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States
- Department of Surgery, The Ohio State University, Columbus, Ohio 43210, United States
| | - Hua Zhu
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States
- Department of Surgery, The Ohio State University, Columbus, Ohio 43210, United States
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, Ohio 43210, United States
| | - Mingjun Zhang
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio 43210, United States
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, Ohio 43210, United States
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28
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Kilpatrick JI, Revenko I, Rodriguez BJ. Nanomechanics of Cells and Biomaterials Studied by Atomic Force Microscopy. Adv Healthc Mater 2015. [PMID: 26200464 DOI: 10.1002/adhm.201500229] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The behavior and mechanical properties of cells are strongly dependent on the biochemical and biomechanical properties of their microenvironment. Thus, understanding the mechanical properties of cells, extracellular matrices, and biomaterials is key to understanding cell function and to develop new materials with tailored mechanical properties for tissue engineering and regenerative medicine applications. Atomic force microscopy (AFM) has emerged as an indispensable technique for measuring the mechanical properties of biomaterials and cells with high spatial resolution and force sensitivity within physiologically relevant environments and timescales in the kPa to GPa elastic modulus range. The growing interest in this field of bionanomechanics has been accompanied by an expanding array of models to describe the complexity of indentation of hierarchical biological samples. Furthermore, the integration of AFM with optical microscopy techniques has further opened the door to a wide range of mechanotransduction studies. In recent years, new multidimensional and multiharmonic AFM approaches for mapping mechanical properties have been developed, which allow the rapid determination of, for example, cell elasticity. This Progress Report provides an introduction and practical guide to making AFM-based nanomechanical measurements of cells and surfaces for tissue engineering applications.
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Affiliation(s)
- Jason I. Kilpatrick
- Conway Institute of Biomolecular and Biomedical Research; University College Dublin; Belfield Dublin 4 Ireland
| | - Irène Revenko
- Asylum Research an Oxford Instruments Company; 6310 Hollister Avenue Santa Barbara CA 93117 USA
| | - Brian J. Rodriguez
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin; Belfield, Dublin 4, Ireland; School of Physics; University College Dublin; Belfield Dublin 4 Ireland
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29
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Mashinchian O, Turner LA, Dalby MJ, Laurent S, Shokrgozar MA, Bonakdar S, Imani M, Mahmoudi M. Regulation of stem cell fate by nanomaterial substrates. Nanomedicine (Lond) 2015; 10:829-47. [DOI: 10.2217/nnm.14.225] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Stem cells are increasingly studied because of their potential to underpin a range of novel therapies, including regenerative strategies, cell type-specific therapy and tissue repair, among others. Bionanomaterials can mimic the stem cell environment and modulate stem cell differentiation and proliferation. New advances in these fields are presented in this review. This work highlights the importance of topography and elasticity of the nano-/micro-environment, or niche, for the initiation and induction of stem cell differentiation and proliferation.
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Affiliation(s)
- Omid Mashinchian
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine (SATiM), Tehran University of Medical Sciences, PO Box 14177–55469, Tehran, Iran
| | - Lesley-Anne Turner
- Centre for Cell Engineering, Joseph Black Building, Institute of Biomedical & Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
| | - Matthew J Dalby
- Centre for Cell Engineering, Joseph Black Building, Institute of Biomedical & Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
| | - Sophie Laurent
- Department of General, Organic & Biomedical Chemistry, NMR & Molecular Imaging Laboratory, University of Mons, Avenue Maistriau 19, B-7000 Mons, Belgium
- CMMI – Center for Microscopy & Molecular Imaging, Rue Adrienne Bolland, 8, B-6041 Gosselies, Belgium
| | | | - Shahin Bonakdar
- National Cell Bank, Pasteur Institute of Iran, PO Box 13169–43551, Tehran, Iran
| | - Mohammad Imani
- Novel Drug Delivery Systems Department, Iran Polymer & Petrochemical Institute (IPPI), PO Box 14965/115, Tehran, Iran
| | - Morteza Mahmoudi
- Department of Nanotechnology & Nanotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, PO Box 14155–6451, Tehran, Iran
- Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA 94305–5101, USA
- Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA 94305–5101, USA
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30
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Xu Q, Li C, Kang Y, Zhang Y. Long term effects of substrate stiffness on the development of hMSC mechanical properties. RSC Adv 2015. [DOI: 10.1039/c5ra17233k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Micropipette aspiration of hMSCs cultured on different PDMS substrates showed that cells aligned their mechanical properties with the substrate stiffness and cell moduli always displayed a non-monotonic trend along culture time.
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Affiliation(s)
- Qinwei Xu
- School of Mechanical and Aerospace Engineering
- Nanyang Technological University
- Singapore
| | - Cheng Li
- School of Mechanical and Aerospace Engineering
- Nanyang Technological University
- Singapore
- Singapore Centre for Environmental Life Sciences Engineering
- Interdisciplinary Graduate School
| | - Yuejun Kang
- School of Chemical and Biological Engineering
- Nanyang Technological University
- Singapore
| | - Yilei Zhang
- School of Mechanical and Aerospace Engineering
- Nanyang Technological University
- Singapore
- Complexity Institute
- Nanyang Technological University
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31
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Fonseca KB, Granja PL, Barrias CC. Engineering proteolytically-degradable artificial extracellular matrices. Prog Polym Sci 2014. [DOI: 10.1016/j.progpolymsci.2014.07.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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