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Laha S, Dhar D, Adak M, Bandopadhyay A, Das S, Chatterjee J, Chakraborty S. Electric field-mediated adhesive dynamics of cells inside bio-functionalised microchannels offers important cues for active control of cell-substrate adhesion. SOFT MATTER 2024; 20:2610-2623. [PMID: 38426537 DOI: 10.1039/d4sm00083h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Adhesive dynamics of cells plays a critical role in determining different biophysical processes orchestrating health and disease in living systems. While the rolling of cells on functionalised substrates having similarity with biophysical pathways appears to be extensively discussed in the literature, the effect of an external stimulus in the form of an electric field on the same remains underemphasized. Here, we bring out the interplay of fluid shear and electric field on the rolling dynamics of adhesive cells in biofunctionalised micro-confinements. Our experimental results portray that an electric field, even restricted to low strengths within the physiologically relevant regimes, can significantly influence the cell adhesion dynamics. We quantify the electric field-mediated adhesive dynamics of the cells in terms of two key parameters, namely, the voltage-altered rolling velocity and the frequency of adhesion. The effect of the directionality of the electric field with respect to the flow direction is also analysed by studying cellular migration with electrical effects acting both along and against the flow. Our experiment, on one hand, demonstrates the importance of collagen functionalisation in the adhesive dynamics of cells through micro channels, while on the other hand, it reveals how the presence of an axial electric field can lead to significant alteration in the kinetic rate of bond breakage, thereby modifying the degree of cell-substrate adhesion and quantifying in terms of the adhesion frequency of the cells. Proceeding further forward, we offer a simple theoretical explanation towards deriving the kinetics of cellular bonding in the presence of an electric field, which corroborates favourably with our experimental outcome. These findings are likely to offer fundamental insights into the possibilities of local control of cellular adhesion via electric field mediated interactions, bearing critical implications in a wide variety of medical conditions ranging from wound healing to cancer metastasis.
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Affiliation(s)
- Sampad Laha
- Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, India.
| | - Dhruba Dhar
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, India
| | - Mainak Adak
- National Institute of Technology, Tiruchirappalli, India
| | - Aditya Bandopadhyay
- Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, India.
| | - Soumen Das
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, India
| | - Jyotirmoy Chatterjee
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, India
| | - Suman Chakraborty
- Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, India.
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, India
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2
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Herzog S, Fläschner G, Incaviglia I, Arias JC, Ponti A, Strohmeyer N, Nava MM, Müller DJ. Monitoring the mass, eigenfrequency, and quality factor of mammalian cells. Nat Commun 2024; 15:1751. [PMID: 38409119 PMCID: PMC10897412 DOI: 10.1038/s41467-024-46056-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 02/06/2024] [Indexed: 02/28/2024] Open
Abstract
The regulation of mass is essential for the development and homeostasis of cells and multicellular organisms. However, cell mass is also tightly linked to cell mechanical properties, which depend on the time scales at which they are measured and change drastically at the cellular eigenfrequency. So far, it has not been possible to determine cell mass and eigenfrequency together. Here, we introduce microcantilevers oscillating in the Ångström range to monitor both fundamental physical properties of the cell. If the oscillation frequency is far below the cellular eigenfrequency, all cell compartments follow the cantilever motion, and the cell mass measurements are accurate. Yet, if the oscillating frequency approaches or lies above the cellular eigenfrequency, the mechanical response of the cell changes, and not all cellular components can follow the cantilever motions in phase. This energy loss caused by mechanical damping within the cell is described by the quality factor. We use these observations to examine living cells across externally applied mechanical frequency ranges and to measure their total mass, eigenfrequency, and quality factor. The three parameters open the door to better understand the mechanobiology of the cell and stimulate biotechnological and medical innovations.
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Affiliation(s)
- Sophie Herzog
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH) Zurich, Klingelbergstrasse 48, 4056, Basel, Switzerland
| | - Gotthold Fläschner
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH) Zurich, Klingelbergstrasse 48, 4056, Basel, Switzerland.
- Nanosurf AG, Gräubernstrasse 12, 4410, Liestal, Switzerland.
| | - Ilaria Incaviglia
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH) Zurich, Klingelbergstrasse 48, 4056, Basel, Switzerland
| | - Javier Casares Arias
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH) Zurich, Klingelbergstrasse 48, 4056, Basel, Switzerland
| | - Aaron Ponti
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH) Zurich, Klingelbergstrasse 48, 4056, Basel, Switzerland
| | - Nico Strohmeyer
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH) Zurich, Klingelbergstrasse 48, 4056, Basel, Switzerland
| | - Michele M Nava
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH) Zurich, Klingelbergstrasse 48, 4056, Basel, Switzerland
| | - Daniel J Müller
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH) Zurich, Klingelbergstrasse 48, 4056, Basel, Switzerland.
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3
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Banerjee A, Datta S, Das A, Roy Chowdhury A, Datta P. A Micro-Scale Non-Linear Finite Element Model to Optimize the Mechanical Behavior of Bioprinted Constructs. 3D PRINTING AND ADDITIVE MANUFACTURING 2022; 9:490-502. [PMID: 36660750 PMCID: PMC9831571 DOI: 10.1089/3dp.2021.0238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Extrusion-based bioprinting is an enabling biofabrication technique that is used to create heterogeneous tissue constructs according to patient-specific geometries and compositions. The optimization of bioinks as per requirements for specific tissue applications is an essential exercise in ensuring clinical translation of the bioprinting technologies. Most notably, optimum hydrogel polymer concentrations are required to ensure adequate mechanical properties of bioprinted constructs without causing significant shear stresses on cells. However, experimental iterations are often tedious for optimizing the bioink properties. In this work, a nonlinear finite element modeling approach has been undertaken to determine the effect of different bioink parameters such as composition, concentration on the range of stresses being experienced by the cells in the bioprinted construct. The stress distribution of the cells at different parts of the constructs has also been modeled. It is found that both bioink chemical compositions and concentrations can substantially alter the stress effects experienced by the cells. Concentrated regions of softer cells near pore regions were found to increase stress concentrations by almost three times compared with stress generated in cells away from the pores. The study provides a method for rapid optimization of bioinks, design of bioprinted constructs, as well as toolpath plans for fabricating constructs with homogenous properties.
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Affiliation(s)
- Abhinaba Banerjee
- Department of Mechanical Engineering, Indian Institute of Engineering Science and Technology, Howrah, India
| | - Sudipto Datta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Howrah, India
| | - Ankita Das
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Howrah, India
| | - Amit Roy Chowdhury
- Department of Aerospace Engineering and Applied Mechanics, Indian Institute of Engineering Science and Technology, Howrah, India
| | - Pallab Datta
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Kolkata, India
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4
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Cui Y, Leong WH, Liu CF, Xia K, Feng X, Gergely C, Liu RB, Li Q. Revealing Capillarity in AFM Indentation of Cells by Nanodiamond-Based Nonlocal Deformation Sensing. NANO LETTERS 2022; 22:3889-3896. [PMID: 35507005 DOI: 10.1021/acs.nanolett.1c05037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nanoindentation based on atomic force microscopy (AFM) can measure the elasticity of biomaterials and cells with high spatial resolution and sensitivity, but relating the data to quantitative mechanical properties depends on information on the local contact, which is unclear in most cases. Here, we demonstrate nonlocal deformation sensing on biorelevant soft matters upon AFM indentation by using nitrogen-vacancy centers in nanodiamonds, providing data for studying both the elasticity and capillarity without requiring detailed knowledge about the local contact. Using fixed HeLa cells for demonstration, we show that the apparent elastic moduli of the cells would have been overestimated if the capillarity was not considered. In addition, we observe that both the elastic moduli and the surface tensions are reduced after depolymerization of the actin cytoskeleton in cells. This work demonstrates that the nanodiamond sensing of nonlocal deformation with nanometer precision is particularly suitable for studying mechanics of soft biorelevant materials.
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Affiliation(s)
- Yue Cui
- Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Weng-Hang Leong
- Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Chu-Feng Liu
- Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Kangwei Xia
- Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Xi Feng
- Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Csilla Gergely
- Laboratoire Charles Coulomb, University of Montpellierr, CNRS, Montpellier, 34095, France
| | - Ren-Bao Liu
- Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Centre for Quantum Coherence, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- The Hong Kong Institute of Quantum Information Science and Technology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Quan Li
- Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Centre for Quantum Coherence, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- The Hong Kong Institute of Quantum Information Science and Technology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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5
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Arjona MI, Duch M, Hernández-Pinto A, Vázquez P, Agusil JP, Gómez-Martínez R, Redondo-Horcajo M, Amirthalingam E, Pérez-García L, Suárez T, Plaza JA. Intracellular Mechanical Drugs Induce Cell-Cycle Altering and Cell Death. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2109581. [PMID: 35174908 DOI: 10.1002/adma.202109581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 02/01/2022] [Indexed: 06/14/2023]
Abstract
Current advances in materials science have demonstrated that extracellular mechanical cues can define cell function and cell fate. However, a fundamental understanding of the manner in which intracellular mechanical cues affect cell mechanics remains elusive. How intracellular mechanical hindrance, reinforcement, and supports interfere with the cell cycle and promote cell death is described here. Reproducible devices with highly controlled size, shape, and with a broad range of stiffness are internalized in HeLa cells. Once inside, they induce characteristic cell-cycle deviations and promote cell death. Device shape and stiffness are the dominant determinants of mechanical impairment. Device structural support to the cell membrane and centering during mitosis maximize their effects, preventing spindle centering, and correct chromosome alignment. Nanodevices reveal that the spindle generates forces larger than 114 nN which overcomes intracellular confinement by relocating the device to a less damaging position. By using intracellular mechanical drugs, this work provides a foundation to defining the role of intracellular constraints on cell function and fate, with relevance to fundamental cell mechanics and nanomedicine.
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Affiliation(s)
- María Isabel Arjona
- Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus UAB, Cerdanyola del Vallès, Barcelona, 08193, Spain
| | - Marta Duch
- Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus UAB, Cerdanyola del Vallès, Barcelona, 08193, Spain
| | | | - Patricia Vázquez
- Centro de Investigaciones Biológicas Margarita Salas, CIB (CSIC), Madrid, 28040, Spain
| | - Juan Pablo Agusil
- Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus UAB, Cerdanyola del Vallès, Barcelona, 08193, Spain
| | - Rodrigo Gómez-Martínez
- Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus UAB, Cerdanyola del Vallès, Barcelona, 08193, Spain
| | | | - Ezhil Amirthalingam
- Departament de Farmacologia, Toxicologia i Química Terapèutica and Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, Barcelona, 08028, Spain
| | - Lluïsa Pérez-García
- Departament de Farmacologia, Toxicologia i Química Terapèutica and Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, Barcelona, 08028, Spain
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Teresa Suárez
- Centro de Investigaciones Biológicas Margarita Salas, CIB (CSIC), Madrid, 28040, Spain
| | - José A Plaza
- Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus UAB, Cerdanyola del Vallès, Barcelona, 08193, Spain
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6
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Skok K, Gradišnik L, Čelešnik H, Milojević M, Potočnik U, Jezernik G, Gorenjak M, Sobočan M, Takač I, Kavalar R, Maver U. MFUM-BrTNBC-1, a Newly Established Patient-Derived Triple-Negative Breast Cancer Cell Line: Molecular Characterisation, Genetic Stability, and Comprehensive Comparison with Commercial Breast Cancer Cell Lines. Cells 2021; 11:cells11010117. [PMID: 35011679 PMCID: PMC8749978 DOI: 10.3390/cells11010117] [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] [Received: 10/14/2021] [Revised: 12/18/2021] [Accepted: 12/27/2021] [Indexed: 12/11/2022] Open
Abstract
Triple-negative breast cancer (TNBC) is a breast cancer (BC) subtype that accounts for approximately 15–20% of all BC cases. Cancer cell lines (CLs) provide an efficient way to model the disease. We have recently isolated a patient-derived triple-negative BC CL MFUM-BrTNBC-1 and performed a detailed morphological and molecular characterisation and a comprehensive comparison with three commercial BC CLs (MCF-7, MDA-MB-231, MDA-MB-453). Light and fluorescence microscopy were used for morphological studies; immunocytochemical staining for hormone receptor, p53 and Ki67 status; RNA sequencing, qRT-PCR and STR analysis for molecular characterisation; and biomedical image analysis for comparative phenotypical analysis. The patient tissue-derived MFUM-BrTNBC-1 maintained the primary triple-negative receptor status. STR analysis showed a stable and unique STR profile up to the 6th passage. MFUM-BrTNBC-1 expressed EMT transition markers and displayed changes in several cancer-related pathways (MAPK, Wnt and PI3K signalling; nucleotide excision repair; and SWI/SNF chromatin remodelling). Morphologically, MFUM-BrTNBC-1 differed from the commercial TNBC CL MDA-MB-231. The advantages of MFUM-BrTNBC-1 are its isolation from a primary tumour, rather than a metastatic site; good growth characteristics; phenotype identical to primary tissue; complete records of origin; a unique identifier; complete, unique STR profile; quantifiable morphological properties; and genetic stability up to (at least) the 6th passage.
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Affiliation(s)
- Kristijan Skok
- Department of Pathology, Hospital Graz II, Location West, Göstinger Straße 22, 8020 Graz, Austria
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
- Correspondence: (K.S.); (U.M.); Tel.: +43-316-5466-5541 (K.S.); +386-2-234-5823 (U.M.)
| | - Lidija Gradišnik
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
| | - Helena Čelešnik
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
- Faculty of Chemistry & Chemical Engineering, University of Maribor, Smetanova Ulica 17, 2000 Maribor, Slovenia
| | - Marko Milojević
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
| | - Uroš Potočnik
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
- Faculty of Chemistry & Chemical Engineering, University of Maribor, Smetanova Ulica 17, 2000 Maribor, Slovenia
| | - Gregor Jezernik
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
| | - Mario Gorenjak
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
| | - Monika Sobočan
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
- Division for Gynecology and Perinatology, University Medical Centre Maribor, Ljubljanska Ulica 5, 2000 Maribor, Slovenia
| | - Iztok Takač
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
- Division for Gynecology and Perinatology, University Medical Centre Maribor, Ljubljanska Ulica 5, 2000 Maribor, Slovenia
| | - Rajko Kavalar
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
- Department of Pathology, University Medical Centre Maribor, Ljubljanska Ulica 5, 2000 Maribor, Slovenia
| | - Uroš Maver
- Faculty of Medicine, University of Maribor, Taborska Ulica 8, 2000 Maribor, Slovenia; (L.G.); (H.Č.); (M.M.); (U.P.); (G.J.); (M.G.); (M.S.); (I.T.); (R.K.)
- Correspondence: (K.S.); (U.M.); Tel.: +43-316-5466-5541 (K.S.); +386-2-234-5823 (U.M.)
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7
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Liu X, Wei Y, Li W, Li B, Liu L. Cytoskeleton induced the changes of microvilli and mechanical properties in living cells by atomic force microscopy. J Cell Physiol 2020; 236:3725-3733. [PMID: 33169846 DOI: 10.1002/jcp.30110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/08/2020] [Accepted: 10/05/2020] [Indexed: 01/05/2023]
Abstract
The cytoskeleton acts as a scaffold for membrane protrusion, such as microvilli. However, the relationship between the characteristics of microvilli and cytoskeleton remains poorly understood under the physiological state. To investigate the role of the cytoskeleton in regulating microvilli and cellular mechanical properties, atomic force microscopy (AFM) was used to detect the dynamic characteristics of microvillus morphology and elastic modulus of living HeLa cells. First, HeLa and MCF-7 cell lines were stained with Fluor-488-phalloidin and microtubules antibody. Then, the microvilli morphology was analyzed by high-resolution images of AFM in situ. Furthermore, changes in elastic modulus were investigated by the force curve of AFM. Fluorescence microscopy and AFM results revealed that destroyed microfilaments led to a smaller microvilli size, whereas the increase in the aggregation and number of microfilaments led to a larger microvilli size. The destruction and aggregation of microfilaments remarkably affected the mechanical properties of HeLa cells. Microtubule-related drugs induced the change of microtubule, but we failed to note significant differences in microvilli morphology and mechanical properties of cells. In summary, our results unraveled the relationship between microfilaments and the structure of microvilli and Young's modulus in living HeLa cells, which would contribute to the further understanding of the physiological function of the cytoskeleton in vivo.
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Affiliation(s)
- Xueyan Liu
- Key Laboratory of Medicine, School of Laboratory Medicine and Life Sciences, Ministry of Education of China, Wenzhou Medical University, Wenzhou, China
| | - Yuhui Wei
- Division of Physical Biology and Bioimaging Centre, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Chinese Academy of Sciences, Shanghai Institute of Applied Physics, Shanghai, China.,Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China
| | - Wei Li
- Key Laboratory of Medicine, School of Laboratory Medicine and Life Sciences, Ministry of Education of China, Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Medical Genetics, Wenzhou Medical University, Wenzhou, China
| | - Bin Li
- Division of Physical Biology and Bioimaging Centre, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Chinese Academy of Sciences, Shanghai Institute of Applied Physics, Shanghai, China.,Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China
| | - Lin Liu
- Key Laboratory of Medicine, School of Laboratory Medicine and Life Sciences, Ministry of Education of China, Wenzhou Medical University, Wenzhou, China.,Division of Physical Biology and Bioimaging Centre, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Chinese Academy of Sciences, Shanghai Institute of Applied Physics, Shanghai, China.,Zhejiang Provincial Key Laboratory of Medical Genetics, Wenzhou Medical University, Wenzhou, China
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8
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Zhang Y, Jimenez de Aberasturi D, Henriksen-Lacey M, Langer J, Liz-Marzán LM. Live-Cell Surface-Enhanced Raman Spectroscopy Imaging of Intracellular pH: From Two Dimensions to Three Dimensions. ACS Sens 2020; 5:3194-3206. [PMID: 33092346 DOI: 10.1021/acssensors.0c01487] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Visualization of intracellular pH (i-pH) using surface-enhanced Raman spectroscopy (SERS) plays an important role toward understanding of cellular processes including their interactions with nanoparticles. However, conventional two-dimensional SERS imaging often fails to take into consideration changes occurring in the whole-cell volume. We therefore aimed at obtaining a comprehensive i-pH profile of living cells by means of three-dimensional (3D) SERS imaging, thereby visualizing dynamic i-pH distribution changes in a single cell. We devised here a biocompatible and highly stable SERS pH probe, comprising plasmonic gold nanostars functionalized with a pH-sensitive Raman reporter tag-4-mercaptobenzoic acid-and protected by a cationic biocompatible polymer, poly-l-arginine hydrochloride (PA). The positively charged PA coating plays a double role in enhancing cell uptake and providing chemical and colloidal stability in cellular environments. The SERS-active pH probe allowed visualization of local changes in i-pH, such as acidification during nanoparticle (NP) endocytosis. We provide evidence of i-pH changes during NP endocytosis via high-resolution 3D SERS imaging, thereby opening new avenues toward the application of SERS to intracellular studies.
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Affiliation(s)
- Yizhi Zhang
- Advanced Photonics Center, Southeast University, 210096 Nanjing, China
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
| | - Dorleta Jimenez de Aberasturi
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
- Centro de Investigación Biomédica en Red, Bioingeniería, Biomateriales y Nanomedicina (Ciber-BBN), Paseo de Miramón 194, 20014 Donostia-San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Malou Henriksen-Lacey
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
- Centro de Investigación Biomédica en Red, Bioingeniería, Biomateriales y Nanomedicina (Ciber-BBN), Paseo de Miramón 194, 20014 Donostia-San Sebastián, Spain
| | - Judith Langer
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
| | - Luis M. Liz-Marzán
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
- Centro de Investigación Biomédica en Red, Bioingeniería, Biomateriales y Nanomedicina (Ciber-BBN), Paseo de Miramón 194, 20014 Donostia-San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
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9
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Choi YH, Kim JA, Lee W. Changes of Inertial Focusing Position in a Triangular Channel Depending on Droplet Deformability and Size. MICROMACHINES 2020; 11:E839. [PMID: 32906834 PMCID: PMC7570260 DOI: 10.3390/mi11090839] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/03/2020] [Accepted: 09/04/2020] [Indexed: 12/17/2022]
Abstract
Studies on cell separation with inertial microfluidics are often carried out with solid particles initially. When this condition is applied for actual cell separations, the efficiency typically becomes lower because of the polydispersity and deformability of cells. Therefore, the understanding of deformability-induced lift force is essential to achieve highly efficient cell separation. We investigate the inertial focusing positions of viscous droplets in a triangular channel while varying Re, deformability, and droplet size. With increasing Re and decreasing droplet size, the top focusing position splits and shifts along the sidewalls. The threshold size of the focusing position splitting increases for droplets with larger deformability. The overall path of the focusing position shifts with increasing Re also has a strong dependency on deformability. Consequently, droplets of the same size can have different focusing positions depending on their deformability. The feasibility of deformability-based cell separation is shown by different focusing positions of MCF10a and MCF7 cells.
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Affiliation(s)
- Yo-han Choi
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea;
| | - Jeong-ah Kim
- Department of Physics, KAIST, Daejeon 34141, Korea;
| | - Wonhee Lee
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea;
- Department of Physics, KAIST, Daejeon 34141, Korea;
- Department of Bio and Brain Engineering, KAIST, Daejeon 34141, Korea
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10
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Song J, Meng X, Zhang H, Zhao K, Hu Y, Xie H. Probing Multidimensional Mechanical Phenotyping of Intracellular Structures by Viscoelastic Spectroscopy. ACS APPLIED MATERIALS & INTERFACES 2020; 12:1913-1923. [PMID: 31802656 DOI: 10.1021/acsami.9b19597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Mechanical phenotyping of complex cellular structures gives insight into the process and function of mechanotransduction in biological systems. Several methods have been developed to characterize intracellular elastic moduli, while direct viscoelastic characterization of intracellular structures is still challenging. Here, we develop a needle tip viscoelastic spectroscopy method to probe multidimensional mechanical phenotyping of intracellular structures during a mini-invasive penetrating process. Viscoelastic spectroscopy is determined by magnetically driven resonant vibration (about 15 kHz) with a tiny amplitude. It not only detects the unique dynamic stiffness, damping, and loss tangent of the cell membrane-cytoskeleton and nucleus-nuclear lamina but also bridges viscoelastic parameters between the mitotic phase and interphase. Self-defined dynamic mechanical ratios of these two phases can identify two malignant cervical cancer cell lines (HeLa-HPV18+, SiHa-HPV16+) whose membrane or nucleus elastic moduli are indistinguishable. This technique provides a quantitative method for studying mechanosensation, mechanotransduction, and mechanoresponse of intracellular structures from a dynamic mechanical perspective. This technique has the potential to become a reliable quantitative measurement method for dynamic mechanical studies of intracellular structures.
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11
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Skalska J, Oliveira FD, Figueira TN, Mello ÉO, Gomes VM, McNaughton-Smith G, Castanho MARB, Gaspar D. Plant defensin PvD 1 modulates the membrane composition of breast tumour-derived exosomes. NANOSCALE 2019; 11:23366-23381. [PMID: 31793603 DOI: 10.1039/c9nr07843f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
One of the most important causes of failure in tumour treatment is the development of resistance to therapy. Cancer cells can develop the ability to lose sensitivity to anti-neoplastic drugs during reciprocal crosstalk between cells and their interaction with the tumour microenvironment (TME). Cell-to-cell communication regulates a cascade of interdependent events essential for disease development and progression and can be mediated by several signalling pathways. Exosome-mediated communication is one of the pathways regulating these events. Tumour-derived exosomes (TDE) are believed to have the ability to modulate TMEs and participate in multidrug resistance mechanisms. In this work, we studied the effect of the natural defensin from common bean, PvD1, on the formation of exosomes by breast cancer MCF-7 cells, mainly the modulatory effect it has on the level of CD63 and CD9 tetraspanins. Moreover, we followed the interaction of PvD1 with biological and model membranes of selected composition, by biophysical and imaging techniques. Overall, the results show that PvD1 induces a dual effect on MCF-7 derived exosomes: the peptide attenuates the recruitment of CD63 and CD9 to exosomes intracellularly and binds to the mature exosomes in the extracellular environment. This work uncovers the exosome-mediated anticancer action of PvD1, a potential nutraceutical agent.
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Affiliation(s)
- Julia Skalska
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.
| | - Filipa D Oliveira
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.
| | - Tiago N Figueira
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.
| | - Érica O Mello
- Laboratório de Fisiologia e Bioquímica de Microrganismos do Centro de Biociências e Biotecnologia da Universidade Estadual do Norte Fluminense Darcy Ribeiro, Rio de Janeiro, Brazil
| | - Valdirene M Gomes
- Laboratório de Fisiologia e Bioquímica de Microrganismos do Centro de Biociências e Biotecnologia da Universidade Estadual do Norte Fluminense Darcy Ribeiro, Rio de Janeiro, Brazil
| | - Grant McNaughton-Smith
- CEAMED - Centro Atlántico del Medicamento, S.A., San Cristobal de La Laguna, S/C Tenerife, Spain
| | - Miguel A R B Castanho
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.
| | - Diana Gaspar
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.
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12
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Iturri J, Weber A, Moreno-Cencerrado A, Vivanco MDM, Benítez R, Leporatti S, Toca-Herrera JL. Resveratrol-Induced Temporal Variation in the Mechanical Properties of MCF-7 Breast Cancer Cells Investigated by Atomic Force Microscopy. Int J Mol Sci 2019; 20:E3275. [PMID: 31277289 PMCID: PMC6651212 DOI: 10.3390/ijms20133275] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/28/2019] [Accepted: 07/01/2019] [Indexed: 12/12/2022] Open
Abstract
Atomic force microscopy (AFM) combined with fluorescence microscopy has been used to quantify cytomechanical modifications induced by resveratrol (at a fixed concentration of 50 µM) in a breast cancer cell line (MCF-7) upon temporal variation. Cell indentation methodology has been utilized to determine simultaneous variations of Young's modulus, the maximum adhesion force, and tether formation, thereby determining cell motility and adhesiveness. Effects of treatment were measured at several time-points (0-6 h, 24 h, and 48 h); longer exposures resulted in cell death. Our results demonstrated that AFM can be efficiently used as a diagnostic tool to monitor irreversible morpho/nano-mechanical changes in cancer cells during the early steps of drug treatment.
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Affiliation(s)
- Jagoba Iturri
- Institute for Biophysics, Department of Nanobiotechnology (DNBT), BOKU University for Natural Resources and Life Sciences, Muthgasse 11 (Simon Zeisel Haus), A-1190 Vienna, Austria.
| | - Andreas Weber
- Institute for Biophysics, Department of Nanobiotechnology (DNBT), BOKU University for Natural Resources and Life Sciences, Muthgasse 11 (Simon Zeisel Haus), A-1190 Vienna, Austria
| | - Alberto Moreno-Cencerrado
- Institute for Biophysics, Department of Nanobiotechnology (DNBT), BOKU University for Natural Resources and Life Sciences, Muthgasse 11 (Simon Zeisel Haus), A-1190 Vienna, Austria
- Research Institute of Molecular Pathology (IMP). Campus-Vienna-Biocenter 1, 1030 Vienna, Austria
| | - Maria dM Vivanco
- Cancer Heterogeneity Lab, CIC bioGUNE, Bizkaia Science and Technology Park, 48160 Derio, Spain
| | - Rafael Benítez
- Department Matemáticas para la Economía y la Empresa, Facultad de Economía, Universidad de Valencia, Avda. Tarongers s/n, 46022 Valencia, Spain
| | - Stefano Leporatti
- CNR Nanotec-Istituto di Nanotecnologia, Polo di Nanotecnologia c/o Campus Ecoteckne, Via Monteroni, 73100 Lecce, Italy.
| | - José Luis Toca-Herrera
- Institute for Biophysics, Department of Nanobiotechnology (DNBT), BOKU University for Natural Resources and Life Sciences, Muthgasse 11 (Simon Zeisel Haus), A-1190 Vienna, Austria
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13
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A Microfluidic Micropipette Aspiration Device to Study Single-Cell Mechanics Inspired by the Principle of Wheatstone Bridge. MICROMACHINES 2019; 10:mi10020131. [PMID: 30781497 PMCID: PMC6413237 DOI: 10.3390/mi10020131] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/11/2019] [Accepted: 02/11/2019] [Indexed: 12/20/2022]
Abstract
The biomechanical properties of single cells show great potential for early disease diagnosis and effective treatments. In this study, a microfluidic device was developed for quantifying the mechanical properties of a single cell. Micropipette aspiration was integrated into a microfluidic device that mimics a classical Wheatstone bridge circuit. This technique allows us not only to effectively alter the flow direction for single-cell trapping, but also to precisely control the pressure exerted on the aspirated cells, analogous to the feature of the Wheatstone bridge that can precisely control bridge voltage and current. By combining the micropipette aspiration technique into the microfluidic device, we can effectively trap the microparticles and Hela cells as well as measure the deformability of cells. The Young's modulus of Hela cells was evaluated to be 387 ± 77 Pa, which is consistent with previous micropipette aspiration studies. The simplicity, precision, and usability of our device show good potential for biomechanical trials in clinical diagnosis and cell biology research.
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14
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Stylianou A, Lekka M, Stylianopoulos T. AFM assessing of nanomechanical fingerprints for cancer early diagnosis and classification: from single cell to tissue level. NANOSCALE 2018; 10:20930-20945. [PMID: 30406223 DOI: 10.1039/c8nr06146g] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Cancer development and progression are closely associated with changes both in the mechano-cellular phenotype of cancer and stromal cells and in the extracellular matrix (ECM) structure, composition, and mechanics. In this paper, we review the use of atomic force microscopy (AFM) as a tool for assessing the nanomechanical fingerprints of solid tumors, so as to be potentially used as a diagnostic biomarker for more accurate identification and early cancer grading/classification. The development of such a methodology is expected to provide new insights and a novel approach for cancer diagnosis. We propose that AFM measurements could be employed to complement standard biopsy procedures, offering an objective, novel and quantitative diagnostic approach with the properties of a blind assay, allowing unbiased evaluation of the sample.
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Affiliation(s)
- Andreas Stylianou
- Cancer Biophysics Laboratory, Department of Mechanical and Manufacturing Engineering, University of Cyprus, Cyprus.
| | - Malgorzata Lekka
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Kraków, Poland.
| | - Triantafyllos Stylianopoulos
- Cancer Biophysics Laboratory, Department of Mechanical and Manufacturing Engineering, University of Cyprus, Cyprus.
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15
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Tian F, Cai L, Chang J, Li S, Liu C, Li T, Sun J. Label-free isolation of rare tumor cells from untreated whole blood by interfacial viscoelastic microfluidics. LAB ON A CHIP 2018; 18:3436-3445. [PMID: 30328446 DOI: 10.1039/c8lc00700d] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Label-free, high-throughput, and efficient separation and enrichment of rare tumor cells, such as circulating tumor cells (CTCs), from untreated whole blood is a challenging task, owing to extremely rare events of CTCs and an enormous amount of blood cells. Current strategies for CTC separation always require pre-processing steps including lysis of blood or labeling of CTCs, leading to loss or damage of CTCs. Here, we report an interfacial viscoelastic microfluidic system for size-selective separation of tumor cells directly from whole blood, without the need of cell labeling and other treatments. The sharp flow interfaces between the sample flow and viscoelastic flow (0.05% PEO solutions) in the straight microchannel allow for the penetration of large tumor cells while blocking small blood cells, through exploiting the competition between the inertial lift forces and interfacial elastic lift forces. The microfluidic paradigm does not involve external force fields or complicated fabrication procedures, while achieving 95.1% separation efficiency and 77.5% recovery rate for isolating as few as 50 tumor cells in 1 mL whole blood. The viability of tumor cells after separation is ∼100%, and normal proliferation of separated tumor cells is observed. The interfacial viscoelastic microfluidics holds great promise to facilitate the fundamental and clinical studies of CTCs.
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Affiliation(s)
- Fei Tian
- School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China.
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16
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Bianco M, Vergara D, De Domenico S, Maffia M, Gaballo A, Arima V. Quartz Crystal Microbalance as Cell-Based Biosensor to Detect and Study Cytoskeletal Alterations and Dynamics. Biotechnol J 2018; 13:e1700699. [PMID: 29663725 DOI: 10.1002/biot.201700699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 03/09/2018] [Indexed: 02/04/2023]
Abstract
Several techniques can be used to monitor cell dynamism after a perturbation. Among these, Quartz Crystal Microbalance with Dissipation Monitoring (QCM-D) offers the great advantage to study the mechanical properties of cells in real-time and with a great sensitivity. Here, we used QCM-D to investigate the effects of two cytoskeleton-targeting agents, cytochalasin D (CytoD) and Y27632, on human MCF-7 cells. Cell adhesion on the sensor surface, crucial for in-flow experiments, was obtained by covalent adsorption of a fibronectin (FN) film, an extracellular matrix (ECM) protein. Direct analysis of MCF-7 cells on FN-coated sensor, shows a specific cellular response that was revealed and quantified by QCM-D after drugs exposure. Notably, upon treatment with Y27632, we observed a two-regime dissipation behavior that we associated with specific modifications of actin filaments and signaling proteins providing a link between biophysical and molecular mechanisms. Overall, this approach opens new opportunities for studying cellular response to mechanical cues in different biological conditions.
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Affiliation(s)
- Monica Bianco
- CNR-NANOTEC, Institute of Nanotechnology c/o Campus Ecotekne, Lecce, Italy
| | - Daniele Vergara
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy.,Laboratory of Clinical Proteo-mics, "Giovanni Paolo II" Hospital, ASL-Lecce, Italy
| | - Stefania De Domenico
- Biotecgen, c/o Department of Biological and Environmental Sciences and Technologies, Lecce, Italy.,Institute of Sciences of Food Production, National Research Council, Lecce, Italy
| | - Michele Maffia
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy.,Laboratory of Clinical Proteo-mics, "Giovanni Paolo II" Hospital, ASL-Lecce, Italy
| | - Antonio Gaballo
- CNR-NANOTEC, Institute of Nanotechnology c/o Campus Ecotekne, Lecce, Italy
| | - Valentina Arima
- CNR-NANOTEC, Institute of Nanotechnology c/o Campus Ecotekne, Lecce, Italy
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17
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Zemła J, Danilkiewicz J, Orzechowska B, Pabijan J, Seweryn S, Lekka M. Atomic force microscopy as a tool for assessing the cellular elasticity and adhesiveness to identify cancer cells and tissues. Semin Cell Dev Biol 2018; 73:115-124. [DOI: 10.1016/j.semcdb.2017.06.029] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 06/27/2017] [Accepted: 06/29/2017] [Indexed: 11/27/2022]
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18
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Cascione M, De Matteis V, Toma CC, Pellegrino P, Leporatti S, Rinaldi R. Morphomechanical and structural changes induced by ROCK inhibitor in breast cancer cells. Exp Cell Res 2017; 360:303-309. [PMID: 28935466 DOI: 10.1016/j.yexcr.2017.09.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/08/2017] [Accepted: 09/13/2017] [Indexed: 11/20/2022]
Abstract
The EMT phenomenon is based on tumour progression. The cells lose their physiologic phenotype and assumed a mesenchymal phenotype characterized by an increased migratory capacity, invasiveness and high resistance to apoptosis. In this process, RHO family regulates the activation or suppression of ROCK (Rho-associated coiled-coil containing protein kinase) which in turn regulates the cytoskeleton dynamics. However, while the biochemical mechanisms are widely investigated, a comprehensive and careful estimation of biomechanical changes has not been extensively addressed. In this work, we used a strong ROCK inhibitor, Y-27632, to evaluate the effects of inhibition on living breast cancer epithelial cells by a biomechanical approach. Atomic Force Microscopy (AFM) was used to estimate changes of cellular elasticity, quantified by Young's modulus parameter. The morphometric alterations were analyzed by AFM topographies and Confocal Laser Scanning Microscopy (CLSM). Our study revealed a significant modification in the Young's modulus after treatment, especially as regards cytoskeletal region. Our evidences suggest that the use of Y-27632 enhanced the cell rigidity, preventing cell migration and arrested the metastasization process representing a potential powerful factor for cancer treatment.
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Affiliation(s)
- Mariafrancesca Cascione
- Dipartimento di Scienze Biomediche e Oncologia Umana, Università degli Studi di Bari "Aldo Moro", c/o Policlinico Bari, Bari, Italy
| | - Valeria De Matteis
- Dipartimento di Matematica e Fisica "E. De Giorgi", Università del Salento, Via Monteroni, 73100 Lecce, Italy
| | - Chiara Cristina Toma
- Dipartimento di Matematica e Fisica "E. De Giorgi", Università del Salento, Via Monteroni, 73100 Lecce, Italy
| | - Paolo Pellegrino
- Dipartimento di Matematica e Fisica "E. De Giorgi", Università del Salento, Via Monteroni, 73100 Lecce, Italy
| | - Stefano Leporatti
- CNR Nanotec-Istituto di Nanotecnologia, Polo di Nanotecnologia, c/o Campus Ecoteckne, Lecce, Italy.
| | - Rosaria Rinaldi
- Dipartimento di Matematica e Fisica "E. De Giorgi", Università del Salento, Via Monteroni, 73100 Lecce, Italy
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19
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Alpha-enolase (ENO1) controls alpha v/beta 3 integrin expression and regulates pancreatic cancer adhesion, invasion, and metastasis. J Hematol Oncol 2017; 10:16. [PMID: 28086938 PMCID: PMC5237223 DOI: 10.1186/s13045-016-0385-8] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Accepted: 12/30/2016] [Indexed: 01/15/2023] Open
Abstract
Background We have previously shown that in pancreatic ductal adenocarcinoma (PDA) cells, the glycolytic enzyme alpha-enolase (ENO1) also acts as a plasminogen receptor and promotes invasion and metastasis formation. Moreover, ENO1 silencing in PDA cells induces oxidative stress, senescence and profoundly modifies PDA cell metabolism. Although anti-ENO1 antibody inhibits PDA cell migration and invasion, little is known about the role of ENO1 in regulating cell-cell and cell-matrix contacts. We therefore investigated the effect of ENO1 silencing on the modulation of cell morphology, adhesion to matrix substrates, cell invasiveness, and metastatic ability. Methods The membrane and cytoskeleton modifications that occurred in ENO1-silenced (shENO1) PDA cells were investigated by a combination of confocal microscopy and atomic force microscopy (AFM). The effect of ENO1 silencing was then evaluated by phenotypic and functional experiments to identify the role of ENO1 in adhesion, migration, and invasion, as well as in senescence and apoptosis. The experimental results were then validated in a mouse model. Results We observed a significant increase in the roughness of the cell membrane due to ENO1 silencing, a feature associated with an impaired ability to migrate and invade, along with a significant downregulation of proteins involved in cell-cell and cell-matrix adhesion, including alpha v/beta 3 integrin in shENO1 PDA cells. These changes impaired the ability of shENO1 cells to adhere to Collagen I and IV and Fibronectin and caused an increase in RGD-independent adhesion to vitronectin (VN) via urokinase plasminogen activator receptor (uPAR). Binding of uPAR to VN triggers integrin-mediated signals, which result in ERK1-2 and RAC activation, accumulation of ROS, and senescence. In shENO1 cancer cells, the use of an anti-uPAR antibody caused significant reduction of ROS production and senescence. Overall, a decrease of in vitro and in vivo cell migration and invasion of shENO1 PDA cells was observed. Conclusion These data demonstrate that ENO1 promotes PDA survival, migration, and metastasis through cooperation with integrins and uPAR. Electronic supplementary material The online version of this article (doi:10.1186/s13045-016-0385-8) contains supplementary material, which is available to authorized users.
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20
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Vergara D, Ferraro MM, Cascione M, del Mercato LL, Leporatti S, Ferretta A, Tanzarella P, Pacelli C, Santino A, Maffia M, Cocco T, Rinaldi R, Gaballo A. Cytoskeletal Alterations and Biomechanical Properties of parkin-Mutant Human Primary Fibroblasts. Cell Biochem Biophys 2016; 71:1395-404. [PMID: 25399302 DOI: 10.1007/s12013-014-0362-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Parkinson's disease (PD) is one of the most common neurodegenerative diseases. Genes which have been implicated in autosomal-recessive PD include PARK2 which codes for parkin, an E3 ubiquitin ligase that participates in a variety of cellular activities. In this study, we compared parkin-mutant primary fibroblasts, from a patient with parkin compound heterozygous mutations, to healthy control cells. Western blot analysis of proteins obtained from patient's fibroblasts showed quantitative differences of many proteins involved in the cytoskeleton organization with respect to control cells. These molecular alterations are accompanied by changes in the organization of actin stress fibers and biomechanical properties, as revealed by confocal laser scanning microscopy and atomic force microscopy. In particular, parkin deficiency is associated with a significant increase of Young's modulus of null-cells in comparison to normal fibroblasts. The current study proposes that parkin influences the spatial organization of actin filaments, the shape of human fibroblasts, and their elastic response to an external applied force.
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Affiliation(s)
- Daniele Vergara
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
- Laboratory of Clinical Proteomic, ''Giovanni Paolo II'' Hospital, ASL-Lecce, Italy
| | - Marzia M Ferraro
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
- Institute of Nanoscience-NNL, CNR, Via Arnesano, 16, Lecce, 73100, Italy
| | - Mariafrancesca Cascione
- Institute of Nanoscience-NNL, CNR, Via Arnesano, 16, Lecce, 73100, Italy
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Lecce, Italy
| | | | - Stefano Leporatti
- Institute of Nanoscience-NNL, CNR, Via Arnesano, 16, Lecce, 73100, Italy
| | - Anna Ferretta
- Department of Basic Medical Sciences, Neurosciences and Organs of Senses, University of Bari 'A. Moro', Bari, Italy
| | - Paola Tanzarella
- Department of Basic Medical Sciences, Neurosciences and Organs of Senses, University of Bari 'A. Moro', Bari, Italy
| | - Consiglia Pacelli
- Department of Pharmacology, Faculty of Medicine, Universitè de Montreal, 2900 Boulevard Edouard-Montpetit, Montreal, QC, H3T1J4, Canada
| | - Angelo Santino
- Institute of Science of Food Production, CNR, Lecce, Italy
| | - Michele Maffia
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
- Laboratory of Clinical Proteomic, ''Giovanni Paolo II'' Hospital, ASL-Lecce, Italy
| | - Tiziana Cocco
- Department of Basic Medical Sciences, Neurosciences and Organs of Senses, University of Bari 'A. Moro', Bari, Italy
| | - Ross Rinaldi
- Institute of Nanoscience-NNL, CNR, Via Arnesano, 16, Lecce, 73100, Italy
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Lecce, Italy
| | - Antonio Gaballo
- Institute of Nanoscience-NNL, CNR, Via Arnesano, 16, Lecce, 73100, Italy.
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21
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Pecorari I, Puzzi L, Sbaizero O. Atomic force microscopy and lamins: A review study towards future, combined investigations. Microsc Res Tech 2016; 80:97-108. [PMID: 27859883 DOI: 10.1002/jemt.22801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 09/21/2016] [Accepted: 10/20/2016] [Indexed: 12/13/2022]
Abstract
In the last decades, atomic force microscopy (AFM) underwent a rapid and stunning development, especially for studying mechanical properties of biological samples. The numerous discoveries relying to this approach, have increased the credit of AFM as a versatile tool, and potentially eligible as a diagnostic equipment. Meanwhile, it has become strikingly evident that lamins are involved on the onset and development of certain diseases, including cancer, Hutchinson-Gilford progeria syndrome, cardiovascular pathologies, and muscular dystrophy. A new category of pathologies has been defined, the laminopathies, which are caused by mutations in the gene encoding for A-type lamins. As the majority of medical issues, lamins, and all their related aspects can be considered as a quite complex problem. Indeed, there are many facets to explore, and this definitely requires a multidisciplinary approach. One of the most intriguing aspects concerning lamins is their remarkable contribute to cells mechanics. Over the years, this has led to the speculation of the so-called "structural hypothesis", which attempts to elucidate the etiology and some features of the laminopathies. Among the various techniques tried to figure out the role of lamins in the cells mechanics, the AFM has been already successfully applied, proving its versatility. Therefore, the present work aims both to highlight the qualities of AFM and to review the most relevant knowledge about lamins, in order to promote the study of the latter, taking advantage from the former. Microsc. Res. Tech. 80:97-108, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Ilaria Pecorari
- Department of Engineering and Architecture, University of Trieste, Via Valerio 6-34127, Trieste, Italy
| | - Luca Puzzi
- Department of Engineering and Architecture, University of Trieste, Via Valerio 6-34127, Trieste, Italy
| | - Orfeo Sbaizero
- Department of Engineering and Architecture, University of Trieste, Via Valerio 6-34127, Trieste, Italy
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22
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Medici S, Peana M, Crisponi G, Nurchi VM, Lachowicz JI, Remelli M, Zoroddu MA. Silver coordination compounds: A new horizon in medicine. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.05.015] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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23
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Ansardamavandi A, Tafazzoli-Shadpour M, Omidvar R, Jahanzad I. Quantification of effects of cancer on elastic properties of breast tissue by Atomic Force Microscopy. J Mech Behav Biomed Mater 2016; 60:234-242. [DOI: 10.1016/j.jmbbm.2015.12.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 12/09/2015] [Accepted: 12/21/2015] [Indexed: 10/22/2022]
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24
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Moreno-Cencerrado A, Iturri J, Pecorari I, D M Vivanco M, Sbaizero O, Toca-Herrera JL. Investigating cell-substrate and cell-cell interactions by means of single-cell-probe force spectroscopy. Microsc Res Tech 2016; 80:124-130. [PMID: 27341785 DOI: 10.1002/jemt.22706] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 06/02/2016] [Indexed: 11/08/2022]
Abstract
Cell adhesion forces are typically a mixture of specific and nonspecific cell-substrate and cell-cell interactions. In order to resolve these phenomena, Atomic Force Microscopy appears as a powerful device which can measure cell parameters by means of manipulation of single cells. This method, commonly known as cell-probe force spectroscopy, allows us to control the force applied, the area of interest, the approach/retracting speed, the force rate, and the time of interaction. Here, we developed a novel approach for in situ cantilever cell capturing and measurement of specific cell interactions. In particular, we present a new setup consisting of two different half-surfaces coated either with recrystallized SbpA bacterial cell surface layer proteins (S-layers) or integrin binding Fibronectin, on which MCF-7 breast cancer cells are incubated. The presence of a clear physical boundary between both surfaces benefits for a quick detection of the region under analysis. Thus, quantitative results about SbpA-cell and Fibronectin-cell adhesion forces as a function of the contact time are described. Additionally, the importance of the cell spreading in cell-cell interactions has been studied for surfaces coated with two different Fibronectin concentrations: 20 μg/mL (FN20) and 100 μg/mL (FN100), which impact the number of substrate receptors. Microsc. Res. Tech. 80:124-130, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Alberto Moreno-Cencerrado
- Department of Nanobiotechnology, Institute for Biophysics, University of Natural Resources and Life Sciences Vienna (BOKU), Muthgasse 11, Vienna, 1190, Austria
| | - Jagoba Iturri
- Department of Nanobiotechnology, Institute for Biophysics, University of Natural Resources and Life Sciences Vienna (BOKU), Muthgasse 11, Vienna, 1190, Austria
| | - Ilaria Pecorari
- Department of Engineering and Architecture, Università Degli Studi Di Trieste, via Valerio 6 - 34127, Trieste, Italy
| | - Maria D M Vivanco
- Cell Biology and Stem Cells Unit, CIC bioGUNE, Bizkaia Science and Technology Park, Derio, Spain
| | - Orfeo Sbaizero
- Department of Engineering and Architecture, Università Degli Studi Di Trieste, via Valerio 6 - 34127, Trieste, Italy
| | - José L Toca-Herrera
- Department of Nanobiotechnology, Institute for Biophysics, University of Natural Resources and Life Sciences Vienna (BOKU), Muthgasse 11, Vienna, 1190, Austria
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25
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Cascione M, de Matteis V, Rinaldi R, Leporatti S. Atomic force microscopy combined with optical microscopy for cells investigation. Microsc Res Tech 2016; 80:109-123. [DOI: 10.1002/jemt.22696] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 05/24/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Mariafrancesca Cascione
- Dipartimento di Matematica e Fisica “Ennio De Giorgi”; Università del Salento Via Monteroni; 73100 Lecce Italy
- Euromediterranean Center for Nanomaterial Modelling and Technology (ECMT) of Consiglio Nazionale delle Ricerche; Istituto Nanoscienze; Via Arnesano 16, Lecce Italy
| | - Valeria de Matteis
- Dipartimento di Matematica e Fisica “Ennio De Giorgi”; Università del Salento Via Monteroni; 73100 Lecce Italy
| | - Rosaria Rinaldi
- Dipartimento di Matematica e Fisica “Ennio De Giorgi”; Università del Salento Via Monteroni; 73100 Lecce Italy
- Euromediterranean Center for Nanomaterial Modelling and Technology (ECMT) of Consiglio Nazionale delle Ricerche; Istituto Nanoscienze; Via Arnesano 16, Lecce Italy
| | - Stefano Leporatti
- CNR Nantotec-Istituto di Nanotecnologia, Polo di Nanotecnologia c/o Campus Ecoteckne, Via Monteroni; 73100, Lecce Italy
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26
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Dong C, Hu X, Dinu CZ. Current status and perspectives in atomic force microscopy-based identification of cellular transformation. Int J Nanomedicine 2016; 11:2107-18. [PMID: 27274238 PMCID: PMC4876801 DOI: 10.2147/ijn.s103501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Understanding the complex interplay between cells and their biomechanics and how the interplay is influenced by the extracellular microenvironment, as well as how the transforming potential of a tissue from a benign to a cancerous one is related to the dynamics of both the cell and its surroundings, holds promise for the development of targeted translational therapies. This review provides a comprehensive overview of atomic force microscopy-based technology and its applications for identification of cellular progression to a cancerous phenotype. The review also offers insights into the advancements that are required for the next user-controlled tool to allow for the identification of early cell transformation and thus potentially lead to improved therapeutic outcomes.
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Affiliation(s)
- Chenbo Dong
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV, USA
| | - Xiao Hu
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV, USA
| | - Cerasela Zoica Dinu
- Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV, USA
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27
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Atomic force microscopy indentation and inverse analysis for non-linear viscoelastic identification of breast cancer cells. Math Biosci 2016; 277:77-88. [PMID: 27107978 DOI: 10.1016/j.mbs.2016.03.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 03/27/2016] [Accepted: 03/31/2016] [Indexed: 12/20/2022]
Abstract
Breast cancer cells (MCF-7 and MCF-10A) are studied through indentation with spherical borosilicate glass particles in atomic force microscopy (AFM) contact mode in fluid. Their mechanical properties are obtained by analyzing the recorded reaction force-time response. The analysis is based on comparing experimental data with predictions from finite element (FE) simulation. Here, FE modeling is employed to simulate the AFM indentation experiment which is neither a displacement nor a force controlled test. This approach is expected to overcome many underlying problems of the widely used models such as Hertz contact model due to its capability to capture the contact behaviors between the spherical indentor and the cell, account for cell geometry, and incorporate with large strain theory. In this work, a non-linear viscoelastic (NLV) model in which the viscoelastic part is described by Prony series terms is used for the constitutive model of the cells. The time-dependent material parameters are extracted through an inverse analysis with the use of a surrogate model based on a Kriging estimator. The purpose is to automatically extract the NLV properties of the cells with a more efficient process compared to the iterative inverse technique that has been mostly applied in the literature. The method also allows the use of FE modeling in the analysis of a large amount of experimental data. The NLV parameters are compared between MCF-7 and MCF-10A and MCF-10A treated and untreated with the drug Cytochalasin D to examine the possibility of using relaxation properties as biomarkers for distinguishing these types of breast cancer cells. The comparisons indicate that malignant cells (MCF-7) are softer and exhibit more relaxation than benign cells (MCF-10A). Disrupting the cytoskeleton using the drug Cytochalasin D also results in a larger amount of relaxation in the cell's response. In addition, relaxation properties indicate larger differences as compared to the elastic moduli like instantaneous shear modulus. These results may be useful for disease diagnosing purposes.
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28
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Coceano G, Yousafzai MS, Ma W, Ndoye F, Venturelli L, Hussain I, Bonin S, Niemela J, Scoles G, Cojoc D, Ferrari E. Investigation into local cell mechanics by atomic force microscopy mapping and optical tweezer vertical indentation. NANOTECHNOLOGY 2016; 27:065102. [PMID: 26683826 DOI: 10.1088/0957-4484/27/6/065102] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Investigating the mechanical properties of cells could reveal a potential source of label-free markers of cancer progression, based on measurable viscoelastic parameters. The Young's modulus has proved to be the most thoroughly studied so far, however, even for the same cell type, the elastic modulus reported in different studies spans a wide range of values, mainly due to the application of different experimental conditions. This complicates the reliable use of elasticity for the mechanical phenotyping of cells. Here we combine two complementary techniques, atomic force microscopy (AFM) and optical tweezer microscopy (OTM), providing a comprehensive mechanical comparison of three human breast cell lines: normal myoepithelial (HBL-100), luminal breast cancer (MCF-7) and basal breast cancer (MDA-MB-231) cells. The elastic modulus was measured locally by AFM and OTM on single cells, using similar indentation approaches but different measurement parameters. Peak force tapping AFM was employed at nanonewton forces and high loading rates to draw a viscoelastic map of each cell and the results indicated that the region on top of the nucleus provided the most meaningful results. OTM was employed at those locations at piconewton forces and low loading rates, to measure the elastic modulus in a real elastic regime and rule out the contribution of viscous forces typical of AFM. When measured by either AFM or OTM, the cell lines' elasticity trend was similar for the aggressive MDA-MB-231 cells, which were found to be significantly softer than the other two cell types in both measurements. However, when comparing HBL-100 and MCF-7 cells, we found significant differences only when using OTM.
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Affiliation(s)
- G Coceano
- CNR-IOM National Research Council-Institute of Materials, Area Science Park, Basovizza, S.S. 14, Km 163.5, 34149 Trieste, Italy. Università degli studi di Trieste, Piazzale Europa 1, 34128 Trieste, Italy
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29
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Single-Cell Mechanical Properties: Label-Free Biomarkers for Cell Status Evaluation. SERIES IN BIOENGINEERING 2016. [DOI: 10.1007/978-3-662-49118-8_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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30
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Li Q, Xiao L, Harihar S, Welch DR, Vargis E, Zhou A. In vitro biophysical, microspectroscopic and cytotoxic evaluation of metastatic and non-metastatic cancer cells in responses to anti-cancer drug. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2015; 7:10162-10169. [PMID: 26744605 PMCID: PMC4699680 DOI: 10.1039/c5ay01810b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The Breast Cancer Metastasis Suppressor 1 (BRMS1) is a nucleo-cytoplasmic protein that suppresses cancer metastasis without affecting the growth of the primary tumor. Previous work has shown that it decreases the expression of protein mediators involved in chemoresistance. This study measured the biomechanical and biochemical changes in BRMS1 expression and the responses of BRMS1 to drug treatments on cancer cells in vitro. The results show that BRMS1 expression affects biomechanical properties by decreasing the Young's modulus and adhesion force of breast cancer cells after doxorubicin (DOX) exposure. Raman spectral bands corresponding to DNA/RNA, lipids and proteins were similar for all cells after DOX treatment. The expression of cytokines were similar for cancer cells after DOX exposure, although BRMS1 expression had different effects on the secretion of cytokines for breast cancer cells. The absence of significant changes on apoptosis, reactive oxygen species (ROS) expression and cell viability after BRMS1 expression shows that BRMS1 has little effect on cellular chemoresistance. Analyzing cancer protein expression is critical in evaluating therapeutics. Our study may provide evidence of the benefit of metastatic suppressor expression before chemotherapy.
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Affiliation(s)
- Qifei Li
- Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
| | - Lifu Xiao
- Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
| | - Sitaram Harihar
- Department of Cancer Biology, The University of Kansas Medical Center and The University of Kansas Cancer Center, Kansas City, KS 66160, USA
| | - Danny R. Welch
- Department of Cancer Biology, The University of Kansas Medical Center and The University of Kansas Cancer Center, Kansas City, KS 66160, USA
| | - Elizabeth Vargis
- Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
| | - Anhong Zhou
- Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
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31
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Vergara D, Simeone P, Latorre D, Cascione F, Leporatti S, Trerotola M, Giudetti AM, Capobianco L, Lunetti P, Rizzello A, Rinaldi R, Alberti S, Maffia M. Proteomics analysis of E-cadherin knockdown in epithelial breast cancer cells. J Biotechnol 2015; 202:3-11. [DOI: 10.1016/j.jbiotec.2014.10.034] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 10/06/2014] [Accepted: 10/14/2014] [Indexed: 12/31/2022]
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32
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Silver(I) compounds of the anti-inflammatory agents salicylic acid and p-hydroxyl-benzoic acid which modulate cell function. J Inorg Biochem 2015; 142:132-44. [DOI: 10.1016/j.jinorgbio.2014.10.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Revised: 10/15/2014] [Accepted: 10/15/2014] [Indexed: 12/30/2022]
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33
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Omidvar R, Tafazzoli-shadpour M, Shokrgozar MA, Rostami M. Atomic force microscope-based single cell force spectroscopy of breast cancer cell lines: An approach for evaluating cellular invasion. J Biomech 2014; 47:3373-9. [DOI: 10.1016/j.jbiomech.2014.08.002] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 07/27/2014] [Accepted: 08/01/2014] [Indexed: 01/19/2023]
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34
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Wang Z, Hao F, Ding C, Yang Z, Shang P. Effects of static magnetic field on cell biomechanical property and membrane ultrastructure. Bioelectromagnetics 2014; 35:251-61. [DOI: 10.1002/bem.21847] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Accepted: 01/26/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Zhe Wang
- Key Laboratory for Space Biosciences and Biotechnology; Institute of Special Environmental Biophysics; School of Life Sciences; Northwestern Polytechnical University; Xi'an People's Republic of China
| | - Fengtao Hao
- Key Laboratory for Space Biosciences and Biotechnology; Institute of Special Environmental Biophysics; School of Life Sciences; Northwestern Polytechnical University; Xi'an People's Republic of China
| | - Chong Ding
- Key Laboratory for Space Biosciences and Biotechnology; Institute of Special Environmental Biophysics; School of Life Sciences; Northwestern Polytechnical University; Xi'an People's Republic of China
| | - Zhouqi Yang
- Key Laboratory for Space Biosciences and Biotechnology; Institute of Special Environmental Biophysics; School of Life Sciences; Northwestern Polytechnical University; Xi'an People's Republic of China
| | - Peng Shang
- Key Laboratory for Space Biosciences and Biotechnology; Institute of Special Environmental Biophysics; School of Life Sciences; Northwestern Polytechnical University; Xi'an People's Republic of China
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35
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Vergara D, Simeone P, del Boccio P, Toto C, Pieragostino D, Tinelli A, Acierno R, Alberti S, Salzet M, Giannelli G, Sacchetta P, Maffia M. Comparative proteome profiling of breast tumor cell lines by gel electrophoresis and mass spectrometry reveals an epithelial mesenchymal transition associated protein signature. MOLECULAR BIOSYSTEMS 2014; 9:1127-38. [PMID: 23247860 DOI: 10.1039/c2mb25401h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The epithelial to mesenchymal transition (EMT) is a cellular program associated with the organ morphogenesis but also with the disease progression. EMT in the cancer field fuels neoplastic progression promoting the resistance to cell death, the resistance to chemotherapy and the acquisition of stem cell properties. Considering the crucial role of EMT in breast cancer metastasis, a better understanding of this process may provide new therapeutic options. Here, by using a proteomic approach we identified a set of proteins differentially expressed between an epithelial and a mesenchymal breast cancer cell line. The protein-protein network of these identified proteins was determined by an in silico analysis highlighting, in the EMT program, the role of proteins involved in cell adhesion, migration, and invasion, together with protein kinases involved in proliferation and survival, with many of these emerging as possible targets of novel biological agents. Finally, the pharmacological inhibition of some of these kinases was able to reverse the mesenchymal phenotype to an epithelial phenotype.
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Affiliation(s)
- Daniele Vergara
- Laboratory of General Physiology, Department of Biological and Environmental Sciences and Technologies, University of Salento, via Monteroni 73100, Lecce, Italy
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36
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Banti CN, Giannoulis AD, Kourkoumelis N, Owczarzak AM, Kubicki M, Hadjikakou SK. Novel metallo-therapeutics of the NSAID naproxen. Interaction with intracellular components that leads the cells to apoptosis. Dalton Trans 2014; 43:6848-63. [DOI: 10.1039/c3dt53175a] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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37
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Pillet F, Chopinet L, Formosa C, Dague E. Atomic Force Microscopy and pharmacology: from microbiology to cancerology. Biochim Biophys Acta Gen Subj 2013; 1840:1028-50. [PMID: 24291690 DOI: 10.1016/j.bbagen.2013.11.019] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 11/18/2013] [Accepted: 11/20/2013] [Indexed: 02/06/2023]
Abstract
BACKGROUND Atomic Force Microscopy (AFM) has been extensively used to study biological samples. Researchers take advantage of its ability to image living samples to increase our fundamental knowledge (biophysical properties/biochemical behavior) on living cell surface properties, at the nano-scale. SCOPE OF REVIEW AFM, in the imaging modes, can probe cells morphological modifications induced by drugs. In the force spectroscopy mode, it is possible to follow the nanomechanical properties of a cell and to probe the mechanical modifications induced by drugs. AFM can be used to map single molecule distribution at the cell surface. We will focus on a collection of results aiming at evaluating the nano-scale effects of drugs, by AFM. Studies on yeast, bacteria and mammal cells will illustrate our discussion. Especially, we will show how AFM can help in getting a better understanding of drug mechanism of action. MAJOR CONCLUSIONS This review demonstrates that AFM is a versatile tool, useful in pharmacology. In microbiology, it has been used to study the drugs fighting Candida albicans or Pseudomonas aeruginosa. The major conclusions are a better understanding of the microbes' cell wall and of the drugs mechanism of action. In cancerology, AFM has been used to explore the effects of cytotoxic drugs or as an innovative diagnostic technology. AFM has provided original results on cultured cells, cells extracted from patient and directly on patient biopsies. GENERAL SIGNIFICANCE This review enhances the interest of AFM technologies for pharmacology. The applications reviewed range from microbiology to cancerology.
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Affiliation(s)
- Flavien Pillet
- CNRS, LAAS, 7 avenue du colonel Roche, F-31077 Toulouse Cedex 4, France; Université de Toulouse, UPS, INSA, INP, ISAE, UT1, UTM, LAAS, ITAV, F-31077 Toulouse Cedex 4, France
| | - Louise Chopinet
- CNRS, IPBS-UMR 5089, BP64182, 205 route de Narbonne, F-31077 Toulouse Cedex 4, France; Université de Toulouse, UPS, INSA, INP, ISAE, UT1, UTM, LAAS, ITAV, F-31077 Toulouse Cedex 4, France
| | - Cécile Formosa
- CNRS, LAAS, 7 avenue du colonel Roche, F-31077 Toulouse Cedex 4, France; Université de Toulouse, UPS, INSA, INP, ISAE, UT1, UTM, LAAS, ITAV, F-31077 Toulouse Cedex 4, France; CNRS, UMR 7565, SRSMC, Vandoeuvre-lès-Nancy, France; Université de Lorraine, UMR 7565, Faculté de Pharmacie, Nancy, France
| | - Etienne Dague
- CNRS, LAAS, 7 avenue du colonel Roche, F-31077 Toulouse Cedex 4, France; Université de Toulouse, UPS, INSA, INP, ISAE, UT1, UTM, LAAS, ITAV, F-31077 Toulouse Cedex 4, France; CNRS; ITAV-USR 3505; F31106 Toulouse, France.
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38
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Tang M, Li Q, Xiao L, Li Y, Jensen JL, Liou TG, Zhou A. Toxicity effects of short term diesel exhaust particles exposure to human small airway epithelial cells (SAECs) and human lung carcinoma epithelial cells (A549). Toxicol Lett 2012; 215:181-92. [PMID: 23124088 PMCID: PMC7920584 DOI: 10.1016/j.toxlet.2012.10.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 10/22/2012] [Accepted: 10/24/2012] [Indexed: 11/28/2022]
Abstract
In this study, confocal Raman spectroscopy, atomic force microscope (AFM) and multiplex ELISA were applied to analyze the biophysical responses (biomechanics and biospectroscopy) of normal human primary small airway epithelial cells (SAECs) and human lung carcinoma epithelial A549 cells to in vitro short term DEP exposure (up to 2h). Raman spectra revealed the specific cellular biomolecular changes in cells induced by DEP compared to unexposed control cells. Principal component analysis was successfully applied to analyze spectral differences between control and treated groups from multiple individual cells, and indicated that cell nuclei are more sensitive than other cell locations. AFM measurements indicated that 2h of DEP exposure induced a significant decrease in cell elasticity and a dramatic change in membrane surface adhesion force. Cytokine and chemokine production measured by multiplex ELISA demonstrated DEP-induced inflammatory responses in both cell types.
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Affiliation(s)
- Mingjie Tang
- Department of Biological Engineering, Utah State University, Logan, UT, USA
| | - Qifei Li
- Department of Biological Engineering, Utah State University, Logan, UT, USA
| | - Lifu Xiao
- Department of Biological Engineering, Utah State University, Logan, UT, USA
| | - Yanping Li
- Division of Respiratory, Critical Care and Occupational Pulmonary Medicine, Department of Medicine, School of Medicine, University of Utah, Salt Lake City, UT, USA
| | - Judy L. Jensen
- Division of Respiratory, Critical Care and Occupational Pulmonary Medicine, Department of Medicine, School of Medicine, University of Utah, Salt Lake City, UT, USA
| | - Theodore G. Liou
- Division of Respiratory, Critical Care and Occupational Pulmonary Medicine, Department of Medicine, School of Medicine, University of Utah, Salt Lake City, UT, USA
| | - Anhong Zhou
- Department of Biological Engineering, Utah State University, Logan, UT, USA
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39
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Fuhs T, Reuter L, Vonderhaid I, Claudepierre T, Käs JA. Inherently slow and weak forward forces of neuronal growth cones measured by a drift-stabilized atomic force microscope. Cytoskeleton (Hoboken) 2012; 70:44-53. [DOI: 10.1002/cm.21080] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Accepted: 09/16/2012] [Indexed: 12/11/2022]
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40
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Boccaccio A, Frassanito MC, Lamberti L, Brunelli R, Maulucci G, Monaci M, Papi M, Pappalettere C, Parasassi T, Sylla L, Ursini F, De Spirito M. Nanoscale characterization of the biomechanical hardening of bovine zona pellucida. J R Soc Interface 2012; 9:2871-82. [PMID: 22675161 DOI: 10.1098/rsif.2012.0269] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The zona pellucida (ZP) is an extracellular membrane surrounding mammalian oocytes. The so-called zona hardening plays a key role in fertilization process, as it blocks polyspermy, which may also be caused by an increase in the mechanical stiffness of the ZP membrane. However, structural reorganization mechanisms leading to ZP's biomechanical hardening are not fully understood yet. Furthermore, a correct estimate of the elastic properties of the ZP is still lacking. Therefore, the aim of the present study was to investigate the biomechanical behaviour of ZP membranes extracted from mature and fertilized bovine oocytes to better understand the mechanisms involved in the structural reorganization of the ZP that may lead to the biomechanical hardening of the ZP. For that purpose, a hybrid procedure is developed by combining atomic force microscopy nanoindentation measurements, nonlinear finite element analysis and nonlinear optimization. The proposed approach allows us to determine the biomechanical properties of the ZP more realistically than the classical analysis based on Hertz's contact theory, as it accounts for the nonlinearity of finite indentation process, hyperelastic behaviour and material heterogeneity. Experimental results show the presence of significant biomechanical hardening induced by the fertilization process. By comparing various hyperelastic constitutive models, it is found that the Arruda-Boyce eight-chain model best describes the biomechanical response of the ZP. Fertilization leads to an increase in the degree of heterogeneity of membrane elastic properties. The Young modulus changes sharply within a superficial layer whose thickness is related to the characteristic distance between cross-links in the ZP filamentous network. These findings support the hypothesis that biomechanical hardening of bovine ZP is caused by an increase in the number of inter-filaments cross-links whose density should be higher in the ZP inner side.
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Affiliation(s)
- Antonio Boccaccio
- Dipartimento di Ingegneria Meccanica e Gestionale, Politecnico di Bari, , Bari 70126, Italy
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41
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Shpakovsky DB, Banti CN, Beaulieu-Houle G, Kourkoumelis N, Manoli M, Manos MJ, Tasiopoulos AJ, Hadjikakou SK, Milaeva ER, Charalabopoulos K, Bakas T, Butler IS, Hadjiliadis N. Synthesis, structural characterization and in vitro inhibitory studies against human breast cancer of the bis-(2,6-di-tert-butylphenol)tin(iv) dichloride and its complexes. Dalton Trans 2012; 41:14568-82. [DOI: 10.1039/c2dt31527k] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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42
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Nogueira DR, Mitjans M, Infante MR, Vinardell MP. Comparative sensitivity of tumor and non-tumor cell lines as a reliable approach for in vitro cytotoxicity screening of lysine-based surfactants with potential pharmaceutical applications. Int J Pharm 2011; 420:51-8. [PMID: 21871545 DOI: 10.1016/j.ijpharm.2011.08.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 08/08/2011] [Accepted: 08/10/2011] [Indexed: 10/17/2022]
Abstract
Surfactants are used as additives in topical pharmaceuticals and drug delivery systems. The biocompatibility of amino acid-based surfactants makes them highly suitable for use in these fields, but tests are needed to evaluate their potential toxicity. Here we addressed the sensitivity of tumor (HeLa, MCF-7) and non-tumor (3T3, 3T6, HaCaT, NCTC 2544) cell lines to the toxic effects of lysine-based surfactants by means of two in vitro endpoints (MTT and NRU). This comparative assay may serve as a reliable approach for predictive toxicity screening of chemicals prior to pharmaceutical applications. After 24-h of cell exposure to surfactants, differing toxic responses were observed. NCTC 2544 and 3T6 cell lines were the most sensitive, while both tumor cells and 3T3 fibroblasts were more resistant to the cytotoxic effects of surfactants. IC(50)-values revealed that cytotoxicity was detected earlier by MTT assay than by NRU assay, regardless of the compound or cell line. The overall results showed that surfactants with organic counterions were less cytotoxic than those with inorganic counterions. Our findings highlight the relevance of the correct choice and combination of cell lines and bioassays in toxicity studies for a safe and reliable screen of chemicals with potential interest in pharmaceutical industry.
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Affiliation(s)
- Daniele Rubert Nogueira
- Departament de Fisiologia, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII s/n, E-08028 Barcelona, Spain
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Drug-loaded polyelectrolyte microcapsules for sustained targeting of cancer cells. Adv Drug Deliv Rev 2011; 63:847-64. [PMID: 21620912 DOI: 10.1016/j.addr.2011.05.007] [Citation(s) in RCA: 162] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2011] [Revised: 04/28/2011] [Accepted: 05/07/2011] [Indexed: 12/17/2022]
Abstract
In this review we will overview novel nanotechnological nanocarrier systems for cancer therapy focusing on recent development in polyelectrolyte capsules for targeted delivery of antineoplastic drugs against cancer cells. Biodegradable polyelectrolyte microcapsules (PMCs) are supramolecular assemblies of particular interest for therapeutic purposes, as they can be enzymatically degraded into viable cells, under physiological conditions. Incorporation of small bioactive molecules into nano-to-microscale delivery systems may increase drug's bioavailability and therapeutic efficacy at single cell level giving desirable targeted therapy. Layer-by-layer (LbL) self-assembled PMCs are efficient microcarriers that maximize drug's exposure enhancing antitumor activity of neoplastic drug in cancer cells. They can be envisaged as novel multifunctional carriers for resistant or relapsed patients or for reducing dose escalation in clinical settings.
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Colbert MJ, Brochard-Wyart F, Fradin C, Dalnoki-Veress K. Squeezing and detachment of living cells. Biophys J 2011; 99:3555-62. [PMID: 21112279 DOI: 10.1016/j.bpj.2010.10.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 10/03/2010] [Accepted: 10/06/2010] [Indexed: 01/16/2023] Open
Abstract
The interaction of living cells with their environment is linked to their adhesive and elastic properties. Even if the mechanics of simple lipid membranes is fairly well understood, the analysis of single cell experiments remains challenging in part because of the mechanosensory response of cells to their environment. To study the mechanical properties of living cells we have developed a tool that borrows from micropipette aspiration techniques, atomic force microscopy, and the classical Johnson-Kendall-Roberts test. We show results from a study of the adhesion properties of living cells, as well as the elastic response and relaxation. We present models that are applied throughout the different stages of an experiment, which indicate that the contribution of the different components of the cell are active at various stages of compression, retraction, and detachment. Finally, we present a model that attempts to elucidate the surprising logarithmic relaxation observed when the cell is subjected to a given deformation.
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Affiliation(s)
- Marie-Josée Colbert
- Department of Physics & Astronomy and the Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario, Canada
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Hur SC, Henderson-MacLennan NK, McCabe ERB, Di Carlo D. Deformability-based cell classification and enrichment using inertial microfluidics. LAB ON A CHIP 2011; 11:912-20. [PMID: 21271000 DOI: 10.1039/c0lc00595a] [Citation(s) in RCA: 335] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The ability to detect and isolate rare target cells from heterogeneous samples is in high demand in cell biology research, immunology, tissue engineering and medicine. Techniques allowing label-free cell enrichment or detection are especially important to reduce the complexity and costs towards clinical applications. Single-cell deformability has recently been recognized as a unique label-free biomarker for cell phenotype with implications for assessment of cancer invasiveness. Using a unique combination of fluid dynamic effects in a microfluidic system, we demonstrate high-throughput continuous label-free cell classification and enrichment based on cell size and deformability. The system takes advantage of a balance between deformability-induced and inertial lift forces as cells travel in a microchannel flow. Particles and droplets with varied elasticity and viscosity were found to have separate lateral dynamic equilibrium positions due to this balance of forces. We applied this system to successfully classify various cell types using cell size and deformability as distinguishing markers. Furthermore, using differences in dynamic equilibrium positions, we adapted the system to conduct passive, label-free and continuous cell enrichment based on these markers, enabling off-chip sample collection without significant gene expression changes. The presented method has practical potential for high-throughput deformability measurements and cost-effective cell separation to obtain viable target cells of interest in cancer research, immunology, and regenerative medicine.
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Affiliation(s)
- Soojung Claire Hur
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
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Nikkhah M, Strobl JS, Schmelz EM, Agah M. Evaluation of the influence of growth medium composition on cell elasticity. J Biomech 2010; 44:762-6. [PMID: 21109247 DOI: 10.1016/j.jbiomech.2010.11.002] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Revised: 10/29/2010] [Accepted: 11/01/2010] [Indexed: 11/25/2022]
Abstract
Recently, there has been an increasing interest in using the biomechanical properties of cells as biomarkers to discriminate between normal and cancerous cells. However, few investigators have considered the influence of the growth medium composition when evaluating the biomechanical properties of the normal and diseased cells. In this study, we investigated the variation in Young's modulus of non-malignant MCF10A and malignant MDA-MB-231 breast cells seeded in five different growth media under controlled experimental conditions. The average Young's modulus of MDA-MB-231 cells was significantly lower (p<0.0001) than the mean Young's modulus of MCF10A cells when compared in identical medium compositions. However, we found that growth medium composition affected the elasticity of MCF10A and MDA-MB-231 cells. The average Young's modulus of both cell lines decreased by 10-18% when the serum was reduced from 10% to 5% and upon addition of epidermal growth factor (EGF, 20 ng/ml) to the medium. Though these elasticity changes might have some biological impact, none was statistically significant. However, the elasticity of MCF10A was significantly more responsive than MDA-MB-231 cells to the medium composition supplemented with EGF, cholera toxin (CT), insulin (INS) and hydrocortisone (HC), which are recommended for routine cultivation of MCF10A cells (M5). MCF10A cells were significantly softer (p<0.002) when grown in medium M5 compared to a standard MDA-MB-231 medium (M1). The investigation of the effects of culture medium composition on the elastic properties of cells highlights the need to take these effects into consideration when interpreting elasticity measurements in cells grown in different media.
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Affiliation(s)
- Mehdi Nikkhah
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061, USA.
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Moreno-Flores S, Benitez R, Vivanco MDM, Toca-Herrera JL. Stress relaxation and creep on living cells with the atomic force microscope: a means to calculate elastic moduli and viscosities of cell components. NANOTECHNOLOGY 2010; 21:445101. [PMID: 20921592 DOI: 10.1088/0957-4484/21/44/445101] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
In this work we present a unified method to study the mechanical properties of cells using the atomic force microscope. Stress relaxation and creep compliance measurements permitted us to determine, the relaxation times, the Young moduli and the viscosity of breast cancer cells (MCF-7). The results show that the mechanical behaviour of MCF-7 cells responds to a two-layered model of similar elasticity but differing viscosity. Treatment of MCF-7 cells with an actin-depolymerising agent results in an overall decrease in both cell elasticity and viscosity, however to a different extent for each layer. The layer that undergoes the smaller decrease (36-38%) is assigned to the cell membrane/cortex while the layer that experiences the larger decrease (70-80%) is attributed to the cell cytoplasm. The combination of the method presented in this work, together with the approach based on stress relaxation microscopy (Moreno-Flores et al 2010 J. Biomech. 43 349-54), constitutes a unique AFM-based experimental framework to study cell mechanics. This methodology can also be extended to study the mechanical properties of biomaterials in general.
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Affiliation(s)
- Susana Moreno-Flores
- Biosurfaces Unit, CIC BiomaGUNE, Paseo Miramón 182, E-20009 San Sebastián-Donostia, Spain
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Medine EI, Odaci D, Gacal BN, Gacal B, Sakarya S, Unak P, Timur S, Yagci Y. A new approach for in vitro imaging of breast cancer cells by anti-metadherin targeted PVA-pyrene. Macromol Biosci 2010; 10:657-63. [PMID: 20336700 DOI: 10.1002/mabi.201000009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Poly(vinyl alcohol)-pyrene-anti-metadherin (PVA-Py-(Anti-MTDH)), a novel antibody based water soluble probe containing both fluorescent and target sites in the structure for in vitro imaging of breast cancer cells is reported here. Since breast cancer cells have an excess of MDTH protein expressed on the surface, a PVA-Py prepared by "Click chemistry" approach is targeted by Anti-MTDH antibody and applied to the MCF-7 cell line. After characterization, the designed architecture was evaluated in terms of cell incorporation efficiency and compared with a non-targeted structure (PVA-Py). Atomic force microscopy (AFM) and fluorescence microscopy images of cells after incubation of the probe molecules were also obtained to monitor the interaction of the probes with the cancerous cells.
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Affiliation(s)
- E Ilker Medine
- Division of Nuclear Chemistry, Department of Chemistry, Faculty of Science, Ege University, Bornova, 35100 Izmir, Turkey
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49
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Real-time monitoring of copper ions-induced cytotoxicity by EIS cell chips. Biosens Bioelectron 2010; 25:2711-6. [DOI: 10.1016/j.bios.2010.04.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Revised: 04/02/2010] [Accepted: 04/21/2010] [Indexed: 11/22/2022]
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50
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Vergara D, Martignago R, Leporatti S, Bonsegna S, Maruccio G, De Nuccio F, Santino A, Cingolani R, Nicolardi G, Maffia M, Rinaldi R. Biomechanical and proteomic analysis of INF- beta-treated astrocytes. NANOTECHNOLOGY 2009; 20:455106. [PMID: 19834248 DOI: 10.1088/0957-4484/20/45/455106] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Astrocytes have a key role in the pathogenesis of several diseases including multiple sclerosis and were proposed as the designed target for immunotherapy. In this study we used atomic force microscopy (AFM) and proteomics methods to analyse and correlate the modifications induced in the viscoleastic properties of astrocytes to the changes induced in protein expression after interferon- beta (IFN-beta) treatment. Our results indicated that IFN-beta treatment resulted in a significant decrease in the Young's modulus, a measure of cell elasticity, in comparison with control cells. The molecular mechanisms that trigger these changes were investigated by 2DE (two-dimensional electrophoresis) and confocal analyses and confirmed by western blotting. Altered proteins were found to be involved in cytoskeleton organization and other important physiological processes.
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Affiliation(s)
- Daniele Vergara
- National Nanotechnology Laboratory of CNR-INFM, ISUFI, University of Lecce, Italian Institute of Technology Research Unit, via Arnesano, Lecce I-73100, Italy
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