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Chvalova V, Vomastek T, Grousl T. Comparison of holotomographic microscopy and coherence-controlled holographic microscopy. J Microsc 2024; 294:5-13. [PMID: 38196346 DOI: 10.1111/jmi.13260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/18/2023] [Accepted: 12/26/2023] [Indexed: 01/11/2024]
Abstract
Quantitative phase imaging (QPI) is a powerful tool for label-free visualisation of living cells. Here, we compare two QPI microscopes - the Telight Q-Phase microscope and the Nanolive 3D Cell Explorer-fluo microscope. Both systems provide unbiased information about cell morphology, such as individual cell dry mass, perimeter and area. The Q-Phase microscope uses artefact-free, coherence-controlled holographic imaging technology to visualise cells in real time with minimal phototoxicity. The 3D Cell Explorer-fluo employs laser-based holotomography to reconstruct 3D images of living cells, visualising their internal structures and dynamics. Here, we analysed the strengths and limitations of both microscopes when examining two morphologically distinct cell lines - the cuboidal epithelial MDCK cells which form multicellular clusters and solitary growing Rat2 fibroblasts. We focus mainly on the ability of the devices to generate images suitable for single-cell segmentation by the built-in software, and we discuss the segmentation results and quantitative data generated from the segmented images. We show that both microscopes offer slightly different advantages, and the choice between them depends on the specific requirements and goals of the user.
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Affiliation(s)
- Vera Chvalova
- Laboratory of Cell Signalling, Institute of Microbiology of the Czech Academy of Sciences, Prague, Czech Republic
- Faculty of Science, Department of Cell Biology, Charles University, Prague, Czech Republic
| | - Tomas Vomastek
- Laboratory of Cell Signalling, Institute of Microbiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Tomas Grousl
- Laboratory of Cell Signalling, Institute of Microbiology of the Czech Academy of Sciences, Prague, Czech Republic
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Chvalova V, Venkadasubramanian V, Klimova Z, Vojtova J, Benada O, Vanatko O, Vomastek T, Grousl T. Characterization of RACK1-depleted mammalian cells by a palette of microscopy approaches reveals defects in cell cycle progression and polarity establishment. Exp Cell Res 2023:113695. [PMID: 37393981 DOI: 10.1016/j.yexcr.2023.113695] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 06/08/2023] [Accepted: 06/22/2023] [Indexed: 07/04/2023]
Abstract
The Receptor for Activated C Kinase 1 (RACK1) is an evolutionarily conserved scaffold protein involved in the regulation of numerous cellular processes. Here, we used CRISPR/Cas9 and siRNA to reduce the expression of RACK1 in Madin-Darby Canine Kidney (MDCK) epithelial cells and Rat2 fibroblasts, respectively. RACK1-depleted cells were examined using coherence-controlled holographic microscopy, immunofluorescence, and electron microscopy. RACK1 depletion resulted in decreased cell proliferation, increased cell area and perimeter, and in the appearance of large binucleated cells suggesting a defect in the cell cycle progression. Our results show that the depletion of RACK1 has a pleiotropic effect on both epithelial and mesenchymal cell lines and support its essential role in mammalian cells.
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Affiliation(s)
- Vera Chvalova
- Laboratory of Cell Signalling, Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 00, Prague, Czech Republic; Faculty of Science, Charles University, 128 00, Prague, Czech Republic
| | - Vignesh Venkadasubramanian
- Laboratory of Cell Signalling, Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 00, Prague, Czech Republic; Faculty of Science, Charles University, 128 00, Prague, Czech Republic
| | - Zuzana Klimova
- Laboratory of Cell Signalling, Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 00, Prague, Czech Republic
| | - Jana Vojtova
- Laboratory of Regulation of Gene Expression, Institute of Microbiology of the Czech Academy of Sciences, 142 00, Prague, Czech Republic
| | - Oldrich Benada
- Laboratory of Molecular Structure Characterization, Institute of Microbiology of the Czech Academy of Sciences, 142 00, Prague, Czech Republic
| | - Ondrej Vanatko
- Department of Cellular Neurophysiology, Institute of Experimental Medicine of the Czech Academy of Sciences, 142 00, Prague, Czech Republic; Second Faculty of Medicine, Charles University, 150 06, Prague, Czech Republic
| | - Tomas Vomastek
- Laboratory of Cell Signalling, Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 00, Prague, Czech Republic
| | - Tomas Grousl
- Laboratory of Cell Signalling, Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 00, Prague, Czech Republic.
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Bun T, Sato Y, Futami H, Tagawa Y, Murakami Y, Takahashi M. Cytoskeletal fractionation identifies LMO7 as a positive regulator of fibroblast polarization and directed migration. Biochem Biophys Res Commun 2023; 638:58-65. [PMID: 36442233 DOI: 10.1016/j.bbrc.2022.11.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 11/16/2022] [Indexed: 11/21/2022]
Abstract
Cell migration is a cytoskeleton-driven cellular process involved in physiological and pathological events such as embryonic development and cancer metastasis. Fibroblasts have often been used to elucidate the mechanism of cell migration due to their high morphological polarity and migratory activity. We recently reported that human lung fibroblasts migrate straight for a long duration without external stimuli, which phenomenon we named intrinsic and directed migration (IDM) of fibroblasts. In this study, we explored proteins involved in IDM in order to elucidate the molecular mechanism. First, we focused on the differences in morphology and migratory behaviors between normal and immortalized fibroblasts-the former exhibit obvious polarity and IDM; the latter exhibit poorly polarized morphology and random migration. We compared the abundance of proteins functioning as the cytoskeletal components between them through proteomic analysis and found that LIM domain only protein 7 (LMO7) is overwhelmingly incorporated into the cytoskeletons of normal fibroblasts. Depletion of LMO7 inhibited the directed migration of normal fibroblast on the fibronectin (FN)-rich surface, suggesting that LMO7 is important for IDM. Moreover, on the FN-free surface, LMO7-depleted fibroblasts often failed to establish morphological polarity and hardly migrated. Thus, the present study identified LMO7 as a positive regulator of fibroblast polarization and IDM, especially in an environment where integrin-mediated substrate attachment is insufficient.
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Affiliation(s)
- Taichi Bun
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Yuta Sato
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.
| | - Hajime Futami
- Department of Chemistry, School of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Yuki Tagawa
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Yota Murakami
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-8628, Japan; Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan; Department of Chemistry, School of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Masayuki Takahashi
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-8628, Japan; Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan; Department of Chemistry, School of Science, Hokkaido University, Sapporo, 060-0810, Japan.
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Li Y, He L, Chen J, Wang J, Zhao S, Liu X, Guo X, Wu Y, Shen X, Li C. 3d oxidized alginate-porcine liver acellular collagen droplets for tumor microenvironment mimicking. Int J Biol Macromol 2022; 215:665-674. [PMID: 35777510 DOI: 10.1016/j.ijbiomac.2022.06.169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 06/19/2022] [Accepted: 06/26/2022] [Indexed: 11/05/2022]
Abstract
The traditional 2d culture has been proved inferior to reproduce the subtle interaction between cell-to-cell and cell-to-extracellular matrix (ECM) in tumor microenvironment (TME) and collagen in ECM contributes to various malignancies of tumors. Hence, the 3d model contained with collagen may overcome the shortcomings of 2d culture. In this study, the in vitro TME mimicking matrix was prepared by coupling porcine liver-derived collagen (COL) and the dialdehyde group of partially oxidized alginate (OA), namely OA-COL, and the 3d OA-COL droplets were polymerized by divalent calcium ions. In the 3d OA-COL droplets, cancer cells displayed vigorous proliferation, and the cells grew in clusters and formed a unique spindle like clone. Quantitative analysis proved that various gene transcription and protein expression were up-regulated for the cells in the 3d OA-COL droplets, including F-actin reassembling, focal adhesion, pseudopodia formation, and the proteins involved in epithelial-to-mesenchymal transition (EMT). The 3d OA-COL droplets induced the cells with strengthened polarity, invasiveness, higher IC50, and manifested stronger tumorigenicity in vivo. The fabricated 3d OA-COL droplets reproduced a variety of TME parameters, constructed an in vitro model similar to the TME in vivo, and it may facilitate many investigations in cell biology and tumor biology.
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Affiliation(s)
- Yanan Li
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou 325027, PR China
| | - Lingyun He
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou 325027, PR China
| | - Jiamin Chen
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou 325027, PR China
| | - Jinfeng Wang
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou 325027, PR China
| | - Shujing Zhao
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou 325027, PR China
| | - Xingxing Liu
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou 325027, PR China
| | - Xiaoling Guo
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou 325027, PR China
| | - Ying Wu
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou 325027, PR China
| | - Xian Shen
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou 325027, PR China.
| | - Chao Li
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan West Road, Wenzhou 325027, PR China.
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Chen B, Wu P, Liang L, Zhao C, Wang Z, He L, Zhang R, Xu N. Inhibited effect of an RGD peptide hydrogel on the expression of β1-integrin, FAK, and Akt in Tenon's capsule fibroblasts. J Biomed Mater Res B Appl Biomater 2021; 109:1857-1865. [PMID: 33847460 DOI: 10.1002/jbm.b.34847] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 03/28/2021] [Accepted: 03/31/2021] [Indexed: 12/15/2022]
Abstract
Tenon's capsule fibroblasts are the main cellular components of filtration tract scar that limit the success rate of glaucoma filtration surgery. Scar formation results from infiltration and proliferation of fibroblasts into damaged areas, meanwhile synthesis of extracellular matrix glycoproteins. Integrins are cell surface receptors for extracellular molecules that mediate cell adhesion, spreading, migration, and invasion. They bind their ligands often through recognition of short amino-acid sequences-arginine-glycine-aspartic acid (RGD). Peptides that contain RGD sequence can compete with RGD containing insoluble matrix proteins for binding to the integrin receptor and thus prevent the downstream signaling pathway. Increasing evidence supports that β1-integrin/focal adhesion kinase (FAK)/Akt signal pathway plays an important role in fibrogenesis and scar formation in different tissues. In consideration of advantages of peptide hydrogel, that is well biocompatibility, gel state, degradability, good drug loading, we designed and fabricated an RGD peptide hydrogel, and hypothesized that it could inhibit the expression of β1-integrin, FAK, and Akt in Tenon's capsule fibroblasts. Rheology results showed that 1% wt Fmoc-FFGGRGD peptide solution could self-assemble into hydrogel. Western blot analysis revealed that there were statistical differences between control group and 1% wt group in β1-integrin/β-actin, FAK/β-actin, Akt/β-actin respectively (*p < .05). The relative mRNA expression of β1-integrin, FAK, Akt in control group and 1% wt group were also statistically different respectively (*p < .05). We proved that 1% wt Fmoc-FFGGRGD self-assembly peptide hydrogel could inhibit the expression of β1-integrin, FAK and Akt in Tenon's capsule fibroblasts. It is a promising way to solve scar formation of glaucoma filter channel.
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Affiliation(s)
- Baoji Chen
- Department of Ophthalmology, Yichang Central People's Hospital, The first college of Clinical Medical Science, China Three Gorges University, Yichang, China
| | - Ping Wu
- Department of Ophthalmology, Yichang Central People's Hospital, The first college of Clinical Medical Science, China Three Gorges University, Yichang, China
| | - Liang Liang
- Department of Ophthalmology, Yichang Central People's Hospital, The first college of Clinical Medical Science, China Three Gorges University, Yichang, China
| | - Chenchen Zhao
- Institute of Biology and Medicine, College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, China
| | - Zheng Wang
- Department of Ophthalmology, Yichang Central People's Hospital, The first college of Clinical Medical Science, China Three Gorges University, Yichang, China
| | - Liye He
- Department of Ophthalmology, Yichang Central People's Hospital, The first college of Clinical Medical Science, China Three Gorges University, Yichang, China
| | - Ran Zhang
- Department of Ophthalmology, Yichang Central People's Hospital, The first college of Clinical Medical Science, China Three Gorges University, Yichang, China
| | - Na Xu
- Institute of Biology and Medicine, College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, China
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