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Chen X, Yan Y, Liu Y, Yi Q, Xu Z. Tabersonine Enhances Olaparib Sensitivity through FHL1-Mediated Epithelial-Mesenchymal Transition in an Ovarian Tumor. JOURNAL OF NATURAL PRODUCTS 2024; 87:837-848. [PMID: 38417401 DOI: 10.1021/acs.jnatprod.3c01056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
Ovarian cancer (OVC) is one of the most aggressive gynecological malignancies worldwide. Although olaparib treatment has shown favorable outcomes against the treatment of OVC, its effectiveness remains limited in some OVC patients. Investigating new strategies to improve the therapeutic efficacy of olaparib against OVC is imperative. Our study identified tabersonine, a natural indole alkaloid, for its potential to increase the chemosensitivity of olaparib in OVC. The combined treatment of olaparib and tabersonine synergistically inhibited cell proliferation in OVC cells and suppressed tumor growth in A2780 xenografts. The combined treatment effectively suppressed epithelial-mesenchymal transition (EMT) by altering the expression of E-cadherin, N-cadherin, and vimentin and induced DNA damage responses. Integrating quantitative proteomics, FHL1 was identified as a potential regulator to modulate EMT after tabersonine treatment. Increased expression of FHL1 was induced by tabersonine treatment, while downregulation of FHL1 reversed the inhibitory effects of tabersonine on OVC cells by mediating EMT. In vivo findings further reflected that the combined treatment of tabersonine and olaparib significantly inhibited tumor growth and OVC metastasis through upregulation of FHL1. Our findings reveal the role of tabersonine in improving the sensitivity of olaparib in OVC through FHL1-mediated EMT, suggesting that tabersonine holds promise for future application in OVC treatment.
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Affiliation(s)
- Xi Chen
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Yuanliang Yan
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Yuanhong Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Qiaoli Yi
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Zhijie Xu
- Department of Pathology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
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2
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Chen T, Karedla N, Enderlein J. Measuring sub-nanometer undulations at microsecond temporal resolution with metal- and graphene-induced energy transfer spectroscopy. Nat Commun 2024; 15:1789. [PMID: 38413608 PMCID: PMC10899616 DOI: 10.1038/s41467-024-45822-x] [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: 06/01/2023] [Accepted: 02/01/2024] [Indexed: 02/29/2024] Open
Abstract
Out-of-plane fluctuations, also known as stochastic displacements, of biological membranes play a crucial role in regulating many essential life processes within cells and organelles. Despite the availability of various methods for quantifying membrane dynamics, accurately quantifying complex membrane systems with rapid and tiny fluctuations, such as mitochondria, remains a challenge. In this work, we present a methodology that combines metal/graphene-induced energy transfer (MIET/GIET) with fluorescence correlation spectroscopy (FCS) to quantify out-of-plane fluctuations of membranes with simultaneous spatiotemporal resolution of approximately one nanometer and one microsecond. To validate the technique and spatiotemporal resolution, we measure bending undulations of model membranes. Furthermore, we demonstrate the versatility and applicability of MIET/GIET-FCS for studying diverse membrane systems, including the widely studied fluctuating membrane system of human red blood cells, as well as two unexplored membrane systems with tiny fluctuations, a pore-spanning membrane, and mitochondrial inner/outer membranes.
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Affiliation(s)
- Tao Chen
- Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, Göttingen, 37077, Germany
| | - Narain Karedla
- The Rosalind Franklin Institute, Harwell Campus, Didcot, OX11 OFA, UK
- Kennedy Institute of Rheumatology, University of Oxford, Roosevelt Drive, Oxford, OX3 7LF, UK
| | - Jörg Enderlein
- Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, Göttingen, 37077, Germany.
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), Universitätsmedizin Göttingen, Robert-Koch-Str. 40, Göttingen, 37075, Germany.
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3
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Lu J, Kornmann M, Traub B. Role of Epithelial to Mesenchymal Transition in Colorectal Cancer. Int J Mol Sci 2023; 24:14815. [PMID: 37834263 PMCID: PMC10573312 DOI: 10.3390/ijms241914815] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/28/2023] [Accepted: 09/29/2023] [Indexed: 10/15/2023] Open
Abstract
The epithelial-mesenchymal transition (EMT) is a cellular reprogramming process that occurs during embryonic development and adult tissue homeostasis. This process involves epithelial cells acquiring a mesenchymal phenotype. Through EMT, cancer cells acquire properties associated with a more aggressive phenotype. EMT and its opposite, mesenchymal-epithelial transition (MET), have been described in more tumors over the past ten years, including colorectal cancer (CRC). When EMT is activated, the expression of the epithelial marker E-cadherin is decreased and the expression of the mesenchymal marker vimentin is raised. As a result, cells temporarily take on a mesenchymal phenotype, becoming motile and promoting the spread of tumor cells. Epithelial-mesenchymal plasticity (EMP) has become a hot issue in CRC because strong inducers of EMT (such as transforming growth factor β, TGF-β) can initiate EMT and regulate metastasis, microenvironment, and immune system resistance in CRC. In this review, we take into account the significance of EMT-MET in CRC and the impact of the epithelial cells' plasticity on the prognosis of CRC. The analysis of connection between EMT and colorectal cancer stem cells (CCSCs) will help to further clarify the current meager understandings of EMT. Recent advances affecting important EMT transcription factors and EMT and CCSCs are highlighted. We come to the conclusion that the regulatory network for EMT in CRC is complicated, with a great deal of crosstalk and alternate paths. More thorough research is required to more effectively connect the clinical management of CRC with biomarkers and targeted treatments associated with EMT.
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Affiliation(s)
| | | | - Benno Traub
- Department of General and Visceral Surgery, Ulm University Hospital, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (J.L.); (M.K.)
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4
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Gong D, Zhao Q, Liu J, Zhao S, Yi C, Lv J, Yu H, Bian E, Tian D. Identification of a novel MYC target gene set signature for predicting the prognosis of osteosarcoma patients. Front Oncol 2023; 13:1169430. [PMID: 37342196 PMCID: PMC10277635 DOI: 10.3389/fonc.2023.1169430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Accepted: 05/04/2023] [Indexed: 06/22/2023] Open
Abstract
Osteosarcoma is a primary malignant tumor found mainly in teenagers and young adults. Patients have very little long-term survival. MYC controls tumor initiation and progression by regulating the expression of its target genes; thus, constructing a risk signature of osteosarcoma MYC target gene set will benefit the evaluation of both treatment and prognosis. In this paper, we used GEO data to download the ChIP-seq data of MYC to obtain the MYC target gene. Then, a risk signature consisting of 10 MYC target genes was developed using Cox regression analysis. The signature indicates that patients in the high-risk group performed poorly. After that, we verified it in the GSE21257 dataset. In addition, the difference in tumor immune function among the low- and high-risk populations was compared by single sample gene enrichment analysis. Immunotherapy and prediction of response to the anticancer drug have shown that the risk signature of the MYC target gene set was positively correlated with immune checkpoint response and drug sensitivity. Functional analysis has demonstrated that these genes are enriched in malignant tumors. Finally, STX10 was selected for functional experimentation. STX10 silence has limited osteosarcoma cell migration, invasion, and proliferation. Therefore, these findings indicated that the MYC target gene set risk signature could be used as a potential therapeutic target and prognostic indicator in patients with osteosarcoma.
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Affiliation(s)
- Deliang Gong
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Institute of Orthopaedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Qingzhong Zhao
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Institute of Orthopaedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Jun Liu
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Institute of Orthopaedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Shibing Zhao
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Institute of Orthopaedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Chengfeng Yi
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Institute of Orthopaedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Jianwei Lv
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Institute of Orthopaedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Hang Yu
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Institute of Orthopaedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Erbao Bian
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Institute of Orthopaedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Dasheng Tian
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
- Institute of Orthopaedics, Research Center for Translational Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
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Hauke L, Isbaner S, Ghosh A, Guido I, Turco L, Chizhik AI, Gregor I, Karedla N, Rehfeldt F, Enderlein J. Metal-Induced Energy Transfer (MIET) for Live-Cell Imaging with Fluorescent Proteins. ACS NANO 2023; 17:8242-8251. [PMID: 36995274 PMCID: PMC10173696 DOI: 10.1021/acsnano.2c12372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Metal-induced energy transfer (MIET) imaging is an easy-to-implement super-resolution modality that achieves nanometer resolution along the optical axis of a microscope. Although its capability in numerous biological and biophysical studies has been demonstrated, its implementation for live-cell imaging with fluorescent proteins is still lacking. Here, we present its applicability and capabilities for live-cell imaging with fluorescent proteins in diverse cell types (adult human stem cells, human osteo-sarcoma cells, and Dictyostelium discoideum cells), and with various fluorescent proteins (GFP, mScarlet, RFP, YPet). We show that MIET imaging achieves nanometer axial mapping of living cellular and subcellular components across multiple time scales, from a few milliseconds to hours, with negligible phototoxic effects.
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Affiliation(s)
- Lara Hauke
- Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Sebastian Isbaner
- Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Arindam Ghosh
- Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Isabella Guido
- Max Planck Institute for Dynamics and Self-Organization, Am Faßberg 17, 37077 Göttingen, Germany
| | - Laura Turco
- Max Planck Institute for Dynamics and Self-Organization, Am Faßberg 17, 37077 Göttingen, Germany
| | - Alexey I Chizhik
- Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Ingo Gregor
- Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Narain Karedla
- Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Florian Rehfeldt
- Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Jörg Enderlein
- Third Institute of Physics - Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), Universitätsmedizin Göttingen, Robert-Koch-Strasse 40, 37075 Göttingen, Germany
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6
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Xu Q, Wang J, Wang J, Zhu Y, Chen B, Guo R, Qian Y, Yuan H, Liu F. A Pan-Cancer Analysis to Provide Insight into the Immunological Role and Prognostic Value of HTRA3. Crit Rev Eukaryot Gene Expr 2023; 33:57-75. [PMID: 37606164 DOI: 10.1615/critreveukaryotgeneexpr.2023048936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
High-temperature requirement factor A3 (HTRA3), a member of the HTRA protein family, is closely associated with apoptosis and plays a crucial role in controlling signal transmission and cancer development. However, the regulatory pathways of HTRA3 in tumors are not fully understood, necessitating a comprehensive analysis of HTRA3 in cancers. In this study, we conducted a multi-omics analysis of HTRA3 in pan-cancer using data from various databases including TCGA, cBioPortal, GeneMANIA, DAVID, TIMER2.0, SangerBox, and RNAactDrug. Our analysis included gene expression, survival prognosis, diagnostic value, mutation, gene-gene interaction, enrichment analysis, and drug sensitivity analysis. We found that HTRA3 is aberrantly expressed in a variety of cancers and significantly correlates with diagnosis, prognosis, TMB, MSI, immune checkpoint (ICP) genes, and drug sensitivity in various cancer types. HTRA3 is involved in a variety of cancer pathways, particularly extracellular matrix (ECM) alterations, and has a potential role in epithelial-mesenchymal transition (EMT). HTRA3 expression is positively correlated with the abundance of cancer-associated fibroblasts (CAFs) and endothelial cells in the tumor microenvironment, and is also positively correlated with immune scores, stromal scores, and ESTIMATE scores in multiple cancers. HTRA3 is often overexpressed in cancer and is associated with poor prognosis and regulation of the tumor's immune response. Therefore, it may serve as a novel biomarker for tumor diagnosis and treatment.
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Affiliation(s)
- Qi Xu
- Department of Breast Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Jiale Wang
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Jing Wang
- Department of Breast Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yukuan Zhu
- Department of Anesthesiology, Harbin Fifth Hospital, Harbin, China
| | - Baihui Chen
- Department of Breast Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Runzhao Guo
- Department of Breast Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yao Qian
- Department of Breast Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Haiyu Yuan
- Department of Breast Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Feng Liu
- Department of Breast Surgery, Harbin Medical University Cancer Hospital, Harbin, China
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7
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Xue XM, Liu YY, Chen XM, Tao BY, Liu P, Zhou HW, Zhang C, Wang L, Jiang YK, Ding ZW, Shen WD, Zhang J, Yang SM, Wang FY. Pan-cancer analysis identifies NT5E as a novel prognostic biomarker on cancer-associated fibroblasts associated with unique tumor microenvironment. Front Pharmacol 2022; 13:1064032. [PMID: 36569293 PMCID: PMC9768042 DOI: 10.3389/fphar.2022.1064032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 11/24/2022] [Indexed: 12/12/2022] Open
Abstract
Background: Ecto-5'-nucleotidase (NT5E) encodes the cluster of differentiation 73 (CD73), whose overexpression contributes to the formation of immunosuppressive tumor microenvironment and is related to exacerbated prognosis, increased risk of metastasis and resistance to immunotherapy of various tumors. However, the prognostic significance of NT5E in pan-cancer is obscure so far. Methods: We explored the expression level of NT5E in cancers and adjacent tissues and revealed the relationship between the NT5E expression level and clinical outcomes in pan-cancer by utilizing the UCSC Xena database. Then, correlation analyses were performed to evaluate the relationship between NT5E expression and immune infiltration level via EPIC, MCP-counter and CIBERSORT methods, and the enrichment analysis were employed to identify NT5E-interacting molecules and functional pathways. Furthermore, we conducted single-cell analysis to explore the potential role of NT5E on single-cell level based on the CancerSEA database. Meanwhile, gene set enrichment analysis (GSEA) in single-cell level was also conducted in TISCH database and single-cell signature explorer was utilized to evaluate the epithelial-mesenchymal transition (EMT) level in each cell type. Results: The expression level of NT5E was aberrant in almost all cancer types, and was correlated with worse prognosis in several cancers. Notably, NT5E overexpression was related to worse overall survival (OS) in pancreatic adenocarcinoma (PAAD), head and neck squamous cell carcinoma (HNSC), mesothelioma (MESO), stomach adenocarcinoma (STAD), uveal melanoma (UVM) and cervical squamous cell carcinoma and endocervical adenocarcinoma (CESC) (p < 0.01). NT5E-related immune microenvironment analysis revealed that NT5E is associated positively with the degree of infiltration of cancer-associated fibroblasts (CAFs) and endothelial cells in most cancers. Enrichment analysis of cellular component (CC) demonstrated the critical part of NT5E played in cell-substrate junction, cell-substrate adherens junction, focal adhesion and external side of plasma membrane. Finally, single-cell analysis of NT5E illuminated that EMT function of CAFs was elevated in basal cell carcinoma (BCC), skin cutaneous melanoma (SKCM), HNSC and PAAD. Conclusion: NT5E could serve as a potential prognostic biomarker for cancers. The potential mechanism may be related to the upregulated EMT function of CAFs, which provides novel inspiration for immunotherapy by targeting CAFs with high NT5E expression.
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Affiliation(s)
- Xin-miao Xue
- Medical School of Chinese People’s Liberation Army (PLA), Beijing, China,Senior Department of Otolaryngology-Head & Neck Surgery, Chinese People’s Liberation Army (PLA) General Hospital, National Clinical Research Center for Otolaryngologic Diseases, State Key Lab of Hearing Science, Beijing Key Lab of Hearing Impairment Prevention and Treatment, Ministry of Education, Beijing, China
| | - Yu-yang Liu
- Medical School of Chinese People’s Liberation Army (PLA), Beijing, China,Department of Neurosurgery, Chinese People’s Liberation Army (PLA) General Hospital, Beijing, China
| | - Xue-min Chen
- Medical School of Chinese People’s Liberation Army (PLA), Beijing, China,Senior Department of Otolaryngology-Head & Neck Surgery, Chinese People’s Liberation Army (PLA) General Hospital, National Clinical Research Center for Otolaryngologic Diseases, State Key Lab of Hearing Science, Beijing Key Lab of Hearing Impairment Prevention and Treatment, Ministry of Education, Beijing, China
| | - Bing-yan Tao
- Medical School of Chinese People’s Liberation Army (PLA), Beijing, China,Department of Neurosurgery, Chinese People’s Liberation Army (PLA) General Hospital, Beijing, China
| | - Peng Liu
- Medical School of Chinese People’s Liberation Army (PLA), Beijing, China,Senior Department of Otolaryngology-Head & Neck Surgery, Chinese People’s Liberation Army (PLA) General Hospital, National Clinical Research Center for Otolaryngologic Diseases, State Key Lab of Hearing Science, Beijing Key Lab of Hearing Impairment Prevention and Treatment, Ministry of Education, Beijing, China
| | - Han-wen Zhou
- Medical School of Chinese People’s Liberation Army (PLA), Beijing, China,Senior Department of Otolaryngology-Head & Neck Surgery, Chinese People’s Liberation Army (PLA) General Hospital, National Clinical Research Center for Otolaryngologic Diseases, State Key Lab of Hearing Science, Beijing Key Lab of Hearing Impairment Prevention and Treatment, Ministry of Education, Beijing, China
| | - Chi Zhang
- Medical School of Chinese People’s Liberation Army (PLA), Beijing, China,The Zhantansi Outpatient Department of Central Medical Branch of People’s Liberation Army (PLA) General Hospital Beijing, China
| | - Li Wang
- Medical School of Chinese People’s Liberation Army (PLA), Beijing, China,Senior Department of Otolaryngology-Head & Neck Surgery, Chinese People’s Liberation Army (PLA) General Hospital, National Clinical Research Center for Otolaryngologic Diseases, State Key Lab of Hearing Science, Beijing Key Lab of Hearing Impairment Prevention and Treatment, Ministry of Education, Beijing, China
| | - Yu-ke Jiang
- Medical School of Chinese People’s Liberation Army (PLA), Beijing, China,Senior Department of Otolaryngology-Head & Neck Surgery, Chinese People’s Liberation Army (PLA) General Hospital, National Clinical Research Center for Otolaryngologic Diseases, State Key Lab of Hearing Science, Beijing Key Lab of Hearing Impairment Prevention and Treatment, Ministry of Education, Beijing, China
| | - Zhi-wei Ding
- Medical School of Chinese People’s Liberation Army (PLA), Beijing, China,Senior Department of Otolaryngology-Head & Neck Surgery, Chinese People’s Liberation Army (PLA) General Hospital, National Clinical Research Center for Otolaryngologic Diseases, State Key Lab of Hearing Science, Beijing Key Lab of Hearing Impairment Prevention and Treatment, Ministry of Education, Beijing, China
| | - Wei-dong Shen
- Senior Department of Otolaryngology-Head & Neck Surgery, Chinese People’s Liberation Army (PLA) General Hospital, National Clinical Research Center for Otolaryngologic Diseases, State Key Lab of Hearing Science, Beijing Key Lab of Hearing Impairment Prevention and Treatment, Ministry of Education, Beijing, China
| | - Jun Zhang
- Department of Neurosurgery, Chinese People’s Liberation Army (PLA) General Hospital, Beijing, China,*Correspondence: Jun Zhang, ; Shi-ming Yang, ; Fang-yuan Wang,
| | - Shi-ming Yang
- Senior Department of Otolaryngology-Head & Neck Surgery, Chinese People’s Liberation Army (PLA) General Hospital, National Clinical Research Center for Otolaryngologic Diseases, State Key Lab of Hearing Science, Beijing Key Lab of Hearing Impairment Prevention and Treatment, Ministry of Education, Beijing, China,*Correspondence: Jun Zhang, ; Shi-ming Yang, ; Fang-yuan Wang,
| | - Fang-yuan Wang
- Senior Department of Otolaryngology-Head & Neck Surgery, Chinese People’s Liberation Army (PLA) General Hospital, National Clinical Research Center for Otolaryngologic Diseases, State Key Lab of Hearing Science, Beijing Key Lab of Hearing Impairment Prevention and Treatment, Ministry of Education, Beijing, China,*Correspondence: Jun Zhang, ; Shi-ming Yang, ; Fang-yuan Wang,
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8
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Bea-Mascato B, Neira-Goyanes E, Iglesias-Rodríguez A, Valverde D. Depletion of ALMS1 affects TGF-β signalling pathway and downstream processes such as cell migration and adhesion capacity. Front Mol Biosci 2022; 9:992313. [PMID: 36325276 PMCID: PMC9621122 DOI: 10.3389/fmolb.2022.992313] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 09/13/2022] [Indexed: 12/23/2023] Open
Abstract
Background: ALMS1 is a ubiquitous gene associated with Alström syndrome (ALMS). The main symptoms of ALMS affect multiple organs and tissues, generating at last, multi-organic fibrosis in the lungs, kidneys and liver. TGF-β is one of the main pathways implicated in fibrosis, controlling the cell cycle, apoptosis, cell migration, cell adhesion and epithelial-mesenchymal transition (EMT). Nevertheless, the role of ALMS1 gene in fibrosis generation and other implicated processes such as cell migration or cell adhesion via the TGF- β pathway has not been elucidated yet. Methods: Initially, we evaluated how depletion of ALMS1 affects different processes like apoptosis, cell cycle and mitochondrial activity in HeLa cells. Then, we performed proteomic profiling with TGF-β stimuli in HeLa ALMS1 -/- cells and validated the results by examining different EMT biomarkers using qPCR. The expression of these EMT biomarkers were also studied in hTERT-BJ-5ta ALMS1 -/-. Finally, we evaluated the SMAD3 and SMAD2 phosphorylation and cell migration capacity in both models. Results: Depletion of ALMS1 generated apoptosis resistance to thapsigargin (THAP) and C2-Ceramide (C2-C), and G2/M cell cycle arrest in HeLa cells. For mitochondrial activity, results did not show significant differences between ALMS1 +/+ and ALMS1 -/-. Proteomic results showed inhibition of downstream pathways regulated by TGF-β. The protein-coding genes (PCG) were associated with processes like focal adhesion or cell-substrate adherens junction in HeLa. SNAI1 showed an opposite pattern to what would be expected when activating the EMT in HeLa and BJ-5ta. Finally, in BJ-5ta model a reduced activation of SMAD3 but not SMAD2 were also observed. In HeLa model no alterations in the canonical TGF-β pathway were observed but both cell lines showed a reduction in migration capacity. Conclusion: ALMS1 has a role in controlling the cell cycle and the apoptosis processes. Moreover, the depletion of ALMS1 affects the signal transduction through the TGF-β and other processes like the cell migration and adhesion capacity.
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Affiliation(s)
- Brais Bea-Mascato
- CINBIO, Universidad de Vigo, Vigo, Spain
- Grupo de Investigación en Enfermedades Raras y Medicina Pediátrica, Instituto de Investigación Sanitaria Galicia Sur (IIS Galicia Sur), SERGAS-UVIGO, Vigo, Spain
| | - Elena Neira-Goyanes
- CINBIO, Universidad de Vigo, Vigo, Spain
- Grupo de Investigación en Enfermedades Raras y Medicina Pediátrica, Instituto de Investigación Sanitaria Galicia Sur (IIS Galicia Sur), SERGAS-UVIGO, Vigo, Spain
| | - Antía Iglesias-Rodríguez
- CINBIO, Universidad de Vigo, Vigo, Spain
- Grupo de Investigación en Enfermedades Raras y Medicina Pediátrica, Instituto de Investigación Sanitaria Galicia Sur (IIS Galicia Sur), SERGAS-UVIGO, Vigo, Spain
| | - Diana Valverde
- CINBIO, Universidad de Vigo, Vigo, Spain
- Grupo de Investigación en Enfermedades Raras y Medicina Pediátrica, Instituto de Investigación Sanitaria Galicia Sur (IIS Galicia Sur), SERGAS-UVIGO, Vigo, Spain
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9
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Guo Z, Yang CT, Chien CC, Selth LA, Bagnaninchi PO, Thierry B. Optical Cellular Micromotion: A New Paradigm to Measure Tumor Cells Invasion within Gels Mimicking the 3D Tumor Environments. SMALL METHODS 2022; 6:e2200471. [PMID: 35764869 DOI: 10.1002/smtd.202200471] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/22/2022] [Indexed: 06/15/2023]
Abstract
Measuring tumor cell invasiveness through 3D tissues, particularly at the single-cell level, can provide important mechanistic understanding and assist in identifying therapeutic targets of tumor invasion. However, current experimental approaches, including standard in vitro invasion assays, have limited physiological relevance and offer insufficient insight into the vast heterogeneity in tumor cell migration through tissues. To address these issues, here the concept of optical cellular micromotion is reported on, where digital holographic microscopy is used to map the optical nano- to submicrometer thickness fluctuations within single-cells. These fluctuations are driven by the dynamic movement of subcellular structures including the cytoskeleton and inherently associated with the biological processes involved in cell invasion within tissues. It is experimentally demonstrated that the optical cellular micromotion correlates with tumor cells motility and invasiveness both at the population and single-cell levels. In addition, the optical cellular micromotion significantly reduced upon treatment with migrastatic drugs that inhibit tumor cell invasion. These results demonstrate that micromotion measurements can rapidly and non-invasively determine the invasive behavior of single tumor cells within tissues, yielding a new and powerful tool to assess the efficacy of approaches targeting tumor cell invasiveness.
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Affiliation(s)
- Zhaobin Guo
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Chih-Tsung Yang
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Chia-Chi Chien
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Luke A Selth
- Flinders Health and Medical Research Institute and Freemasons Centre for Male Health and Wellbeing, Flinders University, Bedford Park, SA, 5042, Australia
- Dame Roma Mitchell Cancer Research Laboratories and Freemasons Foundation Centre for Male Health and Wellbeing, Adelaide Medical School, The University of Adelaide, Adelaide, SA, 5000, Australia
| | - Pierre O Bagnaninchi
- Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, EH16 4UU, UK
| | - Benjamin Thierry
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes, SA, 5095, Australia
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10
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Thiele JC, Jungblut M, Helmerich DA, Tsukanov R, Chizhik A, Chizhik AI, Schnermann MJ, Sauer M, Nevskyi O, Enderlein J. Isotropic three-dimensional dual-color super-resolution microscopy with metal-induced energy transfer. SCIENCE ADVANCES 2022; 8:eabo2506. [PMID: 35675401 PMCID: PMC9176750 DOI: 10.1126/sciadv.abo2506] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 04/25/2022] [Indexed: 05/25/2023]
Abstract
Over the past two decades, super-resolution microscopy has seen a tremendous development in speed and resolution, but for most of its methods, there exists a remarkable gap between lateral and axial resolution, which is by a factor of 2 to 3 worse. One recently developed method to close this gap is metal-induced energy transfer (MIET) imaging, which achieves an axial resolution down to nanometers. It exploits the distance-dependent quenching of fluorescence when a fluorescent molecule is brought close to a metal surface. In the present manuscript, we combine the extreme axial resolution of MIET imaging with the extraordinary lateral resolution of single-molecule localization microscopy, in particular with direct stochastic optical reconstruction microscopy (dSTORM). This combination allows us to achieve isotropic three-dimensional super-resolution imaging of subcellular structures. Moreover, we used spectral demixing for implementing dual-color MIET-dSTORM that allows us to image and colocalize, in three dimensions, two different cellular structures simultaneously.
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Affiliation(s)
- Jan Christoph Thiele
- Third Institute of Physics–Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Marvin Jungblut
- Department of Biotechnology and Biophysics, Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Dominic A. Helmerich
- Department of Biotechnology and Biophysics, Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Roman Tsukanov
- Third Institute of Physics–Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Anna Chizhik
- Third Institute of Physics–Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Alexey I. Chizhik
- Third Institute of Physics–Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Martin J. Schnermann
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
| | - Markus Sauer
- Department of Biotechnology and Biophysics, Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Oleksii Nevskyi
- Third Institute of Physics–Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Jörg Enderlein
- Third Institute of Physics–Biophysics, Georg August University, 37077 Göttingen, Germany
- Cluster of Excellence “Multiscale Bioimaging: From Molecular Machines to Networks of Excitable Cells” (MBExC), Georg August University, Göttingen, Germany
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11
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A Novel Prognostic Model Based on Seven Necroptosis-Related miRNAs for Predicting the Overall Survival of Patients with Lung Adenocarcinoma. BIOMED RESEARCH INTERNATIONAL 2022; 2022:3198590. [PMID: 35372581 PMCID: PMC8972154 DOI: 10.1155/2022/3198590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 02/11/2022] [Indexed: 12/21/2022]
Abstract
Lung adenocarcinoma (LUAD) remains one of the leading causes of cancer-related deaths worldwide. This study is aimed at constructing a risk scoring model based on necroptosis-related miRNAs to predict prognosis of LUAD. Expression profile of miRNA in LUAD was downloaded from The Cancer Genome Atlas (TCGA) database. We screened the differentially expressed necroptosis-related miRNAs between LUAD patients and normal samples, thus constructed a seven miRNA-based risk stratification on the basis of the TGCA cohort. This risk stratification was prove to be effective in predicting the overall survival (OS) of patients with LUAD. Furthermore, we constructed a nomogram model based on the combination of risk characteristics and clinicopathological features, which was also prove to be accurate and efficient in predicting OS of LUAD patients. Functional enrichment analyses on the targeted genes of these miRNAs with prognostic value were carried out. Results indicated that these targeted genes were closely related to the development and metastasis of tumors. In summary, our research has developed a prognostic model based on the expression of miRNAs related to necroptosis. This model might be used to predict the prognosis of LUAD accurately, which might be helpful in improving treatment efficacy of LUAD.
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12
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Zhao Y, Li X, Zhang H, Yan M, Jia M, Zhou Q. A Transcriptome Sequencing Study on Genome-Wide Gene Expression Differences of Lung Cancer Cells Modulated by Fucoidan. Front Bioeng Biotechnol 2022; 10:844924. [PMID: 35299642 PMCID: PMC8923512 DOI: 10.3389/fbioe.2022.844924] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 01/27/2022] [Indexed: 12/25/2022] Open
Abstract
Fucoidan has received increasing attention in anti-(lung) tumors. However, the effect of fucoidan on the gene changes of lung cancer cells (LCCs) has not been examined systematically. Herein, we investigate the effect of fucoidan on the phenotypes of LCCs and their gene expression by transcriptome sequencing analysis. The phenotypes of LCCs are significantly inhibited by fucoidan. Importantly, compared to LCCs, 1 mg/ml fucoidan has no effect on the phenotypes of normal cells. Further, 6,930 differentially expressed genes (DEGs) in the transcriptome of LCCs (3,501 up-regulated and 3,429 down-regulated genes) are detected via RNA-sequencing between the fucoidan and control groups. Gene Ontology analysis confirms that DEGs are reflected in DNA replication, cell-substrate junction, regulation of cell cycle phase transition, apoptosis, focal adhesion, cadherin binding, and cell adhesion molecule binding. Thus, our findings on the transcriptomic level highlight the therapeutic potential of fucoidan for lung cancer treatment.
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Affiliation(s)
- Yanjie Zhao
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- School of Public Health, Qingdao University, Qingdao, China
| | - Xinmei Li
- School of Public Health, Qingdao University, Qingdao, China
| | - Heng Zhang
- School of Public Health, Qingdao University, Qingdao, China
| | - Mingzhe Yan
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Mengmeng Jia
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- School of Public Health, Qingdao University, Qingdao, China
| | - Qihui Zhou
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- *Correspondence: Qihui Zhou,
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13
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Hwang W, Kim D, Kim D. Axial Scanning Metal-Induced Energy Transfer Microscopy for Extended Range Nanometer-Sectioning Cell Imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2105497. [PMID: 35174635 DOI: 10.1002/smll.202105497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/29/2021] [Indexed: 06/14/2023]
Abstract
Nanometer-sectioning optical microscopy has become an indispensable tool in membrane-related biomedical studies. Finally, many nanometer-sectioning imaging schemes, such as variable-angle total internal reflection fluorescence microscopy, metal-induced energy transfer (MIET) imaging, and supercritical-angle fluorescence microscopy have been introduced. However, these methods can measure a single layer of molecules, and the measurement ranges are below 100 nm, which is not large enough to cover the thickness of lamellipodium. This paper proposes an optical imaging scheme that can identify the axial locations of two layers of molecules with an extended measurement range and a nanometer-scale precision by using MIET, axial focal plane scanning, and biexponential analysis in fluorescence lifetime imaging microscopy. The feasibility of the proposed method is demonstrated by measuring an artificial sample of a known structure and the lamellipodium of a human aortic endothelial cell whose thickness ranges from 100 to 450 nm with 18.3 nm precision.
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Affiliation(s)
- Wonsang Hwang
- Department of Physics, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, South Korea
| | - Dongeun Kim
- Department of Physics, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, South Korea
| | - Dugyoung Kim
- Department of Physics, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, South Korea
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14
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El Arawi D, Vézy C, Déturche R, Lehmann M, Kessler H, Dontenwill M, Jaffiol R. Advanced quantification for single-cell adhesion by variable-angle TIRF nanoscopy. BIOPHYSICAL REPORTS 2021; 1:100021. [PMID: 36425460 PMCID: PMC9680782 DOI: 10.1016/j.bpr.2021.100021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 09/07/2021] [Indexed: 05/25/2023]
Abstract
Over the last decades, several techniques have been developed to study cell adhesion; however, they present significant shortcomings. Such techniques mostly focus on strong adhesion related to specific protein-protein associations, such as ligand-receptor binding in focal adhesions. Therefore, weak adhesion, related to less specific or nonspecific cell-substrate interactions, are rarely addressed. Hence, we propose in this work a complete investigation of cell adhesion, from highly specific to nonspecific adhesiveness, using variable-angle total internal reflection fluorescence (vaTIRF) nanoscopy. This technique allows us to map in real time cell topography with a nanometric axial resolution, along with cell cortex refractive index. These two key parameters allow us to distinguish high and low adhesive cell-substrate contacts. Furthermore, vaTIRF provides cell-substrate binding energy, thus revealing a correlation between cell contractility and cell-substrate binding energy. Here, we highlight the quantitative measurements achieved by vaTIRF on U87MG glioma cells expressing different amounts of α 5 integrins and distinct motility on fibronectin. Regarding integrin expression level, data extracted from vaTIRF measurements, such as the number and size of high adhesive contacts per cell, corroborate the adhesiveness of U87MG cells as intended. Interestingly enough, we found that cells overexpressing α 5 integrins present a higher contractility and lower adhesion energy.
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Affiliation(s)
- Dalia El Arawi
- Light, nanomaterials, nanotechnologies, ERL CNRS 7004, Université de Technologie de Troyes, Troyes, France
| | - Cyrille Vézy
- Light, nanomaterials, nanotechnologies, ERL CNRS 7004, Université de Technologie de Troyes, Troyes, France
| | - Régis Déturche
- Light, nanomaterials, nanotechnologies, ERL CNRS 7004, Université de Technologie de Troyes, Troyes, France
| | - Maxime Lehmann
- Laboratoire de Bioimagerie et Pathologies, UMR CNRS 7021, Université de Strasbourg, Faculté de Pharmacie, Illkirch, France
| | - Horst Kessler
- Department Chemie, Institute for Advanced Study, Technische Universität München, Garching, Germany
| | - Monique Dontenwill
- Laboratoire de Bioimagerie et Pathologies, UMR CNRS 7021, Université de Strasbourg, Faculté de Pharmacie, Illkirch, France
| | - Rodolphe Jaffiol
- Light, nanomaterials, nanotechnologies, ERL CNRS 7004, Université de Technologie de Troyes, Troyes, France
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15
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Brown D, Deng HY. Hydrodynamic effects on the energy transfer from dipoles to metal slab. J Chem Phys 2021; 155:114109. [PMID: 34551526 DOI: 10.1063/5.0062708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A systematic study of nonlocal and size effects on the energy transfer of a dipole (e.g., a molecule or a quantum dot) induced by the proximity of a metal slab is presented. Nonlocal effects are accounted for using the hydrodynamic model (HDM). We derive a general relation that connects the energy transfer rate to the linear charge density-density response function of the slab. This function is explicitly evaluated for the HDM and the local Drude model. We show that a thin metal slab can support a series of higher-frequency surface plasma wave (SPW) modes in addition to the normal SPW modes, thanks to the nonlocal effects. These modes markedly alter the response and the energy transfer process, as revealed in the structure of the energy transfer rate in the parameter space. Our findings are important for applications such as the recently developed metal-induced energy transfer imaging, which relies on accurate modeling of the energy transfer rate.
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Affiliation(s)
- Daniel Brown
- School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff CF24 3AA, Wales, United Kingdom
| | - Hai-Yao Deng
- School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff CF24 3AA, Wales, United Kingdom
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16
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Li CH, Hsu TI, Chang YC, Chan MH, Lu PJ, Hsiao M. Stationed or Relocating: The Seesawing EMT/MET Determinants from Embryonic Development to Cancer Metastasis. Biomedicines 2021; 9:biomedicines9091265. [PMID: 34572451 PMCID: PMC8472300 DOI: 10.3390/biomedicines9091265] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 09/06/2021] [Accepted: 09/15/2021] [Indexed: 12/12/2022] Open
Abstract
Epithelial and mesenchymal transition mechanisms continue to occur during the cell cycle and throughout human development from the embryo stage to death. In embryo development, epithelial-mesenchymal transition (EMT) can be divided into three essential steps. First, endoderm, mesoderm, and neural crest cells form, then the cells are subdivided, and finally, cardiac valve formation occurs. After the embryonic period, the human body will be subjected to ongoing mechanical stress or injury. The formation of a wound requires EMT to recruit fibroblasts to generate granulation tissues, repair the wound and re-create an intact skin barrier. However, once cells transform into a malignant tumor, the tumor cells acquire the characteristic of immortality. Local cell growth with no growth inhibition creates a solid tumor. If the tumor cannot obtain enough nutrition in situ, the tumor cells will undergo EMT and invade the basal membrane of nearby blood vessels. The tumor cells are transported through the bloodstream to secondary sites and then begin to form colonies and undergo reverse EMT, the so-called "mesenchymal-epithelial transition (MET)." This dynamic change involves cell morphology, environmental conditions, and external stimuli. Therefore, in this manuscript, the similarities and differences between EMT and MET will be dissected from embryonic development to the stage of cancer metastasis.
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Affiliation(s)
- Chien-Hsiu Li
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan; (C.-H.L.); (T.-I.H.); (M.-H.C.)
| | - Tai-I Hsu
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan; (C.-H.L.); (T.-I.H.); (M.-H.C.)
| | - Yu-Chan Chang
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei 112, Taiwan;
| | - Ming-Hsien Chan
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan; (C.-H.L.); (T.-I.H.); (M.-H.C.)
| | - Pei-Jung Lu
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan
- Clinical Medicine Research Center, College of Medicine, National Cheng Kung University Hospital, National Cheng Kung University, Tainan 704, Taiwan
- Correspondence: (P.-J.L.); (M.H.)
| | - Michael Hsiao
- Genomics Research Center, Academia Sinica, Taipei 115, Taiwan; (C.-H.L.); (T.-I.H.); (M.-H.C.)
- Department of Biochemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Correspondence: (P.-J.L.); (M.H.)
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17
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Ghosh A, Chizhik AI, Karedla N, Enderlein J. Graphene- and metal-induced energy transfer for single-molecule imaging and live-cell nanoscopy with (sub)-nanometer axial resolution. Nat Protoc 2021; 16:3695-3715. [PMID: 34099942 DOI: 10.1038/s41596-021-00558-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 04/19/2021] [Indexed: 02/05/2023]
Abstract
Super-resolution fluorescence imaging that surpasses the classical optical resolution limit is widely utilized for resolving the spatial organization of biological structures at molecular length scales. In one example, single-molecule localization microscopy, the lateral positions of single molecules can be determined more precisely than the diffraction limit if the camera collects individual photons separately. Using several schemes that introduce engineered optical aberrations in the imaging optics, super-resolution along the optical axis (perpendicular to the sample plane) has been achieved, and single-molecule localization microscopy has been successfully applied for the study of 3D biological structures. Nonetheless, the achievable axial localization accuracy is typically three to five times worse than the lateral localization accuracy. Only a few exceptional methods based on interferometry exist that reach nanometer 3D super-resolution, but they involve enormous technical complexity and restricted sample preparations that inhibit their widespread application. We developed metal-induced energy transfer imaging for localizing fluorophores along the axial direction with nanometer accuracy, using only a conventional fluorescence lifetime imaging microscope. In metal-induced energy transfer, experimentally measured fluorescence lifetime values increase linearly with axial distance in the range of 0-100 nm, making it possible to calculate their axial position using a theoretical model. If graphene is used instead of the metal (graphene-induced energy transfer), the same range of lifetime values occurs over a shorter axial distance (~25 nm), meaning that it is possible to get very accurate axial information at the scale of a membrane bilayer or a molecular complex in a membrane. Here, we provide a step-by-step protocol for metal- and graphene-induced energy transfer imaging in single molecules, supported lipid bilayer and live-cell membranes. Depending on the sample preparation time, the complete duration of the protocol is 1-3 d.
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Affiliation(s)
- Arindam Ghosh
- Third Institute of Physics-Biophysics, Georg August University, Göttingen, Germany
| | - Alexey I Chizhik
- Third Institute of Physics-Biophysics, Georg August University, Göttingen, Germany
| | - Narain Karedla
- Rosalind Franklin Institute, Didcot, UK.,Kennedy Institute for Rheumatology, University of Oxford, Oxford, UK
| | - Jörg Enderlein
- Third Institute of Physics-Biophysics, Georg August University, Göttingen, Germany. .,Cluster of Excellence 'Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells' (MBExC), Georg August University, Göttingen, Germany.
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18
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Mishra YG, Manavathi B. Focal adhesion dynamics in cellular function and disease. Cell Signal 2021; 85:110046. [PMID: 34004332 DOI: 10.1016/j.cellsig.2021.110046] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 05/13/2021] [Indexed: 02/06/2023]
Abstract
Acting as a bridge between the cytoskeleton of the cell and the extra cellular matrix (ECM), the cell-ECM adhesions with integrins at their core, play a major role in cell signalling to direct mechanotransduction, cell migration, cell cycle progression, proliferation, differentiation, growth and repair. Biochemically, these adhesions are composed of diverse, yet an organised group of structural proteins, receptors, adaptors, various enzymes including protein kinases, phosphatases, GTPases, proteases, etc. as well as scaffolding molecules. The major integrin adhesion complexes (IACs) characterised are focal adhesions (FAs), invadosomes (podosomes and invadopodia), hemidesmosomes (HDs) and reticular adhesions (RAs). The varied composition and regulation of the IACs and their signalling, apart from being an integral part of normal cell survival, has been shown to be of paramount importance in various developmental and pathological processes. This review per-illustrates the recent advancements in the research of IACs, their crucial roles in normal as well as diseased states. We have also touched on few of the various methods that have been developed over the years to visualise IACs, measure the forces they exert and study their signalling and molecular composition. Having such pertinent roles in the context of various pathologies, these IACs need to be understood and studied to develop therapeutical targets. We have given an update to the studies done in recent years and described various techniques which have been applied to study these structures, thereby, providing context in furthering research with respect to IAC targeted therapeutics.
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Affiliation(s)
- Yasaswi Gayatri Mishra
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500046, India
| | - Bramanandam Manavathi
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500046, India.
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19
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Hwang W, Seo J, Kim D, Lee CJ, Choi IH, Yoo KH, Kim DY. Large field-of-view nanometer-sectioning microscopy by using metal-induced energy transfer and biexponential lifetime analysis. Commun Biol 2021; 4:91. [PMID: 33469155 PMCID: PMC7815909 DOI: 10.1038/s42003-020-01628-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 11/24/2020] [Indexed: 12/04/2022] Open
Abstract
Total internal reflection fluorescence (TIRF) microscopy, which has about 100-nm axial excitation depth, is the method of choice for nanometer-sectioning imaging for decades. Lately, several new imaging techniques, such as variable angle TIRF microscopy, supercritical-angle fluorescence microscopy, and metal-induced energy transfer imaging, have been proposed to enhance the axial resolution of TIRF. However, all of these methods use high numerical aperture (NA) objectives, and measured images inevitably have small field-of-views (FOVs). Small-FOV can be a serious limitation when multiple cells need to be observed. We propose large-FOV nanometer-sectioning microscopy, which breaks the complementary relations between the depth of focus and axial sectioning by using MIET. Large-FOV imaging is achieved with a low-magnification objective, while nanometer-sectioning is realized utilizing metal-induced energy transfer and biexponential fluorescence lifetime analysis. The feasibility of our proposed method was demonstrated by imaging nanometer-scale distances between the basal membrane of human aortic endothelial cells and a substrate. Hwang et al. demonstrate that a high axial resolution can be achieved even with low numerical aperture (NA) objectives. They show the nano-profile of a basal cell membrane using metal-induced energy transfer and biexponential fluorescence lifetime analysis. The low-NA objective provides a larger field-of-view (FOV), thereby overcoming the limitations of a small FOV of the usually used high-NA objectives.
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Affiliation(s)
- Wonsang Hwang
- Department of Physics, Yonsei University, Seoul, Republic of Korea
| | - Jinwon Seo
- Department of Microbiology, Institute for Immunology and Immunological Diseases, College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - DongEun Kim
- Department of Physics, Yonsei University, Seoul, Republic of Korea
| | - Chang Jun Lee
- Department of Physics, Yonsei University, Seoul, Republic of Korea
| | - In-Hong Choi
- Department of Microbiology, Institute for Immunology and Immunological Diseases, College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - Kyung-Hwa Yoo
- Department of Physics, Yonsei University, Seoul, Republic of Korea
| | - Dug Young Kim
- Department of Physics, Yonsei University, Seoul, Republic of Korea.
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20
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Schneider F, Colin-York H, Fritzsche M. Quantitative Bio-Imaging Tools to Dissect the Interplay of Membrane and Cytoskeletal Actin Dynamics in Immune Cells. Front Immunol 2021; 11:612542. [PMID: 33505401 PMCID: PMC7829180 DOI: 10.3389/fimmu.2020.612542] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/23/2020] [Indexed: 12/13/2022] Open
Abstract
Cellular function is reliant on the dynamic interplay between the plasma membrane and the actin cytoskeleton. This critical relationship is of particular importance in immune cells, where both the cytoskeleton and the plasma membrane work in concert to organize and potentiate immune signaling events. Despite their importance, there remains a critical gap in understanding how these respective dynamics are coupled, and how this coupling in turn may influence immune cell function from the bottom up. In this review, we highlight recent optical technologies that could provide strategies to investigate the simultaneous dynamics of both the cytoskeleton and membrane as well as their interplay, focusing on current and future applications in immune cells. We provide a guide of the spatio-temporal scale of each technique as well as highlighting novel probes and labels that have the potential to provide insights into membrane and cytoskeletal dynamics. The quantitative biophysical tools presented here provide a new and exciting route to uncover the relationship between plasma membrane and cytoskeletal dynamics that underlies immune cell function.
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Affiliation(s)
- Falk Schneider
- Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - Huw Colin-York
- Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
- Kennedy Institute for Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Marco Fritzsche
- Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
- Kennedy Institute for Rheumatology, University of Oxford, Oxford, United Kingdom
- Rosalind Franklin Institute, Harwell Campus, Didcot, United Kingdom
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21
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Zelená A, Isbaner S, Ruhlandt D, Chizhik A, Cassini C, Klymchenko AS, Enderlein J, Chizhik A, Köster S. Time-resolved MIET measurements of blood platelet spreading and adhesion. NANOSCALE 2020; 12:21306-21315. [PMID: 33073832 DOI: 10.1039/d0nr05611a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Human blood platelets are non-nucleated fragments of megakaryocytes and of high importance for early hemostasis. To form a blood clot, platelets adhere to the blood vessel wall, spread and attract other platelets. Despite the importance for biomedicine, the exact mechanism of platelet spreading and adhesion to surfaces remains elusive. Here, we employ metal-induced energy transfer (MIET) imaging with a leaflet-specific fluorescent membrane probe to quantitatively determine, with nanometer resolution and in a time-resolved manner, the height profile of the basal and the apical platelet membrane above a rigid substrate during platelet spreading. We observe areas, where the platelet membrane approaches the substrate particularly closely and these areas are stable on a time scale of minutes. Time-resolved MIET measurements reveal distinct behaviors of the outermost rim and the central part of the platelets, respectively. Our findings quantify platelet adhesion and spreading and improve our understanding of early steps in blood clotting. Furthermore, the results of this study demonstrate the potential of MIET for simultaneous imaging of two close-by membranes and thus three-dimensional reconstruction of the cell shape.
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Affiliation(s)
- Anna Zelená
- Institute for X-Ray Physics, University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
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22
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Lee YU, Zhao J, Mo GCH, Li S, Li G, Ma Q, Yang Q, Lal R, Zhang J, Liu Z. Metamaterial-Assisted Photobleaching Microscopy with Nanometer Scale Axial Resolution. NANO LETTERS 2020; 20:6038-6044. [PMID: 32597659 DOI: 10.1021/acs.nanolett.0c02056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The past two decades have witnessed a dramatic progress in the development of novel super-resolution fluorescence microscopy technologies. Here, we report a new fluorescence imaging method, called metamaterial-assisted photobleaching microscopy (MAPM), which possesses a nanometer-scale axial resolution and is suitable for broadband operation across the entire visible spectrum. The photobleaching kinetics of fluorophores can be greatly modified via a separation-dependent energy transfer process to a nearby metamaterial. The corresponding photobleaching rate is thus linked to the distance between the fluorophores and the metamaterial layer, leading to a reconstructed image with exceptionally high axial resolution. We apply the MAPM technology to image the HeLa cell membranes tagged with fluorescent proteins and demonstrate an axial resolution of ∼2.4 nm with multiple colors. MAPM utilizes a metamaterial-coated substrate to achieve super-resolution without altering anything else in a conventional microscope, representing a simple solution for fluorescence imaging at nanometer axial resolution.
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Affiliation(s)
- Yeon Ui Lee
- Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Junxiang Zhao
- Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Gary C H Mo
- Department of Pharmacology, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
- Department of Pharmacology, University of Illinois at Chicago, 835 S. Wolcott Avenue, Chicago, Illinois 60612, United States
| | - Shilong Li
- Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Guangru Li
- Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Qian Ma
- Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Qingqing Yang
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Ratnesh Lal
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
- Department of Bioengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Jin Zhang
- Department of Pharmacology, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Zhaowei Liu
- Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
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23
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Dual-Color Metal-Induced Energy Transfer (MIET) Imaging for Three-Dimensional Reconstruction of Nuclear Envelope Architecture. Methods Mol Biol 2020. [PMID: 32681482 DOI: 10.1007/978-1-0716-0763-3_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
The nuclear envelope, comprising the inner and the outer nuclear membrane, separates the nucleus from the cytoplasm and plays a key role in cellular functions. Nuclear pore complexes (NPCs) are embedded in the nuclear envelope and control transport of macromolecules between the two compartments. Recently, it has been shown that the axial distance between the inner nuclear membrane and the cytoplasmic side of the NPC can be measured using dual-color metal-induced energy transfer (MIET). This chapter focuses on experimental aspects of this method and discusses the details of data analysis.
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24
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Oleksiievets N, Thiele JC, Weber A, Gregor I, Nevskyi O, Isbaner S, Tsukanov R, Enderlein J. Wide-Field Fluorescence Lifetime Imaging of Single Molecules. J Phys Chem A 2020; 124:3494-3500. [PMID: 32255633 DOI: 10.1021/acs.jpca.0c01513] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Fluorescence lifetime imaging (FLIM) has become an important microscopy technique in bioimaging. The two most important of its applications are lifetime-multiplexing for imaging many different structures in parallel, and lifetime-based measurements of Förster resonance energy transfer. There are two principal FLIM techniques, one based on confocal-laser scanning microscopy (CLSM) and time-correlated single-photon counting (TCSPC) and the other based on wide-field microscopy and phase fluorometry. Although the first approach (CLSM-TCSPC) assures high sensitivity and allows one to detect single molecules, it is slow and has a small photon yield. The second allows, in principal, high frame rates (by 2-3 orders of magnitude faster than CLSM), but it suffers from low sensitivity, which precludes its application for single-molecule imaging. Here, we demonstrate that a novel wide-field TCSPC camera (LINCam25, Photonscore GmbH) can be successfully used for single-molecule FLIM, although its quantum yield of detection in the red spectral region is only ∼5%. This is due to the virtually absent background and readout noise of the camera, assuring high signal-to-noise ratio even at low detection efficiency. We performed single-molecule FLIM of different red fluorophores, and we use the lifetime information for successfully distinguishing between different molecular species. Finally, we demonstrate single-molecule metal-induced energy transfer (MIET) imaging which is a first step for three-dimensional single-molecule localization microscopy (SMLM) with nanometer resolution.
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Affiliation(s)
- Nazar Oleksiievets
- III. Institute of Physics-Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Jan Christoph Thiele
- III. Institute of Physics-Biophysics, Georg August University, 37077 Göttingen, Germany
| | - André Weber
- Special Laboratory for Electron and Laser Scanning Microscopy, Leibniz Institute for Neurobiology, 39118 Magdeburg, Germany
| | - Ingo Gregor
- III. Institute of Physics-Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Oleksii Nevskyi
- III. Institute of Physics-Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Sebastian Isbaner
- III. Institute of Physics-Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Roman Tsukanov
- III. Institute of Physics-Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Jörg Enderlein
- III. Institute of Physics-Biophysics, Georg August University, 37077 Göttingen, Germany.,Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), Georg August University, 37077 Göttingen, Germany
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25
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Figueiras E, Silvestre OF, Ihalainen TO, Nieder JB. Phasor-assisted nanoscopy reveals differences in the spatial organization of major nuclear lamina proteins. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2019; 1866:118530. [PMID: 31415840 DOI: 10.1016/j.bbamcr.2019.118530] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 07/18/2019] [Accepted: 08/05/2019] [Indexed: 11/15/2022]
Abstract
Phasor-assisted Metal Induced Energy Transfer-Fluorescence Lifetime Imaging Microscopy (MIET-FLIM) nanoscopy is introduced as a powerful tool for functional cell biology research. Thin metal substrates can be used to obtain axial super-resolution via nanoscale distance-dependent MIET from fluorescent dyes towards a nearby metal layer, thereby creating fluorescence lifetime contrast between dyes located at different nanoscale distance from the metal. Such data can be used to achieve axially super-resolved microscopy images, a process known as MIET-FLIM nanoscopy. Suitability of the phasor approach in MIET-FLIM nanoscopy is first demonstrated using nanopatterned substrates, and furthermore applied to characterize the distance distribution of the epithelial basal membrane of a biological cell from the gold substrate. The phasor plot of an entire cell can be used to characterize the full Förster resonance energy transfer (FRET) trajectory as a large distance heterogeneity within the sensing range of about 100 nm from the metal surface is present due to the extended shape of cell with curvatures. In contrast, the different proteins of nuclear lamina show strong confinement close to the nuclear envelope in nanoscale. We find the lamin B layer resides in average at shorter distances from the gold surface compared to the lamin A/C layer located in more extended ranges. This and the observed heterogeneity of the protein layer thicknesses suggests that A- and B-type lamins form distinct networks in the nuclear lamina. Our results provide detailed insights for the study of the different roles of lamin proteins in chromatin tethering and nuclear mechanics.
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Affiliation(s)
- Edite Figueiras
- Department of Nanophotonics, Ultrafast Bio- and Nanophotonics Group, INL - International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal
| | - Oscar F Silvestre
- Department of Nanophotonics, Ultrafast Bio- and Nanophotonics Group, INL - International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal
| | - Teemu O Ihalainen
- Faculty of Medicine and Health Technology, BioMediTech, Tampere University, 33014 Tampere, Finland
| | - Jana B Nieder
- Department of Nanophotonics, Ultrafast Bio- and Nanophotonics Group, INL - International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal.
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26
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Cavallini F, Tarantola M. ECIS based wounding and reorganization of cardiomyocytes and fibroblasts in co-cultures. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2019; 144:116-127. [DOI: 10.1016/j.pbiomolbio.2018.06.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 06/22/2018] [Accepted: 06/26/2018] [Indexed: 12/11/2022]
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27
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Fu R, Su Y, Wang R, Lin X, Jiang K, Jin X, Yang H, Ma L, Luo X, Lu Y, Huang G. Label-free tomography of living cellular nanoarchitecture using hyperspectral self-interference microscopy. BIOMEDICAL OPTICS EXPRESS 2019; 10:2757-2767. [PMID: 31259049 PMCID: PMC6583342 DOI: 10.1364/boe.10.002757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 04/11/2019] [Accepted: 04/24/2019] [Indexed: 06/09/2023]
Abstract
Quantitative phase imaging (QPI) is the most ideal method for achieving long-term cellular tomography because it is label free and quantitative. However, for current QPI instruments, interference signals from different layers overlay with each other and impede nanoscale optical sectioning. Integrated incubators and improved configurations also require further investigation for QPI instruments. In this work, hyperspectral self-reflectance microscopy is proposed to achieve label-free tomography of living cellular nanoarchitecture. The optical description and tomography reconstruction algorithm were proposed so that the quantitative morphological structure of the entire living cell can be acquired with 89.2 nm axial resolution and 1.91 nm optical path difference sensitivity. A cell incubator was integrated to culture living cells for in situ measurement and expensive precise optical components were not needed. The proposed system can reveal native and dynamic cellular nanoscale structure, providing an alternative approach for long-term monitoring and quantitative analysis of living cells.
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Affiliation(s)
- Rongxin Fu
- Department of Biomedical Engineering, the School of Medicine, Tsinghua University, Beijing 100084, China
- Contributed equally as co-authors
| | - Ya Su
- Department of Biomedical Engineering, the School of Medicine, Tsinghua University, Beijing 100084, China
- Contributed equally as co-authors
| | - Ruliang Wang
- Department of Biomedical Engineering, the School of Medicine, Tsinghua University, Beijing 100084, China
| | - Xue Lin
- Department of Biomedical Engineering, the School of Medicine, Tsinghua University, Beijing 100084, China
| | - Kai Jiang
- Department of Biomedical Engineering, the School of Medicine, Tsinghua University, Beijing 100084, China
| | - Xiangyu Jin
- Department of Biomedical Engineering, the School of Medicine, Tsinghua University, Beijing 100084, China
| | - Han Yang
- Department of Biomedical Engineering, the School of Medicine, Tsinghua University, Beijing 100084, China
| | - Li Ma
- National Engineering Research Center for Beijing Biochip Technology, Beijing 102206, China
| | - Xianbo Luo
- National Engineering Research Center for Beijing Biochip Technology, Beijing 102206, China
| | - Ying Lu
- Department of Biomedical Engineering, the School of Medicine, Tsinghua University, Beijing 100084, China
| | - Guoliang Huang
- Department of Biomedical Engineering, the School of Medicine, Tsinghua University, Beijing 100084, China
- National Engineering Research Center for Beijing Biochip Technology, Beijing 102206, China
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28
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Chen Y, Mao B, Peng X, Zhou Y, Xia K, Guo H, Jiang H, Wang G, Zhuang W. A Comparative Study of Genetic Profiles of Key Oncogenesis-Related Genes between Primary Lesions and Matched Lymph Nodes Metastasis in Lung Cancer. J Cancer 2019; 10:1642-1650. [PMID: 31205520 PMCID: PMC6548007 DOI: 10.7150/jca.28266] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 01/10/2019] [Indexed: 12/16/2022] Open
Abstract
Background: The genetic heterogeneity between primary and metastatic lesions has rarely studied. Purpose: This study aims to compare the mutation profiling of key cancer-related genes in primary lung cancers and their matched lymph nodes (LN) metastasis. Methods: The gene mutation profiling of both primary cancers and their matched LN metastasis was constructed using a hybridization capture-based massively parallel sequencing assay and the sequencing of 1,408 key cancer genes in 37 NSCLC patients. Results: There are differences in the repertoire of somatic mutations and CNVs between primary lesions and metastatic lymphatic lesions in NSCLC. More mutations were discovered in the primary lesion than LN metastasis lesion, indicating that tumor mutation burden is higher in primary lesion than that in LN metastasis lesion. The copy number profiles were largely preserved through the progression of the metastasis in lung cancer individually. Regarding to the mutation context, more prevailing of signature 1 in LN metastasis lesion was observed than that of primary lesion, indicating that the spontaneous deamination of cytosine may contribute to the accumulation of mutations during tumor development and immigration. Furthermore, the LN metastasis exclusive somatic mutation (LME-SMs) genes were enriched in peptidyl-tyrosine phosphorylation, peptidyl-tyrosine modification, protein tyrosine kinase activity, and transmembrane receptor protein kinase. The KEGG pathway analysis revealed that these genes might participate in the PI3K-Akt signaling pathway, MAPK signaling pathway and Ras signaling pathway. Conclusion: Since the heterogeneity of genetic profiling exists between primary lesion and LN metastasis lesion, multi-region lesion mutation profiling is required to fully understand the progression of NSCLC, and develop an appropriate therapeutic guide. Mutations in genes involved in cell proliferation, invasion and migration may be the genetic mechanism of metastasis.
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Affiliation(s)
- Yuqiao Chen
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, 410008 Changsha, Hunan, People's Republic of China
| | - Beibei Mao
- Beijing Genecast Biotechnology Co. 100000 Beijing, People's Republic of China
| | - Xiong Peng
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, 410008 Changsha, Hunan, People's Republic of China
| | - Yuan Zhou
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, 410008 Changsha, Hunan, People's Republic of China
| | - Kun Xia
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, 410008 Changsha, Hunan, People's Republic of China
| | - Hao Guo
- Beijing Genecast Biotechnology Co. 100000 Beijing, People's Republic of China
| | - Hong Jiang
- Department of Neurology, Xiangya Hospital, Central South University, 410008, Changsha, Hunan, People's Republic of China
| | - Guo Wang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, People's Republic of China
| | - Wei Zhuang
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, 410008 Changsha, Hunan, People's Republic of China
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29
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Chizhik AM, Ruhlandt D, Pfaff J, Karedla N, Chizhik AI, Gregor I, Kehlenbach RH, Enderlein J. Three-Dimensional Reconstruction of Nuclear Envelope Architecture Using Dual-Color Metal-Induced Energy Transfer Imaging. ACS NANO 2017; 11:11839-11846. [PMID: 28921961 DOI: 10.1021/acsnano.7b04671] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The nuclear envelope, comprising the inner and the outer nuclear membrane, separates the nucleus from the cytoplasm and plays a key role in cellular functions. Nuclear pore complexes (NPCs), which are embedded in the nuclear envelope, control transport of macromolecules between the two compartments. Here, using dual-color metal-induced energy transfer (MIET), we determine the axial distance between Lap2β and Nup358 as markers for the inner nuclear membrane and the cytoplasmic side of the NPC, respectively. Using MIET imaging, we reconstruct the 3D profile of the nuclear envelope over the whole basal area, with an axial resolution of a few nanometers. This result demonstrates that optical microscopy can achieve nanometer axial resolution in biological samples and without recourse to complex interferometric approaches.
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Affiliation(s)
- Anna M Chizhik
- Third Institute of Physics, University of Göttingen , 37077 Göttingen, Germany
| | - Daja Ruhlandt
- Third Institute of Physics, University of Göttingen , 37077 Göttingen, Germany
| | - Janine Pfaff
- Universitätsmedizin Göttingen, University of Göttingen, Department of Molecular Biology, GZMB , 37073 Göttingen, Germany
| | - Narain Karedla
- Third Institute of Physics, University of Göttingen , 37077 Göttingen, Germany
| | - Alexey I Chizhik
- Third Institute of Physics, University of Göttingen , 37077 Göttingen, Germany
| | - Ingo Gregor
- Third Institute of Physics, University of Göttingen , 37077 Göttingen, Germany
| | - Ralph H Kehlenbach
- Universitätsmedizin Göttingen, University of Göttingen, Department of Molecular Biology, GZMB , 37073 Göttingen, Germany
| | - Jörg Enderlein
- Third Institute of Physics, University of Göttingen , 37077 Göttingen, Germany
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30
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Covell AD, Zeng Z, Mabe T, Wei J, Adamson A, LaJeunesse DR. Alternative SiO 2 Surface Direct MDCK Epithelial Behavior. ACS Biomater Sci Eng 2017; 3:3307-3317. [PMID: 33445372 DOI: 10.1021/acsbiomaterials.7b00645] [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] [Indexed: 11/30/2022]
Abstract
The mechanical interactions of cells are mediated through adhesive interactions. In this study, we examined the growth, cellular behavior, and adhesion of MDCK epithelial cells on three different SiO2 substrates: amorphous glass coverslips and the silicon oxide layers that grow on ⟨111⟩ and ⟨100⟩ wafers. While compositionally all three substrates are almost similar, differences in surface energy result in dramatic differences in epithelial cell morphology, cell-cell adhesion, cell-substrate adhesion, actin organization, and extracellular matrix (ECM) protein expression. We also observe striking differences in ECM protein binding to the various substrates due to the hydrogen bond interactions. Our results demonstrate that MDCK cells have a robust response to differences in substrates that is not obviated by nanotopography or surface composition and that a cell's response may manifest through subtle differences in surface energies of the materials. This work strongly suggests that other properties of a material other than composition and topology should be considered when interpreting and controlling interactions of cells with a substrate, whether it is synthetic or natural.
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Affiliation(s)
- Alan D Covell
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, The University of North Carolina at Greensboro, 2907 East Gate City Blvd., Greensboro, North Carolina 27401, United States
| | - Zheng Zeng
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, The University of North Carolina at Greensboro, 2907 East Gate City Blvd., Greensboro, North Carolina 27401, United States
| | - Taylor Mabe
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, The University of North Carolina at Greensboro, 2907 East Gate City Blvd., Greensboro, North Carolina 27401, United States
| | - Jianjun Wei
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, The University of North Carolina at Greensboro, 2907 East Gate City Blvd., Greensboro, North Carolina 27401, United States
| | - Amy Adamson
- Department of Biology, The University of North Carolina at Greensboro, 201 Eberhart Building, Greensboro, North Carolina 27402, United States
| | - Dennis R LaJeunesse
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, The University of North Carolina at Greensboro, 2907 East Gate City Blvd., Greensboro, North Carolina 27401, United States
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