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Chen Y, Yan X, Yuan F, Lin L, Wang S, Ye J, Zhang J, Yang M, Wu D, Wang X, Yu J. Kartogenin-Conjugated Double-Network Hydrogel Combined with Stem Cell Transplantation and Tracing for Cartilage Repair. Adv Sci (Weinh) 2022; 9:e2105571. [PMID: 36253092 PMCID: PMC9762312 DOI: 10.1002/advs.202105571] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 09/01/2022] [Indexed: 06/16/2023]
Abstract
The effectiveness of existing tissue-engineering cartilage (TEC) is known to be hampered by weak integration of biocompatibility, biodegradation, mechanical strength, and microenvironment supplies. The strategy of hydrogel-based TEC holds considerable promise in circumventing these problems. Herein, a non-toxic, biodegradable, and mechanically optimized double-network (DN) hydrogel consisting of polyethylene glycol (PEG) and kartogenin (KGN)-conjugated chitosan (CHI) is constructed using a simple soaking strategy. This PEG-CHI-KGN DN hydrogel possesses favorable architectures, suitable mechanics, remarkable cellular affinity, and sustained KGN release, which can facilitate the cartilage-specific genes expression and extracellular matrix secretion of peripheral blood-derived mesenchymal stem cells (PB-MSCs). Notably, after tracing the transplanted cells by detecting the rabbit sex-determining region Y-linked gene sequence, the allogeneic PB-MSCs are found to survive for even 3 months in the regenerated cartilage. Here, the long-term release of KGN is able to efficiently and persistently activate multiple genes and signaling pathways to promote the chondrogenesis, chondrocyte differentiation, and survival of PB-MSCs. Thus, the regenerated tissues exhibit well-matched histomorphology and biomechanical performance such as native cartilage. Consequently, it is believed this innovative work can expand the choice for developing the next generation of orthopedic implants in the loadbearing region of a living body.
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Affiliation(s)
- You‐Rong Chen
- Department of Sports MedicineBeijing Key Laboratory of Sports InjuriesPeking University Third HospitalBeijing100191China
- Institute of Sports MedicinePeking UniversityBeijing100191China
| | - Xin Yan
- Department of Sports MedicineBeijing Key Laboratory of Sports InjuriesPeking University Third HospitalBeijing100191China
- Institute of Sports MedicinePeking UniversityBeijing100191China
| | - Fu‐Zhen Yuan
- Department of Sports MedicineBeijing Key Laboratory of Sports InjuriesPeking University Third HospitalBeijing100191China
- Institute of Sports MedicinePeking UniversityBeijing100191China
| | - Lin Lin
- Department of Sports MedicineBeijing Key Laboratory of Sports InjuriesPeking University Third HospitalBeijing100191China
- Institute of Sports MedicinePeking UniversityBeijing100191China
| | - Shao‐Jie Wang
- Department of Joint Surgery and Sports Medicine, Zhongshan HospitalXiamen UniversityXiamen361000China
| | - Jing Ye
- Department of Sports MedicineBeijing Key Laboratory of Sports InjuriesPeking University Third HospitalBeijing100191China
- Institute of Sports MedicinePeking UniversityBeijing100191China
| | - Ji‐Ying Zhang
- Department of Sports MedicineBeijing Key Laboratory of Sports InjuriesPeking University Third HospitalBeijing100191China
- Institute of Sports MedicinePeking UniversityBeijing100191China
| | - Meng Yang
- Department of Sports MedicineBeijing Key Laboratory of Sports InjuriesPeking University Third HospitalBeijing100191China
- Institute of Sports MedicinePeking UniversityBeijing100191China
| | - De‐Cheng Wu
- Department of Biomedical EngineeringSouthern University of Science and TechnologyShenzhen518055China
| | - Xing Wang
- Beijing National Laboratory for Molecular SciencesState Key Laboratory of Polymer Physics and ChemistryInstitute of Chemistry Chinese Academy of SciencesBeijing100190China
| | - Jia‐Kuo Yu
- Department of Sports MedicineBeijing Key Laboratory of Sports InjuriesPeking University Third HospitalBeijing100191China
- Institute of Sports MedicinePeking UniversityBeijing100191China
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Tan W, Wang Y, Chen Y, Chen C. Cell tracing reveals the transdifferentiation fate of mouse lung epithelial cells during pulmonary fibrosis in vivo. Exp Ther Med 2021; 22:1188. [PMID: 34475978 PMCID: PMC8406816 DOI: 10.3892/etm.2021.10622] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 06/22/2021] [Indexed: 12/17/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive and devastating interstitial lung disease. The origin of myofibroblasts is still to be elucidated and the existence of epithelial-mesenchymal transition (EMT) in IPF remains controversial. Hence, it is important to clarify the origin of fibroblasts by improving modeling and labeling methods and analyzing the differentiation pathway of alveolar epithelial cells (AEC) in pulmonary fibrosis with cell tracking technology. In the present study, adult transgenic mice with SPC-rtTA+/-/tetO7-CMV-Cre+/-/mTmG+/- were induced with doxycycline for 15 days. The gene knockout phenomenon occurred in type II AECs in the lung and the reporter gene cell membrane-localized enhanced green fluorescence protein (mEGFP) was expressed in the cell membrane. The expression of Cre recombinase and SPC was analyzed using immunohistochemical (IHC) staining to detect the labeling efficiency. A repetitive intraperitoneal bleomycin-induced pulmonary fibrosis model was established, and the mice were sacrificed on day 28. The co-localization of mEGFP and mesenchymal markers α-smooth muscle actin (α-SMA) and S100 calcium binding protein A4 (S100A4) were detected by multiple IHC staining. The results revealed that Cre was expressed in the airway and AECs in the lung tissue of adult transgenic mice with SPC-rtTA+/-/tetO7-CMV-Cre+/-/mTmG+/- induced by doxycycline; the labeling efficiency in the peripheral lung tissue was 63.27±7.51%. mEGFP was expressed on the membrane of type II AECs and their differentiated form of type I AECs. Expression of mEGFP was mainly observed in the fibrotic region in bleomycin-induced pulmonary fibrosis; 1.94±0.08% of α-SMA-positive cells were mEGFP-positive and 9.68±2.06% of S100A4-positive cells were mEGFP-positive in bleomycin-induced pulmonary fibrosis. In conclusion, the present results suggested that while EMT contributes to the pathogenesis of pulmonary fibrosis, it is not the major causative factor of this condition.
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Affiliation(s)
- Wei Tan
- Department of Developmental Cell Biology, Key Laboratory of Cell Biology of The Ministry of Public Health, Key Laboratory of Medical Cell Biology of The Ministry of Education, China Medical University, Shenyang, Liaoning 110122, P.R. China.,Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Yaru Wang
- Department of Developmental Cell Biology, Key Laboratory of Cell Biology of The Ministry of Public Health, Key Laboratory of Medical Cell Biology of The Ministry of Education, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Yuhua Chen
- Department of Developmental Cell Biology, Key Laboratory of Cell Biology of The Ministry of Public Health, Key Laboratory of Medical Cell Biology of The Ministry of Education, China Medical University, Shenyang, Liaoning 110122, P.R. China
| | - Cheng Chen
- Department of Developmental Cell Biology, Key Laboratory of Cell Biology of The Ministry of Public Health, Key Laboratory of Medical Cell Biology of The Ministry of Education, China Medical University, Shenyang, Liaoning 110122, P.R. China
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3
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Rodrigues PV, Tostes K, Bosque BP, de Godoy JVP, Amorim Neto DP, Dias CSB, Fonseca MDC. Illuminating the Brain With X-Rays: Contributions and Future Perspectives of High-Resolution Microtomography to Neuroscience. Front Neurosci 2021; 15:627994. [PMID: 33815039 PMCID: PMC8010130 DOI: 10.3389/fnins.2021.627994] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 02/26/2021] [Indexed: 12/27/2022] Open
Abstract
The assessment of three-dimensional (3D) brain cytoarchitecture at a cellular resolution remains a great challenge in the field of neuroscience and constant development of imaging techniques has become crucial, particularly when it comes to offering direct and clear obtention of data from macro to nano scales. Magnetic resonance imaging (MRI) and electron or optical microscopy, although valuable, still face some issues such as the lack of contrast and extensive sample preparation protocols. In this context, x-ray microtomography (μCT) has become a promising non-destructive tool for imaging a broad range of samples, from dense materials to soft biological specimens. It is a new supplemental method to be explored for deciphering the cytoarchitecture and connectivity of the brain. This review aims to bring together published works using x-ray μCT in neurobiology in order to discuss the achievements made so far and the future of this technique for neuroscience.
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Affiliation(s)
- Paulla Vieira Rodrigues
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
- Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - Katiane Tostes
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Beatriz Pelegrini Bosque
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
- Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - João Vitor Pereira de Godoy
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
- Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - Dionisio Pedro Amorim Neto
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
- Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - Carlos Sato Baraldi Dias
- Brazilian Synchrotron Light National Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Matheus de Castro Fonseca
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
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4
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Engelmann C, Riemann M, Carlstedt S, Grimlowski R, Andreas N, Koliesnik I, Meier E, Austerfield P, Haenold R. Identification of undescribed Relb expression domains in the murine brain by new Relb:cre-katushka reporter mice. Dev Dyn 2020; 249:983-997. [PMID: 32145043 DOI: 10.1002/dvdy.170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 02/07/2020] [Accepted: 02/27/2020] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Noncanonical NF-κB signaling through activation of the transcription factor RelB acts as key regulator of cell lineage determination and differentiation in various tissues including the immune system. To elucidate temporospatial aspects of Relb expression, we generated a BAC transgenic knock-in mouse expressing the fluorescent protein Katushka and the enzyme Cre recombinase under control of the murine Relb promoter (RelbCre-Kat mice). RESULTS Co-expression of Katushka and Relb in fibroblast cultures and tissues of transgenic mice revealed highly specific reporter functions of the transgene. Crossing RelbCre-Kat mice with ROSA26R reporter mice that allow for Cre-mediated consecutive β-galactosidase or YFP synthesis identified various Relb expression domains in perinatal and mature mice. Besides thymus and spleen, highly specific expression patterns were found in different neuronal domains, as well as in other nonimmune organs including skin, skeletal structures and kidney. De novo Relb expression in the mature brain was confirmed in conditional knockout mice with neuro-ectodermal Relb deletion. CONCLUSION Our results demonstrate the usability of RelbCre-Kat reporter mice for the detection of de novo and temporarily restricted Relb expression including cell and lineage tracing of Relb expressing cells. Relb expression during mouse embryogenesis and at adulthood suggests, beyond immunity, important functions of this transcription factor in neurodevelopment and CNS function.
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Affiliation(s)
| | - Marc Riemann
- Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Jena, Germany
| | - Swen Carlstedt
- Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Jena, Germany.,Jena University Hospital, Institute of Biochemistry II, Center for Sepsis Control and Care, Jena, Germany
| | - Randy Grimlowski
- Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Jena, Germany.,Department of Vascular Cell Biology, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Nico Andreas
- Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Jena, Germany.,Jena University Hospital, Institute of Immunology, Jena, Germany
| | - Ievgen Koliesnik
- Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Jena, Germany.,School of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford University, Stanford, CA, USA
| | - Elke Meier
- Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Jena, Germany
| | | | - Ronny Haenold
- Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Jena, Germany
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5
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Carmona R, Barrena S, López Gambero AJ, Rojas A, Muñoz-Chápuli R. Epicardial cell lineages and the origin of the coronary endothelium. FASEB J 2020; 34:5223-5239. [PMID: 32068311 DOI: 10.1096/fj.201902249rr] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 01/07/2020] [Accepted: 02/02/2020] [Indexed: 11/11/2022]
Abstract
The embryonic epicardium generates a population of epicardial-derived mesenchymal cells (EPDC) whose contribution to the coronary endothelium is minor or, according to some reports, negligible. We have compared four murine cell-tracing models related to the EPDC in order to elucidate this contribution. Cre recombinase was expressed under control of the promoters of the Wilms' tumor suppressor (Wt1), the cardiac troponin (cTnT), and the GATA5 genes, activating expression of the R26REYFP reporter. We have also used the G2 enhancer of the GATA4 gene as a driver due to its activation in the proepicardium. Recombination was found in most of the epicardium/EPDC in all cases. The contribution of these lineages to the cardiac endothelium was analyzed using confocal microscopy and flow cytometry. G2-GATA4 lineage cells are the most frequent in the endothelium, probably due to the recruitment of circulating endothelial progenitors. The contribution of the WT1 cell lineage increases along gestation due to further endothelial expression of WT1. GATA5 and cTnT lineages represent 4% of the cardiac endothelial cells throughout the gestation, probably standing for the actual EPDC contribution to the coronary endothelium. These results suggest caution when using a sole cell-tracing model to study the fate of the EPDC.
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Affiliation(s)
- Rita Carmona
- Department of Animal Biology, Faculty of Science, University of Málaga, Málaga, Spain.,Andalusian Center for Nanomedicine and Biotechnology (BIONAND), Málaga, Spain.,Institute of Biomedical Research of Málaga (IBIMA), Málaga, Spain
| | - Silvia Barrena
- Department of Animal Biology, Faculty of Science, University of Málaga, Málaga, Spain.,Andalusian Center for Nanomedicine and Biotechnology (BIONAND), Málaga, Spain.,Institute of Biomedical Research of Málaga (IBIMA), Málaga, Spain
| | - Antonio Jesús López Gambero
- Department of Animal Biology, Faculty of Science, University of Málaga, Málaga, Spain.,Andalusian Center for Nanomedicine and Biotechnology (BIONAND), Málaga, Spain.,Institute of Biomedical Research of Málaga (IBIMA), Málaga, Spain
| | - Anabel Rojas
- Andalusian Center of Molecular Biology and Regenerative Medicine (CABIMER), Sevilla, Spain.,Center for Biomedical Research in Diabetes and Associated Metabolic Disorders (CIBERDEM), Sevilla, Spain
| | - Ramón Muñoz-Chápuli
- Department of Animal Biology, Faculty of Science, University of Málaga, Málaga, Spain.,Andalusian Center for Nanomedicine and Biotechnology (BIONAND), Málaga, Spain.,Institute of Biomedical Research of Málaga (IBIMA), Málaga, Spain
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6
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Bensimon-Brito A, Ramkumar S, Boezio GLM, Guenther S, Kuenne C, Helker CSM, Sánchez-Iranzo H, Iloska D, Piesker J, Pullamsetti S, Mercader N, Beis D, Stainier DYR. TGF-β Signaling Promotes Tissue Formation during Cardiac Valve Regeneration in Adult Zebrafish. Dev Cell 2019; 52:9-20.e7. [PMID: 31786069 DOI: 10.1016/j.devcel.2019.10.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 09/17/2019] [Accepted: 10/28/2019] [Indexed: 12/14/2022]
Abstract
Cardiac valve disease can lead to severe cardiac dysfunction and is thus a frequent cause of morbidity and mortality. Its main treatment is valve replacement, which is currently greatly limited by the poor recellularization and tissue formation potential of the implanted valves. As we still lack suitable animal models to identify modulators of these processes, here we used adult zebrafish and found that, upon valve decellularization, they initiate a rapid regenerative program that leads to the formation of new functional valves. After injury, endothelial and kidney marrow-derived cells undergo cell cycle re-entry and differentiate into new extracellular matrix-secreting valve cells. The TGF-β signaling pathway promotes the regenerative process by enhancing progenitor cell proliferation as well as valve cell differentiation. These findings reveal a key role for TGF-β signaling in cardiac valve regeneration and establish the zebrafish as a model to identify and test factors promoting cardiac valve recellularization and growth.
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Affiliation(s)
- Anabela Bensimon-Brito
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim 61231, Germany.
| | - Srinath Ramkumar
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim 61231, Germany
| | - Giulia L M Boezio
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim 61231, Germany
| | - Stefan Guenther
- Bioinformatics and Deep Sequencing Platform, Max Planck Institute for Heart and Lung Research, Bad Nauheim 61231, Germany
| | - Carsten Kuenne
- Bioinformatics Core Unit, Max Planck Institute for Heart and Lung Research, Bad Nauheim 61231, Germany
| | - Christian S M Helker
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim 61231, Germany
| | - Héctor Sánchez-Iranzo
- Cell Biology and Biophysics Research Unit, EMBL Heidelberg, Heidelberg 69117, Germany
| | - Dijana Iloska
- Department of Lung Development and Remodeling, Max Planck Institute for Heart and Lung Research, Bad Nauheim 61231, Germany
| | - Janett Piesker
- Scientific Service Group Microscopy, Max Planck Institute for Heart and Lung Research, Bad Nauheim 61231, Germany
| | - Soni Pullamsetti
- Department of Lung Development and Remodeling, Max Planck Institute for Heart and Lung Research, Bad Nauheim 61231, Germany
| | - Nadia Mercader
- Institute of Anatomy, University of Bern, Bern 3012, Switzerland; Centro Nacional de Investigaciones Cardiovasculares, CNIC, Madrid 28049, Spain
| | - Dimitris Beis
- Developmental Biology, Biomedical Research Foundation of the Academy of Athens, Athens 11527, Greece
| | - Didier Y R Stainier
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim 61231, Germany.
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7
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Fernandez-Antoran D, Piedrafita G, Murai K, Ong SH, Herms A, Frezza C, Jones PH. Outcompeting p53-Mutant Cells in the Normal Esophagus by Redox Manipulation. Cell Stem Cell 2019; 25:329-341.e6. [PMID: 31327664 PMCID: PMC6739485 DOI: 10.1016/j.stem.2019.06.011] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 05/14/2019] [Accepted: 06/14/2019] [Indexed: 12/20/2022]
Abstract
As humans age, normal tissues, such as the esophageal epithelium, become a patchwork of mutant clones. Some mutations are under positive selection, conferring a competitive advantage over wild-type cells. We speculated that altering the selective pressure on mutant cell populations may cause them to expand or contract. We tested this hypothesis by examining the effect of oxidative stress from low-dose ionizing radiation (LDIR) on wild-type and p53 mutant cells in the transgenic mouse esophagus. We found that LDIR drives wild-type cells to stop proliferating and differentiate. p53 mutant cells are insensitive to LDIR and outcompete wild-type cells following exposure. Remarkably, combining antioxidant treatment and LDIR reverses this effect, promoting wild-type cell proliferation and p53 mutant differentiation, reducing the p53 mutant population. Thus, p53-mutant cells can be depleted from the normal esophagus by redox manipulation, showing that external interventions may be used to alter the mutational landscape of an aging tissue.
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Affiliation(s)
| | | | - Kasumi Murai
- Wellcome Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Swee Hoe Ong
- Wellcome Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Albert Herms
- Wellcome Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Christian Frezza
- MRC Cancer Unit, University of Cambridge, Box 196, Cambridge Biomedical Campus, Cambridge CB2 0XZ, UK
| | - Philip H Jones
- Wellcome Sanger Institute, Hinxton, Cambridge CB10 1SA, UK; MRC Cancer Unit, University of Cambridge, Box 196, Cambridge Biomedical Campus, Cambridge CB2 0XZ, UK.
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8
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Salwig I, Spitznagel B, Vazquez-Armendariz AI, Khalooghi K, Guenther S, Herold S, Szibor M, Braun T. Bronchioalveolar stem cells are a main source for regeneration of distal lung epithelia in vivo. EMBO J 2019; 38:embj.2019102099. [PMID: 31028085 DOI: 10.15252/embj.2019102099] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 04/09/2019] [Accepted: 04/10/2019] [Indexed: 12/22/2022] Open
Abstract
Bronchioalveolar stem cells (BASCs) are a potential source for lung regeneration, but direct in vivo evidence for a multipotential lineage contribution during homeostasis and disease is critically missing, since specific genetic labeling of BASCs has not been possible. We developed a novel cell tracing approach based on intein-mediated assembly of newly engineered split-effectors, allowing selective targeting of dual-marker expressing BASCs in the mouse lung. RNA sequencing of isolated BASCs demonstrates that BASCs show a distinct transcriptional profile, characterized by co-expression of bronchiolar and alveolar epithelial genes. We found that BASCs generate the majority of distal lung airway cells after bronchiolar damage but only moderately contribute to cellular turnover under homeostatic conditions. Importantly, DTA-mediated ablation of BASCs compromised proper regeneration of distal airways. The study defines BASCs as crucial components of the lung repair machinery and provides a paradigmatic example for the detection and manipulation of stem cells that cannot be recognized by a single marker alone.
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Affiliation(s)
- Isabelle Salwig
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Member of the German Center for Lung Research (DZL), Bad Nauheim, Germany
| | - Birgit Spitznagel
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Member of the German Center for Lung Research (DZL), Bad Nauheim, Germany
| | - Ana Ivonne Vazquez-Armendariz
- Department of Internal Medicine II, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Keynoosh Khalooghi
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Member of the German Center for Lung Research (DZL), Bad Nauheim, Germany
| | - Stefan Guenther
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Member of the German Center for Lung Research (DZL), Bad Nauheim, Germany
| | - Susanne Herold
- Department of Internal Medicine II, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Marten Szibor
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Member of the German Center for Lung Research (DZL), Bad Nauheim, Germany
| | - Thomas Braun
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Member of the German Center for Lung Research (DZL), Bad Nauheim, Germany
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9
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Abstract
Interpreting the relative impact of cell autonomous patterning versus extrinsic microenvironmental influence on cell lineage determination represents a general challenge in developmental biology research. In the embryonic heart, this can be particularly difficult as regional differences in the expression of transcriptional regulators, paracrine/juxtacrine signaling cues, and hemodynamic force are all known to influence cardiomyocyte maturation. A simplified method to alter a developing cardiomyocyte's molecular and biomechanical microenvironment would, therefore, serve as a powerful technique to examine how local conditions influence cell fate and function. To address this, we have optimized a method to physically transplant juvenile cardiomyocytes into ectopic locations in the heart or the surrounding embryonic tissue. This allows us to examine how microenvironmental conditions influence cardiomyocyte fate transitions at single cell resolution within the intact embryo. Here, we describe a protocol in which embryonic myocytes can be isolated from a variety of cardiac sub-domains, dissociated, fluorescently labeled, and microinjected into host embryos with high precision. Cells can then be directly analyzed in situ using a variety of imaging and histological techniques. This protocol is a powerful alternative to traditional grafting experiments that can be prohibitively difficult in a moving tissue such as the heart. The general outline of this method can also be adapted to a variety of donor tissues and host environments, and its ease of use, low cost, and speed make it a potentially useful application for a variety of developmental studies.
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Affiliation(s)
- Trevor Henley
- Department of Cell Biology and Physiology, McAllister Heart Institute, University of North Carolina at Chapel Hill
| | - Kandace Thomas
- Department of Cell Biology and Physiology, McAllister Heart Institute, University of North Carolina at Chapel Hill
| | - Michael Bressan
- Department of Cell Biology and Physiology, McAllister Heart Institute, University of North Carolina at Chapel Hill;
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10
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Abstract
Molecular imaging has played an important role in the noninvasive exploration of multiple biological processes. Reporter gene imaging is a key part of molecular imaging. By combining with a reporter probe, a reporter protein can induce the accumulation of specific signals that are detectable by an imaging device to provide indirect information of reporter gene expression in living subjects. There are many types of reporter genes and each corresponding imaging technique has its own advantages and drawbacks. Fused reporter genes or single reporter genes with products detectable by multiple imaging modalities can compensate for the disadvantages and potentiate the advantages of each modality. Reporter gene multimodality imaging could be applied to trace implanted cells, monitor gene therapy, assess endogenous molecular events, screen drugs, etc. Although several types of multimodality imaging apparatus and multimodality reporter genes are available, more sophisticated detectors and multimodality reporter gene systems are needed.
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Affiliation(s)
- Mengting Li
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Province Key Laboratory of Molecular Imaging
| | - Yichun Wang
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Province Key Laboratory of Molecular Imaging
| | - Mei Liu
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Province Key Laboratory of Molecular Imaging
| | - Xiaoli Lan
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Province Key Laboratory of Molecular Imaging
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11
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Yamamoto-Fukuda T, Akiyama N, Takahashi M, Kojima H. Keratinocyte Growth Factor (KGF) Modulates Epidermal Progenitor Cell Kinetics through Activation of p63 in Middle Ear Cholesteatoma. J Assoc Res Otolaryngol 2018; 19:223-241. [PMID: 29549594 DOI: 10.1007/s10162-018-0662-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 02/28/2018] [Indexed: 01/27/2023] Open
Abstract
The basal stem/progenitor cell maintains homeostasis of the epidermis. Progressive disturbance of this homeostasis has been implicated as a possible cause in the pathogenesis of epithelial disease, such as middle ear cholesteatoma. In many cases of stem/progenitor cell regulation, the importance of extracellular signals provided by the surrounding cells is well-recognized. Keratinocyte growth factor (KGF) is a mesenchymal-cell-derived paracrine growth factor that specifically participates in skin homeostasis; however, the overexpression of KGF induces middle ear cholesteatoma. In this study, two kinds of thymidine analogs were transferred at different time points and we investigated the effects of overexpressed KGF on the cell kinetics of stem/progenitor cells in vivo. As a result, BrdU(+)EdU(+) cells (stem/progenitor cells) were detected in the thickened epithelium of KGF-transfected specimens. The use of a high-resolution microscope enabled us to analyze the phosphorylated level of p63 in individual nuclei, and the results clearly demonstrated that BrdU(+)EdU(+) cells are regarded as progenitor cells. In the overexpression of KGF, the stimulation of progenitor cell proliferation was inhibited by SU5402, an inhibitor for tyrosine kinase of KGFR. These findings indicate that KGF overexpression may increase stem/progenitor cell proliferation and block terminal differentiation, resulting in epithelial hyperplasia, which is typical in middle ear cholesteatoma.
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Affiliation(s)
- Tomomi Yamamoto-Fukuda
- Department of Otorhinolaryngology, Jikei University School of Medicine, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan. .,Department of Histology and Cell Biology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
| | - Naotaro Akiyama
- Department of Histology and Cell Biology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Department of Otorhinolaryngology, Toho University School of Medicine, Tokyo, Japan
| | - Masahiro Takahashi
- Department of Otorhinolaryngology, Jikei University School of Medicine, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Hiromi Kojima
- Department of Otorhinolaryngology, Jikei University School of Medicine, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
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12
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Gao H, Zhao X, Chen S. AIEgen-Based Fluorescent Nanomaterials: Fabrication and Biological Applications. Molecules 2018; 23:E419. [PMID: 29443927 PMCID: PMC6017469 DOI: 10.3390/molecules23020419] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 02/12/2018] [Accepted: 02/13/2018] [Indexed: 12/21/2022] Open
Abstract
In recent years, luminogens with the feature of aggregation-induced emission (AIEgen) have emerged as advanced luminescent materials for fluorescent nanomaterial preparation. AIEgen-based nanomaterials show enhanced fluorescence efficiency and superior photostability, which thusly offer unique advantages in biological applications. In this review, we will summarize the fabrication methods of AIEgen-based nanomaterials and their applications in in vitro/in vivo imaging, cell tracing, photodynamic therapy and drug delivery, focusing on the recent progress.
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Affiliation(s)
- Hui Gao
- Ming Wai Lau Centre for Reparative Medicine, Karolinska Institutet, Hong Kong, China.
| | - Xin Zhao
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
| | - Sijie Chen
- Ming Wai Lau Centre for Reparative Medicine, Karolinska Institutet, Hong Kong, China.
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13
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Mitrečić D, Alić I, Gorup D. Stem cells and stroke-how glowing neurons illuminate new paths. Neurogenesis (Austin) 2017; 4:e1304847. [PMID: 28573149 DOI: 10.1080/23262133.2017.1304847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 03/03/2017] [Accepted: 03/06/2017] [Indexed: 10/19/2022]
Abstract
A reliable method of cell tracing is essential in evaluating potential therapeutic procedures based on stem cell transplantation. Here we present data collected using neural stem cells isolated from a transgenic mouse line Thy1-YFP. When transplanted into a stroke affected brain these cells give rise to neurons that express a fluorescent signal which can be used for their detection and tracing. Observed processes were compared with those taking place during normal embryonic neurogenesis as well as during in vitro differentiation. Since the same neurogenic patterns were observed, we confirm that neural stem cell transplantation fits well into the paradigm of neuronal birth and differentiation.
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Affiliation(s)
- Dinko Mitrečić
- Laboratory for Stem Cells, Croatian Institute for Brain Research, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - Ivan Alić
- Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Dunja Gorup
- Laboratory for Stem Cells, Croatian Institute for Brain Research, School of Medicine, University of Zagreb, Zagreb, Croatia
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14
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Press AT, Ungelenk L, Rinkenauer AC, Gröger M, Lehmann F, Mosig A, Schubert US, Clemens MG, Bauer M. A new fluorescent dye for cell tracing and mitochondrial imaging in vitro and in vivo. J Biophotonics 2016; 9:888-900. [PMID: 26563981 DOI: 10.1002/jbio.201500190] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 09/14/2015] [Accepted: 09/25/2015] [Indexed: 06/05/2023]
Abstract
Mitochondria contribute to redox and calcium balance, and apoptosis thus regulating cellular fate. In the present study, mitochondrial staining applying a novel dye, V07-07059, was performed in human embryonic kidney cells, a human vascular endothelial cell line and primary human mononuclear cells. The new fluorescent mega Stokes dye (peak excitation: 488 nm, peak emission: 554 nm) showed superior fluorescent properties and stability. V07-07059 stains mitochondria dependent on their membrane potential and is safe to use in vitro and in vivo. Unlike other dyes applied in this context (e.g. Tetramethylrhodamine methyl ester), V07-07059 only marginally inhibits mitochondrial respiration and function. V07-07059 enables real time imaging of mitochondrial trafficking and remodeling. Prolonged staining with V07-07059 demonstrated the dyes suitability as a novel probe to track cells. In comparison to the widely used standard for cell proliferation and tracking studies 5(6)-diacetate N-succinimidyl ester, V07-07059 proved superior regarding toxicity and photostability.
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Affiliation(s)
- Adrian T Press
- Center for Sepsis Control & Care (CSCC), Jena University Hospital, Erlanger Allee 101, 07747, Jena, Germany
- Department of Anesthesiology & Critical Care, Jena University Hospital, Erlanger Allee 101, 07747, Jena
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
| | - Luisa Ungelenk
- Center for Sepsis Control & Care (CSCC), Jena University Hospital, Erlanger Allee 101, 07747, Jena, Germany
- Department of Anesthesiology & Critical Care, Jena University Hospital, Erlanger Allee 101, 07747, Jena
| | - Alexandra C Rinkenauer
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743, Jena, Germany
| | - Marko Gröger
- Institute of Biochemistry II, Jena University Hospital, Friedrich Schiller University, 07743, Jena, Germany
| | - Frank Lehmann
- Dyomics GmbH, Jena Germany, Otto-Schott-Str. 15, 07745, Jena, Germany
| | - Alexander Mosig
- Center for Sepsis Control & Care (CSCC), Jena University Hospital, Erlanger Allee 101, 07747, Jena, Germany
- Institute of Biochemistry II, Jena University Hospital, Friedrich Schiller University, 07743, Jena, Germany
| | - Ulrich S Schubert
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743, Jena, Germany
| | - Mark G Clemens
- Center for Sepsis Control & Care (CSCC), Jena University Hospital, Erlanger Allee 101, 07747, Jena, Germany
- Department of Biological Sciences and Center for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, North Carolina, 28223, USA
| | - Michael Bauer
- Center for Sepsis Control & Care (CSCC), Jena University Hospital, Erlanger Allee 101, 07747, Jena, Germany.
- Department of Anesthesiology & Critical Care, Jena University Hospital, Erlanger Allee 101, 07747, Jena.
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany.
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15
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Bigini P, Zanier ER, Saragozza S, Maciotta S, Romele P, Bonassi Signoroni P, Silini A, Pischiutta F, Sammali E, Balducci C, Violatto MB, Talamini L, Garry D, Moscatelli D, Ferrari R, Salmona M, De Simoni MG, Maggi F, Simoni G, Grati FR, Parolini O. Internalization of nanopolymeric tracers does not alter characteristics of placental cells. J Cell Mol Med 2016; 20:1036-48. [PMID: 26987908 PMCID: PMC4882978 DOI: 10.1111/jcmm.12820] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Accepted: 01/29/2016] [Indexed: 12/15/2022] Open
Abstract
In the cell therapy scenario, efficient tracing of transplanted cells is essential for investigating cell migration and interactions with host tissues. This is fundamental to provide mechanistic insights which altogether allow for the understanding of the translational potential of placental cell therapy in the clinical setting. Mesenchymal stem/stromal cells (MSC) from human placenta are increasingly being investigated for their potential in treating patients with a variety of diseases. In this study, we investigated the feasibility of using poly (methyl methacrylate) nanoparticles (PMMA‐NPs) to trace placental MSC, namely those from the amniotic membrane (hAMSC) and early chorionic villi (hCV‐MSC). We report that PMMP‐NPs are efficiently internalized and retained in both populations, and do not alter cell morphofunctional parameters. We observed that PMMP‐NP incorporation does not alter in vitro immune modulatory capability of placental MSC, a characteristic central to their reparative/therapeutic effects in vitro. We also show that in vitro, PMMP‐NP uptake is not affected by hypoxia. Interestingly, after in vivo brain ischaemia and reperfusion injury achieved by transient middle cerebral artery occlusion (tMCAo) in mice, iv hAMSC treatment resulted in significant improvement in cognitive function compared to PBS‐treated tMCAo mice. Our study provides evidence that tracing placental MSC with PMMP‐NPs does not alter their in vitro and in vivo functions. These observations are grounds for the use of PMMP‐NPs as tools to investigate the therapeutic mechanisms of hAMSC and hCV‐MSC in preclinical models of inflammatory‐driven diseases.
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Affiliation(s)
- Paolo Bigini
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Elisa R Zanier
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - Silvia Saragozza
- R&D Unit, TOMA Advanced Biomedical Assays S.p.A., Busto Arsizio, Varese, Italy
| | - Simona Maciotta
- R&D Unit, TOMA Advanced Biomedical Assays S.p.A., Busto Arsizio, Varese, Italy
| | - Pietro Romele
- Centro di Ricerca "E. Menni", Fondazione Poliambulanza Istituto Ospedaliero, Brescia, Italy
| | | | - Antonietta Silini
- Centro di Ricerca "E. Menni", Fondazione Poliambulanza Istituto Ospedaliero, Brescia, Italy
| | | | - Eliana Sammali
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy.,Fondazione IRCCS-Istituto Neurologico Carlo Besta, Milan, Italy
| | - Claudia Balducci
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | | | - Laura Talamini
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | - David Garry
- Centre for BioNano Interactions, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin, Ireland
| | - Davide Moscatelli
- Department of Chemistry, Material and Chemical Engineering, "Giulio Natta" Politecnico di Milano, Milan, Italy
| | - Raffaele Ferrari
- Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland
| | - Mario Salmona
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milano, Italy
| | | | - Federico Maggi
- R&D Unit, TOMA Advanced Biomedical Assays S.p.A., Busto Arsizio, Varese, Italy
| | - Giuseppe Simoni
- R&D Unit, TOMA Advanced Biomedical Assays S.p.A., Busto Arsizio, Varese, Italy
| | | | - Ornella Parolini
- Centro di Ricerca "E. Menni", Fondazione Poliambulanza Istituto Ospedaliero, Brescia, Italy
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16
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Feng G, Li K, Liu J, Ding D, Liu B. Bright single-chain conjugated polymer dots embedded nanoparticles for long-term cell tracing and imaging. Small 2014; 10:1212-1219. [PMID: 24339178 DOI: 10.1002/smll.201302161] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 10/12/2013] [Indexed: 06/03/2023]
Abstract
Single-chain conjugated polymer (CP) dots embedded nanoparticles (NPs) bearing cell penetration peptide (TAT) as surface ligands are synthesized for long term cancer cell tracing applications. The CPNPs are fabricated by matrix-encapsulation method and the embedded CPs can be modulated into spherical dots with different size upon alteration of feed concentrations. Single-chain CP dots are formed upon decreasing feed concentration to 0.2 mg/mL, where CPNPs exhibit highest fluorescence quantum yield of 32%. Maleimide is introduced as the new NP surface functional group, which favors easy conjugation with cell penetration peptide via click chemistry to preserve its biofunctions. The obtained CPNPs show high brightness and good biocompatibility, which allow cell tracing for over 9 generations, superior to commercial cell tracker Qtracker 585.
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Affiliation(s)
- Guangxue Feng
- Department of Chemical and Biomoelcular Engineering, National University of Singapore, 117576, Singapore; Environmental Research Institute, National University of Singapore, 117411, Singapore
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17
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Li K, Ding D, Prashant C, Qin W, Yang CT, Tang BZ, Liu B. Gadolinium-functionalized aggregation-induced emission dots as dual-modality probes for cancer metastasis study. Adv Healthc Mater 2013; 2:1600-5. [PMID: 23836611 DOI: 10.1002/adhm.201300135] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Indexed: 01/15/2023]
Abstract
Understanding the localization and engraftment of tumor cells at postintravasation stage of metastasis is of high importance in cancer diagnosis and treatment. Advanced fluorescent probes and facile methodologies for cell tracing play a key role in metastasis studies. In this work, we design and synthesize a dual-modality imaging dots with both optical and magnetic contrast through integration of a magnetic resonance imaging reagent, gadolinium(III), into a novel long-term cell tracing probe with aggregation-induced emission (AIE) in far-red/near-infrared region. The obtained fluorescent-magnetic AIE dots have both high fluorescence quantum yield (25%) and T1 relaxivity (7.91 mM(-1) s(-1) ) in aqueous suspension. After further conjugation with a cell membrane penetrating peptide, the dual-modality dots can be efficiently internalized into living cells. The gadolinium(III) allows accurate quantification of biodistribution of cancer cells via intraveneous injection, while the high fluorescence provides engraftment information of cells at single cellular level. The dual-modality AIE dots show obvious synergistic advantages over either single imaging modality and hold great promises in advanced biomedical studies.
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Affiliation(s)
- Kai Li
- Institute of Materials Research and Engineering, 3 Research Link, 117602, Singapore
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18
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Yang B, Cai H, Qin W, Zhang B, Zhai C, Jiang B, Wu Y. Bcl-2-functionalized ultrasmall superparamagnetic iron oxide nanoparticles coated with amphiphilic polymer enhance the labeling efficiency of islets for detection by magnetic resonance imaging. Int J Nanomedicine 2013; 8:3977-90. [PMID: 24204136 PMCID: PMC3804583 DOI: 10.2147/ijn.s52058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Based on their versatile, biocompatible properties, superparamagnetic iron oxide (SPIO) or ultrasmall superparamagnetic iron oxide (USPIO) nanoparticles are utilized for detecting and tracing cells or tumors in vivo. Here, we developed an innoxious and concise synthesis approach for a novel B-cell lymphoma (Bcl)-2 monoclonal antibody-functionalized USPIO nanoparticle coated with an amphiphilic polymer (carboxylated polyethylene glycol monooleyl ether [OE-PEG-COOH]). These nanoparticles can be effectively internalized by beta cells and label primary islet cells, at relatively low iron concentration. The biocompatibility and cytotoxicity of these products were investigated by comparison with the commercial USPIO product, FeraSpin™ S. We also assessed the safe dosage range of the product. Although some cases showed a hypointensity change at the site of transplant, a strong magnetic resonance imaging (MRI) was detectable by a clinical MRI scanner, at field strength of 3.0 Tesla, in vivo, and the iron deposition/attached in islets was confirmed by Prussian blue and immunohistochemistry staining. It is noteworthy that based on our synthesis approach, in future, we could exchange the Bcl-2 with other probes that would be more specific for the targeted cells and that would have better labeling specificity in vivo. The combined results point to the promising potential of the novel Bcl-2-functionalized PEG-USPIO as a molecular imaging agent for in vivo monitoring of islet cells or other cells.
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Affiliation(s)
- Bin Yang
- Department of Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
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