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Du Z, Li M, Chen G, Xiang M, Jia D, Cheng JX, Yang C. Mid-Infrared Photoacoustic Stimulation of Neurons through Vibrational Excitation in Polydimethylsiloxane. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2405677. [PMID: 38994890 DOI: 10.1002/advs.202405677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 06/26/2024] [Indexed: 07/13/2024]
Abstract
Photoacoustic (PA) emitters are emerging ultrasound sources offering high spatial resolution and ease of miniaturization. Thus far, PA emitters rely on electronic transitions of absorbers embedded in an expansion matrix such as polydimethylsiloxane (PDMS). Here, it is shown that mid-infrared vibrational excitation of C─H bonds in a transparent PDMS film can lead to efficient mid-infrared photoacoustic conversion (MIPA). MIPA shows 37.5 times more efficient than the commonly used PA emitters based on carbon nanotubes embedded in PDMS. Successful neural stimulation through MIPA both in a wide field with a size up to a 100 µm radius and in single-cell precision is achieved. Owing to the low heat conductivity of PDMS, less than a 0.5 °C temperature increase is found on the surface of a PDMS film during successful neural stimulation, suggesting a non-thermal mechanism. MIPA emitters allow repetitive wide-field neural stimulation, opening up opportunities for high-throughput screening of mechano-sensitive ion channels and regulators.
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Affiliation(s)
- Zhiyi Du
- Department of Chemistry, Boston University, Boston, MA, 02215, USA
| | - Mingsheng Li
- Department of Electrical and Computer Engineering, Boston University, Boston, MA, 02215, USA
| | - Guo Chen
- Department of Electrical and Computer Engineering, Boston University, Boston, MA, 02215, USA
| | - Maijie Xiang
- Division of Materials Science and Engineering, Boston University, Boston, MA, 02215, USA
| | - Danchen Jia
- Department of Electrical and Computer Engineering, Boston University, Boston, MA, 02215, USA
| | - Ji-Xin Cheng
- Department of Electrical and Computer Engineering, Boston University, Boston, MA, 02215, USA
- Department of Biomedical Engineering, Boston University, Boston, MA, 02215, USA
| | - Chen Yang
- Department of Chemistry, Boston University, Boston, MA, 02215, USA
- Department of Electrical and Computer Engineering, Boston University, Boston, MA, 02215, USA
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2
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Falconieri A, De Vincentiis S, Cappello V, Convertino D, Das R, Ghignoli S, Figoli S, Luin S, Català-Castro F, Marchetti L, Borello U, Krieg M, Raffa V. Axonal plasticity in response to active forces generated through magnetic nano-pulling. Cell Rep 2022; 42:111912. [PMID: 36640304 PMCID: PMC9902337 DOI: 10.1016/j.celrep.2022.111912] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 11/16/2022] [Accepted: 12/12/2022] [Indexed: 12/30/2022] Open
Abstract
Mechanical force is crucial in guiding axon outgrowth before and after synapse formation. This process is referred to as "stretch growth." However, how neurons transduce mechanical input into signaling pathways remains poorly understood. Another open question is how stretch growth is coupled in time with the intercalated addition of new mass along the entire axon. Here, we demonstrate that active mechanical force generated by magnetic nano-pulling induces remodeling of the axonal cytoskeleton. Specifically, the increase in the axonal density of microtubules induced by nano-pulling leads to an accumulation of organelles and signaling vesicles, which, in turn, promotes local translation by increasing the probability of assembly of the "translation factories." Modulation of axonal transport and local translation sustains enhanced axon outgrowth and synapse maturation.
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Affiliation(s)
| | - Sara De Vincentiis
- Department of Biology, Università di Pisa, 56127 Pisa, Italy,The Barcelona Institute of Science and Technology, Institut de Ciències Fotòniques, ICFO, 08860 Castelldefels, Spain
| | - Valentina Cappello
- Center for Materials Interfaces, Istituto Italiano di Tecnologia, 56025 Pontedera, Italy
| | - Domenica Convertino
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, 56127 Pisa, Italy
| | - Ravi Das
- The Barcelona Institute of Science and Technology, Institut de Ciències Fotòniques, ICFO, 08860 Castelldefels, Spain
| | | | - Sofia Figoli
- Department of Biology, Università di Pisa, 56127 Pisa, Italy
| | - Stefano Luin
- National Enterprise for NanoScience and NanoTechnology (NEST) Laboratory, Scuola Normale Superiore, 56127 Pisa, Italy
| | - Frederic Català-Castro
- The Barcelona Institute of Science and Technology, Institut de Ciències Fotòniques, ICFO, 08860 Castelldefels, Spain
| | - Laura Marchetti
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, 56127 Pisa, Italy,Department of Pharmacy, Università di Pisa, 56126 Pisa, Italy
| | - Ugo Borello
- Department of Biology, Università di Pisa, 56127 Pisa, Italy
| | - Michael Krieg
- The Barcelona Institute of Science and Technology, Institut de Ciències Fotòniques, ICFO, 08860 Castelldefels, Spain
| | - Vittoria Raffa
- Department of Biology, Università di Pisa, 56127 Pisa, Italy.
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3
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Montalà-Flaquer M, López-León CF, Tornero D, Houben AM, Fardet T, Monceau P, Bottani S, Soriano J. Rich dynamics and functional organization on topographically designed neuronal networks in vitro. iScience 2022; 25:105680. [PMID: 36567712 PMCID: PMC9768383 DOI: 10.1016/j.isci.2022.105680] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 10/05/2022] [Accepted: 11/23/2022] [Indexed: 11/27/2022] Open
Abstract
Neuronal cultures are a prominent experimental tool to understand complex functional organization in neuronal assemblies. However, neurons grown on flat surfaces exhibit a strongly coherent bursting behavior with limited functionality. To approach the functional richness of naturally formed neuronal circuits, here we studied neuronal networks grown on polydimethylsiloxane (PDMS) topographical patterns shaped as either parallel tracks or square valleys. We followed the evolution of spontaneous activity in these cultures along 20 days in vitro using fluorescence calcium imaging. The networks were characterized by rich spatiotemporal activity patterns that comprised from small regions of the culture to its whole extent. Effective connectivity analysis revealed the emergence of spatially compact functional modules that were associated with both the underpinned topographical features and predominant spatiotemporal activity fronts. Our results show the capacity of spatial constraints to mold activity and functional organization, bringing new opportunities to comprehend the structure-function relationship in living neuronal circuits.
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Affiliation(s)
- Marc Montalà-Flaquer
- Departament de Física de la Matèria Condensada, Universitat de Barcelona, E-08028 Barcelona, Spain,Universitat de Barcelona Institute of Complex Systems (UBICS), E-08028 Barcelona, Spain
| | - Clara F. López-León
- Departament de Física de la Matèria Condensada, Universitat de Barcelona, E-08028 Barcelona, Spain,Universitat de Barcelona Institute of Complex Systems (UBICS), E-08028 Barcelona, Spain
| | - Daniel Tornero
- Laboratory of Neural Stem Cells and Brain Damage, Institute of Neurosciences, University of Barcelona, E-08036 Barcelona, Spain
| | - Akke Mats Houben
- Departament de Física de la Matèria Condensada, Universitat de Barcelona, E-08028 Barcelona, Spain,Universitat de Barcelona Institute of Complex Systems (UBICS), E-08028 Barcelona, Spain
| | - Tanguy Fardet
- Laboratoire Matière et Systèmes Complexes, Université de Paris, UMR 7057 CNRS, Paris, France,University of Tübingen, Tübingen, Germany,Max Planck Institute for Biological Cybernetics, Tübingen, Germany
| | - Pascal Monceau
- Laboratoire Matière et Systèmes Complexes, Université de Paris, UMR 7057 CNRS, Paris, France
| | - Samuel Bottani
- Laboratoire Matière et Systèmes Complexes, Université de Paris, UMR 7057 CNRS, Paris, France
| | - Jordi Soriano
- Departament de Física de la Matèria Condensada, Universitat de Barcelona, E-08028 Barcelona, Spain,Universitat de Barcelona Institute of Complex Systems (UBICS), E-08028 Barcelona, Spain,Corresponding author
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4
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Geng J, Tang Y, Yu Z, Gao Y, Li W, Lu Y, Wang B, Zhou H, Li P, Liu N, Wang P, Fan Y, Yang Y, Guo ZV, Liu X. Chronic Ca 2+ imaging of cortical neurons with long-term expression of GCaMP-X. eLife 2022; 11:e76691. [PMID: 36196992 PMCID: PMC9699699 DOI: 10.7554/elife.76691] [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: 12/29/2021] [Accepted: 10/04/2022] [Indexed: 11/13/2022] Open
Abstract
Dynamic Ca2+ signals reflect acute changes in membrane excitability, and also mediate signaling cascades in chronic processes. In both cases, chronic Ca2+ imaging is often desired, but challenged by the cytotoxicity intrinsic to calmodulin (CaM)-based GCaMP, a series of genetically-encoded Ca2+ indicators that have been widely applied. Here, we demonstrate the performance of GCaMP-X in chronic Ca2+ imaging of cortical neurons, where GCaMP-X by design is to eliminate the unwanted interactions between the conventional GCaMP and endogenous (apo)CaM-binding proteins. By expressing in adult mice at high levels over an extended time frame, GCaMP-X showed less damage and improved performance in two-photon imaging of sensory (whisker-deflection) responses or spontaneous Ca2+ fluctuations, in comparison with GCaMP. Chronic Ca2+ imaging of one month or longer was conducted for cultured cortical neurons expressing GCaMP-X, unveiling that spontaneous/local Ca2+ transients progressively developed into autonomous/global Ca2+ oscillations. Along with the morphological indices of neurite length and soma size, the major metrics of oscillatory Ca2+, including rate, amplitude and synchrony were also examined. Dysregulations of both neuritogenesis and Ca2+ oscillations became discernible around 2-3 weeks after virus injection or drug induction to express GCaMP in newborn or mature neurons, which were exacerbated by stronger or prolonged expression of GCaMP. In contrast, neurons expressing GCaMP-X were significantly less damaged or perturbed, altogether highlighting the unique importance of oscillatory Ca2+ to neural development and neuronal health. In summary, GCaMP-X provides a viable solution for Ca2+ imaging applications involving long-time and/or high-level expression of Ca2+ probes.
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Affiliation(s)
- Jinli Geng
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
- X-Laboratory for Ion-Channel Engineering, Beihang UniversityBeijingChina
| | - Yingjun Tang
- Tsinghua-Peking Joint Center for Life Sciences, IDG/McGovern Institute for Brain Research, School of Medicine, Tsinghua UniversityBeijingChina
| | - Zhen Yu
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
- X-Laboratory for Ion-Channel Engineering, Beihang UniversityBeijingChina
| | - Yunming Gao
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
- X-Laboratory for Ion-Channel Engineering, Beihang UniversityBeijingChina
| | - Wenxiang Li
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
- X-Laboratory for Ion-Channel Engineering, Beihang UniversityBeijingChina
| | - Yitong Lu
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
- X-Laboratory for Ion-Channel Engineering, Beihang UniversityBeijingChina
| | - Bo Wang
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
- X-Laboratory for Ion-Channel Engineering, Beihang UniversityBeijingChina
| | - Huiming Zhou
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
- X-Laboratory for Ion-Channel Engineering, Beihang UniversityBeijingChina
- Tsinghua-Peking Joint Center for Life Sciences, IDG/McGovern Institute for Brain Research, School of Medicine, Tsinghua UniversityBeijingChina
| | - Ping Li
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
| | - Nan Liu
- Center for Life Sciences, School of Life Sciences, Yunnan UniversityKunmingChina
| | - Ping Wang
- Key Laboratory for Biomedical Engineering of Ministry of Education, Zhejiang UniversityHangzhouChina
| | - Yubo Fan
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
| | - Yaxiong Yang
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
| | - Zengcai V Guo
- Tsinghua-Peking Joint Center for Life Sciences, IDG/McGovern Institute for Brain Research, School of Medicine, Tsinghua UniversityBeijingChina
| | - Xiaodong Liu
- Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beihang UniversityBeijingChina
- X-Laboratory for Ion-Channel Engineering, Beihang UniversityBeijingChina
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5
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Basilico B, Palamà IE, D’Amone S, Lauro C, Rosito M, Grieco M, Ratano P, Cordella F, Sanchini C, Di Angelantonio S, Ragozzino D, Cascione M, Gigli G, Cortese B. Substrate stiffness effect on molecular crosstalk of epithelial-mesenchymal transition mediators of human glioblastoma cells. Front Oncol 2022; 12:983507. [PMID: 36091138 PMCID: PMC9454310 DOI: 10.3389/fonc.2022.983507] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 08/04/2022] [Indexed: 11/13/2022] Open
Abstract
The complexity of the microenvironment effects on cell response, show accumulating evidence that glioblastoma (GBM) migration and invasiveness are influenced by the mechanical rigidity of their surroundings. The epithelial–mesenchymal transition (EMT) is a well-recognized driving force of the invasive behavior of cancer. However, the primary mechanisms of EMT initiation and progression remain unclear. We have previously showed that certain substrate stiffness can selectively stimulate human GBM U251-MG and GL15 glioblastoma cell lines motility. The present study unifies several known EMT mediators to uncover the reason of the regulation and response to these stiffnesses. Our results revealed that changing the rigidity of the mechanical environment tuned the response of both cell lines through change in morphological features, epithelial-mesenchymal markers (E-, N-Cadherin), EGFR and ROS expressions in an interrelated manner. Specifically, a stiffer microenvironment induced a mesenchymal cell shape, a more fragmented morphology, higher intracellular cytosolic ROS expression and lower mitochondrial ROS. Finally, we observed that cells more motile showed a more depolarized mitochondrial membrane potential. Unravelling the process that regulates GBM cells’ infiltrative behavior could provide new opportunities for identification of new targets and less invasive approaches for treatment.
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Affiliation(s)
| | - Ilaria Elena Palamà
- National Research Council-Nanotechnology Institute (CNR Nanotec), Lecce, Italy
| | - Stefania D’Amone
- National Research Council-Nanotechnology Institute (CNR Nanotec), Lecce, Italy
| | - Clotilde Lauro
- Department of Physiology and Pharmacology, Sapienza University, Rome, Italy
| | - Maria Rosito
- Department of Physiology and Pharmacology, Sapienza University, Rome, Italy
- Center for Life Nanoscience, Italian Institute of Technology (IIT), Rome, Italy
| | - Maddalena Grieco
- National Research Council-Nanotechnology Institute (CNR Nanotec), Lecce, Italy
| | - Patrizia Ratano
- National Research Council-Nanotechnology Institute (CNR Nanotec), Rome, Italy
| | - Federica Cordella
- Center for Life Nanoscience, Italian Institute of Technology (IIT), Rome, Italy
| | - Caterina Sanchini
- Center for Life Nanoscience, Italian Institute of Technology (IIT), Rome, Italy
| | - Silvia Di Angelantonio
- Department of Physiology and Pharmacology, Sapienza University, Rome, Italy
- Center for Life Nanoscience, Italian Institute of Technology (IIT), Rome, Italy
| | - Davide Ragozzino
- Department of Physiology and Pharmacology, Sapienza University, Rome, Italy
| | | | - Giuseppe Gigli
- Department of Physiology and Pharmacology, Sapienza University, Rome, Italy
- Department of Mathematics and Physics “Ennio De Giorgi” University of Salento, Lecce, Italy
| | - Barbara Cortese
- National Research Council-Nanotechnology Institute (CNR Nanotec), Rome, Italy
- *Correspondence: Barbara Cortese,
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6
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The dual action of glioma-derived exosomes on neuronal activity: synchronization and disruption of synchrony. Cell Death Dis 2022; 13:705. [PMID: 35963860 PMCID: PMC9376103 DOI: 10.1038/s41419-022-05144-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 06/28/2022] [Accepted: 07/28/2022] [Indexed: 01/21/2023]
Abstract
Seizures represent a frequent symptom in gliomas and significantly impact patient morbidity and quality of life. Although the pathogenesis of tumor-related seizures is not fully understood, accumulating evidence indicates a key role of the peritumoral microenvironment. Brain cancer cells interact with neurons by forming synapses with them and by releasing exosomes, cytokines, and other small molecules. Strong interactions among neurons often lead to the synchronization of their activity. In this paper, we used an in vitro model to investigate the role of exosomes released by glioma cell lines and by patient-derived glioma stem cells (GSCs). The addition of exosomes released by U87 glioma cells to neuronal cultures at day in vitro (DIV) 4, when neurons are not yet synchronous, induces synchronization. At DIV 7-12 neurons become highly synchronous, and the addition of the same exosomes disrupts synchrony. By combining Ca2+ imaging, electrical recordings from single neurons with patch-clamp electrodes, substrate-integrated microelectrode arrays, and immunohistochemistry, we show that synchronization and de-synchronization are caused by the combined effect of (i) the formation of new neuronal branches, associated with a higher expression of Arp3, (ii) the modification of synaptic efficiency, and (iii) a direct action of exosomes on the electrical properties of neurons, more evident at DIV 7-12 when the threshold for spike initiation is significantly reduced. At DIV 7-12 exosomes also selectively boost glutamatergic signaling by increasing the number of excitatory synapses. Remarkably, de-synchronization was also observed with exosomes released by glioma-associated stem cells (GASCs) from patients with low-grade glioma but not from patients with high-grade glioma, where a more variable outcome was observed. These results show that exosomes released from glioma modify the electrical properties of neuronal networks and that de-synchronization caused by exosomes from low-grade glioma can contribute to the neurological pathologies of patients with brain cancers.
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