1
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Hegde S, Modi S, Deihl EW, Glomb OV, Yogev S, Hoerndli FJ, Koushika SP. Axonal mitochondria regulate gentle touch response through control of axonal actin dynamics. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.08.13.607780. [PMID: 39185223 PMCID: PMC11343141 DOI: 10.1101/2024.08.13.607780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/27/2024]
Abstract
Actin in neuronal processes is both stable and dynamic. The origin & functional roles of the different pools of actin is not well understood. We find that mutants that lack mitochondria, ric-7 and mtx-2; miro-1, in neuronal processes also lack dynamic actin. Mitochondria can regulate actin dynamics upto a distance ~80 μm along the neuronal process. Absence of axonal mitochondria and dynamic actin does not markedly alter the Spectrin Membrane Periodic Skeleton (MPS) in touch receptor neurons (TRNs). Restoring mitochondria inTRNs cell autonomously restores dynamic actin in a sod-2 dependent manner. We find that dynamic actin is necessary and sufficient for the localization of gap junction proteins in the TRNs and for the C. elegans gentle touch response. We identify an in vivo mechanism by which axonal mitochondria locally facilitate actin dynamics through reactive oxygen species that we show is necessary for electrical synapses & behaviour.
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Affiliation(s)
- Sneha Hegde
- Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai-400005, India
| | - Souvik Modi
- Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai-400005, India
| | - Ennis W. Deihl
- Colorado State University, Anatomy and Zoology W309, 1617 Campus Delivery, Fort Collins, 80523 Colorado
| | - Oliver Vinzenz Glomb
- Yale University, Boyer Center for Molecular Medicine, 295 Congress Ave, New Haven, CT 06510
- Current address: Institute of Clinical Anatomy and Cell Analysis, University of Tübingen, 72074 Tübingen, Germany
| | - Shaul Yogev
- Yale University, Boyer Center for Molecular Medicine, 295 Congress Ave, New Haven, CT 06510
| | - Frederic J. Hoerndli
- Colorado State University, Anatomy and Zoology W309, 1617 Campus Delivery, Fort Collins, 80523 Colorado
| | - Sandhya P. Koushika
- Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai-400005, India
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2
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Rentsch J, Bandstra S, Sezen B, Sigrist P, Bottanelli F, Schmerl B, Shoichet S, Noé F, Sadeghi M, Ewers H. Sub-membrane actin rings compartmentalize the plasma membrane. J Cell Biol 2024; 223:e202310138. [PMID: 38252080 PMCID: PMC10807028 DOI: 10.1083/jcb.202310138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/20/2023] [Accepted: 01/04/2024] [Indexed: 01/23/2024] Open
Abstract
The compartmentalization of the plasma membrane (PM) is a fundamental feature of cells. The diffusivity of membrane proteins is significantly lower in biological than in artificial membranes. This is likely due to actin filaments, but assays to prove a direct dependence remain elusive. We recently showed that periodic actin rings in the neuronal axon initial segment (AIS) confine membrane protein motion between them. Still, the local enrichment of ion channels offers an alternative explanation. Here we show, using computational modeling, that in contrast to actin rings, ion channels in the AIS cannot mediate confinement. Furthermore, we show, employing a combinatorial approach of single particle tracking and super-resolution microscopy, that actin rings are close to the PM and that they confine membrane proteins in several neuronal cell types. Finally, we show that actin disruption leads to loss of compartmentalization. Taken together, we here develop a system for the investigation of membrane compartmentalization and show that actin rings compartmentalize the PM.
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Affiliation(s)
- Jakob Rentsch
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Selle Bandstra
- Department of Mathematics and Computer Science, Freie Universität Berlin, Berlin, Germany
| | - Batuhan Sezen
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Philipp Sigrist
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Francesca Bottanelli
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Bettina Schmerl
- Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | - Frank Noé
- Department of Mathematics and Computer Science, Freie Universität Berlin, Berlin, Germany
| | - Mohsen Sadeghi
- Department of Mathematics and Computer Science, Freie Universität Berlin, Berlin, Germany
| | - Helge Ewers
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
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3
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Zehrer AC, Martin-Villalba A, Diederich B, Ewers H. An open-source, high-resolution, automated fluorescence microscope. eLife 2024; 12:RP89826. [PMID: 38436658 PMCID: PMC10942636 DOI: 10.7554/elife.89826] [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] [Indexed: 03/05/2024] Open
Abstract
Fluorescence microscopy is a fundamental tool in the life sciences, but the availability of sophisticated equipment required to yield high-quality, quantitative data is a major bottleneck in data production in many laboratories worldwide. This problem has long been recognized and the abundancy of low-cost electronics and the simplification of fabrication through 3D-printing have led to the emergence of open-source scientific hardware as a research field. Cost effective fluorescence microscopes can be assembled from cheaply mass-produced components, but lag behind commercial solutions in image quality. On the other hand, blueprints of sophisticated microscopes such as light-sheet or super-resolution systems, custom-assembled from high quality parts, are available, but require a high level of expertise from the user. Here, we combine the UC2 microscopy toolbox with high-quality components and integrated electronics and software to assemble an automated high-resolution fluorescence microscope. Using this microscope, we demonstrate high resolution fluorescence imaging for fixed and live samples. When operated inside an incubator, long-term live-cell imaging over several days was possible. Our microscope reaches single molecule sensitivity, and we performed single particle tracking and SMLM super-resolution microscopy experiments in cells. Our setup costs a fraction of its commercially available counterparts but still provides a maximum of capabilities and image quality. We thus provide a proof of concept that high quality scientific data can be generated by lay users with a low-budget system and open-source software. Our system can be used for routine imaging in laboratories that do not have the means to acquire commercial systems and through its affordability can serve as teaching material to students.
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Affiliation(s)
| | - Ana Martin-Villalba
- Department of Molecular Neurobiology, German Cancer Research CenteHeidelbergGermany
| | | | - Helge Ewers
- Institut für Chemie und Biochemie, Freie Universität BerlinBerlinGermany
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4
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Donia DT, Carbone M. Seed Priming with Zinc Oxide Nanoparticles to Enhance Crop Tolerance to Environmental Stresses. Int J Mol Sci 2023; 24:17612. [PMID: 38139445 PMCID: PMC10744145 DOI: 10.3390/ijms242417612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/06/2023] [Accepted: 12/13/2023] [Indexed: 12/24/2023] Open
Abstract
Drastic climate changes over the years have triggered environmental challenges for wild plants and crops due to fluctuating weather patterns worldwide. This has caused different types of stressors, responsible for a decrease in plant life and biological productivity, with consequent food shortages, especially in areas under threat of desertification. Nanotechnology-based approaches have great potential in mitigating environmental stressors, thus fostering a sustainable agriculture. Zinc oxide nanoparticles (ZnO NPs) have demonstrated to be biostimulants as well as remedies to both environmental and biotic stresses. Their administration in the early sowing stages, i.e., seed priming, proved to be effective in improving germination rate, seedling and plant growth and in ameliorating the indicators of plants' well-being. Seed nano-priming acts through several mechanisms such as enhanced nutrients uptake, improved antioxidant properties, ROS accumulation and lipid peroxidation. The target for seed priming by ZnO NPs is mostly crops of large consumption or staple food, in order to meet the increased needs of a growing population and the net drop of global crop frequency, due to climate changes and soil contaminations. The current review focuses on the most recent low-cost, low-sized ZnO NPs employed for seed nano-priming, to alleviate abiotic and biotic stresses, mitigate the negative effects of improper storage and biostimulate plants' growth and well-being. Taking into account that there is large variability among ZnO NPs and that their chemico-physical properties may play a role in determining the efficacy of nano-priming, for all examined cases, it is reported whether the ZnO NPs are commercial or lab prepared. In the latter cases, the preparation conditions are described, along with structural and morphological characterizations. Under these premises, future perspectives and challenges are discussed in relation to structural properties and the possibility of ZnO NPs engineering.
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Affiliation(s)
| | - Marilena Carbone
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, 00133 Roma, Italy;
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5
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Dasgupta A, Ngo HT, Tschoerner D, Touret N, da Rocha-Azevedo B, Jaqaman K. Multiscale imaging and quantitative analysis of plasma membrane protein-cortical actin interplay. Biophys J 2023; 122:3798-3815. [PMID: 37571825 PMCID: PMC10541498 DOI: 10.1016/j.bpj.2023.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 05/19/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023] Open
Abstract
The spatiotemporal organization of cell surface receptors is important for cell signaling. Cortical actin (CA), the subset of the actin cytoskeleton subjacent to the plasma membrane (PM), plays a large role in cell surface receptor organization. However, this has been shown largely through actin perturbation experiments, which raise concerns of nonspecific effects and preclude quantification of actin architecture and dynamics under unperturbed conditions. These limitations make it challenging to predict how changes in CA properties can affect receptor organization. To derive direct relationships between the architecture and dynamics of CA and the spatiotemporal organization of PM proteins, including cell surface receptors, we developed a multiscale imaging and computational analysis framework based on the integration of single-molecule imaging (SMI) of PM proteins and fluorescent speckle microscopy (FSM) of CA (combined: SMI-FSM) in the same live cell. SMI-FSM revealed differential relationships between PM proteins and CA based on the PM proteins' actin binding ability, diffusion type, and local CA density. Combining SMI-FSM with subcellular region analysis revealed differences in CA dynamics that were predictive of differences in PM protein mobility near ruffly cell edges versus closer to the cell center. SMI-FSM also highlighted the complexity of cell-wide actin perturbation, where we found that global changes in actin properties caused by perturbation were not necessarily reflected in the CA properties near PM proteins, and that the changes in PM protein properties upon perturbation varied based on the local CA environment. Given the widespread use of SMI as a method to study the spatiotemporal organization of PM proteins and the versatility of SMI-FSM, we expect it to be widely applicable to enable future investigation of the influence of CA architecture and dynamics on different PM proteins, especially in the context of actin-dependent cellular processes.
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Affiliation(s)
- Aparajita Dasgupta
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Huong-Tra Ngo
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Deryl Tschoerner
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Nicolas Touret
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Bruno da Rocha-Azevedo
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Khuloud Jaqaman
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas; Lyda Hill Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, Texas.
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6
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Delille F, Balloul E, Hajj B, Hanafi M, Morand C, Xu XZ, Dumas S, Coulon A, Lequeux N, Pons T. Sulfobetaine-Phosphonate Block Copolymer Coated Iron Oxide Nanoparticles for Genomic Locus Targeting and Magnetic Micromanipulation in the Nucleus of Living Cells. NANO LETTERS 2023. [PMID: 37390368 DOI: 10.1021/acs.nanolett.3c00688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2023]
Abstract
Exerting forces on biomolecules inside living cells would allow us to probe their dynamic interactions in their native environment. Magnetic iron oxide nanoparticles represent a unique tool capable of pulling on biomolecules with the application of an external magnetic field gradient; however, their use has been restricted to biomolecules accessible from the extracellular medium. Targeting intracellular biomolecules represents an additional challenge due to potential nonspecific interactions with cytoplasmic or nuclear components. We present the synthesis of sulfobetaine-phosphonate block copolymer ligands, which provide magnetic nanoparticles that are stealthy and targetable in living cells. We demonstrate, for the first time, their efficient targeting in the nucleus and their use for magnetic micromanipulation of a specific genomic locus in living cells. We believe that these stable and sensitive magnetic nanoprobes represent a promising tool to manipulate specific biomolecules in living cells and probe the mechanical properties of living matter at the molecular scale.
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Affiliation(s)
- Fanny Delille
- Laboratoire Physique et Etude des Matériaux, ESPCI-Paris, PSL Research University, CNRS, Sorbonne Université, UMR 8213, 10, rue Vauquelin, 75005 Paris, France
| | - Elie Balloul
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, Sorbonne Université, CNRS UMR168, 75005 Paris, France
| | - Bassam Hajj
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, Sorbonne Université, CNRS UMR168, 75005 Paris, France
| | - Mohamed Hanafi
- Sciences et Ingénierie de la Matière Molle, UMR 7615, ESPCI Paris PSL-CNRS-Sorbonne Université, 10 Rue Vauquelin, 75005 Paris, France
| | - Colin Morand
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, Sorbonne Université, CNRS UMR168, 75005 Paris, France
- Laboratoire Dynamique du Noyau, Institut Curie, PSL Research University, Sorbonne Université, CNRS UMR3664, 75005 Paris, France
| | - Xiang Zhen Xu
- Laboratoire Physique et Etude des Matériaux, ESPCI-Paris, PSL Research University, CNRS, Sorbonne Université, UMR 8213, 10, rue Vauquelin, 75005 Paris, France
| | - Simon Dumas
- Institut Pierre-Gilles de Gennes, Institut Curie, Sorbonne Université, PSL Research University, 6 rue Jean Calvin, 75005 Paris, France
| | - Antoine Coulon
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, Sorbonne Université, CNRS UMR168, 75005 Paris, France
- Laboratoire Dynamique du Noyau, Institut Curie, PSL Research University, Sorbonne Université, CNRS UMR3664, 75005 Paris, France
| | - Nicolas Lequeux
- Laboratoire Physique et Etude des Matériaux, ESPCI-Paris, PSL Research University, CNRS, Sorbonne Université, UMR 8213, 10, rue Vauquelin, 75005 Paris, France
| | - Thomas Pons
- Laboratoire Physique et Etude des Matériaux, ESPCI-Paris, PSL Research University, CNRS, Sorbonne Université, UMR 8213, 10, rue Vauquelin, 75005 Paris, France
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7
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Mao M, Lin Z, Chen L, Zou Z, Zhang J, Dou Q, Wu J, Chen J, Wu M, Niu L, Fan C, Zhang Y. Modular DNA-Origami-Based Nanoarrays Enhance Cell Binding Affinity through the "Lock-and-Key" Interaction. J Am Chem Soc 2023; 145:5447-5455. [PMID: 36812464 DOI: 10.1021/jacs.2c13825] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Surface proteins of cells are generally recognized through receptor-ligand interactions (RLIs) in disease diagnosis, but their nonuniform spatial distribution and higher-order structure lead to low binding affinity. Constructing nanotopologies that match the spatial distribution of membrane proteins to improve the binding affinity remains a challenge. Inspired by the multiantigen recognition of immune synapses, we developed modular DNA-origami-based nanoarrays with multivalent aptamers. By adjusting the valency and interspacing of the aptamers, we constructed specific nanotopology to match the spatial distribution of target protein clusters and avoid potential steric hindrance. We found that the nanoarrays significantly enhanced the binding affinity of target cells and synergistically recognized low-affinity antigen-specific cells. In addition, DNA nanoarrays used for the clinical detection of circulating tumor cells successfully verified their precise recognition ability and high-affinity RLIs. Such nanoarrays will further promote the potential application of DNA materials in clinical detection and even cell membrane engineering.
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Affiliation(s)
- Miao Mao
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong 510006, China
| | - Zhun Lin
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong 510006, China
| | - Liang Chen
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong 510006, China
| | - Zhengyu Zou
- Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong 510080, China
| | - Jie Zhang
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong 510006, China
| | - Quanhao Dou
- Joint Laboratory of Optofluidic Technology and Systems, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Jiacheng Wu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong 510006, China
| | - Jinglin Chen
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong 510006, China
| | - Minhao Wu
- Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong 510080, China
| | - Li Niu
- Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong 510006, China
| | - Chunhai Fan
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yuanqing Zhang
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong 510006, China
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8
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Dasgupta A, Ngo HT, Tschoerner D, Touret N, da Rocha-Azevedo B, Jaqaman K. Multiscale imaging and quantitative analysis of plasma membrane protein-cortical actin interplay. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.22.525112. [PMID: 36747866 PMCID: PMC9900770 DOI: 10.1101/2023.01.22.525112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The spatiotemporal organization of cell surface receptors is important for cell signaling. Cortical actin (CA), the subset of the actin cytoskeleton subjacent to the plasma membrane (PM), plays a large role in cell surface receptor organization. This was however shown largely through actin perturbation experiments, which raise concerns of nonspecific effects and preclude quantification of actin architecture and dynamics under unperturbed conditions. These limitations make it challenging to predict how changes in CA properties can affect receptor organization. To derive direct relationships between the architecture and dynamics of CA and the spatiotemporal organization of PM proteins, including cell surface receptors, we developed a multiscale imaging and computational analysis framework based on the integration of single-molecule imaging (SMI) of PM proteins and fluorescent speckle microscopy (FSM) of CA (combined: SMI-FSM) in the same live cell. SMI-FSM revealed differential relationships between PM proteins and CA based on the PM proteins’ actin binding ability, diffusion type and local CA density. It also highlighted the complexity of cell wide actin perturbation, where we found that global changes in actin properties caused by perturbation were not necessarily reflected in the CA properties near PM proteins, and the changes in PM protein properties upon perturbation varied based on the local CA environment. Given the widespread use of SMI as a method to study the spatiotemporal organization of PM proteins and the versatility of SMI-FSM, we expect it to be widely applicable to enable future investigation of the influence of CA architecture and dynamics on different PM proteins, especially in the context of actin-dependent cellular processes, such as cell migration. Significance Plasma membrane protein organization, an important factor for shaping cellular behaviors, is influenced by cortical actin, the subset of the actin cytoskeleton near the plasma membrane. Yet it is challenging to directly and quantitatively probe this influence. Here, we developed an imaging and analysis approach that combines single-molecule imaging, fluorescent speckle microscopy and computational statistical analysis to characterize and correlate the spatiotemporal organization of plasma membrane proteins and cortical actin. Our approach revealed different relationships between different proteins and cortical actin, and highlighted the complexity of interpreting cell wide actin perturbation experiments. We expect this approach to be widely used to study the influence of cortical actin on different plasma membrane components, especially in actin-dependent processes.
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Affiliation(s)
- Aparajita Dasgupta
- Department of Biophysics, University of Texas Southwestern Medical Center; Dallas, TX, USA
| | - Huong-Tra Ngo
- Department of Biophysics, University of Texas Southwestern Medical Center; Dallas, TX, USA
| | - Deryl Tschoerner
- Department of Biophysics, University of Texas Southwestern Medical Center; Dallas, TX, USA
| | - Nicolas Touret
- Department of Biochemistry, University of Alberta; Edmonton, AB, Canada
| | - Bruno da Rocha-Azevedo
- Department of Biophysics, University of Texas Southwestern Medical Center; Dallas, TX, USA
| | - Khuloud Jaqaman
- Department of Biophysics, University of Texas Southwestern Medical Center; Dallas, TX, USA
- Lyda Hill Department of Bioinformatics, University of Texas Southwestern Medical Center; Dallas, TX, USA
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9
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Nile SH, Thiruvengadam M, Wang Y, Samynathan R, Shariati MA, Rebezov M, Nile A, Sun M, Venkidasamy B, Xiao J, Kai G. Nano-priming as emerging seed priming technology for sustainable agriculture-recent developments and future perspectives. J Nanobiotechnology 2022; 20:254. [PMID: 35659295 PMCID: PMC9164476 DOI: 10.1186/s12951-022-01423-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 04/17/2022] [Indexed: 12/04/2022] Open
Abstract
Nano-priming is an innovative seed priming technology that helps to improve seed germination, seed growth, and yield by providing resistance to various stresses in plants. Nano-priming is a considerably more effective method compared to all other seed priming methods. The salient features of nanoparticles (NPs) in seed priming are to develop electron exchange and enhanced surface reaction capabilities associated with various components of plant cells and tissues. Nano-priming induces the formation of nanopores in shoot and helps in the uptake of water absorption, activates reactive oxygen species (ROS)/antioxidant mechanisms in seeds, and forms hydroxyl radicals to loosen the walls of the cells and acts as an inducer for rapid hydrolysis of starch. It also induces the expression of aquaporin genes that are involved in the intake of water and also mediates H2O2, or ROS, dispersed over biological membranes. Nano-priming induces starch degradation via the stimulation of amylase, which results in the stimulation of seed germination. Nano-priming induces a mild ROS that acts as a primary signaling cue for various signaling cascade events that participate in secondary metabolite production and stress tolerance. This review provides details on the possible mechanisms by which nano-priming induces breaking seed dormancy, promotion of seed germination, and their impact on primary and secondary metabolite production. In addition, the use of nano-based fertilizer and pesticides as effective materials in nano-priming and plant growth development were also discussed, considering their recent status and future perspectives.
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Affiliation(s)
- Shivraj Hariram Nile
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, The Third Affiliated Hospital, School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, People's Republic of China
| | - Muthu Thiruvengadam
- Department of Crop Science, College of Sanghuh Life Science, Konkuk University, Seoul, 05029, Republic of Korea
| | - Yao Wang
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, The Third Affiliated Hospital, School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, People's Republic of China
- Institute of Plant Biotechnology, School of Life Sciences, Shanghai Normal University, Shanghai, 200234, People's Republic of China
| | - Ramkumar Samynathan
- R&D Division, Alchem Diagnostics, No. 1/1, Gokhale Street, Ram Nagar, Coimbatore, 641009, Tamil Nadu, India
| | - Mohammad Ali Shariati
- Scientific Department, K.G. Razumovsky Moscow State University of Technologies and Management (The First Cossack University), 73, Zemlyanoy Val St., Moscow, 109004, Russian Federation
| | - Maksim Rebezov
- Department of Scientific Research, V. M. Gorbatov Federal Research Center for Food Systems, 26 Talalikhina St., Moscow, 109316, Russian Federation
| | - Arti Nile
- Department of Crop Science, College of Sanghuh Life Science, Konkuk University, Seoul, 05029, Republic of Korea
| | - Meihong Sun
- Institute of Plant Biotechnology, School of Life Sciences, Shanghai Normal University, Shanghai, 200234, People's Republic of China
| | - Baskar Venkidasamy
- Department of Biotechnology, Sri Shakthi Institute of Engineering and Technology, Coimbatore, 641062, Tamil Nadu, India.
| | - Jianbo Xiao
- Department of Analytical Chemistry and Food Science, Faculty of Food Science and Technology, University of Vigo, Vigo, Spain.
| | - Guoyin Kai
- Laboratory for Core Technology of TCM Quality Improvement and Transformation, The Third Affiliated Hospital, School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, People's Republic of China.
- Laboratory of Medicinal Plant Biotechnology, College of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, People's Republic of China.
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10
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Kwizera EA, Stewart S, Mahmud MM, He X. Magnetic Nanoparticle-Mediated Heating for Biomedical Applications. JOURNAL OF HEAT TRANSFER 2022; 144:030801. [PMID: 35125512 PMCID: PMC8813031 DOI: 10.1115/1.4053007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/03/2021] [Indexed: 05/17/2023]
Abstract
Magnetic nanoparticles, especially superparamagnetic nanoparticles (SPIONs), have attracted tremendous attention for various biomedical applications. Facile synthesis and functionalization together with easy control of the size and shape of SPIONS to customize their unique properties, have made it possible to develop different types of SPIONs tailored for diverse functions/applications. More recently, considerable attention has been paid to the thermal effect of SPIONs for the treatment of diseases like cancer and for nanowarming of cryopreserved/banked cells, tissues, and organs. In this mini-review, recent advances on the magnetic heating effect of SPIONs for magnetothermal therapy and enhancement of cryopreservation of cells, tissues, and organs, are discussed, together with the non-magnetic heating effect (i.e., high Intensity focused ultrasound or HIFU-activated heating) of SPIONs for cancer therapy. Furthermore, challenges facing the use of magnetic nanoparticles in these biomedical applications are presented.
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Affiliation(s)
- Elyahb Allie Kwizera
- Fischell Department of Bioengineering, University of Maryland, 8278 Paint Branch Drive, College Park, MD 20742
| | - Samantha Stewart
- Fischell Department of Bioengineering, University of Maryland, 8278 Paint Branch Drive, College Park, MD 20742
| | - Md Musavvir Mahmud
- Fischell Department of Bioengineering, University of Maryland, 8278 Paint Branch Drive, College Park, MD 20742
| | - Xiaoming He
- Fischell Department of Bioengineering, University of Maryland, 8278 Paint Branch Drive, College Park, MD 20742; Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland, Baltimore, MD 21201
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11
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Simple methods for quantifying super-resolved cortical actin. Sci Rep 2022; 12:2715. [PMID: 35177729 PMCID: PMC8854627 DOI: 10.1038/s41598-022-06702-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 02/04/2022] [Indexed: 11/09/2022] Open
Abstract
Cortical actin plays a key role in cell movement and division, but has also been implicated in the organisation of cell surface receptors such as G protein-coupled receptors. The actin mesh proximal to the inner membrane forms small fenced regions, or 'corrals', in which receptors can be constrained. Quantification of the actin mesh at the nanoscale has largely been attempted in single molecule datasets and electron micrographs. This work describes the development and validation of workflows for analysis of super resolved fixed cortical actin images obtained by Super Resolved Radial Fluctuations (SRRF), Structured Illumination Microscopy (3D-SIM) and Expansion Microscopy (ExM). SRRF analysis was used to show a significant increase in corral area when treating cells with the actin disrupting agent cytochalasin D (increase of 0.31 µm2 ± 0.04 SEM), and ExM analysis allowed for the quantitation of actin filament densities. Thus, this work allows complex actin networks to be quantified from super-resolved images and is amenable to both fixed and live cell imaging.
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Sun W, Gao X, Lei H, Wang W, Cao Y. Biophysical Approaches for Applying and Measuring Biological Forces. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105254. [PMID: 34923777 PMCID: PMC8844594 DOI: 10.1002/advs.202105254] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Indexed: 05/13/2023]
Abstract
Over the past decades, increasing evidence has indicated that mechanical loads can regulate the morphogenesis, proliferation, migration, and apoptosis of living cells. Investigations of how cells sense mechanical stimuli or the mechanotransduction mechanism is an active field of biomaterials and biophysics. Gaining a further understanding of mechanical regulation and depicting the mechanotransduction network inside cells require advanced experimental techniques and new theories. In this review, the fundamental principles of various experimental approaches that have been developed to characterize various types and magnitudes of forces experienced at the cellular and subcellular levels are summarized. The broad applications of these techniques are introduced with an emphasis on the difficulties in implementing these techniques in special biological systems. The advantages and disadvantages of each technique are discussed, which can guide readers to choose the most suitable technique for their questions. A perspective on future directions in this field is also provided. It is anticipated that technical advancement can be a driving force for the development of mechanobiology.
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Affiliation(s)
- Wenxu Sun
- School of SciencesNantong UniversityNantong226019P. R. China
| | - Xiang Gao
- Key Laboratory of Intelligent Optical Sensing and IntegrationNational Laboratory of Solid State Microstructureand Department of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210023P. R. China
- Institute of Brain ScienceNanjing UniversityNanjing210023P. R. China
| | - Hai Lei
- Key Laboratory of Intelligent Optical Sensing and IntegrationNational Laboratory of Solid State Microstructureand Department of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210023P. R. China
- Institute of Brain ScienceNanjing UniversityNanjing210023P. R. China
- Chemistry and Biomedicine Innovation CenterNanjing UniversityNanjing210023P. R. China
| | - Wei Wang
- Key Laboratory of Intelligent Optical Sensing and IntegrationNational Laboratory of Solid State Microstructureand Department of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210023P. R. China
- Institute of Brain ScienceNanjing UniversityNanjing210023P. R. China
| | - Yi Cao
- Key Laboratory of Intelligent Optical Sensing and IntegrationNational Laboratory of Solid State Microstructureand Department of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210023P. R. China
- Institute of Brain ScienceNanjing UniversityNanjing210023P. R. China
- MOE Key Laboratory of High Performance Polymer Materials and TechnologyDepartment of Polymer Science & EngineeringCollege of Chemistry & Chemical EngineeringNanjing UniversityNanjing210023P. R. China
- Chemistry and Biomedicine Innovation CenterNanjing UniversityNanjing210023P. R. China
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Lin Z, Zhou J, Qu Y, Pan S, Han Y, Lafleur RPM, Chen J, Cortez-Jugo C, Richardson JJ, Caruso F. Luminescent Metal-Phenolic Networks for Multicolor Particle Labeling. Angew Chem Int Ed Engl 2021; 60:24968-24975. [PMID: 34528750 DOI: 10.1002/anie.202108671] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/24/2021] [Indexed: 12/22/2022]
Abstract
The development of fluorescence labeling techniques has attracted widespread interest in various fields, including biomedical science as it can facilitate high-resolution imaging and the spatiotemporal understanding of various biological processes. We report a supramolecular fluorescence labeling strategy using luminescent metal-phenolic networks (MPNs) constructed from metal ions, phenolic ligands, and common and commercially available dyes. The rapid labeling process (<5 min) produces ultrathin coatings (≈10 nm) on diverse particles (e.g., organic, inorganic, and biological entities) with customized luminescence (e.g., red, blue, multichromatic, and white light) simply through the selection of fluorophores. The fluorescent coatings are stable at pH values from 1 to 8 and in complex biological media owing to the dominant π interactions between the dyes and MPNs. These coatings exhibit negligible cytotoxicity and their strong fluorescence is retained even when internalized into intracellular compartments. This strategy is expected to provide a versatile approach for fluorescence labeling with potential in diverse fields across the physical and life sciences.
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Affiliation(s)
- Zhixing Lin
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Jiajing Zhou
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Yijiao Qu
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Shuaijun Pan
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Yiyuan Han
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - René P M Lafleur
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Jingqu Chen
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Christina Cortez-Jugo
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Joseph J Richardson
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
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Lin Z, Zhou J, Qu Y, Pan S, Han Y, Lafleur RPM, Chen J, Cortez‐Jugo C, Richardson JJ, Caruso F. Luminescent Metal‐Phenolic Networks for Multicolor Particle Labeling. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108671] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Zhixing Lin
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Jiajing Zhou
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Yijiao Qu
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Shuaijun Pan
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Yiyuan Han
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - René P. M. Lafleur
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Jingqu Chen
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Christina Cortez‐Jugo
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Joseph J. Richardson
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
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Kutz S, Zehrer AC, Svetlitckii R, Gülcüler Balta GS, Galli L, Kleber S, Rentsch J, Martin-Villalba A, Ewers H. An Efficient GUI-Based Clustering Software for Simulation and Bayesian Cluster Analysis of Single-Molecule Localization Microscopy Data. FRONTIERS IN BIOINFORMATICS 2021; 1:723915. [PMID: 36303736 PMCID: PMC9581037 DOI: 10.3389/fbinf.2021.723915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 09/17/2021] [Indexed: 11/13/2022] Open
Abstract
Ligand binding of membrane proteins triggers many important cellular signaling events by the lateral aggregation of ligand-bound and other membrane proteins in the plane of the plasma membrane. This local clustering can lead to the co-enrichment of molecules that create an intracellular signal or bring sufficient amounts of activity together to shift an existing equilibrium towards the execution of a signaling event. In this way, clustering can serve as a cellular switch. The underlying uneven distribution and local enrichment of the signaling cluster’s constituting membrane proteins can be used as a functional readout. This information is obtained by combining single-molecule fluorescence microscopy with cluster algorithms that can reliably and reproducibly distinguish clusters from fluctuations in the background noise to generate quantitative data on this complex process. Cluster analysis of single-molecule fluorescence microscopy data has emerged as a proliferative field, and several algorithms and software solutions have been put forward. However, in most cases, such cluster algorithms require multiple analysis parameters to be defined by the user, which may lead to biased results. Furthermore, most cluster algorithms neglect the individual localization precision connected to every localized molecule, leading to imprecise results. Bayesian cluster analysis has been put forward to overcome these problems, but so far, it has entailed high computational cost, increasing runtime drastically. Finally, most software is challenging to use as they require advanced technical knowledge to operate. Here we combined three advanced cluster algorithms with the Bayesian approach and parallelization in a user-friendly GUI and achieved up to an order of magnitude faster processing than for previous approaches. Our work will simplify access to a well-controlled analysis of clustering data generated by SMLM and significantly accelerate data processing. The inclusion of a simulation mode aids in the design of well-controlled experimental assays.
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Affiliation(s)
- Saskia Kutz
- Institut für Biochemie, Freie Universität Berlin, Berlin, Germany
| | - Ando C. Zehrer
- Institut für Biochemie, Freie Universität Berlin, Berlin, Germany
| | | | - Gülce S. Gülcüler Balta
- Department of Molecular Neurobiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Lucrezia Galli
- Department of Molecular Neurobiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Susanne Kleber
- Department of Molecular Neurobiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jakob Rentsch
- Institut für Biochemie, Freie Universität Berlin, Berlin, Germany
| | - Ana Martin-Villalba
- Department of Molecular Neurobiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Helge Ewers
- Institut für Biochemie, Freie Universität Berlin, Berlin, Germany
- *Correspondence: Helge Ewers,
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Magnetic Nanoprobes for Spatio-Mechanical Manipulation in Single Cells. NANOMATERIALS 2021; 11:nano11092267. [PMID: 34578584 PMCID: PMC8471295 DOI: 10.3390/nano11092267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/25/2021] [Accepted: 08/27/2021] [Indexed: 02/08/2023]
Abstract
Magnetic nanoparticles (MNPs) are widely known as valuable agents for biomedical applications. Recently, MNPs were further suggested to be used for a remote and non-invasive manipulation, where their spatial redistribution or force response in a magnetic field provides a fine-tunable stimulus to a cell. Here, we investigated the properties of two different MNPs and assessed their suitability for spatio-mechanical manipulations: semisynthetic magnetoferritin nanoparticles and fully synthetic 'nanoflower'-shaped iron oxide nanoparticles. As well as confirming their monodispersity in terms of structure, surface potential, and magnetic response, we monitored the MNP performance in a living cell environment using fluorescence microscopy and asserted their biocompatibility. We then demonstrated facilitated spatial redistribution of magnetoferritin compared to 'nanoflower'-NPs after microinjection, and a higher magnetic force response of these NPs compared to magnetoferritin inside a cell. Our remote manipulation assays present these tailored magnetic materials as suitable agents for applications in magnetogenetics, biomedicine, or nanomaterial research.
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Abstract
Pattern formation processes in active systems give rise to a plethora of collective structures. Predicting how the emergent structures depend on the microscopic interactions between the moving agents remains a challenge. By introducing a high-density actin gliding assay on a fluid membrane, we demonstrate the emergence of polar structures in a regime of nematic binary interactions dominated by steric repulsion. The transition from a microscopic nematic symmetry to a macroscopic polar structure is linked to microscopic polarity sorting mechanisms, including accumulation in wedge-like topological defects. Our results should be instrumental for a better understanding of pattern formation and polarity sorting processes in active matter. Collective motion of active matter is ubiquitously observed, ranging from propelled colloids to flocks of bird, and often features the formation of complex structures composed of agents moving coherently. However, it remains extremely challenging to predict emergent patterns from the binary interaction between agents, especially as only a limited number of interaction regimes have been experimentally observed so far. Here, we introduce an actin gliding assay coupled to a supported lipid bilayer, whose fluidity forces the interaction between self-propelled filaments to be dominated by steric repulsion. This results in filaments stopping upon binary collisions and eventually aligning nematically. Such a binary interaction rule results at high densities in the emergence of dynamic collectively moving structures including clusters, vortices, and streams of filaments. Despite the microscopic interaction having a nematic symmetry, the emergent structures are found to be polar, with filaments collectively moving in the same direction. This is due to polar biases introduced by the stopping upon collision, both on the individual filaments scale as well as on the scale of collective structures. In this context, positive half-charged topological defects turn out to be a most efficient trapping and polarity sorting conformation.
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Affiliation(s)
- Keke Hu
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 41296 Gothenburg, Sweden
| | - Tho D. K. Nguyen
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 41296 Gothenburg, Sweden
| | - Stefania Rabasco
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 41296 Gothenburg, Sweden
| | - Pieter E. Oomen
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 41296 Gothenburg, Sweden
- ParaMedir B.V., 1e Energieweg 13, 9301 LK Roden, The Netherlands
| | - Andrew G. Ewing
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 41296 Gothenburg, Sweden
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