1
|
Zens B, Fäßler F, Hansen JM, Hauschild R, Datler J, Hodirnau VV, Zheden V, Alanko J, Sixt M, Schur FK. Lift-out cryo-FIBSEM and cryo-ET reveal the ultrastructural landscape of extracellular matrix. J Cell Biol 2024; 223:e202309125. [PMID: 38506714 PMCID: PMC10955043 DOI: 10.1083/jcb.202309125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 02/19/2024] [Accepted: 03/01/2024] [Indexed: 03/21/2024] Open
Abstract
The extracellular matrix (ECM) serves as a scaffold for cells and plays an essential role in regulating numerous cellular processes, including cell migration and proliferation. Due to limitations in specimen preparation for conventional room-temperature electron microscopy, we lack structural knowledge on how ECM components are secreted, remodeled, and interact with surrounding cells. We have developed a 3D-ECM platform compatible with sample thinning by cryo-focused ion beam milling, the lift-out extraction procedure, and cryo-electron tomography. Our workflow implements cell-derived matrices (CDMs) grown on EM grids, resulting in a versatile tool closely mimicking ECM environments. This allows us to visualize ECM for the first time in its hydrated, native context. Our data reveal an intricate network of extracellular fibers, their positioning relative to matrix-secreting cells, and previously unresolved structural entities. Our workflow and results add to the structural atlas of the ECM, providing novel insights into its secretion and assembly.
Collapse
Affiliation(s)
- Bettina Zens
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Florian Fäßler
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Jesse M. Hansen
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Robert Hauschild
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Julia Datler
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | | | - Vanessa Zheden
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Jonna Alanko
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Michael Sixt
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Florian K.M. Schur
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| |
Collapse
|
2
|
Sarkar A, Jana A, Agashe A, Wang J, Kapania R, Gov NS, DeLuca JG, Paul R, Nain AS. Confinement in fibrous environments positions and orients mitotic spindles. bioRxiv 2024:2024.04.12.589246. [PMID: 38659898 PMCID: PMC11042200 DOI: 10.1101/2024.04.12.589246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Accurate positioning of the mitotic spindle within the rounded cell body is critical to physiological maintenance. Adherent mitotic cells encounter confinement from neighboring cells or the extracellular matrix (ECM), which can cause rotation of mitotic spindles and, consequently, titling of the metaphase plate (MP). To understand the positioning and orientation of mitotic spindles under confinement by fibers (ECM-confinement), we use flexible ECM-mimicking nanofibers that allow natural rounding of the cell body while confining it to differing levels. Rounded mitotic bodies are anchored in place by actin retraction fibers (RFs) originating from adhesion clusters on the ECM-mimicking fibers. We discover the extent of ECM-confinement patterns RFs in 3D: triangular and band-like at low and high confinement, respectively. A stochastic Monte-Carlo simulation of the centrosome (CS), chromosome (CH), membrane interactions, and 3D arrangement of RFs on the mitotic body recovers MP tilting trends observed experimentally. Our mechanistic analysis reveals that the 3D shape of RFs is the primary driver of the MP rotation. Under high ECM-confinement, the fibers can mechanically pinch the cortex, causing the MP to have localized deformations at contact sites with fibers. Interestingly, high ECM-confinement leads to low and high MP tilts, which mechanistically depend upon the extent of cortical deformation, RF patterning, and MP position. We identify that cortical deformation and RFs work in tandem to limit MP tilt, while asymmetric positioning of MP leads to high tilts. Overall, we provide fundamental insights into how mitosis may proceed in fibrous ECM-confining microenvironments in vivo.
Collapse
Affiliation(s)
- Apurba Sarkar
- School of Mathematical and Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Aniket Jana
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061
| | - Atharva Agashe
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061
| | - Ji Wang
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA 24061
| | - Rakesh Kapania
- Department of Aerospace and Ocean Engineering, Virginia Tech, Blacksburg, VA
| | - Nir S. Gov
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Jennifer G. DeLuca
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523
| | - Raja Paul
- School of Mathematical and Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Amrinder S. Nain
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA 24061
| |
Collapse
|
3
|
Chandler T, Guo M, Su Y, Chen J, Wu Y, Liu J, Agashe A, Fischer RS, Mehta SB, Kumar A, Baskin TI, Jamouillé V, Liu H, Swaminathan V, Nain A, Oldenbourg R, Riviére PL, Shroff H. Three-dimensional spatio-angular fluorescence microscopy with a polarized dual-view inverted selective-plane illumination microscope (pol-diSPIM). bioRxiv 2024:2024.03.09.584243. [PMID: 38712306 PMCID: PMC11071302 DOI: 10.1101/2024.03.09.584243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Polarized fluorescence microscopy is a valuable tool for measuring molecular orientations, but techniques for recovering three-dimensional orientations and positions of fluorescent ensembles are limited. We report a polarized dual-view light-sheet system for determining the three-dimensional orientations and diffraction-limited positions of ensembles of fluorescent dipoles that label biological structures, and we share a set of visualization, histogram, and profiling tools for interpreting these positions and orientations. We model our samples, their excitation, and their detection using coarse-grained representations we call orientation distribution functions (ODFs). We apply ODFs to create physics-informed models of image formation with spatio-angular point-spread and transfer functions. We use theory and experiment to conclude that light-sheet tilting is a necessary part of our design for recovering all three-dimensional orientations. We use our system to extend known two-dimensional results to three dimensions in FM1-43-labelled giant unilamellar vesicles, fast-scarlet-labelled cellulose in xylem cells, and phalloidin-labelled actin in U2OS cells. Additionally, we observe phalloidin-labelled actin in mouse fibroblasts grown on grids of labelled nanowires and identify correlations between local actin alignment and global cell-scale orientation, indicating cellular coordination across length scales.
Collapse
Affiliation(s)
- Talon Chandler
- CZ Biohub SF, San Francisco, 94158, California, USA
- Department of Radiology, University of Chicago, Chicago, 60637, Illinois, USA
| | - Min Guo
- State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China
- Laboratory of High Resolution Optical Imaging, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, 20892, Maryland, USA
| | - Yijun Su
- Laboratory of High Resolution Optical Imaging, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, 20892, Maryland, USA
- Advanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, 20892, Maryland, USA
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, 20147, Virginia, USA
| | - Jiji Chen
- Advanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, 20892, Maryland, USA
| | - Yicong Wu
- Laboratory of High Resolution Optical Imaging, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, 20892, Maryland, USA
| | - Junyu Liu
- State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China
| | - Atharva Agashe
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, 24061, Virginia, USA
| | - Robert S. Fischer
- Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, 20892, Maryland, USA
| | - Shalin B. Mehta
- CZ Biohub SF, San Francisco, 94158, California, USA
- Department of Radiology, University of Chicago, Chicago, 60637, Illinois, USA
- Bell Center, Marine Biological Laboratory, Woods Hole, 02543, Massachusetts, USA
| | - Abhishek Kumar
- Bell Center, Marine Biological Laboratory, Woods Hole, 02543, Massachusetts, USA
| | - Tobias I. Baskin
- Biology Department, University of Massachusetts, Amherst, 01003, Maryland, USA
- Whitman Center, Marine Biological Laboratory, Woods Hole, 02543, Massachusetts, USA
| | - Valentin Jamouillé
- Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, 20892, Maryland, USA
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, V5A 1S6, British Columbia, Canada
| | - Huafeng Liu
- State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China
| | - Vinay Swaminathan
- Department of Clinical Sciences, Lund University, Lund, SE-221 00, Scania, Sweden
- Wallenberg Centre for Molecular Medicine, Lund University, Lund, SE-221 00, Scania, Sweden
| | - Amrinder Nain
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, 24061, Virginia, USA
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, 24061, Virginia, USA
| | - Rudolf Oldenbourg
- Bell Center, Marine Biological Laboratory, Woods Hole, 02543, Massachusetts, USA
| | - Patrick La Riviére
- Department of Radiology, University of Chicago, Chicago, 60637, Illinois, USA
- Whitman Center, Marine Biological Laboratory, Woods Hole, 02543, Massachusetts, USA
| | - Hari Shroff
- Laboratory of High Resolution Optical Imaging, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, 20892, Maryland, USA
- Advanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, 20892, Maryland, USA
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, 20147, Virginia, USA
- Whitman Center, Marine Biological Laboratory, Woods Hole, 02543, Massachusetts, USA
| |
Collapse
|
4
|
Nazari SS, Doyle AD, Bleck CKE, Yamada KM. Long Prehensile Protrusions Can Facilitate Cancer Cell Invasion through the Basement Membrane. Cells 2023; 12:2474. [PMID: 37887318 PMCID: PMC10605924 DOI: 10.3390/cells12202474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/28/2023] Open
Abstract
A basic process in cancer is the breaching of basement-membrane barriers to permit tissue invasion. Cancer cells can use proteases and physical mechanisms to produce initial holes in basement membranes, but how cells squeeze through this barrier into matrix environments is not well understood. We used a 3D invasion model consisting of cancer-cell spheroids encapsulated by a basement membrane and embedded in collagen to characterize the dynamic early steps in cancer-cell invasion across this barrier. We demonstrate that certain cancer cells extend exceptionally long (~30-100 μm) protrusions through basement membranes via actin and microtubule cytoskeletal function. These long protrusions use integrin adhesion and myosin II-based contractility to pull cells through the basement membrane for initial invasion. Concurrently, these long, organelle-rich protrusions pull surrounding collagen inward while propelling cancer cells outward through perforations in the basement-membrane barrier. These exceptionally long, contractile cellular protrusions can facilitate the breaching of the basement-membrane barrier as a first step in cancer metastasis.
Collapse
Affiliation(s)
- Shayan S. Nazari
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| | - Andrew D. Doyle
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| | - Christopher K. E. Bleck
- Electron Microscopy Core, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Kenneth M. Yamada
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| |
Collapse
|
5
|
Sadhu RK, Hernandez-Padilla C, Eisenbach YE, Penič S, Zhang L, Vishwasrao HD, Behkam B, Konstantopoulos K, Shroff H, Iglič A, Peles E, Nain AS, Gov NS. Experimental and theoretical model for the origin of coiling of cellular protrusions around fibers. Nat Commun 2023; 14:5612. [PMID: 37699891 PMCID: PMC10497540 DOI: 10.1038/s41467-023-41273-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 08/29/2023] [Indexed: 09/14/2023] Open
Abstract
Protrusions at the leading-edge of a cell play an important role in sensing the extracellular cues during cellular spreading and motility. Recent studies provided indications that these protrusions wrap (coil) around the extracellular fibers. However, the physics of this coiling process, and the mechanisms that drive it, are not well understood. We present a combined theoretical and experimental study of the coiling of cellular protrusions on fibers of different geometry. Our theoretical model describes membrane protrusions that are produced by curved membrane proteins that recruit the protrusive forces of actin polymerization, and identifies the role of bending and adhesion energies in orienting the leading-edges of the protrusions along the azimuthal (coiling) direction. Our model predicts that the cell's leading-edge coils on fibers with circular cross-section (above some critical radius), but the coiling ceases for flattened fibers of highly elliptical cross-section. These predictions are verified by 3D visualization and quantitation of coiling on suspended fibers using Dual-View light-sheet microscopy (diSPIM). Overall, we provide a theoretical framework, supported by experiments, which explains the physical origin of the coiling phenomenon.
Collapse
Affiliation(s)
- Raj Kumar Sadhu
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel.
- Institut Curie, PSL Research University, CNRS, UMR 168, Paris, France.
| | | | - Yael Eshed Eisenbach
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Samo Penič
- Laboratory of Physics, Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Slovenia
| | - Lixia Zhang
- Advanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, MD, USA
| | - Harshad D Vishwasrao
- Advanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, MD, USA
| | - Bahareh Behkam
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, 24061, USA
| | | | - Hari Shroff
- Advanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, MD, USA
- Laboratory of High Resolution Optical Imaging, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, USA
| | - Aleš Iglič
- Laboratory of Physics, Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Slovenia
| | - Elior Peles
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Amrinder S Nain
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, 24061, USA.
| | - Nir S Gov
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel.
| |
Collapse
|
6
|
Mukherjee A, Ron JE, Hu HT, Nishimura T, Hanawa‐Suetsugu K, Behkam B, Mimori‐Kiyosue Y, Gov NS, Suetsugu S, Nain AS. Actin Filaments Couple the Protrusive Tips to the Nucleus through the I-BAR Domain Protein IRSp53 during the Migration of Cells on 1D Fibers. Adv Sci (Weinh) 2023; 10:e2207368. [PMID: 36698307 PMCID: PMC9982589 DOI: 10.1002/advs.202207368] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Indexed: 05/31/2023]
Abstract
The cell migration cycle, well-established in 2D, proceeds with forming new protrusive structures at the cell membrane and subsequent redistribution of contractile machinery. Three-dimensional (3D) environments are complex and composed of 1D fibers, and 1D fibers are shown to recapitulate essential features of 3D migration. However, the establishment of protrusive activity at the cell membrane and contractility in 1D fibrous environments remains partially understood. Here the role of membrane curvature regulator IRSp53 is examined as a coupler between actin filaments and plasma membrane during cell migration on single, suspended 1D fibers. IRSp53 depletion reduced cell-length spanning actin stress fibers that originate from the cell periphery, protrusive activity, and contractility, leading to uncoupling of the nucleus from cellular movements. A theoretical model capable of predicting the observed transition of IRSp53-depleted cells from rapid stick-slip migration to smooth and slower migration due to reduced actin polymerization at the cell edges is developed, which is verified by direct measurements of retrograde actin flow using speckle microscopy. Overall, it is found that IRSp53 mediates actin recruitment at the cellular tips leading to the establishment of cell-length spanning fibers, thus demonstrating a unique role of IRSp53 in controlling cell migration in 3D.
Collapse
Affiliation(s)
- Apratim Mukherjee
- Department of Mechanical EngineeringVirginia TechBlacksburgVA24061USA
| | - Jonathan Emanuel Ron
- Department of Chemical and Biological PhysicsWeizmann Institute of ScienceRehovot7610001Israel
| | - Hooi Ting Hu
- Division of Biological ScienceGraduate School of Science and TechnologyNara Institute of Science and TechnologyIkoma630‐0192Japan
| | - Tamako Nishimura
- Division of Biological ScienceGraduate School of Science and TechnologyNara Institute of Science and TechnologyIkoma630‐0192Japan
| | | | - Bahareh Behkam
- Department of Mechanical EngineeringVirginia TechBlacksburgVA24061USA
| | - Yuko Mimori‐Kiyosue
- Laboratory for Molecular and Cellular DynamicsRIKEN Center for Biosystems Dynamics ResearchMinatojima‐minaminachiChuo‐kuKobeHyogo650‐0047Japan
| | - Nir Shachna Gov
- Department of Chemical and Biological PhysicsWeizmann Institute of ScienceRehovot7610001Israel
| | - Shiro Suetsugu
- Division of Biological ScienceGraduate School of Science and TechnologyNara Institute of Science and TechnologyIkoma630‐0192Japan
- Data Science CenterNara Institute of Science and TechnologyIkoma630‐0192Japan
- Center for Digital Green‐innovationNara Institute of Science and TechnologyIkoma630‐0192Japan
| | | |
Collapse
|
7
|
Plaut S. Suggesting a mechanism for acupuncture as a global percutaneous needle fasciotomy that respects tensegrity principles for treating fibromyalgia. Front Med (Lausanne) 2023; 9:952159. [PMID: 36777160 PMCID: PMC9911817 DOI: 10.3389/fmed.2022.952159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 12/30/2022] [Indexed: 01/28/2023] Open
Abstract
Acupuncture is a minimally invasive therapeutic method that uses small caliber needles while inserting them through the skin into various areas of the body. Some empirical studies find evidence to support the use of acupuncture as a treatment for certain medical conditions, however, this peculiar practice is widely considered as the domain of alternative and non-evidence-based medicine. Several mechanisms have been suggested in an attempt to explain the therapeutic action of acupuncture, but the way in which acupuncture alleviates chronic non-cancer pain or psychosomatic and psychiatric disorders is not fully understood. A recent study suggested a theoretical model (coined "Fascial Armoring") with a cellular pathway to help explain the pathogenesis of myofascial pain/fibromyalgia syndrome and functional psychosomatic syndromes. It proposes that these syndromes are a spectrum of a single medical entity that involves myofibroblasts with contractile activity in fascia and aberrant extracellular matrix (ECM) remodeling, which may lead to widespread mechanical tension and compression. This can help explain diverse psycho-somatic manifestations of fibromyalgia-like syndromes. Fascia is a continuous interconnected tissue network that extends throughout the body and has qualities of bio-tensegrity. Previous studies show that a mechanical action by needling induces soft tissue changes and lowers the shear modulus and stiffness in myofascial tissue. This hypothesis and theory paper offers a new mechanism for acupuncture therapy as a global percutaneous needle fasciotomy that respects tensegrity principles (tensegrity-based needling), in light of the theoretical model of "Fascial Armoring." The translation of this model to other medical conditions carries potential to advance therapies. These days opioid overuse and over-prescription are ubiquitous, as well as chronic pain and suffering.
Collapse
Affiliation(s)
- Shiloh Plaut
- *Correspondence: Shiloh Plaut, , ; orcid.org/0000-0001-5823-3390
| |
Collapse
|
8
|
Zhang Y, Zhang M, Xie Z, Ding Y, Huang J, Yao J, Lv Y, Zuo J. Research Progress and Direction of Novel Organelle-Migrasomes. Cancers (Basel) 2022; 15:cancers15010134. [PMID: 36612129 PMCID: PMC9817827 DOI: 10.3390/cancers15010134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/17/2022] [Accepted: 12/22/2022] [Indexed: 12/28/2022] Open
Abstract
Migrasomes are organelles that are similar in structure to pomegranates, up to 3 μm in diameter, and contain small vesicles with a diameter of 50-100 nm. These membranous organelles grow at the intersections or tips of retracting fibers at the back of migrating cells. The process by which cells release migrasomes and their contents outside the cell is called migracytosis. The signal molecules are packaged in the migrasomes and released to the designated location by migrasomes to activate the surrounding cells. Finally, the migrasomes complete the entire process of information transmission. In this sense, migrasomes integrate time, space, and specific chemical information, which are essential for regulating physiological processes such as embryonic development and tumor invasion and migration. In this review, the current research progress of migrasomes, including the discovery of migrasomes and migracytosis, the structure of migrasomes, and the distribution and functions of migrasomes is discussed. The migratory marker protein TSPAN4 is highly expressed in various cancers and is associated with cancer invasion and migration. Therefore, there is still much research space for the pathogenesis of migratory bodies and cancer. This review also makes bold predictions and prospects for the research directions of the combination of migrasomes and clinical applications.
Collapse
Affiliation(s)
- Yu Zhang
- The Laboratory of Translational Medicine, Hengyang Medical School, University of South China, 28 Changsheng Road, Hengyang 421001, China
| | - Minghui Zhang
- The Laboratory of Translational Medicine, Hengyang Medical School, University of South China, 28 Changsheng Road, Hengyang 421001, China
| | - Zhuoyi Xie
- The Laboratory of Translational Medicine, Hengyang Medical School, University of South China, 28 Changsheng Road, Hengyang 421001, China
| | - Yubo Ding
- Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang 421002, China
| | - Jialu Huang
- The Laboratory of Translational Medicine, Hengyang Medical School, University of South China, 28 Changsheng Road, Hengyang 421001, China
| | - Jingwei Yao
- Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang 421002, China
| | - Yufan Lv
- Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang 421002, China
| | - Jianhong Zuo
- The Laboratory of Translational Medicine, Hengyang Medical School, University of South China, 28 Changsheng Road, Hengyang 421001, China
- Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang 421002, China
- Clinical Laboratory, The Third Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang 421900, China
- Correspondence:
| |
Collapse
|
9
|
Liu H, Chansoria P, Delrot P, Angelidakis E, Rizzo R, Rütsche D, Applegate LA, Loterie D, Zenobi-Wong M. Filamented Light (FLight) Biofabrication of Highly Aligned Tissue-Engineered Constructs. Adv Mater 2022; 34:e2204301. [PMID: 36095325 DOI: 10.1002/adma.202204301] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 09/07/2022] [Indexed: 06/15/2023]
Abstract
Cell-laden hydrogels used in tissue engineering generally lack sufficient 3D topographical guidance for cells to mature into aligned tissues. A new strategy called filamented light (FLight) biofabrication rapidly creates hydrogels composed of unidirectional microfilament networks, with diameters on the length scale of single cells. Due to optical modulation instability, a light beam is divided optically into FLight beams. Local polymerization of a photoactive resin is triggered, leading to local increase in refractive index, which itself creates self-focusing waveguides and further polymerization of photoresin into long hydrogel microfilaments. Diameter and spacing of the microfilaments can be tuned from 2 to 30 µm by changing the coherence length of the light beam. Microfilaments show outstanding cell instructive properties with fibroblasts, tenocytes, endothelial cells, and myoblasts, influencing cell alignment, nuclear deformation, and extracellular matrix deposition. FLight is compatible with multiple types of photoresins and allows for biofabrication of centimeter-scale hydrogel constructs with excellent cell viability within seconds (<10 s per construct). Multidirectional microfilaments are achievable within a single hydrogel construct by changing the direction of FLight projection, and complex multimaterial/multicellular tissue-engineered constructs are possible by sequentially exchanging the cell-laden photoresin. FLight offers a transformational approach to developing anisotropic tissues using photo-crosslinkable biomaterials.
Collapse
Affiliation(s)
- Hao Liu
- Tissue Engineering + Biofabrication Laboratory, Department of Health Sciences & Technology, ETH Zürich, Otto-Stern-Weg 7, Zürich, 8093, Switzerland
| | - Parth Chansoria
- Tissue Engineering + Biofabrication Laboratory, Department of Health Sciences & Technology, ETH Zürich, Otto-Stern-Weg 7, Zürich, 8093, Switzerland
| | - Paul Delrot
- Readily3D SA, EPFL Innovation Park, Lausanne, 1015, Switzerland
| | - Emmanouil Angelidakis
- Tissue Engineering + Biofabrication Laboratory, Department of Health Sciences & Technology, ETH Zürich, Otto-Stern-Weg 7, Zürich, 8093, Switzerland
| | - Riccardo Rizzo
- Tissue Engineering + Biofabrication Laboratory, Department of Health Sciences & Technology, ETH Zürich, Otto-Stern-Weg 7, Zürich, 8093, Switzerland
| | - Dominic Rütsche
- Tissue Engineering + Biofabrication Laboratory, Department of Health Sciences & Technology, ETH Zürich, Otto-Stern-Weg 7, Zürich, 8093, Switzerland
| | - Lee Ann Applegate
- Regenerative Therapy Unit, Plastic, Reconstructive & Hand Surgery, Lausanne University Hospital, University of Lausanne, Epalinges, 1066, Switzerland
| | - Damien Loterie
- Readily3D SA, EPFL Innovation Park, Lausanne, 1015, Switzerland
| | - Marcy Zenobi-Wong
- Tissue Engineering + Biofabrication Laboratory, Department of Health Sciences & Technology, ETH Zürich, Otto-Stern-Weg 7, Zürich, 8093, Switzerland
| |
Collapse
|
10
|
Jana A, Ladner K, Lou E, Nain AS. Tunneling Nanotubes between Cells Migrating in ECM Mimicking Fibrous Environments. Cancers (Basel) 2022; 14:1989. [PMID: 35454893 PMCID: PMC9030013 DOI: 10.3390/cancers14081989] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 04/04/2022] [Indexed: 12/28/2022] Open
Abstract
Simple Summary Tumor cells grow, spread, and invade in a three-dimensional manner, but most experimental approaches in cancer cell biology focus on the behavior of cells in two-dimensional spaces. Patterns of cell invasion and spread in 2D may not accurately depict cell behavior in 3D tumors. We cultivated and investigated malignant mesothelioma cells on a 3D scaffold composed of nanofibers positioned in parallel and crosshatched network configurations to overcome this barrier. We focused on studying long extensions called tunneling nanotubes (TNTs) protruding from cells and connecting with other cells, which have been shown to transmit signals from cell to cell and extend into the tumor microenvironments in a 3D manner. This manuscript describes the biophysics of the formation and function of cancer cell TNTs. These findings will impact the research community by accurately assessing how TNTs affect cancer cell invasion and migration in their natural 3D microenvironment using a novel bioengineered platform. Abstract Tunneling nanotubes (TNTs) comprise a unique class of actin-rich nanoscale membranous protrusions. They enable long-distance intercellular communication and may play an integral role in tumor formation, progression, and drug resistance. TNTs are three-dimensional, but nearly all studies have investigated them using two-dimensional cell culture models. Here, we applied a unique 3D culture platform consisting of crosshatched and aligned fibers to fabricate synthetic suspended scaffolds that mimic the native fibrillar architecture of tumoral extracellular matrix (ECM) to characterize TNT formation and function in its native state. TNTs are upregulated in malignant mesothelioma; we used this model to analyze the biophysical properties of TNTs in this 3D setting, including cell migration in relation to TNT dynamics, rate of TNT-mediated intercellular transport of cargo, and conformation of TNT-forming cells. We found that highly migratory elongated cells on aligned fibers formed significantly longer but fewer TNTs than uniformly spread cells on crossing fibers. We developed new quantitative metrics for the classification of TNT morphologies based on shape and cytoskeletal content using confocal microscopy. In sum, our strategy for culturing cells in ECM-mimicking bioengineered scaffolds provides a new approach for accurate biophysical and biologic assessment of TNT formation and structure in native fibrous microenvironments.
Collapse
|
11
|
Korkmazhan E, Kennard AS, Garzon-Coral C, Vasquez CG, Dunn AR. Tether-guided lamellipodia enable rapid wound healing. Biophys J 2022; 121:1029-1037. [PMID: 35167863 PMCID: PMC8943750 DOI: 10.1016/j.bpj.2022.02.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 12/15/2021] [Accepted: 02/03/2022] [Indexed: 11/20/2022] Open
Abstract
Adhesion between animal cells and the underlying extracellular matrix is challenged during wounding, cell division, and a variety of pathological processes. How cells recover adhesion in the immediate aftermath of detachment from the extracellular matrix remains incompletely understood, due in part to technical limitations. Here, we used acute chemical and mechanical perturbations to examine how epithelial cells respond to partial delamination events. In both cases, we found that cells extended lamellipodia to establish readhesion within seconds of detachment. These lamellipodia were guided by sparse membrane tethers whose tips remained attached to their original points of adhesion, yielding lamellipodia that appear to be qualitatively distinct from those observed during cell migration. In vivo measurements in the context of a zebrafish wound assay showed a similar behavior, in which membrane tethers guided rapidly extending lamellipodia. In the case of mechanical wounding events, cells selectively extended tether-guided lamellipodia in the direction opposite of the pulling force, resulting in the rapid reestablishment of contact with the substrate. We suggest that membrane tether-guided lamellipodial respreading may represent a general mechanism to reestablish tissue integrity in the face of acute disruption.
Collapse
Affiliation(s)
- Elgin Korkmazhan
- Graduate Program in Biophysics, Stanford University, Stanford, California; Department of Chemical Engineering, Stanford University, Stanford, California
| | - Andrew S Kennard
- Department of Biology and Howard Hughes Medical Institute, University of Washington, Seattle, Washington
| | - Carlos Garzon-Coral
- Department of Chemical Engineering, Stanford University, Stanford, California
| | - Claudia G Vasquez
- Department of Chemical Engineering, Stanford University, Stanford, California
| | - Alexander R Dunn
- Department of Chemical Engineering, Stanford University, Stanford, California.
| |
Collapse
|
12
|
Abstract
As part of the connective tissue, activated fibroblasts play an important role in development and disease pathogenesis, while quiescent resident fibroblasts are responsible for sustaining tissue homeostasis. Fibroblastic activation is particularly evident in the tumor microenvironment where fibroblasts transition into tumor-supporting cancer-associated fibroblasts (CAFs), with some CAFs maintaining tumor-suppressive functions. While the tumor-supporting features of CAFs and their fibroblast-like precursors predominantly function through paracrine chemical communication (e.g., secretion of cytokine, chemokine, and more), the direct cell-cell communication that occurs between fibroblasts and other cells, and the effect that the remodeled CAF-generated interstitial extracellular matrix has in these types of cellular communications, remain poorly understood. Here, we explore the reported roles fibroblastic cell-cell communication play within the cancer stroma context and highlight insights we can gain from other disciplines.
Collapse
Affiliation(s)
| | - Edna Cukierman
- Cancer Signaling and Epigenetics Program, Marvin and Concetta Greenberg Pancreatic Cancer Institute, Fox Chase Cancer Center, Temple Health, Philadelphia, PA, United States.
| |
Collapse
|
13
|
Khaddaj-Mallat R, Aldib N, Bernard M, Paquette AS, Ferreira A, Lecordier S, Saghatelyan A, Flamand L, ElAli A. SARS-CoV-2 deregulates the vascular and immune functions of brain pericytes via Spike protein. Neurobiol Dis 2021; 161:105561. [PMID: 34780863 PMCID: PMC8590447 DOI: 10.1016/j.nbd.2021.105561] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [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: 06/15/2021] [Revised: 11/09/2021] [Accepted: 11/11/2021] [Indexed: 12/13/2022] Open
Abstract
Coronavirus disease 19 (COVID-19) is a respiratory illness caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). COVID-19 pathogenesis causes vascular-mediated neurological disorders via elusive mechanisms. SARS-CoV-2 infects host cells via the binding of viral Spike (S) protein to transmembrane receptor, angiotensin-converting enzyme 2 (ACE2). Although brain pericytes were recently shown to abundantly express ACE2 at the neurovascular interface, their response to SARS-CoV-2 S protein is still to be elucidated. Using cell-based assays, we found that ACE2 expression in human brain vascular pericytes was increased upon S protein exposure. Pericytes exposed to S protein underwent profound phenotypic changes associated with an elongated and contracted morphology accompanied with an enhanced expression of contractile and myofibrogenic proteins, such as α-smooth muscle actin (α-SMA), fibronectin, collagen I, and neurogenic locus notch homolog protein-3 (NOTCH3). On the functional level, S protein exposure promoted the acquisition of calcium (Ca2+) signature of contractile ensheathing pericytes characterized by highly regular oscillatory Ca2+ fluctuations. Furthermore, S protein induced lipid peroxidation, oxidative and nitrosative stress in pericytes as well as triggered an immune reaction translated by activation of nuclear factor-kappa-B (NF-κB) signaling pathway, which was potentiated by hypoxia, a condition associated with vascular comorbidities that exacerbate COVID-19 pathogenesis. S protein exposure combined to hypoxia enhanced the production of pro-inflammatory cytokines involved in immune cell activation and trafficking, namely macrophage migration inhibitory factor (MIF). Using transgenic mice expressing the human ACE2 that recognizes S protein, we observed that the intranasal infection with SARS-CoV-2 rapidly induced hypoxic/ischemic-like pericyte reactivity in the brain of transgenic mice, accompanied with an increased vascular expression of ACE2. Moreover, we found that SARS-CoV-2 S protein accumulated in the intranasal cavity reached the brain of mice in which the nasal mucosa is deregulated. Collectively, these findings suggest that SARS-CoV-2 S protein impairs the vascular and immune regulatory functions of brain pericytes, which may account for vascular-mediated brain damage. Our study provides a better understanding for the mechanisms underlying cerebrovascular disorders in COVID-19, paving the way to develop new therapeutic interventions.
Collapse
MESH Headings
- Actins/metabolism
- Angiotensin-Converting Enzyme 2/drug effects
- Angiotensin-Converting Enzyme 2/genetics
- Angiotensin-Converting Enzyme 2/metabolism
- Animals
- Brain/blood supply
- Brain/metabolism
- COVID-19/metabolism
- COVID-19/physiopathology
- Calcium Signaling
- Collagen Type I/metabolism
- Fibronectins/metabolism
- Humans
- Hypoxia/metabolism
- Hypoxia-Ischemia, Brain/metabolism
- Hypoxia-Ischemia, Brain/physiopathology
- Inflammation/metabolism
- Lipid Peroxidation/drug effects
- Lipid Peroxidation/genetics
- Macrophage Migration-Inhibitory Factors/drug effects
- Macrophage Migration-Inhibitory Factors/metabolism
- Mice
- Mice, Transgenic
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/cytology
- Myocytes, Smooth Muscle/metabolism
- Myofibroblasts
- NF-kappa B/drug effects
- NF-kappa B/metabolism
- Nasal Mucosa
- Nitrosative Stress
- Oxidative Stress
- Pericytes/cytology
- Pericytes/drug effects
- Pericytes/metabolism
- Phenotype
- Receptor, Notch3/metabolism
- Receptors, Coronavirus/drug effects
- Receptors, Coronavirus/genetics
- Receptors, Coronavirus/metabolism
- SARS-CoV-2/metabolism
- Spike Glycoprotein, Coronavirus/metabolism
- Spike Glycoprotein, Coronavirus/pharmacology
Collapse
Affiliation(s)
- Rayan Khaddaj-Mallat
- Neuroscience Axis, Research Center of CHU de Québec - Université Laval, Quebec City, QC, Canada; Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Natija Aldib
- Neuroscience Axis, Research Center of CHU de Québec - Université Laval, Quebec City, QC, Canada; Research Center CERVO, Quebec City, QC, Canada; Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Maxime Bernard
- Neuroscience Axis, Research Center of CHU de Québec - Université Laval, Quebec City, QC, Canada; Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Anne-Sophie Paquette
- Neuroscience Axis, Research Center of CHU de Québec - Université Laval, Quebec City, QC, Canada; Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Aymeric Ferreira
- Research Center CERVO, Quebec City, QC, Canada; Department of Computer Science and Software Engineering, Université Laval, Quebec City, QC, Canada
| | - Sarah Lecordier
- Neuroscience Axis, Research Center of CHU de Québec - Université Laval, Quebec City, QC, Canada; Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Armen Saghatelyan
- Research Center CERVO, Quebec City, QC, Canada; Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Louis Flamand
- Neuroscience Axis, Research Center of CHU de Québec - Université Laval, Quebec City, QC, Canada; Department of Microbiology, Infectious Diseases and Immunology, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Ayman ElAli
- Neuroscience Axis, Research Center of CHU de Québec - Université Laval, Quebec City, QC, Canada; Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada.
| |
Collapse
|
14
|
Cisterna B, Costanzo M, Lacavalla MA, Galiè M, Angelini O, Tabaracci G, Malatesta M. Low Ozone Concentrations Differentially Affect the Structural and Functional Features of Non-Activated and Activated Fibroblasts In Vitro. Int J Mol Sci 2021; 22:10133. [PMID: 34576295 PMCID: PMC8466365 DOI: 10.3390/ijms221810133] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 08/29/2021] [Revised: 09/13/2021] [Accepted: 09/17/2021] [Indexed: 12/13/2022] Open
Abstract
Oxygen-ozone (O2-O3) therapy is increasingly applied as a complementary/adjuvant treatment for several diseases; however, the biological mechanisms accounting for the efficacy of low O3 concentrations need further investigations to understand the possibly multiple effects on the different cell types. In this work, we focused our attention on fibroblasts as ubiquitous connective cells playing roles in the body architecture, in the homeostasis of tissue-resident cells, and in many physiological and pathological processes. Using an established human fibroblast cell line as an in vitro model, we adopted a multimodal approach to explore a panel of cell structural and functional features, combining light and electron microscopy, Western blot analysis, real-time quantitative polymerase chain reaction, and multiplex assays for cytokines. The administration of O2-O3 gas mixtures induced multiple effects on fibroblasts, depending on their activation state: in non-activated fibroblasts, O3 stimulated proliferation, formation of cell surface protrusions, antioxidant response, and IL-6 and TGF-β1 secretion, while in LPS-activated fibroblasts, O3 stimulated only antioxidant response and cytokines secretion. Therefore, the low O3 concentrations used in this study induced activation-like responses in non-activated fibroblasts, whereas in already activated fibroblasts, the cell protective capability was potentiated.
Collapse
Affiliation(s)
- Barbara Cisterna
- Department of Neurosciences, Biomedicine and Movement Sciences, Anatomy and Histology Section, University of Verona, Strada Le Grazie 8, I-37134 Verona, Italy; (B.C.); (M.C.); (M.A.L.); (M.G.)
| | - Manuela Costanzo
- Department of Neurosciences, Biomedicine and Movement Sciences, Anatomy and Histology Section, University of Verona, Strada Le Grazie 8, I-37134 Verona, Italy; (B.C.); (M.C.); (M.A.L.); (M.G.)
| | - Maria Assunta Lacavalla
- Department of Neurosciences, Biomedicine and Movement Sciences, Anatomy and Histology Section, University of Verona, Strada Le Grazie 8, I-37134 Verona, Italy; (B.C.); (M.C.); (M.A.L.); (M.G.)
| | - Mirco Galiè
- Department of Neurosciences, Biomedicine and Movement Sciences, Anatomy and Histology Section, University of Verona, Strada Le Grazie 8, I-37134 Verona, Italy; (B.C.); (M.C.); (M.A.L.); (M.G.)
| | - Osvaldo Angelini
- San Rocco Clinic, Via Monsignor G.V. Moreni 95, I-25018 Montichari, Italy; (O.A.); (G.T.)
| | - Gabriele Tabaracci
- San Rocco Clinic, Via Monsignor G.V. Moreni 95, I-25018 Montichari, Italy; (O.A.); (G.T.)
| | - Manuela Malatesta
- Department of Neurosciences, Biomedicine and Movement Sciences, Anatomy and Histology Section, University of Verona, Strada Le Grazie 8, I-37134 Verona, Italy; (B.C.); (M.C.); (M.A.L.); (M.G.)
| |
Collapse
|
15
|
Xu Y, Koya R, Ask K, Zhao R. Engineered microenvironment for the study of myofibroblast mechanobiology. Wound Repair Regen 2021; 29:588-596. [PMID: 34118169 PMCID: PMC8254796 DOI: 10.1111/wrr.12955] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 06/10/2021] [Accepted: 06/10/2021] [Indexed: 12/14/2022]
Abstract
Myofibroblasts are mechanosensitive cells and a variety of their behaviours including differentiation, migration, force production and biosynthesis are regulated by the surrounding microenvironment. Engineered cell culture models have been developed to examine the effect of microenvironmental factors such as the substrate stiffness, the topography and strain of the extracellular matrix (ECM) and the shear stress on myofibroblast biology. These engineered models provide well-mimicked, pathophysiologically relevant experimental conditions that are superior to those enabled by the conventional two-dimensional (2D) culture models. In this perspective, we will review the recent advances in the development of engineered cell culture models for myofibroblasts and outline the findings on the myofibroblast mechanobiology under various microenvironmental conditions. These studies have demonstrated the power and utility of the engineered models for the study of microenvironment-regulated cellular behaviours. The findings derived using these models contribute to a greater understanding of how myofibroblast behaviour is regulated in tissue repair and pathological scar formation.
Collapse
Affiliation(s)
- Ying Xu
- Department of Biomedical Engineering, State University of New York at Buffalo, Buffalo, NY 14260, USA
| | - Richard Koya
- Department of Obstetrics and Gynecology, University of Chicago Comprehensive Cancer Center, Biological Sciences Division, University of Chicago School of Medicine, Chicago, IL 60637, USA
| | - Kjetil Ask
- Department of Medicine, Div. Respirology, McMaster University, Hamilton, ON, Canada L8N 4A6
- The Research Institute of St. Joe’s Hamilton, Firestone Institute for Respiratory Health, Hamilton, ON, Canada L8N 4A6
| | - Ruogang Zhao
- Department of Biomedical Engineering, State University of New York at Buffalo, Buffalo, NY 14260, USA
| |
Collapse
|
16
|
Padhi A, Danielsson BE, Alabduljabbar DS, Wang J, Conway DE, Kapania RK, Nain AS. Cell Fragment Formation, Migration, and Force Exertion on Extracellular Mimicking Fiber Nanonets. Adv Biol (Weinh) 2021; 5:e2000592. [PMID: 33759402 DOI: 10.1002/adbi.202000592] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/01/2021] [Indexed: 12/16/2022]
Abstract
Cell fragments devoid of the nucleus play an essential role in intercellular communication. Mostly studied on flat 2D substrates, their origins and behavior in native fibrous environments remain unknown. Here, cytoplasmic fragments' spontaneous formation and behavior in suspended extracellular matrices mimicking fiber architectures (parallel, crosshatch, and hexagonal) are described. After cleaving from the parent cell body, the fragments of diverse shapes on fibers migrate faster compared to 2D. Furthermore, while fragments in 2D are mostly circular, a higher number of rectangular and blob-like shapes are formed on fibers, and, interestingly, each shape is capable of forming protrusive structures. Absent in 2D, fibers' fragments display oscillatory migratory behavior with dramatic shape changes, sometimes remarkably sustained over long durations (>20 h). Immunostaining reveals paxillin distribution along fragment body-fiber length, while Forster Resonance Energy Transfer imaging of vinculin reveals mechanical loading of fragment adhesions comparable to whole cell adhesions. Using nanonet force microscopy, the forces exerted by fragments are estimated, and peculiarly small area fragments can exert forces similar to larger fragments in a Rho-associated kinase dependent manner. Overall, fragment dynamics on 2D substrates are insufficient to describe the mechanosensitivity of fragments to fibers, and the architecture of fiber networks can generate entirely new behaviors.
Collapse
Affiliation(s)
- Abinash Padhi
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Brooke E Danielsson
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia, 23284, USA
| | - Deema S Alabduljabbar
- Department of Biomedical Engineering, University of California, Davis, CA, 95616, USA
| | - Ji Wang
- Department of Engineering Science and Mechanics, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Daniel E Conway
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia, 23284, USA
| | - Rakesh K Kapania
- Kevin T. Crofton Department of Aerospace and Ocean Engineering, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Amrinder S Nain
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, 24061, USA
| |
Collapse
|
17
|
Abstract
Exogenous high-voltage pulses increase cell membrane permeability through a phenomenon known as electroporation. This process may also disrupt the cell cytoskeleton causing changes in cell contractility; however, the contractile signature of cell force after electroporation remains unknown. Here, single-cell forces post-electroporation are measured using suspended extracellular matrix-mimicking nanofibers that act as force sensors. Ten, 100 μs pulses are delivered at three voltage magnitudes (500, 1000, and 1500 V) and two directions (parallel and perpendicular to cell orientation), exposing glioblastoma cells to electric fields between 441 V cm-1 and 1366 V cm-1. Cytoskeletal-driven force loss and recovery post-electroporation involves three distinct stages. Low electric field magnitudes do not cause disruption, but higher fields nearly eliminate contractility 2-10 min post-electroporation as cells round following calcium-mediated retraction (stage 1). Following rounding, a majority of analyzed cells enter an unusual and unexpected biphasic stage (stage 2) characterized by increased contractility tens of minutes post-electroporation, followed by force relaxation. The biphasic stage is concurrent with actin disruption-driven blebbing. Finally, cells elongate and regain their pre-electroporation morphology and contractility in 1-3 h (stage 3). With increasing voltages applied perpendicular to cell orientation, we observe a significant drop in cell viability. Experiments with multiple healthy and cancerous cell lines demonstrate that contractile force is a more dynamic and sensitive metric than cell shape to electroporation. A mechanobiological understanding of cell contractility post-electroporation will deepen our understanding of the mechanisms that drive recovery and may have implications for molecular medicine, genetic engineering, and cellular biophysics.
Collapse
Affiliation(s)
- Philip M Graybill
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Aniket Jana
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Rakesh K Kapania
- Department of Aerospace and Ocean Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Amrinder S Nain
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
- School of Biomedical Engineering and Sciences, Virginia Tech-Wake Forest University, Blacksburg, Virginia 24061, United States
| | - Rafael V Davalos
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
- School of Biomedical Engineering and Sciences, Virginia Tech-Wake Forest University, Blacksburg, Virginia 24061, United States
| |
Collapse
|
18
|
Zhang Y, Yan Z, Xia X, Lin Y. A Novel Electroporation System for Living Cell Staining and Membrane Dynamics Interrogation. Micromachines (Basel) 2020; 11:E767. [PMID: 32796554 PMCID: PMC7466103 DOI: 10.3390/mi11080767] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/07/2020] [Accepted: 08/10/2020] [Indexed: 12/11/2022]
Abstract
A novel electroporation system was developed to introduce transient membrane pores to cells in a spatially and temporally controlled manner, allowing us to achieve fast electrotransfection and live cell staining as well as to systematically interrogate the dynamics of the cell membrane. Specifically, using this platform, we showed that both reversible and irreversible electroporation could be induced in the cell population, with nano-sized membrane pores in the former case being able to self-reseal in ~10 min. In addition, green fluorescent protein(GFP)-vinculin plasmid and 543 phalloidin have been delivered successively into fibroblast cells, which enables us to monitor the distinct roles of vinculin and F-actin in cell adhesion and migration as well as their possible interplay during these processes. Compared to conventional bulk electroporation and staining methods, the new system offers advantages such as low-voltage operation, cellular level manipulation and testing, fast and adjustable transfection/staining and real-time monitoring; the new system therefore could be useful in different biophysical studies in the future.
Collapse
Affiliation(s)
- Yuanjun Zhang
- HKU-Shenzhen Institute of Research and Innovation (HKU-SIRI), Guangdong 518057, China; (Y.Z.); (Z.Y.); (X.X.)
| | - Zishen Yan
- HKU-Shenzhen Institute of Research and Innovation (HKU-SIRI), Guangdong 518057, China; (Y.Z.); (Z.Y.); (X.X.)
| | - Xingyu Xia
- HKU-Shenzhen Institute of Research and Innovation (HKU-SIRI), Guangdong 518057, China; (Y.Z.); (Z.Y.); (X.X.)
| | - Yuan Lin
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, China
| |
Collapse
|