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Garello F, Svenskaya Y, Parakhonskiy B, Filippi M. Micro/Nanosystems for Magnetic Targeted Delivery of Bioagents. Pharmaceutics 2022; 14:pharmaceutics14061132. [PMID: 35745705 PMCID: PMC9230665 DOI: 10.3390/pharmaceutics14061132] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/09/2022] [Accepted: 05/19/2022] [Indexed: 01/09/2023] Open
Abstract
Targeted delivery of pharmaceuticals is promising for efficient disease treatment and reduction in adverse effects. Nano or microstructured magnetic materials with strong magnetic momentum can be noninvasively controlled via magnetic forces within living beings. These magnetic carriers open perspectives in controlling the delivery of different types of bioagents in humans, including small molecules, nucleic acids, and cells. In the present review, we describe different types of magnetic carriers that can serve as drug delivery platforms, and we show different ways to apply them to magnetic targeted delivery of bioagents. We discuss the magnetic guidance of nano/microsystems or labeled cells upon injection into the systemic circulation or in the tissue; we then highlight emergent applications in tissue engineering, and finally, we show how magnetic targeting can integrate with imaging technologies that serve to assist drug delivery.
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Affiliation(s)
- Francesca Garello
- Molecular and Preclinical Imaging Centers, Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, 10126 Torino, Italy;
| | - Yulia Svenskaya
- Science Medical Center, Saratov State University, 410012 Saratov, Russia;
| | - Bogdan Parakhonskiy
- Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium;
| | - Miriam Filippi
- Soft Robotics Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
- Correspondence:
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2
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Boosz P, Pfister F, Stein R, Friedrich B, Fester L, Band J, Mühlberger M, Schreiber E, Lyer S, Dudziak D, Alexiou C, Janko C. Citrate-Coated Superparamagnetic Iron Oxide Nanoparticles Enable a Stable Non-Spilling Loading of T Cells and Their Magnetic Accumulation. Cancers (Basel) 2021; 13:4143. [PMID: 34439296 PMCID: PMC8394404 DOI: 10.3390/cancers13164143] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 08/10/2021] [Accepted: 08/13/2021] [Indexed: 02/07/2023] Open
Abstract
T cell infiltration into a tumor is associated with a good clinical prognosis of the patient and adoptive T cell therapy can increase anti-tumor immune responses. However, immune cells are often excluded from tumor infiltration and can lack activation due to the immune-suppressive tumor microenvironment. To make T cells controllable by external forces, we loaded primary human CD3+ T cells with citrate-coated superparamagnetic iron oxide nanoparticles (SPIONs). Since the efficacy of magnetic targeting depends on the amount of SPION loading, we investigated how experimental conditions influence nanoparticle uptake and viability of cells. We found that loading in the presence of serum improved both the colloidal stability of SPIONs and viability of T cells, whereas stimulation with CD3/CD28/CD2 and IL-2 did not influence nanoparticle uptake. Furthermore, SPION loading did not impair cytokine secretion after polyclonal stimulation. We finally achieved 1.4 pg iron loading per cell, which was both located intracellularly in vesicles and bound to the plasma membrane. Importantly, nanoparticles did not spill over to non-loaded cells. Since SPION-loading enabled efficient magnetic accumulation of T cells in vitro under dynamic conditions, we conclude that this might be a good starting point for the investigation of in vivo delivery of immune cells.
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Affiliation(s)
- Philipp Boosz
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung Professorship, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (P.B.); (F.P.); (R.S.); (B.F.); (J.B.); (M.M.); (E.S.); (S.L.); (C.A.)
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany
| | - Felix Pfister
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung Professorship, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (P.B.); (F.P.); (R.S.); (B.F.); (J.B.); (M.M.); (E.S.); (S.L.); (C.A.)
| | - Rene Stein
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung Professorship, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (P.B.); (F.P.); (R.S.); (B.F.); (J.B.); (M.M.); (E.S.); (S.L.); (C.A.)
| | - Bernhard Friedrich
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung Professorship, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (P.B.); (F.P.); (R.S.); (B.F.); (J.B.); (M.M.); (E.S.); (S.L.); (C.A.)
| | - Lars Fester
- Institute of Anatomy and Cell Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany;
| | - Julia Band
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung Professorship, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (P.B.); (F.P.); (R.S.); (B.F.); (J.B.); (M.M.); (E.S.); (S.L.); (C.A.)
| | - Marina Mühlberger
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung Professorship, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (P.B.); (F.P.); (R.S.); (B.F.); (J.B.); (M.M.); (E.S.); (S.L.); (C.A.)
| | - Eveline Schreiber
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung Professorship, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (P.B.); (F.P.); (R.S.); (B.F.); (J.B.); (M.M.); (E.S.); (S.L.); (C.A.)
| | - Stefan Lyer
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung Professorship, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (P.B.); (F.P.); (R.S.); (B.F.); (J.B.); (M.M.); (E.S.); (S.L.); (C.A.)
| | - Diana Dudziak
- Laboratory of Dendritic Cell Biology, Department of Dermatology, Universitätsklinikum Erlangen, 91054 Erlangen, Germany;
- Deutsches Zentrum Immuntherapie (DZI), 91054 Erlangen, Germany
- Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), 91054 Erlangen, Germany
- Medical Immunology Campus Erlangen, 91054 Erlangen, Germany
| | - Christoph Alexiou
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung Professorship, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (P.B.); (F.P.); (R.S.); (B.F.); (J.B.); (M.M.); (E.S.); (S.L.); (C.A.)
| | - Christina Janko
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung Professorship, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (P.B.); (F.P.); (R.S.); (B.F.); (J.B.); (M.M.); (E.S.); (S.L.); (C.A.)
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Wang Q, Wu H. Mathematical modeling of chemotaxis guided amoeboid cell swimming. Phys Biol 2021; 18. [PMID: 33853049 DOI: 10.1088/1478-3975/abf7d8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 04/14/2021] [Indexed: 01/15/2023]
Abstract
Cells and microorganisms adopt various strategies to migrate in response to different environmental stimuli. To date, many modeling research has focused on the crawling-basedDictyostelium discoideum(Dd) cells migration induced by chemotaxis, yet recent experimental results reveal that even without adhesion or contact to a substrate, Dd cells can still swim to follow chemoattractant signals. In this paper, we develop a modeling framework to investigate the chemotaxis induced amoeboid cell swimming dynamics. A minimal swimming system consists of one deformable Dd amoeboid cell and a dilute suspension of bacteria, and the bacteria produce chemoattractant signals that attract the Dd cell. We use themathematical amoeba modelto generate Dd cell deformation and solve the resulting low Reynolds number flows, and use a moving mesh based finite volume method to solve the reaction-diffusion-convection equation. Using the computational model, we show that chemotaxis guides a swimming Dd cell to follow and catch bacteria, while on the other hand, bacterial rheotaxis may help the bacteria to escape from the predator Dd cell.
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Affiliation(s)
- Qixuan Wang
- Department of Mathematics, University of California, Riverside, CA, United States of America.,Interdisciplinary Center for Quantitative Modeling in Biology, University of California, Riverside, CA, United States of America
| | - Hao Wu
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA, United States of America
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Zhu X, Bouffanais R, Yue DKP. Persistent cellular motion control and trapping using mechanotactic signaling. PLoS One 2014; 9:e105406. [PMID: 25207940 PMCID: PMC4160188 DOI: 10.1371/journal.pone.0105406] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 07/19/2014] [Indexed: 11/19/2022] Open
Abstract
Chemotactic signaling and the associated directed cell migration have been extensively studied owing to their importance in emergent processes of cellular aggregation. In contrast, mechanotactic signaling has been relatively overlooked despite its potential for unique ways to artificially signal cells with the aim to effectively gain control over their motile behavior. The possibility of mimicking cellular mechanotactic signals offers a fascinating novel strategy to achieve targeted cell delivery for in vitro tissue growth if proven to be effective with mammalian cells. Using (i) optimal level of extracellular calcium ([Ca2+ ]ext mM) we found, (ii) controllable fluid shear stress of low magnitude (), and (iii) the ability to swiftly reverse flow direction (within one second), we are able to successfully signal Dictyostelium discoideum amoebae and trigger migratory responses with heretofore unreported control and precision. Specifically, we are able to systematically determine the mechanical input signal required to achieve any predetermined sequences of steps including straightforward motion, reversal and trapping. The mechanotactic cellular trapping is achieved for the first time and is associated with a stalling frequency of Hz for a reversing direction mechanostimulus, above which the cells are effectively trapped while maintaining a high level of directional sensing. The value of this frequency is very close to the stalling frequency recently reported for chemotactic cell trapping [Meier B, et al. (2011) Proc Natl Acad Sci USA 108:11417–11422], suggesting that the limiting factor may be the slowness of the internal chemically-based motility apparatus.
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Affiliation(s)
- Xiaoying Zhu
- Singapore University of Technology and Design, Singapore, Singapore
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Roland Bouffanais
- Singapore University of Technology and Design, Singapore, Singapore
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
- * E-mail:
| | - Dick K. P. Yue
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
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Kolosnjaj-Tabi J, Wilhelm C, Clément O, Gazeau F. Cell labeling with magnetic nanoparticles: opportunity for magnetic cell imaging and cell manipulation. J Nanobiotechnology 2013; 11 Suppl 1:S7. [PMID: 24564857 PMCID: PMC4029272 DOI: 10.1186/1477-3155-11-s1-s7] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
This tutorial describes a method of controlled cell labeling with citrate-coated ultra small superparamagnetic iron oxide nanoparticles. This method may provide basically all kinds of cells with sufficient magnetization to allow cell detection by high-resolution magnetic resonance imaging (MRI) and to enable potential magnetic manipulation. In order to efficiently exploit labeled cells, quantify the magnetic load and deliver or follow-up magnetic cells, we herein describe the main requirements that should be applied during the labeling procedure. Moreover we present some recommendations for cell detection and quantification by MRI and detail magnetic guiding on some real-case studies in vitro and in vivo.
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Sensenig R, Sapir Y, MacDonald C, Cohen S, Polyak B. Magnetic nanoparticle-based approaches to locally target therapy and enhance tissue regeneration in vivo. Nanomedicine (Lond) 2013; 7:1425-42. [PMID: 22994959 DOI: 10.2217/nnm.12.109] [Citation(s) in RCA: 134] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Magnetic-based systems utilizing superparamagnetic nanoparticles and a magnetic field gradient to exert a force on these particles have been used in a wide range of biomedical applications. This review is focused on drug targeting applications that require penetration of a cellular barrier as well as strategies to improve the efficacy of targeting in these biomedical applications. Another focus of this review is regenerative applications utilizing tissue engineered scaffolds prepared with the aid of magnetic particles, the use of remote actuation for release of bioactive molecules and magneto-mechanical cell stimulation, cell seeding and cell patterning.
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Affiliation(s)
- Richard Sensenig
- Department of Surgery, Drexel University College of Medicine, PA 19102, USA
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Frasca G, Gazeau F, Wilhelm C. De la cellule au tissu : le magnétisme auxiliaire de la biomédecine. ACTA ACUST UNITED AC 2011. [DOI: 10.1051/refdp/2011236] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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8
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Bouffanais R, Yue DKP. Hydrodynamics of cell-cell mechanical signaling in the initial stages of aggregation. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 81:041920. [PMID: 20481766 DOI: 10.1103/physreve.81.041920] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Revised: 03/17/2010] [Indexed: 05/29/2023]
Abstract
Mechanotactic cell motility has recently been shown to be a key player in the initial aggregation of crawling cells such as leukocytes and amoebae. The effects of mechanotactic signaling in the early aggregation of amoeboid cells are here investigated using a general mathematical model based on known biological evidence. We elucidate the hydrodynamic fundamentals of the direct guiding of a cell through mechanotaxis in the case where one cell transmits a mechanotactic signal through the fluid flow by changing its shape. It is found that any mechanosensing cells placed in the stimulus field of mechanical stress are able to determine the signal transmission direction with a certain angular dispersion which does not preclude the aggregation from happening. The ubiquitous presence of noise is accounted for by the model. Finally, the mesoscopic pattern of aggregation is obtained which constitutes the bridge between, on one hand, the microscopic world where the changes in the cell shape occur and, on the other hand, the cooperative behavior of the cells at the mesoscopic scale.
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Affiliation(s)
- Roland Bouffanais
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
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9
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Magnetic labeling, imaging and manipulation of endothelial progenitor cells using iron oxide nanoparticles. Future Med Chem 2010; 2:397-408. [DOI: 10.4155/fmc.09.165] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Endothelial progenitor cells (EPCs), originating from bone marrow, play a significant role in the repair of ischemic tissue and injured blood vessels. They are also involved in tumor angiogenesis. The therapeutic potential of EPCs for regenerative medicine and cancer treatment calls for new methods for monitoring and controlling cell migration. This review focuses on promising magnetic methods based on the internalization of magnetic nanoparticles by EPCs. We first describe the cellular uptake of iron oxide nanoparticles depending on their surface properties. We thus review the use of MRI for the detection of labeled cells and for noninvasive follow-up of EPCs homing in sites of endothelium regeneration. Finally, we show that remotely applied magnetic forces may enable intracellular manipulation and may optimize cell-delivery strategies for localizing cell therapy to target sites.
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Frasca G, Gazeau F, Wilhelm C. Formation of a three-dimensional multicellular assembly using magnetic patterning. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:2348-2354. [PMID: 19166275 DOI: 10.1021/la8030792] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We demonstrate a facile approach to design three-dimensional cellular assembly of tunable size and controlled geometry with applications for tissue engineering. Three-dimensional cell patterning was performed using external magnetic forces, without the need for substrate chemical or physical modifications. Human endothelial progenitor cells and mouse macrophages were magnetically labeled using anionic citrate-coated iron oxide nanoparticles. Two magnetic tips were designed, and their magnetic field cartographies were calibrated. The focalized magnetic force generated ensured an efficient entrapment of the cells at the tips vicinity. By tuning the magnetic field gradient geometry and intensity, the magnetic cellular load, and the number of cells, we fully described the formation of the three-dimensional multicellular assemblies, and estimated the corresponding packing factor for a large range of experimental conditions.
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Affiliation(s)
- Guillaume Frasca
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057 CNRS & Université Paris-Diderot, Paris Cedex 13, F-75205, France
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Luciani A, Wilhelm C, Bruneval P, Cunin P, Autret G, Rahmouni A, Clément O, Gazeau F. Magnetic targeting of iron-oxide-labeled fluorescent hepatoma cells to the liver. Eur Radiol 2009; 19:1087-96. [PMID: 19137308 DOI: 10.1007/s00330-008-1262-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2008] [Revised: 10/28/2008] [Accepted: 11/01/2008] [Indexed: 10/21/2022]
Abstract
The purpose of this study was to determine whether an external magnet field can induce preferential trafficking of magnetically labeled Huh7 hepatoma cells to the liver following liver cell transplantation. Huh7 hepatoma cells were labeled with anionic magnetic nanoparticles (AMNP) and tagged with a fluorescent membrane marker (PKH67). Iron-uptake was measured by magnetophoresis. Twenty C57Bl6 mice received an intrasplenic injection of 2 x 10(6) labeled cells. An external magnet (0.29 T; 25 T/m) was placed over the liver of 13 randomly selected animals (magnet group), while the remaining 7 animals served as controls. MRI (1.5 T) and confocal fluorescence microscopy (CFM) were performed 10 days post-transplantation. The presence and location of labeled cells within the livers were compared in the magnet group and controls, and confronted with histological analysis representing the standard of reference. Mean iron content per cell was 6 pg. Based on histology, labeled cells were more frequently present within recipient livers in the magnet group (p < 0.01) where their distribution was preferentially peri-vascular (p < 0.05). MRI and CFM gave similar results for the overall detection of transplanted cells (kappa = 0.828) and for the identification of peri-vascular cells (kappa = 0.78). Application of an external magnet can modify the trafficking of transplanted cells, especially by promoting the formation of perivascular aggregates.
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Affiliation(s)
- Alain Luciani
- Laboratoire de Recherche en Imagerie, EA 4062, Université René Descartes, Hôpital Européen Georges Pompidou, Assistance Publique - Hôpitaux de Paris, 20 rue Leblanc, 75015 Paris, France
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Delanoë-Ayari H, Iwaya S, Maeda YT, Inose J, Rivière C, Sano M, Rieu JP. Changes in the magnitude and distribution of forces at different Dictyostelium developmental stages. ACTA ACUST UNITED AC 2008; 65:314-31. [PMID: 18205201 DOI: 10.1002/cm.20262] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The distribution of forces exerted by migrating Dictyostelium amebae at different developmental stages was measured using traction force microscopy. By using very soft polyacrylamide substrates with a high fluorescent bead density, we could measure stresses as small as 30 Pa. Remarkable differences exist both in term of the magnitude and distribution of forces in the course of development. In the vegetative state, cells present cyclic changes in term of speed and shape between an elongated form and a more rounded one. The forces are larger in this first state, especially when they are symmetrically distributed at the front and rear edge of the cell. Elongated vegetative cells can also present a front-rear asymmetric force distribution with the largest forces in the crescent-shaped rear of the cell (uropod). Pre-aggregating cells, once polarized, only present this last kind of asymmetric distribution with the largest forces in the uropod. Except for speed, no cycle is observed. Neither the force distribution of pre-aggregating cells nor their overall magnitude are modified during chemotaxis, the later being similar to the one of vegetative cells (F(0) approximately 6 nN). On the contrary, both the force distribution and overall magnitude is modified for the fast moving aggregating cells. In particular, these highly elongated cells exert lower forces (F(0) approximately 3 nN). The location of the largest forces in the various stages of the development is consistent with the myosin II localization described in the literature for Dictyostelium (Yumura et al.,1984. J Cell Biol 99:894-899) and is confirmed by preliminary experiments using a GFP-myosin Dictyostelium strain.
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Affiliation(s)
- H Delanoë-Ayari
- Université de Lyon, F-6900, France, Université Lyon 1,CNRS UMR 5586, F-69622 Villeurbanne Cedex, France
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Frasca G, Raynaud F, Bacri JC, Gazeau F, Wilhelm C. Linear patterning of magnetically labeled Dictyostelium cells to display confined development. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2008; 20:204149. [PMID: 21694278 DOI: 10.1088/0953-8984/20/20/204149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In severe nutriment conditions, the social amoeba Dictyostelium discoideum enters a particular life cycle where it forms multicellular patterns to achieve aggregation. Extensively observed from an initial dispersed state, its developmental program can usefully be studied from a confined population to implement theoretical developments regarding biological self-organization. The challenge is then to form a cell assembly of well-defined geometrical dimensions without hindering cell behavior. To achieve this goal, we imposed transient constraints by applying temporary external magnetic gradients to trap magnetically labeled cells. Deposits of various numbers of cells were geometrically characterized for different magnetic exposure conditions. We demonstrated that the cell deposit was organized as a three-dimensional (3D) structure by both stacking layers of cells and extending these layers in the substrate plane. This structure evolves during the aggregation phase, forming periodic aggregative centers along the linear initial pattern.
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Affiliation(s)
- Guillaume Frasca
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057 CNRS et Université Paris-Diderot, Paris, France
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14
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Wilhelm C, Gazeau F. Universal cell labelling with anionic magnetic nanoparticles. Biomaterials 2008; 29:3161-74. [PMID: 18455232 DOI: 10.1016/j.biomaterials.2008.04.016] [Citation(s) in RCA: 239] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2008] [Accepted: 04/01/2008] [Indexed: 01/08/2023]
Abstract
Magnetic labelling of living cells creates opportunities for numerous biomedical applications, from individual cell manipulation to MRI tracking. Here we describe a non-specific labelling method based on anionic magnetic nanoparticles (AMNPs). These particles first adsorb electrostatically to the outer membrane before being internalized within endosomes. We compared the labelling mechanism, uptake efficiency and biocompatibility with 14 different cell types, including adult cells, progenitor cells, immune cells and tumour cells. A single model was found to describe cell/nanoparticle interactions and to predict uptake efficiency by all the cell types. The potential impact of the AMNP label on cell functions, in vitro and in vivo, is discussed according to cellular specificities. We also show that the same label provides sufficient magnetization for MRI detection and distal manipulation.
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Affiliation(s)
- Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057 CNRS et Université Paris-Diderot, Paris, France.
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15
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Wilhelm C, Lavialle F, Péchoux C, Tatischeff I, Gazeau F. Intracellular trafficking of magnetic nanoparticles to design multifunctional biovesicles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2008; 4:577-582. [PMID: 18383444 DOI: 10.1002/smll.200700523] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes (MSC) Université Denis Diderot-Paris 7 CNRS UMR 7057, Bâtiment Condorcet, CC 7056 10 rue Alice Domon et Léonie Duquet, 75205 Paris cedex, France.
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