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Ponomareva S, Joisten H, François T, Naud C, Morel R, Hou Y, Myers T, Joumard I, Dieny B, Carriere M. Magnetic particles for triggering insulin release in INS-1E cells subjected to a rotating magnetic field. NANOSCALE 2022; 14:13274-13283. [PMID: 36056640 DOI: 10.1039/d2nr02009b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Diabetes is a major global health threat. Both academics and industry are striving to develop effective treatments for this disease. In this work, we present a new approach to induce insulin release from β-islet pancreatic cells (INS-1E) by mechanical stimulation. Two types of experiments were carried out. First, a local stimulation was performed by dispersing anisotropic magnetic particles within the cell medium, which settled down almost immediately on cell plasma membranes. Application of a low frequency magnetic field (up to 40 Hz) generated by a custom-made magnetic device resulted in oscillations of these particles, which then exerted a mechanical constraint on the cell plasma membranes. The second type of experiment consisted of a global stimulation, where cells were grown on magneto-elastic membranes composed of a biocompatible polymer with embedded magnetic particles. Upon application of a rotating magnetic field, magnetic particles within the membrane were attracted towards the field source, resulting in the membrane's vibrations being transmitted to the cells grown on it. In both experiments, the cell response to these mechanical stimulations caused by application of the variable magnetic field was quantified via the measurement of insulin release in the growth medium. We demonstrated that the mechanical action induced by the motion of magnetic particles or by membrane vibrations was an efficient stimulus for insulin granule secretion from β-cells. This opens a wide range of possible applications including the design of a system which triggers insulin secretion by β-islet pancreatic cells on demand.
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Affiliation(s)
- Svetlana Ponomareva
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SPINTEC, 38000 Grenoble, France.
| | - Helene Joisten
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SPINTEC, 38000 Grenoble, France.
- Univ. Grenoble Alpes, CEA, Leti, 38000 Grenoble, France
| | - Taina François
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SYMMES, 38000 Grenoble, France.
| | - Cecile Naud
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SPINTEC, 38000 Grenoble, France.
| | - Robert Morel
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SPINTEC, 38000 Grenoble, France.
| | - Yanxia Hou
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SYMMES, 38000 Grenoble, France.
| | - Thomas Myers
- Platform Kinetics, Pegholme, Wharfebank Mills, Otley, LS21 3JP, UK
| | - Isabelle Joumard
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SPINTEC, 38000 Grenoble, France.
| | - Bernard Dieny
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SPINTEC, 38000 Grenoble, France.
| | - Marie Carriere
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SYMMES, 38000 Grenoble, France.
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Magneto-mechanically actuated microstructures to efficiently prevent bacterial biofilm formation. Sci Rep 2020; 10:15470. [PMID: 32963304 PMCID: PMC7508806 DOI: 10.1038/s41598-020-72406-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 08/26/2020] [Indexed: 01/22/2023] Open
Abstract
Biofilm colonisation of surfaces is of critical importance in various areas ranging from indwelling medical devices to industrial setups. Of particular importance is the reduced susceptibility of bacteria embedded in a biofilm to existing antimicrobial agents. In this paper, we demonstrate that remotely actuated magnetic cantilevers grafted on a substrate act efficiently in preventing bacterial biofilm formation. When exposed to an alternating magnetic field, the flexible magnetic cantilevers vertically deflect from their initial position periodically, with an extremely low frequency (0.16 Hz). The cantilevers’ beating prevents the initial stage of bacterial adhesion to the substrate surface and the subsequent biofilm growth. Our experimental data on E. coli liquid cultures demonstrate up to a 70% reduction in biofilm formation. A theoretical model has been developed to predict the amplitude of the cantilevers vertical deflection. Our results demonstrate proof-of-concept for a device that can magneto-mechanically prevent the first stage in bacterial biofilm formation, acting as on-demand fouling release active surfaces.
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Naud C, Thébault C, Carrière M, Hou Y, Morel R, Berger F, Diény B, Joisten H. Cancer treatment by magneto-mechanical effect of particles, a review. NANOSCALE ADVANCES 2020; 2:3632-3655. [PMID: 36132753 PMCID: PMC9419242 DOI: 10.1039/d0na00187b] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 06/19/2020] [Indexed: 05/19/2023]
Abstract
Cancer treatment by magneto-mechanical effect of particles (TMMEP) is a growing field of research. The principle of this technique is to apply a mechanical force on cancer cells in order to destroy them thanks to magnetic particles vibrations. For this purpose, magnetic particles are injected in the tumor or exposed to cancer cells and a low-frequency alternating magnetic field is applied. This therapeutic approach is quite new and a wide range of treatment parameters are explored to date, as described in the literature. This review explains the principle of the technique, summarizes the parameters used by the different groups and reports the main in vitro and in vivo results.
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Affiliation(s)
- Cécile Naud
- Univ. Grenoble Alpes, CEA, CNRS, Spintec 38000 Grenoble France
- BrainTech Lab, U1205, INSERM, Univ. Grenoble Alpes, CHU-Grenoble France
| | | | - Marie Carrière
- Univ. Grenoble Alpes, CEA, CNRS, IRIG-SyMMES 38000 Grenoble France
| | - Yanxia Hou
- Univ. Grenoble Alpes, CEA, CNRS, IRIG-SyMMES 38000 Grenoble France
| | - Robert Morel
- Univ. Grenoble Alpes, CEA, CNRS, Spintec 38000 Grenoble France
| | - François Berger
- BrainTech Lab, U1205, INSERM, Univ. Grenoble Alpes, CHU-Grenoble France
| | - Bernard Diény
- Univ. Grenoble Alpes, CEA, CNRS, Spintec 38000 Grenoble France
| | - Hélène Joisten
- Univ. Grenoble Alpes, CEA, CNRS, Spintec 38000 Grenoble France
- Univ. Grenoble Alpes, CEA, LETI 38000 Grenoble France
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