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Marrero D, Pujol-Vila F, Vera D, Gabriel G, Illa X, Elizalde-Torrent A, Alvarez M, Villa R. Gut-on-a-chip: Mimicking and monitoring the human intestine. Biosens Bioelectron 2021; 181:113156. [DOI: 10.1016/j.bios.2021.113156] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 02/18/2021] [Accepted: 03/05/2021] [Indexed: 02/07/2023]
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Guardiola C, Márquez A, Jiménez-Ramos MC, López JG, Baratto-Roldán A, Muñoz-Berbel X. Dosimetry with gafchromic films based on a new micro-opto-electro-mechanical system. Sci Rep 2021; 11:10414. [PMID: 34001941 PMCID: PMC8129144 DOI: 10.1038/s41598-021-89602-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 04/26/2021] [Indexed: 11/26/2022] Open
Abstract
This work presents the first tests performed with radiochromic films and a new Micro‒Opto‒Electro-Mechanical system (MOEMS) for in situ dosimetry evaluation in radiotherapy in real time. We present a new device and methodology that overcomes the traditional limitation of time-delay in radiochromic film analysis by turning a passive detector into an active sensor. The proposed system consists mainly of an optical sensor based on light emitting diodes and photodetectors controlled by both customized electronic circuit and graphical user interface, which enables optical measurements directly. We show the first trials performed in a low‒energy proton cyclotron with this MOEMS by using gafchromic EBT3 films. Results show the feasibility of using this system for in situ dose evaluations. Further adaptation is ongoing to develop a full real‒time active detector by integrating MOEM multi‒arrays and films in flexible printed circuits. Hence, we point to improve the clinical application of radiochromic films with the aim to optimize radiotherapy treatment verifications.
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Affiliation(s)
- C Guardiola
- Université Paris‒Saclay, CNRS/IN2P3, IJCLab, 91405, Orsay, France.
| | - A Márquez
- Instituto de Microelectrónica de Barcelona, (IMB-CNM, CSIC), 08193, Bellaterra, Spain
| | | | - J García López
- Centro Nacional de Aceleradores, 41092, Sevilla, Spain.,Department of Atomic, Molecular and Nuclear Physics, Universidad de Sevilla, 41012, Sevilla, Spain
| | - A Baratto-Roldán
- Centro Nacional de Aceleradores, 41092, Sevilla, Spain.,Department of Atomic, Molecular and Nuclear Physics, Universidad de Sevilla, 41012, Sevilla, Spain
| | - X Muñoz-Berbel
- Instituto de Microelectrónica de Barcelona, (IMB-CNM, CSIC), 08193, Bellaterra, Spain
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Pujol-Vila F, Aveling Jenkins AT, Muñoz-Berbel X, Mas Gordi J. Nanoplasmonic Paper-Based Platform for General Screening of Biomacromolecules. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2335. [PMID: 33255587 PMCID: PMC7760946 DOI: 10.3390/nano10122335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/20/2020] [Accepted: 11/22/2020] [Indexed: 11/28/2022]
Abstract
Hygiene assessment in industrial and clinical environments is crucial in the prevention of health risks. Current technologies for routine cleanliness evaluation rely on the detection of specific biomolecules, thus requiring more than one test for broad-range screening. Herein, the modulation of the catalytic activity of gold nanoparticles (AuNPs) by biomacromolecules was employed to develop a nanoplasmonic platform for general hygiene screening. AuNPs were immobilized on cellulose paper by simple adsorption. When ferricyanide was dispensed onto the paper, the AuNPs catalysed the ferricyanide's dissociation, releasing free cyanide ions that dissolved them. The AuNP dissolution produced an intense colour shift detectable with the naked eye. When biomacromolecules (e.g., proteins and polysaccharides) were present, they spontaneously attached to AuNPs, forming a biomolecular corona (biocorona), reducing their catalytic activity until complete suppression when the NPs were fully covered by molecules. The concentration-dependent decrease in the catalytic activity was here used to quantify biomacromolecules and complex samples such as milk, eggs, soy sauce and yeast extract (in 20 min), with detection limits comparable to those of standard methods, i.e., 0.25 µg mL-1 for albumin. This nano-enabled technology may be applied as a broad-range (unspecific) alert system for inexpensive cleanliness evaluation, with potential applications in sensitive sectors including productive industries and hospitals.
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Affiliation(s)
- Ferran Pujol-Vila
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Bellaterra, 08193 Barcelona, Spain;
| | | | - Xavier Muñoz-Berbel
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Bellaterra, 08193 Barcelona, Spain;
| | - Jordi Mas Gordi
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, 08193 Barcelona, Spain;
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Vigués N, Pujol-Vila F, Marquez-Maqueda A, Muñoz-Berbel X, Mas J. Electro-addressable conductive alginate hydrogel for bacterial trapping and general toxicity determination. Anal Chim Acta 2018; 1036:115-120. [DOI: 10.1016/j.aca.2018.06.062] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/15/2018] [Accepted: 06/22/2018] [Indexed: 01/01/2023]
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Pujol-Vila F, Dietvorst J, Gall-Mas L, Díaz-González M, Vigués N, Mas J, Muñoz-Berbel X. Bioelectrochromic hydrogel for fast antibiotic-susceptibility testing. J Colloid Interface Sci 2017; 511:251-258. [PMID: 29028576 DOI: 10.1016/j.jcis.2017.09.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 09/01/2017] [Accepted: 09/01/2017] [Indexed: 10/18/2022]
Abstract
Materials science offers new perspectives in the clinical analysis of antimicrobial sensitivity. However, a biomaterial with the capacity to respond to living bacteria has not been developed to date. We present an electrochromic iron(III)-complexed alginate hydrogel sensitive to bacterial metabolism, here applied to fast antibiotic-susceptibility determination. Bacteria under evaluation are entrapped -and pre-concentrated- in the hydrogel matrix by oxidation of iron (II) ions to iron (III) and in situ formation of the alginate hydrogel in less than 2min and in soft experimental conditions (i.e. room temperature, pH 7, aqueous solution). After incubation with the antibiotic (10min), ferricyanide is added to the biomaterial. Bacteria resistant to the antibiotic dose remain alive and reduce ferricyanide to ferrocyanide, which reacts with the iron (III) ions in the hydrogel to produce Prussian Blue molecules. For a bacterial concentration above 107 colony forming units per mL colour development is detectable with the bare eye in less than 20min. The simplicity, sensitivity, low-cost and short response time of the biomaterial and the assay envisages a high impact of these approaches on sensitive sectors such as public health system, food and beverage industries or environmental monitoring.
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Affiliation(s)
- Ferran Pujol-Vila
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain.
| | - Jiri Dietvorst
- Centre Nacional de Microelectrònica (IMB-CNM, CSIC), Bellaterra, Barcelona, Spain
| | - Laura Gall-Mas
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain
| | - María Díaz-González
- Centre Nacional de Microelectrònica (IMB-CNM, CSIC), Bellaterra, Barcelona, Spain
| | - Núria Vigués
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain
| | - Jordi Mas
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain
| | - Xavier Muñoz-Berbel
- Centre Nacional de Microelectrònica (IMB-CNM, CSIC), Bellaterra, Barcelona, Spain
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Zhao S, Chen Y, Partlow BP, Golding AS, Tseng P, Coburn J, Applegate MB, Moreau JE, Omenetto FG, Kaplan DL. Bio-functionalized silk hydrogel microfluidic systems. Biomaterials 2016; 93:60-70. [PMID: 27077566 DOI: 10.1016/j.biomaterials.2016.03.041] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2015] [Revised: 03/05/2016] [Accepted: 03/28/2016] [Indexed: 12/16/2022]
Abstract
Bio-functionalized microfluidic systems were developed based on a silk protein hydrogel elastomeric materials. A facile multilayer fabrication method using gelatin sacrificial molding and layer-by-layer assembly was implemented to construct interconnected, three dimensional (3D) microchannel networks in silk hydrogels at 100 μm minimum feature resolution. Mechanically activated valves were implemented to demonstrate pneumatic control of microflow. The silk hydrogel microfluidics exhibit controllable mechanical properties, long-term stability in various environmental conditions, tunable in vitro and in vivo degradability in addition to optical transparency, providing unique features for cell/tissue-related applications than conventional polydimethylsiloxane (PDMS) and existing hydrogel-based microfluidic options. As demonstrated in the work here, the all aqueous-based fabrication process at ambient conditions enabled the incorporation of active biological substances in the bulk phase of these new silk microfluidic systems during device fabrication, including enzymes and living cells, which are able to interact with the fluid flow in the microchannels. These silk hydrogel-based microfluidic systems offer new opportunities in engineering active diagnostic devices, tissues and organs that could be integrated in vivo, and for on-chip cell sensing systems.
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Affiliation(s)
- Siwei Zhao
- Department of Biomedical Engineering, Tufts University, 4 Colby St. Medford, MA 02155, USA
| | - Ying Chen
- Department of Biomedical Engineering, Tufts University, 4 Colby St. Medford, MA 02155, USA
| | - Benjamin P Partlow
- Department of Biomedical Engineering, Tufts University, 4 Colby St. Medford, MA 02155, USA
| | - Anne S Golding
- Department of Biomedical Engineering, Tufts University, 4 Colby St. Medford, MA 02155, USA
| | - Peter Tseng
- Department of Biomedical Engineering, Tufts University, 4 Colby St. Medford, MA 02155, USA
| | - Jeannine Coburn
- Department of Biomedical Engineering, Tufts University, 4 Colby St. Medford, MA 02155, USA
| | - Matthew B Applegate
- Department of Biomedical Engineering, Tufts University, 4 Colby St. Medford, MA 02155, USA
| | - Jodie E Moreau
- Department of Biomedical Engineering, Tufts University, 4 Colby St. Medford, MA 02155, USA
| | - Fiorenzo G Omenetto
- Department of Biomedical Engineering, Tufts University, 4 Colby St. Medford, MA 02155, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby St. Medford, MA 02155, USA.
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