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Ortiz-Castillo JE, Gallo-Villanueva RC, Madou MJ, Perez-Gonzalez VH. Anisotropic gold nanoparticles: A survey of recent synthetic methodologies. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213489] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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2
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Collini M, Radaelli F, Sironi L, Ceffa NG, D’Alfonso L, Bouzin M, Chirico G. Adaptive optics microspectrometer for cross-correlation measurement of microfluidic flows. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-15. [PMID: 30816029 PMCID: PMC6987636 DOI: 10.1117/1.jbo.24.2.025004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 12/04/2018] [Indexed: 05/17/2023]
Abstract
Mapping flows in vivo is essential for the investigation of cardiovascular pathologies in animal models. The limitation of optical-based methods, such as space-time cross correlation, is the scattering of light by the connective and fat components and the direct wave front distortion by large inhomogeneities in the tissue. Nonlinear excitation of the sample fluorescence helps us by reducing light scattering in excitation. However, there is still a limitation on the signal-background due to the wave front distortion. We develop a diffractive optical microscope based on a single spatial light modulator (SLM) with no movable parts. We combine the correction of wave front distortions to the cross-correlation analysis of the flow dynamics. We use the SLM to shine arbitrary patterns of spots on the sample, to correct their optical aberrations, to shift the aberration corrected spot array on the sample for the collection of fluorescence images, and to measure flow velocities from the cross-correlation functions computed between couples of spots. The setup and the algorithms are tested on various microfluidic devices. By applying the adaptive optics correction algorithm, it is possible to increase up to 5 times the signal-to-background ratio and to reduce approximately of the same ratio the uncertainty of the flow speed measurement. By working on grids of spots, we can correct different aberrations in different portions of the field of view, a feature that allows for anisoplanatic aberrations correction. Finally, being more efficient in the excitation, we increase the accuracy of the speed measurement by employing a larger number of spots in the grid despite the fact that the two-photon excitation efficiency scales as the fourth power of this number: we achieve a twofold decrease of the uncertainty and a threefold increase of the accuracy in the evaluation of the flow speed.
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Affiliation(s)
- Maddalena Collini
- University of Milano-Bicocca, Department of Physics, Milan, Italy
- University of Milano-Bicocca, Nanomedicine Center, Milan, Italy
- Institute of Applied Sciences and Intelligent Systems, National Research Council of Italy, Pozzuoli, Italy
| | | | - Laura Sironi
- University of Milano-Bicocca, Department of Physics, Milan, Italy
| | - Nicolo G. Ceffa
- University of Milano-Bicocca, Department of Physics, Milan, Italy
| | - Laura D’Alfonso
- University of Milano-Bicocca, Department of Physics, Milan, Italy
| | - Margaux Bouzin
- University of Milano-Bicocca, Department of Physics, Milan, Italy
| | - Giuseppe Chirico
- University of Milano-Bicocca, Department of Physics, Milan, Italy
- University of Milano-Bicocca, Nanomedicine Center, Milan, Italy
- Institute of Applied Sciences and Intelligent Systems, National Research Council of Italy, Pozzuoli, Italy
- Address all correspondence to Giuseppe Chirico, E-mail:
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3
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Collini M, Bouzin M, Chirico G. Out of the Randomness: Correlating Noise in Biological Systems. Biophys J 2018; 114:2298-2307. [PMID: 29477335 PMCID: PMC6129560 DOI: 10.1016/j.bpj.2018.01.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 01/23/2018] [Accepted: 01/29/2018] [Indexed: 11/23/2022] Open
Abstract
The study of the dynamics of biological systems requires one to follow relaxation processes in time with micron-size spatial resolution. This need has led to the development of different fluorescence correlation techniques with high spatial resolution and a tremendous (from nanoseconds to seconds) temporal dynamic range. Spatiotemporal information can be obtained even on complex dynamic processes whose time evolution is not forecast by simple Brownian diffusion. Our discussion of the most recent applications of image correlation spectroscopy to the study of anomalous sub- or superdiffusion suggests that this field still requires the development of multidimensional image analyses based on analytical models or numerical simulations. We focus in particular on the framework of spatiotemporal image correlation spectroscopy and examine the critical steps in getting information on anomalous diffusive processes from the correlation maps. We point out how a dual space-time correlative analysis, in both the direct and the Fourier space, can provide quantitative information on superdiffusional processes when these are analyzed through an empirical model based on intermittent active dynamics. We believe that this dual space-time analysis, potentially amenable to mathematical treatment and to the exact fit of experimental data, could be extended to include the rich phenomenology of subdiffusive processes, thereby quantifying relevant parameters for the various motivating biological problems of interest.
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Affiliation(s)
- Maddalena Collini
- Dipartimento di Fisica e Centro di Nanomedicina, Università degli Studi di Milano-Bicocca, Milan, Italy; CNR-ISASI, Center for Complex Systems, Pozzuoli, Italy
| | - Margaux Bouzin
- Dipartimento di Fisica e Centro di Nanomedicina, Università degli Studi di Milano-Bicocca, Milan, Italy
| | - Giuseppe Chirico
- Dipartimento di Fisica e Centro di Nanomedicina, Università degli Studi di Milano-Bicocca, Milan, Italy; CNR-ISASI, Center for Complex Systems, Pozzuoli, Italy.
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4
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Pandžić E, Abu-Arish A, Whan RM, Hanrahan JW, Wiseman PW. Velocity landscape correlation resolves multiple flowing protein populations from fluorescence image time series. Methods 2018; 140-141:126-139. [DOI: 10.1016/j.ymeth.2018.02.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 12/06/2017] [Accepted: 02/12/2018] [Indexed: 11/16/2022] Open
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Ceffa NG, Cesana I, Collini M, D'Alfonso L, Carra S, Cotelli F, Sironi L, Chirico G. Spatiotemporal image correlation analysis of blood flow in branched vessel networks of zebrafish embryos. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-7. [PMID: 29030941 DOI: 10.1117/1.jbo.22.10.106008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/26/2017] [Indexed: 05/28/2023]
Abstract
Ramification of blood circulation is relevant in a number of physiological and pathological conditions. The oxygen exchange occurs largely in the capillary bed, and the cancer progression is closely linked to the angiogenesis around the tumor mass. Optical microscopy has made impressive improvements in in vivo imaging and dynamic studies based on correlation analysis of time stacks of images. Here, we develop and test advanced methods that allow mapping the flow fields in branched vessel networks at the resolution of 10 to 20 μm. The methods, based on the application of spatiotemporal image correlation spectroscopy and its extension to cross-correlation analysis, are applied here to the case of early stage embryos of zebrafish.
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Affiliation(s)
- Nicolo G Ceffa
- Università di Milano-Bicocca, Dipartimento di Fisica, Milano, Italy
| | - Ilaria Cesana
- Università di Milano-Bicocca, Dipartimento di Fisica, Milano, Italy
| | - Maddalena Collini
- Università di Milano-Bicocca, Dipartimento di Fisica, Milano, Italy
- Institute of Applied Sciences and Intelligent Systems, CNR-ISASI, Pozzuoli, Italy
- Università di Milano-Bicocca, Nanomedicine Center, Monza, Italy
| | - Laura D'Alfonso
- Università di Milano-Bicocca, Dipartimento di Fisica, Milano, Italy
| | | | | | - Laura Sironi
- Università di Milano-Bicocca, Dipartimento di Fisica, Milano, Italy
| | - Giuseppe Chirico
- Università di Milano-Bicocca, Dipartimento di Fisica, Milano, Italy
- Institute of Applied Sciences and Intelligent Systems, CNR-ISASI, Pozzuoli, Italy
- Università di Milano-Bicocca, Nanomedicine Center, Monza, Italy
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6
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Avvakumova S, Galbiati E, Sironi L, Locarno SA, Gambini L, Macchi C, Pandolfi L, Ruscica M, Magni P, Collini M, Colombo M, Corsi F, Chirico G, Romeo S, Prosperi D. Theranostic Nanocages for Imaging and Photothermal Therapy of Prostate Cancer Cells by Active Targeting of Neuropeptide-Y Receptor. Bioconjug Chem 2016; 27:2911-2922. [DOI: 10.1021/acs.bioconjchem.6b00568] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
| | | | | | - Silvia A. Locarno
- Università degli Studi di Milano, Dipartimento di
Scienze Farmaceutiche, via Mangiagalli 25, 20133, Milano, Italy
| | - Luca Gambini
- Università degli Studi di Milano, Dipartimento di
Scienze Farmaceutiche, via Mangiagalli 25, 20133, Milano, Italy
| | - Chiara Macchi
- Università degli Studi di Milano, Dipartimento di
Scienze Farmacologiche e Biomolecolari, via Balzaretti 9, 20133, Milano, Italy
| | | | - Massimiliano Ruscica
- Università degli Studi di Milano, Dipartimento di
Scienze Farmacologiche e Biomolecolari, via Balzaretti 9, 20133, Milano, Italy
| | - Paolo Magni
- Università degli Studi di Milano, Dipartimento di
Scienze Farmacologiche e Biomolecolari, via Balzaretti 9, 20133, Milano, Italy
| | | | | | - Fabio Corsi
- Surgery
Department, Breast Unit, ICS Maugeri S.p.A. SB, via S. Maugeri 10, 27100, Pavia, Italy
- Department
of Biomedical and Clinical Sciences L. Sacco, University of Milan, Via. G.B. Grassi 74, 20157, Milano, Italy
| | | | - Sergio Romeo
- Università degli Studi di Milano, Dipartimento di
Scienze Farmaceutiche, via Mangiagalli 25, 20133, Milano, Italy
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Digiacomo L, Digman MA, Gratton E, Caracciolo G. Development of an image Mean Square Displacement (iMSD)-based method as a novel approach to study the intracellular trafficking of nanoparticles. Acta Biomater 2016; 42:189-198. [PMID: 27449340 PMCID: PMC5483853 DOI: 10.1016/j.actbio.2016.07.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 07/01/2016] [Accepted: 07/15/2016] [Indexed: 12/15/2022]
Abstract
UNLABELLED Fluorescence microscopy and spectroscopy techniques are commonly used to investigate complex and interacting biological systems (e.g. proteins and nanoparticles in living cells), since these techniques can explore intracellular dynamics with high time resolution at the nanoscale. Here we extended one of the Image Correlation Spectroscopy (ICS) methods, i.e. the image Mean Square Displacement, in order to study 2-dimensional diffusive and flow motion in confined systems, whose driving speed is uniformly distributed in a variable angular range. Although these conditions are not deeply investigated in the current literature, they can be commonly found in the intracellular trafficking of nanocarriers, which diffuse in the cytoplasm and/or may move along the cytoskeleton in different directions. The proposed approach could reveal the underlying system's symmetry using methods derived from fluorescence correlation concepts and could recover dynamic and geometric features which are commonly done by single particle analyses. Furthermore, it improves the characterization of low-speed flow motions, when compared to SpatioTemporal Image Correlation Spectroscopy (STICS). Although we present a specific example (lipoplexes in living cells), the emphasis is in the discussion of the method, its basic assumptions and its validation on numeric simulations. STATEMENT OF SIGNIFICANCE Recent advances in nanoparticle-based drug and gene delivery systems have pointed out the interactions at cellular and subcellular levels as key-factors for the efficiency of the adopted biomaterials. Such biochemical and biophysical interactions drive and affect the intracellular dynamics, that is commonly characterized by means of fluorescence microscopy and spectroscopy techniques. Here we present a novel Image Correlation Spectroscopy (ICS) method as a promising tool to capture the intracellular behavior of nanoparticles with high resolution and low background's sensitivity. This study overcomes some of the approximations adopted so far, by decoupling the flow terms of the investigated dynamics and thus recovering ensemble's information from specific single particle behaviors. Finally, relevant implications for nanoparticle-based drug delivery are shown.
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Affiliation(s)
- Luca Digiacomo
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161 Rome, Italy; Department of Bioscience and Biotechnology, University of Camerino, Via Gentile III da Varano, 62032 Camerino, (MC), Italy
| | - Michelle A Digman
- Laboratory for Fluorescence Dynamics, Biomedical Engineering Department, University of California at Irvine, Irvine, CA 92697, USA
| | - Enrico Gratton
- Laboratory for Fluorescence Dynamics, Biomedical Engineering Department, University of California at Irvine, Irvine, CA 92697, USA
| | - Giulio Caracciolo
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161 Rome, Italy.
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Thiel F, Sokolov IM. Effective-medium approximation for lattice random walks with long-range jumps. Phys Rev E 2016; 94:012135. [PMID: 27575104 DOI: 10.1103/physreve.94.012135] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Indexed: 11/07/2022]
Abstract
We consider the random walk on a lattice with random transition rates and arbitrarily long-range jumps. We employ Bruggeman's effective-medium approximation (EMA) to find the disorder-averaged (coarse-grained) dynamics. The EMA procedure replaces the disordered system with a cleverly guessed reference system in a self-consistent manner. We give necessary conditions on the reference system and discuss possible physical mechanisms of anomalous diffusion. In the case of a power-law scaling between transition rates and distance, lattice variants of Lévy-flights emerge as the effective medium, and the problem is solved analytically, bearing the effective anomalous diffusivity. Finally, we discuss several example distributions and demonstrate very good agreement with numerical simulations.
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Affiliation(s)
- Felix Thiel
- Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, 12489 Berlin, Germany
| | - Igor M Sokolov
- Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, 12489 Berlin, Germany
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