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Krafft C. Modern trends in biophotonics for clinical diagnosis and therapy to solve unmet clinical needs. JOURNAL OF BIOPHOTONICS 2016; 9:1362-1375. [PMID: 27943650 DOI: 10.1002/jbio.201600290] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 11/16/2016] [Indexed: 06/06/2023]
Abstract
This contribution covers recent original research papers in the biophotonics field. The content is organized into main techniques such as multiphoton microscopy, Raman spectroscopy, infrared spectroscopy, optical coherence tomography and photoacoustic tomography, and their applications in the context of fluid, cell, tissue and skin diagnostics. Special attention is paid to vascular and blood flow diagnostics, photothermal and photodynamic therapy, tissue therapy, cell characterization, and biosensors for biomarker detection.
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Affiliation(s)
- Christoph Krafft
- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745, Jena, Germany
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Agnarsson B, Lundgren A, Gunnarsson A, Rabe M, Kunze A, Mapar M, Simonsson L, Bally M, Zhdanov VP, Höök F. Evanescent Light-Scattering Microscopy for Label-Free Interfacial Imaging: From Single Sub-100 nm Vesicles to Live Cells. ACS NANO 2015; 9:11849-11862. [PMID: 26517791 DOI: 10.1021/acsnano.5b04168] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Advancement in the understanding of biomolecular interactions has benefited greatly from the development of surface-sensitive bioanalytical sensors. To further increase their broad impact, significant efforts are presently being made to enable label-free and specific biomolecule detection with high sensitivity, allowing for quantitative interpretation and general applicability at low cost. In this work, we have addressed this challenge by developing a waveguide chip consisting of a flat silica core embedded in a symmetric organic cladding with a refractive index matching that of water. This is shown to reduce stray light (background) scattering and thereby allow for label-free detection of faint objects, such as individual sub-20 nm gold nanoparticles as well as sub-100 nm lipid vesicles. Measurements and theoretical analysis revealed that light-scattering signals originating from single surface-bound lipid vesicles enable characterization of their sizes without employing fluorescent lipids as labels. The concept is also demonstrated for label-free measurements of protein binding to and enzymatic (phospholipase A2) digestion of individual lipid vesicles, enabling an analysis of the influence on the measured kinetics of the dye-labeling of lipids required in previous assays. Further, diffraction-limited imaging of cells (platelets) binding to a silica surface showed that distinct subcellular features could be visualized and temporally resolved during attachment, activation, and spreading. Taken together, these results underscore the versatility and general applicability of the method, which due to its simplicity and compatibility with conventional microscopy setups may reach a widespread in life science and beyond.
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Affiliation(s)
- Björn Agnarsson
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Anders Lundgren
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Anders Gunnarsson
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Michael Rabe
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Angelika Kunze
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
- Institute of Physical Chemistry, University of Göttingen , D-37077 Göttingen, Germany
| | - Mokhtar Mapar
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Lisa Simonsson
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Marta Bally
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
| | - Vladimir P Zhdanov
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
- Boreskov Institute of Catalysis, Russian Academy of Sciences , Novosibirsk 630090, Russia
| | - Fredrik Höök
- Division of Biological Physics, Department of Applied Physics, Chalmers University of Technology , SE-41296 Göteborg, Sweden
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Kusić D, Kampe B, Ramoji A, Neugebauer U, Rösch P, Popp J. Raman spectroscopic differentiation of planktonic bacteria and biofilms. Anal Bioanal Chem 2015; 407:6803-13. [PMID: 26123442 DOI: 10.1007/s00216-015-8851-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 06/08/2015] [Accepted: 06/11/2015] [Indexed: 11/25/2022]
Abstract
Both biofilm formations as well as planktonic cells of water bacteria such as diverse species of the Legionella genus as well as Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli were examined in detail by Raman microspectroscopy. Production of various molecules involved in biofilm formation of tested species in nutrient-deficient media such as tap water was observed and was particularly evident in the biofilms formed by six Legionella species. Biofilms of selected species of the Legionella genus differ significantly from the planktonic cells of the same organisms in their lipid amount. Also, all Legionella species have formed biofilms that differ significantly from the biofilms of the other tested genera in the amount of lipids they produced. We believe that the significant increase in the synthesis of this molecular species may be associated with the ability of Legionella species to form biofilms. In addition, a combination of Raman microspectroscopy with chemometric approaches can distinguish between both planktonic form and biofilms of diverse bacteria and could be used to identify samples which were unknown to the identification model. Our results provide valuable data for the development of fast and reliable analytic methods based on Raman microspectroscopy, which can be applied to the analysis of tap water-adapted microorganisms without any cultivation step.
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Affiliation(s)
- Dragana Kusić
- Institut für Physikalische Chemie and Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Helmholtzweg 4, 07743, Jena, Germany
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