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Kühl M, Nielsen DA, Borisov SM. In Vivo Lifetime Imaging of the Internal O 2 Dynamics in Corals with near-Infrared-Emitting Sensor Nanoparticles. ACS Sens 2024; 9:4671-4679. [PMID: 39179239 PMCID: PMC11443520 DOI: 10.1021/acssensors.4c01029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/26/2024]
Abstract
Mapping of O2 with luminescent sensors within intact animals is challenging due to attenuation of excitation and emission light caused by tissue absorption and scattering as well as interfering background fluorescence. Here we show the application of luminescent O2 sensor nanoparticles (∼50-70 nm) composed of the O2 indicator platinum(II) tetra(4-fluoro)phenyltetrabenzoporphyrin (PtTPTBPF) immobilized in poly(methyl methacrylate-co-methacrylic acid) (PMMA-MA). We injected the sensor nanoparticles into the gastrovascular system of intact colony fractions of reef-building tropical corals that harbor photosynthetic microalgae in their tissues. The sensor nanoparticles are excited by red LED light (617 nm) and emit in the near-infrared (780 nm), which enhances the transmission of excitation and emission light through biological materials. This enabled us to map the internal O2 concentration via time-domain luminescence lifetime imaging through the outer tissue layers across several coral polyps in flowing seawater. After injection, nanoparticles dispersed within the coral tissue for several hours. While luminescence intensity imaging showed some local aggregation of sensor particles, lifetime imaging showed a more homogeneous O2 distribution across a larger area of the coral colony. Local stimulation of symbiont photosynthesis in corals induced oxygenation of illuminated tissue areas and formation of lateral O2 gradients toward surrounding respiring tissues, which were dissipated rapidly after the onset of darkness. Such measurements are key to improving our understanding of how corals regulate their internal chemical microenvironment and metabolic activity, and how they are affected by environmental stress such as ocean warming, acidification, and deoxygenation. Our experimental approach can also be adapted for in vivo O2 imaging in other natural systems such as biofilms, plant and animal tissues, as well as in organoids and other cell constructs, where imaging internal O2 conditions are relevant and challenging due to high optical density and background fluorescence.
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Affiliation(s)
- Michael Kühl
- Marine Biological Section, Department of Biology, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark
- Climate Change Cluster, University of Technology Sydney, Broadway 2007, Australia
| | | | - Sergey M Borisov
- Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
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2
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Seručnik M, Dogsa I, Zadravec LJ, Mandic-Mulec I, Žnidaršič-Plazl P. Development of a Microbioreactor for Bacillus subtilis Biofilm Cultivation. MICROMACHINES 2024; 15:1037. [PMID: 39203688 PMCID: PMC11356062 DOI: 10.3390/mi15081037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 08/08/2024] [Accepted: 08/09/2024] [Indexed: 09/03/2024]
Abstract
To improve our understanding of Bacillus subtilis growth and biofilm formation under different environmental conditions, two versions of a microfluidic reactor with two channels separated by a polydimethylsiloxane (PDMS) membrane were developed. The gas phase was introduced into the channel above the membrane, and oxygen transfer from the gas phase through the membrane was assessed by measuring the dissolved oxygen concentration in the liquid phase using a miniaturized optical sensor and oxygen-sensitive nanoparticles. B. subtilis biofilm formation was monitored in the growth channels of the microbioreactors, which were designed in two shapes: one with circular extensions and one without. The volumes of these microbioreactors were (17 ± 4) μL for the reactors without extensions and (28 ± 4) μL for those with extensions. The effect of microbioreactor geometry and aeration on B. subtilis biofilm growth was evaluated by digital image analysis. In both microbioreactor geometries, stable B. subtilis biofilm formation was achieved after 72 h of incubation at a growth medium flow rate of 1 μL/min. The amount of oxygen significantly influenced biofilm formation. When the culture was cultivated with a continuous air supply, biofilm surface coverage and biomass concentration were higher than in cultivations without aeration or with a 100% oxygen supply. The channel geometry with circular extensions did not lead to a higher total biomass in the microbioreactor compared to the geometry without extensions.
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Affiliation(s)
- Mojca Seručnik
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia; (M.S.); (L.J.Z.)
| | - Iztok Dogsa
- Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia; (I.D.); (I.M.-M.)
| | - Lan Julij Zadravec
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia; (M.S.); (L.J.Z.)
| | - Ines Mandic-Mulec
- Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia; (I.D.); (I.M.-M.)
- Chair of Micro Process Engineering and Technology—COMPETE, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Polona Žnidaršič-Plazl
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia; (M.S.); (L.J.Z.)
- Chair of Micro Process Engineering and Technology—COMPETE, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
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Gunenthiran S, Law CS, Wang J, Lim SY, Abell AD, Alwahabi ZT, Santos A. Engineering of Solid-State Nanoporous Laser through Dendrimer-Encapsulated Fluorophores. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38498400 DOI: 10.1021/acsami.4c00791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Dendrimers─nanosized macromolecules that can function as hosts for encapsulation of guest molecules─provide new avenues to engineer gain media for lasing systems. In this context, this study investigates the interplay between the geometric features of a model porous scattering medium, nanoporous anodic alumina (NAA), and the chemical features of a model fluorophore-dendrimer encapsulation system to maximize random lasing. The inner surface of the NAA platforms is functionalized with fluorophore molecules encapsulated within dendrimers via an electrostatic interaction. The resulting solid-state composite structures emit well-resolved, intense random lasing when subjected to optical pumping. By engineering fluorophore-dendrimer and geometric features of scattering medium, we can precisely tune the characteristics of random lasing emissions. It is found that lasing structures with low porosity and thickness functionalized with fluorophore molecules encapsulated in second-generation dendrimers provide the best platforms for lasing generation, resulting in a strongly polarized laser at ∼594 nm that has a high quality-gain product of ∼1588 au, a polarization quality of ∼0.86, and a lasing threshold of ∼0.05 mJ pulse-1. Comparative analysis indicates that dendrimers achieve 2.5 times better random lasing than conventional surfactants due to improved encapsulation and minimization of photobleaching. Our results reveal the importance of the fluorophore encapsulation method and design of scattering media in the engineering of random lasing platforms for applications in optical and optoelectrical systems.
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Affiliation(s)
- Satyathiran Gunenthiran
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Cheryl Suwen Law
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Juan Wang
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Siew Yee Lim
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Andrew D Abell
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Department of Chemistry, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Zeyad T Alwahabi
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Abel Santos
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
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Steinegger A, Wolfbeis OS, Borisov SM. Optical Sensing and Imaging of pH Values: Spectroscopies, Materials, and Applications. Chem Rev 2020; 120:12357-12489. [PMID: 33147405 PMCID: PMC7705895 DOI: 10.1021/acs.chemrev.0c00451] [Citation(s) in RCA: 182] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Indexed: 12/13/2022]
Abstract
This is the first comprehensive review on methods and materials for use in optical sensing of pH values and on applications of such sensors. The Review starts with an introduction that contains subsections on the definition of the pH value, a brief look back on optical methods for sensing of pH, on the effects of ionic strength on pH values and pKa values, on the selectivity, sensitivity, precision, dynamic ranges, and temperature dependence of such sensors. Commonly used optical sensing schemes are covered in a next main chapter, with subsections on methods based on absorptiometry, reflectometry, luminescence, refractive index, surface plasmon resonance, photonic crystals, turbidity, mechanical displacement, interferometry, and solvatochromism. This is followed by sections on absorptiometric and luminescent molecular probes for use pH in sensors. Further large sections cover polymeric hosts and supports, and methods for immobilization of indicator dyes. Further and more specific sections summarize the state of the art in materials with dual functionality (indicator and host), nanomaterials, sensors based on upconversion and 2-photon absorption, multiparameter sensors, imaging, and sensors for extreme pH values. A chapter on the many sensing formats has subsections on planar, fiber optic, evanescent wave, refractive index, surface plasmon resonance and holography based sensor designs, and on distributed sensing. Another section summarizes selected applications in areas, such as medicine, biology, oceanography, bioprocess monitoring, corrosion studies, on the use of pH sensors as transducers in biosensors and chemical sensors, and their integration into flow-injection analyzers, microfluidic devices, and lab-on-a-chip systems. An extra section is devoted to current challenges, with subsections on challenges of general nature and those of specific nature. A concluding section gives an outlook on potential future trends and perspectives.
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Affiliation(s)
- Andreas Steinegger
- Institute
of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Otto S. Wolfbeis
- Institute
of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, D-93040 Regensburg, Germany
| | - Sergey M. Borisov
- Institute
of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
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Bolivar JM, Nidetzky B. The Microenvironment in Immobilized Enzymes: Methods of Characterization and Its Role in Determining Enzyme Performance. Molecules 2019; 24:molecules24193460. [PMID: 31554193 PMCID: PMC6803829 DOI: 10.3390/molecules24193460] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/17/2019] [Accepted: 09/19/2019] [Indexed: 12/11/2022] Open
Abstract
The liquid milieu in which enzymes operate when they are immobilized in solid materials can be quite different from the milieu in bulk solution. Important differences are in the substrate and product concentration but also in pH and ionic strength. The internal milieu for immobilized enzymes is affected by the chemical properties of the solid material and by the interplay of reaction and diffusion. Enzyme performance is influenced by the internal milieu in terms of catalytic rate (“activity”) and stability. Elucidation, through direct measurement of differences in the internal as compared to the bulk milieu is, therefore, fundamentally important in the mechanistic characterization of immobilized enzymes. The deepened understanding thus acquired is critical for the rational development of immobilized enzyme preparations with optimized properties. Herein we review approaches by opto-chemical sensing to determine the internal milieu of enzymes immobilized in porous particles. We describe analytical principles applied to immobilized enzymes and focus on the determination of pH and the O2 concentration. We show measurements of pH and [O2] with spatiotemporal resolution, using in operando analysis for immobilized preparations of industrially important enzymes. The effect of concentration gradients between solid particle and liquid bulk on enzyme performance is made evident and quantified. Besides its use in enzyme characterization, the method can be applied to the development of process control strategies.
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Affiliation(s)
- Juan M Bolivar
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Petersgasse 12, A-8010 Graz, Austria.
- Chemical and Materials Engineering Department, Complutense University of Madrid, 28040 Madrid, Spain.
| | - Bernd Nidetzky
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Petersgasse 12, A-8010 Graz, Austria.
- Austrian Centre of Industrial Biotechnology (acib), Petersgasse 14, A-8010 Graz, Austria.
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6
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Moßhammer M, Brodersen KE, Kühl M, Koren K. Nanoparticle- and microparticle-based luminescence imaging of chemical species and temperature in aquatic systems: a review. Mikrochim Acta 2019; 186:126. [PMID: 30680465 DOI: 10.1007/s00604-018-3202-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 12/20/2018] [Indexed: 11/25/2022]
Abstract
Most aquatic systems rely on a multitude of biogeochemical processes that are coupled with each other in a complex and dynamic manner. To understand such processes, minimally invasive analytical tools are required that allow continuous, real-time measurements of individual reactions in these complex systems. Optical chemical sensors can be used in the form of fiber-optic sensors, planar sensors, or as micro- and nanoparticles (MPs and NPs). All have their specific merits, but only the latter allow for visualization and quantification of chemical gradients over 3D structures. This review (with 147 references) summarizes recent developments mainly in the field of optical NP sensors relevant for chemical imaging in aquatic science. The review encompasses methods for signal read-out and imaging, preparation of NPs and MPs, and an overview of relevant MP/NP-based sensors. Additionally, examples of MP/NP-based sensors in aquatic systems such as corals, plant tissue, biofilms, sediments and water-sediment interfaces, marine snow and in 3D bioprinting are given. We also address current challenges and future perspectives of NP-based sensing in aquatic systems in a concluding section. Graphical abstract ᅟ.
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Affiliation(s)
- Maria Moßhammer
- Marine Biological Section, Department of Biology, University of Copenhagen, 3000, Helsingør, Denmark
| | - Kasper Elgetti Brodersen
- Marine Biological Section, Department of Biology, University of Copenhagen, 3000, Helsingør, Denmark
| | - Michael Kühl
- Marine Biological Section, Department of Biology, University of Copenhagen, 3000, Helsingør, Denmark.
- Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, 2007, Australia.
| | - Klaus Koren
- Aarhus University Center for Water Technology, Department of Bioscience - Microbiology, Aarhus University, 8000, Aarhus, Denmark.
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7
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Kailasa SK, Koduru JR, Desai ML, Park TJ, Singhal RK, Basu H. Recent progress on surface chemistry of plasmonic metal nanoparticles for colorimetric assay of drugs in pharmaceutical and biological samples. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.05.004] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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8
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Galyean AA, Behr MR, Cash KJ. Ionophore-based optical nanosensors incorporating hydrophobic carbon dots and a pH-sensitive quencher dye for sodium detection. Analyst 2017; 143:458-465. [PMID: 29226289 DOI: 10.1039/c7an01382e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nanosensors present a biological monitoring method that is biocompatible, reversible, and nano-scale, and they offer many advantages over traditional organic indicators. Typical ionophore-based nanosensors incorporate nile-blue derivative pH indicators but suffer from photobleaching while quantum dot alternatives pose a potential toxicity risk. In order to address this challenge, sodium selective nanosensors containing carbon dots and a pH-sensitive quencher molecule were developed based on an ion-exchange theory and a decoupled recognition element from the pH indicator. Carbon dots were synthesized and integrated into nanosensors containing a pH-indicator, an analyte-binding ligand (ionophore), and a charge-balancing additive. These nanosensors are ion-selective against potassium (selectivity coefficient of 0.4) and lithium (selectivity coefficient of 0.9). Reversible nanosensor response to sodium is also demonstrated. The carbon dot nanosensors are resistant to changes in optical properties for at least 12 h and display stable selectivity to physiologically-relevant sodium (alpha = 0.5 of 200 mM NaCl) for a minimum of 6 days.
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Affiliation(s)
- A A Galyean
- Department of Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado 80401, USA.
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9
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Müller BJ, Rappitsch T, Staudinger C, Rüschitz C, Borisov SM, Klimant I. Sodium-Selective Fluoroionophore-Based Optodes for Seawater Salinity Measurement. Anal Chem 2017; 89:7195-7202. [PMID: 28585806 DOI: 10.1021/acs.analchem.7b01373] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A new fluorescent sensor for Na+ is presented. The sensor relies on a Na+ selective fluoroionophore based on a bright red-emitting BODIPY chromophore. The fluorescence of the fluoroionophore is enhanced upon binding of Na+-ions to the highly selective aza-crown ether receptor due to reduction of the photoinduced electron transfer (PET) quenching. Solid state sensing materials were prepared by physically embedding the fluoroionophore into water-swellable biocompatible polymer matrices (polyurethane hydrogels), thus enabling continuous measurements of aqueous samples. Despite the simple design, the sensor showed no leaching of the indicator and featured fast and reversible response. Among different polyurethane hydrogels investigated, the hydrogel D1 featuring the highest water uptake was found to be the most suitable due to the highest dynamics between "off" and "on" states. Due to little or no cross sensitivity to other ions (e.g., Mg2+, Ca2+, K+) and its insensitivity to potential changes in pH, this sensor is promising for use in clinical diagnostics and for biological and marine applications. Fiber-optic sensors based on referenced read-out with a compact phase fluorimeter were prepared. To demonstrate their practical applicability, the sensors were used to determine the salinity in the seawater and brackish water of the Baltic Sea.
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Affiliation(s)
- Bernhard J Müller
- Graz University of Technology , Institute of Analytical Chemistry and Food Chemistry, Stremayrgasse 9, 8010 Graz, Austria
| | - Tanja Rappitsch
- Graz University of Technology , Institute of Analytical Chemistry and Food Chemistry, Stremayrgasse 9, 8010 Graz, Austria
| | - Christoph Staudinger
- Graz University of Technology , Institute of Analytical Chemistry and Food Chemistry, Stremayrgasse 9, 8010 Graz, Austria
| | - Christian Rüschitz
- Graz University of Technology , Institute of Analytical Chemistry and Food Chemistry, Stremayrgasse 9, 8010 Graz, Austria
| | - Sergey M Borisov
- Graz University of Technology , Institute of Analytical Chemistry and Food Chemistry, Stremayrgasse 9, 8010 Graz, Austria
| | - Ingo Klimant
- Graz University of Technology , Institute of Analytical Chemistry and Food Chemistry, Stremayrgasse 9, 8010 Graz, Austria
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Sivaraman A, Sanchez-Salas R, Prapotnich D, Barret E, Mombet A, Cathala N, Rozet F, Galiano M, Cathelineau X. Robotics in urological surgery: evolution, current status and future perspectives. Actas Urol Esp 2015; 39:435-41. [PMID: 25801676 DOI: 10.1016/j.acuro.2014.10.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 10/04/2014] [Accepted: 10/07/2014] [Indexed: 11/29/2022]
Abstract
CONTEXT Robotic surgery is rapidly evolving and has become an essential part of surgical practice in several parts of the world. Robotic technology will expand globally and most of the surgeons around the world will have access to surgical robots in the future. It is essential that we are updated about the outcomes of robot assisted surgeries which will allow everyone to develop an unbiased opinion on the clinical utility of this innovation. OBJECTIVE In this review we aim to present the evolution, objective evaluation of clinical outcomes and future perspectives of robot assisted urologic surgeries. ACQUISITION OF EVIDENCE A systematic literature review of clinical outcomes of robotic urological surgeries was made in the PUBMED. Randomized control trials, cohort studies and review articles were included. Moreover, a detailed search in the web based search engine was made to acquire information on evolution and evolving technologies in robotics. SYNTHESIS OF EVIDENCE The present evidence suggests that the clinical outcomes of the robot assisted urologic surgeries are comparable to the conventional open surgical and laparoscopic results and are associated with fewer complications. However, long term results are not available for all the common robotic urologic surgeries. There are plenty of novel developments in robotics to be available for clinical use in the future. CONCLUSION Robotic urologic surgery will continue to evolve in the future. We should continue to critically analyze whether the advances in technology and the higher cost eventually translates to improved overall surgical performance and outcomes.
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Affiliation(s)
- A Sivaraman
- Department of Urology, Institute Mutualiste Montsouris, París, Francia
| | - R Sanchez-Salas
- Department of Urology, Institute Mutualiste Montsouris, París, Francia.
| | - D Prapotnich
- Department of Urology, Institute Mutualiste Montsouris, París, Francia
| | - E Barret
- Department of Urology, Institute Mutualiste Montsouris, París, Francia
| | - A Mombet
- Department of Urology, Institute Mutualiste Montsouris, París, Francia
| | - N Cathala
- Department of Urology, Institute Mutualiste Montsouris, París, Francia
| | - F Rozet
- Department of Urology, Institute Mutualiste Montsouris, París, Francia
| | - M Galiano
- Department of Urology, Institute Mutualiste Montsouris, París, Francia
| | - X Cathelineau
- Department of Urology, Institute Mutualiste Montsouris, París, Francia
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11
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Dmitriev RI, Borisov SM, Düssmann H, Sun S, Müller BJ, Prehn J, Baklaushev VP, Klimant I, Papkovsky DB. Versatile Conjugated Polymer Nanoparticles for High-Resolution O2 Imaging in Cells and 3D Tissue Models. ACS NANO 2015; 9:5275-88. [PMID: 25858428 DOI: 10.1021/acsnano.5b00771] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
High brightness, chemical and photostability, tunable characteristics, and spectral and surface properties are important attributes for nanoparticle probes designed for live cell imaging. We describe a class of nanoparticles for high-resolution imaging of O2 that consists of a substituted conjugated polymer (polyfluorene or poly(fluorene-alt-benzothiadiazole)) acting as a FRET antenna and a fluorescent reference with covalently bound phosphorescent metalloporphyrin (PtTFPP, PtTPTBPF). The nanoparticles prepared from such copolymers by precipitation method display stability, enhanced (>5-10 times) brightness under one- and two-photon excitation, compatibility with ratiometric and lifetime-based imaging modes, and low toxicity for cells. Their cell-staining properties can be modulated with positively and negatively charged groups grafted to the backbone. The "zwitter-ionic" nanoparticles show high cell-staining efficiency, while their cell entry mechanisms differ for the different 3D models. When injected in the bloodstream, the cationic and anionic nanoparticles show similar distribution in vivo. These features and tunable properties make the conjugated polymer based phosphorescent nanoparticles a versatile tool for quantitative O2 imaging with a broad range of cell and 3D tissue models.
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Affiliation(s)
- Ruslan I Dmitriev
- †School of Biochemistry and Cell Biology, University College Cork, Cork, Ireland
| | - Sergey M Borisov
- ‡Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Graz 8010, Austria
| | - Heiko Düssmann
- §Department of Physiology and Medical Physics, Centre for the Study of Neurological Disorders, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - Shiwen Sun
- ‡Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Graz 8010, Austria
| | - Bernhard J Müller
- ‡Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Graz 8010, Austria
| | - Jochen Prehn
- §Department of Physiology and Medical Physics, Centre for the Study of Neurological Disorders, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - Vladimir P Baklaushev
- ∥Department of Medicinal Nanobiotechnology, Pirogov Russian State Medical University, Moscow 115682, Russia
- ⊥Federal Research Clinical Centre of Federal Medical and Biological Agency of Russia, Moscow, Russia
| | - Ingo Klimant
- ‡Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Graz 8010, Austria
| | - Dmitri B Papkovsky
- †School of Biochemistry and Cell Biology, University College Cork, Cork, Ireland
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12
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Sun S, Ungerböck B, Mayr T. Imaging of oxygen in microreactors and microfluidic systems. Methods Appl Fluoresc 2015; 3:034002. [DOI: 10.1088/2050-6120/3/3/034002] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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13
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Soršak E, Valh JV, Urek ŠK, Lobnik A. Application of PAMAM dendrimers in optical sensing. Analyst 2015; 140:976-89. [DOI: 10.1039/c4an00825a] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this review, recent advances have been reported in those PAMAM dendrimer-based optical sensors that are used for the detection of pH, cations, and other analyte.
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Affiliation(s)
- E. Soršak
- University of Maribor
- Faculty of Mechanical Engineering
- Laboratory for Chemistry and Environmental Protection
- 2000 Maribor
- Slovenia
| | - J. Volmajer Valh
- University of Maribor
- Faculty of Mechanical Engineering
- Laboratory for Chemistry and Environmental Protection
- 2000 Maribor
- Slovenia
| | - Š. Korent Urek
- Institute for Environmental Protection and Sensors
- 2000 Maribor
- Slovenia
| | - A. Lobnik
- University of Maribor
- Faculty of Mechanical Engineering
- Laboratory for Chemistry and Environmental Protection
- 2000 Maribor
- Slovenia
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14
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15
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Aigner D, Dmitriev RI, Borisov SM, Papkovsky DB, Klimant I. pH-sensitive perylene bisimide probes for live cell fluorescence lifetime imaging. J Mater Chem B 2014; 2:6792-6801. [DOI: 10.1039/c4tb01006j] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Several new perylene bisimide (PBI) probes comprising oligo-guanidine conjugates and cationic hydrogel nanoparticle structures were designed for sensing intracellular pH in live cell fluorescence lifetime imaging microscopy (FLIM).
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Affiliation(s)
- D. Aigner
- Institute of Analytical Chemistry and Food Chemistry
- Graz University of Technology
- Graz, Austria
| | - R. I. Dmitriev
- School of Biochemistry and Cell Biology
- University College Cork
- Cork, Ireland
| | - S. M. Borisov
- Institute of Analytical Chemistry and Food Chemistry
- Graz University of Technology
- Graz, Austria
| | - D. B. Papkovsky
- School of Biochemistry and Cell Biology
- University College Cork
- Cork, Ireland
| | - I. Klimant
- Institute of Analytical Chemistry and Food Chemistry
- Graz University of Technology
- Graz, Austria
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Korzeniowska B, Nooney R, Wencel D, McDonagh C. Silica nanoparticles for cell imaging and intracellular sensing. NANOTECHNOLOGY 2013; 24:442002. [PMID: 24113689 DOI: 10.1088/0957-4484/24/44/442002] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
There is increasing interest in the use of nanoparticles (NPs) for biomedical applications. In particular, nanobiophotonic approaches using fluorescence offers the potential of high sensitivity and selectivity in applications such as cell imaging and intracellular sensing. In this review, we focus primarily on the use of fluorescent silica NPs for these applications and, in so doing, aim to enhance and complement the key recent review articles on these topics. We summarize the main synthetic approaches, namely the Stöber and microemulsion processes, and, in this context, we deal with issues in relation to both covalent and physical incorporation of different types of dyes in the particles. The important issue of NP functionalization for conjugation to biomolecules is discussed and strategies published in the recent literature are highlighted and evaluated. We cite recent examples of the use of fluorescent silica NPs for cell imaging in the areas of cancer, stem cell and infectious disease research, and we review the current literature on the use of silica NPs for intracellular sensing of oxygen, pH and ionic species. We include a short final section which seeks to identify the main challenges and obstacles in relation to the potential widespread use of these particles for in vivo diagnostics and therapeutics.
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Affiliation(s)
- B Korzeniowska
- Optical Sensors Laboratory, School of Physical Sciences, NCSR, Dublin City University, Dublin 9, Ireland
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17
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Chen HQ, Wu Y, Zhang YY, Guan YY, Wang L. Determination of chromium(III) in aqueous solution using CePO4:Tb3+nanocrystals in a fluorescence resonance energy transfer system. LUMINESCENCE 2013; 29:642-8. [DOI: 10.1002/bio.2599] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 09/08/2013] [Accepted: 09/09/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Hong-Qi Chen
- Anhui Key Laboratory of Chemo-Biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science; Anhui Normal University; Wuhu 241000 People's Republic of China
| | - Yong Wu
- Anhui Key Laboratory of Chemo-Biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science; Anhui Normal University; Wuhu 241000 People's Republic of China
| | - Yi-Yan Zhang
- Anhui Key Laboratory of Chemo-Biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science; Anhui Normal University; Wuhu 241000 People's Republic of China
| | - Ying-Ying Guan
- Anhui Key Laboratory of Chemo-Biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science; Anhui Normal University; Wuhu 241000 People's Republic of China
| | - Lun Wang
- Anhui Key Laboratory of Chemo-Biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science; Anhui Normal University; Wuhu 241000 People's Republic of China
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18
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Topal SZ, Önal E, Ertekin K, Oter O, Gürek AG, Hirel C. Significant sensitivity and stability enhancement of tetraphenylporphyrin-based optical oxygen sensing material in presence of perfluorochemicals. J PORPHYR PHTHALOCYA 2013. [DOI: 10.1142/s1088424613500193] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Emission-based oxygen sensing properties of highly luminescent tetraphenylporphyrin molecules were investigated in polystyrene, ethyl cellulose, poly(1-trimethylsilyl-1-propyne) and poly(isobutylmethacrylate) matrices. The effect of perfluorochemicals (PFCs) on oxygen sensitivity and stability of the sensor materials was also examined. Fluorescence intensity and lifetime measurements of meso-tetraphenylporphyrinato Zn ( II ) (ZnTPP) and meso-tetraphenylporphyrin (H2TPP) materials were performed in the concentration range of 0–100% pO 2. The fluorescence intensity variation of H2TPPvs. oxygen was 86%. H2TPP-based composite also yielded higher Stern–Volmer constant, faster response and regeneration time, excellent long term photostability and larger linear response range with respect to ZnTPP. The detection limit of oxygen for H2TPP was less than 0.5%. When stored in sealed bags protected from sunlight, no decrease in oxygen sensitivity was observed during approximately five months. As far as we know, the gathered utilization of PFCs and H2TPP embedded in polymer matrices was not previously described in literature, and has present amelioration compared to materials already existing.
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Affiliation(s)
- Sevinc Z. Topal
- Gebze Institute of Technology, Department of Chemistry, P.O.Box 141, 41400 Gebze, Kocaeli, Turkey
| | - Emel Önal
- Gebze Institute of Technology, Department of Chemistry, P.O.Box 141, 41400 Gebze, Kocaeli, Turkey
| | - Kadriye Ertekin
- University of Dokuz Eylul, Faculty of Arts and Sciences, Department of Chemistry, 35160 Buca, Izmir, Turkey
| | - Ozlem Oter
- University of Dokuz Eylul, Faculty of Arts and Sciences, Department of Chemistry, 35160 Buca, Izmir, Turkey
| | - Ayşe G. Gürek
- Gebze Institute of Technology, Department of Chemistry, P.O.Box 141, 41400 Gebze, Kocaeli, Turkey
| | - Catherine Hirel
- Gebze Institute of Technology, Department of Chemistry, P.O.Box 141, 41400 Gebze, Kocaeli, Turkey
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Marín-Suárez M, Arias-Martos MC, Galeano-Díaz T, Fernández-Sánchez JF, Fernández-Gutiérrez A. Modelling the size and polydispersity of magnetic hybrid nanoparticles for luminescent sensing of oxygen. Mikrochim Acta 2013. [DOI: 10.1007/s00604-013-1054-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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20
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21
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Bolivar JM, Consolati T, Mayr T, Nidetzky B. Shine a light on immobilized enzymes: real-time sensing in solid supported biocatalysts. Trends Biotechnol 2013; 31:194-203. [PMID: 23384504 DOI: 10.1016/j.tibtech.2013.01.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/06/2013] [Accepted: 01/07/2013] [Indexed: 01/01/2023]
Abstract
Enzyme immobilization on solid supports has been key to biotransformation development. Although technologies for immobilization have largely reached maturity, the resulting biocatalysts are not well understood mechanistically. One limitation is that their internal environment is usually inferred from external data. Therefore, biological consequences of the immobilization remain masked by physical effects of mass transfer, obstructing further development. Work reviewed herein shows that opto-chemical sensing performed directly within the solid support enables the biocatalyst's internal environment to be uncovered quantitatively and in real time. Non-invasive methods of intraparticle pH and O2 determination are presented, and their use as process analytical tools for development of heterogeneous biocatalysts is described. Method diversification to other analytes remains a challenging task for the future.
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Affiliation(s)
- Juan M Bolivar
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, Petersgasse 12, A-8010 Graz, Austria
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22
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Biosensor for on-line fluorescent detection of trifluoroperazine based on genetically modified calmodulin. Anal Bioanal Chem 2012; 402:3211-8. [PMID: 22331049 DOI: 10.1007/s00216-011-5701-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 12/27/2011] [Accepted: 12/29/2011] [Indexed: 10/28/2022]
Abstract
This paper describes the development of a novel on-line biosensor based on a fluorescently labeled human calmodulin (CaM), hCaM M124C-mBBr, immobilized on controlled-pore glass (CPG), for the analysis of trifluoroperazine (TFP); a phenothiazine drug in human urine samples. The device was automated by packing hCaM M124C-mBBr-CPG in a continuous-flow microcell connected to a monitoring system, composed of a bifurcated optical fiber coupled to a spectrofluorometer. Operating parameters of the on-line biosensor (flow rate, sample injection volume, and carrier solution and buffer pH) were studied and optimized. Under the optimal conditions, the biosensor provides a detection and a quantification limit of 0.24 and 0.52 μg mL(-1), respectively, and a dynamic range from 0.52 to 61.05 μg mL(-1) TFP (n = 5, correlation coefficient 0.998). The response time (t(100)) was shorter than 42 s (recovery time <4.5 min) and reproducibility and repeatability of the TFP measurements, within the linear response range, were lower than 1.4 and 2.7%, respectively. The device was successfully applied to the analysis of TFP in spiked human urine samples with recoveries ranging between 97 and 101% and with RSDs lower than 5.9%.
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Schäferling M. The Art of Fluorescence Imaging with Chemical Sensors. Angew Chem Int Ed Engl 2012; 51:3532-54. [PMID: 22422626 DOI: 10.1002/anie.201105459] [Citation(s) in RCA: 544] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 10/12/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Michael Schäferling
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93040 Regensburg, Germany.
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25
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Gómez-de Pedro S, Puyol M, Izquierdo D, Salinas I, de la Fuente JM, Alonso-Chamarro J. A ceramic microreactor for the synthesis of water soluble CdS and CdS/ZnS nanocrystals with on-line optical characterization. NANOSCALE 2012; 4:1328-1335. [PMID: 22262053 DOI: 10.1039/c2nr11525e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this paper, a computer controlled microreactor to synthesize water soluble CdS and CdS/ZnS nanocrystals with in situ monitoring of the reaction progress is developed. It is based on ceramic tapes and the Low-Temperature Co-fired Ceramics technology (LTCC). As well the microsystem set-up, the microreactor fluidic design has also been thoroughly optimized. The final device is based on a hydrodynamic focusing of the reagents followed by a three-dimensional micromixer. This generates monodispersed and stable CdS and core-shell CdS/ZnS nanocrystals of 4.5 and 4.2 nm, respectively, with reproducible optical properties in terms of fluorescence emission wavelengths, bandwidth, and quantum yields, which is a key requirement for their future analytical applications. The synthetic process is also controlled in real time with the integration of an optical detection system for absorbance and fluorescence measurements based on commercial miniaturized optical components. This makes possible the efficient managing of the hydrodynamic variables to obtain the desired colloidal suspension. As a result, a simple, economic, robust and portable microsystem for the well controlled synthesis of CdS and CdS/ZnS nanocrystals is presented. Moreover, the reaction takes place in aqueous medium, thus allowing the direct modular integration of this microreactor in specific analytical microsystems, which require the use of such quantum dots as labels.
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Affiliation(s)
- Sara Gómez-de Pedro
- Grup de Sensors i Biosensors, Departament de Química, Univ. Autonoma Barcelona, Edifici Cn, 08193, Bellaterra, Catalonia, Spain
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Rurack K, Spieles M. Fluorescence quantum yields of a series of red and near-infrared dyes emitting at 600-1000 nm. Anal Chem 2011; 83:1232-42. [PMID: 21250654 DOI: 10.1021/ac101329h] [Citation(s) in RCA: 401] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The determination of the fluorescence quantum yields (QY, Φ(f)) of a series of fluorescent dyes that span the absorption/excitation and emission ranges of 520-900 and 600-1000 nm is reported. The dyes encompass commercially available rhodamine 101 (Rh-101, Φ(f) = 0.913), cresyl violet (0.578), oxazine 170 (0.579), oxazine 1 (0.141), cryptocyanine (0.012), HITCI (0.283), IR-125 (0.132), IR-140 (0.167), and four noncommercial cyanine dyes with specific spectroscopic features, all of them in dilute ethanol solution. The QYs have been measured relative to the National Institute of Standards and Technology's standard reference material (SRM) 936a (quinine sulfate, QS) on a traceably characterized fluorometer, employing a chain of transfer standard dyes that include coumarin 102 (Φ(f) = 0.764), coumarin 153 (0.544), and DCM (0.435) as links between QS and Rh-101. The QY of Rh-101 has also been verified in direct measurements against QS using two approaches that rely only on instrument correction. In addition, the effects of temperature and the presence of oxygen on the fluorescence quantum yield of Rh-101 have been assessed.
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Affiliation(s)
- Knut Rurack
- Division 1.5 Bioanalytics, BAM Bundesanstalt für Materialforschung und -prüfung, Berlin, Germany.
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27
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Borchert NB, Ponomarev GV, Kerry JP, Papkovsky DB. O2/pH Multisensor Based on One Phosphorescent Dye. Anal Chem 2010; 83:18-22. [DOI: 10.1021/ac1025754] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Nicolas B. Borchert
- Department of Food Science and Technology, University College Cork, College Road, Cork, Ireland, Institute of Biomedical Chemistry, Moscow, Russia, and Biochemistry Department, University College Cork, Cavanagh Pharmacy Building, College Road, Ireland
| | - Gelii V. Ponomarev
- Department of Food Science and Technology, University College Cork, College Road, Cork, Ireland, Institute of Biomedical Chemistry, Moscow, Russia, and Biochemistry Department, University College Cork, Cavanagh Pharmacy Building, College Road, Ireland
| | - Joe P. Kerry
- Department of Food Science and Technology, University College Cork, College Road, Cork, Ireland, Institute of Biomedical Chemistry, Moscow, Russia, and Biochemistry Department, University College Cork, Cavanagh Pharmacy Building, College Road, Ireland
| | - Dmitri B. Papkovsky
- Department of Food Science and Technology, University College Cork, College Road, Cork, Ireland, Institute of Biomedical Chemistry, Moscow, Russia, and Biochemistry Department, University College Cork, Cavanagh Pharmacy Building, College Road, Ireland
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28
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Mistlberger G, Medina-Castillo AL, Borisov SM, Mayr T, Fernández-Gutiérrez A, Fernandez-Sanchez JF, Klimant I. Mini-emulsion solvent evaporation: a simple and versatile way to magnetic nanosensors. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0492-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Doussineau T, Schulz A, Lapresta-Fernandez A, Moro A, Körsten S, Trupp S, Mohr G. On the Design of Fluorescent Ratiometric Nanosensors. Chemistry 2010; 16:10290-9. [DOI: 10.1002/chem.201000829] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Singh M, Padmaja GV. Synthesis, Molecular and Microstructural Study of Poly-N-Vinylpyrrolidone Oximo-L-Valyl-Siliconate with IR, 1. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.7.1869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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31
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Characterization of micrometer-sized magnetic optical sensor particles produced via spray-drying. MONATSHEFTE FUR CHEMIE 2010. [DOI: 10.1007/s00706-010-0262-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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32
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Borisov SM, Zenkl G, Klimant I. Phosphorescent platinum(II) and palladium(II) complexes with azatetrabenzoporphyrins-new red laser diode-compatible indicators for optical oxygen sensing. ACS APPLIED MATERIALS & INTERFACES 2010; 2:366-74. [PMID: 20186289 PMCID: PMC2828183 DOI: 10.1021/am900932z] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2009] [Accepted: 01/21/2010] [Indexed: 05/27/2023]
Abstract
A new class of oxygen indicators is described. Platinum(II) and palladium(II) complexes of azatetrabenzoporphyrins occupy an intermediate position between tetrabenzoporphyrins and phthalocyanines and combine features of both. The new dyes are excitable in the red part of the spectrum and possess strong room-temperature NIR phosphorescence. Other features include excellent spectral compatibility with the red laser diodes and 632.8 nm line of He-Ne laser, excellent photostability, and significantly shorter decay times than for the respective meso-tetraphenyltetrabenzoporphyrins. Applicability of the complexes for optical oxygen sensing is demonstrated.
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Affiliation(s)
- Sergey M Borisov
- Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 16, 8010 Graz, Austria.
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33
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Bonacchi S, Genovese D, Juris R, Montalti M, Prodi L, Rampazzo E, Sgarzi M, Zaccheroni N. Luminescent Chemosensors Based on Silica Nanoparticles. LUMINESCENCE APPLIED IN SENSOR SCIENCE 2010; 300:93-138. [DOI: 10.1007/128_2010_104] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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34
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Borisov SM, Mayr T, Mistlberger G, Klimant I. Dye-Doped Polymeric Particles for Sensing and Imaging. ADVANCED FLUORESCENCE REPORTERS IN CHEMISTRY AND BIOLOGY II 2010. [DOI: 10.1007/978-3-642-04701-5_6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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35
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Albert GC, Roumeliotis M, Carson JJL. The effect of temperature and freeze-thaw processes on gold nanorods. NANOTECHNOLOGY 2009; 20:505502. [PMID: 19923658 DOI: 10.1088/0957-4484/20/50/505502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
An application of increasing importance is the use of gold nanorods (AuNRs) as nanosensors and nanoprobes. We explored the possibility of using AuNRs as detectors for various temperature exposures. We measured the effects of freeze-thaw processes on AuNRs in aqueous solution by visual inspection (thermochromism), transmission electron microscopy (TEM; morphological reshaping and aggregation), and absorbance spectroscopy (plasmon peak shifts). TEM images revealed that AuNRs coalesced after prolonged exposures to -20 degrees C. The results suggest that solute rejection and cetyltrimethylammonium bromide (CTAB) bilayer crystallization underlie the mechanism of AuNR aggregation during freezing. This non-reversible aggregation appears to be unique to CTAB-protected AuNRs. Due to their unique freezing properties, we propose that AuNRs may have utility as freeze-thaw temperature nanoprobes.
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Yun YH, Eteshola E, Bhattacharya A, Dong Z, Shim JS, Conforti L, Kim D, Schulz MJ, Ahn CH, Watts N. Tiny medicine: nanomaterial-based biosensors. SENSORS (BASEL, SWITZERLAND) 2009; 9:9275-99. [PMID: 22291565 PMCID: PMC3260642 DOI: 10.3390/s91109275] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2009] [Revised: 11/03/2009] [Accepted: 11/09/2009] [Indexed: 12/15/2022]
Abstract
Tiny medicine refers to the development of small easy to use devices that can help in the early diagnosis and treatment of disease. Early diagnosis is the key to successfully treating many diseases. Nanomaterial-based biosensors utilize the unique properties of biological and physical nanomaterials to recognize a target molecule and effect transduction of an electronic signal. In general, the advantages of nanomaterial-based biosensors are fast response, small size, high sensitivity, and portability compared to existing large electrodes and sensors. Systems integration is the core technology that enables tiny medicine. Integration of nanomaterials, microfluidics, automatic samplers, and transduction devices on a single chip provides many advantages for point of care devices such as biosensors. Biosensors are also being used as new analytical tools to study medicine. Thus this paper reviews how nanomaterials can be used to build biosensors and how these biosensors can help now and in the future to detect disease and monitor therapies.
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Affiliation(s)
- Yeo-Heung Yun
- Nanoworld and Smart Materials and Devices Laboratory, College of Engineering, University of Cincinnati, OH, 45221, USA; E-Mail:
| | - Edward Eteshola
- Davis Heart & Lung Research Inst, Biomedical Engineering Dept. The Ohio State University, OH, 43210, USA; E-Mail:
| | - Amit Bhattacharya
- Environmental Health, College of Medicine, University of Cincinnati, OH, 45267, USA; E-Mail:
| | - Zhongyun Dong
- Internal Medicine, College of Medicine, University of Cincinnati, OH, 45221, USA; E-Mail: (Z.D.); (L.C.)
| | - Joon-Sub Shim
- BioMEMS Lab, College of Engineering, University of Cincinnati, OH, 45221, USA; E-Mail:
| | - Laura Conforti
- Internal Medicine, College of Medicine, University of Cincinnati, OH, 45221, USA; E-Mail: (Z.D.); (L.C.)
| | - Dogyoon Kim
- College of Dentistry, The Ohio State University, OH, 43210, USA; E-Mail:
| | - Mark J. Schulz
- Nanoworld and Smart Materials and Devices Laboratory, College of Engineering, University of Cincinnati, OH, 45221, USA; E-Mail:
| | - Chong H. Ahn
- BioMEMS Lab, College of Engineering, University of Cincinnati, OH, 45221, USA; E-Mail:
| | - Nelson Watts
- University of Cincinnati, Bone Health and Osteoporosis Center, College of Medicine, OH, 45221, USA; E-Mail:
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Borisov SM, Nuss G, Klimant I. Red light-excitable oxygen sensing materials based on platinum(II) and palladium(II) benzoporphyrins. Anal Chem 2009; 80:9435-42. [PMID: 19006407 DOI: 10.1021/ac801521v] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
New optical oxygen-sensing materials make use of highly luminescent NIR platinum(II) and palladium(II) complexes with benzoporphyrins. Bulk optodes based on polystyrene and sensing nanobeads based on poly(styrene-block-vinylpyrrolidone) and polysulfone are prepared and characterized. The versatility of the new materials is demonstrated. The features include excellent compatibility with most common excitation sources, high brightness, and suitability for subcutaneous oxygen monitoring.
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Affiliation(s)
- S M Borisov
- Institute of Analytical Chemistry and Radiochemistry, Graz University of Technology, Stremayrgasse 16, 8010 Graz, Austria.
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38
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Lebedev AY, Cheprakov AV, Sakadžić S, Boas DA, Wilson DF, Vinogradov SA. Dendritic phosphorescent probes for oxygen imaging in biological systems. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1292-304. [PMID: 20072726 PMCID: PMC2805241 DOI: 10.1021/am9001698] [Citation(s) in RCA: 132] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Oxygen levels in biological systems can be measured by the phosphorescence quenching method using probes with controllable quenching parameters and defined biodistributions. We describe a general approach to the construction of phosphorescent nanosensors with tunable spectral characteristics, variable degrees of quenching, and a high selectivity for oxygen. The probes are based on bright phosphorescent Pt and Pd complexes of porphyrins and symmetrically pi-extended porphyrins (tetrabenzoporphyrins and tetranaphthoporphyrins). pi-Extension of the core macrocycle allows tuning of the spectral parameters of the probes in order to meet the requirements of a particular imaging application (e.g., oxygen tomography versus planar microscopic imaging). Metalloporphyrins are encapsulated into poly(arylglycine) dendrimers, which fold in aqueous environments and create diffusion barriers for oxygen, making it possible to regulate the sensitivity and the dynamic range of the method. The periphery of the dendrimers is modified with poly(ethylene glycol) residues, which enhance the probe's solubility, diminish toxicity, and help prevent interactions of the probes with the biological environment. The probe's parameters were measured under physiological conditions and shown to be unaffected by the presence of biomacromolecules. The performance of the probes was demonstrated in applications, including in vivo microscopy of vascular pO(2) in the rat brain.
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Leiding T, Górecki K, Kjellman T, Vinogradov SA, Hägerhäll C, Arsköld SP. Precise detection of pH inside large unilamellar vesicles using membrane-impermeable dendritic porphyrin-based nanoprobes. Anal Biochem 2009; 388:296-305. [PMID: 19248752 DOI: 10.1016/j.ab.2009.02.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Accepted: 02/17/2009] [Indexed: 10/21/2022]
Abstract
Accurate real-time measurements of proton concentration gradients are pivotal to mechanistic studies of proton translocation by membrane-bound enzymes. Here we report a detailed characterization of the pH-sensitive fluorescent nanoprobe Glu(3), which is well suited for pH measurements in microcompartmentalized biological systems. The probe is a polyglutamic porphyrin dendrimer in which multiple carboxylate termini ensure its high water solubility and prevent its diffusion across phospholipid membranes. The probe's pK is in the physiological pH range, and its protonation can be followed ratiometrically by absorbance or fluorescence in the ultraviolet-visible spectral region. The usefulness of the probe was enhanced by using a semiautomatic titration system coupled to a charge-coupled device (CCD) spectrometer, enabling fast and accurate titrations and full spectral coverage of the system at millisecond time resolution. The probe's pK was measured in bulk solutions as well as inside large unilamellar vesicles in the presence of physiologically relevant ions. Glu(3) was found to be completely membrane impermeable, and its distinct spectroscopic features permit pH measurements inside closed membrane vesicles, enabling quantitative mechanistic studies of membrane-spanning proteins. Performance of the probe was demonstrated by monitoring the rate of proton leakage through the phospholipid bilayer in large vesicles with and without the uncoupler gramicidin present. Overall, as a probe for biological proton translocation measurements, Glu(3) was found to be superior to the commercially available pH indicators.
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Affiliation(s)
- Thom Leiding
- Department of Biochemistry, Center for Chemistry and Chemical Engineering, Lund University, 22100 Lund, Sweden
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40
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Shang L, Qin C, Jin L, Wang L, Dong S. Turn-on fluorescent detection of cyanide based on the inner filter effect of silver nanoparticles. Analyst 2009; 134:1477-82. [DOI: 10.1039/b823471j] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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