1
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Wu CC, Wang CJ, Chang CLT, Shiku H, Wang YR, Yan JD, Ding SJ. Dissolved Oxygen-Sensing Chip Integrating an Open Container Connected with a Position-Raised Channel for Estimation of Cellular Mitochondrial Activity. ACS Sens 2022; 7:1808-1818. [PMID: 35748570 DOI: 10.1021/acssensors.1c02287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The measurement of oxygen consumption of adherent cells is a profoundly important issue for estimating the bioenergetic health and metabolism activity of cells. The study describes the construction of a microfluidic chip consisting of an open container connected with a position-raised channel and dissolved oxygen (DO)-sensing gold ultramicroelectrodes for quantifying the oxygen consumption rate (OCR) of adherent cells. The microfluidic chip design can reduce the action of shear force on the adherent cells during medium replacement. The residual concentration of analytes in the open container was only 4.4% after solution replacement via the position-raised channel. The DO reduction current measured by ultramicroelectrodes averaged in the range of 40-60 s presented high reproducibility with a 1.1% relative standard deviation suitable for OCR calculation. After short-term (90 min) cultivation, the microfluidic chip can monitor the time-dependent change in the OCR of 3T3-L1 cells for several hours by repeatedly replacing the culture medium or with the stimulation of different mitochondrial inhibitors. The presented microfluidic cell-based chip has great promise for drug screening and chemosensitivity testing by measuring OCR to evaluate the mitochondrial function of adherent cells.
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Affiliation(s)
- Ching-Chou Wu
- Department of Bio-Industrial Mechatronics Engineering, National Chung Hsing University, Taichung City 402, Taiwan.,Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung City 402, Taiwan
| | - Chieh-Jen Wang
- Department of Bio-Industrial Mechatronics Engineering, National Chung Hsing University, Taichung City 402, Taiwan
| | | | - Hitoshi Shiku
- Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Yu-Ren Wang
- Department of Bio-Industrial Mechatronics Engineering, National Chung Hsing University, Taichung City 402, Taiwan
| | - Jia-De Yan
- Department of Bio-Industrial Mechatronics Engineering, National Chung Hsing University, Taichung City 402, Taiwan
| | - Shinn-Jyh Ding
- Department of Dentistry, Chung Shan Medical University Hospital, Taichung City 402, Taiwan, ROC.,Institute of Oral Science, Chung Shan Medical University, Taichung City 402, Taiwan
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2
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Mihajlovic M, Vinken M. Mitochondria as the Target of Hepatotoxicity and Drug-Induced Liver Injury: Molecular Mechanisms and Detection Methods. Int J Mol Sci 2022; 23:ijms23063315. [PMID: 35328737 PMCID: PMC8951158 DOI: 10.3390/ijms23063315] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 12/12/2022] Open
Abstract
One of the major mechanisms of drug-induced liver injury includes mitochondrial perturbation and dysfunction. This is not a surprise, given that mitochondria are essential organelles in most cells, which are responsible for energy homeostasis and the regulation of cellular metabolism. Drug-induced mitochondrial dysfunction can be influenced by various factors and conditions, such as genetic predisposition, the presence of metabolic disorders and obesity, viral infections, as well as drugs. Despite the fact that many methods have been developed for studying mitochondrial function, there is still a need for advanced and integrative models and approaches more closely resembling liver physiology, which would take into account predisposing factors. This could reduce the costs of drug development by the early prediction of potential mitochondrial toxicity during pre-clinical tests and, especially, prevent serious complications observed in clinical settings.
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3
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Fedi A, Vitale C, Giannoni P, Caluori G, Marrella A. Biosensors to Monitor Cell Activity in 3D Hydrogel-Based Tissue Models. SENSORS (BASEL, SWITZERLAND) 2022; 22:1517. [PMID: 35214418 PMCID: PMC8879987 DOI: 10.3390/s22041517] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/06/2022] [Accepted: 02/09/2022] [Indexed: 12/13/2022]
Abstract
Three-dimensional (3D) culture models have gained relevant interest in tissue engineering and drug discovery owing to their suitability to reproduce in vitro some key aspects of human tissues and to provide predictive information for in vivo tests. In this context, the use of hydrogels as artificial extracellular matrices is of paramount relevance, since they allow closer recapitulation of (patho)physiological features of human tissues. However, most of the analyses aimed at characterizing these models are based on time-consuming and endpoint assays, which can provide only static and limited data on cellular behavior. On the other hand, biosensing systems could be adopted to measure on-line cellular activity, as currently performed in bi-dimensional, i.e., monolayer, cell culture systems; however, their translation and integration within 3D hydrogel-based systems is not straight forward, due to the geometry and materials properties of these advanced cell culturing approaches. Therefore, researchers have adopted different strategies, through the development of biochemical, electrochemical and optical sensors, but challenges still remain in employing these devices. In this review, after examining recent advances in adapting existing biosensors from traditional cell monolayers to polymeric 3D cells cultures, we will focus on novel designs and outcomes of a range of biosensors specifically developed to provide real-time analysis of hydrogel-based cultures.
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Affiliation(s)
- Arianna Fedi
- National Research Council of Italy, Institute of Electronics, Computer and Telecommunication Engineering (IEIIT), 16149 Genoa, Italy; (A.F.); (C.V.)
- Department of Computer Science, Bioengineering, Robotics and Systems Engineering (DIBRIS), University of Genoa, 16126 Genoa, Italy
| | - Chiara Vitale
- National Research Council of Italy, Institute of Electronics, Computer and Telecommunication Engineering (IEIIT), 16149 Genoa, Italy; (A.F.); (C.V.)
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy;
| | - Paolo Giannoni
- Department of Experimental Medicine (DIMES), University of Genoa, 16132 Genoa, Italy;
| | - Guido Caluori
- IHU LIRYC, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, 33600 Pessac, France;
- INSERM UMR 1045, Cardiothoracic Research Center of Bordeaux, University of Bordeaux, 33600 Pessac, France
| | - Alessandra Marrella
- National Research Council of Italy, Institute of Electronics, Computer and Telecommunication Engineering (IEIIT), 16149 Genoa, Italy; (A.F.); (C.V.)
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4
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Saccomano SC, Cash KJ. A near-infrared optical nanosensor for measuring aerobic respiration in microbial systems. Analyst 2021; 147:120-129. [PMID: 34854441 DOI: 10.1039/d1an01855h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We developed a ratiometric oxygen-sensitive nanosensor and demonstrated application in monitoring metabolic oxygen consumption in microbial samples over time. Based on a near-infrared (NIR) emitting oxygen-quenched luminophore, platinum(II) octaethylporphine ketone (PtOEPK), along with a stable dioctadecyl dicarbocyanine reference dye (DiD), this nanosensor system provides an advantageous approach for overcoming imaging issues in biological systems, such as autofluorescence and optical scattering in the visible wavelength region. The dyes are encapsulated within a polymer-based nanoparticle matrix to maintain them at a constant ratio in biological samples, precluding the need for complex synthetic approaches. With this constant ratio of the two dyes, the nanosensor response can be measured as a ratio of their two signals, accounting for nanosensor concentration artifacts in measurements. The nanosensors are reversible, which enabled us to temporally monitor systems in which dissolved oxygen concentrations both increase and decrease. These sensors were applied for the monitoring of oxygen in samples of Saccharomyces cerevisiae (brewing yeast) in a 96-well optical fluorescence plate reader format over 60 h. By mixing the nanosensors directly into the sample well with the yeast, we were able to dynamically track metabolic activity changes over time due to varying cell concentration and exposure to an antimicrobial agent. This system could be a potential platform for high-throughput screening of various species or variants of microbes with unknown metabolic rates in response to external stimuli (antimicrobials, metabolites, etc.).
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Affiliation(s)
- Samuel C Saccomano
- Chemical and Biological Engineering Department, Colorado School of Mines, Golden, CO, USA.
| | - Kevin J Cash
- Chemical and Biological Engineering Department, Colorado School of Mines, Golden, CO, USA. .,Quantitative Biosciences and Engineering, Colorado School of Mines, Golden, CO, USA
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5
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Honda T, Hirakawa Y, Mizukami K, Yoshihara T, Tanaka T, Tobita S, Nangaku M. A distinctive distribution of hypoxia-inducible factor-1α in cultured renal tubular cells with hypoperfusion simulated by coverslip placement. Physiol Rep 2021; 9:e14689. [PMID: 33369883 PMCID: PMC7769172 DOI: 10.14814/phy2.14689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/11/2020] [Accepted: 11/12/2020] [Indexed: 11/24/2022] Open
Abstract
Chronic hypoxia in the renal tubulointerstitium plays a key role in the progression of chronic kidney disease (CKD). It is therefore important to investigate tubular hypoxia and the activity of hypoxia-inducible factor (HIF)-1α in response to hypoxia. Rarefaction of the peritubular capillary causes hypoperfusion in CKD; however, the effect of hypoperfusion on HIFs has rarely been investigated. We induced hypoperfusion caused by coverslip placement in human kidney-2 cells, and observed an oxygen gradient under the coverslip. Immunocytochemistry of HIF-1α showed a doughnut-shaped formation on the edge of a pimonidazole-positive area, which we named the "HIF-ring". The oxygen tension of the HIF-ring was estimated to be between approximately 4 mmHg and 20 mmHg. This result was not compatible with those of past research showing HIF-1α accumulation in the anoxic range with homogeneous oxygen tension. We further observed the presence of a pH gradient under a coverslip, as well as a shift of the HIF ring due to changes in the pH of the culture medium, suggesting that the HIF ring was formed by suppression of HIF-1α related to low pH. This research demonstrated that HIF-1α activation mimics the physiological state in cultured cells with hypoperfusion.
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Affiliation(s)
- Tomoko Honda
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Yosuke Hirakawa
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Kiichi Mizukami
- Graduate School of Science and TechnologyGunma UniversityGunmaJapan
| | | | - Tetsuhiro Tanaka
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Seiji Tobita
- Graduate School of Science and TechnologyGunma UniversityGunmaJapan
| | - Masaomi Nangaku
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
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6
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García-Álvarez F, Martínez-García M. Dendrimer Porphyrins: Applications in Nanomedicine. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999201026203527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nanomedicine is a fascinating field of multidisciplinary study focused on developing
techniques that fight various diseases using nanoparticles. Among the various nanoparticles
used in nanomedicine, dendrimers have received increasing interest in recent years because
of the versatility that their structural characteristics give them. Specifically, dendrimer
porphyrins are compounds that incorporate macro heterocyclic-aromatic units within the dendritic
architecture and exhibit interesting photodynamic properties that are used to combat
various diseases using non-invasive methods. In the past 17 years, few studies of the application
of dendrimer porphyrins in nanomedicine have been published. This review focuses on
presenting recent studies of dendrimer porphyrins with possible applications in the field of
nanomedicine.
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Affiliation(s)
- Fernando García-Álvarez
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito Exterior, Coyoacán, C.P. 04510, México D.F., Mexico
| | - Marcos Martínez-García
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito Exterior, Coyoacán, C.P. 04510, México D.F., Mexico
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7
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Li J, Zhai J, Wang Y, Yang W, Xie X. Dual functional luminescent nanoprobes for monitoring oxygen and chloride concentration changes in cells. Chem Commun (Camb) 2020; 56:14980-14983. [PMID: 33179655 DOI: 10.1039/d0cc06258h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A dual functional nanoprobe Pd-Q+@PDMS was proposed to simultaneously monitor Cl- and O2, leading to the determination of an average Cl- concentration of 85.7 ± 5.5 mM in lysosomes of HeLa cells. Mimicking ischemic conditions, the cells exhibited a luminescence change corresponding to a decreasing subcellular Cl- concentration.
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Affiliation(s)
- Jing Li
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
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8
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Odai S, Ito H, Kamachi T. Dendrimer porphyrins as the oxygen sensor for intracellular imaging to suppress interaction towards biological molecules. J Clin Biochem Nutr 2019; 65:178-184. [PMID: 31777418 PMCID: PMC6877409 DOI: 10.3164/jcbn.19-13] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 02/07/2019] [Indexed: 12/19/2022] Open
Abstract
Optical methods using phosphorescence quenching by oxygen are suitable for the measurement of oxygen concentration within cells. In cells, however, the dyes such as Pt-porphyrins interact with biological components so that their optical properties are changed. Therefore, the absolute oxygen concentration determination in cells is difficult. To suppress this interaction, we focussed on porphyrin-cored dendrimers (dendrimer-porphyrins) and synthesized 2nd–4th generation dendrimer-porphyrins with various surface functional groups (G2–G4, ARG, αGLU and γGLU). These dendrimer-porphyrins showed oxygen sensing property and the change of their spectroscopic properties by biomolecules was supressed. Additionally, the dendrimer-porphyrins were accumulated in cells even in the presence of serum, so oxygen concentration imaging without the effect of serum starvation was also achieved.
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Affiliation(s)
- Shunsuke Odai
- Department of Life Science and Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Hidehiro Ito
- Department of Life Science and Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Toshiaki Kamachi
- Department of Life Science and Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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9
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Del Secco B, Ravotto L, Esipova TV, Vinogradov SA, Genovese D, Zaccheroni N, Rampazzo E, Prodi L. Optimized synthesis of luminescent silica nanoparticles by a direct micelle-assisted method. Photochem Photobiol Sci 2019; 18:2142-2149. [PMID: 31011734 DOI: 10.1039/c9pp00047j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Silica nanoparticles (NPs) are versatile nanomaterials, which are safe with respect to biomedical applications, and therefore are highly investigated. The advantages of NPs include their ease of preparation, inexpensive starting materials and the possibility of functionalization or loading with various doping agents. However, the solubility of the doping agent(s) imposes constraints on the choice of the reaction system and hence limits the range of molecules that can be included in the interior of NPs. To overcome this problem, herein, we improved the current state of the art synthetic strategy based on Pluronic F127 by enabling the synthesis in the presence of large amounts of organic solvents. The new method enables the preparation of nanoparticles doped with large amounts of water-insoluble doping agents. To illustrate the applicability of the technology, we successfully incorporated a range of phosphorescent metalloporphyrins into the interior of NPs. The resulting phosphorescent nanoparticles may exhibit potential for biological oxygen sensing.
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Affiliation(s)
- Benedetta Del Secco
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
| | - Luca Ravotto
- Departments of Biochemistry and Biophysics and of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Tatiana V Esipova
- Departments of Biochemistry and Biophysics and of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Sergei A Vinogradov
- Departments of Biochemistry and Biophysics and of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Damiano Genovese
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
| | - Nelsi Zaccheroni
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
| | - Enrico Rampazzo
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
| | - Luca Prodi
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
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10
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Greene LE, Lincoln R, Cosa G. Spatio-temporal monitoring of lipid peroxyl radicals in live cell studies combining fluorogenic antioxidants and fluorescence microscopy methods. Free Radic Biol Med 2018; 128:124-136. [PMID: 29649566 DOI: 10.1016/j.freeradbiomed.2018.04.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/05/2018] [Accepted: 04/06/2018] [Indexed: 12/28/2022]
Abstract
Lipid peroxidation of polyunsaturated fatty acids in cells may occur via their catalytic autoxidation through peroxyl radicals under oxidative stress conditions. Lipid peroxidation is related to a number of pathologies, and may be invoked in new forms of regulated cell death, yet it may also have beneficial roles in cell signaling cascades. Antioxidants are a natural line of defense against lipid peroxidation, and may accordingly impact the biological outcome associated with the redox chemistry of lipid peroxidation. Critical to unraveling the physiological and pathological role of lipid peroxidation is the development of novel probes with the partition, chemical sensitivity and more importantly, molecular specificity, enabling the spatial and temporal imaging of peroxyl radicals in the lipid membranes of live cells, reporting on the redox status of the cell membrane. This review describes our recent progress to visualize lipid peroxidation in model membrane systems and in live cell studies. Our work portrays the mechanistic insight leading to the development of a highly sensitive probe to monitor lipid peroxyl radicals (LOO•). It also describes technical aspects including reagents and fluorescence microscopy methodologies to consider in order to achieve the much sought after monitoring of rates of lipid peroxyl radical production in live cell studies, be it under oxidative stress but also under cell homeostasis. This review seeks to bring attention to the study of lipid redox reactions and to lay the groundwork for the adoption of fluorogenic antioxidant probeshancement and maximum intensity recorded in turn provide a benchmark to estimate, when compared to the control BODIPY dye lacking the intramolecular PeT based switch, the overall exte and related fluorescence microscopy methods toward gaining rich spatiotemporal information on lipid peroxidation in live cells.
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Affiliation(s)
- Lana E Greene
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM/CQMF), McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 0B8
| | - Richard Lincoln
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM/CQMF), McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 0B8
| | - Gonzalo Cosa
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM/CQMF), McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 0B8.
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11
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Affiliation(s)
- Sarah M. Parke
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Dr. Edmonton, Alberta Canada T6G 2G2
| | - Eric Rivard
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Dr. Edmonton, Alberta Canada T6G 2G2
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12
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Parke SM, Narreto MAB, Hupf E, McDonald R, Ferguson MJ, Hegmann FA, Rivard E. Understanding the Origin of Phosphorescence in Bismoles: A Synthetic and Computational Study. Inorg Chem 2018; 57:7536-7549. [PMID: 29553730 DOI: 10.1021/acs.inorgchem.8b00149] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A series of bismuth heterocycles, termed bismoles, were synthesized via the efficient metallacycle transfer (Bi/Zr exchange) involving readily accessible zirconacycles. The luminescence properties of three structurally distinct bismoles were explored in detail via time-integrated and time-resolved photoluminescence spectroscopy using ultrafast laser excitation. Moreover, time-dependent density functional theory computations were used to interpret the nature of fluorescence versus phosphorescence in these bismuth-containing heterocycles and to guide the future preparation of luminescent materials containing heavy inorganic elements. Specifically, orbital character at bismuth within excited states is an important factor for achieving enhanced spin-orbit coupling and to promote phosphorescence. The low aromaticity of the bismole rings was demonstrated by formation of a CuCl π-complex, and the nature of the alkene-CuCl interaction was probed by real-space bonding indicators derived from Atoms-In-Molecules, the Electron Localizability Indicator, and the Non-Covalent Interaction index; such tools are of great value in interpreting nonstandard bonding environments within inorganic compounds.
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Affiliation(s)
- Sarah M Parke
- Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
| | - Mary A B Narreto
- Department of Physics , University of Alberta , Edmonton , Alberta T6G 2E1 , Canada
| | - Emanuel Hupf
- Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
| | - Robert McDonald
- Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
| | - Michael J Ferguson
- Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
| | - Frank A Hegmann
- Department of Physics , University of Alberta , Edmonton , Alberta T6G 2E1 , Canada
| | - Eric Rivard
- Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta T6G 2G2 , Canada
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13
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Kondrashina A, Papkovsky D, Giblin L. Physiological Gut Oxygenation Alters GLP-1 Secretion from the Enteroendocrine Cell Line STC-1. Mol Nutr Food Res 2018; 62. [DOI: 10.1002/mnfr.201700568] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 09/05/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Alina Kondrashina
- Food for Health Ireland; Teagasc Food Research Centre; Moorepark Fermoy Co. Cork Ireland
| | - Dmitri Papkovsky
- School of Biochemistry and Cell Biology; University College Cork; Cork Ireland
| | - Linda Giblin
- Food for Health Ireland; Teagasc Food Research Centre; Moorepark Fermoy Co. Cork Ireland
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14
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Zheng Z, Ayhan MM, Liao YY, Calin N, Bucher C, Andraud C, Bretonnière Y. Design of two-photon absorbing fluorophores for FRET antenna-core oxygen probes. NEW J CHEM 2018. [DOI: 10.1039/c7nj05073a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Four two-photon absorbing fluorophores A1–A4 are reported and their spectroscopic properties are analyzed for use, in combination with palladium–porphyrinato complexes C1 and C2, as two-photon absorbing antennas and energy donors for FRET-based antenna-core oxygen sensitive phosphorescent probes.
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Affiliation(s)
- Zheng Zheng
- Univ Lyon
- ENS de Lyon
- CNRS UMR 5182
- UCB Lyon I
- Laboratoire de Chimie
| | | | - Yuan-Yuan Liao
- Univ Lyon
- ENS de Lyon
- CNRS UMR 5182
- UCB Lyon I
- Laboratoire de Chimie
| | - Nathalie Calin
- Univ Lyon
- ENS de Lyon
- CNRS UMR 5182
- UCB Lyon I
- Laboratoire de Chimie
| | | | - Chantal Andraud
- Univ Lyon
- ENS de Lyon
- CNRS UMR 5182
- UCB Lyon I
- Laboratoire de Chimie
| | - Yann Bretonnière
- Univ Lyon
- ENS de Lyon
- CNRS UMR 5182
- UCB Lyon I
- Laboratoire de Chimie
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15
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Place TL, Domann FE, Case AJ. Limitations of oxygen delivery to cells in culture: An underappreciated problem in basic and translational research. Free Radic Biol Med 2017; 113:311-322. [PMID: 29032224 PMCID: PMC5699948 DOI: 10.1016/j.freeradbiomed.2017.10.003] [Citation(s) in RCA: 240] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 10/02/2017] [Accepted: 10/04/2017] [Indexed: 01/08/2023]
Abstract
Molecular oxygen is one of the most important variables in modern cell culture systems. Fluctuations in its concentration can affect cell growth, differentiation, signaling, and free radical production. In order to maintain culture viability, experimental validity, and reproducibility, it is imperative that oxygen levels be consistently maintained within physiological "normoxic" limits. Use of the term normoxia, however, is not consistent among scientists who experiment in cell culture. It is typically used to describe the atmospheric conditions of a standard incubator, not the true microenvironment to which the cells are exposed. This error may lead to the situation where cells grown in a standard "normoxic" oxygen concentration may actually be experiencing a wide range of conditions ranging from hyperoxia to near-anoxic conditions at the cellular level. This apparent paradox is created by oxygen's sluggish rate of diffusion through aqueous medium, and the generally underappreciated effects that cell density, media volume, and barometric pressure can have on pericellular oxygen concentration in a cell culture system. This review aims to provide an overview of this phenomenon we have termed "consumptive oxygen depletion" (COD), and includes a basic review of the physics, potential consequences, and alternative culture methods currently available to help circumvent this largely unrecognized problem.
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Affiliation(s)
- Trenton L. Place
- Department of Obstetrics & Gynecology, Carver College of Medicine, The University of Iowa, Iowa City, IA
| | - Frederick E. Domann
- Department of Radiation Oncology, Carver College of Medicine, The University of Iowa, Iowa City, IA
- Department of Pathology, Carver College of Medicine, The University of Iowa, Iowa City, IA
- Department of Surgery, Carver College of Medicine, The University of Iowa, Iowa City, IA
- Corresponding authors: Department of Physiology, University of Nebraska Medical Center, Omaha, NE 68198.
| | - Adam J. Case
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE
- Corresponding authors: Department of Physiology, University of Nebraska Medical Center, Omaha, NE 68198.
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16
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Takahashi E, Yamaoka Y. Simple and inexpensive technique for measuring oxygen consumption rate in adherent cultured cells. J Physiol Sci 2017; 67:731-737. [PMID: 28785888 PMCID: PMC10717709 DOI: 10.1007/s12576-017-0563-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 07/25/2017] [Indexed: 01/08/2023]
Abstract
Measurement of cellular oxygen consumption rate (OCR) is essential in assessing roles of mitochondria in physiology and pathophysiology. Classical techniques, in which polarographic oxygen electrode measures the extracellular oxygen concentration in a closed measuring vessel, require isolation and suspension of the cell. Because cell functions depend on the extracellular milieu including the extracellular matrix, isolation of cultured cells prior to the measurement may significantly affect the OCR. More recent techniques utilize optical methods in which oxygen-dependent quenching of fluorophores determines oxygen concentration in the medium at a few microns above the surface of the cultured cells. These techniques allow the OCR measurement in cultured cells adhered to the culture dish. However, this technique requires special equipment such as a fluorescence lifetime microplate reader or specialized integrated system, which are usually quite expensive. Here, we introduce a simple and inexpensive technique for measuring OCR in adherent cultured cells that utilizes conventional fluorescence microscopy and a glassware called a gap cover glass.
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Affiliation(s)
- Eiji Takahashi
- Advanced Technology Fusion, Graduate School of Science and Engineering, Saga University, Saga, 840-8502, Japan.
| | - Yoshihisa Yamaoka
- Advanced Technology Fusion, Graduate School of Science and Engineering, Saga University, Saga, 840-8502, Japan
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